swish/commit

Updated generated files

diff --git a/web/js/swish-min.js b/web/js/swish-min.js
index d6b40ef..a8e5a9f 100644
--- a/web/js/swish-min.js
+++ b/web/js/swish-min.js
@@ -1,68858 +1,40 @@
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-
-/*  Part of SWISH
-
-    Author:        Jan Wielemaker
-    E-mail:        J.Wielemaker@cs.vu.nl
-    WWW:           http://www.swi-prolog.org
-    Copyright (C): 2014-2016, VU University Amsterdam
-			      CWI Amsterdam
-    All rights reserved.
-
-    Redistribution and use in source and binary forms, with or without
-    modification, are permitted provided that the following conditions
-    are met:
-
-    1. Redistributions of source code must retain the above copyright
-       notice, this list of conditions and the following disclaimer.
-
-    2. Redistributions in binary form must reproduce the above copyright
-       notice, this list of conditions and the following disclaimer in
-       the documentation and/or other materials provided with the
-       distribution.
-
-    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-    "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-    LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
-    FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
-    COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
-    INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
-    BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
-    LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
-    CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-    LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
-    ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
-    POSSIBILITY OF SUCH DAMAGE.
-*/
-
-/**
- * @fileOverview
- *
- * RequireJS module to get server configuration information. This module
- * fetches "config.json" relative  to  the   main  document.  The Prolog
- * server emits a  JSON  object  that   provides  the  location  of  all
- * explicitly  identified  HTTP  handlers.  These    are   intended  for
- * (typically) AJAX calls:
- *
- * ```
- *   $.ajax({ url: config.http.locations.swish_examples,
- *            ...
- * ```
- *
- * @version 0.2.0
- * @author Jan Wielemaker, J.Wielemaker@vu.nl
- * @requires jquery
- */
-
-define('config',[ "jquery" ],
-       function($) {
-var KEY = "SWISHCONFIG";
-
-/* Configuration of various server components.  We provide
-   defaults for the case that these files are served from
-   a non-Prolog server.
-*/
-
-var config;
-
-function getCachedConfig() {
-  if ( typeof(Storage) !== "undefined" && window.swish.config_hash ) {
-    var str;
-
-    if ( (str = localStorage.getItem(KEY)) ) {
-      value = JSON.parse(str);
-      if ( value.hash == window.swish.config_hash )
-	return value.config;
-    }
-  }
-}
-
-function setCachedConfig(config) {
-  if ( typeof(Storage) !== "undefined" && window.swish.config_hash ) {
-    localStorage.setItem(KEY, JSON.stringify(
-      { hash: window.swish.config_hash,
-        config: config
-      }));
-  }
-}
-
-if ( !config ) {
-  if ( !(config = getCachedConfig()) ) {
-    $.ajax("swish_config.json",
-	   { dataType: "json",
-	     async: false,
-	     success: function(data) {
-	       config = data;
-	       setCachedConfig(config);
-	     },
-	     error: function() {
-	       alert("Failed to fetch configuration from server");
-	     }
-	   });
-  }
-}
-
-return config;
-});
-
-
-
-
-/*  Part of SWISH
-
-    Author:        Jan Wielemaker
-    E-mail:        J.Wielemaker@cs.vu.nl
-    WWW:           http://www.swi-prolog.org
-    Copyright (C): 2014-2016, VU University Amsterdam
-			      CWI Amsterdam
-    All rights reserved.
-
-    Redistribution and use in source and binary forms, with or without
-    modification, are permitted provided that the following conditions
-    are met:
-
-    1. Redistributions of source code must retain the above copyright
-       notice, this list of conditions and the following disclaimer.
-
-    2. Redistributions in binary form must reproduce the above copyright
-       notice, this list of conditions and the following disclaimer in
-       the documentation and/or other materials provided with the
-       distribution.
-
-    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-    "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-    LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
-    FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
-    COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
-    INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
-    BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
-    LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
-    CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-    LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
-    ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
-    POSSIBILITY OF SUCH DAMAGE.
-*/
-
-/**
- * @fileOverview
- *
- * Manage persistent data such as preferences.
- *
- * @version 0.2.0
- * @author Jan Wielemaker, J.Wielemaker@vu.nl
- */
-
-define('preferences',["jquery"],
-       function($) {
-  var hasLocalStore = (typeof(Storage) !== "undefined");
-  var defaults = {};
-  var inform = {};
-
-  var preferences = {
-    /**
-     * @returns {Boolean} indicating whether persistent storage is
-     * supported.
-     */
-    persistent: function() {
-      return hasLocalStore;
-    },
-
-    /**
-     * Store that we do not want to see info dialogue with a given
-     * identifier again.
-     * @param {String} id
-     */
-    setNotAgain: function(id) {
-      if ( hasLocalStore ) {
-	var data = readNotAgain();
-
-	if ( data.indexOf(id) < 0 ) {
-	  data.push(id);
-	  localStorage.setItem("notagain", JSON.stringify(data));
-	}
-      }
-    },
-
-    /**
-     * @returns {Boolean} `true` if the user choose not to see this
-     * dialogue again
-     * @param {String} id identifier to test
-     */
-    notagain: function(id) {
-      if ( hasLocalStore ) {
-	var data = readNotAgain();
-	return data.indexOf(id) >= 0;
-      }
-      return false;
-    },
-
-    /**
-     * Broadcast the change of a preference.
-     */
-    broadcast: function(name, value) {
-      var sel;
-
-      if ( inform.name == undefined )
-	sel = ".swish-event-receiver";
-      else if ( inform.name == null )
-	return;
-      else
-	sel = inform.name;
-
-      $(sel).trigger("preference", { name: name, value: value });
-    },
-
-    /**
-     * Set the value of a preference and broadcast it.
-     * FIXME: we should only broadcast if the value has changed.
-     * @param {String} name describes the name of the preference
-     * @param {Any} value describes the value.  Values are stored
-     * using JSON serialization.
-     */
-    setVal: function(name, value) {
-      if ( hasLocalStore ) {
-	localStorage.setItem(name, JSON.stringify(value));
-      }
-      this.broadcast(name, value);
-    },
-
-    /**
-     * @param {String} name describes the name of the preference
-     * @param {Any} value describes the default value.
-     */
-    setDefault: function(name, value) {
-      defaults[name] = value;
-    },
-
-    /**
-     * @param {String} name describes the name of the preference
-     * @param {String} jQuery selector for elements to inform.  If
-     * `null`, nobody is informed.
-     */
-    setInform: function(name, value) {
-      inform[name] = value;
-    },
-
-    /**
-     * @param {String} name describes the name of the preference
-     */
-    getVal: function(name) {
-      if ( hasLocalStore ) {
-	var str;
-
-	if ( (str = localStorage.getItem(name)) ) {
-	  value = JSON.parse(str);
-	  return value;
-	}
-      }
-      return defaults[name];
-    },
-
-    /**
-     * Set a preference value for a document.
-     */
-    setDocVal: function(docid, name, value) {
-      var prefs = preferences.getVal(docid)||{};
-      prefs[name] = value;
-      preferences.setVal(docid, prefs);
-    },
-
-    /**
-     * Get a preference value for a document.
-     */
-    getDocVal: function(docid, name, def) {
-      var prefs = preferences.getVal(docid)||{};
-      return prefs[name] === undefined ? def : prefs[name];
-    }
-  }
-
-  function readNotAgain() {
-    var str = localStorage.getItem("notagain") || "[]";
-    var notagain;
-
-    try {
-      data = JSON.parse(str);
-      if ( typeof(data) != "object" )
-	data = [];
-    } catch(err) {
-      data = [];
-    }
-
-    return data;
-  }
-
-  return preferences;
-});
-
-/*  Part of SWISH
-
-    Author:        Jan Wielemaker
-    E-mail:        J.Wielemaker@cs.vu.nl
-    WWW:           http://www.swi-prolog.org
-    Copyright (C): 2016, VU University Amsterdam
-			 CWI Amsterdam
-    All rights reserved.
-
-    Redistribution and use in source and binary forms, with or without
-    modification, are permitted provided that the following conditions
-    are met:
-
-    1. Redistributions of source code must retain the above copyright
-       notice, this list of conditions and the following disclaimer.
-
-    2. Redistributions in binary form must reproduce the above copyright
-       notice, this list of conditions and the following disclaimer in
-       the documentation and/or other materials provided with the
-       distribution.
-
-    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-    "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-    LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
-    FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
-    COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
-    INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
-    BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
-    LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
-    CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-    LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
-    ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
-    POSSIBILITY OF SUCH DAMAGE.
-*/
-
-/**
- * @fileOverview
- *
- * Manage hyper links.
- *
- * @version 0.2.0
- * @author Jan Wielemaker, J.Wielemaker@vu.nl
- */
-
-define('links',["jquery", "config", "modal"],
-       function($, config, modal) {
-
-  var functions = {
-    /** Decode a PlDoc specification and, if valid, open the
-     * corresponding documentation.
-     * @arg {String} from The PlDoc specification.  Accepted if it
-     * is of the form `[.*:].*[/]/?\d+`
-     * @return Boolean `true` if the string was recognised
-     */
-    PlDoc: function(from, ev) {
-      function parsePred(s) {
-	var pred = {};
-	var i;
-
-	if ( (i=s.indexOf(":")) > 0 ) {
-	  pred.module = s.substring(0,i);
-	  s = s.slice(i+1);
-	}
-	if ( (i=s.indexOf("/")) > 0 ) {
-	  pred.name = s.substring(0,i);
-	  if ( s.charAt(i+1) == '/' )	/* name//arity is a non-terminal */
-	    pred.arity = parseInt(s.slice(i+2))+2;
-	  else
-	    pred.arity = parseInt(s.slice(i+1));
-
-	  if ( !isNaN(pred.arity) )
-	    return pred;
-	}
-      }
-
-      if ( from ) {
-	var pred = parsePred(decodeURIComponent(from));
-
-	if ( pred ) {
-	  $(ev.target).closest("#ajaxModal").modal('hide');
-	  $(".swish-event-receiver").trigger("pldoc", pred);
-	  ev.preventDefault();
-
-	  return true;
-	}
-      }
-
-      return false;
-    },
-
-    /**
-     * Run a link that refers to a cell. Such a link has a
-     * `data-query=name` attribute and optionally a number of
-     * `data-Var=Value` attributes. Because attributes are
-     * case-insensitive, `Var` is matched case-insensitive against
-     * variables from the query.
-     */
-    runQueryLink: function(a, ev) {
-      var nb    = a.closest(".notebook");
-      var qname = a.data("query");
-      var cell  = nb.find('.nb-cell[name="'+qname+'"]');
-
-      if ( cell ) {
-	var vars = $().prologEditor('variables', cell.nbCell('text'), true);
-	var bindings = "";
-	var options  = {};
-	var novars   = [];
-
-	function isVar(k) {
-	  for(var i=0; i<vars.length; i++) {
-	    if ( vars[i].toLowerCase() == k.toLowerCase() )
-	      return vars[i];
-	  }
-	  novars.push(k);
-	}
-
-	$.each(a.data(), function(k, v) {
-	  var vr;
-
-	  if ( k !== 'query' && (vr=isVar(k)) ) {
-	    if ( bindings != "" )
-	      bindings += ", ";
-	    bindings += vr + " = (" + v + ")";
-	  }
-	});
-
-	if ( novars.length > 0 ) {
-	  modal.feedback({
-	    owner:    nb,
-	    type:     "warning",
-	    duration: 3000,
-	    html:     "The variables <b>" + novars.join(", ") + "</b> do not appear in " +
-		      "query <b>" + qname + "</b>"
-	  });
-	}
-
-	if ( bindings != "" )
-          options.bindings = bindings;
-
-	cell.nbCell('run', options);
-      }
-    },
-
-    /**
-     * Follow a link from a markdown or HTML cell. This recognises links
-     * to internal SWISH objects and handles them using AJAX calls
-     * rather then opening a new page.  If the link is not recognised,
-     * it is opened on a new tab/page.  Recognised:
-     *
-     *  - class="store" links open a gitty store element in a tab
-     *  - class="file" links opens a file in a tab
-     *  - PlDoc links creates a modal dialog holding the documentation
-     *  - data-query=<query-name> runs a query.  data-<Var>=<Value>
-     *    binds variables.
-     *
-     * @param {Event} ev is the event to follow form
-     */
-    followLink: function(ev) {
-      var a = $(ev.target).closest("a");
-      var done = false;
-
-      function accept() {
-	done = true;
-	ev.preventDefault();
-
-	$(ev.target).closest("#ajaxModal").modal('hide');
-      }
-
-      if ( a.attr("href") ) {
-	var swishStore    = config.http.locations.swish + "p/";
-	var swishExamples = config.http.locations.swish + "example/";
-	var href	  = a.attr("href");
-	var modal;
-
-	if ( href.startsWith(swishStore) && !href.match(/#/) ) {
-	  accept();
-	  file = href.slice(swishStore.length);
-	  $(ev.target).closest(".swish").swish('playFile', file);
-	} else if ( a.hasClass("store") ) {
-	  accept();
-	  modal.alert("File does not appear to come from gitty store?");
-	} else if ( a.hasClass("file") ||
-		    (href.startsWith(swishExamples) && !href.match(/#/)) ) {
-	  accept();
-	  $(ev.target).closest(".swish")
-		      .swish('playURL', {url: href});
-	} else if ( a.hasClass("builtin") && href.match(/predicate=/) ) {
-	  done = functions.PlDoc(href.split("predicate=").pop(), ev);
-	} else if ( href.match(/object=/) ) {
-	  done = functions.PlDoc(href.split("object=").pop(), ev);
-	} else if ( (modal=$(ev.target).closest("#ajaxModal")).length == 1 &&
-		    href.match(/#/) )
-	{ var id = href.split("#").pop();
-	  var target;
-
-	  if ( (target=modal.find("#"+id)).length == 1 )
-	  { done = true;
-	    ev.preventDefault();
-	    modal.animate({scrollTop: target.position().top}, 2000);
-	  }
-	}
-
-	if ( !done ) {
-	  ev.preventDefault();
-	  window.open(href, '_blank');
-	}
-      } else if ( a.data("query") ) {
-	functions.runQueryLink(a, ev);
-      }
-    }
-  }
-
-  return functions;
-});
-
-/*  Part of SWISH
-
-    Author:        Jan Wielemaker
-    E-mail:        J.Wielemaker@cs.vu.nl
-    WWW:           http://www.swi-prolog.org
-    Copyright (C): 2014-2018, VU University Amsterdam
-			      CWI Amsterdam
-    All rights reserved.
-
-    Redistribution and use in source and binary forms, with or without
-    modification, are permitted provided that the following conditions
-    are met:
-
-    1. Redistributions of source code must retain the above copyright
-       notice, this list of conditions and the following disclaimer.
-
-    2. Redistributions in binary form must reproduce the above copyright
-       notice, this list of conditions and the following disclaimer in
-       the documentation and/or other materials provided with the
-       distribution.
-
-    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-    "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-    LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
-    FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
-    COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
-    INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
-    BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
-    LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
-    CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-    LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
-    ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
-    POSSIBILITY OF SUCH DAMAGE.
-*/
-
-/**
- * @fileOverview
- *
- * Small utilities
- *
- * @version 0.2.0
- * @author Jan Wielemaker, J.Wielemaker@vu.nl
- */
-
-define('utils',["jquery"],
-       function($) {
-
-  var styles_loaded = [];
-
-  var utils = {
-    /**
-     * @param   {String} text is the text to be encoded
-     * @returns {String} HTML encoded version of text
-     */
-    htmlEncode: function(text) {
-      if ( !text ) return "";
-      return document.createElement('a')
-                     .appendChild(document.createTextNode(text))
-		     .parentNode
-		     .innerHTML;
-    },
-
-    /**
-     * @param {String} url is the style sheet to load
-     */
-    loadCSS(url) {
-      if ( styles_loaded.indexOf(url) == -1 ) {
-	var styles = document.createElement('link');
-	styles.rel = 'stylesheet';
-	styles.type = 'text/css';
-	styles.media = 'screen';
-	styles.href = url;
-	document.getElementsByTagName('head')[0].appendChild(styles);
-	styles_loaded.push(url);
-      }
-    },
-
-    /**
-     * @returns {String} (random) UUID
-     */
-    generateUUID: function() {
-      var d = new Date().getTime();
-      var uuid = 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'
-	.replace(/[xy]/g, function(c) {
-	  var r = (d + Math.random()*16)%16 | 0;
-	  d = Math.floor(d/16);
-	  return (c=='x' ? r : (r&0x7|0x8)).toString(16);
-	});
-      return uuid;
-    },
-
-    flash: function(obj) {
-      obj.addClass("flash");
-      setTimeout(function() { obj.removeClass("flash"); }, 1500);
-    },
-
-    ago: function(time) {
-      var ago = ((new Date().getTime())/1000) - time;
-
-      if ( ago < 20  ) return "just now";
-      if ( ago < 60  ) return "less then a minute ago";
-      ago = Math.round(ago/60);
-      if ( ago < 120 ) return ago + " minutes ago";
-      ago = Math.round(ago/60);
-      if ( ago < 48 )  return ago + " hours ago";
-      ago = Math.round(ago/24);
-      if ( ago < 360 ) return ago + " days ago";
-      ago = Math.round(ago/365);
-      return ago + " years ago";
-    },
-
-    basename: function(path) {
-      return path ? path.split('/').pop() : null;
-    }
-  } // end of methods
-
-  if (typeof String.prototype.startsWith != 'function') {
-    String.prototype.startsWith = function(str) {
-      return this.lastIndexOf(str, 0) === 0;
-    };
-  }
-
-  return utils;
-});
-
-// Laconic simplifies the generation of DOM content.
-(function(context) {
-
-  // properly-cased attribute names for IE setAttribute support
-  var attributeMap = {
-    'acceptcharset'     : 'acceptCharset',
-    'accesskey'         : 'accessKey',
-    'allowtransparency' : 'allowTransparency',
-    'bgcolor'           : 'bgColor',
-    'cellpadding'       : 'cellPadding',
-    'cellspacing'       : 'cellSpacing',
-    'class'             : 'className',
-    'classname'         : 'className',
-    'colspan'           : 'colSpan',
-    'csstext'           : 'style',
-    'defaultchecked'    : 'defaultChecked',
-    'defaultselected'   : 'defaultSelected',
-    'defaultvalue'      : 'defaultValue',
-    'for'               : 'htmlFor',
-    'frameborder'       : 'frameBorder',
-    'hspace'            : 'hSpace',
-    'htmlfor'           : 'htmlFor',
-    'longdesc'          : 'longDesc',
-    'maxlength'         : 'maxLength',
-    'marginwidth'       : 'marginWidth',
-    'marginheight'      : 'marginHeight',
-    'noresize'          : 'noResize',
-    'noshade'           : 'noShade',
-    'readonly'          : 'readOnly',
-    'rowspan'           : 'rowSpan',
-    'tabindex'          : 'tabIndex',
-    'valign'            : 'vAlign',
-    'vspace'            : 'vSpace'
-  };
-
-  // The laconic function serves as a generic method for generating
-  // DOM content, and also as a placeholder for helper functions.
-  //
-  // The first parameter MUST be a string specifying the element's 
-  // tag name.  
-  // 
-  // An optional object of element attributs may follow directly 
-  // after the tag name.  
-  // 
-  // Additional arguments will be considered children of the new 
-  // element and may consist of elements, strings, or numbers.
-  // 
-  // for example:
-  // laconic('div', {'class' : 'foo'}, 'bar');
-  function laconic() {
-
-    // create a new element of the requested type
-    var el = document.createElement(arguments[0]);
-    
-    // walk through the rest of the arguments
-    for(var i=1; i<arguments.length; i++) {
-      var arg = arguments[i];
-      if(arg === null || arg === undefined) continue;
-
-      // if the argument is a dom node, we simply append it
-      if(arg.nodeType === 1) {
-        el.appendChild(arg); 
-      }
-
-      // if the argument is a string or a number, we append it as
-      // a new text node
-      else if(
-          (!!(arg === '' || (arg && arg.charCodeAt && arg.substr))) ||
-          (!!(arg === 0  || (arg && arg.toExponential && arg.toFixed)))) {
-
-        el.appendChild(document.createTextNode(arg));
-      }
-
-      // if the argument is a plain-old object, and we're processing the first 
-      // argument, then we apply the object's values as element attributes
-      else if(i === 1 && typeof(arg) === 'object') {
-        for(var key in arg) {
-          if(arg.hasOwnProperty(key)) {
-            var value = arg[key];
-            if(value !== null && value !== undefined) {
-              key = key.toLowerCase();
-              key = attributeMap[key] || key;
-
-              // if the key represents an event (onclick, onchange, etc)
-              // we'll set the href to '#' if none is given, and we'll apply
-              // the attribute directly to the element for IE7 support.
-              var isEvent = key.charAt(0) === 'o' && key.charAt(1) === 'n';
-              if(isEvent) {
-                if(arg.href === undefined && key === 'onclick') {
-                  el.setAttribute('href', '#');
-                }
-                el[key] = value;
-              }
-
-              // if we're setting the style attribute, we may need to 
-              // use the cssText property
-              else if(key === 'style' && el.style.setAttribute) {
-                el.style.setAttribute('cssText', value);
-              }
-
-              // if we're setting an attribute that's not properly supported 
-              // by IE7's setAttribute implementation, then we apply the 
-              // attribute directly to the element
-              else if(key === 'className' || key === 'htmlFor') {
-                el[key] = value;
-              }
-
-              // otherwise, we use the standard setAttribute
-              else {
-                el.setAttribute(key, value);
-              }
-            }
-          }
-        }
-      }
-
-      // if the argument is an array, we append each element
-      else if(Object.prototype.toString.call(arg) === '[object Array]') {
-        for(var j=0; j<arg.length; j++) {
-          var child = arg[j];
-          if(child.nodeType === 1) {
-            el.appendChild(child);
-          }
-        }
-      }
-    }
-
-    // Add an appendTo method to the newly created element, which will allow
-    // the DOM insertion to be method chained to the creation.  For example:
-    // $el.div('foo').appendTo(document.body);
-    el.appendTo = function(parentNode) {
-      if(parentNode.nodeType === 1 && this.nodeType === 1) {
-        parentNode.appendChild(this);
-      }
-      return this;
-    };
-    
-    return el;
-  }
-
-  // registers a new 'tag' that can be used to automate
-  // the creation of a known element hierarchy
-  laconic.registerElement= function(name, renderer) {
-    if(!laconic[name]) {
-      laconic[name] = function() {
-        var el = laconic('div', {'class' : name});
-        renderer.apply(el, Array.prototype.slice.call(arguments));
-        return el;
-      };
-    }
-  };
-
-  // html 4 tags 
-  var deprecatedTags = ['acronym', 'applet', 'basefont', 'big', 'center', 'dir',
-    'font', 'frame', 'frameset', 'noframes', 'strike', 'tt', 'u', 'xmp'];
-
-  // html 5 tags
-  var tags = ['a', 'abbr', 'address', 'area', 'article', 'aside', 'audio', 'b',
-    'base', 'bdo', 'blockquote', 'body', 'br', 'button', 'canvas', 'caption',
-    'cite', 'code', 'col', 'colgroup', 'command', 'datalist', 'dd', 'del',
-    'details', 'dfn', 'div', 'dl', 'dt', 'em', 'embed', 'fieldset',
-    'figcaption', 'figure', 'footer', 'form', 'h1', 'h2', 'h3', 'h4', 'h5',
-    'h6', 'head', 'header', 'hgroup', 'hr', 'html', 'i', 'iframe', 'img',
-    'input', 'ins', 'keygen', 'kbd', 'label', 'legend', 'li', 'link', 'map',
-    'mark', 'menu', 'meta', 'meter', 'nav', 'noscript', 'object', 'ol',
-    'optgroup', 'option', 'output', 'p', 'picture', 'param', 'pre', 'progress', 
-    'q', 'rp', 'rt', 'ruby', 's', 'samp', 'script', 'section', 'select', 
-    'small', 'source', 'span', 'strong', 'style', 'sub', 'summary', 'sup', 
-    'table', 'tbody', 'td', 'textarea', 'tfoot', 'th', 'thead', 'time', 'title',
-    'tr', 'ul', 'var', 'video', 'wbr'].concat(deprecatedTags);
-
-  // add our tag methods to the laconic object 
-  var makeApply = function(tagName) {
-    return function() {
-      return laconic.apply(this, 
-        [tagName].concat(Array.prototype.slice.call(arguments)));
-    };
-  };
-
-  for(var i=0; i<tags.length; i++) {
-    laconic[tags[i]] = makeApply(tags[i]);
-  }
-
-  // If we're in a CommonJS environment, we export our laconic methods
-  if(typeof module !== 'undefined' && module.exports) {
-    module.exports = laconic;
-  } 
-
-  // otherwise, we attach them to the top level $.el namespace
-  else {
-    var dollar = context.$ || {};
-    dollar.el = laconic;
-    context.$ = dollar;
-  }
-}(this));
-
-define("laconic", ["jquery"], function(){});
-
-/*  Part of SWISH
-
-    Author:        Jan Wielemaker
-    E-mail:        J.Wielemaker@cs.vu.nl
-    WWW:           http://www.swi-prolog.org
-    Copyright (C): 2018, VU University Amsterdam
-			 CWI Amsterdam
-    All rights reserved.
-
-    Redistribution and use in source and binary forms, with or without
-    modification, are permitted provided that the following conditions
-    are met:
-
-    1. Redistributions of source code must retain the above copyright
-       notice, this list of conditions and the following disclaimer.
-
-    2. Redistributions in binary form must reproduce the above copyright
-       notice, this list of conditions and the following disclaimer in
-       the documentation and/or other materials provided with the
-       distribution.
-
-    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-    "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-    LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
-    FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
-    COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
-    INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
-    BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
-    LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
-    CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-    LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
-    ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
-    POSSIBILITY OF SUCH DAMAGE.
-*/
-
-/**
- * @fileOverview
- * Provide version and release info
- *
- * @version 0.2.0
- * @author Jan Wielemaker, J.Wielemaker@vu.nl
- * @requires jquery
- */
-
-define('version',[ "jquery", "config", "utils", "laconic" ],
-       function($, config, utils) {
-
-(function($) {
-  var pluginName = 'version';
-
-  /** @lends $.fn.version */
-  var methods = {
-    _init: function(options) {
-      options = options||{};
-
-      return this.each(function() {
-	var elem = $(this);
-	var data = {};			/* private data */
-
-	if ( config.http.locations.versions ) {
-	  elem.append($.el.div({class:"version"},
-			       $.el.div({class:"v-swish"}),
-			       $.el.div({class:"v-changelog"},
-					$.el.table()),
-			       $.el.div({class:"v-prolog"})));
-
-	  elem[pluginName]('update');
-	  if ( options.commit )
-	    elem[pluginName]('changelog', options);
-	}
-
-	elem.data(pluginName, data);	/* store with element */
-      });
-    },
-
-    /**
-     * Update the SWISH and Prolog versions.
-     */
-    update: function() {
-      if ( config.http.locations.versions ) {
-	elem = this;
-
-	$.get(config.http.locations.versions,
-	      function(data) {
-		if ( !data.swish || !data.prolog ) {
-		  console.log(data);
-		  return;
-		}
-
-		var swishversion;
-
-		if ( elem.hasClass("v-compact") )
-		  swishversion = $.el.a({title: "View recent changes"},
-					data.swish.version);
-		else
-		  swishversion = $.el.span(data.swish.version);
-
-		elem.find(".v-swish")
-		    .append($.el.span($.el.a({class:"v-product",
-					      href:"https://swish.swi-prolog.org"},
-					     "SWISH"),
-				      " version ",
-				      swishversion));
-		elem.find(".v-prolog")
-		    .append($.el.span("Running on ",
-				      $.el.a({class:"v-product",
-					      href:"http://www.swi-prolog.org/"},
-					     data.prolog.brand),
-				      " version " +
-				      data.prolog.version));
-		if ( elem.hasClass("v-compact") ) {
-		  $(swishversion).on("click", function(ev) {
-		    if ( elem.hasClass("v-compact") ) {
-		      elem[pluginName]('versionDetails');
-		      ev.preventDefault();
-		      return false;
-		    }
-		  });
-		}
-	      });
-      }
-    },
-
-    versionDetails: function() {
-      var body = this.closest(".modal-body");
-
-      if ( body ) {
-	this.closest(".modal-content").find("h2").html("SWISH ChangeLog");
-
-	this.detach();
-	body.empty();
-	body.append(this);
-	this.removeClass("v-compact");
-	this[pluginName]('changelog');
-      }
-    },
-
-    /**
-     * Get a changelog
-     */
-    changelog: function(options) {
-      var that = this;
-      options = options||{};
-      var params = {};
-
-      params.show = options.show || "all";
-      if ( options.commit ) {
-	params.commit = options.commit;
-      } else {
-	params.last = options.last || 20;
-      }
-
-      this.find(".v-changelog > table").html("");
-      $.get(config.http.locations.changelog,
-	    params,
-	    function(data) {
-
-	      for(var i=0; i<data.changelog.length; i++) {
-		that[pluginName]('addChange', data.changelog[i], i);
-	      }
-	    });
-    },
-
-    addChange: function(ch, i) {
-      var desc = $.el.td({class:"v-description", colspan:3});
-      $(desc).html(ch.message);
-
-      var cls = (i%2 == 0 ? "even" : "odd");
-
-      this.find(".v-changelog > table")
-	  .append($.el.tr({class:"v-change-header "+cls},
-			  $.el.td({class:"v-author"}, ch.author),
-			  $.el.td({class:"v-commit"}, ch.commit.slice(0,7)),
-			  $.el.td({class:"v-date"}, ch.committer_date_relative)),
-		  $.el.tr({class:"v-change-body "+cls},
-			  desc));
-    },
-
-    /**
-     * Check whether the server was updated since the last time we
-     * viewed the changes.
-     */
-    checkForUpdates: function() {
-      if ( !config.http.locations.versions )
-	return;
-
-      var str = localStorage.getItem("last-version");
-
-      function saveCheckpoint(data) {
-	var last = { commit:data.commit, date: data.date };
-	localStorage.setItem("last-version", JSON.stringify(last));
-      }
-
-      if ( str && (last = JSON.parse(str)) && last.commit ) {
-	var title = "SWISH updates since " + utils.ago(last.date||0);
-
-	$.get(config.http.locations.changes,
-	      {commit:last.commit},
-	      function(data) {
-		if ( data.changes ) {
-		  $("#swish-updates")
-		    .css("display", "inline-block")
-		    .attr("title", "SWISH has received " +
-				   data.changes + " updates\n" +
-			           "Click for details")
-		    .on("click", function(ev) {
-		      $(ev.target).closest(".swish")
-			          .swish('showUpdates',
-					 { title:  title,
-					   commit: last.commit,
-					   show:   "tagged"
-					 });
-		      saveCheckpoint(data);
-		      $("#swish-updates").hide();
-		    });
-		}
-	      });
-      } else {
-	$.get(config.http.locations.changes,
-	      function(data) {
-		saveCheckpoint(data);
-	      });
-      }
-    }
-  }; // methods
-
-  /**
-   * <Class description>
-   *
-   * @class version
-   * @tutorial jquery-doc
-   * @memberOf $.fn
-   * @param {String|Object} [method] Either a method name or the jQuery
-   * plugin initialization object.
-   * @param [...] Zero or more arguments passed to the jQuery `method`
-   */
-
-  $.fn.version = function(method) {
-    if ( methods[method] ) {
-      return methods[method]
-	.apply(this, Array.prototype.slice.call(arguments, 1));
-    } else if ( typeof method === 'object' || !method ) {
-      return methods._init.apply(this, arguments);
-    } else {
-      $.error('Method ' + method + ' does not exist on jQuery.' + pluginName);
-    }
-  };
-}(jQuery));
-});
-
-/*!
- * Bootstrap v3.3.7 (http://getbootstrap.com)
- * Copyright 2011-2016 Twitter, Inc.
- * Licensed under the MIT license
- */
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n=h,o=this.getPosition(this.$viewport);h="bottom"==h&&k.bottom+m>o.bottom?"top":"top"==h&&k.top-m<o.top?"bottom":"right"==h&&k.right+l>o.width?"left":"left"==h&&k.left-l<o.left?"right":h,f.removeClass(n).addClass(h)}var p=this.getCalculatedOffset(h,k,l,m);this.applyPlacement(p,h);var q=function(){var a=e.hoverState;e.$element.trigger("shown.bs."+e.type),e.hoverState=null,"out"==a&&e.leave(e)};a.support.transition&&this.$tip.hasClass("fade")?f.one("bsTransitionEnd",q).emulateTransitionEnd(c.TRANSITION_DURATION):q()}},c.prototype.applyPlacement=function(b,c){var d=this.tip(),e=d[0].offsetWidth,f=d[0].offsetHeight,g=parseInt(d.css("margin-top"),10),h=parseInt(d.css("margin-left"),10);isNaN(g)&&(g=0),isNaN(h)&&(h=0),b.top+=g,b.left+=h,a.offset.setOffset(d[0],a.extend({using:function(a){d.css({top:Math.round(a.top),left:Math.round(a.left)})}},b),0),d.addClass("in");var i=d[0].offsetWidth,j=d[0].offsetHeight;"top"==c&&j!=f&&(b.top=b.top+f-j);var k=this.getViewportAdjustedDelta(c,b,i,j);k.left?b.left+=k.left:b.top+=k.top;var l=/top|bottom/.test(c),m=l?2*k.left-e+i:2*k.top-f+j,n=l?"offsetWidth":"offsetHeight";d.offset(b),this.replaceArrow(m,d[0][n],l)},c.prototype.replaceArrow=function(a,b,c){this.arrow().css(c?"left":"top",50*(1-a/b)+"%").css(c?"top":"left","")},c.prototype.setContent=function(){var a=this.tip(),b=this.getTitle();a.find(".tooltip-inner")[this.options.html?"html":"text"](b),a.removeClass("fade in top bottom left right")},c.prototype.hide=function(b){function d(){"in"!=e.hoverState&&f.detach(),e.$element&&e.$element.removeAttr("aria-describedby").trigger("hidden.bs."+e.type),b&&b()}var e=this,f=a(this.$tip),g=a.Event("hide.bs."+this.type);if(this.$element.trigger(g),!g.isDefaultPrevented())return f.removeClass("in"),a.support.transition&&f.hasClass("fade")?f.one("bsTransitionEnd",d).emulateTransitionEnd(c.TRANSITION_DURATION):d(),this.hoverState=null,this},c.prototype.fixTitle=function(){var a=this.$element;(a.attr("title")||"string"!=typeof a.attr("data-original-title"))&&a.attr("data-original-title",a.attr("title")||"").attr("title","")},c.prototype.hasContent=function(){return this.getTitle()},c.prototype.getPosition=function(b){b=b||this.$element;var c=b[0],d="BODY"==c.tagName,e=c.getBoundingClientRect();null==e.width&&(e=a.extend({},e,{width:e.right-e.left,height:e.bottom-e.top}));var f=window.SVGElement&&c instanceof window.SVGElement,g=d?{top:0,left:0}:f?null:b.offset(),h={scroll:d?document.documentElement.scrollTop||document.body.scrollTop:b.scrollTop()},i=d?{width:a(window).width(),height:a(window).height()}:null;return a.extend({},e,h,i,g)},c.prototype.getCalculatedOffset=function(a,b,c,d){return"bottom"==a?{top:b.top+b.height,left:b.left+b.width/2-c/2}:"top"==a?{top:b.top-d,left:b.left+b.width/2-c/2}:"left"==a?{top:b.top+b.height/2-d/2,left:b.left-c}:{top:b.top+b.height/2-d/2,left:b.left+b.width}},c.prototype.getViewportAdjustedDelta=function(a,b,c,d){var e={top:0,left:0};if(!this.$viewport)return e;var f=this.options.viewport&&this.options.viewport.padding||0,g=this.getPosition(this.$viewport);if(/right|left/.test(a)){var h=b.top-f-g.scroll,i=b.top+f-g.scroll+d;h<g.top?e.top=g.top-h:i>g.top+g.height&&(e.top=g.top+g.height-i)}else{var j=b.left-f,k=b.left+f+c;j<g.left?e.left=g.left-j:k>g.right&&(e.left=g.left+g.width-k)}return e},c.prototype.getTitle=function(){var a,b=this.$element,c=this.options;return a=b.attr("data-original-title")||("function"==typeof c.title?c.title.call(b[0]):c.title)},c.prototype.getUID=function(a){do a+=~~(1e6*Math.random());while(document.getElementById(a));return a},c.prototype.tip=function(){if(!this.$tip&&(this.$tip=a(this.options.template),1!=this.$tip.length))throw new Error(this.type+" `template` option must consist of exactly 1 top-level element!");return this.$tip},c.prototype.arrow=function(){return 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d=a(this),e=d.data("bs.scrollspy"),f="object"==typeof c&&c;e||d.data("bs.scrollspy",e=new b(this,f)),"string"==typeof c&&e[c]()})}b.VERSION="3.3.7",b.DEFAULTS={offset:10},b.prototype.getScrollHeight=function(){return this.$scrollElement[0].scrollHeight||Math.max(this.$body[0].scrollHeight,document.documentElement.scrollHeight)},b.prototype.refresh=function(){var b=this,c="offset",d=0;this.offsets=[],this.targets=[],this.scrollHeight=this.getScrollHeight(),a.isWindow(this.$scrollElement[0])||(c="position",d=this.$scrollElement.scrollTop()),this.$body.find(this.selector).map(function(){var b=a(this),e=b.data("target")||b.attr("href"),f=/^#./.test(e)&&a(e);return f&&f.length&&f.is(":visible")&&[[f[c]().top+d,e]]||null}).sort(function(a,b){return a[0]-b[0]}).each(function(){b.offsets.push(this[0]),b.targets.push(this[1])})},b.prototype.process=function(){var a,b=this.$scrollElement.scrollTop()+this.options.offset,c=this.getScrollHeight(),d=this.options.offset+c-this.$scrollElement.height(),e=this.offsets,f=this.targets,g=this.activeTarget;if(this.scrollHeight!=c&&this.refresh(),b>=d)return g!=(a=f[f.length-1])&&this.activate(a);if(g&&b<e[0])return this.activeTarget=null,this.clear();for(a=e.length;a--;)g!=f[a]&&b>=e[a]&&(void 0===e[a+1]||b<e[a+1])&&this.activate(f[a])},b.prototype.activate=function(b){
-this.activeTarget=b,this.clear();var c=this.selector+'[data-target="'+b+'"],'+this.selector+'[href="'+b+'"]',d=a(c).parents("li").addClass("active");d.parent(".dropdown-menu").length&&(d=d.closest("li.dropdown").addClass("active")),d.trigger("activate.bs.scrollspy")},b.prototype.clear=function(){a(this.selector).parentsUntil(this.options.target,".active").removeClass("active")};var d=a.fn.scrollspy;a.fn.scrollspy=c,a.fn.scrollspy.Constructor=b,a.fn.scrollspy.noConflict=function(){return a.fn.scrollspy=d,this},a(window).on("load.bs.scrollspy.data-api",function(){a('[data-spy="scroll"]').each(function(){var b=a(this);c.call(b,b.data())})})}(jQuery),+function(a){"use strict";function b(b){return this.each(function(){var d=a(this),e=d.data("bs.tab");e||d.data("bs.tab",e=new c(this)),"string"==typeof b&&e[b]()})}var c=function(b){this.element=a(b)};c.VERSION="3.3.7",c.TRANSITION_DURATION=150,c.prototype.show=function(){var b=this.element,c=b.closest("ul:not(.dropdown-menu)"),d=b.data("target");if(d||(d=b.attr("href"),d=d&&d.replace(/.*(?=#[^\s]*$)/,"")),!b.parent("li").hasClass("active")){var e=c.find(".active:last a"),f=a.Event("hide.bs.tab",{relatedTarget:b[0]}),g=a.Event("show.bs.tab",{relatedTarget:e[0]});if(e.trigger(f),b.trigger(g),!g.isDefaultPrevented()&&!f.isDefaultPrevented()){var h=a(d);this.activate(b.closest("li"),c),this.activate(h,h.parent(),function(){e.trigger({type:"hidden.bs.tab",relatedTarget:b[0]}),b.trigger({type:"shown.bs.tab",relatedTarget:e[0]})})}}},c.prototype.activate=function(b,d,e){function f(){g.removeClass("active").find("> .dropdown-menu > .active").removeClass("active").end().find('[data-toggle="tab"]').attr("aria-expanded",!1),b.addClass("active").find('[data-toggle="tab"]').attr("aria-expanded",!0),h?(b[0].offsetWidth,b.addClass("in")):b.removeClass("fade"),b.parent(".dropdown-menu").length&&b.closest("li.dropdown").addClass("active").end().find('[data-toggle="tab"]').attr("aria-expanded",!0),e&&e()}var g=d.find("> .active"),h=e&&a.support.transition&&(g.length&&g.hasClass("fade")||!!d.find("> .fade").length);g.length&&h?g.one("bsTransitionEnd",f).emulateTransitionEnd(c.TRANSITION_DURATION):f(),g.removeClass("in")};var d=a.fn.tab;a.fn.tab=b,a.fn.tab.Constructor=c,a.fn.tab.noConflict=function(){return a.fn.tab=d,this};var e=function(c){c.preventDefault(),b.call(a(this),"show")};a(document).on("click.bs.tab.data-api",'[data-toggle="tab"]',e).on("click.bs.tab.data-api",'[data-toggle="pill"]',e)}(jQuery),+function(a){"use strict";function b(b){return this.each(function(){var d=a(this),e=d.data("bs.affix"),f="object"==typeof b&&b;e||d.data("bs.affix",e=new c(this,f)),"string"==typeof b&&e[b]()})}var c=function(b,d){this.options=a.extend({},c.DEFAULTS,d),this.$target=a(this.options.target).on("scroll.bs.affix.data-api",a.proxy(this.checkPosition,this)).on("click.bs.affix.data-api",a.proxy(this.checkPositionWithEventLoop,this)),this.$element=a(b),this.affixed=null,this.unpin=null,this.pinnedOffset=null,this.checkPosition()};c.VERSION="3.3.7",c.RESET="affix affix-top affix-bottom",c.DEFAULTS={offset:0,target:window},c.prototype.getState=function(a,b,c,d){var e=this.$target.scrollTop(),f=this.$element.offset(),g=this.$target.height();if(null!=c&&"top"==this.affixed)return e<c&&"top";if("bottom"==this.affixed)return null!=c?!(e+this.unpin<=f.top)&&"bottom":!(e+g<=a-d)&&"bottom";var h=null==this.affixed,i=h?e:f.top,j=h?g:b;return null!=c&&e<=c?"top":null!=d&&i+j>=a-d&&"bottom"},c.prototype.getPinnedOffset=function(){if(this.pinnedOffset)return this.pinnedOffset;this.$element.removeClass(c.RESET).addClass("affix");var a=this.$target.scrollTop(),b=this.$element.offset();return this.pinnedOffset=b.top-a},c.prototype.checkPositionWithEventLoop=function(){setTimeout(a.proxy(this.checkPosition,this),1)},c.prototype.checkPosition=function(){if(this.$element.is(":visible")){var b=this.$element.height(),d=this.options.offset,e=d.top,f=d.bottom,g=Math.max(a(document).height(),a(document.body).height());"object"!=typeof d&&(f=e=d),"function"==typeof e&&(e=d.top(this.$element)),"function"==typeof f&&(f=d.bottom(this.$element));var h=this.getState(g,b,e,f);if(this.affixed!=h){null!=this.unpin&&this.$element.css("top","");var i="affix"+(h?"-"+h:""),j=a.Event(i+".bs.affix");if(this.$element.trigger(j),j.isDefaultPrevented())return;this.affixed=h,this.unpin="bottom"==h?this.getPinnedOffset():null,this.$element.removeClass(c.RESET).addClass(i).trigger(i.replace("affix","affixed")+".bs.affix")}"bottom"==h&&this.$element.offset({top:g-b-f})}};var d=a.fn.affix;a.fn.affix=b,a.fn.affix.Constructor=c,a.fn.affix.noConflict=function(){return a.fn.affix=d,this},a(window).on("load",function(){a('[data-spy="affix"]').each(function(){var c=a(this),d=c.data();d.offset=d.offset||{},null!=d.offsetBottom&&(d.offset.bottom=d.offsetBottom),null!=d.offsetTop&&(d.offset.top=d.offsetTop),b.call(c,d)})})}(jQuery);
-define("bootstrap", ["jquery"], function(){});
-
-/*  Part of SWISH
-
-    Author:        Jan Wielemaker
-    E-mail:        J.Wielemaker@cs.vu.nl
-    WWW:           http://www.swi-prolog.org
-    Copyright (C): 2014-2018, VU University Amsterdam
-			      CWI Amsterdam
-    All rights reserved.
-
-    Redistribution and use in source and binary forms, with or without
-    modification, are permitted provided that the following conditions
-    are met:
-
-    1. Redistributions of source code must retain the above copyright
-       notice, this list of conditions and the following disclaimer.
-
-    2. Redistributions in binary form must reproduce the above copyright
-       notice, this list of conditions and the following disclaimer in
-       the documentation and/or other materials provided with the
-       distribution.
-
-    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-    "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-    LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
-    FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
-    COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
-    INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
-    BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
-    LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
-    CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-    LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
-    ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
-    POSSIBILITY OF SUCH DAMAGE.
-*/
-
-/**
- * @fileOverview
- * Show modal windows
- *
- * @version 0.2.0
- * @author Jan Wielemaker, J.Wielemaker@vu.nl
- * @requires jquery
- */
-
-define('modal',[ "jquery", "config", "preferences", "links", "form", "version",
-	 "laconic", "bootstrap" ],
-       function($, config, preferences, links, form) {
-
-/* NOTE: form dependency is circular.  Form is initialized later. */
-
-(function($) {
-  var pluginName = 'swishModal';
-
-  /** @lends $.fn.modal */
-  var methods = {
-    /**
-     * Initialize the widget and listen for "help" events.
-     * @param {Object} options currently ignored
-     */
-    _init: function(options) {
-      return this.each(function() {
-	var elem = $(this);
-
-	elem.addClass("swish-event-receiver");
-	elem.on("help", function(ev, data) {
-	  elem.swishModal('showHelp', data);
-	});
-	elem.on("pldoc", function(ev, data) {
-	  elem.swishModal('showPlDoc', data);
-	});
-	elem.on("form", function(ev, data) {
-	  elem.swishModal('showForm', data);
-	});
-	elem.on("dialog", function(ev, data) {
-	  elem.swishModal('show', data);
-	});
-	elem.on("error", function(ev, data) { /* still needed? */
-	  elem.swishModal('show', data);
-	});
-	elem.on("alert", function(ev, str) {
-	  var icon = "<span class='glyphicon glyphicon-warning-sign'></span>";
-	  elem.swishModal('show', {title: icon, body:str});
-	});
-	elem.on("ajaxError", function(ev, jqXHR) {
-	  elem.swishModal('showAjaxError', jqXHR);
-	});
-	elem.on("feedback", function(ev, options) {
-	  elem.swishModal('feedback', options);
-	});
-	elem.on("show", function(ev, options) {
-	  elem.swishModal('show', options);
-	});
-	elem.on("server_form", function(ev, options) {
-	  elem.swishModal('server_form', options);
-	});
-      });
-    },
-
-    /**
-     * Show a help file.  The help file is a normal HTML document.  The
-     * `<title>` element is used for the title, while the `<body>`
-     * carries the content of the help file.
-     * @param {Object} options
-     * @param {String} options.file file help file.
-     * @param {String} options.notagain Identifier to stop this dialog
-     */
-    showHelp: function(options) {
-      var that = this;
-
-      if ( options.notagain && preferences.notagain(options.notagain) )
-	return;
-
-      $.ajax({ url: config.http.locations.help + "/" + options.file,
-	       dataType: "html",
-	       success: function(data) {
-		 var container = $("<div>");
-		 container.html(data);
-		 that.swishModal('show',
-				 $.extend(
-				   { title: container.find("title").text(),
-				     body:  container
-				   }, options));
-	       }
-             });
-    },
-
-    /**
-     * Show a form.  The form is an HTML document.
-     * @param {Object} options
-     * @param {String} options.file file help file.
-     * @param {String} options.notagain Identifier to stop this dialog
-     */
-    showForm: function(options) {
-      var that = this;
-
-      $.ajax({ url: config.http.locations.form + "/" + options.file,
-	       dataType: "html",
-	       success: function(data) {
-		 var container = $("<div>");
-		 container.html(data);
-		 that.swishModal('show',
-				 $.extend(
-				   { title: container.find("legend").text(),
-				     body:  container
-				   }, options));
-	       }
-             });
-    },
-
-    /** Show PlDoc manual page
-     * @param {Object} options
-     * @param {String} options.name is the name of the predicate to show
-     * @param {String} options.arity arity of the predicate
-     * @param {String} [options.module] module of the predicate
-     */
-    showPlDoc: function(options) {
-      function docURL(options) {
-	var term = "("+options.name+")/"+options.arity;
-	if ( options.module )			/* FIXME: must be valid Prolog term */
-	  term = options.module+":"+term;
-	return   config.http.locations.pldoc_doc_for
-	       + "?header=false&object="
-	       + encodeURIComponent(term);
-      }
-
-      function docBody(content, url) {
-	content.parents("div.modal-dialog").addClass("swish-embedded-manual");
-	return "<iframe class='swish-embedded-manual' " +
-		       "onload='javascript:resizeIframe(this);' " +
-                       "src='"+url+"'>" +
-	       "</iframe>";
-      }
-
-      var data = { title: "SWI-Prolog manual",
-                   body:  function() {
-		     return docBody(this, docURL(options))
-		   }
-                 };
-
-      return this.swishModal('show', data);
-    },
-
-    /**
-     * Show a modal dialog.
-     * @param {Object} options
-     * @param {String} options.title HTML rendered as title
-     * @param {String|function} options.body  If this is a string the
-     * content is set using `$.html()`, else the function is called,
-     * where `this` refers to the jQuery content element and the
-     * function result is added to the content using `$.append()`.
-     * @param {String} options.notagain Identifier to stop this dialog
-     * showing
-     * @param {function} [options.onclose] If present, call this
-     * function if the modal window is closed.
-     */
-    show: function(options) {
-      var content = $.el.div({class:"modal-body"});
-      var title   = $.el.h2();
-      var md      = $.el.div({class:"modal-content"},
-			     $.el.div({class:"modal-header"},
-				      notAgain(options),
-				      closeButton(),
-				      title),
-			     content);
-      var modalel = $.el.div({class:"modal fade", id:"ajaxModal",
-			      tabindex:-1, role:"dialog"
-			     },
-			     $.el.div({class:"modal-dialog"},
-				      md));
-      if ( options.notagain && preferences.persistent() ) {
-	$(md).append($.el.div(
-	  {class:"modal-footer"},
-	  notAgain(options)));
-      }
-      content = $(content);
-      if ( typeof(options.body) == "function" ) {
-	var c = options.body.call(content);
-	if ( c )
-	  content.append(c);
-      } else {
-	content.html(options.body);
-      }
-      $(title).html(options.title);
-      $(modalel).modal({show: true})
-		.on("click", "a", links.followLink)
-	        .on("shown.bs.modal", function() {
-		   initTagsManagers();
-		   // FIXME: should find a more structured way?
-		   $(this).find(".swish-versions").version();
-		 })
-	        .on("hidden.bs.modal", function() {
-		  if ( options.onclose )
-		    options.onclose();
-		  saveNotagain($(this));
-		  $(this).remove();
-		});
-
-      return this
-    },
-
-    /**
-     * Show a server-generated form and act on the buttons.
-     * @arg {Object} options
-     * @arg {String} options.url is the URL that generates the form
-     * content
-     * @arg {String} options.title sets the title of the form.
-     * @arg {Function} options.onreply is called after the form has
-     * been submitted.  `this` points at the submitting button and
-     * the first argument contains the server reply.
-     */
-
-    server_form: function(options) {
-      var modalel = $(this);
-
-      if ( form === undefined )			/* circular dependency */
-	form = require("form");
-
-      return this.swishModal('show', {
-	title: options.title,
-	body: function() {
-	  elem = $(this);
-	  $.ajax({ url: options.url,
-		   data: options.data,
-		   success: function(data) {
-		     elem.append(data);
-		   },
-		   error: function(jqXHDR) {
-		     modalel.swishModal('showAjaxError', jqXHDR);
-		   }
-	         });
-
-	  elem.on("click", "button[data-action]", function(ev) {
-	    var formel = $(ev.target).closest("form");
-	    var data   = form.serializeAsObject(formel, true);
-	    var button = $(ev.target).closest("button");
-
-	    if ( button.data("form_data") == false ) {
-	      $.ajax({ url: button.data("action"),
-	               success: function(obj) {
-			 button.closest(".modal").modal('hide');
-			 if ( options.onreply )
-			   options.onreply.call(button[0], obj);
-			 ev.preventDefault();
-			 return false;
-		       },
-		       error: function(jqXHDR) {
-			 modalel.swishModal('showAjaxError', jqXHDR);
-		       }
-	      });
-	    } else {
-	      $.ajax({ url: button.data("action"),
-		       data: JSON.stringify(data),
-		       dataType: "json",
-		       contentType: "application/json",
-		       type: "POST",
-		       success: function(obj) {
-			 if ( obj.status == "success" ) {
-			   button.closest(".modal").modal('hide');
-			   if ( options.onreply )
-			     options.onreply.call(button[0], obj);
-			   ev.preventDefault();
-			   return false;
-			 } else if ( obj.status == "error" ) {
-			   form.formError(formel, obj.error);
-			 } else {
-			   alert("Updated failed: " +
-				 JSON.serializeAsObject(obj));
-			 }
-		       },
-		       error: function(jqXHDR) {
-			 modalel.swishModal('showAjaxError', jqXHDR);
-		       }
-	      });
-	    }
-
-	    ev.preventDefault();
-	    return false;
-	  });
-	}
-      });
-    },
-
-    /**
-     * Display information about an ajax error
-     */
-    showAjaxError: function(jqXHR) {
-      var dom = $.el.div();
-
-      $(dom).html(jqXHR.responseText);
-      var h1 = $(dom).find("h1");
-      var title = h1.text() || "Server error";
-      h1.remove();
-
-      var data = { title: title,
-		   body: dom
-		 };
-
-      this.swishModal('show', data);
-    },
-
-    /**
-     * Display briefly a feedback message
-     * @param {Object} options
-     * @param {String} options.html defines the HTML content that is
-     * rendered.
-     * @param {Number} [options.duration=1500] number of milliseconds
-     * that the message is visible.
-     * @param {Object} [options.owner=$("body")] is the DOM element to
-     * which the feedback window is added.
-     */
-    feedback: function(options) {
-      var win = $.el.div({class:"feedback "+options.type||""});
-      $(win).html(options.html);
-
-      $(options.owner||"body").append(win);
-      setTimeout(function() {
-	$(win).hide(400, function() {
-	  $(win).remove();
-	});
-      }, options.duration||1500);
-      return this;
-    }
-  }; // methods
-
-  function saveNotagain(elem) {
-    if ( !elem.hasClass("modal") )
-      elem = elem.closest(".modal");
-
-    elem.find("[data-notagain]")
-	.each(function() {
-      if ( $(this).prop("checked") ) {
-	preferences.setNotAgain($(this).attr("data-notagain"));
-	return false;
-      }
-    });
-  }
-
-  function closeButton() {
-    var button = $.el.button({ type:"button", class:"close",
-			       "data-dismiss":"modal"
-                             });
-    $(button)
-	.html("&times;")
-	.on("click", function(ev) {
-	  ev.preventDefault();
-	  saveNotagain($(ev.target));
-	});
-
-    return button;
-  }
-
-  function notAgain(options) {
-    if ( options.notagain && preferences.persistent() ) {
-      return $.el.label($.el.input({ type:"checkbox",
-				     'data-notagain':options.notagain,
-				     name:"dismiss"
-				   }),
-			" Don't show again!");
-    } else {
-      return "";
-    }
-  }
-
-  /**
-   * Tags managers must be initialised after the DOM is complete.
-   * This cooperates with `tagInput()` from `form.js`
-   */
-  function initTagsManagers() {
-    var set = $(this).find(".tm-input");
-
-    set.each(function() {
-      var elem = $(this);
-      var tags = elem.data("prefilled");
-      var options = {};
-
-      if ( tags ) options.prefilled = tags;
-
-      elem.tagsManager(options);
-    });
-  }
-
-  /**
-   * See http://stackoverflow.com/questions/9975810/make-iframe-automatically-adjust-height-according-to-the-contents-without-using
-   */
-  window.resizeIframe = function(iframe) {
-    iframe.style.height = 0;
-    iframe.style.height = iframe.contentWindow.document.body.scrollHeight+20
-                          + 'px';
-  }
-
-  /**
-   * This class is a small layer around bootstrap $.modal that isolates
-   * us from bootstrap and provides most of the intermediate divs
-   * needed to create a nice modal window.  In addition, it listens to
-   * `"help"` events.
-   *
-   * @class swishModal
-   * @tutorial jquery-doc
-   * @memberOf $.fn
-   * @param {String|Object} [method] Either a method name or the jQuery
-   * plugin initialization object.
-   * @param [...] Zero or more arguments passed to the jQuery `method`
-   */
-
-  $.fn.swishModal = function(method) {
-    if ( methods[method] ) {
-      return methods[method]
-	.apply(this, Array.prototype.slice.call(arguments, 1));
-    } else if ( typeof method === 'object' || !method ) {
-      return methods._init.apply(this, arguments);
-    } else {
-      $.error('Method ' + method + ' does not exist on jQuery.' + pluginName);
-    }
-  };
-}(jQuery));
-
-  var ntfid = 1;
-
-  return {
-    ajaxError: function(jqXHR) {
-      $(".swish-event-receiver").trigger("ajaxError", jqXHR);
-    },
-    feedback: function(options) {
-      $(".swish-event-receiver").trigger("feedback", options);
-    },
-    alert: function(options) {
-      $(".swish-event-receiver").trigger("alert", options);
-    },
-    help: function(options) {
-      $(".swish-event-receiver").trigger("help", options);
-    },
-    show: function(options) {
-      $(".swish-event-receiver").trigger("show", options);
-    },
-    server_form: function(options) {
-      $(".swish-event-receiver").trigger("server_form", options);
-    },
-
-    /**
-     * Provide a brief notification for an element, typically an
-     * icon or similar object.
-     *
-     * @param {Object} options
-     * @param {String} options.html provides the inner html of the message.
-     * @param {Number} [options.fadeIn=400] provide the fade in time.
-     * @param {Number} [options.fadeOut=400] provide the fade out time.
-     * @param {Number} [options.time=5000] provide the show time.  The
-     * value `0` prevents a timeout.
-     */
-    notify: function(elem, options) {
-      var id = "ntf-"+(options.wsid||ntfid++);
-
-      var div  = $.el.div({ class:"notification notify-arrow",
-			    id:id
-			  });
-      var epos = elem.offset();
-
-      $("body").append(div);
-      if ( options.html )
-	$(div).html(options.html);
-      else if ( options.dom )
-	$(div).append(options.dom);
-
-      $(div).css({ left: epos.left+elem.width()-$(div).outerWidth()+15,
-		   top:  epos.top+elem.height()+12
-		 })
-	    .on("click", function(){$(div).remove();})
-	    .show(options.fadeIn||400);
-
-      if ( options.time !== 0 ) {
-	var time = options.time;
-
-	if ( !time )
-	  time = elem.hasClass("myself") ? 1000 : 5000;
-
-	setTimeout(function() {
-	  $(div).hide(options.fadeOut||400, function() {
-	    $("#"+id).remove();
-	    if ( options.onremove )
-	      options.onremove(options);
-	    elem.chat('unnotify', options.wsid);
-	  });
-	}, time);
-      }
-    }
-  };
-});
-
-
-/* ===================================================
- * tagmanager.js v3.0.1
- * http://welldonethings.com/tags/manager
- * ===================================================
- * Copyright 2012 Max Favilli
- *
- * Licensed under the Mozilla Public License, Version 2.0 You may not use this work except in compliance with the License.
- *
- * http://www.mozilla.org/MPL/2.0/
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- * ========================================================== */
-(function($) {
-
-    "use strict";
-
-    var defaults = {
-        prefilled: null,
-        CapitalizeFirstLetter: false,
-        preventSubmitOnEnter: true,     // deprecated
-        isClearInputOnEsc: true,        // deprecated
-        externalTagId: false,
-        prefillIdFieldName: 'Id',
-        prefillValueFieldName: 'Value',
-        AjaxPush: null,
-        AjaxPushAllTags: null,
-        AjaxPushParameters: null,
-        delimiters: [9, 13, 44],        // tab, enter, comma
-        backspace: [8],
-        maxTags: 0,
-        hiddenTagListName: null,        // deprecated
-        hiddenTagListId: null,          // deprecated
-        replace: true,
-        output: null,
-        deleteTagsOnBackspace: true,    // deprecated
-        tagsContainer: null,
-        tagCloseIcon: 'x',
-        tagClass: '',
-        validator: null,
-        onlyTagList: false,
-        tagList: null,
-        fillInputOnTagRemove: false
-    },
-
-    publicMethods = {
-        pushTag : function (tag, ignoreEvents, externalTagId) {
-            var $self = $(this), opts = $self.data('opts'), alreadyInList, tlisLowerCase, max, tagId,
-            tlis = $self.data("tlis"), tlid = $self.data("tlid"), idx, newTagId, newTagRemoveId, escaped,
-            html, $el, lastTagId, lastTagObj;
-
-            tag = privateMethods.trimTag(tag, opts.delimiterChars);
-
-            if (!tag || tag.length <= 0) { return; }
-
-            // check if restricted only to the tagList suggestions
-            if (opts.onlyTagList && undefined !== opts.tagList ){
-
-                //if the list has been updated by look pushed tag in the tagList. if not found return
-                if (opts.tagList){
-                    var $tagList = opts.tagList;
-
-                    // change each array item to lower case
-                    $.each($tagList, function(index, item) {
-                        $tagList[index] = item.toLowerCase();
-                    });
-                    var suggestion = $.inArray(tag.toLowerCase(), $tagList);
-
-                    if ( -1 === suggestion ) {
-                        //console.log("tag:" + tag + " not in tagList, not adding it");
-                        return;
-                    } 
-                }
-
-            }
-
-            if (opts.CapitalizeFirstLetter && tag.length > 1) {
-                tag = tag.charAt(0).toUpperCase() + tag.slice(1).toLowerCase();
-            }
-
-            // call the validator (if any) and do not let the tag pass if invalid
-            if (opts.validator && !opts.validator(tag)) {
-                $self.trigger('tm:invalid', tag)
-                return;
-            }
-
-            // dont accept new tags beyond the defined maximum
-            if (opts.maxTags > 0 && tlis.length >= opts.maxTags) { return; }
-
-            alreadyInList = false;
-            //use jQuery.map to make this work in IE8 (pure JS map is JS 1.6 but IE8 only supports JS 1.5)
-            tlisLowerCase = jQuery.map(tlis, function(elem) {
-                return elem.toLowerCase();
-            });
-
-            idx = $.inArray(tag.toLowerCase(), tlisLowerCase);
-
-            if (-1 !== idx) {
-                // console.log("tag:" + tag + " !!already in list!!");
-                alreadyInList = true;
-            }
-
-            if (alreadyInList) {
-                $self.trigger('tm:duplicated', tag);
-                if (opts.blinkClass) {
-                    for (var i = 0; i < 6; ++i) {
-                        $("#" + $self.data("tm_rndid") + "_" + tlid[idx]).queue(function(next) {
-                            $(this).toggleClass(opts.blinkClass);
-                            next();
-                        }).delay(100);
-                    }
-                } else {
-                    $("#" + $self.data("tm_rndid") + "_" + tlid[idx]).stop()
-                        .animate({backgroundColor: opts.blinkBGColor_1}, 100)
-                        .animate({backgroundColor: opts.blinkBGColor_2}, 100)
-                        .animate({backgroundColor: opts.blinkBGColor_1}, 100)
-                        .animate({backgroundColor: opts.blinkBGColor_2}, 100)
-                        .animate({backgroundColor: opts.blinkBGColor_1}, 100)
-                        .animate({backgroundColor: opts.blinkBGColor_2}, 100);
-                }
-            } else {
-                if (opts.externalTagId === true) {
-                    if (externalTagId === undefined) {
-                        $.error('externalTagId is not passed for tag -' + tag);
-                    }
-                    tagId = externalTagId;
-                } else {
-                    max = Math.max.apply(null, tlid);
-                    max = max === -Infinity ? 0 : max;
-
-                    tagId = ++max;
-                }
-                if (!ignoreEvents) { $self.trigger('tm:pushing', [tag, tagId]); }
-                tlis.push(tag);
-                tlid.push(tagId);
-
-                if (!ignoreEvents)
-                    if (opts.AjaxPush !== null && opts.AjaxPushAllTags == null) {
-                        if ($.inArray(tag, opts.prefilled) === -1) {
-                            $.post(opts.AjaxPush, $.extend({tag: tag}, opts.AjaxPushParameters));
-                        }
-                    }
-
-                // console.log("tagList: " + tlis);
-
-                newTagId = $self.data("tm_rndid") + '_' + tagId;
-                newTagRemoveId = $self.data("tm_rndid") + '_Remover_' + tagId;
-                escaped = $("<span/>").text(tag).html();
-
-                html = '<span class="' + privateMethods.tagClasses.call($self) + '" id="' + newTagId + '">';
-                html+= '<span>' + escaped + '</span>';
-                html+= '<a href="#" class="tm-tag-remove" id="' + newTagRemoveId + '" TagIdToRemove="' + tagId + '">';
-                html+= opts.tagCloseIcon + '</a></span> ';
-                $el = $(html);
-
-                if (opts.tagsContainer !== null) {
-                    $(opts.tagsContainer).append($el);
-                } else {
-                    if (tlid.length > 1) {
-                        lastTagObj = $self.siblings("#" + $self.data("tm_rndid") + "_" + tlid[tlid.length - 2]);
-                        lastTagObj.after($el);
-                    } else {
-                        $self.before($el);
-                    }
-                }
-
-                $el.find("#" + newTagRemoveId).on("click", $self, function(e) {
-                    e.preventDefault();
-                    var TagIdToRemove = parseInt($(this).attr("TagIdToRemove"));
-                    privateMethods.spliceTag.call($self, TagIdToRemove, e.data);
-                });
-
-                privateMethods.refreshHiddenTagList.call($self);
-
-                if (!ignoreEvents) { $self.trigger('tm:pushed', [tag, tagId]); }
-
-                privateMethods.showOrHide.call($self);
-                //if (tagManagerOptions.maxTags > 0 && tlis.length >= tagManagerOptions.maxTags) {
-                //  obj.hide();
-                //}
-            }
-            $self.val("");
-        },
-
-        popTag : function () {
-            var $self = $(this), tagId, tagBeingRemoved,
-            tlis = $self.data("tlis"),
-            tlid = $self.data("tlid");
-
-            if (tlid.length > 0) {
-              tagId = tlid.pop();
-
-              tagBeingRemoved = tlis[tlis.length - 1];
-              $self.trigger('tm:popping', [tagBeingRemoved, tagId]);
-              tlis.pop();
-
-              // console.log("TagIdToRemove: " + tagId);
-              $("#" + $self.data("tm_rndid") + "_" + tagId).remove();
-              privateMethods.refreshHiddenTagList.call($self);
-              $self.trigger('tm:popped', [tagBeingRemoved, tagId]);
-              // console.log(tlis);
-            }
-        },
-
-        empty : function() {
-            var $self = $(this), tlis = $self.data("tlis"), tlid = $self.data("tlid"), tagId;
-
-            while (tlid.length > 0) {
-                tagId = tlid.pop();
-                tlis.pop();
-                // console.log("TagIdToRemove: " + tagId);
-                $("#" + $self.data("tm_rndid") + "_" + tagId).remove();
-                privateMethods.refreshHiddenTagList.call($self);
-                // console.log(tlis);
-            }
-            $self.trigger('tm:emptied', null);
-
-            privateMethods.showOrHide.call($self);
-            //if (tagManagerOptions.maxTags > 0 && tlis.length < tagManagerOptions.maxTags) {
-            //  obj.show();
-            //}
-        },
-
-        tags : function() {
-            var $self = this, tlis = $self.data("tlis");
-            return tlis;
-        }
-    },
-
-    privateMethods = {
-        showOrHide : function () {
-            var $self = this, opts = $self.data('opts'), tlis = $self.data("tlis");
-
-            if (opts.maxTags > 0 && tlis.length < opts.maxTags) {
-                $self.show();
-                $self.trigger('tm:show');
-            }
-
-            if (opts.maxTags > 0 && tlis.length >= opts.maxTags) {
-                $self.hide();
-                $self.trigger('tm:hide');
-            }
-        },
-
-        tagClasses : function () {
-            var $self = $(this), opts = $self.data('opts'), tagBaseClass = opts.tagBaseClass,
-            inputBaseClass = opts.inputBaseClass, cl;
-            // 1) default class (tm-tag)
-            cl = tagBaseClass;
-            // 2) interpolate from input class: tm-input-xxx --> tm-tag-xxx
-            if ($self.attr('class')) {
-                $.each($self.attr('class').split(' '), function (index, value) {
-                    if (value.indexOf(inputBaseClass + '-') !== -1) {
-                        cl += ' ' + tagBaseClass + value.substring(inputBaseClass.length);
-                    }
-                });
-            }
-            // 3) tags from tagClass option
-            cl += (opts.tagClass ? ' ' + opts.tagClass : '');
-            return cl;
-        },
-
-        trimTag : function (tag, delimiterChars) {
-            var i;
-            tag = $.trim(tag);
-            // truncate at the first delimiter char
-            i = 0;
-            for (i; i < tag.length; i++) {
-                if ($.inArray(tag.charCodeAt(i), delimiterChars) !== -1) { break; }
-            }
-            return tag.substring(0, i);
-        },
-
-        refreshHiddenTagList : function () {
-            var $self = $(this), tlis = $self.data("tlis"), lhiddenTagList = $self.data("lhiddenTagList");
-
-            if (lhiddenTagList) {
-                $(lhiddenTagList).val(tlis.join($self.data('opts').baseDelimiter)).change();
-            }
-
-            $self.trigger('tm:refresh', tlis.join($self.data('opts').baseDelimiter));
-        },
-
-        killEvent : function (e) {
-            e.cancelBubble = true;
-            e.returnValue = false;
-            e.stopPropagation();
-            e.preventDefault();
-        },
-
-        keyInArray : function (e, ary) {
-            return $.inArray(e.which, ary) !== -1;
-        },
-
-        applyDelimiter : function (e) {
-            var $self = $(this);
-            publicMethods.pushTag.call($self,$(this).val());
-            e.preventDefault();
-        },
-
-        prefill: function (pta) {
-            var $self = $(this);
-            var opts = $self.data('opts')
-            $.each(pta, function (key, val) {
-                if (opts.externalTagId === true) {
-                    publicMethods.pushTag.call($self, val[opts.prefillValueFieldName], true, val[opts.prefillIdFieldName]);
-                } else {
-                    publicMethods.pushTag.call($self, val, true);
-                }
-            });
-        },
-
-        pushAllTags : function (e, tag) {
-            var $self = $(this), opts = $self.data('opts'), tlis = $self.data("tlis");
-            if (opts.AjaxPushAllTags) {
-                if (e.type !== 'tm:pushed' || $.inArray(tag, opts.prefilled) === -1) {
-                    $.post(opts.AjaxPush, $.extend({ tags: tlis.join(opts.baseDelimiter) }, opts.AjaxPushParameters));
-                }
-            }
-        },
-
-        spliceTag : function (tagId) {
-            var $self = this, tlis = $self.data("tlis"), tlid = $self.data("tlid"), idx = $.inArray(tagId, tlid),
-            tagBeingRemoved;
-
-            // console.log("TagIdToRemove: " + tagId);
-            // console.log("position: " + idx);
-
-            if (-1 !== idx) {
-                tagBeingRemoved = tlis[idx];
-                $self.trigger('tm:splicing', [tagBeingRemoved, tagId]);
-                $("#" + $self.data("tm_rndid") + "_" + tagId).remove();
-                tlis.splice(idx, 1);
-                tlid.splice(idx, 1);
-                privateMethods.refreshHiddenTagList.call($self);
-                $self.trigger('tm:spliced', [tagBeingRemoved, tagId]);
-                // console.log(tlis);
-            }
-
-            privateMethods.showOrHide.call($self);
-            //if (tagManagerOptions.maxTags > 0 && tlis.length < tagManagerOptions.maxTags) {
-            //  obj.show();
-            //}
-        },
-
-        init : function (options) {
-            var opts = $.extend({}, defaults, options), delimiters, keyNums;
-
-            opts.hiddenTagListName = (opts.hiddenTagListName === null)
-                ? 'hidden-' + this.attr('name')
-                : opts.hiddenTagListName;
-
-            delimiters = opts.delimeters || opts.delimiters; // 'delimeter' is deprecated
-            keyNums = [9, 13, 17, 18, 19, 37, 38, 39, 40]; // delimiter values to be handled as key codes
-            opts.delimiterChars = [];
-            opts.delimiterKeys = [];
-
-            $.each(delimiters, function (i, v) {
-                if ($.inArray(v, keyNums) !== -1) {
-                    opts.delimiterKeys.push(v);
-                } else {
-                    opts.delimiterChars.push(v);
-                }
-            });
-
-            opts.baseDelimiter = String.fromCharCode(opts.delimiterChars[0] || 44);
-            opts.tagBaseClass = 'tm-tag';
-            opts.inputBaseClass = 'tm-input';
-
-            if (!$.isFunction(opts.validator)) { opts.validator = null; }
-
-            this.each(function() {
-                var $self = $(this), hiddenObj ='', rndid ='', albet = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
-
-                // prevent double-initialization of TagManager
-                if ($self.data('tagManager')) { return false; }
-                $self.data('tagManager', true);
-
-                for (var i = 0; i < 5; i++) {
-                  rndid += albet.charAt(Math.floor(Math.random() * albet.length));
-                }
-
-                $self.data("tm_rndid", rndid);
-
-                // store instance-specific data in the DOM object
-                $self.data('opts',opts)
-                    .data('tlis', []) //list of string tags
-                    .data('tlid', []); //list of ID of the string tags
-
-                if (opts.output === null) {
-                    hiddenObj = $('<input/>', {
-                        type: 'hidden',
-                        name: opts.hiddenTagListName
-                    });
-                    $self.after(hiddenObj);
-                    $self.data("lhiddenTagList", hiddenObj);
-                } else {
-                    $self.data("lhiddenTagList", $(opts.output));
-                }
-
-                if (opts.AjaxPushAllTags) {
-                    $self.on('tm:spliced', privateMethods.pushAllTags);
-                    $self.on('tm:popped', privateMethods.pushAllTags);
-                    $self.on('tm:pushed', privateMethods.pushAllTags);
-                }
-
-                // hide popovers on focus and keypress events
-                $self.on('focus keypress', function(e) {
-                    if ($(this).popover) { $(this).popover('hide'); }
-                });
-
-                // handle ESC (keyup used for browser compatibility)
-                if (opts.isClearInputOnEsc) {
-                    $self.on('keyup', function(e) {
-                        if (e.which === 27) {
-                            // console.log('esc detected');
-                            $(this).val('');
-                            privateMethods.killEvent(e);
-                        }
-                    });
-                }
-
-                $self.on('keypress', function(e) {
-                    // push ASCII-based delimiters
-                    if (privateMethods.keyInArray(e, opts.delimiterChars)) {
-                        privateMethods.applyDelimiter.call($self, e);
-                    }
-                });
-
-                $self.on('keydown', function(e) {
-                    // disable ENTER
-                    if (e.which === 13) {
-                        if (opts.preventSubmitOnEnter) {
-                            privateMethods.killEvent(e);
-                        }
-                    }
-
-                    // push key-based delimiters (includes <enter> by default)
-                    if (privateMethods.keyInArray(e, opts.delimiterKeys)) {
-                        privateMethods.applyDelimiter.call($self, e);
-                    }
-                });
-
-                // BACKSPACE (keydown used for browser compatibility)
-                if (opts.deleteTagsOnBackspace) {
-                    $self.on('keydown', function(e) {
-                        if (privateMethods.keyInArray(e, opts.backspace)) {
-                            // console.log("backspace detected");
-                            if ($(this).val().length <= 0) {
-                                publicMethods.popTag.call($self);
-                                privateMethods.killEvent(e);
-                            }
-                        }
-                    });
-                }
-
-                // on tag pop fill back the tag's content to the input field
-                if (opts.fillInputOnTagRemove) {
-                    $self.on('tm:popped', function(e, tag) {
-                        $(this).val(tag);
-                    });
-                }
-
-                $self.change(function(e) {
-                    if (!/webkit/.test(navigator.userAgent.toLowerCase())) {
-                        $self.focus();
-                    } // why?
-
-                    /* unimplemented mode to push tag on blur
-                     else if (tagManagerOptions.pushTagOnBlur) {
-                     console.log('change: pushTagOnBlur ' + tag);
-                     pushTag($(this).val());
-                     } */
-                    privateMethods.killEvent(e);
-                });
-
-                if (opts.prefilled !== null) {
-                    if (typeof (opts.prefilled) === "object") {
-                        privateMethods.prefill.call($self, opts.prefilled);
-                    } else if (typeof (opts.prefilled) === "string") {
-                        privateMethods.prefill.call($self, opts.prefilled.split(opts.baseDelimiter));
-                    } else if (typeof (opts.prefilled) === "function") {
-                        privateMethods.prefill.call($self, opts.prefilled());
-                    }
-                } else if (opts.output !== null) {
-                    if ($(opts.output) && $(opts.output).val()) { var existing_tags = $(opts.output); }
-                    privateMethods.prefill.call($self,$(opts.output).val().split(opts.baseDelimiter));
-                }
-
-            });
-
-            return this;
-        }
-    };
-
-    $.fn.tagsManager = function(method) {
-        var $self = $(this);
-
-        if (!(0 in this)) { return this; }
-
-        if ( publicMethods[method] ) {
-            return publicMethods[method].apply( $self, Array.prototype.slice.call(arguments, 1) );
-        } else if ( typeof method === 'object' || ! method ) {
-            return privateMethods.init.apply( this, arguments );
-        } else {
-            $.error( 'Method ' +  method + ' does not exist.' );
-            return false;
-        }
-    };
-
-}(jQuery));
-
-define("tagmanager", ["jquery"], function(){});
-
-/*  Part of SWISH
-
-    Author:        Jan Wielemaker
-    E-mail:        J.Wielemaker@cs.vu.nl
-    WWW:           http://www.swi-prolog.org
-    Copyright (C): 2014-2017, VU University Amsterdam
-			      CWI Amsterdam
-    All rights reserved.
-
-    Redistribution and use in source and binary forms, with or without
-    modification, are permitted provided that the following conditions
-    are met:
-
-    1. Redistributions of source code must retain the above copyright
-       notice, this list of conditions and the following disclaimer.
-
-    2. Redistributions in binary form must reproduce the above copyright
-       notice, this list of conditions and the following disclaimer in
-       the documentation and/or other materials provided with the
-       distribution.
-
-    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-    "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-    LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
-    FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
-    COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
-    INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
-    BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
-    LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
-    CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-    LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
-    ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
-    POSSIBILITY OF SUCH DAMAGE.
-*/
-
-/**
- * @fileOverview
- *
- * RequireJS module providing some general support methods for handling
- * forms and functions to build Bootstrap forms easily.
- *
- * @version 0.1.0
- * @author Jan Wielemaker, J.Wielemaker@vu.nl
- * @requires jquery
- */
-
-define('form',[ "jquery", "config", "modal", "laconic", "tagmanager" ],
-       function($, config, modal) {
-
-  var LABELWIDTH = 3;
-
-  var form = {
-    /**
-     * Serialize a form as an object. The following normalizations are
-     * performed:
-     *   - Form fields that have an empty string are ignored unless
-     *     `ignore_empty` is `true`
-     *   - The value from a `<input type="checkbox">`is converted
-     *     into a JavaScript boolean.
-     *	 - The value of a tag-list is converted into a list of strings.
-     * @returns {Object} holding the name/value pairs of the form
-     */
-    serializeAsObject: function(form, ignore_empty) {
-      var arr = form.serializeArray();
-      var inset = [];
-      var obj = {};
-
-      // get arrays of checkboxes
-      form.find("div.checkboxes.array").each(function() {
-	var elem = $(this);
-	var set = [];
-
-	elem.find("input:checked").each(function() {
-	  var name = $(this).attr("name");
-	  set.push(name);
-	});
-	elem.find("input").each(function() {
-	  var name = $(this).attr("name");
-	  inset.push(name);
-	});
-
-	obj[elem.attr("name")] = set;
-      });
-
-      for(var i=0; i<arr.length; i++) {
-	var name  = arr[i].name;
-	var value = arr[i].value;
-	var input = form.find('[name="'+name+'"]');
-	var type  = input.prop("type");
-	var jvalue;
-
-	if ( (jvalue = input.data('json-value')) ) {
-	  obj[name] = jvalue;
-	} else if ( value != "" || ignore_empty == true ) {
-	  // deal with tag lists
-	  if ( type == "hidden" && name.indexOf("hidden-") == 0 ) {
-	    name = name.slice("hidden-".length);
-	    if ( obj[name] == undefined ) {
-	      obj[name] = value.split(",");
-	    } else {
-	      obj[name] = value.split(",").concat(obj[name]);
-	    }
-	  } else if ( type == "text" && input.hasClass("tag-list") ) {
-	    if ( value != "" ) {
-	      if ( obj[name] !== undefined )
-		obj[name].push(value);
-	      else
-		obj[name] = [value];
-	    }
-	  } else if ( type == "number" ) {
-	    obj[name] = parseInt(value);
-	  } else if ( type == "checkbox" ) {
-	    if ( inset.indexOf(name) == -1 )
-	      obj[name] = (value == "on" ? true : false);
-	  } else {
-	    obj[name] = value;
-	  }
-	}
-      }
-
-      // unchecked checkboxes are not reported
-      form.find("[type=checkbox]").each(function() {
-	var checkbox = $(this);
-	var name = checkbox.prop('name');
-	if ( checkbox.prop("disabled") != true &&
-	     obj[name] === undefined &&
-	     inset.indexOf(name) == -1 )
-	  obj[name] = false;
-      });
-
-      return obj;
-    },
-
-    /**
-     * Provide feedback about problems with form elements
-     * @param form is the form to decorate
-     * @param error is a pengine error message created by lib/form.pl
-     */
-
-    formError: function(formel, error) {
-      formel.find(".has-error").removeClass("has-error");
-      formel.find(".help-block.with-errors").remove();
-
-      if ( error ) {
-	if ( error.code == "form_error" || error.code == "input_error" ) {
-	  errors = error.data.split("\n");
-	  for(var i=0; i<errors.length; i++) {
-	    var el = errors[i].split(/:\s*(.*)?/);
-
-	    form.fieldError(formel, el[0], el[1]);
-	  }
-	} else
-	{ modal.alert(error.data);
-	}
-      }
-    },
-
-    fieldError: function(form, field, msg) {
-      var input = form.find("input[name="+field+"]");
-
-      if ( input.length > 0 ) {
-	var group = input.closest(".form-group");
-
-	if ( input.parent().hasClass("input-group") )
-	  input = input.parent();
-
-	group.addClass("has-error");
-	input.after($.el.p({class:"help-block with-errors"}, msg));
-      } else
-      { alert("Missing value for "+field);
-      }
-    },
-
-    showDialog: function(data) {
-      $(".swish-event-receiver").trigger("dialog", data);
-    },
-
-    /**
-     * Invoke the central broadcasting of SWISH
-     * @param {String} event is the event name
-     * @param {any} [data] is the associated data
-     */
-    formBroadcast: function(event, data) {
-      $(".swish-event-receiver").trigger(event, data);
-    },
-
-    dyn_clear: function(form, onclear) {
-      form.find('.has-clear input[type="text"]').on('input propertychange',
-						    function() {
-	var $this = $(this);
-	var visible = Boolean($this.val());
-	$this.siblings('.form-control-clear').toggleClass('hidden', !visible);
-      }).trigger('propertychange');
-
-      form.find('.form-control-clear').click(function() {
-	var input = $(this).siblings('input[type="text"]');
-	input.val('').trigger('propertychange').focus();
-	if ( onclear )
-	  onclear.call(input);
-      });
-    },
-
-    fields: {
-      fileName: function(name, public, example, disabled) {
-	var labeltext;
-	var empty = "(leave empty for generated random name)"
-	var fork, input;
-	var community_examples = config.swish.community_examples && example != undefined;
-
-	if ( community_examples )
-	  labeltext = "Public | Example | name";
-	else
-	  labeltext = "Public | name";
-
-        var elem =
-	$.el.div({class:"form-group"},
-		 label("name", labeltext),
-		 $.el.div({class:valgridw()},
-			  $.el.div({class:"input-group"},
-				   $.el.span({class:"input-group-addon",
-				              title:"If checked, other users can find this program"
-				             },
-					     checkbox("public",
-						      { checked: public
-						      })),
-				   community_examples ?
-				   $.el.span({class:"input-group-addon",
-				              title:"If checked, add to examples menu"
-				             },
-					     checkbox("example",
-						      { checked: example
-						      })) : undefined,
-			   input = textInput("name",
-					     {placeholder:"Name " + empty,
-					      title:"Public name of your program",
-					      value:name,
-					      disabled:disabled}),
-			   name ?
-			     fork = $.el.span({class:"input-group-btn"
-					      },
-					      $.el.button({ class: "btn btn-success",
-							    type: "button"
-							  }, "Fork")) : undefined
-				  )));
-
-	if ( fork ) {
-	  $(fork).on("click", function() {
-	    var btn = $(input).closest("form").find(".btn.btn-primary");
-	    $(input).attr("placeholder", "Fork as " + empty);
-	    $(input).val("");
-	    btn.text(btn.text().replace("Update", "Fork"));
-	  });
-	}
-
-	return elem;
-      },
-
-      title: function(title) {
-	var elem =
-	$.el.div({class:"form-group"},
-		 label("title", "Title"),
-		 $.el.div({class:valgridw()},
-			  textInput("title",
-				    {placeholder:"Descriptive title",
-				     value:title})));
-	return elem;
-      },
-
-      /**
-       * @param {String} [identity] if provided, this indicates that the
-       * author cannot be changed.
-       */
-      author: function(author, identity) {
-	var options = { placeholder:"Your name", value:author };
-
-	if ( author && identity ) {
-	  options.readonly = true;
-	  options.title    = "Verified author name";
-	}
-
-	var elem =
-	$.el.div({class:"form-group"},
-		 label("author", "Author"),
-		 $.el.div({class:valgridw()},
-			  textInput("author", options)));
-	return elem;
-      },
-
-      link: function(link) {
-	var options = {
-	  readonly: true,
-	  title: "Permalink",
-	  value: link
-	};
-	var elem =
-	$.el.div({class:"form-group"},
-		 label("link", "Link"),
-		 $.el.div({class:valgridw()},
-			  textInput("link", options)));
-	return elem;
-      },
-
-      date: function(stamp, labels, name) {
-	name = name||label;
-	var elem =
-	$.el.div({class:"form-group"},
-		 label(name, labels),
-		 $.el.div({class:valgridw()},
-			  textInput(name,
-				    {disabled: true,
-				     value:new Date(stamp*1000).toLocaleString()
-				    })));
-	return elem;
-      },
-
-      description: function(description) {
-	var elem =
-	$.el.div({class:"form-group"},
-		 label("description", "Description"),
-		 $.el.div({class:valgridw()},
-			  textarea("description", {value:description})));
-	return elem;
-      },
-
-      commit_message: function(msg) {
-	var elem =
-	$.el.div({class:"form-group"},
-		 label("commit_message", "Changes"),
-		 $.el.div({class:valgridw()},
-			  textarea("commit_message",
-				   { value:msg,
-				     placeholder:"Describe your changes here"
-				   })));
-	return elem;
-      },
-
-      description: function(msg) {
-	var elem =
-	$.el.div({class:"form-group"},
-		 label("description", "Description"),
-		 $.el.div({class:valgridw()},
-			  textarea("description",
-				   { value:msg,
-				     placeholder:"Description"
-				   })));
-	return elem;
-      },
-
-      tags: function(tags) {
-	var elem =
-	$.el.div({class:"form-group"},
-		 label("tags", "Tags"),
-		 $.el.div({class:valgridw()},
-			  tagInput("tags", "Tags help finding this code", tags)));
-	return elem;
-      },
-
-      /**
-       * Provide checkboxes for determining who may save a new version
-       * of this file
-       */
-      modify: function(who, canmodify) {
-	var fields = [];
-	var opts = { name:"modify", label:"Can save new version",
-		     type:"array"
-		   };
-
-	function add(key, label) {
-	  fields.push({ name:key,
-			label:label,
-			value:who.indexOf(key) != -1,
-			readonly: !canmodify
-		      });
-	}
-
-	add("any",   "Anyone");
-	add("login", "Logged in users");
-	add("owner", "Only me");
-
-	if ( !canmodify )
-	  opts.title = "Only logged in users and owners can set permissions";
-	else
-	  opts.title = "Specify who can save an updated version of this file";
-
-	return form.fields.checkboxes(fields, opts);
-      },
-
-      follow: function(email) {
-	return form.fields.checkboxes(
-		 [ { name: "follow", label: "Follow this document",
-		     value:!!email, readonly:!email
-		   }
-		 ],
-		 { name:"options", label:"",
-		   title: "Notify about activity (updates, chat)\n"+
-			  "Requires being logged in with valid email"
-		 });
-      },
-
-      projection: function(projection) {
-	var elem =
-	$.el.div({class:"form-group"},
-		 label("projection", "Projection"),
-		 $.el.div({class:valgridw()},
-			  textInput("projection",
-				    {placeholder:"Columns", value:projection})));
-	return elem;
-      },
-
-      csvFormat: function(list, format) {
-	var elem;
-
-	list = list||["prolog"];
-	format = format||list[0];
-
-	if ( list.length == 1 ) {
-	  elem = $.el.input({type:"hidden", name:"format", value:list[0]});
-	} else {
-	  elem = $.el.div({class:"form-group"},
-			  label("format", "Format"),
-			  $.el.div({class:valgridw()},
-				   select("format",
-					  list,
-					  {value:format})));
-	}
-
-	return elem;
-      },
-
-      /**
-       * Ask for limit and distinct to modify the solution set.
-       * @param {Number} [limit] is the max number of solutions to
-       * return
-       * @param {Boolean} [distinct] requests only to return distinct
-       * solutions.
-       */
-      limit: function(limit, distinct) {
-	var elem =
-	$.el.div({class:"form-group"},
-		 label("name", "Distinct | limit"),
-		 $.el.div({class:valgridw()},
-			  $.el.div({class:"input-group"},
-				   $.el.span({class:"input-group-addon",
-				              title:"If checked only return distinct results"
-				             },
-					     checkbox("distinct",
-						      { checked: distinct
-						      })),
-				   textInput("limit",
-					     {placeholder:"Maximum result count (blank for unlimited)",
-					      title:"Limit results",
-					      value:limit}))));
-	return elem;
-      },
-
-      /**
-       * @param {Array} boxes is a list of checkbox specifications.
-       * Uses .name, .label, .value (Boolean) and .readonly
-       */
-      checkboxes: function(boxes, options) {
-	var boxel;
-
-	options = $.extend({name:"options", label:"Options", col:LABELWIDTH},
-			   options||{});
-
-	var dopts = { class: "checkboxes col-xs-"+(12-options.col),
-	              name:  options.name
-		    };
-	if ( options.title ) dopts.title = options.title;
-	if ( options.type  ) dopts.class += " "+options.type;
-	var elem =
-	$.el.div({class:"form-group"},
-		 label(options.name, options.label, options.col),
-		 boxel = $.el.div(dopts));
-
-	for(var k=0; k<boxes.length; k++) {
-	  var box = boxes[k];
-	  var opts = {type: "checkbox", name:box.name, autocomplete:"false"};
-	  if ( box.value )
-	    opts.checked = "checked";
-	  if ( box.readonly )
-	    opts.disabled = "disabled";
-	  $(boxel).append($.el.label({class:"checkbox-inline"},
-				     $.el.input(opts), box.label));
-	}
-
-	return elem;
-      },
-
-      chunk: function(value) {
-	var elem =
-	$.el.div({class:"form-group"},
-		 label("count", "Initial solutions", 3),
-		 $.el.div({class:"col-xs-9"},
-			  $.el.div({class:"input-group"},
-				   textInput("chunk",
-					     { title:"Initial number of solutions",
-					       type:"number",
-					       value:value}))));
-	return elem;
-      },
-
-      name: function(name, col) {
-	col = col||3;
-	var elem =
-	$.el.div({class:"form-group"},
-		 label("name", "Name", col),
-		 $.el.div({class:"col-xs-"+(12-col)},
-			  textInput("name",
-				    {placeholder:"Name",
-				     value:name})));
-	return elem;
-      },
-
-      filename: function(name, col) {
-	col = col||3;
-	var elem =
-	$.el.div({class:"form-group"},
-		 label("filename", "File name", col),
-		 $.el.div({class:"col-xs-"+(12-col)},
-			  textInput("filename",
-				    {placeholder:"File name",
-				     value:name})));
-	return elem;
-      },
-
-      hidden: function(name, value) {
-	if ( value !== undefined )
-	  return $.el.input({type:"hidden", name:name, value:value});
-      },
-
-      /**
-       * @param {Object} options
-       * @param {String} options.label is the label used for the
-       * primary button.
-       * @param {Function} options.action is called with two arguments,
-       * the _event_ and the serialized data from the embedded form
-       * @param {Number} options.offset determines the begin column in
-       * the grid (default 2)
-       */
-      buttons: function(options) {
-	options    = options||{};
-	var label  = options.label||"Save program";
-	var offset = options.offset||LABELWIDTH;
-	var button = $.el.button({ name:"save",
-				   class:"btn btn-primary"
-				 },
-				 label);
-
-	$(button).on("click", function(ev) {
-	  var elem = $(ev.target).parents("form")[0];
-	  var data = form.serializeAsObject($(elem));
-
-	  options.action(ev, data);
-	  $(ev.target).parents(".modal").modal('hide');
-	  ev.preventDefault();
-	  return false;
-	});
-
-	var elem =
-	$.el.div({class:"form-group"},
-		 $.el.div({class:"col-xs-offset-"+offset+" col-xs-"+(12-offset)},
-			  button,
-			  $.el.button({name:"cancel",
-				       class:"btn btn-danger",
-				       'data-dismiss':"modal"},
-				      "Cancel")));
-	return elem;
-      },
-
-      /**
-       * Bootstrap radio button.  To get the value, use
-       * `$("label.active > input[name=Name]").val();
-       * @param {String} name is the name of the radio button
-       * @param {Array(Object)} buttons is an array of objects with
-       * .active, .label and .value
-       */
-      radio: function(name, buttons, type) {
-	var elem = $.el.div({class:"btn-group", "data-toggle":"buttons"});
-	type = type||"radio"
-
-	for(var i=0; i<buttons.length; i++) {
-	  var cls = "btn btn-default btn-xs";
-	  if ( buttons[i].active )
-	    cls += " active";
-
-	  var opts = { type:type, name:name,
-	               autocomplete:"off",
-		       value:buttons[i].value
-		     };
-	  var lblopts = {class:cls};
-	  if ( buttons[i].title )
-	    lblopts.title = buttons[i].title;
-	  $(elem).append($.el.label(lblopts,
-				    $.el.input(opts),
-				    buttons[i].label));
-	}
-
-        return elem;
-      }
-    },
-
-    widgets: {
-      glyphIcon: function(glyph) {
-	return $.el.span({class:"glyphicon glyphicon-"+glyph});
-      },
-
-      typeIcon: function(type) {
-	return $.el.span({class:"dropdown-icon type-icon "+type});
-      },
-
-      glyphIconButton: function(glyph, options) {
-	var attrs = {class:"btn", type:"button"};
-
-	if ( options.action ) attrs['data-action'] = options.action;
-	if ( options.title )  attrs.title          = options.title;
-	if ( options.class )  attrs.class	  += " "+options.class;
-
-	return $.el.button(attrs, form.widgets.glyphIcon(glyph));
-      },
-
-      /**
-       * Turn an icon into a dropdown button.
-       * @param {Object} options
-       * @param {Any}	 options.client is the `this` for the menu
-       *		 functions.
-       * @param {String} [options.divClass] additional class for the
-       * returned `div` element
-       * @param {String} [options.ulClass] additional class for the
-       * `ul` element that defines the menu.
-       * @param {Object} [options.actions] defines the menu items.
-       * this is passed to populateMenu()
-       * @returns {DIV} the downdown button
-       */
-      dropdownButton: function(icon, options) {
-	if ( !options ) options = {};
-	var cls     = options.divClass;
-	var ulClass = options.ulClass;
-
-	var dropdown = $.el.div(
-	  {class: "btn-group dropdown"+(cls?" "+cls:"")},
-	  $.el.button(
-	    {class:"dropdown-toggle",
-	     "data-toggle":"dropdown"},
-	    icon),
-	  $.el.ul({class:"dropdown-menu"+(ulClass?" "+ulClass:"")}));
-
-	if ( options.actions )
-	  form.widgets.populateMenu($(dropdown), options.client, options.actions);
-
-	return dropdown;
-      },
-
-      populateMenu: function(menu, client, actions) {
-	var ul = menu.find(".dropdown-menu");
-	var data = ul.data("menu")||{};
-
-	function runMenu(ev, a) {
-	  var action = $(a).data('action');
-
-	  if ( action )
-	    action.call(client, a);
-	}
-
-	function addMenuItem(label, onclick) {
-	  if ( onclick !== undefined ) {
-	    if ( label.indexOf("--") == 0 ) {
-	      ul.append($.el.li({class:"divider"}));
-	    } else {
-	      var a = $.el.a(label);
-
-	      $(a).data('action', onclick);
-	      ul.append($.el.li(a));
-	    }
-	  }
-	}
-
-	for(var a in actions) {
-	  if ( actions.hasOwnProperty(a) ) {
-	    addMenuItem(a, actions[a]);
-	  }
-	}
-
-	if ( !data.bound ) {
-	  data.bound = true;
-	  ul.on("click", "a", function(ev) { runMenu(ev, this); } );
-	}
-
-	ul.data("menu", data);
-
-	return menu;
-      }
-    }
-  };
-
-		 /*******************************
-		 *	     FUNCTIONS		*
-		 *******************************/
-
-  function valgridw(n) {
-    if ( n === undefined ) n = LABELWIDTH;
-    return "col-xs-"+(12-n);
-  }
-  function colgridw(n) {
-    if ( n === undefined ) n = LABELWIDTH;
-    return "col-xs-"+n;
-  }
-
-  function label(elemName, text, width) {
-    width = width || LABELWIDTH;
-    return $.el.label({class:"control-label col-xs-"+width+"", for:elemName}, text);
-  }
-
-  function checkbox(name, options) {
-    var attrs = {name:name, type:"checkbox"};
-    options = options||{};
-    if ( options.checked ) attrs.checked = "checked";
-    if ( options.title   ) attrs.title	 = options.title;
-    return $.el.input(attrs);
-  }
-
-  function textInput(name, options) {
-    var attrs = {name:name, type:"text", class:"form-control"};
-    options = options||{};
-    if ( options.placeholder ) attrs.placeholder = options.placeholder;
-    if ( options.title )       attrs.title       = options.title;
-    if ( options.value )       attrs.value       = options.value;
-    if ( options.disabled )    attrs.disabled    = options.disabled;
-    if ( options.readonly )    attrs.readonly    = options.readonly;
-    if ( options.type )        attrs.type        = options.type;
-    return $.el.input(attrs);
-  }
-
-  function tagInput(name, placeholder, tags) {
-    var attrs = { name:name, type:"text",
-                  class:"tm-input tag-list"
-                };
-    if ( placeholder ) attrs.placeholder = placeholder;
-    var elem = $.el.input(attrs);
-    if ( tags )
-      $(elem).data("prefilled", tags);
-    return elem;
-  }
-
-  function helpBlock(help) {
-    return $.el.p({class:"help-block"},
-		  "Make saved file public and give it a meaningful name");
-  }
-
-  function textarea(name, options) {
-    var attrs = {name:name, class:"form-control"};
-    options = options||{};
-
-    if ( options.placeholder ) attrs.placeholder = options.placeholder;
-
-    return $.el.textarea(attrs, options.value||"");
-  }
-
-  /**
-   * Create a bootstrap <select> element from a list of options
-   * @param {String} name is the name of the select element
-   * @param {Array} from is an array of options. Each options is a
-   * string or an object with keys `value` and `label`.
-   * @param {Object} [options]
-   * @param {Object} [options.value] If provided, the corresponding
-   * option is selected
-   */
-
-  function select(name, from, options) {
-    var select = $($.el.select({class:"form-control", name:name}));
-
-    options=options||{};
-
-    function addSelect(e) {
-      if ( typeof(e) == "string" ) {
-	if ( e == options.value ) {
-	  select.append($.el.option({selected:"selected"}, e));
-	} else {
-	  select.append($.el.option(e));
-	}
-      } else {
-	var opts = {value:e.value};
-	if ( e.value == options.value )
-	  opts.selected = "selected";
-
-	select.append($.el.option(opts, e.label));
-      }
-    }
-
-    for(var i=0; i<from.length; i++)
-      addSelect(from[i]);
-
-    return select[0];
-  }
-
-  return form;
-});
-
-/*  Part of SWISH
-
-    Author:        Jan Wielemaker
-    E-mail:        J.Wielemaker@cs.vu.nl
-    WWW:           http://www.swi-prolog.org
-    Copyright (C): 2015-2016, VU University Amsterdam
-			      CWI Amsterdam
-    All rights reserved.
-
-    Redistribution and use in source and binary forms, with or without
-    modification, are permitted provided that the following conditions
-    are met:
-
-    1. Redistributions of source code must retain the above copyright
-       notice, this list of conditions and the following disclaimer.
-
-    2. Redistributions in binary form must reproduce the above copyright
-       notice, this list of conditions and the following disclaimer in
-       the documentation and/or other materials provided with the
-       distribution.
-
-    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-    "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-    LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
-    FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
-    COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
-    INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
-    BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
-    LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
-    CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-    LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
-    ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
-    POSSIBILITY OF SUCH DAMAGE.
-*/
-
-/**
- * @fileOverview
- *
- * Manage application history. This file supports  two types of history:
- * plugin for the browser history  and  keep   track  of  issues such as
- * recently used files.
- *
- * @version 0.2.0
- * @author Jan Wielemaker, J.Wielemaker@vu.nl
- */
-
-define('history',["jquery", "preferences", "form", "utils"],
-       function($, preferences, form, utils) {
-  var history = {
-
-		 /*******************************
-		 *	 BROWSER HISTORY	*
-		 *******************************/
-
-    /**
-     * Push a new entry to the browser history.  Since we have tabs,
-     * there isn't much reason for a back button.  We merely use the
-     * history to switch the location bar to the current document.
-     */
-    push: function(options) {
-      var cpath = window.location.pathname;
-
-      if ( cpath != options.url ) {
-	var state = {location: options.url, reason: options.reason};
-
-	window.history.pushState(state, "", options.url);
-	document.title = "SWISH -- "
-                       + (options.url ? utils.basename(options.url)
-			              : "SWI-Prolog for SHaring");
-      }
-    },
-
-    /**
-     * Restore a previous browser history state.  simply ignores.
-     * See push() for details.
-     */
-    pop: function(e) {
-    },
-
-		 /*******************************
-		 *	  RECENT DOCUMENTS	*
-		 *******************************/
-
-    recentMaxLength: 10,
-
-    /**
-     * Add/refresh document to list of recent documents.
-     * @param {Object} doc
-     * @param {String} doc.id is the document _identifier_
-     * @param {String} [doc.label] is the document label for
-     * the _Open recent_ menu.  Default is the `id`.
-     * @param {String} doc.type is the type of document.
-     * A document of a specific type is opened by calling
-     * `history.openRecent.type.call(event, doc)`
-     */
-
-    addRecent: function(doc) {
-      var recent = preferences.getVal("recentDocuments")||[];
-
-      function equalDocument(d1, d2) {
-	return d1.type == d2.type && d1.id == d2.id;
-      }
-
-      for(var i=0; i<recent.length; i++) {
-	if ( equalDocument(doc, recent[i]) ) {
-	  recent.splice(i,1);
-	  break;
-	}
-      }
-      while ( recent.length+1 > history.recentMaxLength )
-	recent.pop();
-      recent.splice(0,0,doc);
-
-      preferences.setVal("recentDocuments", recent);
-    },
-
-    openRecent: function(ev, doc) {
-      return history.openRecent[doc.st_type](ev, doc);
-    },
-
-    /**
-     * Fill a (navbar) <ul> with <li><a> elements, where
-     * each <a> carries the related entry as `data('document')`
-     */
-    updateRecentUL: function() {
-      var ul = $(this);
-      var recent = preferences.getVal("recentDocuments")||[];
-
-      ul.html("");
-      for(var i=0; i<recent.length; i++) {
-	var e = recent[i];
-
-	if ( e.id ) {
-	  var a = $.el.a(form.widgets.typeIcon(e.id.split(".").pop()),
-			 e.label||e.id);
-
-	  $(a).data('document', e);
-	  ul.append($.el.li(a));
-	}
-      }
-    }
-  };
-
-  /**
-   * Open recent "gitty" document
-   */
-  history.openRecent.gitty = function(ev, doc) {
-    $(ev.target).parents(".swish").swish('playFile', doc.id);
-  };
-
-  window.onpopstate = history.pop;
-
-  return history;
-});
-
-/*  Part of SWISH
-
-    Author:        Anne Ogborn
-    E-mail:        annie66us@yahoo.com
-    WWW:           http://www.swi-prolog.org
-    Copyright (C): 2018, Anne Ogborn
-    All rights reserved.
-
-    Redistribution and use in source and binary forms, with or without
-    modification, are permitted provided that the following conditions
-    are met:
-
-    1. Redistributions of source code must retain the above copyright
-       notice, this list of conditions and the following disclaimer.
-
-    2. Redistributions in binary form must reproduce the above copyright
-       notice, this list of conditions and the following disclaimer in
-       the documentation and/or other materials provided with the
-       distribution.
-
-    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-    "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-    LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
-    FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
-    COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
-    INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
-    BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
-    LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
-    CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-    LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
-    ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
-    POSSIBILITY OF SUCH DAMAGE.
-*/
-/**
- * @fileOverview
- * This file creates avatars from the SVG file icons/avatar.svg by
- * changing visibility and fill colors.  This is used in `chat.js`.
- *
- * @version 0.2.0
- * @author Anne Ogborn, annie66us@yahoo.com
- * @requires jquery
- */
-define('svgavatar',["jquery", "laconic"],
-    function() {
-
-        (function($) {
-            var pluginName = 'svgavatar';
-
-            /** @lends $.fn.svgavatar */
-            var methods = {
-                _init: function(options) {
-                    return this.each(function() {
-                        var elem = $(this);
-                        var data = {}; /* private data */
-
-
-                        elem.data(pluginName, data); /* store with element */
-                    });
-                },
-
-                /**
-                 * @param {int} an integer from a range at least 0-2^20
-                 */
-                setAVappearanceByUserID: function(ID) {
-		  return $(this).each(function() {
-		    var _this = $(this);
-
-		    var h = ID & 0x1FFFFF;
-		    _this.svgavatar('selectAppearance', 'hair', h & 0x07);
-		    _this.svgavatar('setFill', 'hair',
-				    ['#000000', '#CC4400', '#FFFF22', '#9f220B'][(h >> 3) & 0x03]);
-		    _this.svgavatar('selectAppearance', 'body', (h >> 5) & 0x03);
-		    _this.svgavatar('setFill', 'body',
-				    ['#95D155', '#19A6BA', '#F03C9B', '#0B061F'][(h >> 7) & 0x03]);
-		    _this.svgavatar('selectAppearance', 'eyes', (h >> 9) & 0x07);
-		    _this.svgavatar('selectAppearance', 'nose', (h >> 11) & 0x03);
-		    _this.svgavatar('selectAppearance', 'mouth', (h >> 13) & 0x07);
-		  });
-                },
-
-                selectAppearance: function(section, index) {
-		  $(this).find('#' + section + ' g').css('display', 'none');
-		  $(this).find('#' + section + ' g:nth-child(' + index + ')').css('display', 'inherit');
-                },
-
-                setFill: function(section, color) {
-		  return $(this).each(function() {
-		    $(this).find('#' + section + ' [fill]').attr('fill', color);
-		  });
-                }
-            }; // methods
-
-                /**
-                 * <Class description>
-                 *
-                 * @class svgavatar
-                 * @tutorial jquery-doc
-                 * @memberOf $.fn
-                 * @param {String|Object} [method] Either a method name or the jQuery
-                 * plugin initialization object.
-                 * @param [...] Zero or more arguments passed to the jQuery `method`
-                 */
-
-                $.fn.svgavatar = function(method) {
-                    if (methods[method]) {
-                        return methods[method]
-                            .apply(this, Array.prototype.slice.call(arguments, 1));
-                    } else if (typeof method === 'object' || !method) {
-                        return methods._init.apply(this, arguments);
-                    } else {
-                        $.error('Method ' + method + ' does not exist on jQuery.' + pluginName);
-                    }
-                };
-        }(jQuery));
-    });
-
-/*  Part of SWISH
-
-    Author:        Jan Wielemaker
-    E-mail:        J.Wielemaker@cs.vu.nl
-    WWW:           http://www.swi-prolog.org
-    Copyright (C): 2016-2018, VU University Amsterdam
-			      CWI Amsterdam
-    All rights reserved.
-
-    Redistribution and use in source and binary forms, with or without
-    modification, are permitted provided that the following conditions
-    are met:
-
-    1. Redistributions of source code must retain the above copyright
-       notice, this list of conditions and the following disclaimer.
-
-    2. Redistributions in binary form must reproduce the above copyright
-       notice, this list of conditions and the following disclaimer in
-       the documentation and/or other materials provided with the
-       distribution.
-
-    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-    "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-    LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
-    FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
-    COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
-    INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
-    BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
-    LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
-    CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-    LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
-    ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
-    POSSIBILITY OF SUCH DAMAGE.
-*/
-
-/**
- * @fileOverview
- * Deal with cooperation
- *
- * @version 0.2.0
- * @author Jan Wielemaker, J.Wielemaker@vu.nl
- * @requires jquery
- */
-
-define('chat',[ "jquery", "config", "preferences", "form", "modal", "utils",
-	 "svgavatar"
-       ],
-       function($, config, preferences, form, modal, utils) {
-
-var MIN_RECONNECT_DELAY =  10000;
-var MAX_RECONNECT_DELAY = 300000;
-
-(function($) {
-  var pluginName = 'chat';
-  var reconnect_delay = MIN_RECONNECT_DELAY;
-  var last_open = null;
-
-  /** @lends $.fn.chat */
-  var methods = {
-    _init: function(options) {
-      return this.each(function() {
-	var elem = $(this);
-	var data = {};			/* private data */
-
-	elem.data(pluginName, data);	/* store with element */
-
-	/* add event handling */
-	elem.on("click", function(ev) {
-	  var li = $(ev.target).closest("li.user");
-
-	  if ( li.length == 1 )
-	    elem.chat('unnotify', li.attr("id"));
-	});
-	elem.on("send", function(ev, msg) {
-	  elem.chat('send', msg);
-	});
-	$(window).bind("beforeunload", function() {
-	  elem.chat('disconnect');
-	});
-
-	/* setup websocket */
-	if ( config.swish.chat ) {
-	  elem.chat('connect');
-	}
-      });
-    },
-
-		 /*******************************
-		 *	      WEBSOCKET		*
-		 *******************************/
-
-    /**
-     * Create a websocket connection to /chat on the SWISH server.
-     */
-    connect: function() {
-      var elem = this;
-      var data = this.data(pluginName);
-      var url  = window.location.host + config.http.locations.swish_chat;
-      var lead = "?";
-      var ws = window.location.protocol.replace("http", "ws");
-
-      if ( data.connection && data.connection.readyState != 3 )
-	return this;			/* already connecting, open or closing */
-
-      function add_pref_param(name, pname) {
-	var value = preferences.getVal(pname);
-
-	if ( value ) {
-	  if ( pname == "anon-avatar" ) {
-	    /* hack to deal with possibly rebased server */
-	    if ( value.indexOf("#") == -1 ) {
-	      value = config.http.locations.avatar+value.split("/").pop();
-	    } else {
-	      value = config.http.locations.swish+"icons/"+value.split("/").pop();
-	    }
-	  }
-
-	  url += lead + name + "=" + encodeURIComponent(value);
-	  lead = "&";
-	}
-      }
-
-      add_pref_param("avatar",   "anon-avatar");
-      add_pref_param("nickname", "nick-name");
-
-      if ( data.reconnect ) {			/* reconnecting */
-	url += lead + "reconnect" + "=" + encodeURIComponent(data.reconnect);
-	lead = "&";
-      }
-
-      try {
-	data.connection = new WebSocket(ws + "//" + url,
-					['v1.chat.swish.swi-prolog.org']);
-      } catch(err) {
-	elem.chat('userCount', undefined);
-	return;
-      }
-
-      data.connection.onerror = function(error) {
-	elem.chat('userCount', undefined);
-      };
-      data.connection.onclose = function(ev) {
-	if ( last_open == null ) {
-	  reconnect_delay *= 2;
-	  if ( reconnect_delay > MAX_RECONNECT_DELAY )
-	    reconnect_delay = MAX_RECONNECT_DELAY;
-	} else {
-	  if ( getTime() - last_open > 300000 )
-	  { reconnect_delay = MIN_RECONNECT_DELAY;
-	  } else
-	  { reconnect_delay *= 2;
-	    if ( reconnect_delay > MAX_RECONNECT_DELAY )
-	      reconnect_delay = MAX_RECONNECT_DELAY;
-	  }
-	}
-	setTimeout(function() {
-	  elem.chat('connect');
-	}, reconnect_delay);
-      };
-      data.connection.onmessage = function(e) {
-	var msg = JSON.parse(e.data);
-	msg.origin = e.origin;
-	if ( msg.type )
-	  elem.chat(msg.type, msg);
-	else
-	  console.log(e);
-      };
-      data.connection.onopen = function() {
-      };
-    },
-
-    empty_queue: function() {
-      var data = this.data(pluginName);
-
-      while( data.queue &&
-	     data.queue.length > 0
-	     && data.connection.readyState == 1 ) {
-	var str = data.queue.shift();
-	data.connection.send(str);
-      }
-    },
-
-    disconnect: function() {
-      var data = this.data(pluginName);
-
-      if ( data.connection ) {
-	this.chat('send', {type: "unload"});
-	data.connection.onclose = function(){};
-	data.connection.close();
-	data.connection = undefined;
-      }
-
-      return this;
-    },
-
-
-		 /*******************************
-		 *	   BASIC MESSAGES	*
-		 *******************************/
-
-    /**
-     * @param {Object} msg is the JSON object to broadcast
-     */
-    send: function(msg) {
-      var data = this.data(pluginName);
-
-      if ( data && data.connection ) {
-	var str = JSON.stringify(msg);
-
-	if ( data.connection.readyState != 1 ) {
-	  if ( !data.queue )
-	    data.queue = [str];
-	  else
-	    data.queue.push(str);
-	  this.chat('connect');
-	} else {
-	  data.connection.send(str);
-	}
-      }
-
-      return this;
-    },
-
-    subscribe: function(channel, sub_channel) {
-      var msg = { type: "subscribe", channel: channel };
-
-      if ( sub_channel )
-	msg.sub_channel = sub_channel;
-
-      this.chat('send', msg);
-    },
-
-    unsubscribe: function(channel, subchannel) {
-      var msg = { type: "unsubscribe", channel: channel };
-
-      if ( sub_channel )
-	msg.sub_channel = sub_channel;
-
-      this.chat('send', msg);
-    },
-
-		 /*******************************
-		 *	      ACTIONS		*
-		 *******************************/
-
-    /**
-     * The welcome message is sent by SWISH immediately after opening
-     * the websocket connection.  It provides the session UID for this
-     * user
-     */
-    welcome: function(e) {
-      var data = this.data(pluginName);
-
-      if ( data.wsid && data.wsid != e.wsid ) {
-	this.html("");				/* server restart? */
-      }
-
-      data.wsid = e.wsid;
-      data.reconnect = e.reconnect;		/* reconnection token */
-      if ( e.avatar && e.avatar_source == 'generated' )
-	preferences.setVal("anon-avatar", e.avatar);
-      e.role = "self";
-
-      var li = this.chat('addUser', e);
-      $(li).addClass("myself");
-      this.chat('userCount', e.visitors);
-      last_open = getTime();
-
-      if ( e.check_login )
-	$("#login").login('update', "check");
-      else
-	$(".sourcelist").trigger("login");
-      $(".storage").storage('chat_status');
-      this.chat('empty_queue');
-    },
-
-    userCount: function(cnt) {
-      var elem = $("#user-count");
-
-      if ( cnt == undefined ) {
-	elem.parent().hide();
-      } else {
-	elem.parent().show();
-	elem.text(cnt);
-      }
-    },
-
-    /**
-     * Replied when opening SWISH on a file to inform
-     * the new user about existing visitors to same
-     * files as are open in the current SWISH.  See
-     * inform_newby_about_existing_gazers/2.
-     */
-    gazers: function(e) {
-      if ( e.gazers ) {
-	for(var i=0; i<e.gazers.length; i++) {
-	  var gazer = e.gazers[i];
-	  this.chat('addUser', gazer);
-	  if ( gazer.file )
-	    this.chat('addUserFile', gazer.wsid, gazer.file);
-	}
-      }
-    },
-
-    /**
-     * Replied if the profile associated with a visitor changes.  A
-     * key `reason` carries the reason for the change.
-     */
-
-    profile: function(e) {
-      var data = this.data(pluginName);
-      var li = $("#"+e.wsid);
-
-      li.children("a").html("").append(avatar(e));
-      if ( e.avatar ) {
-	$("*[data-userid="+e.wsid+"] img.avatar").attr("src", e.avatar);
-	if ( e.avatar_source == 'generated' )
-	  preferences.setVal("anon-avatar", e.avatar);
-      }
-
-      if ( e.name ) {
-	li.prop('title', e.name);
-	if ( e.reason == 'set-nick-name' ) {
-	  e.html = "Named <i>"+utils.htmlEncode(e.name)+"</i>";
-	  this.chat('notifyUser', e);
-	}
-      }
-
-      if ( data.wsid == e.wsid ) {	/* current user profile changed */
-	$(".sourcelist").trigger("login");
-      }
-    },
-
-    /**
-     * A user has rejoined. This is the case if we lost the
-     * connection and the connection was re-established.
-     */
-    rejoined: function(e) {
-      var avatars = $("#"+e.wsid);
-
-      this.chat('lost', avatars, false);
-      if ( e.visitors )
-	this.chat('userCount', e.visitors);
-    },
-
-    /**
-     * A new user has joined.
-     */
-    joined: function(e) {
-      if ( e.visitors )
-	this.chat('userCount', e.visitors);
-    },
-
-    session_closed: function() {
-      $("#login").login('update', "session-closed");
-    },
-
-    /**
-     * Display a notification by some user.
-     */
-    notify: function(e) {
-      this.chat('notifyUser', e);
-    },
-
-    /**
-     * Add incomming chat messages to the chatroom.  If there is no
-     * chatroom we should warn/open it
-     */
-    'chat-message': function(e) {
-      var rooms = $("div.chatroom").chatroom('rooms', e.docid);
-
-      $(".storage").storage('chat_message', e);
-
-      if ( e.docid == "gitty:"+config.swish.hangout ) {
-	$("#broadcast-bell").chatbell('chat-message', e);
-      }
-
-      if ( rooms.length > 0 ) {
-	rooms.chatroom('add', e);
-	e.displayed = true;
-      } else {
-	if ( $("#"+e.user.id).length > 0 ) {
-	  msg = $.extend({}, e);
-	  msg.wsid = e.user.id;
-	  msg.html = "Wants to chat";
-	  this.chat('notifyUser', msg);
-	}
-      }
-    },
-
-    /**
-     * Some action was forbidden
-     */
-
-     forbidden: function(e) {
-       modal.alert(e.message||"Action is forbidden");
-     },
-
-    /**
-     * Indicate we have read all messages upto a certain time stamp.
-     * @param {String} docid is the document id for which we should
-     * update the counter.
-     * @param {Number} time is the time of the last message read
-     * (seconds after 1/1/1970)
-     */
-    read_until: function(docid, time) {
-      preferences.setDocVal(docid, 'chatBar', time);
-    },
-
-
-		 /*******************************
-		 *	        UI		*
-		 *******************************/
-
-    /**
-     * Get the broadcast room
-     */
-     broadcast_room: function() {
-      return this.closest(".swish")
-                 .find(".storage")
-                 .storage('match', {file:config.swish.hangout});
-    },
-
-    /**
-     * Present a notification associated with a user. We do not
-     * add a user icon for open and close on the broadcast room if
-     * we do not have this open when the message arrives.
-     */
-    notifyUser: function(options) {
-      var elem = this;
-
-      function isBroadcast(options) {
-	return ( ( options.event == 'opened' ||
-		   options.event == 'closed' ) &&
-		 options.event_argv &&
-		 options.event_argv[0] == config.swish.hangout
-	       );
-      }
-
-      if ( isBroadcast(options) && !this.chat('broadcast_room') )
-	options.create_user = false;
-
-      var user_li = this.chat('addUser', options);
-
-      if ( user_li && user_li.length > 0 ) {
-	options.onremove = function() {
-	  elem.chat('unnotify', options.wsid);
-	};
-	modal.notify(user_li, options);
-
-	this.chat('updateFiles', options);
-      }
-    },
-
-    unnotify: function(wsid) {
-      if ( $("#"+wsid).hasClass("removed") )
-	this.chat('removeUser', wsid);
-
-      return this;
-    },
-
-    updateFiles: function(options) {
-      var data = $(this).data(pluginName);
-
-      function file() {
-	return options.event_argv[0];
-      }
-
-      if ( options.event == "opened" ) {
-	this.chat('addUserFile', options.wsid, file());
-      } else if ( options.event == "closed" ) {
-	var wsid = options.wsid == data.wsid ? undefined : options.wsid;
-	this.chat('removeUserFile', wsid, file(), true);
-      }
-    },
-
-    /**
-     * Return or add a user to the notification area.
-     * @param {Object} options
-     * @param {String} options.wsid Identifier for the user (a UUID)
-     * @param {String} [options.name] is the name of the user
-     * @returns {jQuery} the `li` element representing the user
-     */
-    addUser: function(options) {
-      var li = $("#"+options.wsid);
-
-      if ( li.length == 0 )
-      { if ( options.create_user != false ) {
-	  li = $(li_user(options.wsid, options));
-	  this.prepend(li);
-        } else {
-	  return null;
-	}
-      } else {
-	this.chat('lost', li, false);
-      }
-
-      return li;
-    },
-
-    /**
-     * Remove a user avatar.  If a notification is pending we delay
-     * removal until the notification times out
-     */
-    removeUser: function(wsid) {
-      if ( typeof wsid == "string" ) {
-	wsid = {wsid:wsid};
-      }
-
-      if ( wsid.visitors !== undefined )
-	this.chat('userCount', wsid.visitors);
-      var li = $("#"+wsid.wsid);
-      if ( li.length == 0 )
-	return this;
-
-      if ( wsid.reason != "close" ) {
-	if ( $("#ntf-"+wsid.wsid).length > 0 )	/* notification pending */
-	  li.addClass("removed");
-	else
-	  li.hide(400, function() {this.remove();});
-      } else {					/* connection was lost */
-	this.chat('lost', li, true);
-      }
-
-      return this;
-    },
-
-    /**
-     * Set/clear lost-connection state of users.
-     * @param {jQuery} li set of items to set/clear
-     * @param {Boolean} lost is `true` if we lost the connection
-     */
-    lost: function(li, lost) {
-      if ( lost ) {
-	li.addClass("lost");
-      } else {
-	li.removeClass("lost");
-      }
-
-      li.each(function() {
-	var elem = $(this);
-	if ( lost ) {
-	  elem.data('lost-timer',
-		    setTimeout(function() {
-		      if ( li.hasClass("lost") )
-			li.remove();
-		    }, 60000));
-	} else {
-	  var tmo = elem.data('lost-timer');
-	  if ( tmo ) {
-	    clearTimeout(tmo);
-	    elem.data('lost-timer', undefined);
-	  }
-	}
-      });
-    },
-
-    /**
-     * Get info about a specific user.
-     * @param {Array} [fields] lists the keys we want to have in the
-     * user objects.  Default is all we have.
-     */
-    user_info: function(fields) {
-      var li = $(this);
-      var user = {};
-
-      if ( !fields || fields.indexOf('id') >= 0 ) {
-	user.id = li.attr("id");
-      }
-      if ( !fields || fields.indexOf('name') >= 0 ) {
-	var name = li.prop("title");
-	if ( name && name !== "Me" )
-	  user.name = name;
-      }
-      if ( !fields || fields.indexOf('avatar') >= 0 ) {
-	user.avatar = li.find("img.avatar").attr("src");
-      }
-
-      return user;
-    },
-
-    /**
-     * Get the set of visible users.  The return is an object holding
-     * a key `self` and a key `users` bound to an array of users.
-     * `self` points to the user of this browser.  Self always has
-     * all keys
-     */
-    users: function(fields) {
-      var users = [];
-      var rc = {users:users};
-
-      this.find("li.user[id]").each(function() {
-	var elem = $(this);
-	var self = elem.hasClass("myself");
-	var user = elem.chat('user_info', self ? undefined : fields);
-
-	if ( self ) {
-	  rc.self = $.extend({}, user);
-	  user.is_self = true;
-	}
-
-	users.push(user);
-      });
-
-      return rc;
-    },
-
-    /**
-     * Get info on the _self_ user.
-     */
-    self: function(fields) {
-      var li = this.find("li.user.myself[id]");
-
-      return li.chat('user_info', fields);
-    },
-
-    /**
-     * Browser `wsid` has opened `file`
-     */
-    addUserFile: function(wsid, file) {
-      var li = $("#"+wsid);
-      var ul = li.find("ul.dropdown-menu");
-      var fli;
-
-      ul.find("li.file").each(function() {
-	if ( $(this).data("file") == file ) {
-	  fli = this;
-	  return false;
-	}
-      });
-
-      if ( fli == undefined ) {
-	var type = file.split(".").pop();
-	ul.append(
-	  $.el.li({class:"file", "data-file":file, title:"Shared file"},
-		  $.el.a($.el.span({class: "dropdown-icon type-icon "+type}),
-			 file)));
-      }
-
-      return this;
-    },
-
-    /**
-     * Remove a file associated with the user wsid.
-     * @param {String} [wsid] User for which to remove file.  If
-     * `undefined`, remove file for all users.
-     * @param {Boolean} [user_too] if `true', remove the user if
-     * the set of files becomes empty and this is not `myself`.
-     */
-    removeUserFile: function(wsid, file, user_too) {
-      var elem = this;
-
-      function removeFile(user_li) {
-	var ul = user_li.children("ul.dropdown-menu");
-
-	ul.find("li.file").each(function() {
-	  if ( $(this).data("file") == file ) {
-	    $(this).remove();
-	    if ( user_too &&
-		 !user_li.hasClass("myself") &&
-		 ul.find("li.file").length == 0 )
-	      elem.chat('removeUser', user_li.attr("id"));
-	    return false;
-	  }
-	});
-      }
-
-      if ( wsid ) {
-	removeFile($("#"+wsid));
-      } else {
-	this.children().each(function() {
-	  removeFile($(this), file, user_too);
-	});
-      }
-    }
-  }; // methods
-
-  // Private functions
-
-  /**
-   * Add an entry for a user to the notification area
-   */
-  function li_user(id, options) {
-    options = options||{};
-    var ul;
-    var a;
-    var name = options.name;
-
-    if ( !name && options.role == "self" )
-      name = "Me";
-    if ( !name )
-      name = id;
-
-    var li = $.el.li({class:"dropdown user", id:id, title:name},
-		   a=$.el.a({ class:"dropdown-toggle avatar",
-			      'data-toggle':"dropdown"
-			    },
-			    avatar(options)),
-		  ul=$.el.ul({ class:"dropdown-menu pull-right",
-			       title:""
-			     }));
-
-    if ( options.role == "self" ) {
-      $(a).append($.el.b({class:"caret"}));
-
-      var input = $.el.input({ type:"text",
-			       placeholder:"Nick name",
-			       value:options.name||"",
-			       title:"Nick name"
-			     });
-      ul.append($.el.li(input));
-      $(input).keypress(function(ev) {
-	if ( ev.which == 13 ) {
-	  var name = $(input).val().trim();
-
-	  if ( name != "" ) {
-	    $("#chat").trigger('send',
-			       { type:'set-nick-name',
-				 name: name
-			       });
-	    preferences.setVal("nick-name", name);
-	  }
-	  $(input).closest('.dropdown.open').removeClass('open');
-	}
-      });
-
-      form.widgets.populateMenu($(li), $("#chat"), {
-/*	"Chat ...": function() {
-	  this.chat('start_chat');
-	}
-*/
-      });
-
-      ul.append($.el.li({class:"divider"}));
-    }
-
-    return li;
-  }
-
-  /**
-   * @return {Number} time since 1/1/1970 in milliseconds
-   */
-  function getTime() {
-    var d = new Date();
-    return d.getTime();
-  }
-
-  /**
-   * <Class description>
-   *
-   * @class chat
-   * @tutorial jquery-doc
-   * @memberOf $.fn
-   * @param {String|Object} [method] Either a method name or the jQuery
-   * plugin initialization object.
-   * @param [...] Zero or more arguments passed to the jQuery `method`
-   */
-
-  $.fn.chat = function(method) {
-    if ( methods[method] ) {
-      return methods[method]
-	.apply(this, Array.prototype.slice.call(arguments, 1));
-    } else if ( typeof method === 'object' || !method ) {
-      return methods._init.apply(this, arguments);
-    } else {
-      $.error('Method ' + method + ' does not exist on jQuery.' + pluginName);
-    }
-  };
-}(jQuery));
-
-  var svg_images = {};
-
-  function avatar(options) {
-    var img;
-
-    if ( options.avatar ) {
-      var m = /(.*\.svg)#(\d+)$/.exec(options.avatar);
-
-      if ( m && m[2] ) {
-	var id  = parseInt(m[2], 10);
-	var url = m[1];
-
-	img = $.el.span({class:"avatar svg"});
-	if ( svg_images[url] ) {
-	  $(img).svg_images[url];
-	  $(img).svgavatar('setAVappearanceByUserID', id);
-	} else {
-	  $.ajax({ url: options.avatar,
-		   type: "GET",
-		   dataType: "text",
-		   success: function(reply) {
-		     $(img).html(reply);
-		     svg_images[url] = reply;
-		     $(img).svgavatar('setAVappearanceByUserID', id);
-		   },
-		   error: function(jqXHR) {
-		     modal.ajaxError(jqXHR);
-		   }
-		 });
-	}
-      } else {
-	img = $.el.img({class:"avatar", src:options.avatar });
-      }
-    } else {
-      img = $.el.span({class:"avatar glyphicon glyphicon-user"})
-    }
-
-    return $.el.div({class:"avatar-container"}, img);
-  }
-
-  return {
-    avatar: avatar
-  };
-});
-
-/*!
- * JQuery Spliter Plugin
- * Copyright (C) 2010-2013 Jakub Jankiewicz <http://jcubic.pl>
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU Lesser General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- */
-(function($, undefined) {
-    var count = 0;
-    var splitter_id = null;
-    var splitters = [];
-    var current_splitter = null;
-    $.fn.split = function(options) {
-        var data = this.data('splitter');
-        if (data) {
-            return data;
-        }
-        var panel_1;
-        var panel_2;
-        var settings = $.extend({
-            limit: 100,
-            orientation: 'horizontal',
-            position: '50%',
-            invisible: false,
-            onDragStart: $.noop,
-            onDragEnd: $.noop,
-            onDrag: $.noop
-        }, options || {});
-        this.settings = settings;
-        var cls;
-        var children = this.children();
-        if (settings.orientation == 'vertical') {
-            panel_1 = children.first().addClass('left_panel');
-            panel_2 = panel_1.next().addClass('right_panel');
-            cls = 'vsplitter';
-        } else if (settings.orientation == 'horizontal') {
-            panel_1 = children.first().addClass('top_panel')
-            panel_2 = panel_1.next().addClass('bottom_panel');
-            cls = 'hsplitter';
-        }
-        if (settings.invisible) {
-            cls += ' splitter-invisible';
-        }
-        var width = this.width();
-        var height = this.height();
-        var id = count++;
-        this.addClass('splitter_panel');
-        var splitter = $('<div/>').addClass(cls).bind('mouseenter touchstart', function() {
-            splitter_id = id;
-        }).bind('mouseleave touchend', function() {
-            splitter_id = null;
-        }).insertAfter(panel_1);
-        var position;
-
-        function get_position(position) {
-            if (typeof position === 'number') {
-                return position;
-            } else if (typeof position === 'string') {
-                var match = position.match(/^([0-9\.]+)(px|%)$/);
-                if (match) {
-                    if (match[2] == 'px') {
-                        return +match[1];
-                    } else {
-                        if (settings.orientation == 'vertical') {
-                            return (width * +match[1]) / 100;
-                        } else if (settings.orientation == 'horizontal') {
-                            return (height * +match[1]) / 100;
-                        }
-                    }
-                } else {
-                    //throw position + ' is invalid value';
-                }
-            } else {
-                //throw 'position have invalid type';
-            }
-        }
-
-        var self = $.extend(this, {
-            refresh: function() {
-                var new_width = this.width();
-                var new_height = this.height();
-                if (width != new_width || height != new_height) {
-                    width = this.width();
-                    height = this.height();
-                    self.position(position);
-                }
-            },
-            position: (function() {
-                if (settings.orientation == 'vertical') {
-                    return function(n, silent) {
-                        if (n === undefined) {
-                            return position;
-                        } else {
-                            position = get_position(n);
-                            var sw = splitter.width();
-                            var sw2 = sw/2;
-                            if (settings.invisible) {
-                                var pw = panel_1.width(position).outerWidth();
-                                panel_2.width(self.width()-pw);
-                                splitter.css('left', pw-sw2);
-                            } else {
-                                var pw = panel_1.width(position-sw2).outerWidth();
-                                panel_2.width(self.width()-pw-sw);
-                                splitter.css('left', pw);
-                            }
-                        }
-                        if (!silent) {
-                            self.find('.splitter_panel').trigger('splitter.resize');
-                        }
-                        return self;
-                    };
-                } else if (settings.orientation == 'horizontal') {
-                    return function(n, silent) {
-                        if (n === undefined) {
-                            return position;
-                        } else {
-                            position = get_position(n);
-                            var sw = splitter.height();
-                            var sw2 = sw/2;
-                            if (settings.invisible) {
-                                var pw = panel_1.height(position).outerHeight();
-                                panel_2.height(self.height()-pw);
-                                splitter.css('top', pw-sw2);
-                            } else {
-                                var pw = panel_1.height(position-sw2).outerHeight();
-                                panel_2.height(self.height()-pw-sw);
-                                splitter.css('top', pw);
-                            }
-                        }
-                        if (!silent) {
-                            self.find('.splitter_panel').trigger('splitter.resize');
-                        }
-                        return self;
-                    };
-                } else {
-                    return $.noop;
-                }
-            })(),
-            orientation: settings.orientation,
-            limit: settings.limit,
-            isActive: function() {
-                return splitter_id === id;
-            },
-            destroy: function() {
-                self.removeClass('splitter_panel');
-                splitter.unbind('mouseenter');
-                splitter.unbind('mouseleave');
-                splitter.unbind('touchstart');
-                splitter.unbind('touchmove');
-                splitter.unbind('touchend');
-                splitter.unbind('touchleave');
-                splitter.unbind('touchcancel');
-                if (settings.orientation == 'vertical') {
-                    panel_1.removeClass('left_panel');
-                    panel_2.removeClass('right_panel');
-                } else if (settings.orientation == 'horizontal') {
-                    panel_1.removeClass('top_panel');
-                    panel_2.removeClass('bottom_panel');
-                }
-                self.unbind('splitter.resize');
-                self.find('.splitter_panel').trigger('splitter.resize');
-                splitters[id] = null;
-                splitter.remove();
-                var not_null = false;
-                for (var i=splitters.length; i--;) {
-                    if (splitters[i] !== null) {
-                        not_null = true;
-                        break;
-                    }
-                }
-                //remove document events when no splitters
-                if (!not_null) {
-                    $(document.documentElement).unbind('.splitter');
-                    $(window).unbind('resize.splitter');
-                    self.data('splitter', null);
-                    splitters = [];
-                    count = 0;
-                }
-            }
-        });
-        self.bind('splitter.resize', function(e) {
-            var pos = self.position();
-            if (self.orientation == 'vertical' &&
-                pos > self.width()) {
-                pos = self.width() - self.limit-1;
-            } else if (self.orientation == 'horizontal' &&
-                       pos > self.height()) {
-                pos = self.height() - self.limit-1;
-            }
-            if (pos < self.limit) {
-                pos = self.limit + 1;
-            }
-            self.position(pos, true);
-        });
-        //inital position of splitter
-        var pos;
-        if (settings.orientation == 'vertical') {
-            if (pos > width-settings.limit) {
-                pos = width-settings.limit;
-            } else {
-                pos = get_position(settings.position);
-            }
-        } else if (settings.orientation == 'horizontal') {
-            //position = height/2;
-            if (pos > height-settings.limit) {
-                pos = height-settings.limit;
-            } else {
-                pos = get_position(settings.position);
-            }
-        }
-        if (pos < settings.limit) {
-            pos = settings.limit;
-        }
-        self.position(pos, true);
-        if (splitters.length == 0) { // first time bind events to document
-            $(window).bind('resize.splitter', function() {
-                $.each(splitters, function(i, splitter) {
-                    if ( splitter ) splitter.refresh();
-                });
-            });
-            $(document.documentElement).bind('mousedown.splitter touchstart.splitter', function(e) {
-                if (splitter_id !== null) {
-                    current_splitter = splitters[splitter_id];
-                    $('<div class="splitterMask"></div>').css('cursor', current_splitter.children().eq(1).css('cursor')).insertAfter(current_splitter);
-                    current_splitter.settings.onDragStart(e);
-                    return false;
-                }
-            }).bind('mouseup.splitter touchend.splitter touchleave.splitter touchcancel.splitter', function(e) {
-                if (current_splitter) {
-                    $('.splitterMask').remove();
-                    current_splitter.settings.onDragEnd(e);
-                    current_splitter = null;
-                }
-            }).bind('mousemove.splitter touchmove.splitter', function(e) {
-                if (current_splitter !== null) {
-                    var limit = current_splitter.limit;
-                    var offset = current_splitter.offset();
-                    if (current_splitter.orientation == 'vertical') {
-                        var pageX = e.pageX;
-                        if(e.originalEvent && e.originalEvent.changedTouches){
-                          pageX = e.originalEvent.changedTouches[0].pageX;
-                        }
-                        var x = pageX - offset.left;
-                        if (x <= current_splitter.limit) {
-                            x = current_splitter.limit + 1;
-                        } else if (x >= current_splitter.width() - limit) {
-                            x = current_splitter.width() - limit - 1;
-                        }
-                        if (x > current_splitter.limit &&
-                            x < current_splitter.width()-limit) {
-                            current_splitter.position(x, true);
-                            current_splitter.find('.splitter_panel').
-                                trigger('splitter.resize');
-                            e.preventDefault();
-                        }
-                    } else if (current_splitter.orientation == 'horizontal') {
-                        var pageY = e.pageY;
-                        if(e.originalEvent && e.originalEvent.changedTouches){
-                          pageY = e.originalEvent.changedTouches[0].pageY;
-                        }
-                        var y = pageY-offset.top;
-                        if (y <= current_splitter.limit) {
-                            y = current_splitter.limit + 1;
-                        } else if (y >= current_splitter.height() - limit) {
-                            y = current_splitter.height() - limit - 1;
-                        }
-                        if (y > current_splitter.limit &&
-                            y < current_splitter.height()-limit) {
-                            current_splitter.position(y, true);
-                            current_splitter.find('.splitter_panel').
-                                trigger('splitter.resize');
-                            e.preventDefault();
-                        }
-                    }
-                    current_splitter.settings.onDrag(e);
-                }
-            });
-        }
-        splitters.push(self);
-        self.data('splitter', self);
-        return self;
-    };
-})(jQuery);
-
-define("splitter", ["jquery"], function(){});
-
-/*  Part of SWISH
-
-    Author:        Jan Wielemaker
-    E-mail:        J.Wielemaker@cs.vu.nl
-    WWW:           http://www.swi-prolog.org
-    Copyright (C): 2014-2016, VU University Amsterdam
-			      CWI Amsterdam
-    All rights reserved.
-
-    Redistribution and use in source and binary forms, with or without
-    modification, are permitted provided that the following conditions
-    are met:
-
-    1. Redistributions of source code must retain the above copyright
-       notice, this list of conditions and the following disclaimer.
-
-    2. Redistributions in binary form must reproduce the above copyright
-       notice, this list of conditions and the following disclaimer in
-       the documentation and/or other materials provided with the
-       distribution.
-
-    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-    "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-    LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
-    FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
-    COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
-    INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
-    BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
-    LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
-    CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-    LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
-    ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
-    POSSIBILITY OF SUCH DAMAGE.
-*/
-
-/**
- * @fileOverview
- * Deal with subwindow layout
- *
- * @version 0.2.0
- * @author Jan Wielemaker, J.Wielemaker@vu.nl
- * @requires jquery
- */
-
-define('pane',[ "jquery", "splitter" ],
-       function() {
-
-(function($) {
-  var pluginName = 'tile';
-
-  /** @lends $.fn.tile */
-  var methods = {
-    /**
-     * @param {Object} [options] currently ignored
-     */
-    _init: function(options) {
-      return this.each(function() {
-	var elem = $(this);
-	var dir   = elem.hasClass("horizontal") ? "vertical" : "horizontal";
-	var pos   = elem.attr("data-split");
-	var panes = elem.children();
-
-	pos = pos||"50%";
-
-	panes.each(function() {
-	  $(this).wrap('<div class="pane-wrapper"></div>')
-	});
-	elem.addClass("pane-container");
-	elem.split({ orientation:dir,
-	             position:pos,
-		     limit:10,
-		     onDragStart: function() { elem.tile('resize_start'); },
-		     onDrag: function(ev) { panes.trigger("pane.resize"); },
-		     onDragEnd: function() { elem.tile('resize_save'); }
-	           });
-	elem.tile('resize_save');
-
-	elem.on('fullscreen', function(ev, val) {
-	  elem.tile('resize');
-	});
-      });
-    },
-
-    resize_start: function() {
-      return this.each(function() {
-	var elem    = $(this);
-	var info    = paneInfo(elem);
-
-	elem.find(".reactive-size").trigger("reactive-resize-start",
-					    info.splitter.orientation);
-      });
-    },
-
-    /**
-     * Save the current split location as a percentage, so we can
-     * maintain this percentage at subsequent resize events.  This
-     * is normally called after establishing the tile and after a
-     * user-initiated resize.
-     */
-    resize_save: function() {
-      this.each(function() {
-	var elem    = $(this);
-	var info    = paneInfo(elem);
-	var length, pos;
-
-	if ( info.splitter.orientation == 'horizontal' ) {
-	  length = elem.height();
-	  pos    = $(info.first).height();
-	} else {
-	  length = elem.width();
-	  pos    = $(info.first).width();
-	}
-
-	var percent = Math.round(((100 * pos) / length)) + "%";
-
-	info.splitter.resizestart = percent;
-      });
-
-      this.find(".reactive-size").trigger("reactive-resize");
-      return this;
-    },
-
-    /**
-     * Act on a resize by keeping the relative distribution and respect
-     * min/max style properties. This assumes that {@link resizestart}
-     * is called at the start of the windowresize.
-     * @example $(window).resize(function() { $(".tile").tile('resize'); });
-     */
-    resize: function() {
-      return this.each(function() {
-	var elem     = $(this);
-	var splitter = elem.split();
-
-	if ( splitter.resizestart ) {
-	  splitter.position(splitter.resizestart);
-	  splitter.settings.onDrag(elem);
-	}
-      });
-    },
-
-    /**
-     * Split a pane, adding a new pane above/below/left/right of the
-     * splitted pane.  `this` must be the pane content!
-     * @param {Element} pane is a `<div>` element providing the content
-     * for the new tile.
-     * @param {String} [rel] is one of `above`/`below`/`left`/`right`.
-     * Default is `"below"`
-     * @param {Number} [pos] is percentage of the height/width taken by
-     * the new pane
-     * @param {Number} [minheight] is the minimum height of the new tab
-     * in the case of a vertical split.
-     * @return {jQuery} parent `pane-container` that hold me and the note
-     * that was added next to me.
-     */
-    split: function(pane, rel, pos, minheight) {
-      rel = rel||"below";
-
-      var relto  = this;
-      var dir    = (rel == "above" || rel == "below") ? "horizontal" : "vertical";
-      var parent = relto.wrap('<div class="pane-container tile "' +
-			      flipdir(dir) +
-			      '></div>')
-                        .parent();
-      var hidden;
-
-      if ( !parent.is(":visible") ) {
-	hidden = parent.closest(".tab-pane");
-	hidden.addClass("active");
-      }
-
-      if ( pos == undefined )
-	pos = 50;
-      else if ( pos < 10 )
-	pos = 10;
-      else if ( pos > 90 )
-	pos = 90;
-
-      if ( minheight && dir == "horizontal" ) {
-	var sumh = this.height();
-	var left = sumh*pos/100;
-	if ( left < minheight && minheight < sumh*0.9 ) {
-	  pos = (minheight*100/sumh);
-	}
-      }
-
-      if ( rel == "above" || rel == "left" ) {
-	parent.prepend(pane);
-      } else {
-	pos = 100 - pos;
-	parent.append(pane);
-      }
-
-      var panes = $(relto).add(pane);
-      panes.wrap('<div class="pane-wrapper"></div>');
-
-      parent.split({ orientation:dir,
-		     position:pos+"%",
-		     limit:10,
-		     onDragStart: function() { parent.tile('resize_start'); },
-		     onDrag:      function() { panes.trigger("pane.resize"); },
-		     onDragEnd:   function() { parent.tile('resize_save'); }
-		   });
-      parent.tile('resize_save');
-      panes.trigger("pane.resize");
-      if ( hidden )
-	hidden.removeClass("active");
-
-      return parent;
-    },
-
-    /**
-     * Remove a tile from the DOM, causing the remaining half to occupy
-     * the whole space.  Again, `this` is the content pane.
-     */
-     close: function() {
-      var pane = this;
-      var splitContainer = pane.closest(".pane-container");
-
-      splitContainer.split().destroy();
-      pane.parent().remove();
-      splitContainer.children().first().children().first().unwrap().unwrap();
-    }
-  }; // methods
-
-  function paneInfo(pane) {
-    var panes = pane.children();
-
-    return { splitter: pane.split(),
-             first:    $(panes[0]).children()[0],
-	     second:   $(panes[2]).children()[0]
-           };
-  }
-
-  function flipdir(dir) {
-    return dir == "horizontal" ? "vertical" : "horizontal";
-  }
-
-  /**
-   * Generate a tiled subwindow layout from a hierarchy of `<div>`
-   * elements.  Below is the HTML that creates the SWISH 2.0 subwindow
-   * layout.  This plugin uses the class `horizontal` or `vertical` to
-   * decide on the direction of the split and the attribute `data-split`
-   * to locate the split location.
-   *
-   *     <div class="tile horizontal" data-split="60%">
-   *       <div class="prolog-editor"></div>
-   *       <div class="tile vertical" data-split="70%">
-   *         <div class="prolog-runners"></div>
-   *         <div class="prolog-query"></div>
-   *       </div>
-   *     </div>
-   *
-   * @class tile
-   * @tutorial jquery-doc
-   * @memberOf $.fn
-   * @example $(".tile").tile();
-   * @param {String|Object} [method] Either a method name or the jQuery
-   * plugin initialization object.
-   * @param [...] Zero or more arguments passed to the jQuery `method`
-   */
-
-  $.fn.tile = function(method) {
-    if ( methods[method] ) {
-      return methods[method]
-	.apply(this, Array.prototype.slice.call(arguments, 1));
-    } else if ( typeof method === 'object' || !method ) {
-      return methods._init.apply(this, arguments);
-    } else {
-      $.error('Method ' + method + ' does not exist on jQuery.' + pluginName);
-    }
-  };
-}(jQuery));
-});
-
-/*!
- * typeahead.js 0.11.1
- * https://github.com/twitter/typeahead.js
- * Copyright 2013-2015 Twitter, Inc. and other contributors; Licensed MIT
- */
-
-(function(root, factory) {
-    if (typeof define === "function" && define.amd) {
-        define("bloodhound", [ "jquery" ], function(a0) {
-            return root["Bloodhound"] = factory(a0);
-        });
-    } else if (typeof exports === "object") {
-        module.exports = factory(require("jquery"));
-    } else {
-        root["Bloodhound"] = factory(jQuery);
-    }
-})(this, function($) {
-    var _ = function() {
-        "use strict";
-        return {
-            isMsie: function() {
-                return /(msie|trident)/i.test(navigator.userAgent) ? navigator.userAgent.match(/(msie |rv:)(\d+(.\d+)?)/i)[2] : false;
-            },
-            isBlankString: function(str) {
-                return !str || /^\s*$/.test(str);
-            },
-            escapeRegExChars: function(str) {
-                return str.replace(/[\-\[\]\/\{\}\(\)\*\+\?\.\\\^\$\|]/g, "\\$&");
-            },
-            isString: function(obj) {
-                return typeof obj === "string";
-            },
-            isNumber: function(obj) {
-                return typeof obj === "number";
-            },
-            isArray: $.isArray,
-            isFunction: $.isFunction,
-            isObject: $.isPlainObject,
-            isUndefined: function(obj) {
-                return typeof obj === "undefined";
-            },
-            isElement: function(obj) {
-                return !!(obj && obj.nodeType === 1);
-            },
-            isJQuery: function(obj) {
-                return obj instanceof $;
-            },
-            toStr: function toStr(s) {
-                return _.isUndefined(s) || s === null ? "" : s + "";
-            },
-            bind: $.proxy,
-            each: function(collection, cb) {
-                $.each(collection, reverseArgs);
-                function reverseArgs(index, value) {
-                    return cb(value, index);
-                }
-            },
-            map: $.map,
-            filter: $.grep,
-            every: function(obj, test) {
-                var result = true;
-                if (!obj) {
-                    return result;
-                }
-                $.each(obj, function(key, val) {
-                    if (!(result = test.call(null, val, key, obj))) {
-                        return false;
-                    }
-                });
-                return !!result;
-            },
-            some: function(obj, test) {
-                var result = false;
-                if (!obj) {
-                    return result;
-                }
-                $.each(obj, function(key, val) {
-                    if (result = test.call(null, val, key, obj)) {
-                        return false;
-                    }
-                });
-                return !!result;
-            },
-            mixin: $.extend,
-            identity: function(x) {
-                return x;
-            },
-            clone: function(obj) {
-                return $.extend(true, {}, obj);
-            },
-            getIdGenerator: function() {
-                var counter = 0;
-                return function() {
-                    return counter++;
-                };
-            },
-            templatify: function templatify(obj) {
-                return $.isFunction(obj) ? obj : template;
-                function template() {
-                    return String(obj);
-                }
-            },
-            defer: function(fn) {
-                setTimeout(fn, 0);
-            },
-            debounce: function(func, wait, immediate) {
-                var timeout, result;
-                return function() {
-                    var context = this, args = arguments, later, callNow;
-                    later = function() {
-                        timeout = null;
-                        if (!immediate) {
-                            result = func.apply(context, args);
-                        }
-                    };
-                    callNow = immediate && !timeout;
-                    clearTimeout(timeout);
-                    timeout = setTimeout(later, wait);
-                    if (callNow) {
-                        result = func.apply(context, args);
-                    }
-                    return result;
-                };
-            },
-            throttle: function(func, wait) {
-                var context, args, timeout, result, previous, later;
-                previous = 0;
-                later = function() {
-                    previous = new Date();
-                    timeout = null;
-                    result = func.apply(context, args);
-                };
-                return function() {
-                    var now = new Date(), remaining = wait - (now - previous);
-                    context = this;
-                    args = arguments;
-                    if (remaining <= 0) {
-                        clearTimeout(timeout);
-                        timeout = null;
-                        previous = now;
-                        result = func.apply(context, args);
-                    } else if (!timeout) {
-                        timeout = setTimeout(later, remaining);
-                    }
-                    return result;
-                };
-            },
-            stringify: function(val) {
-                return _.isString(val) ? val : JSON.stringify(val);
-            },
-            noop: function() {}
-        };
-    }();
-    var VERSION = "0.11.1";
-    var tokenizers = function() {
-        "use strict";
-        return {
-            nonword: nonword,
-            whitespace: whitespace,
-            obj: {
-                nonword: getObjTokenizer(nonword),
-                whitespace: getObjTokenizer(whitespace)
-            }
-        };
-        function whitespace(str) {
-            str = _.toStr(str);
-            return str ? str.split(/\s+/) : [];
-        }
-        function nonword(str) {
-            str = _.toStr(str);
-            return str ? str.split(/\W+/) : [];
-        }
-        function getObjTokenizer(tokenizer) {
-            return function setKey(keys) {
-                keys = _.isArray(keys) ? keys : [].slice.call(arguments, 0);
-                return function tokenize(o) {
-                    var tokens = [];
-                    _.each(keys, function(k) {
-                        tokens = tokens.concat(tokenizer(_.toStr(o[k])));
-                    });
-                    return tokens;
-                };
-            };
-        }
-    }();
-    var LruCache = function() {
-        "use strict";
-        function LruCache(maxSize) {
-            this.maxSize = _.isNumber(maxSize) ? maxSize : 100;
-            this.reset();
-            if (this.maxSize <= 0) {
-                this.set = this.get = $.noop;
-            }
-        }
-        _.mixin(LruCache.prototype, {
-            set: function set(key, val) {
-                var tailItem = this.list.tail, node;
-                if (this.size >= this.maxSize) {
-                    this.list.remove(tailItem);
-                    delete this.hash[tailItem.key];
-                    this.size--;
-                }
-                if (node = this.hash[key]) {
-                    node.val = val;
-                    this.list.moveToFront(node);
-                } else {
-                    node = new Node(key, val);
-                    this.list.add(node);
-                    this.hash[key] = node;
-                    this.size++;
-                }
-            },
-            get: function get(key) {
-                var node = this.hash[key];
-                if (node) {
-                    this.list.moveToFront(node);
-                    return node.val;
-                }
-            },
-            reset: function reset() {
-                this.size = 0;
-                this.hash = {};
-                this.list = new List();
-            }
-        });
-        function List() {
-            this.head = this.tail = null;
-        }
-        _.mixin(List.prototype, {
-            add: function add(node) {
-                if (this.head) {
-                    node.next = this.head;
-                    this.head.prev = node;
-                }
-                this.head = node;
-                this.tail = this.tail || node;
-            },
-            remove: function remove(node) {
-                node.prev ? node.prev.next = node.next : this.head = node.next;
-                node.next ? node.next.prev = node.prev : this.tail = node.prev;
-            },
-            moveToFront: function(node) {
-                this.remove(node);
-                this.add(node);
-            }
-        });
-        function Node(key, val) {
-            this.key = key;
-            this.val = val;
-            this.prev = this.next = null;
-        }
-        return LruCache;
-    }();
-    var PersistentStorage = function() {
-        "use strict";
-        var LOCAL_STORAGE;
-        try {
-            LOCAL_STORAGE = window.localStorage;
-            LOCAL_STORAGE.setItem("~~~", "!");
-            LOCAL_STORAGE.removeItem("~~~");
-        } catch (err) {
-            LOCAL_STORAGE = null;
-        }
-        function PersistentStorage(namespace, override) {
-            this.prefix = [ "__", namespace, "__" ].join("");
-            this.ttlKey = "__ttl__";
-            this.keyMatcher = new RegExp("^" + _.escapeRegExChars(this.prefix));
-            this.ls = override || LOCAL_STORAGE;
-            !this.ls && this._noop();
-        }
-        _.mixin(PersistentStorage.prototype, {
-            _prefix: function(key) {
-                return this.prefix + key;
-            },
-            _ttlKey: function(key) {
-                return this._prefix(key) + this.ttlKey;
-            },
-            _noop: function() {
-                this.get = this.set = this.remove = this.clear = this.isExpired = _.noop;
-            },
-            _safeSet: function(key, val) {
-                try {
-                    this.ls.setItem(key, val);
-                } catch (err) {
-                    if (err.name === "QuotaExceededError") {
-                        this.clear();
-                        this._noop();
-                    }
-                }
-            },
-            get: function(key) {
-                if (this.isExpired(key)) {
-                    this.remove(key);
-                }
-                return decode(this.ls.getItem(this._prefix(key)));
-            },
-            set: function(key, val, ttl) {
-                if (_.isNumber(ttl)) {
-                    this._safeSet(this._ttlKey(key), encode(now() + ttl));
-                } else {
-                    this.ls.removeItem(this._ttlKey(key));
-                }
-                return this._safeSet(this._prefix(key), encode(val));
-            },
-            remove: function(key) {
-                this.ls.removeItem(this._ttlKey(key));
-                this.ls.removeItem(this._prefix(key));
-                return this;
-            },
-            clear: function() {
-                var i, keys = gatherMatchingKeys(this.keyMatcher);
-                for (i = keys.length; i--; ) {
-                    this.remove(keys[i]);
-                }
-                return this;
-            },
-            isExpired: function(key) {
-                var ttl = decode(this.ls.getItem(this._ttlKey(key)));
-                return _.isNumber(ttl) && now() > ttl ? true : false;
-            }
-        });
-        return PersistentStorage;
-        function now() {
-            return new Date().getTime();
-        }
-        function encode(val) {
-            return JSON.stringify(_.isUndefined(val) ? null : val);
-        }
-        function decode(val) {
-            return $.parseJSON(val);
-        }
-        function gatherMatchingKeys(keyMatcher) {
-            var i, key, keys = [], len = LOCAL_STORAGE.length;
-            for (i = 0; i < len; i++) {
-                if ((key = LOCAL_STORAGE.key(i)).match(keyMatcher)) {
-                    keys.push(key.replace(keyMatcher, ""));
-                }
-            }
-            return keys;
-        }
-    }();
-    var Transport = function() {
-        "use strict";
-        var pendingRequestsCount = 0, pendingRequests = {}, maxPendingRequests = 6, sharedCache = new LruCache(10);
-        function Transport(o) {
-            o = o || {};
-            this.cancelled = false;
-            this.lastReq = null;
-            this._send = o.transport;
-            this._get = o.limiter ? o.limiter(this._get) : this._get;
-            this._cache = o.cache === false ? new LruCache(0) : sharedCache;
-        }
-        Transport.setMaxPendingRequests = function setMaxPendingRequests(num) {
-            maxPendingRequests = num;
-        };
-        Transport.resetCache = function resetCache() {
-            sharedCache.reset();
-        };
-        _.mixin(Transport.prototype, {
-            _fingerprint: function fingerprint(o) {
-                o = o || {};
-                return o.url + o.type + $.param(o.data || {});
-            },
-            _get: function(o, cb) {
-                var that = this, fingerprint, jqXhr;
-                fingerprint = this._fingerprint(o);
-                if (this.cancelled || fingerprint !== this.lastReq) {
-                    return;
-                }
-                if (jqXhr = pendingRequests[fingerprint]) {
-                    jqXhr.done(done).fail(fail);
-                } else if (pendingRequestsCount < maxPendingRequests) {
-                    pendingRequestsCount++;
-                    pendingRequests[fingerprint] = this._send(o).done(done).fail(fail).always(always);
-                } else {
-                    this.onDeckRequestArgs = [].slice.call(arguments, 0);
-                }
-                function done(resp) {
-                    cb(null, resp);
-                    that._cache.set(fingerprint, resp);
-                }
-                function fail() {
-                    cb(true);
-                }
-                function always() {
-                    pendingRequestsCount--;
-                    delete pendingRequests[fingerprint];
-                    if (that.onDeckRequestArgs) {
-                        that._get.apply(that, that.onDeckRequestArgs);
-                        that.onDeckRequestArgs = null;
-                    }
-                }
-            },
-            get: function(o, cb) {
-                var resp, fingerprint;
-                cb = cb || $.noop;
-                o = _.isString(o) ? {
-                    url: o
-                } : o || {};
-                fingerprint = this._fingerprint(o);
-                this.cancelled = false;
-                this.lastReq = fingerprint;
-                if (resp = this._cache.get(fingerprint)) {
-                    cb(null, resp);
-                } else {
-                    this._get(o, cb);
-                }
-            },
-            cancel: function() {
-                this.cancelled = true;
-            }
-        });
-        return Transport;
-    }();
-    var SearchIndex = window.SearchIndex = function() {
-        "use strict";
-        var CHILDREN = "c", IDS = "i";
-        function SearchIndex(o) {
-            o = o || {};
-            if (!o.datumTokenizer || !o.queryTokenizer) {
-                $.error("datumTokenizer and queryTokenizer are both required");
-            }
-            this.identify = o.identify || _.stringify;
-            this.datumTokenizer = o.datumTokenizer;
-            this.queryTokenizer = o.queryTokenizer;
-            this.reset();
-        }
-        _.mixin(SearchIndex.prototype, {
-            bootstrap: function bootstrap(o) {
-                this.datums = o.datums;
-                this.trie = o.trie;
-            },
-            add: function(data) {
-                var that = this;
-                data = _.isArray(data) ? data : [ data ];
-                _.each(data, function(datum) {
-                    var id, tokens;
-                    that.datums[id = that.identify(datum)] = datum;
-                    tokens = normalizeTokens(that.datumTokenizer(datum));
-                    _.each(tokens, function(token) {
-                        var node, chars, ch;
-                        node = that.trie;
-                        chars = token.split("");
-                        while (ch = chars.shift()) {
-                            node = node[CHILDREN][ch] || (node[CHILDREN][ch] = newNode());
-                            node[IDS].push(id);
-                        }
-                    });
-                });
-            },
-            get: function get(ids) {
-                var that = this;
-                return _.map(ids, function(id) {
-                    return that.datums[id];
-                });
-            },
-            search: function search(query) {
-                var that = this, tokens, matches;
-                tokens = normalizeTokens(this.queryTokenizer(query));
-                _.each(tokens, function(token) {
-                    var node, chars, ch, ids;
-                    if (matches && matches.length === 0) {
-                        return false;
-                    }
-                    node = that.trie;
-                    chars = token.split("");
-                    while (node && (ch = chars.shift())) {
-                        node = node[CHILDREN][ch];
-                    }
-                    if (node && chars.length === 0) {
-                        ids = node[IDS].slice(0);
-                        matches = matches ? getIntersection(matches, ids) : ids;
-                    } else {
-                        matches = [];
-                        return false;
-                    }
-                });
-                return matches ? _.map(unique(matches), function(id) {
-                    return that.datums[id];
-                }) : [];
-            },
-            all: function all() {
-                var values = [];
-                for (var key in this.datums) {
-                    values.push(this.datums[key]);
-                }
-                return values;
-            },
-            reset: function reset() {
-                this.datums = {};
-                this.trie = newNode();
-            },
-            serialize: function serialize() {
-                return {
-                    datums: this.datums,
-                    trie: this.trie
-                };
-            }
-        });
-        return SearchIndex;
-        function normalizeTokens(tokens) {
-            tokens = _.filter(tokens, function(token) {
-                return !!token;
-            });
-            tokens = _.map(tokens, function(token) {
-                return token.toLowerCase();
-            });
-            return tokens;
-        }
-        function newNode() {
-            var node = {};
-            node[IDS] = [];
-            node[CHILDREN] = {};
-            return node;
-        }
-        function unique(array) {
-            var seen = {}, uniques = [];
-            for (var i = 0, len = array.length; i < len; i++) {
-                if (!seen[array[i]]) {
-                    seen[array[i]] = true;
-                    uniques.push(array[i]);
-                }
-            }
-            return uniques;
-        }
-        function getIntersection(arrayA, arrayB) {
-            var ai = 0, bi = 0, intersection = [];
-            arrayA = arrayA.sort();
-            arrayB = arrayB.sort();
-            var lenArrayA = arrayA.length, lenArrayB = arrayB.length;
-            while (ai < lenArrayA && bi < lenArrayB) {
-                if (arrayA[ai] < arrayB[bi]) {
-                    ai++;
-                } else if (arrayA[ai] > arrayB[bi]) {
-                    bi++;
-                } else {
-                    intersection.push(arrayA[ai]);
-                    ai++;
-                    bi++;
-                }
-            }
-            return intersection;
-        }
-    }();
-    var Prefetch = function() {
-        "use strict";
-        var keys;
-        keys = {
-            data: "data",
-            protocol: "protocol",
-            thumbprint: "thumbprint"
-        };
-        function Prefetch(o) {
-            this.url = o.url;
-            this.ttl = o.ttl;
-            this.cache = o.cache;
-            this.prepare = o.prepare;
-            this.transform = o.transform;
-            this.transport = o.transport;
-            this.thumbprint = o.thumbprint;
-            this.storage = new PersistentStorage(o.cacheKey);
-        }
-        _.mixin(Prefetch.prototype, {
-            _settings: function settings() {
-                return {
-                    url: this.url,
-                    type: "GET",
-                    dataType: "json"
-                };
-            },
-            store: function store(data) {
-                if (!this.cache) {
-                    return;
-                }
-                this.storage.set(keys.data, data, this.ttl);
-                this.storage.set(keys.protocol, location.protocol, this.ttl);
-                this.storage.set(keys.thumbprint, this.thumbprint, this.ttl);
-            },
-            fromCache: function fromCache() {
-                var stored = {}, isExpired;
-                if (!this.cache) {
-                    return null;
-                }
-                stored.data = this.storage.get(keys.data);
-                stored.protocol = this.storage.get(keys.protocol);
-                stored.thumbprint = this.storage.get(keys.thumbprint);
-                isExpired = stored.thumbprint !== this.thumbprint || stored.protocol !== location.protocol;
-                return stored.data && !isExpired ? stored.data : null;
-            },
-            fromNetwork: function(cb) {
-                var that = this, settings;
-                if (!cb) {
-                    return;
-                }
-                settings = this.prepare(this._settings());
-                this.transport(settings).fail(onError).done(onResponse);
-                function onError() {
-                    cb(true);
-                }
-                function onResponse(resp) {
-                    cb(null, that.transform(resp));
-                }
-            },
-            clear: function clear() {
-                this.storage.clear();
-                return this;
-            }
-        });
-        return Prefetch;
-    }();
-    var Remote = function() {
-        "use strict";
-        function Remote(o) {
-            this.url = o.url;
-            this.prepare = o.prepare;
-            this.transform = o.transform;
-            this.transport = new Transport({
-                cache: o.cache,
-                limiter: o.limiter,
-                transport: o.transport
-            });
-        }
-        _.mixin(Remote.prototype, {
-            _settings: function settings() {
-                return {
-                    url: this.url,
-                    type: "GET",
-                    dataType: "json"
-                };
-            },
-            get: function get(query, cb) {
-                var that = this, settings;
-                if (!cb) {
-                    return;
-                }
-                query = query || "";
-                settings = this.prepare(query, this._settings());
-                return this.transport.get(settings, onResponse);
-                function onResponse(err, resp) {
-                    err ? cb([]) : cb(that.transform(resp));
-                }
-            },
-            cancelLastRequest: function cancelLastRequest() {
-                this.transport.cancel();
-            }
-        });
-        return Remote;
-    }();
-    var oParser = function() {
-        "use strict";
-        return function parse(o) {
-            var defaults, sorter;
-            defaults = {
-                initialize: true,
-                identify: _.stringify,
-                datumTokenizer: null,
-                queryTokenizer: null,
-                sufficient: 5,
-                sorter: null,
-                local: [],
-                prefetch: null,
-                remote: null
-            };
-            o = _.mixin(defaults, o || {});
-            !o.datumTokenizer && $.error("datumTokenizer is required");
-            !o.queryTokenizer && $.error("queryTokenizer is required");
-            sorter = o.sorter;
-            o.sorter = sorter ? function(x) {
-                return x.sort(sorter);
-            } : _.identity;
-            o.local = _.isFunction(o.local) ? o.local() : o.local;
-            o.prefetch = parsePrefetch(o.prefetch);
-            o.remote = parseRemote(o.remote);
-            return o;
-        };
-        function parsePrefetch(o) {
-            var defaults;
-            if (!o) {
-                return null;
-            }
-            defaults = {
-                url: null,
-                ttl: 24 * 60 * 60 * 1e3,
-                cache: true,
-                cacheKey: null,
-                thumbprint: "",
-                prepare: _.identity,
-                transform: _.identity,
-                transport: null
-            };
-            o = _.isString(o) ? {
-                url: o
-            } : o;
-            o = _.mixin(defaults, o);
-            !o.url && $.error("prefetch requires url to be set");
-            o.transform = o.filter || o.transform;
-            o.cacheKey = o.cacheKey || o.url;
-            o.thumbprint = VERSION + o.thumbprint;
-            o.transport = o.transport ? callbackToDeferred(o.transport) : $.ajax;
-            return o;
-        }
-        function parseRemote(o) {
-            var defaults;
-            if (!o) {
-                return;
-            }
-            defaults = {
-                url: null,
-                cache: true,
-                prepare: null,
-                replace: null,
-                wildcard: null,
-                limiter: null,
-                rateLimitBy: "debounce",
-                rateLimitWait: 300,
-                transform: _.identity,
-                transport: null
-            };
-            o = _.isString(o) ? {
-                url: o
-            } : o;
-            o = _.mixin(defaults, o);
-            !o.url && $.error("remote requires url to be set");
-            o.transform = o.filter || o.transform;
-            o.prepare = toRemotePrepare(o);
-            o.limiter = toLimiter(o);
-            o.transport = o.transport ? callbackToDeferred(o.transport) : $.ajax;
-            delete o.replace;
-            delete o.wildcard;
-            delete o.rateLimitBy;
-            delete o.rateLimitWait;
-            return o;
-        }
-        function toRemotePrepare(o) {
-            var prepare, replace, wildcard;
-            prepare = o.prepare;
-            replace = o.replace;
-            wildcard = o.wildcard;
-            if (prepare) {
-                return prepare;
-            }
-            if (replace) {
-                prepare = prepareByReplace;
-            } else if (o.wildcard) {
-                prepare = prepareByWildcard;
-            } else {
-                prepare = idenityPrepare;
-            }
-            return prepare;
-            function prepareByReplace(query, settings) {
-                settings.url = replace(settings.url, query);
-                return settings;
-            }
-            function prepareByWildcard(query, settings) {
-                settings.url = settings.url.replace(wildcard, encodeURIComponent(query));
-                return settings;
-            }
-            function idenityPrepare(query, settings) {
-                return settings;
-            }
-        }
-        function toLimiter(o) {
-            var limiter, method, wait;
-            limiter = o.limiter;
-            method = o.rateLimitBy;
-            wait = o.rateLimitWait;
-            if (!limiter) {
-                limiter = /^throttle$/i.test(method) ? throttle(wait) : debounce(wait);
-            }
-            return limiter;
-            function debounce(wait) {
-                return function debounce(fn) {
-                    return _.debounce(fn, wait);
-                };
-            }
-            function throttle(wait) {
-                return function throttle(fn) {
-                    return _.throttle(fn, wait);
-                };
-            }
-        }
-        function callbackToDeferred(fn) {
-            return function wrapper(o) {
-                var deferred = $.Deferred();
-                fn(o, onSuccess, onError);
-                return deferred;
-                function onSuccess(resp) {
-                    _.defer(function() {
-                        deferred.resolve(resp);
-                    });
-                }
-                function onError(err) {
-                    _.defer(function() {
-                        deferred.reject(err);
-                    });
-                }
-            };
-        }
-    }();
-    var Bloodhound = function() {
-        "use strict";
-        var old;
-        old = window && window.Bloodhound;
-        function Bloodhound(o) {
-            o = oParser(o);
-            this.sorter = o.sorter;
-            this.identify = o.identify;
-            this.sufficient = o.sufficient;
-            this.local = o.local;
-            this.remote = o.remote ? new Remote(o.remote) : null;
-            this.prefetch = o.prefetch ? new Prefetch(o.prefetch) : null;
-            this.index = new SearchIndex({
-                identify: this.identify,
-                datumTokenizer: o.datumTokenizer,
-                queryTokenizer: o.queryTokenizer
-            });
-            o.initialize !== false && this.initialize();
-        }
-        Bloodhound.noConflict = function noConflict() {
-            window && (window.Bloodhound = old);
-            return Bloodhound;
-        };
-        Bloodhound.tokenizers = tokenizers;
-        _.mixin(Bloodhound.prototype, {
-            __ttAdapter: function ttAdapter() {
-                var that = this;
-                return this.remote ? withAsync : withoutAsync;
-                function withAsync(query, sync, async) {
-                    return that.search(query, sync, async);
-                }
-                function withoutAsync(query, sync) {
-                    return that.search(query, sync);
-                }
-            },
-            _loadPrefetch: function loadPrefetch() {
-                var that = this, deferred, serialized;
-                deferred = $.Deferred();
-                if (!this.prefetch) {
-                    deferred.resolve();
-                } else if (serialized = this.prefetch.fromCache()) {
-                    this.index.bootstrap(serialized);
-                    deferred.resolve();
-                } else {
-                    this.prefetch.fromNetwork(done);
-                }
-                return deferred.promise();
-                function done(err, data) {
-                    if (err) {
-                        return deferred.reject();
-                    }
-                    that.add(data);
-                    that.prefetch.store(that.index.serialize());
-                    deferred.resolve();
-                }
-            },
-            _initialize: function initialize() {
-                var that = this, deferred;
-                this.clear();
-                (this.initPromise = this._loadPrefetch()).done(addLocalToIndex);
-                return this.initPromise;
-                function addLocalToIndex() {
-                    that.add(that.local);
-                }
-            },
-            initialize: function initialize(force) {
-                return !this.initPromise || force ? this._initialize() : this.initPromise;
-            },
-            add: function add(data) {
-                this.index.add(data);
-                return this;
-            },
-            get: function get(ids) {
-                ids = _.isArray(ids) ? ids : [].slice.call(arguments);
-                return this.index.get(ids);
-            },
-            search: function search(query, sync, async) {
-                var that = this, local;
-                local = this.sorter(this.index.search(query));
-                sync(this.remote ? local.slice() : local);
-                if (this.remote && local.length < this.sufficient) {
-                    this.remote.get(query, processRemote);
-                } else if (this.remote) {
-                    this.remote.cancelLastRequest();
-                }
-                return this;
-                function processRemote(remote) {
-                    var nonDuplicates = [];
-                    _.each(remote, function(r) {
-                        !_.some(local, function(l) {
-                            return that.identify(r) === that.identify(l);
-                        }) && nonDuplicates.push(r);
-                    });
-                    async && async(nonDuplicates);
-                }
-            },
-            all: function all() {
-                return this.index.all();
-            },
-            clear: function clear() {
-                this.index.reset();
-                return this;
-            },
-            clearPrefetchCache: function clearPrefetchCache() {
-                this.prefetch && this.prefetch.clear();
-                return this;
-            },
-            clearRemoteCache: function clearRemoteCache() {
-                Transport.resetCache();
-                return this;
-            },
-            ttAdapter: function ttAdapter() {
-                return this.__ttAdapter();
-            }
-        });
-        return Bloodhound;
-    }();
-    return Bloodhound;
-});
-/*!
- * typeahead.js 0.11.1
- * https://github.com/twitter/typeahead.js
- * Copyright 2013-2015 Twitter, Inc. and other contributors; Licensed MIT
- */
-
-(function(root, factory) {
-    if (typeof define === "function" && define.amd) {
-        define("typeahead.js", [ "jquery" ], function(a0) {
-            return factory(a0);
-        });
-    } else if (typeof exports === "object") {
-        module.exports = factory(require("jquery"));
-    } else {
-        factory(jQuery);
-    }
-})(this, function($) {
-    var _ = function() {
-        "use strict";
-        return {
-            isMsie: function() {
-                return /(msie|trident)/i.test(navigator.userAgent) ? navigator.userAgent.match(/(msie |rv:)(\d+(.\d+)?)/i)[2] : false;
-            },
-            isBlankString: function(str) {
-                return !str || /^\s*$/.test(str);
-            },
-            escapeRegExChars: function(str) {
-                return str.replace(/[\-\[\]\/\{\}\(\)\*\+\?\.\\\^\$\|]/g, "\\$&");
-            },
-            isString: function(obj) {
-                return typeof obj === "string";
-            },
-            isNumber: function(obj) {
-                return typeof obj === "number";
-            },
-            isArray: $.isArray,
-            isFunction: $.isFunction,
-            isObject: $.isPlainObject,
-            isUndefined: function(obj) {
-                return typeof obj === "undefined";
-            },
-            isElement: function(obj) {
-                return !!(obj && obj.nodeType === 1);
-            },
-            isJQuery: function(obj) {
-                return obj instanceof $;
-            },
-            toStr: function toStr(s) {
-                return _.isUndefined(s) || s === null ? "" : s + "";
-            },
-            bind: $.proxy,
-            each: function(collection, cb) {
-                $.each(collection, reverseArgs);
-                function reverseArgs(index, value) {
-                    return cb(value, index);
-                }
-            },
-            map: $.map,
-            filter: $.grep,
-            every: function(obj, test) {
-                var result = true;
-                if (!obj) {
-                    return result;
-                }
-                $.each(obj, function(key, val) {
-                    if (!(result = test.call(null, val, key, obj))) {
-                        return false;
-                    }
-                });
-                return !!result;
-            },
-            some: function(obj, test) {
-                var result = false;
-                if (!obj) {
-                    return result;
-                }
-                $.each(obj, function(key, val) {
-                    if (result = test.call(null, val, key, obj)) {
-                        return false;
-                    }
-                });
-                return !!result;
-            },
-            mixin: $.extend,
-            identity: function(x) {
-                return x;
-            },
-            clone: function(obj) {
-                return $.extend(true, {}, obj);
-            },
-            getIdGenerator: function() {
-                var counter = 0;
-                return function() {
-                    return counter++;
-                };
-            },
-            templatify: function templatify(obj) {
-                return $.isFunction(obj) ? obj : template;
-                function template() {
-                    return String(obj);
-                }
-            },
-            defer: function(fn) {
-                setTimeout(fn, 0);
-            },
-            debounce: function(func, wait, immediate) {
-                var timeout, result;
-                return function() {
-                    var context = this, args = arguments, later, callNow;
-                    later = function() {
-                        timeout = null;
-                        if (!immediate) {
-                            result = func.apply(context, args);
-                        }
-                    };
-                    callNow = immediate && !timeout;
-                    clearTimeout(timeout);
-                    timeout = setTimeout(later, wait);
-                    if (callNow) {
-                        result = func.apply(context, args);
-                    }
-                    return result;
-                };
-            },
-            throttle: function(func, wait) {
-                var context, args, timeout, result, previous, later;
-                previous = 0;
-                later = function() {
-                    previous = new Date();
-                    timeout = null;
-                    result = func.apply(context, args);
-                };
-                return function() {
-                    var now = new Date(), remaining = wait - (now - previous);
-                    context = this;
-                    args = arguments;
-                    if (remaining <= 0) {
-                        clearTimeout(timeout);
-                        timeout = null;
-                        previous = now;
-                        result = func.apply(context, args);
-                    } else if (!timeout) {
-                        timeout = setTimeout(later, remaining);
-                    }
-                    return result;
-                };
-            },
-            stringify: function(val) {
-                return _.isString(val) ? val : JSON.stringify(val);
-            },
-            noop: function() {}
-        };
-    }();
-    var WWW = function() {
-        "use strict";
-        var defaultClassNames = {
-            wrapper: "twitter-typeahead",
-            input: "tt-input",
-            hint: "tt-hint",
-            menu: "tt-menu",
-            dataset: "tt-dataset",
-            suggestion: "tt-suggestion",
-            selectable: "tt-selectable",
-            empty: "tt-empty",
-            open: "tt-open",
-            cursor: "tt-cursor",
-            highlight: "tt-highlight"
-        };
-        return build;
-        function build(o) {
-            var www, classes;
-            classes = _.mixin({}, defaultClassNames, o);
-            www = {
-                css: buildCss(),
-                classes: classes,
-                html: buildHtml(classes),
-                selectors: buildSelectors(classes)
-            };
-            return {
-                css: www.css,
-                html: www.html,
-                classes: www.classes,
-                selectors: www.selectors,
-                mixin: function(o) {
-                    _.mixin(o, www);
-                }
-            };
-        }
-        function buildHtml(c) {
-            return {
-                wrapper: '<span class="' + c.wrapper + '"></span>',
-                menu: '<div class="' + c.menu + '"></div>'
-            };
-        }
-        function buildSelectors(classes) {
-            var selectors = {};
-            _.each(classes, function(v, k) {
-                selectors[k] = "." + v;
-            });
-            return selectors;
-        }
-        function buildCss() {
-            var css = {
-                wrapper: {
-                    position: "relative",
-                    display: "inline-block"
-                },
-                hint: {
-                    position: "absolute",
-                    top: "0",
-                    left: "0",
-                    borderColor: "transparent",
-                    boxShadow: "none",
-                    opacity: "1"
-                },
-                input: {
-                    position: "relative",
-                    verticalAlign: "top",
-                    backgroundColor: "transparent"
-                },
-                inputWithNoHint: {
-                    position: "relative",
-                    verticalAlign: "top"
-                },
-                menu: {
-                    position: "absolute",
-                    top: "100%",
-                    left: "0",
-                    zIndex: "100",
-                    display: "none"
-                },
-                ltr: {
-                    left: "0",
-                    right: "auto"
-                },
-                rtl: {
-                    left: "auto",
-                    right: " 0"
-                }
-            };
-            if (_.isMsie()) {
-                _.mixin(css.input, {
-                    backgroundImage: "url(data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)"
-                });
-            }
-            return css;
-        }
-    }();
-    var EventBus = function() {
-        "use strict";
-        var namespace, deprecationMap;
-        namespace = "typeahead:";
-        deprecationMap = {
-            render: "rendered",
-            cursorchange: "cursorchanged",
-            select: "selected",
-            autocomplete: "autocompleted"
-        };
-        function EventBus(o) {
-            if (!o || !o.el) {
-                $.error("EventBus initialized without el");
-            }
-            this.$el = $(o.el);
-        }
-        _.mixin(EventBus.prototype, {
-            _trigger: function(type, args) {
-                var $e;
-                $e = $.Event(namespace + type);
-                (args = args || []).unshift($e);
-                this.$el.trigger.apply(this.$el, args);
-                return $e;
-            },
-            before: function(type) {
-                var args, $e;
-                args = [].slice.call(arguments, 1);
-                $e = this._trigger("before" + type, args);
-                return $e.isDefaultPrevented();
-            },
-            trigger: function(type) {
-                var deprecatedType;
-                this._trigger(type, [].slice.call(arguments, 1));
-                if (deprecatedType = deprecationMap[type]) {
-                    this._trigger(deprecatedType, [].slice.call(arguments, 1));
-                }
-            }
-        });
-        return EventBus;
-    }();
-    var EventEmitter = function() {
-        "use strict";
-        var splitter = /\s+/, nextTick = getNextTick();
-        return {
-            onSync: onSync,
-            onAsync: onAsync,
-            off: off,
-            trigger: trigger
-        };
-        function on(method, types, cb, context) {
-            var type;
-            if (!cb) {
-                return this;
-            }
-            types = types.split(splitter);
-            cb = context ? bindContext(cb, context) : cb;
-            this._callbacks = this._callbacks || {};
-            while (type = types.shift()) {
-                this._callbacks[type] = this._callbacks[type] || {
-                    sync: [],
-                    async: []
-                };
-                this._callbacks[type][method].push(cb);
-            }
-            return this;
-        }
-        function onAsync(types, cb, context) {
-            return on.call(this, "async", types, cb, context);
-        }
-        function onSync(types, cb, context) {
-            return on.call(this, "sync", types, cb, context);
-        }
-        function off(types) {
-            var type;
-            if (!this._callbacks) {
-                return this;
-            }
-            types = types.split(splitter);
-            while (type = types.shift()) {
-                delete this._callbacks[type];
-            }
-            return this;
-        }
-        function trigger(types) {
-            var type, callbacks, args, syncFlush, asyncFlush;
-            if (!this._callbacks) {
-                return this;
-            }
-            types = types.split(splitter);
-            args = [].slice.call(arguments, 1);
-            while ((type = types.shift()) && (callbacks = this._callbacks[type])) {
-                syncFlush = getFlush(callbacks.sync, this, [ type ].concat(args));
-                asyncFlush = getFlush(callbacks.async, this, [ type ].concat(args));
-                syncFlush() && nextTick(asyncFlush);
-            }
-            return this;
-        }
-        function getFlush(callbacks, context, args) {
-            return flush;
-            function flush() {
-                var cancelled;
-                for (var i = 0, len = callbacks.length; !cancelled && i < len; i += 1) {
-                    cancelled = callbacks[i].apply(context, args) === false;
-                }
-                return !cancelled;
-            }
-        }
-        function getNextTick() {
-            var nextTickFn;
-            if (window.setImmediate) {
-                nextTickFn = function nextTickSetImmediate(fn) {
-                    setImmediate(function() {
-                        fn();
-                    });
-                };
-            } else {
-                nextTickFn = function nextTickSetTimeout(fn) {
-                    setTimeout(function() {
-                        fn();
-                    }, 0);
-                };
-            }
-            return nextTickFn;
-        }
-        function bindContext(fn, context) {
-            return fn.bind ? fn.bind(context) : function() {
-                fn.apply(context, [].slice.call(arguments, 0));
-            };
-        }
-    }();
-    var highlight = function(doc) {
-        "use strict";
-        var defaults = {
-            node: null,
-            pattern: null,
-            tagName: "strong",
-            className: null,
-            wordsOnly: false,
-            caseSensitive: false
-        };
-        return function hightlight(o) {
-            var regex;
-            o = _.mixin({}, defaults, o);
-            if (!o.node || !o.pattern) {
-                return;
-            }
-            o.pattern = _.isArray(o.pattern) ? o.pattern : [ o.pattern ];
-            regex = getRegex(o.pattern, o.caseSensitive, o.wordsOnly);
-            traverse(o.node, hightlightTextNode);
-            function hightlightTextNode(textNode) {
-                var match, patternNode, wrapperNode;
-                if (match = regex.exec(textNode.data)) {
-                    wrapperNode = doc.createElement(o.tagName);
-                    o.className && (wrapperNode.className = o.className);
-                    patternNode = textNode.splitText(match.index);
-                    patternNode.splitText(match[0].length);
-                    wrapperNode.appendChild(patternNode.cloneNode(true));
-                    textNode.parentNode.replaceChild(wrapperNode, patternNode);
-                }
-                return !!match;
-            }
-            function traverse(el, hightlightTextNode) {
-                var childNode, TEXT_NODE_TYPE = 3;
-                for (var i = 0; i < el.childNodes.length; i++) {
-                    childNode = el.childNodes[i];
-                    if (childNode.nodeType === TEXT_NODE_TYPE) {
-                        i += hightlightTextNode(childNode) ? 1 : 0;
-                    } else {
-                        traverse(childNode, hightlightTextNode);
-                    }
-                }
-            }
-        };
-        function getRegex(patterns, caseSensitive, wordsOnly) {
-            var escapedPatterns = [], regexStr;
-            for (var i = 0, len = patterns.length; i < len; i++) {
-                escapedPatterns.push(_.escapeRegExChars(patterns[i]));
-            }
-            regexStr = wordsOnly ? "\\b(" + escapedPatterns.join("|") + ")\\b" : "(" + escapedPatterns.join("|") + ")";
-            return caseSensitive ? new RegExp(regexStr) : new RegExp(regexStr, "i");
-        }
-    }(window.document);
-    var Input = function() {
-        "use strict";
-        var specialKeyCodeMap;
-        specialKeyCodeMap = {
-            9: "tab",
-            27: "esc",
-            37: "left",
-            39: "right",
-            13: "enter",
-            38: "up",
-            40: "down"
-        };
-        function Input(o, www) {
-            o = o || {};
-            if (!o.input) {
-                $.error("input is missing");
-            }
-            www.mixin(this);
-            this.$hint = $(o.hint);
-            this.$input = $(o.input);
-            this.query = this.$input.val();
-            this.queryWhenFocused = this.hasFocus() ? this.query : null;
-            this.$overflowHelper = buildOverflowHelper(this.$input);
-            this._checkLanguageDirection();
-            if (this.$hint.length === 0) {
-                this.setHint = this.getHint = this.clearHint = this.clearHintIfInvalid = _.noop;
-            }
-        }
-        Input.normalizeQuery = function(str) {
-            return _.toStr(str).replace(/^\s*/g, "").replace(/\s{2,}/g, " ");
-        };
-        _.mixin(Input.prototype, EventEmitter, {
-            _onBlur: function onBlur() {
-                this.resetInputValue();
-                this.trigger("blurred");
-            },
-            _onFocus: function onFocus() {
-                this.queryWhenFocused = this.query;
-                this.trigger("focused");
-            },
-            _onKeydown: function onKeydown($e) {
-                var keyName = specialKeyCodeMap[$e.which || $e.keyCode];
-                this._managePreventDefault(keyName, $e);
-                if (keyName && this._shouldTrigger(keyName, $e)) {
-                    this.trigger(keyName + "Keyed", $e);
-                }
-            },
-            _onInput: function onInput() {
-                this._setQuery(this.getInputValue());
-                this.clearHintIfInvalid();
-                this._checkLanguageDirection();
-            },
-            _managePreventDefault: function managePreventDefault(keyName, $e) {
-                var preventDefault;
-                switch (keyName) {
-                  case "up":
-                  case "down":
-                    preventDefault = !withModifier($e);
-                    break;
-
-                  default:
-                    preventDefault = false;
-                }
-                preventDefault && $e.preventDefault();
-            },
-            _shouldTrigger: function shouldTrigger(keyName, $e) {
-                var trigger;
-                switch (keyName) {
-                  case "tab":
-                    trigger = !withModifier($e);
-                    break;
-
-                  default:
-                    trigger = true;
-                }
-                return trigger;
-            },
-            _checkLanguageDirection: function checkLanguageDirection() {
-                var dir = (this.$input.css("direction") || "ltr").toLowerCase();
-                if (this.dir !== dir) {
-                    this.dir = dir;
-                    this.$hint.attr("dir", dir);
-                    this.trigger("langDirChanged", dir);
-                }
-            },
-            _setQuery: function setQuery(val, silent) {
-                var areEquivalent, hasDifferentWhitespace;
-                areEquivalent = areQueriesEquivalent(val, this.query);
-                hasDifferentWhitespace = areEquivalent ? this.query.length !== val.length : false;
-                this.query = val;
-                if (!silent && !areEquivalent) {
-                    this.trigger("queryChanged", this.query);
-                } else if (!silent && hasDifferentWhitespace) {
-                    this.trigger("whitespaceChanged", this.query);
-                }
-            },
-            bind: function() {
-                var that = this, onBlur, onFocus, onKeydown, onInput;
-                onBlur = _.bind(this._onBlur, this);
-                onFocus = _.bind(this._onFocus, this);
-                onKeydown = _.bind(this._onKeydown, this);
-                onInput = _.bind(this._onInput, this);
-                this.$input.on("blur.tt", onBlur).on("focus.tt", onFocus).on("keydown.tt", onKeydown);
-                if (!_.isMsie() || _.isMsie() > 9) {
-                    this.$input.on("input.tt", onInput);
-                } else {
-                    this.$input.on("keydown.tt keypress.tt cut.tt paste.tt", function($e) {
-                        if (specialKeyCodeMap[$e.which || $e.keyCode]) {
-                            return;
-                        }
-                        _.defer(_.bind(that._onInput, that, $e));
-                    });
-                }
-                return this;
-            },
-            focus: function focus() {
-                this.$input.focus();
-            },
-            blur: function blur() {
-                this.$input.blur();
-            },
-            getLangDir: function getLangDir() {
-                return this.dir;
-            },
-            getQuery: function getQuery() {
-                return this.query || "";
-            },
-            setQuery: function setQuery(val, silent) {
-                this.setInputValue(val);
-                this._setQuery(val, silent);
-            },
-            hasQueryChangedSinceLastFocus: function hasQueryChangedSinceLastFocus() {
-                return this.query !== this.queryWhenFocused;
-            },
-            getInputValue: function getInputValue() {
-                return this.$input.val();
-            },
-            setInputValue: function setInputValue(value) {
-                this.$input.val(value);
-                this.clearHintIfInvalid();
-                this._checkLanguageDirection();
-            },
-            resetInputValue: function resetInputValue() {
-                this.setInputValue(this.query);
-            },
-            getHint: function getHint() {
-                return this.$hint.val();
-            },
-            setHint: function setHint(value) {
-                this.$hint.val(value);
-            },
-            clearHint: function clearHint() {
-                this.setHint("");
-            },
-            clearHintIfInvalid: function clearHintIfInvalid() {
-                var val, hint, valIsPrefixOfHint, isValid;
-                val = this.getInputValue();
-                hint = this.getHint();
-                valIsPrefixOfHint = val !== hint && hint.indexOf(val) === 0;
-                isValid = val !== "" && valIsPrefixOfHint && !this.hasOverflow();
-                !isValid && this.clearHint();
-            },
-            hasFocus: function hasFocus() {
-                return this.$input.is(":focus");
-            },
-            hasOverflow: function hasOverflow() {
-                var constraint = this.$input.width() - 2;
-                this.$overflowHelper.text(this.getInputValue());
-                return this.$overflowHelper.width() >= constraint;
-            },
-            isCursorAtEnd: function() {
-                var valueLength, selectionStart, range;
-                valueLength = this.$input.val().length;
-                selectionStart = this.$input[0].selectionStart;
-                if (_.isNumber(selectionStart)) {
-                    return selectionStart === valueLength;
-                } else if (document.selection) {
-                    range = document.selection.createRange();
-                    range.moveStart("character", -valueLength);
-                    return valueLength === range.text.length;
-                }
-                return true;
-            },
-            destroy: function destroy() {
-                this.$hint.off(".tt");
-                this.$input.off(".tt");
-                this.$overflowHelper.remove();
-                this.$hint = this.$input = this.$overflowHelper = $("<div>");
-            }
-        });
-        return Input;
-        function buildOverflowHelper($input) {
-            return $('<pre aria-hidden="true"></pre>').css({
-                position: "absolute",
-                visibility: "hidden",
-                whiteSpace: "pre",
-                fontFamily: $input.css("font-family"),
-                fontSize: $input.css("font-size"),
-                fontStyle: $input.css("font-style"),
-                fontVariant: $input.css("font-variant"),
-                fontWeight: $input.css("font-weight"),
-                wordSpacing: $input.css("word-spacing"),
-                letterSpacing: $input.css("letter-spacing"),
-                textIndent: $input.css("text-indent"),
-                textRendering: $input.css("text-rendering"),
-                textTransform: $input.css("text-transform")
-            }).insertAfter($input);
-        }
-        function areQueriesEquivalent(a, b) {
-            return Input.normalizeQuery(a) === Input.normalizeQuery(b);
-        }
-        function withModifier($e) {
-            return $e.altKey || $e.ctrlKey || $e.metaKey || $e.shiftKey;
-        }
-    }();
-    var Dataset = function() {
-        "use strict";
-        var keys, nameGenerator;
-        keys = {
-            val: "tt-selectable-display",
-            obj: "tt-selectable-object"
-        };
-        nameGenerator = _.getIdGenerator();
-        function Dataset(o, www) {
-            o = o || {};
-            o.templates = o.templates || {};
-            o.templates.notFound = o.templates.notFound || o.templates.empty;
-            if (!o.source) {
-                $.error("missing source");
-            }
-            if (!o.node) {
-                $.error("missing node");
-            }
-            if (o.name && !isValidName(o.name)) {
-                $.error("invalid dataset name: " + o.name);
-            }
-            www.mixin(this);
-            this.highlight = !!o.highlight;
-            this.name = o.name || nameGenerator();
-            this.limit = o.limit || 5;
-            this.displayFn = getDisplayFn(o.display || o.displayKey);
-            this.templates = getTemplates(o.templates, this.displayFn);
-            this.source = o.source.__ttAdapter ? o.source.__ttAdapter() : o.source;
-            this.async = _.isUndefined(o.async) ? this.source.length > 2 : !!o.async;
-            this._resetLastSuggestion();
-            this.$el = $(o.node).addClass(this.classes.dataset).addClass(this.classes.dataset + "-" + this.name);
-        }
-        Dataset.extractData = function extractData(el) {
-            var $el = $(el);
-            if ($el.data(keys.obj)) {
-                return {
-                    val: $el.data(keys.val) || "",
-                    obj: $el.data(keys.obj) || null
-                };
-            }
-            return null;
-        };
-        _.mixin(Dataset.prototype, EventEmitter, {
-            _overwrite: function overwrite(query, suggestions) {
-                suggestions = suggestions || [];
-                if (suggestions.length) {
-                    this._renderSuggestions(query, suggestions);
-                } else if (this.async && this.templates.pending) {
-                    this._renderPending(query);
-                } else if (!this.async && this.templates.notFound) {
-                    this._renderNotFound(query);
-                } else {
-                    this._empty();
-                }
-                this.trigger("rendered", this.name, suggestions, false);
-            },
-            _append: function append(query, suggestions) {
-                suggestions = suggestions || [];
-                if (suggestions.length && this.$lastSuggestion.length) {
-                    this._appendSuggestions(query, suggestions);
-                } else if (suggestions.length) {
-                    this._renderSuggestions(query, suggestions);
-                } else if (!this.$lastSuggestion.length && this.templates.notFound) {
-                    this._renderNotFound(query);
-                }
-                this.trigger("rendered", this.name, suggestions, true);
-            },
-            _renderSuggestions: function renderSuggestions(query, suggestions) {
-                var $fragment;
-                $fragment = this._getSuggestionsFragment(query, suggestions);
-                this.$lastSuggestion = $fragment.children().last();
-                this.$el.html($fragment).prepend(this._getHeader(query, suggestions)).append(this._getFooter(query, suggestions));
-            },
-            _appendSuggestions: function appendSuggestions(query, suggestions) {
-                var $fragment, $lastSuggestion;
-                $fragment = this._getSuggestionsFragment(query, suggestions);
-                $lastSuggestion = $fragment.children().last();
-                this.$lastSuggestion.after($fragment);
-                this.$lastSuggestion = $lastSuggestion;
-            },
-            _renderPending: function renderPending(query) {
-                var template = this.templates.pending;
-                this._resetLastSuggestion();
-                template && this.$el.html(template({
-                    query: query,
-                    dataset: this.name
-                }));
-            },
-            _renderNotFound: function renderNotFound(query) {
-                var template = this.templates.notFound;
-                this._resetLastSuggestion();
-                template && this.$el.html(template({
-                    query: query,
-                    dataset: this.name
-                }));
-            },
-            _empty: function empty() {
-                this.$el.empty();
-                this._resetLastSuggestion();
-            },
-            _getSuggestionsFragment: function getSuggestionsFragment(query, suggestions) {
-                var that = this, fragment;
-                fragment = document.createDocumentFragment();
-                _.each(suggestions, function getSuggestionNode(suggestion) {
-                    var $el, context;
-                    context = that._injectQuery(query, suggestion);
-                    $el = $(that.templates.suggestion(context)).data(keys.obj, suggestion).data(keys.val, that.displayFn(suggestion)).addClass(that.classes.suggestion + " " + that.classes.selectable);
-                    fragment.appendChild($el[0]);
-                });
-                this.highlight && highlight({
-                    className: this.classes.highlight,
-                    node: fragment,
-                    pattern: query
-                });
-                return $(fragment);
-            },
-            _getFooter: function getFooter(query, suggestions) {
-                return this.templates.footer ? this.templates.footer({
-                    query: query,
-                    suggestions: suggestions,
-                    dataset: this.name
-                }) : null;
-            },
-            _getHeader: function getHeader(query, suggestions) {
-                return this.templates.header ? this.templates.header({
-                    query: query,
-                    suggestions: suggestions,
-                    dataset: this.name
-                }) : null;
-            },
-            _resetLastSuggestion: function resetLastSuggestion() {
-                this.$lastSuggestion = $();
-            },
-            _injectQuery: function injectQuery(query, obj) {
-                return _.isObject(obj) ? _.mixin({
-                    _query: query
-                }, obj) : obj;
-            },
-            update: function update(query) {
-                var that = this, canceled = false, syncCalled = false, rendered = 0;
-                this.cancel();
-                this.cancel = function cancel() {
-                    canceled = true;
-                    that.cancel = $.noop;
-                    that.async && that.trigger("asyncCanceled", query);
-                };
-                this.source(query, sync, async);
-                !syncCalled && sync([]);
-                function sync(suggestions) {
-                    if (syncCalled) {
-                        return;
-                    }
-                    syncCalled = true;
-                    suggestions = (suggestions || []).slice(0, that.limit);
-                    rendered = suggestions.length;
-                    that._overwrite(query, suggestions);
-                    if (rendered < that.limit && that.async) {
-                        that.trigger("asyncRequested", query);
-                    }
-                }
-                function async(suggestions) {
-                    suggestions = suggestions || [];
-                    if (!canceled && rendered < that.limit) {
-                        that.cancel = $.noop;
-                        rendered += suggestions.length;
-                        that._append(query, suggestions.slice(0, that.limit - rendered));
-                        that.async && that.trigger("asyncReceived", query);
-                    }
-                }
-            },
-            cancel: $.noop,
-            clear: function clear() {
-                this._empty();
-                this.cancel();
-                this.trigger("cleared");
-            },
-            isEmpty: function isEmpty() {
-                return this.$el.is(":empty");
-            },
-            destroy: function destroy() {
-                this.$el = $("<div>");
-            }
-        });
-        return Dataset;
-        function getDisplayFn(display) {
-            display = display || _.stringify;
-            return _.isFunction(display) ? display : displayFn;
-            function displayFn(obj) {
-                return obj[display];
-            }
-        }
-        function getTemplates(templates, displayFn) {
-            return {
-                notFound: templates.notFound && _.templatify(templates.notFound),
-                pending: templates.pending && _.templatify(templates.pending),
-                header: templates.header && _.templatify(templates.header),
-                footer: templates.footer && _.templatify(templates.footer),
-                suggestion: templates.suggestion || suggestionTemplate
-            };
-            function suggestionTemplate(context) {
-                return $("<div>").text(displayFn(context));
-            }
-        }
-        function isValidName(str) {
-            return /^[_a-zA-Z0-9-]+$/.test(str);
-        }
-    }();
-    var Menu = function() {
-        "use strict";
-        function Menu(o, www) {
-            var that = this;
-            o = o || {};
-            if (!o.node) {
-                $.error("node is required");
-            }
-            www.mixin(this);
-            this.$node = $(o.node);
-            this.query = null;
-            this.datasets = _.map(o.datasets, initializeDataset);
-            function initializeDataset(oDataset) {
-                var node = that.$node.find(oDataset.node).first();
-                oDataset.node = node.length ? node : $("<div>").appendTo(that.$node);
-                return new Dataset(oDataset, www);
-            }
-        }
-        _.mixin(Menu.prototype, EventEmitter, {
-            _onSelectableClick: function onSelectableClick($e) {
-                this.trigger("selectableClicked", $($e.currentTarget));
-            },
-            _onRendered: function onRendered(type, dataset, suggestions, async) {
-                this.$node.toggleClass(this.classes.empty, this._allDatasetsEmpty());
-                this.trigger("datasetRendered", dataset, suggestions, async);
-            },
-            _onCleared: function onCleared() {
-                this.$node.toggleClass(this.classes.empty, this._allDatasetsEmpty());
-                this.trigger("datasetCleared");
-            },
-            _propagate: function propagate() {
-                this.trigger.apply(this, arguments);
-            },
-            _allDatasetsEmpty: function allDatasetsEmpty() {
-                return _.every(this.datasets, isDatasetEmpty);
-                function isDatasetEmpty(dataset) {
-                    return dataset.isEmpty();
-                }
-            },
-            _getSelectables: function getSelectables() {
-                return this.$node.find(this.selectors.selectable);
-            },
-            _removeCursor: function _removeCursor() {
-                var $selectable = this.getActiveSelectable();
-                $selectable && $selectable.removeClass(this.classes.cursor);
-            },
-            _ensureVisible: function ensureVisible($el) {
-                var elTop, elBottom, nodeScrollTop, nodeHeight;
-                elTop = $el.position().top;
-                elBottom = elTop + $el.outerHeight(true);
-                nodeScrollTop = this.$node.scrollTop();
-                nodeHeight = this.$node.height() + parseInt(this.$node.css("paddingTop"), 10) + parseInt(this.$node.css("paddingBottom"), 10);
-                if (elTop < 0) {
-                    this.$node.scrollTop(nodeScrollTop + elTop);
-                } else if (nodeHeight < elBottom) {
-                    this.$node.scrollTop(nodeScrollTop + (elBottom - nodeHeight));
-                }
-            },
-            bind: function() {
-                var that = this, onSelectableClick;
-                onSelectableClick = _.bind(this._onSelectableClick, this);
-                this.$node.on("click.tt", this.selectors.selectable, onSelectableClick);
-                _.each(this.datasets, function(dataset) {
-                    dataset.onSync("asyncRequested", that._propagate, that).onSync("asyncCanceled", that._propagate, that).onSync("asyncReceived", that._propagate, that).onSync("rendered", that._onRendered, that).onSync("cleared", that._onCleared, that);
-                });
-                return this;
-            },
-            isOpen: function isOpen() {
-                return this.$node.hasClass(this.classes.open);
-            },
-            open: function open() {
-                this.$node.addClass(this.classes.open);
-            },
-            close: function close() {
-                this.$node.removeClass(this.classes.open);
-                this._removeCursor();
-            },
-            setLanguageDirection: function setLanguageDirection(dir) {
-                this.$node.attr("dir", dir);
-            },
-            selectableRelativeToCursor: function selectableRelativeToCursor(delta) {
-                var $selectables, $oldCursor, oldIndex, newIndex;
-                $oldCursor = this.getActiveSelectable();
-                $selectables = this._getSelectables();
-                oldIndex = $oldCursor ? $selectables.index($oldCursor) : -1;
-                newIndex = oldIndex + delta;
-                newIndex = (newIndex + 1) % ($selectables.length + 1) - 1;
-                newIndex = newIndex < -1 ? $selectables.length - 1 : newIndex;
-                return newIndex === -1 ? null : $selectables.eq(newIndex);
-            },
-            setCursor: function setCursor($selectable) {
-                this._removeCursor();
-                if ($selectable = $selectable && $selectable.first()) {
-                    $selectable.addClass(this.classes.cursor);
-                    this._ensureVisible($selectable);
-                }
-            },
-            getSelectableData: function getSelectableData($el) {
-                return $el && $el.length ? Dataset.extractData($el) : null;
-            },
-            getActiveSelectable: function getActiveSelectable() {
-                var $selectable = this._getSelectables().filter(this.selectors.cursor).first();
-                return $selectable.length ? $selectable : null;
-            },
-            getTopSelectable: function getTopSelectable() {
-                var $selectable = this._getSelectables().first();
-                return $selectable.length ? $selectable : null;
-            },
-            update: function update(query) {
-                var isValidUpdate = query !== this.query;
-                if (isValidUpdate) {
-                    this.query = query;
-                    _.each(this.datasets, updateDataset);
-                }
-                return isValidUpdate;
-                function updateDataset(dataset) {
-                    dataset.update(query);
-                }
-            },
-            empty: function empty() {
-                _.each(this.datasets, clearDataset);
-                this.query = null;
-                this.$node.addClass(this.classes.empty);
-                function clearDataset(dataset) {
-                    dataset.clear();
-                }
-            },
-            destroy: function destroy() {
-                this.$node.off(".tt");
-                this.$node = $("<div>");
-                _.each(this.datasets, destroyDataset);
-                function destroyDataset(dataset) {
-                    dataset.destroy();
-                }
-            }
-        });
-        return Menu;
-    }();
-    var DefaultMenu = function() {
-        "use strict";
-        var s = Menu.prototype;
-        function DefaultMenu() {
-            Menu.apply(this, [].slice.call(arguments, 0));
-        }
-        _.mixin(DefaultMenu.prototype, Menu.prototype, {
-            open: function open() {
-                !this._allDatasetsEmpty() && this._show();
-                return s.open.apply(this, [].slice.call(arguments, 0));
-            },
-            close: function close() {
-                this._hide();
-                return s.close.apply(this, [].slice.call(arguments, 0));
-            },
-            _onRendered: function onRendered() {
-                if (this._allDatasetsEmpty()) {
-                    this._hide();
-                } else {
-                    this.isOpen() && this._show();
-                }
-                return s._onRendered.apply(this, [].slice.call(arguments, 0));
-            },
-            _onCleared: function onCleared() {
-                if (this._allDatasetsEmpty()) {
-                    this._hide();
-                } else {
-                    this.isOpen() && this._show();
-                }
-                return s._onCleared.apply(this, [].slice.call(arguments, 0));
-            },
-            setLanguageDirection: function setLanguageDirection(dir) {
-                this.$node.css(dir === "ltr" ? this.css.ltr : this.css.rtl);
-                return s.setLanguageDirection.apply(this, [].slice.call(arguments, 0));
-            },
-            _hide: function hide() {
-                this.$node.hide();
-            },
-            _show: function show() {
-                this.$node.css("display", "block");
-            }
-        });
-        return DefaultMenu;
-    }();
-    var Typeahead = function() {
-        "use strict";
-        function Typeahead(o, www) {
-            var onFocused, onBlurred, onEnterKeyed, onTabKeyed, onEscKeyed, onUpKeyed, onDownKeyed, onLeftKeyed, onRightKeyed, onQueryChanged, onWhitespaceChanged;
-            o = o || {};
-            if (!o.input) {
-                $.error("missing input");
-            }
-            if (!o.menu) {
-                $.error("missing menu");
-            }
-            if (!o.eventBus) {
-                $.error("missing event bus");
-            }
-            www.mixin(this);
-            this.eventBus = o.eventBus;
-            this.minLength = _.isNumber(o.minLength) ? o.minLength : 1;
-            this.input = o.input;
-            this.menu = o.menu;
-            this.enabled = true;
-            this.active = false;
-            this.input.hasFocus() && this.activate();
-            this.dir = this.input.getLangDir();
-            this._hacks();
-            this.menu.bind().onSync("selectableClicked", this._onSelectableClicked, this).onSync("asyncRequested", this._onAsyncRequested, this).onSync("asyncCanceled", this._onAsyncCanceled, this).onSync("asyncReceived", this._onAsyncReceived, this).onSync("datasetRendered", this._onDatasetRendered, this).onSync("datasetCleared", this._onDatasetCleared, this);
-            onFocused = c(this, "activate", "open", "_onFocused");
-            onBlurred = c(this, "deactivate", "_onBlurred");
-            onEnterKeyed = c(this, "isActive", "isOpen", "_onEnterKeyed");
-            onTabKeyed = c(this, "isActive", "isOpen", "_onTabKeyed");
-            onEscKeyed = c(this, "isActive", "_onEscKeyed");
-            onUpKeyed = c(this, "isActive", "open", "_onUpKeyed");
-            onDownKeyed = c(this, "isActive", "open", "_onDownKeyed");
-            onLeftKeyed = c(this, "isActive", "isOpen", "_onLeftKeyed");
-            onRightKeyed = c(this, "isActive", "isOpen", "_onRightKeyed");
-            onQueryChanged = c(this, "_openIfActive", "_onQueryChanged");
-            onWhitespaceChanged = c(this, "_openIfActive", "_onWhitespaceChanged");
-            this.input.bind().onSync("focused", onFocused, this).onSync("blurred", onBlurred, this).onSync("enterKeyed", onEnterKeyed, this).onSync("tabKeyed", onTabKeyed, this).onSync("escKeyed", onEscKeyed, this).onSync("upKeyed", onUpKeyed, this).onSync("downKeyed", onDownKeyed, this).onSync("leftKeyed", onLeftKeyed, this).onSync("rightKeyed", onRightKeyed, this).onSync("queryChanged", onQueryChanged, this).onSync("whitespaceChanged", onWhitespaceChanged, this).onSync("langDirChanged", this._onLangDirChanged, this);
-        }
-        _.mixin(Typeahead.prototype, {
-            _hacks: function hacks() {
-                var $input, $menu;
-                $input = this.input.$input || $("<div>");
-                $menu = this.menu.$node || $("<div>");
-                $input.on("blur.tt", function($e) {
-                    var active, isActive, hasActive;
-                    active = document.activeElement;
-                    isActive = $menu.is(active);
-                    hasActive = $menu.has(active).length > 0;
-                    if (_.isMsie() && (isActive || hasActive)) {
-                        $e.preventDefault();
-                        $e.stopImmediatePropagation();
-                        _.defer(function() {
-                            $input.focus();
-                        });
-                    }
-                });
-                $menu.on("mousedown.tt", function($e) {
-                    $e.preventDefault();
-                });
-            },
-            _onSelectableClicked: function onSelectableClicked(type, $el) {
-                this.select($el);
-            },
-            _onDatasetCleared: function onDatasetCleared() {
-                this._updateHint();
-            },
-            _onDatasetRendered: function onDatasetRendered(type, dataset, suggestions, async) {
-                this._updateHint();
-                this.eventBus.trigger("render", suggestions, async, dataset);
-            },
-            _onAsyncRequested: function onAsyncRequested(type, dataset, query) {
-                this.eventBus.trigger("asyncrequest", query, dataset);
-            },
-            _onAsyncCanceled: function onAsyncCanceled(type, dataset, query) {
-                this.eventBus.trigger("asynccancel", query, dataset);
-            },
-            _onAsyncReceived: function onAsyncReceived(type, dataset, query) {
-                this.eventBus.trigger("asyncreceive", query, dataset);
-            },
-            _onFocused: function onFocused() {
-                this._minLengthMet() && this.menu.update(this.input.getQuery());
-            },
-            _onBlurred: function onBlurred() {
-                if (this.input.hasQueryChangedSinceLastFocus()) {
-                    this.eventBus.trigger("change", this.input.getQuery());
-                }
-            },
-            _onEnterKeyed: function onEnterKeyed(type, $e) {
-                var $selectable;
-                if ($selectable = this.menu.getActiveSelectable()) {
-                    this.select($selectable) && $e.preventDefault();
-                }
-            },
-            _onTabKeyed: function onTabKeyed(type, $e) {
-                var $selectable;
-                if ($selectable = this.menu.getActiveSelectable()) {
-                    this.select($selectable) && $e.preventDefault();
-                } else if ($selectable = this.menu.getTopSelectable()) {
-                    this.autocomplete($selectable) && $e.preventDefault();
-                }
-            },
-            _onEscKeyed: function onEscKeyed() {
-                this.close();
-            },
-            _onUpKeyed: function onUpKeyed() {
-                this.moveCursor(-1);
-            },
-            _onDownKeyed: function onDownKeyed() {
-                this.moveCursor(+1);
-            },
-            _onLeftKeyed: function onLeftKeyed() {
-                if (this.dir === "rtl" && this.input.isCursorAtEnd()) {
-                    this.autocomplete(this.menu.getTopSelectable());
-                }
-            },
-            _onRightKeyed: function onRightKeyed() {
-                if (this.dir === "ltr" && this.input.isCursorAtEnd()) {
-                    this.autocomplete(this.menu.getTopSelectable());
-                }
-            },
-            _onQueryChanged: function onQueryChanged(e, query) {
-                this._minLengthMet(query) ? this.menu.update(query) : this.menu.empty();
-            },
-            _onWhitespaceChanged: function onWhitespaceChanged() {
-                this._updateHint();
-            },
-            _onLangDirChanged: function onLangDirChanged(e, dir) {
-                if (this.dir !== dir) {
-                    this.dir = dir;
-                    this.menu.setLanguageDirection(dir);
-                }
-            },
-            _openIfActive: function openIfActive() {
-                this.isActive() && this.open();
-            },
-            _minLengthMet: function minLengthMet(query) {
-                query = _.isString(query) ? query : this.input.getQuery() || "";
-                return query.length >= this.minLength;
-            },
-            _updateHint: function updateHint() {
-                var $selectable, data, val, query, escapedQuery, frontMatchRegEx, match;
-                $selectable = this.menu.getTopSelectable();
-                data = this.menu.getSelectableData($selectable);
-                val = this.input.getInputValue();
-                if (data && !_.isBlankString(val) && !this.input.hasOverflow()) {
-                    query = Input.normalizeQuery(val);
-                    escapedQuery = _.escapeRegExChars(query);
-                    frontMatchRegEx = new RegExp("^(?:" + escapedQuery + ")(.+$)", "i");
-                    match = frontMatchRegEx.exec(data.val);
-                    match && this.input.setHint(val + match[1]);
-                } else {
-                    this.input.clearHint();
-                }
-            },
-            isEnabled: function isEnabled() {
-                return this.enabled;
-            },
-            enable: function enable() {
-                this.enabled = true;
-            },
-            disable: function disable() {
-                this.enabled = false;
-            },
-            isActive: function isActive() {
-                return this.active;
-            },
-            activate: function activate() {
-                if (this.isActive()) {
-                    return true;
-                } else if (!this.isEnabled() || this.eventBus.before("active")) {
-                    return false;
-                } else {
-                    this.active = true;
-                    this.eventBus.trigger("active");
-                    return true;
-                }
-            },
-            deactivate: function deactivate() {
-                if (!this.isActive()) {
-                    return true;
-                } else if (this.eventBus.before("idle")) {
-                    return false;
-                } else {
-                    this.active = false;
-                    this.close();
-                    this.eventBus.trigger("idle");
-                    return true;
-                }
-            },
-            isOpen: function isOpen() {
-                return this.menu.isOpen();
-            },
-            open: function open() {
-                if (!this.isOpen() && !this.eventBus.before("open")) {
-                    this.menu.open();
-                    this._updateHint();
-                    this.eventBus.trigger("open");
-                }
-                return this.isOpen();
-            },
-            close: function close() {
-                if (this.isOpen() && !this.eventBus.before("close")) {
-                    this.menu.close();
-                    this.input.clearHint();
-                    this.input.resetInputValue();
-                    this.eventBus.trigger("close");
-                }
-                return !this.isOpen();
-            },
-            setVal: function setVal(val) {
-                this.input.setQuery(_.toStr(val));
-            },
-            getVal: function getVal() {
-                return this.input.getQuery();
-            },
-            select: function select($selectable) {
-                var data = this.menu.getSelectableData($selectable);
-                if (data && !this.eventBus.before("select", data.obj)) {
-                    this.input.setQuery(data.val, true);
-                    this.eventBus.trigger("select", data.obj);
-                    this.close();
-                    return true;
-                }
-                return false;
-            },
-            autocomplete: function autocomplete($selectable) {
-                var query, data, isValid;
-                query = this.input.getQuery();
-                data = this.menu.getSelectableData($selectable);
-                isValid = data && query !== data.val;
-                if (isValid && !this.eventBus.before("autocomplete", data.obj)) {
-                    this.input.setQuery(data.val);
-                    this.eventBus.trigger("autocomplete", data.obj);
-                    return true;
-                }
-                return false;
-            },
-            moveCursor: function moveCursor(delta) {
-                var query, $candidate, data, payload, cancelMove;
-                query = this.input.getQuery();
-                $candidate = this.menu.selectableRelativeToCursor(delta);
-                data = this.menu.getSelectableData($candidate);
-                payload = data ? data.obj : null;
-                cancelMove = this._minLengthMet() && this.menu.update(query);
-                if (!cancelMove && !this.eventBus.before("cursorchange", payload)) {
-                    this.menu.setCursor($candidate);
-                    if (data) {
-                        this.input.setInputValue(data.val);
-                    } else {
-                        this.input.resetInputValue();
-                        this._updateHint();
-                    }
-                    this.eventBus.trigger("cursorchange", payload);
-                    return true;
-                }
-                return false;
-            },
-            destroy: function destroy() {
-                this.input.destroy();
-                this.menu.destroy();
-            }
-        });
-        return Typeahead;
-        function c(ctx) {
-            var methods = [].slice.call(arguments, 1);
-            return function() {
-                var args = [].slice.call(arguments);
-                _.each(methods, function(method) {
-                    return ctx[method].apply(ctx, args);
-                });
-            };
-        }
-    }();
-    (function() {
-        "use strict";
-        var old, keys, methods;
-        old = $.fn.typeahead;
-        keys = {
-            www: "tt-www",
-            attrs: "tt-attrs",
-            typeahead: "tt-typeahead"
-        };
-        methods = {
-            initialize: function initialize(o, datasets) {
-                var www;
-                datasets = _.isArray(datasets) ? datasets : [].slice.call(arguments, 1);
-                o = o || {};
-                www = WWW(o.classNames);
-                return this.each(attach);
-                function attach() {
-                    var $input, $wrapper, $hint, $menu, defaultHint, defaultMenu, eventBus, input, menu, typeahead, MenuConstructor;
-                    _.each(datasets, function(d) {
-                        d.highlight = !!o.highlight;
-                    });
-                    $input = $(this);
-                    $wrapper = $(www.html.wrapper);
-                    $hint = $elOrNull(o.hint);
-                    $menu = $elOrNull(o.menu);
-                    defaultHint = o.hint !== false && !$hint;
-                    defaultMenu = o.menu !== false && !$menu;
-                    defaultHint && ($hint = buildHintFromInput($input, www));
-                    defaultMenu && ($menu = $(www.html.menu).css(www.css.menu));
-                    $hint && $hint.val("");
-                    $input = prepInput($input, www);
-                    if (defaultHint || defaultMenu) {
-                        $wrapper.css(www.css.wrapper);
-                        $input.css(defaultHint ? www.css.input : www.css.inputWithNoHint);
-                        $input.wrap($wrapper).parent().prepend(defaultHint ? $hint : null).append(defaultMenu ? $menu : null);
-                    }
-                    MenuConstructor = defaultMenu ? DefaultMenu : Menu;
-                    eventBus = new EventBus({
-                        el: $input
-                    });
-                    input = new Input({
-                        hint: $hint,
-                        input: $input
-                    }, www);
-                    menu = new MenuConstructor({
-                        node: $menu,
-                        datasets: datasets
-                    }, www);
-                    typeahead = new Typeahead({
-                        input: input,
-                        menu: menu,
-                        eventBus: eventBus,
-                        minLength: o.minLength
-                    }, www);
-                    $input.data(keys.www, www);
-                    $input.data(keys.typeahead, typeahead);
-                }
-            },
-            isEnabled: function isEnabled() {
-                var enabled;
-                ttEach(this.first(), function(t) {
-                    enabled = t.isEnabled();
-                });
-                return enabled;
-            },
-            enable: function enable() {
-                ttEach(this, function(t) {
-                    t.enable();
-                });
-                return this;
-            },
-            disable: function disable() {
-                ttEach(this, function(t) {
-                    t.disable();
-                });
-                return this;
-            },
-            isActive: function isActive() {
-                var active;
-                ttEach(this.first(), function(t) {
-                    active = t.isActive();
-                });
-                return active;
-            },
-            activate: function activate() {
-                ttEach(this, function(t) {
-                    t.activate();
-                });
-                return this;
-            },
-            deactivate: function deactivate() {
-                ttEach(this, function(t) {
-                    t.deactivate();
-                });
-                return this;
-            },
-            isOpen: function isOpen() {
-                var open;
-                ttEach(this.first(), function(t) {
-                    open = t.isOpen();
-                });
-                return open;
-            },
-            open: function open() {
-                ttEach(this, function(t) {
-                    t.open();
-                });
-                return this;
-            },
-            close: function close() {
-                ttEach(this, function(t) {
-                    t.close();
-                });
-                return this;
-            },
-            select: function select(el) {
-                var success = false, $el = $(el);
-                ttEach(this.first(), function(t) {
-                    success = t.select($el);
-                });
-                return success;
-            },
-            autocomplete: function autocomplete(el) {
-                var success = false, $el = $(el);
-                ttEach(this.first(), function(t) {
-                    success = t.autocomplete($el);
-                });
-                return success;
-            },
-            moveCursor: function moveCursoe(delta) {
-                var success = false;
-                ttEach(this.first(), function(t) {
-                    success = t.moveCursor(delta);
-                });
-                return success;
-            },
-            val: function val(newVal) {
-                var query;
-                if (!arguments.length) {
-                    ttEach(this.first(), function(t) {
-                        query = t.getVal();
-                    });
-                    return query;
-                } else {
-                    ttEach(this, function(t) {
-                        t.setVal(newVal);
-                    });
-                    return this;
-                }
-            },
-            destroy: function destroy() {
-                ttEach(this, function(typeahead, $input) {
-                    revert($input);
-                    typeahead.destroy();
-                });
-                return this;
-            }
-        };
-        $.fn.typeahead = function(method) {
-            if (methods[method]) {
-                return methods[method].apply(this, [].slice.call(arguments, 1));
-            } else {
-                return methods.initialize.apply(this, arguments);
-            }
-        };
-        $.fn.typeahead.noConflict = function noConflict() {
-            $.fn.typeahead = old;
-            return this;
-        };
-        function ttEach($els, fn) {
-            $els.each(function() {
-                var $input = $(this), typeahead;
-                (typeahead = $input.data(keys.typeahead)) && fn(typeahead, $input);
-            });
-        }
-        function buildHintFromInput($input, www) {
-            return $input.clone().addClass(www.classes.hint).removeData().css(www.css.hint).css(getBackgroundStyles($input)).prop("readonly", true).removeAttr("id name placeholder required").attr({
-                autocomplete: "off",
-                spellcheck: "false",
-                tabindex: -1
-            });
-        }
-        function prepInput($input, www) {
-            $input.data(keys.attrs, {
-                dir: $input.attr("dir"),
-                autocomplete: $input.attr("autocomplete"),
-                spellcheck: $input.attr("spellcheck"),
-                style: $input.attr("style")
-            });
-            $input.addClass(www.classes.input).attr({
-                autocomplete: "off",
-                spellcheck: false
-            });
-            try {
-                !$input.attr("dir") && $input.attr("dir", "auto");
-            } catch (e) {}
-            return $input;
-        }
-        function getBackgroundStyles($el) {
-            return {
-                backgroundAttachment: $el.css("background-attachment"),
-                backgroundClip: $el.css("background-clip"),
-                backgroundColor: $el.css("background-color"),
-                backgroundImage: $el.css("background-image"),
-                backgroundOrigin: $el.css("background-origin"),
-                backgroundPosition: $el.css("background-position"),
-                backgroundRepeat: $el.css("background-repeat"),
-                backgroundSize: $el.css("background-size")
-            };
-        }
-        function revert($input) {
-            var www, $wrapper;
-            www = $input.data(keys.www);
-            $wrapper = $input.parent().filter(www.selectors.wrapper);
-            _.each($input.data(keys.attrs), function(val, key) {
-                _.isUndefined(val) ? $input.removeAttr(key) : $input.attr(key, val);
-            });
-            $input.removeData(keys.typeahead).removeData(keys.www).removeData(keys.attr).removeClass(www.classes.input);
-            if ($wrapper.length) {
-                $input.detach().insertAfter($wrapper);
-                $wrapper.remove();
-            }
-        }
-        function $elOrNull(obj) {
-            var isValid, $el;
-            isValid = _.isJQuery(obj) || _.isElement(obj);
-            $el = isValid ? $(obj).first() : [];
-            return $el.length ? $el : null;
-        }
-    })();
-});
-define("typeahead", ["jquery"], (function (global) {
-    return function () {
-        var ret, fn;
-       fn = function ($) {
-	return require.s.contexts._.registry['typeahead.js'].factory($);
-      };
-        ret = fn.apply(global, arguments);
-        return ret;
-    };
-}(this)));
-
-/*  Part of SWISH
-
-    Author:        Jan Wielemaker
-    E-mail:        J.Wielemaker@cs.vu.nl
-    WWW:           http://www.swi-prolog.org
-    Copyright (C): 2014-2017, VU University Amsterdam
-			      CWI Amsterdam
-    All rights reserved.
-
-    Redistribution and use in source and binary forms, with or without
-    modification, are permitted provided that the following conditions
-    are met:
-
-    1. Redistributions of source code must retain the above copyright
-       notice, this list of conditions and the following disclaimer.
-
-    2. Redistributions in binary form must reproduce the above copyright
-       notice, this list of conditions and the following disclaimer in
-       the documentation and/or other materials provided with the
-       distribution.
-
-    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-    "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-    LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
-    FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
-    COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
-    INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
-    BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
-    LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
-    CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-    LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
-    ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
-    POSSIBILITY OF SUCH DAMAGE.
-*/
-
-/**
- * @fileOverview
- * Support the SWISH search box.  This we want to find:
- *
- *   - Predicates based on templates we also use for template completion
- *   - Source code (line)		[TBD]
- *   - Saved programs by
- *     - Name
- *     - Tag
- *     - Description			[TBD]
- *
- * @version 0.2.0
- * @author Jan Wielemaker, J.Wielemaker@vu.nl
- * @requires jquery
- */
-
-define('search',[ "jquery", "config", "utils", "bloodhound", "typeahead" ],
-       function($, config, utils, Bloodhound) {
-
-(function($) {
-  var pluginName = 'search';
-
-  /** @lends $.fn.search */
-  var methods = {
-    /**
-     * Turn Bootstrap search input into a typeahead widget
-     * @param {Object}  [options]
-     * @param {Boolean} [options.search=true] If false, merely use
-     * typeahead to fill a value.
-     */
-    _init: function(options) {
-      options = options||{};
-
-      return this.each(function() {
-	var elem = $(this);
-	var query;			/* current query */
-
-		 /*******************************
-		 *	 FILE COMPLETION	*
-		 *******************************/
-
-	var files = new Bloodhound({
-			name: "files",
-			remote: { url: config.http.locations.swish_typeahead +
-				       "?set=file&q=%QUERY",
-				  wildcard: '%QUERY'
-			},
-			datumTokenizer: fileTokenizer,
-			queryTokenizer: Bloodhound.tokenizers.whitespace
-	               });
-	files.initialize();
-
-	function fileTokenizer(f) {
-	  return (f.tags||[]).push(f.name);
-	}
-
-	function renderFile(f) {
-	  function filetype(file) {
-	    return file.split('.').pop();
-	  }
-	  function filebase(file) {
-	    return file.split('.').slice(0,-1).join(".");
-	  }
-
-	  var str = "<div class=\"tt-match file type-icon "
-	          + filetype(f.name)
-	          + "\">"
-		  + "<span class=\"tt-label\">"
-		  + utils.htmlEncode(filebase(f.name));
-	          + "</span>";
-
-	  if ( f.tags ) {
-	    str += "<span class=\"tt-tags\">";
-	    for(var i=0; i<f.tags.length; i++) {
-	      var tag = f.tags[i];
-	      str += "<span class=\"tt-tag\">"
-		   + utils.htmlEncode(tag)
-		   + "</span>";
-	    }
-	    str += "</span>";
-	  }
-
-	  if ( f.title )
-	    str += "<div class=\"tt-title file\">"
-		 + utils.htmlEncode(f.title)
-		 + "</div>";
-	  str += "</div>";
-
-	  return str;
-	}
-
-		 /*******************************
-		 *     SEARCH STORE SOURCES	*
-		 *******************************/
-
-	var storeContent = new Bloodhound({
-			     name: "store_content",
-			     limit: 20,
-			     cache: false,
-			     remote: {
-			       url: config.http.locations.swish_typeahead +
-				     "?set=store_content&q=%QUERY",
-			       replace:bloodHoundURL
-			     },
-			     datumTokenizer: sourceLineTokenizer,
-			     queryTokenizer: Bloodhound.tokenizers.whitespace
-	                   });
-	storeContent.initialize();
-
-	var currentFile  = null;
-	var currentAlias = null;
-	function renderStoreSourceLine(hit) {
-	  var str = "";
-
-	  if ( hit.file != currentFile || hit.alias != currentAlias ) {
-	    var ext = hit.file.split('.').pop();
-	    currentFile = hit.file;
-	    currentAlias = hit.alias;
-	    str = "<div class=\"tt-file-header type-icon "+ext+"\">"
-		+ "<span class=\"tt-path-file\">"
-		+ utils.htmlEncode(hit.file)
-		+ "</span>"
-		+ "</div>";
-	  }
-
-	  return str+renderSourceMatch(hit);
-	}
-
-		 /*******************************
-		 *     SEARCH REMOTE SOURCES	*
-		 *******************************/
-
-	var sources = new Bloodhound({
-			name: "source",
-			limit: 15,
-			cache: false,
-			query_cache_length: 1,
-			remote: {
-			  url: config.http.locations.swish_typeahead +
-				"?set=sources&q=%QUERY",
-			  replace: bloodHoundURL
-			},
-			datumTokenizer: sourceLineTokenizer,
-			queryTokenizer: Bloodhound.tokenizers.whitespace
-	               });
-	sources.initialize();
-
-	function sourceLineTokenizer(hit) {
-	  return Bloodhound.tokenizers.whitespace(hit.text);
-	}
-
-	function renderSourceLine(hit) {
-	  var str = "";
-
-	  if ( hit.file != currentFile || hit.alias != currentAlias ) {
-	    currentFile = hit.file;
-	    currentAlias = hit.alias;
-	    str = "<div class=\"tt-file-header type-icon "+hit.ext+"\">"
-	        + "<span class=\"tt-path-alias\">"
-	        + utils.htmlEncode(hit.alias)
-		+ "</span>(<span class=\"tt-path-file\">"
-		+ utils.htmlEncode(hit.file)
-		+ ")</span>"
-		+ "</div>";
-	  }
-
-	  if ( hit.text )
-	    str += renderSourceMatch(hit);
-	  return str;
-	}
-
-
-		 /*******************************
-		 *    PREDICATE COMPLETION	*
-		 *******************************/
-
-	function predicateMatcher(q, cb) {
-	  var templates = config.swish.templates;
-	  var matches = [];
-	  var ql = q.split(" ");
-	  var pl = [];
-
-	  for(var i=0; i<ql.length; i++)
-	    pl.push({prefix:ql[i], regex:new RegExp("_"+ql[i])});
-
-	  for(var i=0; i<templates.length; i++) {
-	    var templ = templates[i];
-
-	    if ( templ.arity !== undefined ) {
-	      for(var j=0, match=true; j<pl.length && match; j++) {
-		if ( !(templ.name.startsWith(pl[j].prefix) ||
-		       templ.name.match(pl[j].regex)) )
-		  match=false;
-	      }
-	      if ( match )
-	        matches.push(templ);
-	    }
-	  }
-
-	  cb(matches);
-	}
-
-
-	function renderPredicate(p) {
-	  var str = "<div class=\"tt-match predicate";
-
-	  if ( p.type ) str += " " + p.type;
-	  if ( p.mode ) str += "\" title=\""
-                             + p.mode;
-
-	  str += "\">"
-               + "<span class=\"tt-label\">"
-	       + utils.htmlEncode(p.name)
-	       + "/"
-	       + p.arity
-	       + "</span>";
-
-	  if ( p.iso ) {
-	    str += "<span class=\"tt-tags\">";
-	    if ( p.iso )
-	      str += "<span class=\"tt-tag\">ISO</span>";
-	    str += "</span>";
-	  }
-
-	  if ( p.summary )
-	    str += "<div class=\"tt-title file\">"
-		 + utils.htmlEncode(p.summary)
-		 + "</div>";
-	  str += "</div>";
-
-
-	  str += "</div>";
-
-	  return str;
-	}
-
-		 /*******************************
-		 *	   SEARCH SOURCE	*
-		 *******************************/
-
-	var sourceRE;
-
-	function sourceMatcher(q, cb) {
-	  query = q;
-	  if ( q.length < 2 ) return [];
-
-	  var matches = [];
-	  var re = new RegExp("\\b"+q, "g");
-	  sourceRE = re;
-
-	  $(".prolog-editor").each(function() {
-	    var editor = this;
-	    var m = $(editor).prologEditor('search', re, {max: 7});
-
-	    for(var i=0; i<m.length; i++) {
-	      m[i].editor = editor;
-	      m[i].regex  = sourceRE;
-	      matches.push(m[i]);
-	    }
-	  });
-
-	  cb(matches);
-	}
-
-
-	function renderSourceMatch(hit) {
-	  var text = hit.text;
-	  var i;
-
-	  if ( (i=text.search(sourceRE)) > 20 )
-	    text = "..."+text.slice(i-17);
-	  if ( text.length > 80 )
-	    text = text.substring(0,80);
-
-	  var str = "<div class=\"tt-match source\">"
-	          + "<span class=\"tt-line\">"
-		  + "<span class=\"tt-lineno\">"
-		  + hit.line
-		  + "</span>"
-		  + "<span class=\"tt-text\">"
-		  + utils.htmlEncode(text)
-	          + "</span>"
-	          + "</span>"
-		  + "</div>";
-
-	  return str;
-	}
-
-
-		 /*******************************
-		 *	       USERS		*
-		 *******************************/
-
-	var users = new Bloodhound({
-			     name: "users",
-			     limit: 20,
-			     cache: false,
-			     remote: {
-			       url: config.http.locations.swish_typeahead +
-				     "?set=user&q=%QUERY",
-			       replace:bloodHoundURL
-			     },
-			     datumTokenizer: sourceLineTokenizer,
-			     queryTokenizer: Bloodhound.tokenizers.whitespace
-	                   });
-	users.initialize();
-
-	function renderUser(hit) {
-	  function avatar(hit) {
-	    if ( hit.avatar ) {
-	      return '<img class="avatar" src="'+encodeURI(hit.avatar)+'">';
-	    } else {
-	      return "";
-	    }
-	  }
-
-	  var str = '<div class="tt-match user">'
-		  + avatar(hit)
-		  + '<span class="tt-label">'
-		  + utils.htmlEncode(hit.name)
-		  + '</span>'
-		  + '</div>';
-
-	  return str;
-	}
-
-
-		 /*******************************
-		 *	      COMBINE		*
-		 *******************************/
-
-	var typeaheadProperties = {
-	  source:			/* local source */
-	  { name: "source",
-	    display: 'text',
-	    source: sourceMatcher,
-	    templates: { suggestion: renderSourceMatch }
-	  },
-	  sources:			/* remote sources */
-	  { name: "sources",
-	    display: 'file',
-	    source: sources.ttAdapter(),
-	    templates: { suggestion: renderSourceLine },
-	    limit: 15
-	  },
-	  files:			/* files in gitty on name and tags */
-	  { name: "files",
-	    display: 'name',
-	    source: files.ttAdapter(),
-	    templates: { suggestion: renderFile }
-	  },
-	  store_content:		/* file content in gitty */
-	  { name: "store_content",
-	    display: 'file',
-	    source: storeContent.ttAdapter(),
-	    templates: { suggestion: renderStoreSourceLine }
-	  },
-	  predicates:			/* built-in and library predicates */
-	  { name: "predicates",
-	    display: function(p) {
-	      return p.name+"/"+p.arity;
-	    },
-	    source: predicateMatcher,
-	    templates: { suggestion: renderPredicate }
-	  },
-	  users:			/* Users (profiles) */
-	  { name: "users",
-	    display: "name",
-	    source: users.ttAdapter(),
-	    templates: { suggestion: renderUser }
-	  }
-	};
-
-	// Get the actual query string exchanged between
-	// typeahead and Bloodhound.
-	var of = typeaheadProperties.sources.source;
-	typeaheadProperties.sources.source = function(q, cb) {
-	  currentFile = null;
-	  currentAlias = null;
-	  sourceRE = new RegExp(RegExp.escape(q));
-	  return of(q, cb);
-	}
-
-	/**
-	 * Assemble the sources
-	 */
-
-	function ttSources(from) {
-	  var sources = [];
-	  var src = from.replace(/\s+/g, ' ').split(" ");
-
-	  for(var i=0; i<src.length; i++) {
-	    sources.push(typeaheadProperties[src[i]]);
-	  }
-
-	  return sources;
-	}
-
-		 /*******************************
-		 *	     TYPEAHEAD		*
-		 *******************************/
-
-	elem.typeahead({ minLength: 2,
-			 highlight: true
-		       },
-		       ttSources(elem.data("search-in")))
-	  .on('typeahead:selected typeahead:autocompleted',
-	      function(ev, datum) {
-
-		if ( options.search == false ) {
-		  elem.data("json-value", datum);
-		} else {
-		  if ( datum.type == "store" ) {
-		    if ( datum.query ) {
-		      datum.regex = new RegExp(RegExp.escape(datum.query), "g");
-		      datum.showAllMatches = true;
-		    }
-		    $(ev.target).closest(".swish").swish('playFile', datum);
-		  } else if ( datum.arity !== undefined ) {
-		    $(".swish-event-receiver").trigger("pldoc", datum);
-		  } else if ( datum.editor !== undefined &&
-			      datum.line !== undefined ) {
-		    $(datum.editor).prologEditor('gotoLine', datum.line,
-						 { regex: datum.regex,
-						   showAllMatches: true
-						 });
-		  } else if ( datum.alias !== undefined ) {
-		    var url = encodeURI("/"+datum.alias+
-					"/"+datum.file+
-					"."+datum.ext);
-		    var play = { url:url, line:datum.line };
-
-		    if ( datum.query ) {
-		      play.regex = new RegExp(RegExp.escape(datum.query), "g");
-		      play.showAllMatches = true;
-		    }
-
-		    $(ev.target).closest(".swish").swish('playURL', play);
-		  } else {
-		    elem.data("json-value", datum);
-		    console.log(elem.data("json-value"));
-		  }
-		}
-	      });
-
-	if ( options.search != false ) {
-	  elem.closest("form").submit(function(ev) {
-	    var data = elem.data("json-value");
-	    var str  = elem.val();
-
-	    if ( !(data && data.datum && data.datum.label == str) )
-	      data = str;
-
-	    elem.val("");
-	    elem.data("json-value", null);
-
-	    elem.search('search', data);
-
-	    return false;
-	  });
-	}
-      });
-    },
-
-    /**
-     * Search for the a given query.
-     *
-     * @param {String|Object} q specifies the search target. If it is a
-     * string, no autocompletion was performed.  If it is an object, it
-     * is the object returned by Bloodhound
-     */
-    search: function(q) {
-      alert("Full search not yet implemented\n"+
-	    "Please select from auto completion list");
-    }
-  }; // methods
-
-  function bloodHoundURL(url, query) {
-    var url = url.replace('%QUERY',
-			  encodeURIComponent(query));
-    var match = $("label.active > input[name=smatch]").val();
-    if ( match )
-      url += "&match="+match;
-
-    return url;
-  }
-
-  /**
-   * <Class description>
-   *
-   * @class search
-   * @tutorial jquery-doc
-   * @memberOf $.fn
-   * @param {String|Object} [method] Either a method name or the jQuery
-   * plugin initialization object.
-   * @param [...] Zero or more arguments passed to the jQuery `method`
-   */
-
-  $.fn.search = function(method) {
-    if ( methods[method] ) {
-      return methods[method]
-	.apply(this, Array.prototype.slice.call(arguments, 1));
-    } else if ( typeof method === 'object' || !method ) {
-      return methods._init.apply(this, arguments);
-    } else {
-      $.error('Method ' + method + ' does not exist on jQuery.' + pluginName);
-    }
-  };
-}(jQuery));
-
-RegExp.escape = function(string) {
-  return string.replace(/[-\/\\^$*+?.()|[\]{}]/g, '\\$&')
-};
-
-});
-
-// CodeMirror, copyright (c) by Marijn Haverbeke and others
-// Distributed under an MIT license: http://codemirror.net/LICENSE
-
-// This is CodeMirror (http://codemirror.net), a code editor
-// implemented in JavaScript on top of the browser's DOM.
-//
-// You can find some technical background for some of the code below
-// at http://marijnhaverbeke.nl/blog/#cm-internals .
-
-(function (global, factory) {
-	typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
-	typeof define === 'function' && define.amd ? define('cm/lib/codemirror',factory) :
-	(global.CodeMirror = factory());
-}(this, (function () { 'use strict';
-
-// Kludges for bugs and behavior differences that can't be feature
-// detected are enabled based on userAgent etc sniffing.
-var userAgent = navigator.userAgent;
-var platform = navigator.platform;
-
-var gecko = /gecko\/\d/i.test(userAgent);
-var ie_upto10 = /MSIE \d/.test(userAgent);
-var ie_11up = /Trident\/(?:[7-9]|\d{2,})\..*rv:(\d+)/.exec(userAgent);
-var edge = /Edge\/(\d+)/.exec(userAgent);
-var ie = ie_upto10 || ie_11up || edge;
-var ie_version = ie && (ie_upto10 ? document.documentMode || 6 : +(edge || ie_11up)[1]);
-var webkit = !edge && /WebKit\//.test(userAgent);
-var qtwebkit = webkit && /Qt\/\d+\.\d+/.test(userAgent);
-var chrome = !edge && /Chrome\//.test(userAgent);
-var presto = /Opera\//.test(userAgent);
-var safari = /Apple Computer/.test(navigator.vendor);
-var mac_geMountainLion = /Mac OS X 1\d\D([8-9]|\d\d)\D/.test(userAgent);
-var phantom = /PhantomJS/.test(userAgent);
-
-var ios = !edge && /AppleWebKit/.test(userAgent) && /Mobile\/\w+/.test(userAgent);
-var android = /Android/.test(userAgent);
-// This is woefully incomplete. Suggestions for alternative methods welcome.
-var mobile = ios || android || /webOS|BlackBerry|Opera Mini|Opera Mobi|IEMobile/i.test(userAgent);
-var mac = ios || /Mac/.test(platform);
-var chromeOS = /\bCrOS\b/.test(userAgent);
-var windows = /win/i.test(platform);
-
-var presto_version = presto && userAgent.match(/Version\/(\d*\.\d*)/);
-if (presto_version) { presto_version = Number(presto_version[1]); }
-if (presto_version && presto_version >= 15) { presto = false; webkit = true; }
-// Some browsers use the wrong event properties to signal cmd/ctrl on OS X
-var flipCtrlCmd = mac && (qtwebkit || presto && (presto_version == null || presto_version < 12.11));
-var captureRightClick = gecko || (ie && ie_version >= 9);
-
-function classTest(cls) { return new RegExp("(^|\\s)" + cls + "(?:$|\\s)\\s*") }
-
-var rmClass = function(node, cls) {
-  var current = node.className;
-  var match = classTest(cls).exec(current);
-  if (match) {
-    var after = current.slice(match.index + match[0].length);
-    node.className = current.slice(0, match.index) + (after ? match[1] + after : "");
-  }
-};
-
-function removeChildren(e) {
-  for (var count = e.childNodes.length; count > 0; --count)
-    { e.removeChild(e.firstChild); }
-  return e
-}
-
-function removeChildrenAndAdd(parent, e) {
-  return removeChildren(parent).appendChild(e)
-}
-
-function elt(tag, content, className, style) {
-  var e = document.createElement(tag);
-  if (className) { e.className = className; }
-  if (style) { e.style.cssText = style; }
-  if (typeof content == "string") { e.appendChild(document.createTextNode(content)); }
-  else if (content) { for (var i = 0; i < content.length; ++i) { e.appendChild(content[i]); } }
-  return e
-}
-// wrapper for elt, which removes the elt from the accessibility tree
-function eltP(tag, content, className, style) {
-  var e = elt(tag, content, className, style);
-  e.setAttribute("role", "presentation");
-  return e
-}
-
-var range;
-if (document.createRange) { range = function(node, start, end, endNode) {
-  var r = document.createRange();
-  r.setEnd(endNode || node, end);
-  r.setStart(node, start);
-  return r
-}; }
-else { range = function(node, start, end) {
-  var r = document.body.createTextRange();
-  try { r.moveToElementText(node.parentNode); }
-  catch(e) { return r }
-  r.collapse(true);
-  r.moveEnd("character", end);
-  r.moveStart("character", start);
-  return r
-}; }
-
-function contains(parent, child) {
-  if (child.nodeType == 3) // Android browser always returns false when child is a textnode
-    { child = child.parentNode; }
-  if (parent.contains)
-    { return parent.contains(child) }
-  do {
-    if (child.nodeType == 11) { child = child.host; }
-    if (child == parent) { return true }
-  } while (child = child.parentNode)
-}
-
-function activeElt() {
-  // IE and Edge may throw an "Unspecified Error" when accessing document.activeElement.
-  // IE < 10 will throw when accessed while the page is loading or in an iframe.
-  // IE > 9 and Edge will throw when accessed in an iframe if document.body is unavailable.
-  var activeElement;
-  try {
-    activeElement = document.activeElement;
-  } catch(e) {
-    activeElement = document.body || null;
-  }
-  while (activeElement && activeElement.shadowRoot && activeElement.shadowRoot.activeElement)
-    { activeElement = activeElement.shadowRoot.activeElement; }
-  return activeElement
-}
-
-function addClass(node, cls) {
-  var current = node.className;
-  if (!classTest(cls).test(current)) { node.className += (current ? " " : "") + cls; }
-}
-function joinClasses(a, b) {
-  var as = a.split(" ");
-  for (var i = 0; i < as.length; i++)
-    { if (as[i] && !classTest(as[i]).test(b)) { b += " " + as[i]; } }
-  return b
-}
-
-var selectInput = function(node) { node.select(); };
-if (ios) // Mobile Safari apparently has a bug where select() is broken.
-  { selectInput = function(node) { node.selectionStart = 0; node.selectionEnd = node.value.length; }; }
-else if (ie) // Suppress mysterious IE10 errors
-  { selectInput = function(node) { try { node.select(); } catch(_e) {} }; }
-
-function bind(f) {
-  var args = Array.prototype.slice.call(arguments, 1);
-  return function(){return f.apply(null, args)}
-}
-
-function copyObj(obj, target, overwrite) {
-  if (!target) { target = {}; }
-  for (var prop in obj)
-    { if (obj.hasOwnProperty(prop) && (overwrite !== false || !target.hasOwnProperty(prop)))
-      { target[prop] = obj[prop]; } }
-  return target
-}
-
-// Counts the column offset in a string, taking tabs into account.
-// Used mostly to find indentation.
-function countColumn(string, end, tabSize, startIndex, startValue) {
-  if (end == null) {
-    end = string.search(/[^\s\u00a0]/);
-    if (end == -1) { end = string.length; }
-  }
-  for (var i = startIndex || 0, n = startValue || 0;;) {
-    var nextTab = string.indexOf("\t", i);
-    if (nextTab < 0 || nextTab >= end)
-      { return n + (end - i) }
-    n += nextTab - i;
-    n += tabSize - (n % tabSize);
-    i = nextTab + 1;
-  }
-}
-
-var Delayed = function() {this.id = null;};
-Delayed.prototype.set = function (ms, f) {
-  clearTimeout(this.id);
-  this.id = setTimeout(f, ms);
-};
-
-function indexOf(array, elt) {
-  for (var i = 0; i < array.length; ++i)
-    { if (array[i] == elt) { return i } }
-  return -1
-}
-
-// Number of pixels added to scroller and sizer to hide scrollbar
-var scrollerGap = 30;
-
-// Returned or thrown by various protocols to signal 'I'm not
-// handling this'.
-var Pass = {toString: function(){return "CodeMirror.Pass"}};
-
-// Reused option objects for setSelection & friends
-var sel_dontScroll = {scroll: false};
-var sel_mouse = {origin: "*mouse"};
-var sel_move = {origin: "+move"};
-
-// The inverse of countColumn -- find the offset that corresponds to
-// a particular column.
-function findColumn(string, goal, tabSize) {
-  for (var pos = 0, col = 0;;) {
-    var nextTab = string.indexOf("\t", pos);
-    if (nextTab == -1) { nextTab = string.length; }
-    var skipped = nextTab - pos;
-    if (nextTab == string.length || col + skipped >= goal)
-      { return pos + Math.min(skipped, goal - col) }
-    col += nextTab - pos;
-    col += tabSize - (col % tabSize);
-    pos = nextTab + 1;
-    if (col >= goal) { return pos }
-  }
-}
-
-var spaceStrs = [""];
-function spaceStr(n) {
-  while (spaceStrs.length <= n)
-    { spaceStrs.push(lst(spaceStrs) + " "); }
-  return spaceStrs[n]
-}
-
-function lst(arr) { return arr[arr.length-1] }
-
-function map(array, f) {
-  var out = [];
-  for (var i = 0; i < array.length; i++) { out[i] = f(array[i], i); }
-  return out
-}
-
-function insertSorted(array, value, score) {
-  var pos = 0, priority = score(value);
-  while (pos < array.length && score(array[pos]) <= priority) { pos++; }
-  array.splice(pos, 0, value);
-}
-
-function nothing() {}
-
-function createObj(base, props) {
-  var inst;
-  if (Object.create) {
-    inst = Object.create(base);
-  } else {
-    nothing.prototype = base;
-    inst = new nothing();
-  }
-  if (props) { copyObj(props, inst); }
-  return inst
-}
-
-var nonASCIISingleCaseWordChar = /[\u00df\u0587\u0590-\u05f4\u0600-\u06ff\u3040-\u309f\u30a0-\u30ff\u3400-\u4db5\u4e00-\u9fcc\uac00-\ud7af]/;
-function isWordCharBasic(ch) {
-  return /\w/.test(ch) || ch > "\x80" &&
-    (ch.toUpperCase() != ch.toLowerCase() || nonASCIISingleCaseWordChar.test(ch))
-}
-function isWordChar(ch, helper) {
-  if (!helper) { return isWordCharBasic(ch) }
-  if (helper.source.indexOf("\\w") > -1 && isWordCharBasic(ch)) { return true }
-  return helper.test(ch)
-}
-
-function isEmpty(obj) {
-  for (var n in obj) { if (obj.hasOwnProperty(n) && obj[n]) { return false } }
-  return true
-}
-
-// Extending unicode characters. A series of a non-extending char +
-// any number of extending chars is treated as a single unit as far
-// as editing and measuring is concerned. This is not fully correct,
-// since some scripts/fonts/browsers also treat other configurations
-// of code points as a group.
-var extendingChars = /[\u0300-\u036f\u0483-\u0489\u0591-\u05bd\u05bf\u05c1\u05c2\u05c4\u05c5\u05c7\u0610-\u061a\u064b-\u065e\u0670\u06d6-\u06dc\u06de-\u06e4\u06e7\u06e8\u06ea-\u06ed\u0711\u0730-\u074a\u07a6-\u07b0\u07eb-\u07f3\u0816-\u0819\u081b-\u0823\u0825-\u0827\u0829-\u082d\u0900-\u0902\u093c\u0941-\u0948\u094d\u0951-\u0955\u0962\u0963\u0981\u09bc\u09be\u09c1-\u09c4\u09cd\u09d7\u09e2\u09e3\u0a01\u0a02\u0a3c\u0a41\u0a42\u0a47\u0a48\u0a4b-\u0a4d\u0a51\u0a70\u0a71\u0a75\u0a81\u0a82\u0abc\u0ac1-\u0ac5\u0ac7\u0ac8\u0acd\u0ae2\u0ae3\u0b01\u0b3c\u0b3e\u0b3f\u0b41-\u0b44\u0b4d\u0b56\u0b57\u0b62\u0b63\u0b82\u0bbe\u0bc0\u0bcd\u0bd7\u0c3e-\u0c40\u0c46-\u0c48\u0c4a-\u0c4d\u0c55\u0c56\u0c62\u0c63\u0cbc\u0cbf\u0cc2\u0cc6\u0ccc\u0ccd\u0cd5\u0cd6\u0ce2\u0ce3\u0d3e\u0d41-\u0d44\u0d4d\u0d57\u0d62\u0d63\u0dca\u0dcf\u0dd2-\u0dd4\u0dd6\u0ddf\u0e31\u0e34-\u0e3a\u0e47-\u0e4e\u0eb1\u0eb4-\u0eb9\u0ebb\u0ebc\u0ec8-\u0ecd\u0f18\u0f19\u0f35\u0f37\u0f39\u0f71-\u0f7e\u0f80-\u0f84\u0f86\u0f87\u0f90-\u0f97\u0f99-\u0fbc\u0fc6\u102d-\u1030\u1032-\u1037\u1039\u103a\u103d\u103e\u1058\u1059\u105e-\u1060\u1071-\u1074\u1082\u1085\u1086\u108d\u109d\u135f\u1712-\u1714\u1732-\u1734\u1752\u1753\u1772\u1773\u17b7-\u17bd\u17c6\u17c9-\u17d3\u17dd\u180b-\u180d\u18a9\u1920-\u1922\u1927\u1928\u1932\u1939-\u193b\u1a17\u1a18\u1a56\u1a58-\u1a5e\u1a60\u1a62\u1a65-\u1a6c\u1a73-\u1a7c\u1a7f\u1b00-\u1b03\u1b34\u1b36-\u1b3a\u1b3c\u1b42\u1b6b-\u1b73\u1b80\u1b81\u1ba2-\u1ba5\u1ba8\u1ba9\u1c2c-\u1c33\u1c36\u1c37\u1cd0-\u1cd2\u1cd4-\u1ce0\u1ce2-\u1ce8\u1ced\u1dc0-\u1de6\u1dfd-\u1dff\u200c\u200d\u20d0-\u20f0\u2cef-\u2cf1\u2de0-\u2dff\u302a-\u302f\u3099\u309a\ua66f-\ua672\ua67c\ua67d\ua6f0\ua6f1\ua802\ua806\ua80b\ua825\ua826\ua8c4\ua8e0-\ua8f1\ua926-\ua92d\ua947-\ua951\ua980-\ua982\ua9b3\ua9b6-\ua9b9\ua9bc\uaa29-\uaa2e\uaa31\uaa32\uaa35\uaa36\uaa43\uaa4c\uaab0\uaab2-\uaab4\uaab7\uaab8\uaabe\uaabf\uaac1\uabe5\uabe8\uabed\udc00-\udfff\ufb1e\ufe00-\ufe0f\ufe20-\ufe26\uff9e\uff9f]/;
-function isExtendingChar(ch) { return ch.charCodeAt(0) >= 768 && extendingChars.test(ch) }
-
-// Returns a number from the range [`0`; `str.length`] unless `pos` is outside that range.
-function skipExtendingChars(str, pos, dir) {
-  while ((dir < 0 ? pos > 0 : pos < str.length) && isExtendingChar(str.charAt(pos))) { pos += dir; }
-  return pos
-}
-
-// Returns the value from the range [`from`; `to`] that satisfies
-// `pred` and is closest to `from`. Assumes that at least `to`
-// satisfies `pred`. Supports `from` being greater than `to`.
-function findFirst(pred, from, to) {
-  // At any point we are certain `to` satisfies `pred`, don't know
-  // whether `from` does.
-  var dir = from > to ? -1 : 1;
-  for (;;) {
-    if (from == to) { return from }
-    var midF = (from + to) / 2, mid = dir < 0 ? Math.ceil(midF) : Math.floor(midF);
-    if (mid == from) { return pred(mid) ? from : to }
-    if (pred(mid)) { to = mid; }
-    else { from = mid + dir; }
-  }
-}
-
-// The display handles the DOM integration, both for input reading
-// and content drawing. It holds references to DOM nodes and
-// display-related state.
-
-function Display(place, doc, input) {
-  var d = this;
-  this.input = input;
-
-  // Covers bottom-right square when both scrollbars are present.
-  d.scrollbarFiller = elt("div", null, "CodeMirror-scrollbar-filler");
-  d.scrollbarFiller.setAttribute("cm-not-content", "true");
-  // Covers bottom of gutter when coverGutterNextToScrollbar is on
-  // and h scrollbar is present.
-  d.gutterFiller = elt("div", null, "CodeMirror-gutter-filler");
-  d.gutterFiller.setAttribute("cm-not-content", "true");
-  // Will contain the actual code, positioned to cover the viewport.
-  d.lineDiv = eltP("div", null, "CodeMirror-code");
-  // Elements are added to these to represent selection and cursors.
-  d.selectionDiv = elt("div", null, null, "position: relative; z-index: 1");
-  d.cursorDiv = elt("div", null, "CodeMirror-cursors");
-  // A visibility: hidden element used to find the size of things.
-  d.measure = elt("div", null, "CodeMirror-measure");
-  // When lines outside of the viewport are measured, they are drawn in this.
-  d.lineMeasure = elt("div", null, "CodeMirror-measure");
-  // Wraps everything that needs to exist inside the vertically-padded coordinate system
-  d.lineSpace = eltP("div", [d.measure, d.lineMeasure, d.selectionDiv, d.cursorDiv, d.lineDiv],
-                    null, "position: relative; outline: none");
-  var lines = eltP("div", [d.lineSpace], "CodeMirror-lines");
-  // Moved around its parent to cover visible view.
-  d.mover = elt("div", [lines], null, "position: relative");
-  // Set to the height of the document, allowing scrolling.
-  d.sizer = elt("div", [d.mover], "CodeMirror-sizer");
-  d.sizerWidth = null;
-  // Behavior of elts with overflow: auto and padding is
-  // inconsistent across browsers. This is used to ensure the
-  // scrollable area is big enough.
-  d.heightForcer = elt("div", null, null, "position: absolute; height: " + scrollerGap + "px; width: 1px;");
-  // Will contain the gutters, if any.
-  d.gutters = elt("div", null, "CodeMirror-gutters");
-  d.lineGutter = null;
-  // Actual scrollable element.
-  d.scroller = elt("div", [d.sizer, d.heightForcer, d.gutters], "CodeMirror-scroll");
-  d.scroller.setAttribute("tabIndex", "-1");
-  // The element in which the editor lives.
-  d.wrapper = elt("div", [d.scrollbarFiller, d.gutterFiller, d.scroller], "CodeMirror");
-
-  // Work around IE7 z-index bug (not perfect, hence IE7 not really being supported)
-  if (ie && ie_version < 8) { d.gutters.style.zIndex = -1; d.scroller.style.paddingRight = 0; }
-  if (!webkit && !(gecko && mobile)) { d.scroller.draggable = true; }
-
-  if (place) {
-    if (place.appendChild) { place.appendChild(d.wrapper); }
-    else { place(d.wrapper); }
-  }
-
-  // Current rendered range (may be bigger than the view window).
-  d.viewFrom = d.viewTo = doc.first;
-  d.reportedViewFrom = d.reportedViewTo = doc.first;
-  // Information about the rendered lines.
-  d.view = [];
-  d.renderedView = null;
-  // Holds info about a single rendered line when it was rendered
-  // for measurement, while not in view.
-  d.externalMeasured = null;
-  // Empty space (in pixels) above the view
-  d.viewOffset = 0;
-  d.lastWrapHeight = d.lastWrapWidth = 0;
-  d.updateLineNumbers = null;
-
-  d.nativeBarWidth = d.barHeight = d.barWidth = 0;
-  d.scrollbarsClipped = false;
-
-  // Used to only resize the line number gutter when necessary (when
-  // the amount of lines crosses a boundary that makes its width change)
-  d.lineNumWidth = d.lineNumInnerWidth = d.lineNumChars = null;
-  // Set to true when a non-horizontal-scrolling line widget is
-  // added. As an optimization, line widget aligning is skipped when
-  // this is false.
-  d.alignWidgets = false;
-
-  d.cachedCharWidth = d.cachedTextHeight = d.cachedPaddingH = null;
-
-  // Tracks the maximum line length so that the horizontal scrollbar
-  // can be kept static when scrolling.
-  d.maxLine = null;
-  d.maxLineLength = 0;
-  d.maxLineChanged = false;
-
-  // Used for measuring wheel scrolling granularity
-  d.wheelDX = d.wheelDY = d.wheelStartX = d.wheelStartY = null;
-
-  // True when shift is held down.
-  d.shift = false;
-
-  // Used to track whether anything happened since the context menu
-  // was opened.
-  d.selForContextMenu = null;
-
-  d.activeTouch = null;
-
-  input.init(d);
-}
-
-// Find the line object corresponding to the given line number.
-function getLine(doc, n) {
-  n -= doc.first;
-  if (n < 0 || n >= doc.size) { throw new Error("There is no line " + (n + doc.first) + " in the document.") }
-  var chunk = doc;
-  while (!chunk.lines) {
-    for (var i = 0;; ++i) {
-      var child = chunk.children[i], sz = child.chunkSize();
-      if (n < sz) { chunk = child; break }
-      n -= sz;
-    }
-  }
-  return chunk.lines[n]
-}
-
-// Get the part of a document between two positions, as an array of
-// strings.
-function getBetween(doc, start, end) {
-  var out = [], n = start.line;
-  doc.iter(start.line, end.line + 1, function (line) {
-    var text = line.text;
-    if (n == end.line) { text = text.slice(0, end.ch); }
-    if (n == start.line) { text = text.slice(start.ch); }
-    out.push(text);
-    ++n;
-  });
-  return out
-}
-// Get the lines between from and to, as array of strings.
-function getLines(doc, from, to) {
-  var out = [];
-  doc.iter(from, to, function (line) { out.push(line.text); }); // iter aborts when callback returns truthy value
-  return out
-}
-
-// Update the height of a line, propagating the height change
-// upwards to parent nodes.
-function updateLineHeight(line, height) {
-  var diff = height - line.height;
-  if (diff) { for (var n = line; n; n = n.parent) { n.height += diff; } }
-}
-
-// Given a line object, find its line number by walking up through
-// its parent links.
-function lineNo(line) {
-  if (line.parent == null) { return null }
-  var cur = line.parent, no = indexOf(cur.lines, line);
-  for (var chunk = cur.parent; chunk; cur = chunk, chunk = chunk.parent) {
-    for (var i = 0;; ++i) {
-      if (chunk.children[i] == cur) { break }
-      no += chunk.children[i].chunkSize();
-    }
-  }
-  return no + cur.first
-}
-
-// Find the line at the given vertical position, using the height
-// information in the document tree.
-function lineAtHeight(chunk, h) {
-  var n = chunk.first;
-  outer: do {
-    for (var i$1 = 0; i$1 < chunk.children.length; ++i$1) {
-      var child = chunk.children[i$1], ch = child.height;
-      if (h < ch) { chunk = child; continue outer }
-      h -= ch;
-      n += child.chunkSize();
-    }
-    return n
-  } while (!chunk.lines)
-  var i = 0;
-  for (; i < chunk.lines.length; ++i) {
-    var line = chunk.lines[i], lh = line.height;
-    if (h < lh) { break }
-    h -= lh;
-  }
-  return n + i
-}
-
-function isLine(doc, l) {return l >= doc.first && l < doc.first + doc.size}
-
-function lineNumberFor(options, i) {
-  return String(options.lineNumberFormatter(i + options.firstLineNumber))
-}
-
-// A Pos instance represents a position within the text.
-function Pos(line, ch, sticky) {
-  if ( sticky === void 0 ) sticky = null;
-
-  if (!(this instanceof Pos)) { return new Pos(line, ch, sticky) }
-  this.line = line;
-  this.ch = ch;
-  this.sticky = sticky;
-}
-
-// Compare two positions, return 0 if they are the same, a negative
-// number when a is less, and a positive number otherwise.
-function cmp(a, b) { return a.line - b.line || a.ch - b.ch }
-
-function equalCursorPos(a, b) { return a.sticky == b.sticky && cmp(a, b) == 0 }
-
-function copyPos(x) {return Pos(x.line, x.ch)}
-function maxPos(a, b) { return cmp(a, b) < 0 ? b : a }
-function minPos(a, b) { return cmp(a, b) < 0 ? a : b }
-
-// Most of the external API clips given positions to make sure they
-// actually exist within the document.
-function clipLine(doc, n) {return Math.max(doc.first, Math.min(n, doc.first + doc.size - 1))}
-function clipPos(doc, pos) {
-  if (pos.line < doc.first) { return Pos(doc.first, 0) }
-  var last = doc.first + doc.size - 1;
-  if (pos.line > last) { return Pos(last, getLine(doc, last).text.length) }
-  return clipToLen(pos, getLine(doc, pos.line).text.length)
-}
-function clipToLen(pos, linelen) {
-  var ch = pos.ch;
-  if (ch == null || ch > linelen) { return Pos(pos.line, linelen) }
-  else if (ch < 0) { return Pos(pos.line, 0) }
-  else { return pos }
-}
-function clipPosArray(doc, array) {
-  var out = [];
-  for (var i = 0; i < array.length; i++) { out[i] = clipPos(doc, array[i]); }
-  return out
-}
-
-// Optimize some code when these features are not used.
-var sawReadOnlySpans = false;
-var sawCollapsedSpans = false;
-
-function seeReadOnlySpans() {
-  sawReadOnlySpans = true;
-}
-
-function seeCollapsedSpans() {
-  sawCollapsedSpans = true;
-}
-
-// TEXTMARKER SPANS
-
-function MarkedSpan(marker, from, to) {
-  this.marker = marker;
-  this.from = from; this.to = to;
-}
-
-// Search an array of spans for a span matching the given marker.
-function getMarkedSpanFor(spans, marker) {
-  if (spans) { for (var i = 0; i < spans.length; ++i) {
-    var span = spans[i];
-    if (span.marker == marker) { return span }
-  } }
-}
-// Remove a span from an array, returning undefined if no spans are
-// left (we don't store arrays for lines without spans).
-function removeMarkedSpan(spans, span) {
-  var r;
-  for (var i = 0; i < spans.length; ++i)
-    { if (spans[i] != span) { (r || (r = [])).push(spans[i]); } }
-  return r
-}
-// Add a span to a line.
-function addMarkedSpan(line, span) {
-  line.markedSpans = line.markedSpans ? line.markedSpans.concat([span]) : [span];
-  span.marker.attachLine(line);
-}
-
-// Used for the algorithm that adjusts markers for a change in the
-// document. These functions cut an array of spans at a given
-// character position, returning an array of remaining chunks (or
-// undefined if nothing remains).
-function markedSpansBefore(old, startCh, isInsert) {
-  var nw;
-  if (old) { for (var i = 0; i < old.length; ++i) {
-    var span = old[i], marker = span.marker;
-    var startsBefore = span.from == null || (marker.inclusiveLeft ? span.from <= startCh : span.from < startCh);
-    if (startsBefore || span.from == startCh && marker.type == "bookmark" && (!isInsert || !span.marker.insertLeft)) {
-      var endsAfter = span.to == null || (marker.inclusiveRight ? span.to >= startCh : span.to > startCh);(nw || (nw = [])).push(new MarkedSpan(marker, span.from, endsAfter ? null : span.to));
-    }
-  } }
-  return nw
-}
-function markedSpansAfter(old, endCh, isInsert) {
-  var nw;
-  if (old) { for (var i = 0; i < old.length; ++i) {
-    var span = old[i], marker = span.marker;
-    var endsAfter = span.to == null || (marker.inclusiveRight ? span.to >= endCh : span.to > endCh);
-    if (endsAfter || span.from == endCh && marker.type == "bookmark" && (!isInsert || span.marker.insertLeft)) {
-      var startsBefore = span.from == null || (marker.inclusiveLeft ? span.from <= endCh : span.from < endCh);(nw || (nw = [])).push(new MarkedSpan(marker, startsBefore ? null : span.from - endCh,
-                                            span.to == null ? null : span.to - endCh));
-    }
-  } }
-  return nw
-}
-
-// Given a change object, compute the new set of marker spans that
-// cover the line in which the change took place. Removes spans
-// entirely within the change, reconnects spans belonging to the
-// same marker that appear on both sides of the change, and cuts off
-// spans partially within the change. Returns an array of span
-// arrays with one element for each line in (after) the change.
-function stretchSpansOverChange(doc, change) {
-  if (change.full) { return null }
-  var oldFirst = isLine(doc, change.from.line) && getLine(doc, change.from.line).markedSpans;
-  var oldLast = isLine(doc, change.to.line) && getLine(doc, change.to.line).markedSpans;
-  if (!oldFirst && !oldLast) { return null }
-
-  var startCh = change.from.ch, endCh = change.to.ch, isInsert = cmp(change.from, change.to) == 0;
-  // Get the spans that 'stick out' on both sides
-  var first = markedSpansBefore(oldFirst, startCh, isInsert);
-  var last = markedSpansAfter(oldLast, endCh, isInsert);
-
-  // Next, merge those two ends
-  var sameLine = change.text.length == 1, offset = lst(change.text).length + (sameLine ? startCh : 0);
-  if (first) {
-    // Fix up .to properties of first
-    for (var i = 0; i < first.length; ++i) {
-      var span = first[i];
-      if (span.to == null) {
-        var found = getMarkedSpanFor(last, span.marker);
-        if (!found) { span.to = startCh; }
-        else if (sameLine) { span.to = found.to == null ? null : found.to + offset; }
-      }
-    }
-  }
-  if (last) {
-    // Fix up .from in last (or move them into first in case of sameLine)
-    for (var i$1 = 0; i$1 < last.length; ++i$1) {
-      var span$1 = last[i$1];
-      if (span$1.to != null) { span$1.to += offset; }
-      if (span$1.from == null) {
-        var found$1 = getMarkedSpanFor(first, span$1.marker);
-        if (!found$1) {
-          span$1.from = offset;
-          if (sameLine) { (first || (first = [])).push(span$1); }
-        }
-      } else {
-        span$1.from += offset;
-        if (sameLine) { (first || (first = [])).push(span$1); }
-      }
-    }
-  }
-  // Make sure we didn't create any zero-length spans
-  if (first) { first = clearEmptySpans(first); }
-  if (last && last != first) { last = clearEmptySpans(last); }
-
-  var newMarkers = [first];
-  if (!sameLine) {
-    // Fill gap with whole-line-spans
-    var gap = change.text.length - 2, gapMarkers;
-    if (gap > 0 && first)
-      { for (var i$2 = 0; i$2 < first.length; ++i$2)
-        { if (first[i$2].to == null)
-          { (gapMarkers || (gapMarkers = [])).push(new MarkedSpan(first[i$2].marker, null, null)); } } }
-    for (var i$3 = 0; i$3 < gap; ++i$3)
-      { newMarkers.push(gapMarkers); }
-    newMarkers.push(last);
-  }
-  return newMarkers
-}
-
-// Remove spans that are empty and don't have a clearWhenEmpty
-// option of false.
-function clearEmptySpans(spans) {
-  for (var i = 0; i < spans.length; ++i) {
-    var span = spans[i];
-    if (span.from != null && span.from == span.to && span.marker.clearWhenEmpty !== false)
-      { spans.splice(i--, 1); }
-  }
-  if (!spans.length) { return null }
-  return spans
-}
-
-// Used to 'clip' out readOnly ranges when making a change.
-function removeReadOnlyRanges(doc, from, to) {
-  var markers = null;
-  doc.iter(from.line, to.line + 1, function (line) {
-    if (line.markedSpans) { for (var i = 0; i < line.markedSpans.length; ++i) {
-      var mark = line.markedSpans[i].marker;
-      if (mark.readOnly && (!markers || indexOf(markers, mark) == -1))
-        { (markers || (markers = [])).push(mark); }
-    } }
-  });
-  if (!markers) { return null }
-  var parts = [{from: from, to: to}];
-  for (var i = 0; i < markers.length; ++i) {
-    var mk = markers[i], m = mk.find(0);
-    for (var j = 0; j < parts.length; ++j) {
-      var p = parts[j];
-      if (cmp(p.to, m.from) < 0 || cmp(p.from, m.to) > 0) { continue }
-      var newParts = [j, 1], dfrom = cmp(p.from, m.from), dto = cmp(p.to, m.to);
-      if (dfrom < 0 || !mk.inclusiveLeft && !dfrom)
-        { newParts.push({from: p.from, to: m.from}); }
-      if (dto > 0 || !mk.inclusiveRight && !dto)
-        { newParts.push({from: m.to, to: p.to}); }
-      parts.splice.apply(parts, newParts);
-      j += newParts.length - 3;
-    }
-  }
-  return parts
-}
-
-// Connect or disconnect spans from a line.
-function detachMarkedSpans(line) {
-  var spans = line.markedSpans;
-  if (!spans) { return }
-  for (var i = 0; i < spans.length; ++i)
-    { spans[i].marker.detachLine(line); }
-  line.markedSpans = null;
-}
-function attachMarkedSpans(line, spans) {
-  if (!spans) { return }
-  for (var i = 0; i < spans.length; ++i)
-    { spans[i].marker.attachLine(line); }
-  line.markedSpans = spans;
-}
-
-// Helpers used when computing which overlapping collapsed span
-// counts as the larger one.
-function extraLeft(marker) { return marker.inclusiveLeft ? -1 : 0 }
-function extraRight(marker) { return marker.inclusiveRight ? 1 : 0 }
-
-// Returns a number indicating which of two overlapping collapsed
-// spans is larger (and thus includes the other). Falls back to
-// comparing ids when the spans cover exactly the same range.
-function compareCollapsedMarkers(a, b) {
-  var lenDiff = a.lines.length - b.lines.length;
-  if (lenDiff != 0) { return lenDiff }
-  var aPos = a.find(), bPos = b.find();
-  var fromCmp = cmp(aPos.from, bPos.from) || extraLeft(a) - extraLeft(b);
-  if (fromCmp) { return -fromCmp }
-  var toCmp = cmp(aPos.to, bPos.to) || extraRight(a) - extraRight(b);
-  if (toCmp) { return toCmp }
-  return b.id - a.id
-}
-
-// Find out whether a line ends or starts in a collapsed span. If
-// so, return the marker for that span.
-function collapsedSpanAtSide(line, start) {
-  var sps = sawCollapsedSpans && line.markedSpans, found;
-  if (sps) { for (var sp = (void 0), i = 0; i < sps.length; ++i) {
-    sp = sps[i];
-    if (sp.marker.collapsed && (start ? sp.from : sp.to) == null &&
-        (!found || compareCollapsedMarkers(found, sp.marker) < 0))
-      { found = sp.marker; }
-  } }
-  return found
-}
-function collapsedSpanAtStart(line) { return collapsedSpanAtSide(line, true) }
-function collapsedSpanAtEnd(line) { return collapsedSpanAtSide(line, false) }
-
-function collapsedSpanAround(line, ch) {
-  var sps = sawCollapsedSpans && line.markedSpans, found;
-  if (sps) { for (var i = 0; i < sps.length; ++i) {
-    var sp = sps[i];
-    if (sp.marker.collapsed && (sp.from == null || sp.from < ch) && (sp.to == null || sp.to > ch) &&
-        (!found || compareCollapsedMarkers(found, sp.marker) < 0)) { found = sp.marker; }
-  } }
-  return found
-}
-
-// Test whether there exists a collapsed span that partially
-// overlaps (covers the start or end, but not both) of a new span.
-// Such overlap is not allowed.
-function conflictingCollapsedRange(doc, lineNo$$1, from, to, marker) {
-  var line = getLine(doc, lineNo$$1);
-  var sps = sawCollapsedSpans && line.markedSpans;
-  if (sps) { for (var i = 0; i < sps.length; ++i) {
-    var sp = sps[i];
-    if (!sp.marker.collapsed) { continue }
-    var found = sp.marker.find(0);
-    var fromCmp = cmp(found.from, from) || extraLeft(sp.marker) - extraLeft(marker);
-    var toCmp = cmp(found.to, to) || extraRight(sp.marker) - extraRight(marker);
-    if (fromCmp >= 0 && toCmp <= 0 || fromCmp <= 0 && toCmp >= 0) { continue }
-    if (fromCmp <= 0 && (sp.marker.inclusiveRight && marker.inclusiveLeft ? cmp(found.to, from) >= 0 : cmp(found.to, from) > 0) ||
-        fromCmp >= 0 && (sp.marker.inclusiveRight && marker.inclusiveLeft ? cmp(found.from, to) <= 0 : cmp(found.from, to) < 0))
-      { return true }
-  } }
-}
-
-// A visual line is a line as drawn on the screen. Folding, for
-// example, can cause multiple logical lines to appear on the same
-// visual line. This finds the start of the visual line that the
-// given line is part of (usually that is the line itself).
-function visualLine(line) {
-  var merged;
-  while (merged = collapsedSpanAtStart(line))
-    { line = merged.find(-1, true).line; }
-  return line
-}
-
-function visualLineEnd(line) {
-  var merged;
-  while (merged = collapsedSpanAtEnd(line))
-    { line = merged.find(1, true).line; }
-  return line
-}
-
-// Returns an array of logical lines that continue the visual line
-// started by the argument, or undefined if there are no such lines.
-function visualLineContinued(line) {
-  var merged, lines;
-  while (merged = collapsedSpanAtEnd(line)) {
-    line = merged.find(1, true).line
-    ;(lines || (lines = [])).push(line);
-  }
-  return lines
-}
-
-// Get the line number of the start of the visual line that the
-// given line number is part of.
-function visualLineNo(doc, lineN) {
-  var line = getLine(doc, lineN), vis = visualLine(line);
-  if (line == vis) { return lineN }
-  return lineNo(vis)
-}
-
-// Get the line number of the start of the next visual line after
-// the given line.
-function visualLineEndNo(doc, lineN) {
-  if (lineN > doc.lastLine()) { return lineN }
-  var line = getLine(doc, lineN), merged;
-  if (!lineIsHidden(doc, line)) { return lineN }
-  while (merged = collapsedSpanAtEnd(line))
-    { line = merged.find(1, true).line; }
-  return lineNo(line) + 1
-}
-
-// Compute whether a line is hidden. Lines count as hidden when they
-// are part of a visual line that starts with another line, or when
-// they are entirely covered by collapsed, non-widget span.
-function lineIsHidden(doc, line) {
-  var sps = sawCollapsedSpans && line.markedSpans;
-  if (sps) { for (var sp = (void 0), i = 0; i < sps.length; ++i) {
-    sp = sps[i];
-    if (!sp.marker.collapsed) { continue }
-    if (sp.from == null) { return true }
-    if (sp.marker.widgetNode) { continue }
-    if (sp.from == 0 && sp.marker.inclusiveLeft && lineIsHiddenInner(doc, line, sp))
-      { return true }
-  } }
-}
-function lineIsHiddenInner(doc, line, span) {
-  if (span.to == null) {
-    var end = span.marker.find(1, true);
-    return lineIsHiddenInner(doc, end.line, getMarkedSpanFor(end.line.markedSpans, span.marker))
-  }
-  if (span.marker.inclusiveRight && span.to == line.text.length)
-    { return true }
-  for (var sp = (void 0), i = 0; i < line.markedSpans.length; ++i) {
-    sp = line.markedSpans[i];
-    if (sp.marker.collapsed && !sp.marker.widgetNode && sp.from == span.to &&
-        (sp.to == null || sp.to != span.from) &&
-        (sp.marker.inclusiveLeft || span.marker.inclusiveRight) &&
-        lineIsHiddenInner(doc, line, sp)) { return true }
-  }
-}
-
-// Find the height above the given line.
-function heightAtLine(lineObj) {
-  lineObj = visualLine(lineObj);
-
-  var h = 0, chunk = lineObj.parent;
-  for (var i = 0; i < chunk.lines.length; ++i) {
-    var line = chunk.lines[i];
-    if (line == lineObj) { break }
-    else { h += line.height; }
-  }
-  for (var p = chunk.parent; p; chunk = p, p = chunk.parent) {
-    for (var i$1 = 0; i$1 < p.children.length; ++i$1) {
-      var cur = p.children[i$1];
-      if (cur == chunk) { break }
-      else { h += cur.height; }
-    }
-  }
-  return h
-}
-
-// Compute the character length of a line, taking into account
-// collapsed ranges (see markText) that might hide parts, and join
-// other lines onto it.
-function lineLength(line) {
-  if (line.height == 0) { return 0 }
-  var len = line.text.length, merged, cur = line;
-  while (merged = collapsedSpanAtStart(cur)) {
-    var found = merged.find(0, true);
-    cur = found.from.line;
-    len += found.from.ch - found.to.ch;
-  }
-  cur = line;
-  while (merged = collapsedSpanAtEnd(cur)) {
-    var found$1 = merged.find(0, true);
-    len -= cur.text.length - found$1.from.ch;
-    cur = found$1.to.line;
-    len += cur.text.length - found$1.to.ch;
-  }
-  return len
-}
-
-// Find the longest line in the document.
-function findMaxLine(cm) {
-  var d = cm.display, doc = cm.doc;
-  d.maxLine = getLine(doc, doc.first);
-  d.maxLineLength = lineLength(d.maxLine);
-  d.maxLineChanged = true;
-  doc.iter(function (line) {
-    var len = lineLength(line);
-    if (len > d.maxLineLength) {
-      d.maxLineLength = len;
-      d.maxLine = line;
-    }
-  });
-}
-
-// BIDI HELPERS
-
-function iterateBidiSections(order, from, to, f) {
-  if (!order) { return f(from, to, "ltr", 0) }
-  var found = false;
-  for (var i = 0; i < order.length; ++i) {
-    var part = order[i];
-    if (part.from < to && part.to > from || from == to && part.to == from) {
-      f(Math.max(part.from, from), Math.min(part.to, to), part.level == 1 ? "rtl" : "ltr", i);
-      found = true;
-    }
-  }
-  if (!found) { f(from, to, "ltr"); }
-}
-
-var bidiOther = null;
-function getBidiPartAt(order, ch, sticky) {
-  var found;
-  bidiOther = null;
-  for (var i = 0; i < order.length; ++i) {
-    var cur = order[i];
-    if (cur.from < ch && cur.to > ch) { return i }
-    if (cur.to == ch) {
-      if (cur.from != cur.to && sticky == "before") { found = i; }
-      else { bidiOther = i; }
-    }
-    if (cur.from == ch) {
-      if (cur.from != cur.to && sticky != "before") { found = i; }
-      else { bidiOther = i; }
-    }
-  }
-  return found != null ? found : bidiOther
-}
-
-// Bidirectional ordering algorithm
-// See http://unicode.org/reports/tr9/tr9-13.html for the algorithm
-// that this (partially) implements.
-
-// One-char codes used for character types:
-// L (L):   Left-to-Right
-// R (R):   Right-to-Left
-// r (AL):  Right-to-Left Arabic
-// 1 (EN):  European Number
-// + (ES):  European Number Separator
-// % (ET):  European Number Terminator
-// n (AN):  Arabic Number
-// , (CS):  Common Number Separator
-// m (NSM): Non-Spacing Mark
-// b (BN):  Boundary Neutral
-// s (B):   Paragraph Separator
-// t (S):   Segment Separator
-// w (WS):  Whitespace
-// N (ON):  Other Neutrals
-
-// Returns null if characters are ordered as they appear
-// (left-to-right), or an array of sections ({from, to, level}
-// objects) in the order in which they occur visually.
-var bidiOrdering = (function() {
-  // Character types for codepoints 0 to 0xff
-  var lowTypes = "bbbbbbbbbtstwsbbbbbbbbbbbbbbssstwNN%%%NNNNNN,N,N1111111111NNNNNNNLLLLLLLLLLLLLLLLLLLLLLLLLLNNNNNNLLLLLLLLLLLLLLLLLLLLLLLLLLNNNNbbbbbbsbbbbbbbbbbbbbbbbbbbbbbbbbb,N%%%%NNNNLNNNNN%%11NLNNN1LNNNNNLLLLLLLLLLLLLLLLLLLLLLLNLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLN";
-  // Character types for codepoints 0x600 to 0x6f9
-  var arabicTypes = "nnnnnnNNr%%r,rNNmmmmmmmmmmmrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrmmmmmmmmmmmmmmmmmmmmmnnnnnnnnnn%nnrrrmrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrmmmmmmmnNmmmmmmrrmmNmmmmrr1111111111";
-  function charType(code) {
-    if (code <= 0xf7) { return lowTypes.charAt(code) }
-    else if (0x590 <= code && code <= 0x5f4) { return "R" }
-    else if (0x600 <= code && code <= 0x6f9) { return arabicTypes.charAt(code - 0x600) }
-    else if (0x6ee <= code && code <= 0x8ac) { return "r" }
-    else if (0x2000 <= code && code <= 0x200b) { return "w" }
-    else if (code == 0x200c) { return "b" }
-    else { return "L" }
-  }
-
-  var bidiRE = /[\u0590-\u05f4\u0600-\u06ff\u0700-\u08ac]/;
-  var isNeutral = /[stwN]/, isStrong = /[LRr]/, countsAsLeft = /[Lb1n]/, countsAsNum = /[1n]/;
-
-  function BidiSpan(level, from, to) {
-    this.level = level;
-    this.from = from; this.to = to;
-  }
-
-  return function(str, direction) {
-    var outerType = direction == "ltr" ? "L" : "R";
-
-    if (str.length == 0 || direction == "ltr" && !bidiRE.test(str)) { return false }
-    var len = str.length, types = [];
-    for (var i = 0; i < len; ++i)
-      { types.push(charType(str.charCodeAt(i))); }
-
-    // W1. Examine each non-spacing mark (NSM) in the level run, and
-    // change the type of the NSM to the type of the previous
-    // character. If the NSM is at the start of the level run, it will
-    // get the type of sor.
-    for (var i$1 = 0, prev = outerType; i$1 < len; ++i$1) {
-      var type = types[i$1];
-      if (type == "m") { types[i$1] = prev; }
-      else { prev = type; }
-    }
-
-    // W2. Search backwards from each instance of a European number
-    // until the first strong type (R, L, AL, or sor) is found. If an
-    // AL is found, change the type of the European number to Arabic
-    // number.
-    // W3. Change all ALs to R.
-    for (var i$2 = 0, cur = outerType; i$2 < len; ++i$2) {
-      var type$1 = types[i$2];
-      if (type$1 == "1" && cur == "r") { types[i$2] = "n"; }
-      else if (isStrong.test(type$1)) { cur = type$1; if (type$1 == "r") { types[i$2] = "R"; } }
-    }
-
-    // W4. A single European separator between two European numbers
-    // changes to a European number. A single common separator between
-    // two numbers of the same type changes to that type.
-    for (var i$3 = 1, prev$1 = types[0]; i$3 < len - 1; ++i$3) {
-      var type$2 = types[i$3];
-      if (type$2 == "+" && prev$1 == "1" && types[i$3+1] == "1") { types[i$3] = "1"; }
-      else if (type$2 == "," && prev$1 == types[i$3+1] &&
-               (prev$1 == "1" || prev$1 == "n")) { types[i$3] = prev$1; }
-      prev$1 = type$2;
-    }
-
-    // W5. A sequence of European terminators adjacent to European
-    // numbers changes to all European numbers.
-    // W6. Otherwise, separators and terminators change to Other
-    // Neutral.
-    for (var i$4 = 0; i$4 < len; ++i$4) {
-      var type$3 = types[i$4];
-      if (type$3 == ",") { types[i$4] = "N"; }
-      else if (type$3 == "%") {
-        var end = (void 0);
-        for (end = i$4 + 1; end < len && types[end] == "%"; ++end) {}
-        var replace = (i$4 && types[i$4-1] == "!") || (end < len && types[end] == "1") ? "1" : "N";
-        for (var j = i$4; j < end; ++j) { types[j] = replace; }
-        i$4 = end - 1;
-      }
-    }
-
-    // W7. Search backwards from each instance of a European number
-    // until the first strong type (R, L, or sor) is found. If an L is
-    // found, then change the type of the European number to L.
-    for (var i$5 = 0, cur$1 = outerType; i$5 < len; ++i$5) {
-      var type$4 = types[i$5];
-      if (cur$1 == "L" && type$4 == "1") { types[i$5] = "L"; }
-      else if (isStrong.test(type$4)) { cur$1 = type$4; }
-    }
-
-    // N1. A sequence of neutrals takes the direction of the
-    // surrounding strong text if the text on both sides has the same
-    // direction. European and Arabic numbers act as if they were R in
-    // terms of their influence on neutrals. Start-of-level-run (sor)
-    // and end-of-level-run (eor) are used at level run boundaries.
-    // N2. Any remaining neutrals take the embedding direction.
-    for (var i$6 = 0; i$6 < len; ++i$6) {
-      if (isNeutral.test(types[i$6])) {
-        var end$1 = (void 0);
-        for (end$1 = i$6 + 1; end$1 < len && isNeutral.test(types[end$1]); ++end$1) {}
-        var before = (i$6 ? types[i$6-1] : outerType) == "L";
-        var after = (end$1 < len ? types[end$1] : outerType) == "L";
-        var replace$1 = before == after ? (before ? "L" : "R") : outerType;
-        for (var j$1 = i$6; j$1 < end$1; ++j$1) { types[j$1] = replace$1; }
-        i$6 = end$1 - 1;
-      }
-    }
-
-    // Here we depart from the documented algorithm, in order to avoid
-    // building up an actual levels array. Since there are only three
-    // levels (0, 1, 2) in an implementation that doesn't take
-    // explicit embedding into account, we can build up the order on
-    // the fly, without following the level-based algorithm.
-    var order = [], m;
-    for (var i$7 = 0; i$7 < len;) {
-      if (countsAsLeft.test(types[i$7])) {
-        var start = i$7;
-        for (++i$7; i$7 < len && countsAsLeft.test(types[i$7]); ++i$7) {}
-        order.push(new BidiSpan(0, start, i$7));
-      } else {
-        var pos = i$7, at = order.length;
-        for (++i$7; i$7 < len && types[i$7] != "L"; ++i$7) {}
-        for (var j$2 = pos; j$2 < i$7;) {
-          if (countsAsNum.test(types[j$2])) {
-            if (pos < j$2) { order.splice(at, 0, new BidiSpan(1, pos, j$2)); }
-            var nstart = j$2;
-            for (++j$2; j$2 < i$7 && countsAsNum.test(types[j$2]); ++j$2) {}
-            order.splice(at, 0, new BidiSpan(2, nstart, j$2));
-            pos = j$2;
-          } else { ++j$2; }
-        }
-        if (pos < i$7) { order.splice(at, 0, new BidiSpan(1, pos, i$7)); }
-      }
-    }
-    if (direction == "ltr") {
-      if (order[0].level == 1 && (m = str.match(/^\s+/))) {
-        order[0].from = m[0].length;
-        order.unshift(new BidiSpan(0, 0, m[0].length));
-      }
-      if (lst(order).level == 1 && (m = str.match(/\s+$/))) {
-        lst(order).to -= m[0].length;
-        order.push(new BidiSpan(0, len - m[0].length, len));
-      }
-    }
-
-    return direction == "rtl" ? order.reverse() : order
-  }
-})();
-
-// Get the bidi ordering for the given line (and cache it). Returns
-// false for lines that are fully left-to-right, and an array of
-// BidiSpan objects otherwise.
-function getOrder(line, direction) {
-  var order = line.order;
-  if (order == null) { order = line.order = bidiOrdering(line.text, direction); }
-  return order
-}
-
-// EVENT HANDLING
-
-// Lightweight event framework. on/off also work on DOM nodes,
-// registering native DOM handlers.
-
-var noHandlers = [];
-
-var on = function(emitter, type, f) {
-  if (emitter.addEventListener) {
-    emitter.addEventListener(type, f, false);
-  } else if (emitter.attachEvent) {
-    emitter.attachEvent("on" + type, f);
-  } else {
-    var map$$1 = emitter._handlers || (emitter._handlers = {});
-    map$$1[type] = (map$$1[type] || noHandlers).concat(f);
-  }
-};
-
-function getHandlers(emitter, type) {
-  return emitter._handlers && emitter._handlers[type] || noHandlers
-}
-
-function off(emitter, type, f) {
-  if (emitter.removeEventListener) {
-    emitter.removeEventListener(type, f, false);
-  } else if (emitter.detachEvent) {
-    emitter.detachEvent("on" + type, f);
-  } else {
-    var map$$1 = emitter._handlers, arr = map$$1 && map$$1[type];
-    if (arr) {
-      var index = indexOf(arr, f);
-      if (index > -1)
-        { map$$1[type] = arr.slice(0, index).concat(arr.slice(index + 1)); }
-    }
-  }
-}
-
-function signal(emitter, type /*, values...*/) {
-  var handlers = getHandlers(emitter, type);
-  if (!handlers.length) { return }
-  var args = Array.prototype.slice.call(arguments, 2);
-  for (var i = 0; i < handlers.length; ++i) { handlers[i].apply(null, args); }
-}
-
-// The DOM events that CodeMirror handles can be overridden by
-// registering a (non-DOM) handler on the editor for the event name,
-// and preventDefault-ing the event in that handler.
-function signalDOMEvent(cm, e, override) {
-  if (typeof e == "string")
-    { e = {type: e, preventDefault: function() { this.defaultPrevented = true; }}; }
-  signal(cm, override || e.type, cm, e);
-  return e_defaultPrevented(e) || e.codemirrorIgnore
-}
-
-function signalCursorActivity(cm) {
-  var arr = cm._handlers && cm._handlers.cursorActivity;
-  if (!arr) { return }
-  var set = cm.curOp.cursorActivityHandlers || (cm.curOp.cursorActivityHandlers = []);
-  for (var i = 0; i < arr.length; ++i) { if (indexOf(set, arr[i]) == -1)
-    { set.push(arr[i]); } }
-}
-
-function hasHandler(emitter, type) {
-  return getHandlers(emitter, type).length > 0
-}
-
-// Add on and off methods to a constructor's prototype, to make
-// registering events on such objects more convenient.
-function eventMixin(ctor) {
-  ctor.prototype.on = function(type, f) {on(this, type, f);};
-  ctor.prototype.off = function(type, f) {off(this, type, f);};
-}
-
-// Due to the fact that we still support jurassic IE versions, some
-// compatibility wrappers are needed.
-
-function e_preventDefault(e) {
-  if (e.preventDefault) { e.preventDefault(); }
-  else { e.returnValue = false; }
-}
-function e_stopPropagation(e) {
-  if (e.stopPropagation) { e.stopPropagation(); }
-  else { e.cancelBubble = true; }
-}
-function e_defaultPrevented(e) {
-  return e.defaultPrevented != null ? e.defaultPrevented : e.returnValue == false
-}
-function e_stop(e) {e_preventDefault(e); e_stopPropagation(e);}
-
-function e_target(e) {return e.target || e.srcElement}
-function e_button(e) {
-  var b = e.which;
-  if (b == null) {
-    if (e.button & 1) { b = 1; }
-    else if (e.button & 2) { b = 3; }
-    else if (e.button & 4) { b = 2; }
-  }
-  if (mac && e.ctrlKey && b == 1) { b = 3; }
-  return b
-}
-
-// Detect drag-and-drop
-var dragAndDrop = function() {
-  // There is *some* kind of drag-and-drop support in IE6-8, but I
-  // couldn't get it to work yet.
-  if (ie && ie_version < 9) { return false }
-  var div = elt('div');
-  return "draggable" in div || "dragDrop" in div
-}();
-
-var zwspSupported;
-function zeroWidthElement(measure) {
-  if (zwspSupported == null) {
-    var test = elt("span", "\u200b");
-    removeChildrenAndAdd(measure, elt("span", [test, document.createTextNode("x")]));
-    if (measure.firstChild.offsetHeight != 0)
-      { zwspSupported = test.offsetWidth <= 1 && test.offsetHeight > 2 && !(ie && ie_version < 8); }
-  }
-  var node = zwspSupported ? elt("span", "\u200b") :
-    elt("span", "\u00a0", null, "display: inline-block; width: 1px; margin-right: -1px");
-  node.setAttribute("cm-text", "");
-  return node
-}
-
-// Feature-detect IE's crummy client rect reporting for bidi text
-var badBidiRects;
-function hasBadBidiRects(measure) {
-  if (badBidiRects != null) { return badBidiRects }
-  var txt = removeChildrenAndAdd(measure, document.createTextNode("A\u062eA"));
-  var r0 = range(txt, 0, 1).getBoundingClientRect();
-  var r1 = range(txt, 1, 2).getBoundingClientRect();
-  removeChildren(measure);
-  if (!r0 || r0.left == r0.right) { return false } // Safari returns null in some cases (#2780)
-  return badBidiRects = (r1.right - r0.right < 3)
-}
-
-// See if "".split is the broken IE version, if so, provide an
-// alternative way to split lines.
-var splitLinesAuto = "\n\nb".split(/\n/).length != 3 ? function (string) {
-  var pos = 0, result = [], l = string.length;
-  while (pos <= l) {
-    var nl = string.indexOf("\n", pos);
-    if (nl == -1) { nl = string.length; }
-    var line = string.slice(pos, string.charAt(nl - 1) == "\r" ? nl - 1 : nl);
-    var rt = line.indexOf("\r");
-    if (rt != -1) {
-      result.push(line.slice(0, rt));
-      pos += rt + 1;
-    } else {
-      result.push(line);
-      pos = nl + 1;
-    }
-  }
-  return result
-} : function (string) { return string.split(/\r\n?|\n/); };
-
-var hasSelection = window.getSelection ? function (te) {
-  try { return te.selectionStart != te.selectionEnd }
-  catch(e) { return false }
-} : function (te) {
-  var range$$1;
-  try {range$$1 = te.ownerDocument.selection.createRange();}
-  catch(e) {}
-  if (!range$$1 || range$$1.parentElement() != te) { return false }
-  return range$$1.compareEndPoints("StartToEnd", range$$1) != 0
-};
-
-var hasCopyEvent = (function () {
-  var e = elt("div");
-  if ("oncopy" in e) { return true }
-  e.setAttribute("oncopy", "return;");
-  return typeof e.oncopy == "function"
-})();
-
-var badZoomedRects = null;
-function hasBadZoomedRects(measure) {
-  if (badZoomedRects != null) { return badZoomedRects }
-  var node = removeChildrenAndAdd(measure, elt("span", "x"));
-  var normal = node.getBoundingClientRect();
-  var fromRange = range(node, 0, 1).getBoundingClientRect();
-  return badZoomedRects = Math.abs(normal.left - fromRange.left) > 1
-}
-
-// Known modes, by name and by MIME
-var modes = {};
-var mimeModes = {};
-
-// Extra arguments are stored as the mode's dependencies, which is
-// used by (legacy) mechanisms like loadmode.js to automatically
-// load a mode. (Preferred mechanism is the require/define calls.)
-function defineMode(name, mode) {
-  if (arguments.length > 2)
-    { mode.dependencies = Array.prototype.slice.call(arguments, 2); }
-  modes[name] = mode;
-}
-
-function defineMIME(mime, spec) {
-  mimeModes[mime] = spec;
-}
-
-// Given a MIME type, a {name, ...options} config object, or a name
-// string, return a mode config object.
-function resolveMode(spec) {
-  if (typeof spec == "string" && mimeModes.hasOwnProperty(spec)) {
-    spec = mimeModes[spec];
-  } else if (spec && typeof spec.name == "string" && mimeModes.hasOwnProperty(spec.name)) {
-    var found = mimeModes[spec.name];
-    if (typeof found == "string") { found = {name: found}; }
-    spec = createObj(found, spec);
-    spec.name = found.name;
-  } else if (typeof spec == "string" && /^[\w\-]+\/[\w\-]+\+xml$/.test(spec)) {
-    return resolveMode("application/xml")
-  } else if (typeof spec == "string" && /^[\w\-]+\/[\w\-]+\+json$/.test(spec)) {
-    return resolveMode("application/json")
-  }
-  if (typeof spec == "string") { return {name: spec} }
-  else { return spec || {name: "null"} }
-}
-
-// Given a mode spec (anything that resolveMode accepts), find and
-// initialize an actual mode object.
-function getMode(options, spec) {
-  spec = resolveMode(spec);
-  var mfactory = modes[spec.name];
-  if (!mfactory) { return getMode(options, "text/plain") }
-  var modeObj = mfactory(options, spec);
-  if (modeExtensions.hasOwnProperty(spec.name)) {
-    var exts = modeExtensions[spec.name];
-    for (var prop in exts) {
-      if (!exts.hasOwnProperty(prop)) { continue }
-      if (modeObj.hasOwnProperty(prop)) { modeObj["_" + prop] = modeObj[prop]; }
-      modeObj[prop] = exts[prop];
-    }
-  }
-  modeObj.name = spec.name;
-  if (spec.helperType) { modeObj.helperType = spec.helperType; }
-  if (spec.modeProps) { for (var prop$1 in spec.modeProps)
-    { modeObj[prop$1] = spec.modeProps[prop$1]; } }
-
-  return modeObj
-}
-
-// This can be used to attach properties to mode objects from
-// outside the actual mode definition.
-var modeExtensions = {};
-function extendMode(mode, properties) {
-  var exts = modeExtensions.hasOwnProperty(mode) ? modeExtensions[mode] : (modeExtensions[mode] = {});
-  copyObj(properties, exts);
-}
-
-function copyState(mode, state) {
-  if (state === true) { return state }
-  if (mode.copyState) { return mode.copyState(state) }
-  var nstate = {};
-  for (var n in state) {
-    var val = state[n];
-    if (val instanceof Array) { val = val.concat([]); }
-    nstate[n] = val;
-  }
-  return nstate
-}
-
-// Given a mode and a state (for that mode), find the inner mode and
-// state at the position that the state refers to.
-function innerMode(mode, state) {
-  var info;
-  while (mode.innerMode) {
-    info = mode.innerMode(state);
-    if (!info || info.mode == mode) { break }
-    state = info.state;
-    mode = info.mode;
-  }
-  return info || {mode: mode, state: state}
-}
-
-function startState(mode, a1, a2) {
-  return mode.startState ? mode.startState(a1, a2) : true
-}
-
-// STRING STREAM
-
-// Fed to the mode parsers, provides helper functions to make
-// parsers more succinct.
-
-var StringStream = function(string, tabSize, lineOracle) {
-  this.pos = this.start = 0;
-  this.string = string;
-  this.tabSize = tabSize || 8;
-  this.lastColumnPos = this.lastColumnValue = 0;
-  this.lineStart = 0;
-  this.lineOracle = lineOracle;
-};
-
-StringStream.prototype.eol = function () {return this.pos >= this.string.length};
-StringStream.prototype.sol = function () {return this.pos == this.lineStart};
-StringStream.prototype.peek = function () {return this.string.charAt(this.pos) || undefined};
-StringStream.prototype.next = function () {
-  if (this.pos < this.string.length)
-    { return this.string.charAt(this.pos++) }
-};
-StringStream.prototype.eat = function (match) {
-  var ch = this.string.charAt(this.pos);
-  var ok;
-  if (typeof match == "string") { ok = ch == match; }
-  else { ok = ch && (match.test ? match.test(ch) : match(ch)); }
-  if (ok) {++this.pos; return ch}
-};
-StringStream.prototype.eatWhile = function (match) {
-  var start = this.pos;
-  while (this.eat(match)){}
-  return this.pos > start
-};
-StringStream.prototype.eatSpace = function () {
-    var this$1 = this;
-
-  var start = this.pos;
-  while (/[\s\u00a0]/.test(this.string.charAt(this.pos))) { ++this$1.pos; }
-  return this.pos > start
-};
-StringStream.prototype.skipToEnd = function () {this.pos = this.string.length;};
-StringStream.prototype.skipTo = function (ch) {
-  var found = this.string.indexOf(ch, this.pos);
-  if (found > -1) {this.pos = found; return true}
-};
-StringStream.prototype.backUp = function (n) {this.pos -= n;};
-StringStream.prototype.column = function () {
-  if (this.lastColumnPos < this.start) {
-    this.lastColumnValue = countColumn(this.string, this.start, this.tabSize, this.lastColumnPos, this.lastColumnValue);
-    this.lastColumnPos = this.start;
-  }
-  return this.lastColumnValue - (this.lineStart ? countColumn(this.string, this.lineStart, this.tabSize) : 0)
-};
-StringStream.prototype.indentation = function () {
-  return countColumn(this.string, null, this.tabSize) -
-    (this.lineStart ? countColumn(this.string, this.lineStart, this.tabSize) : 0)
-};
-StringStream.prototype.match = function (pattern, consume, caseInsensitive) {
-  if (typeof pattern == "string") {
-    var cased = function (str) { return caseInsensitive ? str.toLowerCase() : str; };
-    var substr = this.string.substr(this.pos, pattern.length);
-    if (cased(substr) == cased(pattern)) {
-      if (consume !== false) { this.pos += pattern.length; }
-      return true
-    }
-  } else {
-    var match = this.string.slice(this.pos).match(pattern);
-    if (match && match.index > 0) { return null }
-    if (match && consume !== false) { this.pos += match[0].length; }
-    return match
-  }
-};
-StringStream.prototype.current = function (){return this.string.slice(this.start, this.pos)};
-StringStream.prototype.hideFirstChars = function (n, inner) {
-  this.lineStart += n;
-  try { return inner() }
-  finally { this.lineStart -= n; }
-};
-StringStream.prototype.lookAhead = function (n) {
-  var oracle = this.lineOracle;
-  return oracle && oracle.lookAhead(n)
-};
-StringStream.prototype.baseToken = function () {
-  var oracle = this.lineOracle;
-  return oracle && oracle.baseToken(this.pos)
-};
-
-var SavedContext = function(state, lookAhead) {
-  this.state = state;
-  this.lookAhead = lookAhead;
-};
-
-var Context = function(doc, state, line, lookAhead) {
-  this.state = state;
-  this.doc = doc;
-  this.line = line;
-  this.maxLookAhead = lookAhead || 0;
-  this.baseTokens = null;
-  this.baseTokenPos = 1;
-};
-
-Context.prototype.lookAhead = function (n) {
-  var line = this.doc.getLine(this.line + n);
-  if (line != null && n > this.maxLookAhead) { this.maxLookAhead = n; }
-  return line
-};
-
-Context.prototype.baseToken = function (n) {
-    var this$1 = this;
-
-  if (!this.baseTokens) { return null }
-  while (this.baseTokens[this.baseTokenPos] <= n)
-    { this$1.baseTokenPos += 2; }
-  var type = this.baseTokens[this.baseTokenPos + 1];
-  return {type: type && type.replace(/( |^)overlay .*/, ""),
-          size: this.baseTokens[this.baseTokenPos] - n}
-};
-
-Context.prototype.nextLine = function () {
-  this.line++;
-  if (this.maxLookAhead > 0) { this.maxLookAhead--; }
-};
-
-Context.fromSaved = function (doc, saved, line) {
-  if (saved instanceof SavedContext)
-    { return new Context(doc, copyState(doc.mode, saved.state), line, saved.lookAhead) }
-  else
-    { return new Context(doc, copyState(doc.mode, saved), line) }
-};
-
-Context.prototype.save = function (copy) {
-  var state = copy !== false ? copyState(this.doc.mode, this.state) : this.state;
-  return this.maxLookAhead > 0 ? new SavedContext(state, this.maxLookAhead) : state
-};
-
-
-// Compute a style array (an array starting with a mode generation
-// -- for invalidation -- followed by pairs of end positions and
-// style strings), which is used to highlight the tokens on the
-// line.
-function highlightLine(cm, line, context, forceToEnd) {
-  // A styles array always starts with a number identifying the
-  // mode/overlays that it is based on (for easy invalidation).
-  var st = [cm.state.modeGen], lineClasses = {};
-  // Compute the base array of styles
-  runMode(cm, line.text, cm.doc.mode, context, function (end, style) { return st.push(end, style); },
-          lineClasses, forceToEnd);
-  var state = context.state;
-
-  // Run overlays, adjust style array.
-  var loop = function ( o ) {
-    context.baseTokens = st;
-    var overlay = cm.state.overlays[o], i = 1, at = 0;
-    context.state = true;
-    runMode(cm, line.text, overlay.mode, context, function (end, style) {
-      var start = i;
-      // Ensure there's a token end at the current position, and that i points at it
-      while (at < end) {
-        var i_end = st[i];
-        if (i_end > end)
-          { st.splice(i, 1, end, st[i+1], i_end); }
-        i += 2;
-        at = Math.min(end, i_end);
-      }
-      if (!style) { return }
-      if (overlay.opaque) {
-        st.splice(start, i - start, end, "overlay " + style);
-        i = start + 2;
-      } else {
-        for (; start < i; start += 2) {
-          var cur = st[start+1];
-          st[start+1] = (cur ? cur + " " : "") + "overlay " + style;
-        }
-      }
-    }, lineClasses);
-    context.state = state;
-    context.baseTokens = null;
-    context.baseTokenPos = 1;
-  };
-
-  for (var o = 0; o < cm.state.overlays.length; ++o) loop( o );
-
-  return {styles: st, classes: lineClasses.bgClass || lineClasses.textClass ? lineClasses : null}
-}
-
-function getLineStyles(cm, line, updateFrontier) {
-  if (!line.styles || line.styles[0] != cm.state.modeGen) {
-    var context = getContextBefore(cm, lineNo(line));
-    var resetState = line.text.length > cm.options.maxHighlightLength && copyState(cm.doc.mode, context.state);
-    var result = highlightLine(cm, line, context);
-    if (resetState) { context.state = resetState; }
-    line.stateAfter = context.save(!resetState);
-    line.styles = result.styles;
-    if (result.classes) { line.styleClasses = result.classes; }
-    else if (line.styleClasses) { line.styleClasses = null; }
-    if (updateFrontier === cm.doc.highlightFrontier)
-      { cm.doc.modeFrontier = Math.max(cm.doc.modeFrontier, ++cm.doc.highlightFrontier); }
-  }
-  return line.styles
-}
-
-function getContextBefore(cm, n, precise) {
-  var doc = cm.doc, display = cm.display;
-  if (!doc.mode.startState) { return new Context(doc, true, n) }
-  var start = findStartLine(cm, n, precise);
-  var saved = start > doc.first && getLine(doc, start - 1).stateAfter;
-  var context = saved ? Context.fromSaved(doc, saved, start) : new Context(doc, startState(doc.mode), start);
-
-  doc.iter(start, n, function (line) {
-    processLine(cm, line.text, context);
-    var pos = context.line;
-    line.stateAfter = pos == n - 1 || pos % 5 == 0 || pos >= display.viewFrom && pos < display.viewTo ? context.save() : null;
-    context.nextLine();
-  });
-  if (precise) { doc.modeFrontier = context.line; }
-  return context
-}
-
-// Lightweight form of highlight -- proceed over this line and
-// update state, but don't save a style array. Used for lines that
-// aren't currently visible.
-function processLine(cm, text, context, startAt) {
-  var mode = cm.doc.mode;
-  var stream = new StringStream(text, cm.options.tabSize, context);
-  stream.start = stream.pos = startAt || 0;
-  if (text == "") { callBlankLine(mode, context.state); }
-  while (!stream.eol()) {
-    readToken(mode, stream, context.state);
-    stream.start = stream.pos;
-  }
-}
-
-function callBlankLine(mode, state) {
-  if (mode.blankLine) { return mode.blankLine(state) }
-  if (!mode.innerMode) { return }
-  var inner = innerMode(mode, state);
-  if (inner.mode.blankLine) { return inner.mode.blankLine(inner.state) }
-}
-
-function readToken(mode, stream, state, inner) {
-  for (var i = 0; i < 10; i++) {
-    if (inner) { inner[0] = innerMode(mode, state).mode; }
-    var style = mode.token(stream, state);
-    if (stream.pos > stream.start) { return style }
-  }
-  throw new Error("Mode " + mode.name + " failed to advance stream.")
-}
-
-var Token = function(stream, type, state) {
-  this.start = stream.start; this.end = stream.pos;
-  this.string = stream.current();
-  this.type = type || null;
-  this.state = state;
-};
-
-// Utility for getTokenAt and getLineTokens
-function takeToken(cm, pos, precise, asArray) {
-  var doc = cm.doc, mode = doc.mode, style;
-  pos = clipPos(doc, pos);
-  var line = getLine(doc, pos.line), context = getContextBefore(cm, pos.line, precise);
-  var stream = new StringStream(line.text, cm.options.tabSize, context), tokens;
-  if (asArray) { tokens = []; }
-  while ((asArray || stream.pos < pos.ch) && !stream.eol()) {
-    stream.start = stream.pos;
-    style = readToken(mode, stream, context.state);
-    if (asArray) { tokens.push(new Token(stream, style, copyState(doc.mode, context.state))); }
-  }
-  return asArray ? tokens : new Token(stream, style, context.state)
-}
-
-function extractLineClasses(type, output) {
-  if (type) { for (;;) {
-    var lineClass = type.match(/(?:^|\s+)line-(background-)?(\S+)/);
-    if (!lineClass) { break }
-    type = type.slice(0, lineClass.index) + type.slice(lineClass.index + lineClass[0].length);
-    var prop = lineClass[1] ? "bgClass" : "textClass";
-    if (output[prop] == null)
-      { output[prop] = lineClass[2]; }
-    else if (!(new RegExp("(?:^|\s)" + lineClass[2] + "(?:$|\s)")).test(output[prop]))
-      { output[prop] += " " + lineClass[2]; }
-  } }
-  return type
-}
-
-// Run the given mode's parser over a line, calling f for each token.
-function runMode(cm, text, mode, context, f, lineClasses, forceToEnd) {
-  var flattenSpans = mode.flattenSpans;
-  if (flattenSpans == null) { flattenSpans = cm.options.flattenSpans; }
-  var curStart = 0, curStyle = null;
-  var stream = new StringStream(text, cm.options.tabSize, context), style;
-  var inner = cm.options.addModeClass && [null];
-  if (text == "") { extractLineClasses(callBlankLine(mode, context.state), lineClasses); }
-  while (!stream.eol()) {
-    if (stream.pos > cm.options.maxHighlightLength) {
-      flattenSpans = false;
-      if (forceToEnd) { processLine(cm, text, context, stream.pos); }
-      stream.pos = text.length;
-      style = null;
-    } else {
-      style = extractLineClasses(readToken(mode, stream, context.state, inner), lineClasses);
-    }
-    if (inner) {
-      var mName = inner[0].name;
-      if (mName) { style = "m-" + (style ? mName + " " + style : mName); }
-    }
-    if (!flattenSpans || curStyle != style) {
-      while (curStart < stream.start) {
-        curStart = Math.min(stream.start, curStart + 5000);
-        f(curStart, curStyle);
-      }
-      curStyle = style;
-    }
-    stream.start = stream.pos;
-  }
-  while (curStart < stream.pos) {
-    // Webkit seems to refuse to render text nodes longer than 57444
-    // characters, and returns inaccurate measurements in nodes
-    // starting around 5000 chars.
-    var pos = Math.min(stream.pos, curStart + 5000);
-    f(pos, curStyle);
-    curStart = pos;
-  }
-}
-
-// Finds the line to start with when starting a parse. Tries to
-// find a line with a stateAfter, so that it can start with a
-// valid state. If that fails, it returns the line with the
-// smallest indentation, which tends to need the least context to
-// parse correctly.
-function findStartLine(cm, n, precise) {
-  var minindent, minline, doc = cm.doc;
-  var lim = precise ? -1 : n - (cm.doc.mode.innerMode ? 1000 : 100);
-  for (var search = n; search > lim; --search) {
-    if (search <= doc.first) { return doc.first }
-    var line = getLine(doc, search - 1), after = line.stateAfter;
-    if (after && (!precise || search + (after instanceof SavedContext ? after.lookAhead : 0) <= doc.modeFrontier))
-      { return search }
-    var indented = countColumn(line.text, null, cm.options.tabSize);
-    if (minline == null || minindent > indented) {
-      minline = search - 1;
-      minindent = indented;
-    }
-  }
-  return minline
-}
-
-function retreatFrontier(doc, n) {
-  doc.modeFrontier = Math.min(doc.modeFrontier, n);
-  if (doc.highlightFrontier < n - 10) { return }
-  var start = doc.first;
-  for (var line = n - 1; line > start; line--) {
-    var saved = getLine(doc, line).stateAfter;
-    // change is on 3
-    // state on line 1 looked ahead 2 -- so saw 3
-    // test 1 + 2 < 3 should cover this
-    if (saved && (!(saved instanceof SavedContext) || line + saved.lookAhead < n)) {
-      start = line + 1;
-      break
-    }
-  }
-  doc.highlightFrontier = Math.min(doc.highlightFrontier, start);
-}
-
-// LINE DATA STRUCTURE
-
-// Line objects. These hold state related to a line, including
-// highlighting info (the styles array).
-var Line = function(text, markedSpans, estimateHeight) {
-  this.text = text;
-  attachMarkedSpans(this, markedSpans);
-  this.height = estimateHeight ? estimateHeight(this) : 1;
-};
-
-Line.prototype.lineNo = function () { return lineNo(this) };
-eventMixin(Line);
-
-// Change the content (text, markers) of a line. Automatically
-// invalidates cached information and tries to re-estimate the
-// line's height.
-function updateLine(line, text, markedSpans, estimateHeight) {
-  line.text = text;
-  if (line.stateAfter) { line.stateAfter = null; }
-  if (line.styles) { line.styles = null; }
-  if (line.order != null) { line.order = null; }
-  detachMarkedSpans(line);
-  attachMarkedSpans(line, markedSpans);
-  var estHeight = estimateHeight ? estimateHeight(line) : 1;
-  if (estHeight != line.height) { updateLineHeight(line, estHeight); }
-}
-
-// Detach a line from the document tree and its markers.
-function cleanUpLine(line) {
-  line.parent = null;
-  detachMarkedSpans(line);
-}
-
-// Convert a style as returned by a mode (either null, or a string
-// containing one or more styles) to a CSS style. This is cached,
-// and also looks for line-wide styles.
-var styleToClassCache = {};
-var styleToClassCacheWithMode = {};
-function interpretTokenStyle(style, options) {
-  if (!style || /^\s*$/.test(style)) { return null }
-  var cache = options.addModeClass ? styleToClassCacheWithMode : styleToClassCache;
-  return cache[style] ||
-    (cache[style] = style.replace(/\S+/g, "cm-$&"))
-}
-
-// Render the DOM representation of the text of a line. Also builds
-// up a 'line map', which points at the DOM nodes that represent
-// specific stretches of text, and is used by the measuring code.
-// The returned object contains the DOM node, this map, and
-// information about line-wide styles that were set by the mode.
-function buildLineContent(cm, lineView) {
-  // The padding-right forces the element to have a 'border', which
-  // is needed on Webkit to be able to get line-level bounding
-  // rectangles for it (in measureChar).
-  var content = eltP("span", null, null, webkit ? "padding-right: .1px" : null);
-  var builder = {pre: eltP("pre", [content], "CodeMirror-line"), content: content,
-                 col: 0, pos: 0, cm: cm,
-                 trailingSpace: false,
-                 splitSpaces: (ie || webkit) && cm.getOption("lineWrapping")};
-  lineView.measure = {};
-
-  // Iterate over the logical lines that make up this visual line.
-  for (var i = 0; i <= (lineView.rest ? lineView.rest.length : 0); i++) {
-    var line = i ? lineView.rest[i - 1] : lineView.line, order = (void 0);
-    builder.pos = 0;
-    builder.addToken = buildToken;
-    // Optionally wire in some hacks into the token-rendering
-    // algorithm, to deal with browser quirks.
-    if (hasBadBidiRects(cm.display.measure) && (order = getOrder(line, cm.doc.direction)))
-      { builder.addToken = buildTokenBadBidi(builder.addToken, order); }
-    builder.map = [];
-    var allowFrontierUpdate = lineView != cm.display.externalMeasured && lineNo(line);
-    insertLineContent(line, builder, getLineStyles(cm, line, allowFrontierUpdate));
-    if (line.styleClasses) {
-      if (line.styleClasses.bgClass)
-        { builder.bgClass = joinClasses(line.styleClasses.bgClass, builder.bgClass || ""); }
-      if (line.styleClasses.textClass)
-        { builder.textClass = joinClasses(line.styleClasses.textClass, builder.textClass || ""); }
-    }
-
-    // Ensure at least a single node is present, for measuring.
-    if (builder.map.length == 0)
-      { builder.map.push(0, 0, builder.content.appendChild(zeroWidthElement(cm.display.measure))); }
-
-    // Store the map and a cache object for the current logical line
-    if (i == 0) {
-      lineView.measure.map = builder.map;
-      lineView.measure.cache = {};
-    } else {
-      (lineView.measure.maps || (lineView.measure.maps = [])).push(builder.map)
-      ;(lineView.measure.caches || (lineView.measure.caches = [])).push({});
-    }
-  }
-
-  // See issue #2901
-  if (webkit) {
-    var last = builder.content.lastChild;
-    if (/\bcm-tab\b/.test(last.className) || (last.querySelector && last.querySelector(".cm-tab")))
-      { builder.content.className = "cm-tab-wrap-hack"; }
-  }
-
-  signal(cm, "renderLine", cm, lineView.line, builder.pre);
-  if (builder.pre.className)
-    { builder.textClass = joinClasses(builder.pre.className, builder.textClass || ""); }
-
-  return builder
-}
-
-function defaultSpecialCharPlaceholder(ch) {
-  var token = elt("span", "\u2022", "cm-invalidchar");
-  token.title = "\\u" + ch.charCodeAt(0).toString(16);
-  token.setAttribute("aria-label", token.title);
-  return token
-}
-
-// Build up the DOM representation for a single token, and add it to
-// the line map. Takes care to render special characters separately.
-function buildToken(builder, text, style, startStyle, endStyle, title, css) {
-  if (!text) { return }
-  var displayText = builder.splitSpaces ? splitSpaces(text, builder.trailingSpace) : text;
-  var special = builder.cm.state.specialChars, mustWrap = false;
-  var content;
-  if (!special.test(text)) {
-    builder.col += text.length;
-    content = document.createTextNode(displayText);
-    builder.map.push(builder.pos, builder.pos + text.length, content);
-    if (ie && ie_version < 9) { mustWrap = true; }
-    builder.pos += text.length;
-  } else {
-    content = document.createDocumentFragment();
-    var pos = 0;
-    while (true) {
-      special.lastIndex = pos;
-      var m = special.exec(text);
-      var skipped = m ? m.index - pos : text.length - pos;
-      if (skipped) {
-        var txt = document.createTextNode(displayText.slice(pos, pos + skipped));
-        if (ie && ie_version < 9) { content.appendChild(elt("span", [txt])); }
-        else { content.appendChild(txt); }
-        builder.map.push(builder.pos, builder.pos + skipped, txt);
-        builder.col += skipped;
-        builder.pos += skipped;
-      }
-      if (!m) { break }
-      pos += skipped + 1;
-      var txt$1 = (void 0);
-      if (m[0] == "\t") {
-        var tabSize = builder.cm.options.tabSize, tabWidth = tabSize - builder.col % tabSize;
-        txt$1 = content.appendChild(elt("span", spaceStr(tabWidth), "cm-tab"));
-        txt$1.setAttribute("role", "presentation");
-        txt$1.setAttribute("cm-text", "\t");
-        builder.col += tabWidth;
-      } else if (m[0] == "\r" || m[0] == "\n") {
-        txt$1 = content.appendChild(elt("span", m[0] == "\r" ? "\u240d" : "\u2424", "cm-invalidchar"));
-        txt$1.setAttribute("cm-text", m[0]);
-        builder.col += 1;
-      } else {
-        txt$1 = builder.cm.options.specialCharPlaceholder(m[0]);
-        txt$1.setAttribute("cm-text", m[0]);
-        if (ie && ie_version < 9) { content.appendChild(elt("span", [txt$1])); }
-        else { content.appendChild(txt$1); }
-        builder.col += 1;
-      }
-      builder.map.push(builder.pos, builder.pos + 1, txt$1);
-      builder.pos++;
-    }
-  }
-  builder.trailingSpace = displayText.charCodeAt(text.length - 1) == 32;
-  if (style || startStyle || endStyle || mustWrap || css) {
-    var fullStyle = style || "";
-    if (startStyle) { fullStyle += startStyle; }
-    if (endStyle) { fullStyle += endStyle; }
-    var token = elt("span", [content], fullStyle, css);
-    if (title) { token.title = title; }
-    return builder.content.appendChild(token)
-  }
-  builder.content.appendChild(content);
-}
-
-function splitSpaces(text, trailingBefore) {
-  if (text.length > 1 && !/  /.test(text)) { return text }
-  var spaceBefore = trailingBefore, result = "";
-  for (var i = 0; i < text.length; i++) {
-    var ch = text.charAt(i);
-    if (ch == " " && spaceBefore && (i == text.length - 1 || text.charCodeAt(i + 1) == 32))
-      { ch = "\u00a0"; }
-    result += ch;
-    spaceBefore = ch == " ";
-  }
-  return result
-}
-
-// Work around nonsense dimensions being reported for stretches of
-// right-to-left text.
-function buildTokenBadBidi(inner, order) {
-  return function (builder, text, style, startStyle, endStyle, title, css) {
-    style = style ? style + " cm-force-border" : "cm-force-border";
-    var start = builder.pos, end = start + text.length;
-    for (;;) {
-      // Find the part that overlaps with the start of this text
-      var part = (void 0);
-      for (var i = 0; i < order.length; i++) {
-        part = order[i];
-        if (part.to > start && part.from <= start) { break }
-      }
-      if (part.to >= end) { return inner(builder, text, style, startStyle, endStyle, title, css) }
-      inner(builder, text.slice(0, part.to - start), style, startStyle, null, title, css);
-      startStyle = null;
-      text = text.slice(part.to - start);
-      start = part.to;
-    }
-  }
-}
-
-function buildCollapsedSpan(builder, size, marker, ignoreWidget) {
-  var widget = !ignoreWidget && marker.widgetNode;
-  if (widget) { builder.map.push(builder.pos, builder.pos + size, widget); }
-  if (!ignoreWidget && builder.cm.display.input.needsContentAttribute) {
-    if (!widget)
-      { widget = builder.content.appendChild(document.createElement("span")); }
-    widget.setAttribute("cm-marker", marker.id);
-  }
-  if (widget) {
-    builder.cm.display.input.setUneditable(widget);
-    builder.content.appendChild(widget);
-  }
-  builder.pos += size;
-  builder.trailingSpace = false;
-}
-
-// Outputs a number of spans to make up a line, taking highlighting
-// and marked text into account.
-function insertLineContent(line, builder, styles) {
-  var spans = line.markedSpans, allText = line.text, at = 0;
-  if (!spans) {
-    for (var i$1 = 1; i$1 < styles.length; i$1+=2)
-      { builder.addToken(builder, allText.slice(at, at = styles[i$1]), interpretTokenStyle(styles[i$1+1], builder.cm.options)); }
-    return
-  }
-
-  var len = allText.length, pos = 0, i = 1, text = "", style, css;
-  var nextChange = 0, spanStyle, spanEndStyle, spanStartStyle, title, collapsed;
-  for (;;) {
-    if (nextChange == pos) { // Update current marker set
-      spanStyle = spanEndStyle = spanStartStyle = title = css = "";
-      collapsed = null; nextChange = Infinity;
-      var foundBookmarks = [], endStyles = (void 0);
-      for (var j = 0; j < spans.length; ++j) {
-        var sp = spans[j], m = sp.marker;
-        if (m.type == "bookmark" && sp.from == pos && m.widgetNode) {
-          foundBookmarks.push(m);
-        } else if (sp.from <= pos && (sp.to == null || sp.to > pos || m.collapsed && sp.to == pos && sp.from == pos)) {
-          if (sp.to != null && sp.to != pos && nextChange > sp.to) {
-            nextChange = sp.to;
-            spanEndStyle = "";
-          }
-          if (m.className) { spanStyle += " " + m.className; }
-          if (m.css) { css = (css ? css + ";" : "") + m.css; }
-          if (m.startStyle && sp.from == pos) { spanStartStyle += " " + m.startStyle; }
-          if (m.endStyle && sp.to == nextChange) { (endStyles || (endStyles = [])).push(m.endStyle, sp.to); }
-          if (m.title && !title) { title = m.title; }
-          if (m.collapsed && (!collapsed || compareCollapsedMarkers(collapsed.marker, m) < 0))
-            { collapsed = sp; }
-        } else if (sp.from > pos && nextChange > sp.from) {
-          nextChange = sp.from;
-        }
-      }
-      if (endStyles) { for (var j$1 = 0; j$1 < endStyles.length; j$1 += 2)
-        { if (endStyles[j$1 + 1] == nextChange) { spanEndStyle += " " + endStyles[j$1]; } } }
-
-      if (!collapsed || collapsed.from == pos) { for (var j$2 = 0; j$2 < foundBookmarks.length; ++j$2)
-        { buildCollapsedSpan(builder, 0, foundBookmarks[j$2]); } }
-      if (collapsed && (collapsed.from || 0) == pos) {
-        buildCollapsedSpan(builder, (collapsed.to == null ? len + 1 : collapsed.to) - pos,
-                           collapsed.marker, collapsed.from == null);
-        if (collapsed.to == null) { return }
-        if (collapsed.to == pos) { collapsed = false; }
-      }
-    }
-    if (pos >= len) { break }
-
-    var upto = Math.min(len, nextChange);
-    while (true) {
-      if (text) {
-        var end = pos + text.length;
-        if (!collapsed) {
-          var tokenText = end > upto ? text.slice(0, upto - pos) : text;
-          builder.addToken(builder, tokenText, style ? style + spanStyle : spanStyle,
-                           spanStartStyle, pos + tokenText.length == nextChange ? spanEndStyle : "", title, css);
-        }
-        if (end >= upto) {text = text.slice(upto - pos); pos = upto; break}
-        pos = end;
-        spanStartStyle = "";
-      }
-      text = allText.slice(at, at = styles[i++]);
-      style = interpretTokenStyle(styles[i++], builder.cm.options);
-    }
-  }
-}
-
-
-// These objects are used to represent the visible (currently drawn)
-// part of the document. A LineView may correspond to multiple
-// logical lines, if those are connected by collapsed ranges.
-function LineView(doc, line, lineN) {
-  // The starting line
-  this.line = line;
-  // Continuing lines, if any
-  this.rest = visualLineContinued(line);
-  // Number of logical lines in this visual line
-  this.size = this.rest ? lineNo(lst(this.rest)) - lineN + 1 : 1;
-  this.node = this.text = null;
-  this.hidden = lineIsHidden(doc, line);
-}
-
-// Create a range of LineView objects for the given lines.
-function buildViewArray(cm, from, to) {
-  var array = [], nextPos;
-  for (var pos = from; pos < to; pos = nextPos) {
-    var view = new LineView(cm.doc, getLine(cm.doc, pos), pos);
-    nextPos = pos + view.size;
-    array.push(view);
-  }
-  return array
-}
-
-var operationGroup = null;
-
-function pushOperation(op) {
-  if (operationGroup) {
-    operationGroup.ops.push(op);
-  } else {
-    op.ownsGroup = operationGroup = {
-      ops: [op],
-      delayedCallbacks: []
-    };
-  }
-}
-
-function fireCallbacksForOps(group) {
-  // Calls delayed callbacks and cursorActivity handlers until no
-  // new ones appear
-  var callbacks = group.delayedCallbacks, i = 0;
-  do {
-    for (; i < callbacks.length; i++)
-      { callbacks[i].call(null); }
-    for (var j = 0; j < group.ops.length; j++) {
-      var op = group.ops[j];
-      if (op.cursorActivityHandlers)
-        { while (op.cursorActivityCalled < op.cursorActivityHandlers.length)
-          { op.cursorActivityHandlers[op.cursorActivityCalled++].call(null, op.cm); } }
-    }
-  } while (i < callbacks.length)
-}
-
-function finishOperation(op, endCb) {
-  var group = op.ownsGroup;
-  if (!group) { return }
-
-  try { fireCallbacksForOps(group); }
-  finally {
-    operationGroup = null;
-    endCb(group);
-  }
-}
-
-var orphanDelayedCallbacks = null;
-
-// Often, we want to signal events at a point where we are in the
-// middle of some work, but don't want the handler to start calling
-// other methods on the editor, which might be in an inconsistent
-// state or simply not expect any other events to happen.
-// signalLater looks whether there are any handlers, and schedules
-// them to be executed when the last operation ends, or, if no
-// operation is active, when a timeout fires.
-function signalLater(emitter, type /*, values...*/) {
-  var arr = getHandlers(emitter, type);
-  if (!arr.length) { return }
-  var args = Array.prototype.slice.call(arguments, 2), list;
-  if (operationGroup) {
-    list = operationGroup.delayedCallbacks;
-  } else if (orphanDelayedCallbacks) {
-    list = orphanDelayedCallbacks;
-  } else {
-    list = orphanDelayedCallbacks = [];
-    setTimeout(fireOrphanDelayed, 0);
-  }
-  var loop = function ( i ) {
-    list.push(function () { return arr[i].apply(null, args); });
-  };
-
-  for (var i = 0; i < arr.length; ++i)
-    loop( i );
-}
-
-function fireOrphanDelayed() {
-  var delayed = orphanDelayedCallbacks;
-  orphanDelayedCallbacks = null;
-  for (var i = 0; i < delayed.length; ++i) { delayed[i](); }
-}
-
-// When an aspect of a line changes, a string is added to
-// lineView.changes. This updates the relevant part of the line's
-// DOM structure.
-function updateLineForChanges(cm, lineView, lineN, dims) {
-  for (var j = 0; j < lineView.changes.length; j++) {
-    var type = lineView.changes[j];
-    if (type == "text") { updateLineText(cm, lineView); }
-    else if (type == "gutter") { updateLineGutter(cm, lineView, lineN, dims); }
-    else if (type == "class") { updateLineClasses(cm, lineView); }
-    else if (type == "widget") { updateLineWidgets(cm, lineView, dims); }
-  }
-  lineView.changes = null;
-}
-
-// Lines with gutter elements, widgets or a background class need to
-// be wrapped, and have the extra elements added to the wrapper div
-function ensureLineWrapped(lineView) {
-  if (lineView.node == lineView.text) {
-    lineView.node = elt("div", null, null, "position: relative");
-    if (lineView.text.parentNode)
-      { lineView.text.parentNode.replaceChild(lineView.node, lineView.text); }
-    lineView.node.appendChild(lineView.text);
-    if (ie && ie_version < 8) { lineView.node.style.zIndex = 2; }
-  }
-  return lineView.node
-}
-
-function updateLineBackground(cm, lineView) {
-  var cls = lineView.bgClass ? lineView.bgClass + " " + (lineView.line.bgClass || "") : lineView.line.bgClass;
-  if (cls) { cls += " CodeMirror-linebackground"; }
-  if (lineView.background) {
-    if (cls) { lineView.background.className = cls; }
-    else { lineView.background.parentNode.removeChild(lineView.background); lineView.background = null; }
-  } else if (cls) {
-    var wrap = ensureLineWrapped(lineView);
-    lineView.background = wrap.insertBefore(elt("div", null, cls), wrap.firstChild);
-    cm.display.input.setUneditable(lineView.background);
-  }
-}
-
-// Wrapper around buildLineContent which will reuse the structure
-// in display.externalMeasured when possible.
-function getLineContent(cm, lineView) {
-  var ext = cm.display.externalMeasured;
-  if (ext && ext.line == lineView.line) {
-    cm.display.externalMeasured = null;
-    lineView.measure = ext.measure;
-    return ext.built
-  }
-  return buildLineContent(cm, lineView)
-}
-
-// Redraw the line's text. Interacts with the background and text
-// classes because the mode may output tokens that influence these
-// classes.
-function updateLineText(cm, lineView) {
-  var cls = lineView.text.className;
-  var built = getLineContent(cm, lineView);
-  if (lineView.text == lineView.node) { lineView.node = built.pre; }
-  lineView.text.parentNode.replaceChild(built.pre, lineView.text);
-  lineView.text = built.pre;
-  if (built.bgClass != lineView.bgClass || built.textClass != lineView.textClass) {
-    lineView.bgClass = built.bgClass;
-    lineView.textClass = built.textClass;
-    updateLineClasses(cm, lineView);
-  } else if (cls) {
-    lineView.text.className = cls;
-  }
-}
-
-function updateLineClasses(cm, lineView) {
-  updateLineBackground(cm, lineView);
-  if (lineView.line.wrapClass)
-    { ensureLineWrapped(lineView).className = lineView.line.wrapClass; }
-  else if (lineView.node != lineView.text)
-    { lineView.node.className = ""; }
-  var textClass = lineView.textClass ? lineView.textClass + " " + (lineView.line.textClass || "") : lineView.line.textClass;
-  lineView.text.className = textClass || "";
-}
-
-function updateLineGutter(cm, lineView, lineN, dims) {
-  if (lineView.gutter) {
-    lineView.node.removeChild(lineView.gutter);
-    lineView.gutter = null;
-  }
-  if (lineView.gutterBackground) {
-    lineView.node.removeChild(lineView.gutterBackground);
-    lineView.gutterBackground = null;
-  }
-  if (lineView.line.gutterClass) {
-    var wrap = ensureLineWrapped(lineView);
-    lineView.gutterBackground = elt("div", null, "CodeMirror-gutter-background " + lineView.line.gutterClass,
-                                    ("left: " + (cm.options.fixedGutter ? dims.fixedPos : -dims.gutterTotalWidth) + "px; width: " + (dims.gutterTotalWidth) + "px"));
-    cm.display.input.setUneditable(lineView.gutterBackground);
-    wrap.insertBefore(lineView.gutterBackground, lineView.text);
-  }
-  var markers = lineView.line.gutterMarkers;
-  if (cm.options.lineNumbers || markers) {
-    var wrap$1 = ensureLineWrapped(lineView);
-    var gutterWrap = lineView.gutter = elt("div", null, "CodeMirror-gutter-wrapper", ("left: " + (cm.options.fixedGutter ? dims.fixedPos : -dims.gutterTotalWidth) + "px"));
-    cm.display.input.setUneditable(gutterWrap);
-    wrap$1.insertBefore(gutterWrap, lineView.text);
-    if (lineView.line.gutterClass)
-      { gutterWrap.className += " " + lineView.line.gutterClass; }
-    if (cm.options.lineNumbers && (!markers || !markers["CodeMirror-linenumbers"]))
-      { lineView.lineNumber = gutterWrap.appendChild(
-        elt("div", lineNumberFor(cm.options, lineN),
-            "CodeMirror-linenumber CodeMirror-gutter-elt",
-            ("left: " + (dims.gutterLeft["CodeMirror-linenumbers"]) + "px; width: " + (cm.display.lineNumInnerWidth) + "px"))); }
-    if (markers) { for (var k = 0; k < cm.options.gutters.length; ++k) {
-      var id = cm.options.gutters[k], found = markers.hasOwnProperty(id) && markers[id];
-      if (found)
-        { gutterWrap.appendChild(elt("div", [found], "CodeMirror-gutter-elt",
-                                   ("left: " + (dims.gutterLeft[id]) + "px; width: " + (dims.gutterWidth[id]) + "px"))); }
-    } }
-  }
-}
-
-function updateLineWidgets(cm, lineView, dims) {
-  if (lineView.alignable) { lineView.alignable = null; }
-  for (var node = lineView.node.firstChild, next = (void 0); node; node = next) {
-    next = node.nextSibling;
-    if (node.className == "CodeMirror-linewidget")
-      { lineView.node.removeChild(node); }
-  }
-  insertLineWidgets(cm, lineView, dims);
-}
-
-// Build a line's DOM representation from scratch
-function buildLineElement(cm, lineView, lineN, dims) {
-  var built = getLineContent(cm, lineView);
-  lineView.text = lineView.node = built.pre;
-  if (built.bgClass) { lineView.bgClass = built.bgClass; }
-  if (built.textClass) { lineView.textClass = built.textClass; }
-
-  updateLineClasses(cm, lineView);
-  updateLineGutter(cm, lineView, lineN, dims);
-  insertLineWidgets(cm, lineView, dims);
-  return lineView.node
-}
-
-// A lineView may contain multiple logical lines (when merged by
-// collapsed spans). The widgets for all of them need to be drawn.
-function insertLineWidgets(cm, lineView, dims) {
-  insertLineWidgetsFor(cm, lineView.line, lineView, dims, true);
-  if (lineView.rest) { for (var i = 0; i < lineView.rest.length; i++)
-    { insertLineWidgetsFor(cm, lineView.rest[i], lineView, dims, false); } }
-}
-
-function insertLineWidgetsFor(cm, line, lineView, dims, allowAbove) {
-  if (!line.widgets) { return }
-  var wrap = ensureLineWrapped(lineView);
-  for (var i = 0, ws = line.widgets; i < ws.length; ++i) {
-    var widget = ws[i], node = elt("div", [widget.node], "CodeMirror-linewidget");
-    if (!widget.handleMouseEvents) { node.setAttribute("cm-ignore-events", "true"); }
-    positionLineWidget(widget, node, lineView, dims);
-    cm.display.input.setUneditable(node);
-    if (allowAbove && widget.above)
-      { wrap.insertBefore(node, lineView.gutter || lineView.text); }
-    else
-      { wrap.appendChild(node); }
-    signalLater(widget, "redraw");
-  }
-}
-
-function positionLineWidget(widget, node, lineView, dims) {
-  if (widget.noHScroll) {
-    (lineView.alignable || (lineView.alignable = [])).push(node);
-    var width = dims.wrapperWidth;
-    node.style.left = dims.fixedPos + "px";
-    if (!widget.coverGutter) {
-      width -= dims.gutterTotalWidth;
-      node.style.paddingLeft = dims.gutterTotalWidth + "px";
-    }
-    node.style.width = width + "px";
-  }
-  if (widget.coverGutter) {
-    node.style.zIndex = 5;
-    node.style.position = "relative";
-    if (!widget.noHScroll) { node.style.marginLeft = -dims.gutterTotalWidth + "px"; }
-  }
-}
-
-function widgetHeight(widget) {
-  if (widget.height != null) { return widget.height }
-  var cm = widget.doc.cm;
-  if (!cm) { return 0 }
-  if (!contains(document.body, widget.node)) {
-    var parentStyle = "position: relative;";
-    if (widget.coverGutter)
-      { parentStyle += "margin-left: -" + cm.display.gutters.offsetWidth + "px;"; }
-    if (widget.noHScroll)
-      { parentStyle += "width: " + cm.display.wrapper.clientWidth + "px;"; }
-    removeChildrenAndAdd(cm.display.measure, elt("div", [widget.node], null, parentStyle));
-  }
-  return widget.height = widget.node.parentNode.offsetHeight
-}
-
-// Return true when the given mouse event happened in a widget
-function eventInWidget(display, e) {
-  for (var n = e_target(e); n != display.wrapper; n = n.parentNode) {
-    if (!n || (n.nodeType == 1 && n.getAttribute("cm-ignore-events") == "true") ||
-        (n.parentNode == display.sizer && n != display.mover))
-      { return true }
-  }
-}
-
-// POSITION MEASUREMENT
-
-function paddingTop(display) {return display.lineSpace.offsetTop}
-function paddingVert(display) {return display.mover.offsetHeight - display.lineSpace.offsetHeight}
-function paddingH(display) {
-  if (display.cachedPaddingH) { return display.cachedPaddingH }
-  var e = removeChildrenAndAdd(display.measure, elt("pre", "x"));
-  var style = window.getComputedStyle ? window.getComputedStyle(e) : e.currentStyle;
-  var data = {left: parseInt(style.paddingLeft), right: parseInt(style.paddingRight)};
-  if (!isNaN(data.left) && !isNaN(data.right)) { display.cachedPaddingH = data; }
-  return data
-}
-
-function scrollGap(cm) { return scrollerGap - cm.display.nativeBarWidth }
-function displayWidth(cm) {
-  return cm.display.scroller.clientWidth - scrollGap(cm) - cm.display.barWidth
-}
-function displayHeight(cm) {
-  return cm.display.scroller.clientHeight - scrollGap(cm) - cm.display.barHeight
-}
-
-// Ensure the lineView.wrapping.heights array is populated. This is
-// an array of bottom offsets for the lines that make up a drawn
-// line. When lineWrapping is on, there might be more than one
-// height.
-function ensureLineHeights(cm, lineView, rect) {
-  var wrapping = cm.options.lineWrapping;
-  var curWidth = wrapping && displayWidth(cm);
-  if (!lineView.measure.heights || wrapping && lineView.measure.width != curWidth) {
-    var heights = lineView.measure.heights = [];
-    if (wrapping) {
-      lineView.measure.width = curWidth;
-      var rects = lineView.text.firstChild.getClientRects();
-      for (var i = 0; i < rects.length - 1; i++) {
-        var cur = rects[i], next = rects[i + 1];
-        if (Math.abs(cur.bottom - next.bottom) > 2)
-          { heights.push((cur.bottom + next.top) / 2 - rect.top); }
-      }
-    }
-    heights.push(rect.bottom - rect.top);
-  }
-}
-
-// Find a line map (mapping character offsets to text nodes) and a
-// measurement cache for the given line number. (A line view might
-// contain multiple lines when collapsed ranges are present.)
-function mapFromLineView(lineView, line, lineN) {
-  if (lineView.line == line)
-    { return {map: lineView.measure.map, cache: lineView.measure.cache} }
-  for (var i = 0; i < lineView.rest.length; i++)
-    { if (lineView.rest[i] == line)
-      { return {map: lineView.measure.maps[i], cache: lineView.measure.caches[i]} } }
-  for (var i$1 = 0; i$1 < lineView.rest.length; i$1++)
-    { if (lineNo(lineView.rest[i$1]) > lineN)
-      { return {map: lineView.measure.maps[i$1], cache: lineView.measure.caches[i$1], before: true} } }
-}
-
-// Render a line into the hidden node display.externalMeasured. Used
-// when measurement is needed for a line that's not in the viewport.
-function updateExternalMeasurement(cm, line) {
-  line = visualLine(line);
-  var lineN = lineNo(line);
-  var view = cm.display.externalMeasured = new LineView(cm.doc, line, lineN);
-  view.lineN = lineN;
-  var built = view.built = buildLineContent(cm, view);
-  view.text = built.pre;
-  removeChildrenAndAdd(cm.display.lineMeasure, built.pre);
-  return view
-}
-
-// Get a {top, bottom, left, right} box (in line-local coordinates)
-// for a given character.
-function measureChar(cm, line, ch, bias) {
-  return measureCharPrepared(cm, prepareMeasureForLine(cm, line), ch, bias)
-}
-
-// Find a line view that corresponds to the given line number.
-function findViewForLine(cm, lineN) {
-  if (lineN >= cm.display.viewFrom && lineN < cm.display.viewTo)
-    { return cm.display.view[findViewIndex(cm, lineN)] }
-  var ext = cm.display.externalMeasured;
-  if (ext && lineN >= ext.lineN && lineN < ext.lineN + ext.size)
-    { return ext }
-}
-
-// Measurement can be split in two steps, the set-up work that
-// applies to the whole line, and the measurement of the actual
-// character. Functions like coordsChar, that need to do a lot of
-// measurements in a row, can thus ensure that the set-up work is
-// only done once.
-function prepareMeasureForLine(cm, line) {
-  var lineN = lineNo(line);
-  var view = findViewForLine(cm, lineN);
-  if (view && !view.text) {
-    view = null;
-  } else if (view && view.changes) {
-    updateLineForChanges(cm, view, lineN, getDimensions(cm));
-    cm.curOp.forceUpdate = true;
-  }
-  if (!view)
-    { view = updateExternalMeasurement(cm, line); }
-
-  var info = mapFromLineView(view, line, lineN);
-  return {
-    line: line, view: view, rect: null,
-    map: info.map, cache: info.cache, before: info.before,
-    hasHeights: false
-  }
-}
-
-// Given a prepared measurement object, measures the position of an
-// actual character (or fetches it from the cache).
-function measureCharPrepared(cm, prepared, ch, bias, varHeight) {
-  if (prepared.before) { ch = -1; }
-  var key = ch + (bias || ""), found;
-  if (prepared.cache.hasOwnProperty(key)) {
-    found = prepared.cache[key];
-  } else {
-    if (!prepared.rect)
-      { prepared.rect = prepared.view.text.getBoundingClientRect(); }
-    if (!prepared.hasHeights) {
-      ensureLineHeights(cm, prepared.view, prepared.rect);
-      prepared.hasHeights = true;
-    }
-    found = measureCharInner(cm, prepared, ch, bias);
-    if (!found.bogus) { prepared.cache[key] = found; }
-  }
-  return {left: found.left, right: found.right,
-          top: varHeight ? found.rtop : found.top,
-          bottom: varHeight ? found.rbottom : found.bottom}
-}
-
-var nullRect = {left: 0, right: 0, top: 0, bottom: 0};
-
-function nodeAndOffsetInLineMap(map$$1, ch, bias) {
-  var node, start, end, collapse, mStart, mEnd;
-  // First, search the line map for the text node corresponding to,
-  // or closest to, the target character.
-  for (var i = 0; i < map$$1.length; i += 3) {
-    mStart = map$$1[i];
-    mEnd = map$$1[i + 1];
-    if (ch < mStart) {
-      start = 0; end = 1;
-      collapse = "left";
-    } else if (ch < mEnd) {
-      start = ch - mStart;
-      end = start + 1;
-    } else if (i == map$$1.length - 3 || ch == mEnd && map$$1[i + 3] > ch) {
-      end = mEnd - mStart;
-      start = end - 1;
-      if (ch >= mEnd) { collapse = "right"; }
-    }
-    if (start != null) {
-      node = map$$1[i + 2];
-      if (mStart == mEnd && bias == (node.insertLeft ? "left" : "right"))
-        { collapse = bias; }
-      if (bias == "left" && start == 0)
-        { while (i && map$$1[i - 2] == map$$1[i - 3] && map$$1[i - 1].insertLeft) {
-          node = map$$1[(i -= 3) + 2];
-          collapse = "left";
-        } }
-      if (bias == "right" && start == mEnd - mStart)
-        { while (i < map$$1.length - 3 && map$$1[i + 3] == map$$1[i + 4] && !map$$1[i + 5].insertLeft) {
-          node = map$$1[(i += 3) + 2];
-          collapse = "right";
-        } }
-      break
-    }
-  }
-  return {node: node, start: start, end: end, collapse: collapse, coverStart: mStart, coverEnd: mEnd}
-}
-
-function getUsefulRect(rects, bias) {
-  var rect = nullRect;
-  if (bias == "left") { for (var i = 0; i < rects.length; i++) {
-    if ((rect = rects[i]).left != rect.right) { break }
-  } } else { for (var i$1 = rects.length - 1; i$1 >= 0; i$1--) {
-    if ((rect = rects[i$1]).left != rect.right) { break }
-  } }
-  return rect
-}
-
-function measureCharInner(cm, prepared, ch, bias) {
-  var place = nodeAndOffsetInLineMap(prepared.map, ch, bias);
-  var node = place.node, start = place.start, end = place.end, collapse = place.collapse;
-
-  var rect;
-  if (node.nodeType == 3) { // If it is a text node, use a range to retrieve the coordinates.
-    for (var i$1 = 0; i$1 < 4; i$1++) { // Retry a maximum of 4 times when nonsense rectangles are returned
-      while (start && isExtendingChar(prepared.line.text.charAt(place.coverStart + start))) { --start; }
-      while (place.coverStart + end < place.coverEnd && isExtendingChar(prepared.line.text.charAt(place.coverStart + end))) { ++end; }
-      if (ie && ie_version < 9 && start == 0 && end == place.coverEnd - place.coverStart)
-        { rect = node.parentNode.getBoundingClientRect(); }
-      else
-        { rect = getUsefulRect(range(node, start, end).getClientRects(), bias); }
-      if (rect.left || rect.right || start == 0) { break }
-      end = start;
-      start = start - 1;
-      collapse = "right";
-    }
-    if (ie && ie_version < 11) { rect = maybeUpdateRectForZooming(cm.display.measure, rect); }
-  } else { // If it is a widget, simply get the box for the whole widget.
-    if (start > 0) { collapse = bias = "right"; }
-    var rects;
-    if (cm.options.lineWrapping && (rects = node.getClientRects()).length > 1)
-      { rect = rects[bias == "right" ? rects.length - 1 : 0]; }
-    else
-      { rect = node.getBoundingClientRect(); }
-  }
-  if (ie && ie_version < 9 && !start && (!rect || !rect.left && !rect.right)) {
-    var rSpan = node.parentNode.getClientRects()[0];
-    if (rSpan)
-      { rect = {left: rSpan.left, right: rSpan.left + charWidth(cm.display), top: rSpan.top, bottom: rSpan.bottom}; }
-    else
-      { rect = nullRect; }
-  }
-
-  var rtop = rect.top - prepared.rect.top, rbot = rect.bottom - prepared.rect.top;
-  var mid = (rtop + rbot) / 2;
-  var heights = prepared.view.measure.heights;
-  var i = 0;
-  for (; i < heights.length - 1; i++)
-    { if (mid < heights[i]) { break } }
-  var top = i ? heights[i - 1] : 0, bot = heights[i];
-  var result = {left: (collapse == "right" ? rect.right : rect.left) - prepared.rect.left,
-                right: (collapse == "left" ? rect.left : rect.right) - prepared.rect.left,
-                top: top, bottom: bot};
-  if (!rect.left && !rect.right) { result.bogus = true; }
-  if (!cm.options.singleCursorHeightPerLine) { result.rtop = rtop; result.rbottom = rbot; }
-
-  return result
-}
-
-// Work around problem with bounding client rects on ranges being
-// returned incorrectly when zoomed on IE10 and below.
-function maybeUpdateRectForZooming(measure, rect) {
-  if (!window.screen || screen.logicalXDPI == null ||
-      screen.logicalXDPI == screen.deviceXDPI || !hasBadZoomedRects(measure))
-    { return rect }
-  var scaleX = screen.logicalXDPI / screen.deviceXDPI;
-  var scaleY = screen.logicalYDPI / screen.deviceYDPI;
-  return {left: rect.left * scaleX, right: rect.right * scaleX,
-          top: rect.top * scaleY, bottom: rect.bottom * scaleY}
-}
-
-function clearLineMeasurementCacheFor(lineView) {
-  if (lineView.measure) {
-    lineView.measure.cache = {};
-    lineView.measure.heights = null;
-    if (lineView.rest) { for (var i = 0; i < lineView.rest.length; i++)
-      { lineView.measure.caches[i] = {}; } }
-  }
-}
-
-function clearLineMeasurementCache(cm) {
-  cm.display.externalMeasure = null;
-  removeChildren(cm.display.lineMeasure);
-  for (var i = 0; i < cm.display.view.length; i++)
-    { clearLineMeasurementCacheFor(cm.display.view[i]); }
-}
-
-function clearCaches(cm) {
-  clearLineMeasurementCache(cm);
-  cm.display.cachedCharWidth = cm.display.cachedTextHeight = cm.display.cachedPaddingH = null;
-  if (!cm.options.lineWrapping) { cm.display.maxLineChanged = true; }
-  cm.display.lineNumChars = null;
-}
-
-function pageScrollX() {
-  // Work around https://bugs.chromium.org/p/chromium/issues/detail?id=489206
-  // which causes page_Offset and bounding client rects to use
-  // different reference viewports and invalidate our calculations.
-  if (chrome && android) { return -(document.body.getBoundingClientRect().left - parseInt(getComputedStyle(document.body).marginLeft)) }
-  return window.pageXOffset || (document.documentElement || document.body).scrollLeft
-}
-function pageScrollY() {
-  if (chrome && android) { return -(document.body.getBoundingClientRect().top - parseInt(getComputedStyle(document.body).marginTop)) }
-  return window.pageYOffset || (document.documentElement || document.body).scrollTop
-}
-
-function widgetTopHeight(lineObj) {
-  var height = 0;
-  if (lineObj.widgets) { for (var i = 0; i < lineObj.widgets.length; ++i) { if (lineObj.widgets[i].above)
-    { height += widgetHeight(lineObj.widgets[i]); } } }
-  return height
-}
-
-// Converts a {top, bottom, left, right} box from line-local
-// coordinates into another coordinate system. Context may be one of
-// "line", "div" (display.lineDiv), "local"./null (editor), "window",
-// or "page".
-function intoCoordSystem(cm, lineObj, rect, context, includeWidgets) {
-  if (!includeWidgets) {
-    var height = widgetTopHeight(lineObj);
-    rect.top += height; rect.bottom += height;
-  }
-  if (context == "line") { return rect }
-  if (!context) { context = "local"; }
-  var yOff = heightAtLine(lineObj);
-  if (context == "local") { yOff += paddingTop(cm.display); }
-  else { yOff -= cm.display.viewOffset; }
-  if (context == "page" || context == "window") {
-    var lOff = cm.display.lineSpace.getBoundingClientRect();
-    yOff += lOff.top + (context == "window" ? 0 : pageScrollY());
-    var xOff = lOff.left + (context == "window" ? 0 : pageScrollX());
-    rect.left += xOff; rect.right += xOff;
-  }
-  rect.top += yOff; rect.bottom += yOff;
-  return rect
-}
-
-// Coverts a box from "div" coords to another coordinate system.
-// Context may be "window", "page", "div", or "local"./null.
-function fromCoordSystem(cm, coords, context) {
-  if (context == "div") { return coords }
-  var left = coords.left, top = coords.top;
-  // First move into "page" coordinate system
-  if (context == "page") {
-    left -= pageScrollX();
-    top -= pageScrollY();
-  } else if (context == "local" || !context) {
-    var localBox = cm.display.sizer.getBoundingClientRect();
-    left += localBox.left;
-    top += localBox.top;
-  }
-
-  var lineSpaceBox = cm.display.lineSpace.getBoundingClientRect();
-  return {left: left - lineSpaceBox.left, top: top - lineSpaceBox.top}
-}
-
-function charCoords(cm, pos, context, lineObj, bias) {
-  if (!lineObj) { lineObj = getLine(cm.doc, pos.line); }
-  return intoCoordSystem(cm, lineObj, measureChar(cm, lineObj, pos.ch, bias), context)
-}
-
-// Returns a box for a given cursor position, which may have an
-// 'other' property containing the position of the secondary cursor
-// on a bidi boundary.
-// A cursor Pos(line, char, "before") is on the same visual line as `char - 1`
-// and after `char - 1` in writing order of `char - 1`
-// A cursor Pos(line, char, "after") is on the same visual line as `char`
-// and before `char` in writing order of `char`
-// Examples (upper-case letters are RTL, lower-case are LTR):
-//     Pos(0, 1, ...)
-//     before   after
-// ab     a|b     a|b
-// aB     a|B     aB|
-// Ab     |Ab     A|b
-// AB     B|A     B|A
-// Every position after the last character on a line is considered to stick
-// to the last character on the line.
-function cursorCoords(cm, pos, context, lineObj, preparedMeasure, varHeight) {
-  lineObj = lineObj || getLine(cm.doc, pos.line);
-  if (!preparedMeasure) { preparedMeasure = prepareMeasureForLine(cm, lineObj); }
-  function get(ch, right) {
-    var m = measureCharPrepared(cm, preparedMeasure, ch, right ? "right" : "left", varHeight);
-    if (right) { m.left = m.right; } else { m.right = m.left; }
-    return intoCoordSystem(cm, lineObj, m, context)
-  }
-  var order = getOrder(lineObj, cm.doc.direction), ch = pos.ch, sticky = pos.sticky;
-  if (ch >= lineObj.text.length) {
-    ch = lineObj.text.length;
-    sticky = "before";
-  } else if (ch <= 0) {
-    ch = 0;
-    sticky = "after";
-  }
-  if (!order) { return get(sticky == "before" ? ch - 1 : ch, sticky == "before") }
-
-  function getBidi(ch, partPos, invert) {
-    var part = order[partPos], right = part.level == 1;
-    return get(invert ? ch - 1 : ch, right != invert)
-  }
-  var partPos = getBidiPartAt(order, ch, sticky);
-  var other = bidiOther;
-  var val = getBidi(ch, partPos, sticky == "before");
-  if (other != null) { val.other = getBidi(ch, other, sticky != "before"); }
-  return val
-}
-
-// Used to cheaply estimate the coordinates for a position. Used for
-// intermediate scroll updates.
-function estimateCoords(cm, pos) {
-  var left = 0;
-  pos = clipPos(cm.doc, pos);
-  if (!cm.options.lineWrapping) { left = charWidth(cm.display) * pos.ch; }
-  var lineObj = getLine(cm.doc, pos.line);
-  var top = heightAtLine(lineObj) + paddingTop(cm.display);
-  return {left: left, right: left, top: top, bottom: top + lineObj.height}
-}
-
-// Positions returned by coordsChar contain some extra information.
-// xRel is the relative x position of the input coordinates compared
-// to the found position (so xRel > 0 means the coordinates are to
-// the right of the character position, for example). When outside
-// is true, that means the coordinates lie outside the line's
-// vertical range.
-function PosWithInfo(line, ch, sticky, outside, xRel) {
-  var pos = Pos(line, ch, sticky);
-  pos.xRel = xRel;
-  if (outside) { pos.outside = true; }
-  return pos
-}
-
-// Compute the character position closest to the given coordinates.
-// Input must be lineSpace-local ("div" coordinate system).
-function coordsChar(cm, x, y) {
-  var doc = cm.doc;
-  y += cm.display.viewOffset;
-  if (y < 0) { return PosWithInfo(doc.first, 0, null, true, -1) }
-  var lineN = lineAtHeight(doc, y), last = doc.first + doc.size - 1;
-  if (lineN > last)
-    { return PosWithInfo(doc.first + doc.size - 1, getLine(doc, last).text.length, null, true, 1) }
-  if (x < 0) { x = 0; }
-
-  var lineObj = getLine(doc, lineN);
-  for (;;) {
-    var found = coordsCharInner(cm, lineObj, lineN, x, y);
-    var collapsed = collapsedSpanAround(lineObj, found.ch + (found.xRel > 0 ? 1 : 0));
-    if (!collapsed) { return found }
-    var rangeEnd = collapsed.find(1);
-    if (rangeEnd.line == lineN) { return rangeEnd }
-    lineObj = getLine(doc, lineN = rangeEnd.line);
-  }
-}
-
-function wrappedLineExtent(cm, lineObj, preparedMeasure, y) {
-  y -= widgetTopHeight(lineObj);
-  var end = lineObj.text.length;
-  var begin = findFirst(function (ch) { return measureCharPrepared(cm, preparedMeasure, ch - 1).bottom <= y; }, end, 0);
-  end = findFirst(function (ch) { return measureCharPrepared(cm, preparedMeasure, ch).top > y; }, begin, end);
-  return {begin: begin, end: end}
-}
-
-function wrappedLineExtentChar(cm, lineObj, preparedMeasure, target) {
-  if (!preparedMeasure) { preparedMeasure = prepareMeasureForLine(cm, lineObj); }
-  var targetTop = intoCoordSystem(cm, lineObj, measureCharPrepared(cm, preparedMeasure, target), "line").top;
-  return wrappedLineExtent(cm, lineObj, preparedMeasure, targetTop)
-}
-
-// Returns true if the given side of a box is after the given
-// coordinates, in top-to-bottom, left-to-right order.
-function boxIsAfter(box, x, y, left) {
-  return box.bottom <= y ? false : box.top > y ? true : (left ? box.left : box.right) > x
-}
-
-function coordsCharInner(cm, lineObj, lineNo$$1, x, y) {
-  // Move y into line-local coordinate space
-  y -= heightAtLine(lineObj);
-  var preparedMeasure = prepareMeasureForLine(cm, lineObj);
-  // When directly calling `measureCharPrepared`, we have to adjust
-  // for the widgets at this line.
-  var widgetHeight$$1 = widgetTopHeight(lineObj);
-  var begin = 0, end = lineObj.text.length, ltr = true;
-
-  var order = getOrder(lineObj, cm.doc.direction);
-  // If the line isn't plain left-to-right text, first figure out
-  // which bidi section the coordinates fall into.
-  if (order) {
-    var part = (cm.options.lineWrapping ? coordsBidiPartWrapped : coordsBidiPart)
-                 (cm, lineObj, lineNo$$1, preparedMeasure, order, x, y);
-    ltr = part.level != 1;
-    // The awkward -1 offsets are needed because findFirst (called
-    // on these below) will treat its first bound as inclusive,
-    // second as exclusive, but we want to actually address the
-    // characters in the part's range
-    begin = ltr ? part.from : part.to - 1;
-    end = ltr ? part.to : part.from - 1;
-  }
-
-  // A binary search to find the first character whose bounding box
-  // starts after the coordinates. If we run across any whose box wrap
-  // the coordinates, store that.
-  var chAround = null, boxAround = null;
-  var ch = findFirst(function (ch) {
-    var box = measureCharPrepared(cm, preparedMeasure, ch);
-    box.top += widgetHeight$$1; box.bottom += widgetHeight$$1;
-    if (!boxIsAfter(box, x, y, false)) { return false }
-    if (box.top <= y && box.left <= x) {
-      chAround = ch;
-      boxAround = box;
-    }
-    return true
-  }, begin, end);
-
-  var baseX, sticky, outside = false;
-  // If a box around the coordinates was found, use that
-  if (boxAround) {
-    // Distinguish coordinates nearer to the left or right side of the box
-    var atLeft = x - boxAround.left < boxAround.right - x, atStart = atLeft == ltr;
-    ch = chAround + (atStart ? 0 : 1);
-    sticky = atStart ? "after" : "before";
-    baseX = atLeft ? boxAround.left : boxAround.right;
-  } else {
-    // (Adjust for extended bound, if necessary.)
-    if (!ltr && (ch == end || ch == begin)) { ch++; }
-    // To determine which side to associate with, get the box to the
-    // left of the character and compare it's vertical position to the
-    // coordinates
-    sticky = ch == 0 ? "after" : ch == lineObj.text.length ? "before" :
-      (measureCharPrepared(cm, preparedMeasure, ch - (ltr ? 1 : 0)).bottom + widgetHeight$$1 <= y) == ltr ?
-      "after" : "before";
-    // Now get accurate coordinates for this place, in order to get a
-    // base X position
-    var coords = cursorCoords(cm, Pos(lineNo$$1, ch, sticky), "line", lineObj, preparedMeasure);
-    baseX = coords.left;
-    outside = y < coords.top || y >= coords.bottom;
-  }
-
-  ch = skipExtendingChars(lineObj.text, ch, 1);
-  return PosWithInfo(lineNo$$1, ch, sticky, outside, x - baseX)
-}
-
-function coordsBidiPart(cm, lineObj, lineNo$$1, preparedMeasure, order, x, y) {
-  // Bidi parts are sorted left-to-right, and in a non-line-wrapping
-  // situation, we can take this ordering to correspond to the visual
-  // ordering. This finds the first part whose end is after the given
-  // coordinates.
-  var index = findFirst(function (i) {
-    var part = order[i], ltr = part.level != 1;
-    return boxIsAfter(cursorCoords(cm, Pos(lineNo$$1, ltr ? part.to : part.from, ltr ? "before" : "after"),
-                                   "line", lineObj, preparedMeasure), x, y, true)
-  }, 0, order.length - 1);
-  var part = order[index];
-  // If this isn't the first part, the part's start is also after
-  // the coordinates, and the coordinates aren't on the same line as
-  // that start, move one part back.
-  if (index > 0) {
-    var ltr = part.level != 1;
-    var start = cursorCoords(cm, Pos(lineNo$$1, ltr ? part.from : part.to, ltr ? "after" : "before"),
-                             "line", lineObj, preparedMeasure);
-    if (boxIsAfter(start, x, y, true) && start.top > y)
-      { part = order[index - 1]; }
-  }
-  return part
-}
-
-function coordsBidiPartWrapped(cm, lineObj, _lineNo, preparedMeasure, order, x, y) {
-  // In a wrapped line, rtl text on wrapping boundaries can do things
-  // that don't correspond to the ordering in our `order` array at
-  // all, so a binary search doesn't work, and we want to return a
-  // part that only spans one line so that the binary search in
-  // coordsCharInner is safe. As such, we first find the extent of the
-  // wrapped line, and then do a flat search in which we discard any
-  // spans that aren't on the line.
-  var ref = wrappedLineExtent(cm, lineObj, preparedMeasure, y);
-  var begin = ref.begin;
-  var end = ref.end;
-  if (/\s/.test(lineObj.text.charAt(end - 1))) { end--; }
-  var part = null, closestDist = null;
-  for (var i = 0; i < order.length; i++) {
-    var p = order[i];
-    if (p.from >= end || p.to <= begin) { continue }
-    var ltr = p.level != 1;
-    var endX = measureCharPrepared(cm, preparedMeasure, ltr ? Math.min(end, p.to) - 1 : Math.max(begin, p.from)).right;
-    // Weigh against spans ending before this, so that they are only
-    // picked if nothing ends after
-    var dist = endX < x ? x - endX + 1e9 : endX - x;
-    if (!part || closestDist > dist) {
-      part = p;
-      closestDist = dist;
-    }
-  }
-  if (!part) { part = order[order.length - 1]; }
-  // Clip the part to the wrapped line.
-  if (part.from < begin) { part = {from: begin, to: part.to, level: part.level}; }
-  if (part.to > end) { part = {from: part.from, to: end, level: part.level}; }
-  return part
-}
-
-var measureText;
-// Compute the default text height.
-function textHeight(display) {
-  if (display.cachedTextHeight != null) { return display.cachedTextHeight }
-  if (measureText == null) {
-    measureText = elt("pre");
-    // Measure a bunch of lines, for browsers that compute
-    // fractional heights.
-    for (var i = 0; i < 49; ++i) {
-      measureText.appendChild(document.createTextNode("x"));
-      measureText.appendChild(elt("br"));
-    }
-    measureText.appendChild(document.createTextNode("x"));
-  }
-  removeChildrenAndAdd(display.measure, measureText);
-  var height = measureText.offsetHeight / 50;
-  if (height > 3) { display.cachedTextHeight = height; }
-  removeChildren(display.measure);
-  return height || 1
-}
-
-// Compute the default character width.
-function charWidth(display) {
-  if (display.cachedCharWidth != null) { return display.cachedCharWidth }
-  var anchor = elt("span", "xxxxxxxxxx");
-  var pre = elt("pre", [anchor]);
-  removeChildrenAndAdd(display.measure, pre);
-  var rect = anchor.getBoundingClientRect(), width = (rect.right - rect.left) / 10;
-  if (width > 2) { display.cachedCharWidth = width; }
-  return width || 10
-}
-
-// Do a bulk-read of the DOM positions and sizes needed to draw the
-// view, so that we don't interleave reading and writing to the DOM.
-function getDimensions(cm) {
-  var d = cm.display, left = {}, width = {};
-  var gutterLeft = d.gutters.clientLeft;
-  for (var n = d.gutters.firstChild, i = 0; n; n = n.nextSibling, ++i) {
-    left[cm.options.gutters[i]] = n.offsetLeft + n.clientLeft + gutterLeft;
-    width[cm.options.gutters[i]] = n.clientWidth;
-  }
-  return {fixedPos: compensateForHScroll(d),
-          gutterTotalWidth: d.gutters.offsetWidth,
-          gutterLeft: left,
-          gutterWidth: width,
-          wrapperWidth: d.wrapper.clientWidth}
-}
-
-// Computes display.scroller.scrollLeft + display.gutters.offsetWidth,
-// but using getBoundingClientRect to get a sub-pixel-accurate
-// result.
-function compensateForHScroll(display) {
-  return display.scroller.getBoundingClientRect().left - display.sizer.getBoundingClientRect().left
-}
-
-// Returns a function that estimates the height of a line, to use as
-// first approximation until the line becomes visible (and is thus
-// properly measurable).
-function estimateHeight(cm) {
-  var th = textHeight(cm.display), wrapping = cm.options.lineWrapping;
-  var perLine = wrapping && Math.max(5, cm.display.scroller.clientWidth / charWidth(cm.display) - 3);
-  return function (line) {
-    if (lineIsHidden(cm.doc, line)) { return 0 }
-
-    var widgetsHeight = 0;
-    if (line.widgets) { for (var i = 0; i < line.widgets.length; i++) {
-      if (line.widgets[i].height) { widgetsHeight += line.widgets[i].height; }
-    } }
-
-    if (wrapping)
-      { return widgetsHeight + (Math.ceil(line.text.length / perLine) || 1) * th }
-    else
-      { return widgetsHeight + th }
-  }
-}
-
-function estimateLineHeights(cm) {
-  var doc = cm.doc, est = estimateHeight(cm);
-  doc.iter(function (line) {
-    var estHeight = est(line);
-    if (estHeight != line.height) { updateLineHeight(line, estHeight); }
-  });
-}
-
-// Given a mouse event, find the corresponding position. If liberal
-// is false, it checks whether a gutter or scrollbar was clicked,
-// and returns null if it was. forRect is used by rectangular
-// selections, and tries to estimate a character position even for
-// coordinates beyond the right of the text.
-function posFromMouse(cm, e, liberal, forRect) {
-  var display = cm.display;
-  if (!liberal && e_target(e).getAttribute("cm-not-content") == "true") { return null }
-
-  var x, y, space = display.lineSpace.getBoundingClientRect();
-  // Fails unpredictably on IE[67] when mouse is dragged around quickly.
-  try { x = e.clientX - space.left; y = e.clientY - space.top; }
-  catch (e) { return null }
-  var coords = coordsChar(cm, x, y), line;
-  if (forRect && coords.xRel == 1 && (line = getLine(cm.doc, coords.line).text).length == coords.ch) {
-    var colDiff = countColumn(line, line.length, cm.options.tabSize) - line.length;
-    coords = Pos(coords.line, Math.max(0, Math.round((x - paddingH(cm.display).left) / charWidth(cm.display)) - colDiff));
-  }
-  return coords
-}
-
-// Find the view element corresponding to a given line. Return null
-// when the line isn't visible.
-function findViewIndex(cm, n) {
-  if (n >= cm.display.viewTo) { return null }
-  n -= cm.display.viewFrom;
-  if (n < 0) { return null }
-  var view = cm.display.view;
-  for (var i = 0; i < view.length; i++) {
-    n -= view[i].size;
-    if (n < 0) { return i }
-  }
-}
-
-function updateSelection(cm) {
-  cm.display.input.showSelection(cm.display.input.prepareSelection());
-}
-
-function prepareSelection(cm, primary) {
-  if ( primary === void 0 ) primary = true;
-
-  var doc = cm.doc, result = {};
-  var curFragment = result.cursors = document.createDocumentFragment();
-  var selFragment = result.selection = document.createDocumentFragment();
-
-  for (var i = 0; i < doc.sel.ranges.length; i++) {
-    if (!primary && i == doc.sel.primIndex) { continue }
-    var range$$1 = doc.sel.ranges[i];
-    if (range$$1.from().line >= cm.display.viewTo || range$$1.to().line < cm.display.viewFrom) { continue }
-    var collapsed = range$$1.empty();
-    if (collapsed || cm.options.showCursorWhenSelecting)
-      { drawSelectionCursor(cm, range$$1.head, curFragment); }
-    if (!collapsed)
-      { drawSelectionRange(cm, range$$1, selFragment); }
-  }
-  return result
-}
-
-// Draws a cursor for the given range
-function drawSelectionCursor(cm, head, output) {
-  var pos = cursorCoords(cm, head, "div", null, null, !cm.options.singleCursorHeightPerLine);
-
-  var cursor = output.appendChild(elt("div", "\u00a0", "CodeMirror-cursor"));
-  cursor.style.left = pos.left + "px";
-  cursor.style.top = pos.top + "px";
-  cursor.style.height = Math.max(0, pos.bottom - pos.top) * cm.options.cursorHeight + "px";
-
-  if (pos.other) {
-    // Secondary cursor, shown when on a 'jump' in bi-directional text
-    var otherCursor = output.appendChild(elt("div", "\u00a0", "CodeMirror-cursor CodeMirror-secondarycursor"));
-    otherCursor.style.display = "";
-    otherCursor.style.left = pos.other.left + "px";
-    otherCursor.style.top = pos.other.top + "px";
-    otherCursor.style.height = (pos.other.bottom - pos.other.top) * .85 + "px";
-  }
-}
-
-function cmpCoords(a, b) { return a.top - b.top || a.left - b.left }
-
-// Draws the given range as a highlighted selection
-function drawSelectionRange(cm, range$$1, output) {
-  var display = cm.display, doc = cm.doc;
-  var fragment = document.createDocumentFragment();
-  var padding = paddingH(cm.display), leftSide = padding.left;
-  var rightSide = Math.max(display.sizerWidth, displayWidth(cm) - display.sizer.offsetLeft) - padding.right;
-  var docLTR = doc.direction == "ltr";
-
-  function add(left, top, width, bottom) {
-    if (top < 0) { top = 0; }
-    top = Math.round(top);
-    bottom = Math.round(bottom);
-    fragment.appendChild(elt("div", null, "CodeMirror-selected", ("position: absolute; left: " + left + "px;\n                             top: " + top + "px; width: " + (width == null ? rightSide - left : width) + "px;\n                             height: " + (bottom - top) + "px")));
-  }
-
-  function drawForLine(line, fromArg, toArg) {
-    var lineObj = getLine(doc, line);
-    var lineLen = lineObj.text.length;
-    var start, end;
-    function coords(ch, bias) {
-      return charCoords(cm, Pos(line, ch), "div", lineObj, bias)
-    }
-
-    function wrapX(pos, dir, side) {
-      var extent = wrappedLineExtentChar(cm, lineObj, null, pos);
-      var prop = (dir == "ltr") == (side == "after") ? "left" : "right";
-      var ch = side == "after" ? extent.begin : extent.end - (/\s/.test(lineObj.text.charAt(extent.end - 1)) ? 2 : 1);
-      return coords(ch, prop)[prop]
-    }
-
-    var order = getOrder(lineObj, doc.direction);
-    iterateBidiSections(order, fromArg || 0, toArg == null ? lineLen : toArg, function (from, to, dir, i) {
-      var ltr = dir == "ltr";
-      var fromPos = coords(from, ltr ? "left" : "right");
-      var toPos = coords(to - 1, ltr ? "right" : "left");
-
-      var openStart = fromArg == null && from == 0, openEnd = toArg == null && to == lineLen;
-      var first = i == 0, last = !order || i == order.length - 1;
-      if (toPos.top - fromPos.top <= 3) { // Single line
-        var openLeft = (docLTR ? openStart : openEnd) && first;
-        var openRight = (docLTR ? openEnd : openStart) && last;
-        var left = openLeft ? leftSide : (ltr ? fromPos : toPos).left;
-        var right = openRight ? rightSide : (ltr ? toPos : fromPos).right;
-        add(left, fromPos.top, right - left, fromPos.bottom);
-      } else { // Multiple lines
-        var topLeft, topRight, botLeft, botRight;
-        if (ltr) {
-          topLeft = docLTR && openStart && first ? leftSide : fromPos.left;
-          topRight = docLTR ? rightSide : wrapX(from, dir, "before");
-          botLeft = docLTR ? leftSide : wrapX(to, dir, "after");
-          botRight = docLTR && openEnd && last ? rightSide : toPos.right;
-        } else {
-          topLeft = !docLTR ? leftSide : wrapX(from, dir, "before");
-          topRight = !docLTR && openStart && first ? rightSide : fromPos.right;
-          botLeft = !docLTR && openEnd && last ? leftSide : toPos.left;
-          botRight = !docLTR ? rightSide : wrapX(to, dir, "after");
-        }
-        add(topLeft, fromPos.top, topRight - topLeft, fromPos.bottom);
-        if (fromPos.bottom < toPos.top) { add(leftSide, fromPos.bottom, null, toPos.top); }
-        add(botLeft, toPos.top, botRight - botLeft, toPos.bottom);
-      }
-
-      if (!start || cmpCoords(fromPos, start) < 0) { start = fromPos; }
-      if (cmpCoords(toPos, start) < 0) { start = toPos; }
-      if (!end || cmpCoords(fromPos, end) < 0) { end = fromPos; }
-      if (cmpCoords(toPos, end) < 0) { end = toPos; }
-    });
-    return {start: start, end: end}
-  }
-
-  var sFrom = range$$1.from(), sTo = range$$1.to();
-  if (sFrom.line == sTo.line) {
-    drawForLine(sFrom.line, sFrom.ch, sTo.ch);
-  } else {
-    var fromLine = getLine(doc, sFrom.line), toLine = getLine(doc, sTo.line);
-    var singleVLine = visualLine(fromLine) == visualLine(toLine);
-    var leftEnd = drawForLine(sFrom.line, sFrom.ch, singleVLine ? fromLine.text.length + 1 : null).end;
-    var rightStart = drawForLine(sTo.line, singleVLine ? 0 : null, sTo.ch).start;
-    if (singleVLine) {
-      if (leftEnd.top < rightStart.top - 2) {
-        add(leftEnd.right, leftEnd.top, null, leftEnd.bottom);
-        add(leftSide, rightStart.top, rightStart.left, rightStart.bottom);
-      } else {
-        add(leftEnd.right, leftEnd.top, rightStart.left - leftEnd.right, leftEnd.bottom);
-      }
-    }
-    if (leftEnd.bottom < rightStart.top)
-      { add(leftSide, leftEnd.bottom, null, rightStart.top); }
-  }
-
-  output.appendChild(fragment);
-}
-
-// Cursor-blinking
-function restartBlink(cm) {
-  if (!cm.state.focused) { return }
-  var display = cm.display;
-  clearInterval(display.blinker);
-  var on = true;
-  display.cursorDiv.style.visibility = "";
-  if (cm.options.cursorBlinkRate > 0)
-    { display.blinker = setInterval(function () { return display.cursorDiv.style.visibility = (on = !on) ? "" : "hidden"; },
-      cm.options.cursorBlinkRate); }
-  else if (cm.options.cursorBlinkRate < 0)
-    { display.cursorDiv.style.visibility = "hidden"; }
-}
-
-function ensureFocus(cm) {
-  if (!cm.state.focused) { cm.display.input.focus(); onFocus(cm); }
-}
-
-function delayBlurEvent(cm) {
-  cm.state.delayingBlurEvent = true;
-  setTimeout(function () { if (cm.state.delayingBlurEvent) {
-    cm.state.delayingBlurEvent = false;
-    onBlur(cm);
-  } }, 100);
-}
-
-function onFocus(cm, e) {
-  if (cm.state.delayingBlurEvent) { cm.state.delayingBlurEvent = false; }
-
-  if (cm.options.readOnly == "nocursor") { return }
-  if (!cm.state.focused) {
-    signal(cm, "focus", cm, e);
-    cm.state.focused = true;
-    addClass(cm.display.wrapper, "CodeMirror-focused");
-    // This test prevents this from firing when a context
-    // menu is closed (since the input reset would kill the
-    // select-all detection hack)
-    if (!cm.curOp && cm.display.selForContextMenu != cm.doc.sel) {
-      cm.display.input.reset();
-      if (webkit) { setTimeout(function () { return cm.display.input.reset(true); }, 20); } // Issue #1730
-    }
-    cm.display.input.receivedFocus();
-  }
-  restartBlink(cm);
-}
-function onBlur(cm, e) {
-  if (cm.state.delayingBlurEvent) { return }
-
-  if (cm.state.focused) {
-    signal(cm, "blur", cm, e);
-    cm.state.focused = false;
-    rmClass(cm.display.wrapper, "CodeMirror-focused");
-  }
-  clearInterval(cm.display.blinker);
-  setTimeout(function () { if (!cm.state.focused) { cm.display.shift = false; } }, 150);
-}
-
-// Read the actual heights of the rendered lines, and update their
-// stored heights to match.
-function updateHeightsInViewport(cm) {
-  var display = cm.display;
-  var prevBottom = display.lineDiv.offsetTop;
-  for (var i = 0; i < display.view.length; i++) {
-    var cur = display.view[i], height = (void 0);
-    if (cur.hidden) { continue }
-    if (ie && ie_version < 8) {
-      var bot = cur.node.offsetTop + cur.node.offsetHeight;
-      height = bot - prevBottom;
-      prevBottom = bot;
-    } else {
-      var box = cur.node.getBoundingClientRect();
-      height = box.bottom - box.top;
-    }
-    var diff = cur.line.height - height;
-    if (height < 2) { height = textHeight(display); }
-    if (diff > .005 || diff < -.005) {
-      updateLineHeight(cur.line, height);
-      updateWidgetHeight(cur.line);
-      if (cur.rest) { for (var j = 0; j < cur.rest.length; j++)
-        { updateWidgetHeight(cur.rest[j]); } }
-    }
-  }
-}
-
-// Read and store the height of line widgets associated with the
-// given line.
-function updateWidgetHeight(line) {
-  if (line.widgets) { for (var i = 0; i < line.widgets.length; ++i) {
-    var w = line.widgets[i], parent = w.node.parentNode;
-    if (parent) { w.height = parent.offsetHeight; }
-  } }
-}
-
-// Compute the lines that are visible in a given viewport (defaults
-// the the current scroll position). viewport may contain top,
-// height, and ensure (see op.scrollToPos) properties.
-function visibleLines(display, doc, viewport) {
-  var top = viewport && viewport.top != null ? Math.max(0, viewport.top) : display.scroller.scrollTop;
-  top = Math.floor(top - paddingTop(display));
-  var bottom = viewport && viewport.bottom != null ? viewport.bottom : top + display.wrapper.clientHeight;
-
-  var from = lineAtHeight(doc, top), to = lineAtHeight(doc, bottom);
-  // Ensure is a {from: {line, ch}, to: {line, ch}} object, and
-  // forces those lines into the viewport (if possible).
-  if (viewport && viewport.ensure) {
-    var ensureFrom = viewport.ensure.from.line, ensureTo = viewport.ensure.to.line;
-    if (ensureFrom < from) {
-      from = ensureFrom;
-      to = lineAtHeight(doc, heightAtLine(getLine(doc, ensureFrom)) + display.wrapper.clientHeight);
-    } else if (Math.min(ensureTo, doc.lastLine()) >= to) {
-      from = lineAtHeight(doc, heightAtLine(getLine(doc, ensureTo)) - display.wrapper.clientHeight);
-      to = ensureTo;
-    }
-  }
-  return {from: from, to: Math.max(to, from + 1)}
-}
-
-// Re-align line numbers and gutter marks to compensate for
-// horizontal scrolling.
-function alignHorizontally(cm) {
-  var display = cm.display, view = display.view;
-  if (!display.alignWidgets && (!display.gutters.firstChild || !cm.options.fixedGutter)) { return }
-  var comp = compensateForHScroll(display) - display.scroller.scrollLeft + cm.doc.scrollLeft;
-  var gutterW = display.gutters.offsetWidth, left = comp + "px";
-  for (var i = 0; i < view.length; i++) { if (!view[i].hidden) {
-    if (cm.options.fixedGutter) {
-      if (view[i].gutter)
-        { view[i].gutter.style.left = left; }
-      if (view[i].gutterBackground)
-        { view[i].gutterBackground.style.left = left; }
-    }
-    var align = view[i].alignable;
-    if (align) { for (var j = 0; j < align.length; j++)
-      { align[j].style.left = left; } }
-  } }
-  if (cm.options.fixedGutter)
-    { display.gutters.style.left = (comp + gutterW) + "px"; }
-}
-
-// Used to ensure that the line number gutter is still the right
-// size for the current document size. Returns true when an update
-// is needed.
-function maybeUpdateLineNumberWidth(cm) {
-  if (!cm.options.lineNumbers) { return false }
-  var doc = cm.doc, last = lineNumberFor(cm.options, doc.first + doc.size - 1), display = cm.display;
-  if (last.length != display.lineNumChars) {
-    var test = display.measure.appendChild(elt("div", [elt("div", last)],
-                                               "CodeMirror-linenumber CodeMirror-gutter-elt"));
-    var innerW = test.firstChild.offsetWidth, padding = test.offsetWidth - innerW;
-    display.lineGutter.style.width = "";
-    display.lineNumInnerWidth = Math.max(innerW, display.lineGutter.offsetWidth - padding) + 1;
-    display.lineNumWidth = display.lineNumInnerWidth + padding;
-    display.lineNumChars = display.lineNumInnerWidth ? last.length : -1;
-    display.lineGutter.style.width = display.lineNumWidth + "px";
-    updateGutterSpace(cm);
-    return true
-  }
-  return false
-}
-
-// SCROLLING THINGS INTO VIEW
-
-// If an editor sits on the top or bottom of the window, partially
-// scrolled out of view, this ensures that the cursor is visible.
-function maybeScrollWindow(cm, rect) {
-  if (signalDOMEvent(cm, "scrollCursorIntoView")) { return }
-
-  var display = cm.display, box = display.sizer.getBoundingClientRect(), doScroll = null;
-  if (rect.top + box.top < 0) { doScroll = true; }
-  else if (rect.bottom + box.top > (window.innerHeight || document.documentElement.clientHeight)) { doScroll = false; }
-  if (doScroll != null && !phantom) {
-    var scrollNode = elt("div", "\u200b", null, ("position: absolute;\n                         top: " + (rect.top - display.viewOffset - paddingTop(cm.display)) + "px;\n                         height: " + (rect.bottom - rect.top + scrollGap(cm) + display.barHeight) + "px;\n                         left: " + (rect.left) + "px; width: " + (Math.max(2, rect.right - rect.left)) + "px;"));
-    cm.display.lineSpace.appendChild(scrollNode);
-    scrollNode.scrollIntoView(doScroll);
-    cm.display.lineSpace.removeChild(scrollNode);
-  }
-}
-
-// Scroll a given position into view (immediately), verifying that
-// it actually became visible (as line heights are accurately
-// measured, the position of something may 'drift' during drawing).
-function scrollPosIntoView(cm, pos, end, margin) {
-  if (margin == null) { margin = 0; }
-  var rect;
-  if (!cm.options.lineWrapping && pos == end) {
-    // Set pos and end to the cursor positions around the character pos sticks to
-    // If pos.sticky == "before", that is around pos.ch - 1, otherwise around pos.ch
-    // If pos == Pos(_, 0, "before"), pos and end are unchanged
-    pos = pos.ch ? Pos(pos.line, pos.sticky == "before" ? pos.ch - 1 : pos.ch, "after") : pos;
-    end = pos.sticky == "before" ? Pos(pos.line, pos.ch + 1, "before") : pos;
-  }
-  for (var limit = 0; limit < 5; limit++) {
-    var changed = false;
-    var coords = cursorCoords(cm, pos);
-    var endCoords = !end || end == pos ? coords : cursorCoords(cm, end);
-    rect = {left: Math.min(coords.left, endCoords.left),
-            top: Math.min(coords.top, endCoords.top) - margin,
-            right: Math.max(coords.left, endCoords.left),
-            bottom: Math.max(coords.bottom, endCoords.bottom) + margin};
-    var scrollPos = calculateScrollPos(cm, rect);
-    var startTop = cm.doc.scrollTop, startLeft = cm.doc.scrollLeft;
-    if (scrollPos.scrollTop != null) {
-      updateScrollTop(cm, scrollPos.scrollTop);
-      if (Math.abs(cm.doc.scrollTop - startTop) > 1) { changed = true; }
-    }
-    if (scrollPos.scrollLeft != null) {
-      setScrollLeft(cm, scrollPos.scrollLeft);
-      if (Math.abs(cm.doc.scrollLeft - startLeft) > 1) { changed = true; }
-    }
-    if (!changed) { break }
-  }
-  return rect
-}
-
-// Scroll a given set of coordinates into view (immediately).
-function scrollIntoView(cm, rect) {
-  var scrollPos = calculateScrollPos(cm, rect);
-  if (scrollPos.scrollTop != null) { updateScrollTop(cm, scrollPos.scrollTop); }
-  if (scrollPos.scrollLeft != null) { setScrollLeft(cm, scrollPos.scrollLeft); }
-}
-
-// Calculate a new scroll position needed to scroll the given
-// rectangle into view. Returns an object with scrollTop and
-// scrollLeft properties. When these are undefined, the
-// vertical/horizontal position does not need to be adjusted.
-function calculateScrollPos(cm, rect) {
-  var display = cm.display, snapMargin = textHeight(cm.display);
-  if (rect.top < 0) { rect.top = 0; }
-  var screentop = cm.curOp && cm.curOp.scrollTop != null ? cm.curOp.scrollTop : display.scroller.scrollTop;
-  var screen = displayHeight(cm), result = {};
-  if (rect.bottom - rect.top > screen) { rect.bottom = rect.top + screen; }
-  var docBottom = cm.doc.height + paddingVert(display);
-  var atTop = rect.top < snapMargin, atBottom = rect.bottom > docBottom - snapMargin;
-  if (rect.top < screentop) {
-    result.scrollTop = atTop ? 0 : rect.top;
-  } else if (rect.bottom > screentop + screen) {
-    var newTop = Math.min(rect.top, (atBottom ? docBottom : rect.bottom) - screen);
-    if (newTop != screentop) { result.scrollTop = newTop; }
-  }
-
-  var screenleft = cm.curOp && cm.curOp.scrollLeft != null ? cm.curOp.scrollLeft : display.scroller.scrollLeft;
-  var screenw = displayWidth(cm) - (cm.options.fixedGutter ? display.gutters.offsetWidth : 0);
-  var tooWide = rect.right - rect.left > screenw;
-  if (tooWide) { rect.right = rect.left + screenw; }
-  if (rect.left < 10)
-    { result.scrollLeft = 0; }
-  else if (rect.left < screenleft)
-    { result.scrollLeft = Math.max(0, rect.left - (tooWide ? 0 : 10)); }
-  else if (rect.right > screenw + screenleft - 3)
-    { result.scrollLeft = rect.right + (tooWide ? 0 : 10) - screenw; }
-  return result
-}
-
-// Store a relative adjustment to the scroll position in the current
-// operation (to be applied when the operation finishes).
-function addToScrollTop(cm, top) {
-  if (top == null) { return }
-  resolveScrollToPos(cm);
-  cm.curOp.scrollTop = (cm.curOp.scrollTop == null ? cm.doc.scrollTop : cm.curOp.scrollTop) + top;
-}
-
-// Make sure that at the end of the operation the current cursor is
-// shown.
-function ensureCursorVisible(cm) {
-  resolveScrollToPos(cm);
-  var cur = cm.getCursor();
-  cm.curOp.scrollToPos = {from: cur, to: cur, margin: cm.options.cursorScrollMargin};
-}
-
-function scrollToCoords(cm, x, y) {
-  if (x != null || y != null) { resolveScrollToPos(cm); }
-  if (x != null) { cm.curOp.scrollLeft = x; }
-  if (y != null) { cm.curOp.scrollTop = y; }
-}
-
-function scrollToRange(cm, range$$1) {
-  resolveScrollToPos(cm);
-  cm.curOp.scrollToPos = range$$1;
-}
-
-// When an operation has its scrollToPos property set, and another
-// scroll action is applied before the end of the operation, this
-// 'simulates' scrolling that position into view in a cheap way, so
-// that the effect of intermediate scroll commands is not ignored.
-function resolveScrollToPos(cm) {
-  var range$$1 = cm.curOp.scrollToPos;
-  if (range$$1) {
-    cm.curOp.scrollToPos = null;
-    var from = estimateCoords(cm, range$$1.from), to = estimateCoords(cm, range$$1.to);
-    scrollToCoordsRange(cm, from, to, range$$1.margin);
-  }
-}
-
-function scrollToCoordsRange(cm, from, to, margin) {
-  var sPos = calculateScrollPos(cm, {
-    left: Math.min(from.left, to.left),
-    top: Math.min(from.top, to.top) - margin,
-    right: Math.max(from.right, to.right),
-    bottom: Math.max(from.bottom, to.bottom) + margin
-  });
-  scrollToCoords(cm, sPos.scrollLeft, sPos.scrollTop);
-}
-
-// Sync the scrollable area and scrollbars, ensure the viewport
-// covers the visible area.
-function updateScrollTop(cm, val) {
-  if (Math.abs(cm.doc.scrollTop - val) < 2) { return }
-  if (!gecko) { updateDisplaySimple(cm, {top: val}); }
-  setScrollTop(cm, val, true);
-  if (gecko) { updateDisplaySimple(cm); }
-  startWorker(cm, 100);
-}
-
-function setScrollTop(cm, val, forceScroll) {
-  val = Math.min(cm.display.scroller.scrollHeight - cm.display.scroller.clientHeight, val);
-  if (cm.display.scroller.scrollTop == val && !forceScroll) { return }
-  cm.doc.scrollTop = val;
-  cm.display.scrollbars.setScrollTop(val);
-  if (cm.display.scroller.scrollTop != val) { cm.display.scroller.scrollTop = val; }
-}
-
-// Sync scroller and scrollbar, ensure the gutter elements are
-// aligned.
-function setScrollLeft(cm, val, isScroller, forceScroll) {
-  val = Math.min(val, cm.display.scroller.scrollWidth - cm.display.scroller.clientWidth);
-  if ((isScroller ? val == cm.doc.scrollLeft : Math.abs(cm.doc.scrollLeft - val) < 2) && !forceScroll) { return }
-  cm.doc.scrollLeft = val;
-  alignHorizontally(cm);
-  if (cm.display.scroller.scrollLeft != val) { cm.display.scroller.scrollLeft = val; }
-  cm.display.scrollbars.setScrollLeft(val);
-}
-
-// SCROLLBARS
-
-// Prepare DOM reads needed to update the scrollbars. Done in one
-// shot to minimize update/measure roundtrips.
-function measureForScrollbars(cm) {
-  var d = cm.display, gutterW = d.gutters.offsetWidth;
-  var docH = Math.round(cm.doc.height + paddingVert(cm.display));
-  return {
-    clientHeight: d.scroller.clientHeight,
-    viewHeight: d.wrapper.clientHeight,
-    scrollWidth: d.scroller.scrollWidth, clientWidth: d.scroller.clientWidth,
-    viewWidth: d.wrapper.clientWidth,
-    barLeft: cm.options.fixedGutter ? gutterW : 0,
-    docHeight: docH,
-    scrollHeight: docH + scrollGap(cm) + d.barHeight,
-    nativeBarWidth: d.nativeBarWidth,
-    gutterWidth: gutterW
-  }
-}
-
-var NativeScrollbars = function(place, scroll, cm) {
-  this.cm = cm;
-  var vert = this.vert = elt("div", [elt("div", null, null, "min-width: 1px")], "CodeMirror-vscrollbar");
-  var horiz = this.horiz = elt("div", [elt("div", null, null, "height: 100%; min-height: 1px")], "CodeMirror-hscrollbar");
-  vert.tabIndex = horiz.tabIndex = -1;
-  place(vert); place(horiz);
-
-  on(vert, "scroll", function () {
-    if (vert.clientHeight) { scroll(vert.scrollTop, "vertical"); }
-  });
-  on(horiz, "scroll", function () {
-    if (horiz.clientWidth) { scroll(horiz.scrollLeft, "horizontal"); }
-  });
-
-  this.checkedZeroWidth = false;
-  // Need to set a minimum width to see the scrollbar on IE7 (but must not set it on IE8).
-  if (ie && ie_version < 8) { this.horiz.style.minHeight = this.vert.style.minWidth = "18px"; }
-};
-
-NativeScrollbars.prototype.update = function (measure) {
-  var needsH = measure.scrollWidth > measure.clientWidth + 1;
-  var needsV = measure.scrollHeight > measure.clientHeight + 1;
-  var sWidth = measure.nativeBarWidth;
-
-  if (needsV) {
-    this.vert.style.display = "block";
-    this.vert.style.bottom = needsH ? sWidth + "px" : "0";
-    var totalHeight = measure.viewHeight - (needsH ? sWidth : 0);
-    // A bug in IE8 can cause this value to be negative, so guard it.
-    this.vert.firstChild.style.height =
-      Math.max(0, measure.scrollHeight - measure.clientHeight + totalHeight) + "px";
-  } else {
-    this.vert.style.display = "";
-    this.vert.firstChild.style.height = "0";
-  }
-
-  if (needsH) {
-    this.horiz.style.display = "block";
-    this.horiz.style.right = needsV ? sWidth + "px" : "0";
-    this.horiz.style.left = measure.barLeft + "px";
-    var totalWidth = measure.viewWidth - measure.barLeft - (needsV ? sWidth : 0);
-    this.horiz.firstChild.style.width =
-      Math.max(0, measure.scrollWidth - measure.clientWidth + totalWidth) + "px";
-  } else {
-    this.horiz.style.display = "";
-    this.horiz.firstChild.style.width = "0";
-  }
-
-  if (!this.checkedZeroWidth && measure.clientHeight > 0) {
-    if (sWidth == 0) { this.zeroWidthHack(); }
-    this.checkedZeroWidth = true;
-  }
-
-  return {right: needsV ? sWidth : 0, bottom: needsH ? sWidth : 0}
-};
-
-NativeScrollbars.prototype.setScrollLeft = function (pos) {
-  if (this.horiz.scrollLeft != pos) { this.horiz.scrollLeft = pos; }
-  if (this.disableHoriz) { this.enableZeroWidthBar(this.horiz, this.disableHoriz, "horiz"); }
-};
-
-NativeScrollbars.prototype.setScrollTop = function (pos) {
-  if (this.vert.scrollTop != pos) { this.vert.scrollTop = pos; }
-  if (this.disableVert) { this.enableZeroWidthBar(this.vert, this.disableVert, "vert"); }
-};
-
-NativeScrollbars.prototype.zeroWidthHack = function () {
-  var w = mac && !mac_geMountainLion ? "12px" : "18px";
-  this.horiz.style.height = this.vert.style.width = w;
-  this.horiz.style.pointerEvents = this.vert.style.pointerEvents = "none";
-  this.disableHoriz = new Delayed;
-  this.disableVert = new Delayed;
-};
-
-NativeScrollbars.prototype.enableZeroWidthBar = function (bar, delay, type) {
-  bar.style.pointerEvents = "auto";
-  function maybeDisable() {
-    // To find out whether the scrollbar is still visible, we
-    // check whether the element under the pixel in the bottom
-    // right corner of the scrollbar box is the scrollbar box
-    // itself (when the bar is still visible) or its filler child
-    // (when the bar is hidden). If it is still visible, we keep
-    // it enabled, if it's hidden, we disable pointer events.
-    var box = bar.getBoundingClientRect();
-    var elt$$1 = type == "vert" ? document.elementFromPoint(box.right - 1, (box.top + box.bottom) / 2)
-        : document.elementFromPoint((box.right + box.left) / 2, box.bottom - 1);
-    if (elt$$1 != bar) { bar.style.pointerEvents = "none"; }
-    else { delay.set(1000, maybeDisable); }
-  }
-  delay.set(1000, maybeDisable);
-};
-
-NativeScrollbars.prototype.clear = function () {
-  var parent = this.horiz.parentNode;
-  parent.removeChild(this.horiz);
-  parent.removeChild(this.vert);
-};
-
-var NullScrollbars = function () {};
-
-NullScrollbars.prototype.update = function () { return {bottom: 0, right: 0} };
-NullScrollbars.prototype.setScrollLeft = function () {};
-NullScrollbars.prototype.setScrollTop = function () {};
-NullScrollbars.prototype.clear = function () {};
-
-function updateScrollbars(cm, measure) {
-  if (!measure) { measure = measureForScrollbars(cm); }
-  var startWidth = cm.display.barWidth, startHeight = cm.display.barHeight;
-  updateScrollbarsInner(cm, measure);
-  for (var i = 0; i < 4 && startWidth != cm.display.barWidth || startHeight != cm.display.barHeight; i++) {
-    if (startWidth != cm.display.barWidth && cm.options.lineWrapping)
-      { updateHeightsInViewport(cm); }
-    updateScrollbarsInner(cm, measureForScrollbars(cm));
-    startWidth = cm.display.barWidth; startHeight = cm.display.barHeight;
-  }
-}
-
-// Re-synchronize the fake scrollbars with the actual size of the
-// content.
-function updateScrollbarsInner(cm, measure) {
-  var d = cm.display;
-  var sizes = d.scrollbars.update(measure);
-
-  d.sizer.style.paddingRight = (d.barWidth = sizes.right) + "px";
-  d.sizer.style.paddingBottom = (d.barHeight = sizes.bottom) + "px";
-  d.heightForcer.style.borderBottom = sizes.bottom + "px solid transparent";
-
-  if (sizes.right && sizes.bottom) {
-    d.scrollbarFiller.style.display = "block";
-    d.scrollbarFiller.style.height = sizes.bottom + "px";
-    d.scrollbarFiller.style.width = sizes.right + "px";
-  } else { d.scrollbarFiller.style.display = ""; }
-  if (sizes.bottom && cm.options.coverGutterNextToScrollbar && cm.options.fixedGutter) {
-    d.gutterFiller.style.display = "block";
-    d.gutterFiller.style.height = sizes.bottom + "px";
-    d.gutterFiller.style.width = measure.gutterWidth + "px";
-  } else { d.gutterFiller.style.display = ""; }
-}
-
-var scrollbarModel = {"native": NativeScrollbars, "null": NullScrollbars};
-
-function initScrollbars(cm) {
-  if (cm.display.scrollbars) {
-    cm.display.scrollbars.clear();
-    if (cm.display.scrollbars.addClass)
-      { rmClass(cm.display.wrapper, cm.display.scrollbars.addClass); }
-  }
-
-  cm.display.scrollbars = new scrollbarModel[cm.options.scrollbarStyle](function (node) {
-    cm.display.wrapper.insertBefore(node, cm.display.scrollbarFiller);
-    // Prevent clicks in the scrollbars from killing focus
-    on(node, "mousedown", function () {
-      if (cm.state.focused) { setTimeout(function () { return cm.display.input.focus(); }, 0); }
-    });
-    node.setAttribute("cm-not-content", "true");
-  }, function (pos, axis) {
-    if (axis == "horizontal") { setScrollLeft(cm, pos); }
-    else { updateScrollTop(cm, pos); }
-  }, cm);
-  if (cm.display.scrollbars.addClass)
-    { addClass(cm.display.wrapper, cm.display.scrollbars.addClass); }
-}
-
-// Operations are used to wrap a series of changes to the editor
-// state in such a way that each change won't have to update the
-// cursor and display (which would be awkward, slow, and
-// error-prone). Instead, display updates are batched and then all
-// combined and executed at once.
-
-var nextOpId = 0;
-// Start a new operation.
-function startOperation(cm) {
-  cm.curOp = {
-    cm: cm,
-    viewChanged: false,      // Flag that indicates that lines might need to be redrawn
-    startHeight: cm.doc.height, // Used to detect need to update scrollbar
-    forceUpdate: false,      // Used to force a redraw
-    updateInput: null,       // Whether to reset the input textarea
-    typing: false,           // Whether this reset should be careful to leave existing text (for compositing)
-    changeObjs: null,        // Accumulated changes, for firing change events
-    cursorActivityHandlers: null, // Set of handlers to fire cursorActivity on
-    cursorActivityCalled: 0, // Tracks which cursorActivity handlers have been called already
-    selectionChanged: false, // Whether the selection needs to be redrawn
-    updateMaxLine: false,    // Set when the widest line needs to be determined anew
-    scrollLeft: null, scrollTop: null, // Intermediate scroll position, not pushed to DOM yet
-    scrollToPos: null,       // Used to scroll to a specific position
-    focus: false,
-    id: ++nextOpId           // Unique ID
-  };
-  pushOperation(cm.curOp);
-}
-
-// Finish an operation, updating the display and signalling delayed events
-function endOperation(cm) {
-  var op = cm.curOp;
-  finishOperation(op, function (group) {
-    for (var i = 0; i < group.ops.length; i++)
-      { group.ops[i].cm.curOp = null; }
-    endOperations(group);
-  });
-}
-
-// The DOM updates done when an operation finishes are batched so
-// that the minimum number of relayouts are required.
-function endOperations(group) {
-  var ops = group.ops;
-  for (var i = 0; i < ops.length; i++) // Read DOM
-    { endOperation_R1(ops[i]); }
-  for (var i$1 = 0; i$1 < ops.length; i$1++) // Write DOM (maybe)
-    { endOperation_W1(ops[i$1]); }
-  for (var i$2 = 0; i$2 < ops.length; i$2++) // Read DOM
-    { endOperation_R2(ops[i$2]); }
-  for (var i$3 = 0; i$3 < ops.length; i$3++) // Write DOM (maybe)
-    { endOperation_W2(ops[i$3]); }
-  for (var i$4 = 0; i$4 < ops.length; i$4++) // Read DOM
-    { endOperation_finish(ops[i$4]); }
-}
-
-function endOperation_R1(op) {
-  var cm = op.cm, display = cm.display;
-  maybeClipScrollbars(cm);
-  if (op.updateMaxLine) { findMaxLine(cm); }
-
-  op.mustUpdate = op.viewChanged || op.forceUpdate || op.scrollTop != null ||
-    op.scrollToPos && (op.scrollToPos.from.line < display.viewFrom ||
-                       op.scrollToPos.to.line >= display.viewTo) ||
-    display.maxLineChanged && cm.options.lineWrapping;
-  op.update = op.mustUpdate &&
-    new DisplayUpdate(cm, op.mustUpdate && {top: op.scrollTop, ensure: op.scrollToPos}, op.forceUpdate);
-}
-
-function endOperation_W1(op) {
-  op.updatedDisplay = op.mustUpdate && updateDisplayIfNeeded(op.cm, op.update);
-}
-
-function endOperation_R2(op) {
-  var cm = op.cm, display = cm.display;
-  if (op.updatedDisplay) { updateHeightsInViewport(cm); }
-
-  op.barMeasure = measureForScrollbars(cm);
-
-  // If the max line changed since it was last measured, measure it,
-  // and ensure the document's width matches it.
-  // updateDisplay_W2 will use these properties to do the actual resizing
-  if (display.maxLineChanged && !cm.options.lineWrapping) {
-    op.adjustWidthTo = measureChar(cm, display.maxLine, display.maxLine.text.length).left + 3;
-    cm.display.sizerWidth = op.adjustWidthTo;
-    op.barMeasure.scrollWidth =
-      Math.max(display.scroller.clientWidth, display.sizer.offsetLeft + op.adjustWidthTo + scrollGap(cm) + cm.display.barWidth);
-    op.maxScrollLeft = Math.max(0, display.sizer.offsetLeft + op.adjustWidthTo - displayWidth(cm));
-  }
-
-  if (op.updatedDisplay || op.selectionChanged)
-    { op.preparedSelection = display.input.prepareSelection(); }
-}
-
-function endOperation_W2(op) {
-  var cm = op.cm;
-
-  if (op.adjustWidthTo != null) {
-    cm.display.sizer.style.minWidth = op.adjustWidthTo + "px";
-    if (op.maxScrollLeft < cm.doc.scrollLeft)
-      { setScrollLeft(cm, Math.min(cm.display.scroller.scrollLeft, op.maxScrollLeft), true); }
-    cm.display.maxLineChanged = false;
-  }
-
-  var takeFocus = op.focus && op.focus == activeElt();
-  if (op.preparedSelection)
-    { cm.display.input.showSelection(op.preparedSelection, takeFocus); }
-  if (op.updatedDisplay || op.startHeight != cm.doc.height)
-    { updateScrollbars(cm, op.barMeasure); }
-  if (op.updatedDisplay)
-    { setDocumentHeight(cm, op.barMeasure); }
-
-  if (op.selectionChanged) { restartBlink(cm); }
-
-  if (cm.state.focused && op.updateInput)
-    { cm.display.input.reset(op.typing); }
-  if (takeFocus) { ensureFocus(op.cm); }
-}
-
-function endOperation_finish(op) {
-  var cm = op.cm, display = cm.display, doc = cm.doc;
-
-  if (op.updatedDisplay) { postUpdateDisplay(cm, op.update); }
-
-  // Abort mouse wheel delta measurement, when scrolling explicitly
-  if (display.wheelStartX != null && (op.scrollTop != null || op.scrollLeft != null || op.scrollToPos))
-    { display.wheelStartX = display.wheelStartY = null; }
-
-  // Propagate the scroll position to the actual DOM scroller
-  if (op.scrollTop != null) { setScrollTop(cm, op.scrollTop, op.forceScroll); }
-
-  if (op.scrollLeft != null) { setScrollLeft(cm, op.scrollLeft, true, true); }
-  // If we need to scroll a specific position into view, do so.
-  if (op.scrollToPos) {
-    var rect = scrollPosIntoView(cm, clipPos(doc, op.scrollToPos.from),
-                                 clipPos(doc, op.scrollToPos.to), op.scrollToPos.margin);
-    maybeScrollWindow(cm, rect);
-  }
-
-  // Fire events for markers that are hidden/unidden by editing or
-  // undoing
-  var hidden = op.maybeHiddenMarkers, unhidden = op.maybeUnhiddenMarkers;
-  if (hidden) { for (var i = 0; i < hidden.length; ++i)
-    { if (!hidden[i].lines.length) { signal(hidden[i], "hide"); } } }
-  if (unhidden) { for (var i$1 = 0; i$1 < unhidden.length; ++i$1)
-    { if (unhidden[i$1].lines.length) { signal(unhidden[i$1], "unhide"); } } }
-
-  if (display.wrapper.offsetHeight)
-    { doc.scrollTop = cm.display.scroller.scrollTop; }
-
-  // Fire change events, and delayed event handlers
-  if (op.changeObjs)
-    { signal(cm, "changes", cm, op.changeObjs); }
-  if (op.update)
-    { op.update.finish(); }
-}
-
-// Run the given function in an operation
-function runInOp(cm, f) {
-  if (cm.curOp) { return f() }
-  startOperation(cm);
-  try { return f() }
-  finally { endOperation(cm); }
-}
-// Wraps a function in an operation. Returns the wrapped function.
-function operation(cm, f) {
-  return function() {
-    if (cm.curOp) { return f.apply(cm, arguments) }
-    startOperation(cm);
-    try { return f.apply(cm, arguments) }
-    finally { endOperation(cm); }
-  }
-}
-// Used to add methods to editor and doc instances, wrapping them in
-// operations.
-function methodOp(f) {
-  return function() {
-    if (this.curOp) { return f.apply(this, arguments) }
-    startOperation(this);
-    try { return f.apply(this, arguments) }
-    finally { endOperation(this); }
-  }
-}
-function docMethodOp(f) {
-  return function() {
-    var cm = this.cm;
-    if (!cm || cm.curOp) { return f.apply(this, arguments) }
-    startOperation(cm);
-    try { return f.apply(this, arguments) }
-    finally { endOperation(cm); }
-  }
-}
-
-// Updates the display.view data structure for a given change to the
-// document. From and to are in pre-change coordinates. Lendiff is
-// the amount of lines added or subtracted by the change. This is
-// used for changes that span multiple lines, or change the way
-// lines are divided into visual lines. regLineChange (below)
-// registers single-line changes.
-function regChange(cm, from, to, lendiff) {
-  if (from == null) { from = cm.doc.first; }
-  if (to == null) { to = cm.doc.first + cm.doc.size; }
-  if (!lendiff) { lendiff = 0; }
-
-  var display = cm.display;
-  if (lendiff && to < display.viewTo &&
-      (display.updateLineNumbers == null || display.updateLineNumbers > from))
-    { display.updateLineNumbers = from; }
-
-  cm.curOp.viewChanged = true;
-
-  if (from >= display.viewTo) { // Change after
-    if (sawCollapsedSpans && visualLineNo(cm.doc, from) < display.viewTo)
-      { resetView(cm); }
-  } else if (to <= display.viewFrom) { // Change before
-    if (sawCollapsedSpans && visualLineEndNo(cm.doc, to + lendiff) > display.viewFrom) {
-      resetView(cm);
-    } else {
-      display.viewFrom += lendiff;
-      display.viewTo += lendiff;
-    }
-  } else if (from <= display.viewFrom && to >= display.viewTo) { // Full overlap
-    resetView(cm);
-  } else if (from <= display.viewFrom) { // Top overlap
-    var cut = viewCuttingPoint(cm, to, to + lendiff, 1);
-    if (cut) {
-      display.view = display.view.slice(cut.index);
-      display.viewFrom = cut.lineN;
-      display.viewTo += lendiff;
-    } else {
-      resetView(cm);
-    }
-  } else if (to >= display.viewTo) { // Bottom overlap
-    var cut$1 = viewCuttingPoint(cm, from, from, -1);
-    if (cut$1) {
-      display.view = display.view.slice(0, cut$1.index);
-      display.viewTo = cut$1.lineN;
-    } else {
-      resetView(cm);
-    }
-  } else { // Gap in the middle
-    var cutTop = viewCuttingPoint(cm, from, from, -1);
-    var cutBot = viewCuttingPoint(cm, to, to + lendiff, 1);
-    if (cutTop && cutBot) {
-      display.view = display.view.slice(0, cutTop.index)
-        .concat(buildViewArray(cm, cutTop.lineN, cutBot.lineN))
-        .concat(display.view.slice(cutBot.index));
-      display.viewTo += lendiff;
-    } else {
-      resetView(cm);
-    }
-  }
-
-  var ext = display.externalMeasured;
-  if (ext) {
-    if (to < ext.lineN)
-      { ext.lineN += lendiff; }
-    else if (from < ext.lineN + ext.size)
-      { display.externalMeasured = null; }
-  }
-}
-
-// Register a change to a single line. Type must be one of "text",
-// "gutter", "class", "widget"
-function regLineChange(cm, line, type) {
-  cm.curOp.viewChanged = true;
-  var display = cm.display, ext = cm.display.externalMeasured;
-  if (ext && line >= ext.lineN && line < ext.lineN + ext.size)
-    { display.externalMeasured = null; }
-
-  if (line < display.viewFrom || line >= display.viewTo) { return }
-  var lineView = display.view[findViewIndex(cm, line)];
-  if (lineView.node == null) { return }
-  var arr = lineView.changes || (lineView.changes = []);
-  if (indexOf(arr, type) == -1) { arr.push(type); }
-}
-
-// Clear the view.
-function resetView(cm) {
-  cm.display.viewFrom = cm.display.viewTo = cm.doc.first;
-  cm.display.view = [];
-  cm.display.viewOffset = 0;
-}
-
-function viewCuttingPoint(cm, oldN, newN, dir) {
-  var index = findViewIndex(cm, oldN), diff, view = cm.display.view;
-  if (!sawCollapsedSpans || newN == cm.doc.first + cm.doc.size)
-    { return {index: index, lineN: newN} }
-  var n = cm.display.viewFrom;
-  for (var i = 0; i < index; i++)
-    { n += view[i].size; }
-  if (n != oldN) {
-    if (dir > 0) {
-      if (index == view.length - 1) { return null }
-      diff = (n + view[index].size) - oldN;
-      index++;
-    } else {
-      diff = n - oldN;
-    }
-    oldN += diff; newN += diff;
-  }
-  while (visualLineNo(cm.doc, newN) != newN) {
-    if (index == (dir < 0 ? 0 : view.length - 1)) { return null }
-    newN += dir * view[index - (dir < 0 ? 1 : 0)].size;
-    index += dir;
-  }
-  return {index: index, lineN: newN}
-}
-
-// Force the view to cover a given range, adding empty view element
-// or clipping off existing ones as needed.
-function adjustView(cm, from, to) {
-  var display = cm.display, view = display.view;
-  if (view.length == 0 || from >= display.viewTo || to <= display.viewFrom) {
-    display.view = buildViewArray(cm, from, to);
-    display.viewFrom = from;
-  } else {
-    if (display.viewFrom > from)
-      { display.view = buildViewArray(cm, from, display.viewFrom).concat(display.view); }
-    else if (display.viewFrom < from)
-      { display.view = display.view.slice(findViewIndex(cm, from)); }
-    display.viewFrom = from;
-    if (display.viewTo < to)
-      { display.view = display.view.concat(buildViewArray(cm, display.viewTo, to)); }
-    else if (display.viewTo > to)
-      { display.view = display.view.slice(0, findViewIndex(cm, to)); }
-  }
-  display.viewTo = to;
-}
-
-// Count the number of lines in the view whose DOM representation is
-// out of date (or nonexistent).
-function countDirtyView(cm) {
-  var view = cm.display.view, dirty = 0;
-  for (var i = 0; i < view.length; i++) {
-    var lineView = view[i];
-    if (!lineView.hidden && (!lineView.node || lineView.changes)) { ++dirty; }
-  }
-  return dirty
-}
-
-// HIGHLIGHT WORKER
-
-function startWorker(cm, time) {
-  if (cm.doc.highlightFrontier < cm.display.viewTo)
-    { cm.state.highlight.set(time, bind(highlightWorker, cm)); }
-}
-
-function highlightWorker(cm) {
-  var doc = cm.doc;
-  if (doc.highlightFrontier >= cm.display.viewTo) { return }
-  var end = +new Date + cm.options.workTime;
-  var context = getContextBefore(cm, doc.highlightFrontier);
-  var changedLines = [];
-
-  doc.iter(context.line, Math.min(doc.first + doc.size, cm.display.viewTo + 500), function (line) {
-    if (context.line >= cm.display.viewFrom) { // Visible
-      var oldStyles = line.styles;
-      var resetState = line.text.length > cm.options.maxHighlightLength ? copyState(doc.mode, context.state) : null;
-      var highlighted = highlightLine(cm, line, context, true);
-      if (resetState) { context.state = resetState; }
-      line.styles = highlighted.styles;
-      var oldCls = line.styleClasses, newCls = highlighted.classes;
-      if (newCls) { line.styleClasses = newCls; }
-      else if (oldCls) { line.styleClasses = null; }
-      var ischange = !oldStyles || oldStyles.length != line.styles.length ||
-        oldCls != newCls && (!oldCls || !newCls || oldCls.bgClass != newCls.bgClass || oldCls.textClass != newCls.textClass);
-      for (var i = 0; !ischange && i < oldStyles.length; ++i) { ischange = oldStyles[i] != line.styles[i]; }
-      if (ischange) { changedLines.push(context.line); }
-      line.stateAfter = context.save();
-      context.nextLine();
-    } else {
-      if (line.text.length <= cm.options.maxHighlightLength)
-        { processLine(cm, line.text, context); }
-      line.stateAfter = context.line % 5 == 0 ? context.save() : null;
-      context.nextLine();
-    }
-    if (+new Date > end) {
-      startWorker(cm, cm.options.workDelay);
-      return true
-    }
-  });
-  doc.highlightFrontier = context.line;
-  doc.modeFrontier = Math.max(doc.modeFrontier, context.line);
-  if (changedLines.length) { runInOp(cm, function () {
-    for (var i = 0; i < changedLines.length; i++)
-      { regLineChange(cm, changedLines[i], "text"); }
-  }); }
-}
-
-// DISPLAY DRAWING
-
-var DisplayUpdate = function(cm, viewport, force) {
-  var display = cm.display;
-
-  this.viewport = viewport;
-  // Store some values that we'll need later (but don't want to force a relayout for)
-  this.visible = visibleLines(display, cm.doc, viewport);
-  this.editorIsHidden = !display.wrapper.offsetWidth;
-  this.wrapperHeight = display.wrapper.clientHeight;
-  this.wrapperWidth = display.wrapper.clientWidth;
-  this.oldDisplayWidth = displayWidth(cm);
-  this.force = force;
-  this.dims = getDimensions(cm);
-  this.events = [];
-};
-
-DisplayUpdate.prototype.signal = function (emitter, type) {
-  if (hasHandler(emitter, type))
-    { this.events.push(arguments); }
-};
-DisplayUpdate.prototype.finish = function () {
-    var this$1 = this;
-
-  for (var i = 0; i < this.events.length; i++)
-    { signal.apply(null, this$1.events[i]); }
-};
-
-function maybeClipScrollbars(cm) {
-  var display = cm.display;
-  if (!display.scrollbarsClipped && display.scroller.offsetWidth) {
-    display.nativeBarWidth = display.scroller.offsetWidth - display.scroller.clientWidth;
-    display.heightForcer.style.height = scrollGap(cm) + "px";
-    display.sizer.style.marginBottom = -display.nativeBarWidth + "px";
-    display.sizer.style.borderRightWidth = scrollGap(cm) + "px";
-    display.scrollbarsClipped = true;
-  }
-}
-
-function selectionSnapshot(cm) {
-  if (cm.hasFocus()) { return null }
-  var active = activeElt();
-  if (!active || !contains(cm.display.lineDiv, active)) { return null }
-  var result = {activeElt: active};
-  if (window.getSelection) {
-    var sel = window.getSelection();
-    if (sel.anchorNode && sel.extend && contains(cm.display.lineDiv, sel.anchorNode)) {
-      result.anchorNode = sel.anchorNode;
-      result.anchorOffset = sel.anchorOffset;
-      result.focusNode = sel.focusNode;
-      result.focusOffset = sel.focusOffset;
-    }
-  }
-  return result
-}
-
-function restoreSelection(snapshot) {
-  if (!snapshot || !snapshot.activeElt || snapshot.activeElt == activeElt()) { return }
-  snapshot.activeElt.focus();
-  if (snapshot.anchorNode && contains(document.body, snapshot.anchorNode) && contains(document.body, snapshot.focusNode)) {
-    var sel = window.getSelection(), range$$1 = document.createRange();
-    range$$1.setEnd(snapshot.anchorNode, snapshot.anchorOffset);
-    range$$1.collapse(false);
-    sel.removeAllRanges();
-    sel.addRange(range$$1);
-    sel.extend(snapshot.focusNode, snapshot.focusOffset);
-  }
-}
-
-// Does the actual updating of the line display. Bails out
-// (returning false) when there is nothing to be done and forced is
-// false.
-function updateDisplayIfNeeded(cm, update) {
-  var display = cm.display, doc = cm.doc;
-
-  if (update.editorIsHidden) {
-    resetView(cm);
-    return false
-  }
-
-  // Bail out if the visible area is already rendered and nothing changed.
-  if (!update.force &&
-      update.visible.from >= display.viewFrom && update.visible.to <= display.viewTo &&
-      (display.updateLineNumbers == null || display.updateLineNumbers >= display.viewTo) &&
-      display.renderedView == display.view && countDirtyView(cm) == 0)
-    { return false }
-
-  if (maybeUpdateLineNumberWidth(cm)) {
-    resetView(cm);
-    update.dims = getDimensions(cm);
-  }
-
-  // Compute a suitable new viewport (from & to)
-  var end = doc.first + doc.size;
-  var from = Math.max(update.visible.from - cm.options.viewportMargin, doc.first);
-  var to = Math.min(end, update.visible.to + cm.options.viewportMargin);
-  if (display.viewFrom < from && from - display.viewFrom < 20) { from = Math.max(doc.first, display.viewFrom); }
-  if (display.viewTo > to && display.viewTo - to < 20) { to = Math.min(end, display.viewTo); }
-  if (sawCollapsedSpans) {
-    from = visualLineNo(cm.doc, from);
-    to = visualLineEndNo(cm.doc, to);
-  }
-
-  var different = from != display.viewFrom || to != display.viewTo ||
-    display.lastWrapHeight != update.wrapperHeight || display.lastWrapWidth != update.wrapperWidth;
-  adjustView(cm, from, to);
-
-  display.viewOffset = heightAtLine(getLine(cm.doc, display.viewFrom));
-  // Position the mover div to align with the current scroll position
-  cm.display.mover.style.top = display.viewOffset + "px";
-
-  var toUpdate = countDirtyView(cm);
-  if (!different && toUpdate == 0 && !update.force && display.renderedView == display.view &&
-      (display.updateLineNumbers == null || display.updateLineNumbers >= display.viewTo))
-    { return false }
-
-  // For big changes, we hide the enclosing element during the
-  // update, since that speeds up the operations on most browsers.
-  var selSnapshot = selectionSnapshot(cm);
-  if (toUpdate > 4) { display.lineDiv.style.display = "none"; }
-  patchDisplay(cm, display.updateLineNumbers, update.dims);
-  if (toUpdate > 4) { display.lineDiv.style.display = ""; }
-  display.renderedView = display.view;
-  // There might have been a widget with a focused element that got
-  // hidden or updated, if so re-focus it.
-  restoreSelection(selSnapshot);
-
-  // Prevent selection and cursors from interfering with the scroll
-  // width and height.
-  removeChildren(display.cursorDiv);
-  removeChildren(display.selectionDiv);
-  display.gutters.style.height = display.sizer.style.minHeight = 0;
-
-  if (different) {
-    display.lastWrapHeight = update.wrapperHeight;
-    display.lastWrapWidth = update.wrapperWidth;
-    startWorker(cm, 400);
-  }
-
-  display.updateLineNumbers = null;
-
-  return true
-}
-
-function postUpdateDisplay(cm, update) {
-  var viewport = update.viewport;
-
-  for (var first = true;; first = false) {
-    if (!first || !cm.options.lineWrapping || update.oldDisplayWidth == displayWidth(cm)) {
-      // Clip forced viewport to actual scrollable area.
-      if (viewport && viewport.top != null)
-        { viewport = {top: Math.min(cm.doc.height + paddingVert(cm.display) - displayHeight(cm), viewport.top)}; }
-      // Updated line heights might result in the drawn area not
-      // actually covering the viewport. Keep looping until it does.
-      update.visible = visibleLines(cm.display, cm.doc, viewport);
-      if (update.visible.from >= cm.display.viewFrom && update.visible.to <= cm.display.viewTo)
-        { break }
-    }
-    if (!updateDisplayIfNeeded(cm, update)) { break }
-    updateHeightsInViewport(cm);
-    var barMeasure = measureForScrollbars(cm);
-    updateSelection(cm);
-    updateScrollbars(cm, barMeasure);
-    setDocumentHeight(cm, barMeasure);
-    update.force = false;
-  }
-
-  update.signal(cm, "update", cm);
-  if (cm.display.viewFrom != cm.display.reportedViewFrom || cm.display.viewTo != cm.display.reportedViewTo) {
-    update.signal(cm, "viewportChange", cm, cm.display.viewFrom, cm.display.viewTo);
-    cm.display.reportedViewFrom = cm.display.viewFrom; cm.display.reportedViewTo = cm.display.viewTo;
-  }
-}
-
-function updateDisplaySimple(cm, viewport) {
-  var update = new DisplayUpdate(cm, viewport);
-  if (updateDisplayIfNeeded(cm, update)) {
-    updateHeightsInViewport(cm);
-    postUpdateDisplay(cm, update);
-    var barMeasure = measureForScrollbars(cm);
-    updateSelection(cm);
-    updateScrollbars(cm, barMeasure);
-    setDocumentHeight(cm, barMeasure);
-    update.finish();
-  }
-}
-
-// Sync the actual display DOM structure with display.view, removing
-// nodes for lines that are no longer in view, and creating the ones
-// that are not there yet, and updating the ones that are out of
-// date.
-function patchDisplay(cm, updateNumbersFrom, dims) {
-  var display = cm.display, lineNumbers = cm.options.lineNumbers;
-  var container = display.lineDiv, cur = container.firstChild;
-
-  function rm(node) {
-    var next = node.nextSibling;
-    // Works around a throw-scroll bug in OS X Webkit
-    if (webkit && mac && cm.display.currentWheelTarget == node)
-      { node.style.display = "none"; }
-    else
-      { node.parentNode.removeChild(node); }
-    return next
-  }
-
-  var view = display.view, lineN = display.viewFrom;
-  // Loop over the elements in the view, syncing cur (the DOM nodes
-  // in display.lineDiv) with the view as we go.
-  for (var i = 0; i < view.length; i++) {
-    var lineView = view[i];
-    if (lineView.hidden) {
-    } else if (!lineView.node || lineView.node.parentNode != container) { // Not drawn yet
-      var node = buildLineElement(cm, lineView, lineN, dims);
-      container.insertBefore(node, cur);
-    } else { // Already drawn
-      while (cur != lineView.node) { cur = rm(cur); }
-      var updateNumber = lineNumbers && updateNumbersFrom != null &&
-        updateNumbersFrom <= lineN && lineView.lineNumber;
-      if (lineView.changes) {
-        if (indexOf(lineView.changes, "gutter") > -1) { updateNumber = false; }
-        updateLineForChanges(cm, lineView, lineN, dims);
-      }
-      if (updateNumber) {
-        removeChildren(lineView.lineNumber);
-        lineView.lineNumber.appendChild(document.createTextNode(lineNumberFor(cm.options, lineN)));
-      }
-      cur = lineView.node.nextSibling;
-    }
-    lineN += lineView.size;
-  }
-  while (cur) { cur = rm(cur); }
-}
-
-function updateGutterSpace(cm) {
-  var width = cm.display.gutters.offsetWidth;
-  cm.display.sizer.style.marginLeft = width + "px";
-}
-
-function setDocumentHeight(cm, measure) {
-  cm.display.sizer.style.minHeight = measure.docHeight + "px";
-  cm.display.heightForcer.style.top = measure.docHeight + "px";
-  cm.display.gutters.style.height = (measure.docHeight + cm.display.barHeight + scrollGap(cm)) + "px";
-}
-
-// Rebuild the gutter elements, ensure the margin to the left of the
-// code matches their width.
-function updateGutters(cm) {
-  var gutters = cm.display.gutters, specs = cm.options.gutters;
-  removeChildren(gutters);
-  var i = 0;
-  for (; i < specs.length; ++i) {
-    var gutterClass = specs[i];
-    var gElt = gutters.appendChild(elt("div", null, "CodeMirror-gutter " + gutterClass));
-    if (gutterClass == "CodeMirror-linenumbers") {
-      cm.display.lineGutter = gElt;
-      gElt.style.width = (cm.display.lineNumWidth || 1) + "px";
-    }
-  }
-  gutters.style.display = i ? "" : "none";
-  updateGutterSpace(cm);
-}
-
-// Make sure the gutters options contains the element
-// "CodeMirror-linenumbers" when the lineNumbers option is true.
-function setGuttersForLineNumbers(options) {
-  var found = indexOf(options.gutters, "CodeMirror-linenumbers");
-  if (found == -1 && options.lineNumbers) {
-    options.gutters = options.gutters.concat(["CodeMirror-linenumbers"]);
-  } else if (found > -1 && !options.lineNumbers) {
-    options.gutters = options.gutters.slice(0);
-    options.gutters.splice(found, 1);
-  }
-}
-
-// Since the delta values reported on mouse wheel events are
-// unstandardized between browsers and even browser versions, and
-// generally horribly unpredictable, this code starts by measuring
-// the scroll effect that the first few mouse wheel events have,
-// and, from that, detects the way it can convert deltas to pixel
-// offsets afterwards.
-//
-// The reason we want to know the amount a wheel event will scroll
-// is that it gives us a chance to update the display before the
-// actual scrolling happens, reducing flickering.
-
-var wheelSamples = 0;
-var wheelPixelsPerUnit = null;
-// Fill in a browser-detected starting value on browsers where we
-// know one. These don't have to be accurate -- the result of them
-// being wrong would just be a slight flicker on the first wheel
-// scroll (if it is large enough).
-if (ie) { wheelPixelsPerUnit = -.53; }
-else if (gecko) { wheelPixelsPerUnit = 15; }
-else if (chrome) { wheelPixelsPerUnit = -.7; }
-else if (safari) { wheelPixelsPerUnit = -1/3; }
-
-function wheelEventDelta(e) {
-  var dx = e.wheelDeltaX, dy = e.wheelDeltaY;
-  if (dx == null && e.detail && e.axis == e.HORIZONTAL_AXIS) { dx = e.detail; }
-  if (dy == null && e.detail && e.axis == e.VERTICAL_AXIS) { dy = e.detail; }
-  else if (dy == null) { dy = e.wheelDelta; }
-  return {x: dx, y: dy}
-}
-function wheelEventPixels(e) {
-  var delta = wheelEventDelta(e);
-  delta.x *= wheelPixelsPerUnit;
-  delta.y *= wheelPixelsPerUnit;
-  return delta
-}
-
-function onScrollWheel(cm, e) {
-  var delta = wheelEventDelta(e), dx = delta.x, dy = delta.y;
-
-  var display = cm.display, scroll = display.scroller;
-  // Quit if there's nothing to scroll here
-  var canScrollX = scroll.scrollWidth > scroll.clientWidth;
-  var canScrollY = scroll.scrollHeight > scroll.clientHeight;
-  if (!(dx && canScrollX || dy && canScrollY)) { return }
-
-  // Webkit browsers on OS X abort momentum scrolls when the target
-  // of the scroll event is removed from the scrollable element.
-  // This hack (see related code in patchDisplay) makes sure the
-  // element is kept around.
-  if (dy && mac && webkit) {
-    outer: for (var cur = e.target, view = display.view; cur != scroll; cur = cur.parentNode) {
-      for (var i = 0; i < view.length; i++) {
-        if (view[i].node == cur) {
-          cm.display.currentWheelTarget = cur;
-          break outer
-        }
-      }
-    }
-  }
-
-  // On some browsers, horizontal scrolling will cause redraws to
-  // happen before the gutter has been realigned, causing it to
-  // wriggle around in a most unseemly way. When we have an
-  // estimated pixels/delta value, we just handle horizontal
-  // scrolling entirely here. It'll be slightly off from native, but
-  // better than glitching out.
-  if (dx && !gecko && !presto && wheelPixelsPerUnit != null) {
-    if (dy && canScrollY)
-      { updateScrollTop(cm, Math.max(0, scroll.scrollTop + dy * wheelPixelsPerUnit)); }
-    setScrollLeft(cm, Math.max(0, scroll.scrollLeft + dx * wheelPixelsPerUnit));
-    // Only prevent default scrolling if vertical scrolling is
-    // actually possible. Otherwise, it causes vertical scroll
-    // jitter on OSX trackpads when deltaX is small and deltaY
-    // is large (issue #3579)
-    if (!dy || (dy && canScrollY))
-      { e_preventDefault(e); }
-    display.wheelStartX = null; // Abort measurement, if in progress
-    return
-  }
-
-  // 'Project' the visible viewport to cover the area that is being
-  // scrolled into view (if we know enough to estimate it).
-  if (dy && wheelPixelsPerUnit != null) {
-    var pixels = dy * wheelPixelsPerUnit;
-    var top = cm.doc.scrollTop, bot = top + display.wrapper.clientHeight;
-    if (pixels < 0) { top = Math.max(0, top + pixels - 50); }
-    else { bot = Math.min(cm.doc.height, bot + pixels + 50); }
-    updateDisplaySimple(cm, {top: top, bottom: bot});
-  }
-
-  if (wheelSamples < 20) {
-    if (display.wheelStartX == null) {
-      display.wheelStartX = scroll.scrollLeft; display.wheelStartY = scroll.scrollTop;
-      display.wheelDX = dx; display.wheelDY = dy;
-      setTimeout(function () {
-        if (display.wheelStartX == null) { return }
-        var movedX = scroll.scrollLeft - display.wheelStartX;
-        var movedY = scroll.scrollTop - display.wheelStartY;
-        var sample = (movedY && display.wheelDY && movedY / display.wheelDY) ||
-          (movedX && display.wheelDX && movedX / display.wheelDX);
-        display.wheelStartX = display.wheelStartY = null;
-        if (!sample) { return }
-        wheelPixelsPerUnit = (wheelPixelsPerUnit * wheelSamples + sample) / (wheelSamples + 1);
-        ++wheelSamples;
-      }, 200);
-    } else {
-      display.wheelDX += dx; display.wheelDY += dy;
-    }
-  }
-}
-
-// Selection objects are immutable. A new one is created every time
-// the selection changes. A selection is one or more non-overlapping
-// (and non-touching) ranges, sorted, and an integer that indicates
-// which one is the primary selection (the one that's scrolled into
-// view, that getCursor returns, etc).
-var Selection = function(ranges, primIndex) {
-  this.ranges = ranges;
-  this.primIndex = primIndex;
-};
-
-Selection.prototype.primary = function () { return this.ranges[this.primIndex] };
-
-Selection.prototype.equals = function (other) {
-    var this$1 = this;
-
-  if (other == this) { return true }
-  if (other.primIndex != this.primIndex || other.ranges.length != this.ranges.length) { return false }
-  for (var i = 0; i < this.ranges.length; i++) {
-    var here = this$1.ranges[i], there = other.ranges[i];
-    if (!equalCursorPos(here.anchor, there.anchor) || !equalCursorPos(here.head, there.head)) { return false }
-  }
-  return true
-};
-
-Selection.prototype.deepCopy = function () {
-    var this$1 = this;
-
-  var out = [];
-  for (var i = 0; i < this.ranges.length; i++)
-    { out[i] = new Range(copyPos(this$1.ranges[i].anchor), copyPos(this$1.ranges[i].head)); }
-  return new Selection(out, this.primIndex)
-};
-
-Selection.prototype.somethingSelected = function () {
-    var this$1 = this;
-
-  for (var i = 0; i < this.ranges.length; i++)
-    { if (!this$1.ranges[i].empty()) { return true } }
-  return false
-};
-
-Selection.prototype.contains = function (pos, end) {
-    var this$1 = this;
-
-  if (!end) { end = pos; }
-  for (var i = 0; i < this.ranges.length; i++) {
-    var range = this$1.ranges[i];
-    if (cmp(end, range.from()) >= 0 && cmp(pos, range.to()) <= 0)
-      { return i }
-  }
-  return -1
-};
-
-var Range = function(anchor, head) {
-  this.anchor = anchor; this.head = head;
-};
-
-Range.prototype.from = function () { return minPos(this.anchor, this.head) };
-Range.prototype.to = function () { return maxPos(this.anchor, this.head) };
-Range.prototype.empty = function () { return this.head.line == this.anchor.line && this.head.ch == this.anchor.ch };
-
-// Take an unsorted, potentially overlapping set of ranges, and
-// build a selection out of it. 'Consumes' ranges array (modifying
-// it).
-function normalizeSelection(ranges, primIndex) {
-  var prim = ranges[primIndex];
-  ranges.sort(function (a, b) { return cmp(a.from(), b.from()); });
-  primIndex = indexOf(ranges, prim);
-  for (var i = 1; i < ranges.length; i++) {
-    var cur = ranges[i], prev = ranges[i - 1];
-    if (cmp(prev.to(), cur.from()) >= 0) {
-      var from = minPos(prev.from(), cur.from()), to = maxPos(prev.to(), cur.to());
-      var inv = prev.empty() ? cur.from() == cur.head : prev.from() == prev.head;
-      if (i <= primIndex) { --primIndex; }
-      ranges.splice(--i, 2, new Range(inv ? to : from, inv ? from : to));
-    }
-  }
-  return new Selection(ranges, primIndex)
-}
-
-function simpleSelection(anchor, head) {
-  return new Selection([new Range(anchor, head || anchor)], 0)
-}
-
-// Compute the position of the end of a change (its 'to' property
-// refers to the pre-change end).
-function changeEnd(change) {
-  if (!change.text) { return change.to }
-  return Pos(change.from.line + change.text.length - 1,
-             lst(change.text).length + (change.text.length == 1 ? change.from.ch : 0))
-}
-
-// Adjust a position to refer to the post-change position of the
-// same text, or the end of the change if the change covers it.
-function adjustForChange(pos, change) {
-  if (cmp(pos, change.from) < 0) { return pos }
-  if (cmp(pos, change.to) <= 0) { return changeEnd(change) }
-
-  var line = pos.line + change.text.length - (change.to.line - change.from.line) - 1, ch = pos.ch;
-  if (pos.line == change.to.line) { ch += changeEnd(change).ch - change.to.ch; }
-  return Pos(line, ch)
-}
-
-function computeSelAfterChange(doc, change) {
-  var out = [];
-  for (var i = 0; i < doc.sel.ranges.length; i++) {
-    var range = doc.sel.ranges[i];
-    out.push(new Range(adjustForChange(range.anchor, change),
-                       adjustForChange(range.head, change)));
-  }
-  return normalizeSelection(out, doc.sel.primIndex)
-}
-
-function offsetPos(pos, old, nw) {
-  if (pos.line == old.line)
-    { return Pos(nw.line, pos.ch - old.ch + nw.ch) }
-  else
-    { return Pos(nw.line + (pos.line - old.line), pos.ch) }
-}
-
-// Used by replaceSelections to allow moving the selection to the
-// start or around the replaced test. Hint may be "start" or "around".
-function computeReplacedSel(doc, changes, hint) {
-  var out = [];
-  var oldPrev = Pos(doc.first, 0), newPrev = oldPrev;
-  for (var i = 0; i < changes.length; i++) {
-    var change = changes[i];
-    var from = offsetPos(change.from, oldPrev, newPrev);
-    var to = offsetPos(changeEnd(change), oldPrev, newPrev);
-    oldPrev = change.to;
-    newPrev = to;
-    if (hint == "around") {
-      var range = doc.sel.ranges[i], inv = cmp(range.head, range.anchor) < 0;
-      out[i] = new Range(inv ? to : from, inv ? from : to);
-    } else {
-      out[i] = new Range(from, from);
-    }
-  }
-  return new Selection(out, doc.sel.primIndex)
-}
-
-// Used to get the editor into a consistent state again when options change.
-
-function loadMode(cm) {
-  cm.doc.mode = getMode(cm.options, cm.doc.modeOption);
-  resetModeState(cm);
-}
-
-function resetModeState(cm) {
-  cm.doc.iter(function (line) {
-    if (line.stateAfter) { line.stateAfter = null; }
-    if (line.styles) { line.styles = null; }
-  });
-  cm.doc.modeFrontier = cm.doc.highlightFrontier = cm.doc.first;
-  startWorker(cm, 100);
-  cm.state.modeGen++;
-  if (cm.curOp) { regChange(cm); }
-}
-
-// DOCUMENT DATA STRUCTURE
-
-// By default, updates that start and end at the beginning of a line
-// are treated specially, in order to make the association of line
-// widgets and marker elements with the text behave more intuitive.
-function isWholeLineUpdate(doc, change) {
-  return change.from.ch == 0 && change.to.ch == 0 && lst(change.text) == "" &&
-    (!doc.cm || doc.cm.options.wholeLineUpdateBefore)
-}
-
-// Perform a change on the document data structure.
-function updateDoc(doc, change, markedSpans, estimateHeight$$1) {
-  function spansFor(n) {return markedSpans ? markedSpans[n] : null}
-  function update(line, text, spans) {
-    updateLine(line, text, spans, estimateHeight$$1);
-    signalLater(line, "change", line, change);
-  }
-  function linesFor(start, end) {
-    var result = [];
-    for (var i = start; i < end; ++i)
-      { result.push(new Line(text[i], spansFor(i), estimateHeight$$1)); }
-    return result
-  }
-
-  var from = change.from, to = change.to, text = change.text;
-  var firstLine = getLine(doc, from.line), lastLine = getLine(doc, to.line);
-  var lastText = lst(text), lastSpans = spansFor(text.length - 1), nlines = to.line - from.line;
-
-  // Adjust the line structure
-  if (change.full) {
-    doc.insert(0, linesFor(0, text.length));
-    doc.remove(text.length, doc.size - text.length);
-  } else if (isWholeLineUpdate(doc, change)) {
-    // This is a whole-line replace. Treated specially to make
-    // sure line objects move the way they are supposed to.
-    var added = linesFor(0, text.length - 1);
-    update(lastLine, lastLine.text, lastSpans);
-    if (nlines) { doc.remove(from.line, nlines); }
-    if (added.length) { doc.insert(from.line, added); }
-  } else if (firstLine == lastLine) {
-    if (text.length == 1) {
-      update(firstLine, firstLine.text.slice(0, from.ch) + lastText + firstLine.text.slice(to.ch), lastSpans);
-    } else {
-      var added$1 = linesFor(1, text.length - 1);
-      added$1.push(new Line(lastText + firstLine.text.slice(to.ch), lastSpans, estimateHeight$$1));
-      update(firstLine, firstLine.text.slice(0, from.ch) + text[0], spansFor(0));
-      doc.insert(from.line + 1, added$1);
-    }
-  } else if (text.length == 1) {
-    update(firstLine, firstLine.text.slice(0, from.ch) + text[0] + lastLine.text.slice(to.ch), spansFor(0));
-    doc.remove(from.line + 1, nlines);
-  } else {
-    update(firstLine, firstLine.text.slice(0, from.ch) + text[0], spansFor(0));
-    update(lastLine, lastText + lastLine.text.slice(to.ch), lastSpans);
-    var added$2 = linesFor(1, text.length - 1);
-    if (nlines > 1) { doc.remove(from.line + 1, nlines - 1); }
-    doc.insert(from.line + 1, added$2);
-  }
-
-  signalLater(doc, "change", doc, change);
-}
-
-// Call f for all linked documents.
-function linkedDocs(doc, f, sharedHistOnly) {
-  function propagate(doc, skip, sharedHist) {
-    if (doc.linked) { for (var i = 0; i < doc.linked.length; ++i) {
-      var rel = doc.linked[i];
-      if (rel.doc == skip) { continue }
-      var shared = sharedHist && rel.sharedHist;
-      if (sharedHistOnly && !shared) { continue }
-      f(rel.doc, shared);
-      propagate(rel.doc, doc, shared);
-    } }
-  }
-  propagate(doc, null, true);
-}
-
-// Attach a document to an editor.
-function attachDoc(cm, doc) {
-  if (doc.cm) { throw new Error("This document is already in use.") }
-  cm.doc = doc;
-  doc.cm = cm;
-  estimateLineHeights(cm);
-  loadMode(cm);
-  setDirectionClass(cm);
-  if (!cm.options.lineWrapping) { findMaxLine(cm); }
-  cm.options.mode = doc.modeOption;
-  regChange(cm);
-}
-
-function setDirectionClass(cm) {
-  (cm.doc.direction == "rtl" ? addClass : rmClass)(cm.display.lineDiv, "CodeMirror-rtl");
-}
-
-function directionChanged(cm) {
-  runInOp(cm, function () {
-    setDirectionClass(cm);
-    regChange(cm);
-  });
-}
-
-function History(startGen) {
-  // Arrays of change events and selections. Doing something adds an
-  // event to done and clears undo. Undoing moves events from done
-  // to undone, redoing moves them in the other direction.
-  this.done = []; this.undone = [];
-  this.undoDepth = Infinity;
-  // Used to track when changes can be merged into a single undo
-  // event
-  this.lastModTime = this.lastSelTime = 0;
-  this.lastOp = this.lastSelOp = null;
-  this.lastOrigin = this.lastSelOrigin = null;
-  // Used by the isClean() method
-  this.generation = this.maxGeneration = startGen || 1;
-}
-
-// Create a history change event from an updateDoc-style change
-// object.
-function historyChangeFromChange(doc, change) {
-  var histChange = {from: copyPos(change.from), to: changeEnd(change), text: getBetween(doc, change.from, change.to)};
-  attachLocalSpans(doc, histChange, change.from.line, change.to.line + 1);
-  linkedDocs(doc, function (doc) { return attachLocalSpans(doc, histChange, change.from.line, change.to.line + 1); }, true);
-  return histChange
-}
-
-// Pop all selection events off the end of a history array. Stop at
-// a change event.
-function clearSelectionEvents(array) {
-  while (array.length) {
-    var last = lst(array);
-    if (last.ranges) { array.pop(); }
-    else { break }
-  }
-}
-
-// Find the top change event in the history. Pop off selection
-// events that are in the way.
-function lastChangeEvent(hist, force) {
-  if (force) {
-    clearSelectionEvents(hist.done);
-    return lst(hist.done)
-  } else if (hist.done.length && !lst(hist.done).ranges) {
-    return lst(hist.done)
-  } else if (hist.done.length > 1 && !hist.done[hist.done.length - 2].ranges) {
-    hist.done.pop();
-    return lst(hist.done)
-  }
-}
-
-// Register a change in the history. Merges changes that are within
-// a single operation, or are close together with an origin that
-// allows merging (starting with "+") into a single event.
-function addChangeToHistory(doc, change, selAfter, opId) {
-  var hist = doc.history;
-  hist.undone.length = 0;
-  var time = +new Date, cur;
-  var last;
-
-  if ((hist.lastOp == opId ||
-       hist.lastOrigin == change.origin && change.origin &&
-       ((change.origin.charAt(0) == "+" && hist.lastModTime > time - (doc.cm ? doc.cm.options.historyEventDelay : 500)) ||
-        change.origin.charAt(0) == "*")) &&
-      (cur = lastChangeEvent(hist, hist.lastOp == opId))) {
-    // Merge this change into the last event
-    last = lst(cur.changes);
-    if (cmp(change.from, change.to) == 0 && cmp(change.from, last.to) == 0) {
-      // Optimized case for simple insertion -- don't want to add
-      // new changesets for every character typed
-      last.to = changeEnd(change);
-    } else {
-      // Add new sub-event
-      cur.changes.push(historyChangeFromChange(doc, change));
-    }
-  } else {
-    // Can not be merged, start a new event.
-    var before = lst(hist.done);
-    if (!before || !before.ranges)
-      { pushSelectionToHistory(doc.sel, hist.done); }
-    cur = {changes: [historyChangeFromChange(doc, change)],
-           generation: hist.generation};
-    hist.done.push(cur);
-    while (hist.done.length > hist.undoDepth) {
-      hist.done.shift();
-      if (!hist.done[0].ranges) { hist.done.shift(); }
-    }
-  }
-  hist.done.push(selAfter);
-  hist.generation = ++hist.maxGeneration;
-  hist.lastModTime = hist.lastSelTime = time;
-  hist.lastOp = hist.lastSelOp = opId;
-  hist.lastOrigin = hist.lastSelOrigin = change.origin;
-
-  if (!last) { signal(doc, "historyAdded"); }
-}
-
-function selectionEventCanBeMerged(doc, origin, prev, sel) {
-  var ch = origin.charAt(0);
-  return ch == "*" ||
-    ch == "+" &&
-    prev.ranges.length == sel.ranges.length &&
-    prev.somethingSelected() == sel.somethingSelected() &&
-    new Date - doc.history.lastSelTime <= (doc.cm ? doc.cm.options.historyEventDelay : 500)
-}
-
-// Called whenever the selection changes, sets the new selection as
-// the pending selection in the history, and pushes the old pending
-// selection into the 'done' array when it was significantly
-// different (in number of selected ranges, emptiness, or time).
-function addSelectionToHistory(doc, sel, opId, options) {
-  var hist = doc.history, origin = options && options.origin;
-
-  // A new event is started when the previous origin does not match
-  // the current, or the origins don't allow matching. Origins
-  // starting with * are always merged, those starting with + are
-  // merged when similar and close together in time.
-  if (opId == hist.lastSelOp ||
-      (origin && hist.lastSelOrigin == origin &&
-       (hist.lastModTime == hist.lastSelTime && hist.lastOrigin == origin ||
-        selectionEventCanBeMerged(doc, origin, lst(hist.done), sel))))
-    { hist.done[hist.done.length - 1] = sel; }
-  else
-    { pushSelectionToHistory(sel, hist.done); }
-
-  hist.lastSelTime = +new Date;
-  hist.lastSelOrigin = origin;
-  hist.lastSelOp = opId;
-  if (options && options.clearRedo !== false)
-    { clearSelectionEvents(hist.undone); }
-}
-
-function pushSelectionToHistory(sel, dest) {
-  var top = lst(dest);
-  if (!(top && top.ranges && top.equals(sel)))
-    { dest.push(sel); }
-}
-
-// Used to store marked span information in the history.
-function attachLocalSpans(doc, change, from, to) {
-  var existing = change["spans_" + doc.id], n = 0;
-  doc.iter(Math.max(doc.first, from), Math.min(doc.first + doc.size, to), function (line) {
-    if (line.markedSpans)
-      { (existing || (existing = change["spans_" + doc.id] = {}))[n] = line.markedSpans; }
-    ++n;
-  });
-}
-
-// When un/re-doing restores text containing marked spans, those
-// that have been explicitly cleared should not be restored.
-function removeClearedSpans(spans) {
-  if (!spans) { return null }
-  var out;
-  for (var i = 0; i < spans.length; ++i) {
-    if (spans[i].marker.explicitlyCleared) { if (!out) { out = spans.slice(0, i); } }
-    else if (out) { out.push(spans[i]); }
-  }
-  return !out ? spans : out.length ? out : null
-}
-
-// Retrieve and filter the old marked spans stored in a change event.
-function getOldSpans(doc, change) {
-  var found = change["spans_" + doc.id];
-  if (!found) { return null }
-  var nw = [];
-  for (var i = 0; i < change.text.length; ++i)
-    { nw.push(removeClearedSpans(found[i])); }
-  return nw
-}
-
-// Used for un/re-doing changes from the history. Combines the
-// result of computing the existing spans with the set of spans that
-// existed in the history (so that deleting around a span and then
-// undoing brings back the span).
-function mergeOldSpans(doc, change) {
-  var old = getOldSpans(doc, change);
-  var stretched = stretchSpansOverChange(doc, change);
-  if (!old) { return stretched }
-  if (!stretched) { return old }
-
-  for (var i = 0; i < old.length; ++i) {
-    var oldCur = old[i], stretchCur = stretched[i];
-    if (oldCur && stretchCur) {
-      spans: for (var j = 0; j < stretchCur.length; ++j) {
-        var span = stretchCur[j];
-        for (var k = 0; k < oldCur.length; ++k)
-          { if (oldCur[k].marker == span.marker) { continue spans } }
-        oldCur.push(span);
-      }
-    } else if (stretchCur) {
-      old[i] = stretchCur;
-    }
-  }
-  return old
-}
-
-// Used both to provide a JSON-safe object in .getHistory, and, when
-// detaching a document, to split the history in two
-function copyHistoryArray(events, newGroup, instantiateSel) {
-  var copy = [];
-  for (var i = 0; i < events.length; ++i) {
-    var event = events[i];
-    if (event.ranges) {
-      copy.push(instantiateSel ? Selection.prototype.deepCopy.call(event) : event);
-      continue
-    }
-    var changes = event.changes, newChanges = [];
-    copy.push({changes: newChanges});
-    for (var j = 0; j < changes.length; ++j) {
-      var change = changes[j], m = (void 0);
-      newChanges.push({from: change.from, to: change.to, text: change.text});
-      if (newGroup) { for (var prop in change) { if (m = prop.match(/^spans_(\d+)$/)) {
-        if (indexOf(newGroup, Number(m[1])) > -1) {
-          lst(newChanges)[prop] = change[prop];
-          delete change[prop];
-        }
-      } } }
-    }
-  }
-  return copy
-}
-
-// The 'scroll' parameter given to many of these indicated whether
-// the new cursor position should be scrolled into view after
-// modifying the selection.
-
-// If shift is held or the extend flag is set, extends a range to
-// include a given position (and optionally a second position).
-// Otherwise, simply returns the range between the given positions.
-// Used for cursor motion and such.
-function extendRange(range, head, other, extend) {
-  if (extend) {
-    var anchor = range.anchor;
-    if (other) {
-      var posBefore = cmp(head, anchor) < 0;
-      if (posBefore != (cmp(other, anchor) < 0)) {
-        anchor = head;
-        head = other;
-      } else if (posBefore != (cmp(head, other) < 0)) {
-        head = other;
-      }
-    }
-    return new Range(anchor, head)
-  } else {
-    return new Range(other || head, head)
-  }
-}
-
-// Extend the primary selection range, discard the rest.
-function extendSelection(doc, head, other, options, extend) {
-  if (extend == null) { extend = doc.cm && (doc.cm.display.shift || doc.extend); }
-  setSelection(doc, new Selection([extendRange(doc.sel.primary(), head, other, extend)], 0), options);
-}
-
-// Extend all selections (pos is an array of selections with length
-// equal the number of selections)
-function extendSelections(doc, heads, options) {
-  var out = [];
-  var extend = doc.cm && (doc.cm.display.shift || doc.extend);
-  for (var i = 0; i < doc.sel.ranges.length; i++)
-    { out[i] = extendRange(doc.sel.ranges[i], heads[i], null, extend); }
-  var newSel = normalizeSelection(out, doc.sel.primIndex);
-  setSelection(doc, newSel, options);
-}
-
-// Updates a single range in the selection.
-function replaceOneSelection(doc, i, range, options) {
-  var ranges = doc.sel.ranges.slice(0);
-  ranges[i] = range;
-  setSelection(doc, normalizeSelection(ranges, doc.sel.primIndex), options);
-}
-
-// Reset the selection to a single range.
-function setSimpleSelection(doc, anchor, head, options) {
-  setSelection(doc, simpleSelection(anchor, head), options);
-}
-
-// Give beforeSelectionChange handlers a change to influence a
-// selection update.
-function filterSelectionChange(doc, sel, options) {
-  var obj = {
-    ranges: sel.ranges,
-    update: function(ranges) {
-      var this$1 = this;
-
-      this.ranges = [];
-      for (var i = 0; i < ranges.length; i++)
-        { this$1.ranges[i] = new Range(clipPos(doc, ranges[i].anchor),
-                                   clipPos(doc, ranges[i].head)); }
-    },
-    origin: options && options.origin
-  };
-  signal(doc, "beforeSelectionChange", doc, obj);
-  if (doc.cm) { signal(doc.cm, "beforeSelectionChange", doc.cm, obj); }
-  if (obj.ranges != sel.ranges) { return normalizeSelection(obj.ranges, obj.ranges.length - 1) }
-  else { return sel }
-}
-
-function setSelectionReplaceHistory(doc, sel, options) {
-  var done = doc.history.done, last = lst(done);
-  if (last && last.ranges) {
-    done[done.length - 1] = sel;
-    setSelectionNoUndo(doc, sel, options);
-  } else {
-    setSelection(doc, sel, options);
-  }
-}
-
-// Set a new selection.
-function setSelection(doc, sel, options) {
-  setSelectionNoUndo(doc, sel, options);
-  addSelectionToHistory(doc, doc.sel, doc.cm ? doc.cm.curOp.id : NaN, options);
-}
-
-function setSelectionNoUndo(doc, sel, options) {
-  if (hasHandler(doc, "beforeSelectionChange") || doc.cm && hasHandler(doc.cm, "beforeSelectionChange"))
-    { sel = filterSelectionChange(doc, sel, options); }
-
-  var bias = options && options.bias ||
-    (cmp(sel.primary().head, doc.sel.primary().head) < 0 ? -1 : 1);
-  setSelectionInner(doc, skipAtomicInSelection(doc, sel, bias, true));
-
-  if (!(options && options.scroll === false) && doc.cm)
-    { ensureCursorVisible(doc.cm); }
-}
-
-function setSelectionInner(doc, sel) {
-  if (sel.equals(doc.sel)) { return }
-
-  doc.sel = sel;
-
-  if (doc.cm) {
-    doc.cm.curOp.updateInput = doc.cm.curOp.selectionChanged = true;
-    signalCursorActivity(doc.cm);
-  }
-  signalLater(doc, "cursorActivity", doc);
-}
-
-// Verify that the selection does not partially select any atomic
-// marked ranges.
-function reCheckSelection(doc) {
-  setSelectionInner(doc, skipAtomicInSelection(doc, doc.sel, null, false));
-}
-
-// Return a selection that does not partially select any atomic
-// ranges.
-function skipAtomicInSelection(doc, sel, bias, mayClear) {
-  var out;
-  for (var i = 0; i < sel.ranges.length; i++) {
-    var range = sel.ranges[i];
-    var old = sel.ranges.length == doc.sel.ranges.length && doc.sel.ranges[i];
-    var newAnchor = skipAtomic(doc, range.anchor, old && old.anchor, bias, mayClear);
-    var newHead = skipAtomic(doc, range.head, old && old.head, bias, mayClear);
-    if (out || newAnchor != range.anchor || newHead != range.head) {
-      if (!out) { out = sel.ranges.slice(0, i); }
-      out[i] = new Range(newAnchor, newHead);
-    }
-  }
-  return out ? normalizeSelection(out, sel.primIndex) : sel
-}
-
-function skipAtomicInner(doc, pos, oldPos, dir, mayClear) {
-  var line = getLine(doc, pos.line);
-  if (line.markedSpans) { for (var i = 0; i < line.markedSpans.length; ++i) {
-    var sp = line.markedSpans[i], m = sp.marker;
-    if ((sp.from == null || (m.inclusiveLeft ? sp.from <= pos.ch : sp.from < pos.ch)) &&
-        (sp.to == null || (m.inclusiveRight ? sp.to >= pos.ch : sp.to > pos.ch))) {
-      if (mayClear) {
-        signal(m, "beforeCursorEnter");
-        if (m.explicitlyCleared) {
-          if (!line.markedSpans) { break }
-          else {--i; continue}
-        }
-      }
-      if (!m.atomic) { continue }
-
-      if (oldPos) {
-        var near = m.find(dir < 0 ? 1 : -1), diff = (void 0);
-        if (dir < 0 ? m.inclusiveRight : m.inclusiveLeft)
-          { near = movePos(doc, near, -dir, near && near.line == pos.line ? line : null); }
-        if (near && near.line == pos.line && (diff = cmp(near, oldPos)) && (dir < 0 ? diff < 0 : diff > 0))
-          { return skipAtomicInner(doc, near, pos, dir, mayClear) }
-      }
-
-      var far = m.find(dir < 0 ? -1 : 1);
-      if (dir < 0 ? m.inclusiveLeft : m.inclusiveRight)
-        { far = movePos(doc, far, dir, far.line == pos.line ? line : null); }
-      return far ? skipAtomicInner(doc, far, pos, dir, mayClear) : null
-    }
-  } }
-  return pos
-}
-
-// Ensure a given position is not inside an atomic range.
-function skipAtomic(doc, pos, oldPos, bias, mayClear) {
-  var dir = bias || 1;
-  var found = skipAtomicInner(doc, pos, oldPos, dir, mayClear) ||
-      (!mayClear && skipAtomicInner(doc, pos, oldPos, dir, true)) ||
-      skipAtomicInner(doc, pos, oldPos, -dir, mayClear) ||
-      (!mayClear && skipAtomicInner(doc, pos, oldPos, -dir, true));
-  if (!found) {
-    doc.cantEdit = true;
-    return Pos(doc.first, 0)
-  }
-  return found
-}
-
-function movePos(doc, pos, dir, line) {
-  if (dir < 0 && pos.ch == 0) {
-    if (pos.line > doc.first) { return clipPos(doc, Pos(pos.line - 1)) }
-    else { return null }
-  } else if (dir > 0 && pos.ch == (line || getLine(doc, pos.line)).text.length) {
-    if (pos.line < doc.first + doc.size - 1) { return Pos(pos.line + 1, 0) }
-    else { return null }
-  } else {
-    return new Pos(pos.line, pos.ch + dir)
-  }
-}
-
-function selectAll(cm) {
-  cm.setSelection(Pos(cm.firstLine(), 0), Pos(cm.lastLine()), sel_dontScroll);
-}
-
-// UPDATING
-
-// Allow "beforeChange" event handlers to influence a change
-function filterChange(doc, change, update) {
-  var obj = {
-    canceled: false,
-    from: change.from,
-    to: change.to,
-    text: change.text,
-    origin: change.origin,
-    cancel: function () { return obj.canceled = true; }
-  };
-  if (update) { obj.update = function (from, to, text, origin) {
-    if (from) { obj.from = clipPos(doc, from); }
-    if (to) { obj.to = clipPos(doc, to); }
-    if (text) { obj.text = text; }
-    if (origin !== undefined) { obj.origin = origin; }
-  }; }
-  signal(doc, "beforeChange", doc, obj);
-  if (doc.cm) { signal(doc.cm, "beforeChange", doc.cm, obj); }
-
-  if (obj.canceled) { return null }
-  return {from: obj.from, to: obj.to, text: obj.text, origin: obj.origin}
-}
-
-// Apply a change to a document, and add it to the document's
-// history, and propagating it to all linked documents.
-function makeChange(doc, change, ignoreReadOnly) {
-  if (doc.cm) {
-    if (!doc.cm.curOp) { return operation(doc.cm, makeChange)(doc, change, ignoreReadOnly) }
-    if (doc.cm.state.suppressEdits) { return }
-  }
-
-  if (hasHandler(doc, "beforeChange") || doc.cm && hasHandler(doc.cm, "beforeChange")) {
-    change = filterChange(doc, change, true);
-    if (!change) { return }
-  }
-
-  // Possibly split or suppress the update based on the presence
-  // of read-only spans in its range.
-  var split = sawReadOnlySpans && !ignoreReadOnly && removeReadOnlyRanges(doc, change.from, change.to);
-  if (split) {
-    for (var i = split.length - 1; i >= 0; --i)
-      { makeChangeInner(doc, {from: split[i].from, to: split[i].to, text: i ? [""] : change.text, origin: change.origin}); }
-  } else {
-    makeChangeInner(doc, change);
-  }
-}
-
-function makeChangeInner(doc, change) {
-  if (change.text.length == 1 && change.text[0] == "" && cmp(change.from, change.to) == 0) { return }
-  var selAfter = computeSelAfterChange(doc, change);
-  addChangeToHistory(doc, change, selAfter, doc.cm ? doc.cm.curOp.id : NaN);
-
-  makeChangeSingleDoc(doc, change, selAfter, stretchSpansOverChange(doc, change));
-  var rebased = [];
-
-  linkedDocs(doc, function (doc, sharedHist) {
-    if (!sharedHist && indexOf(rebased, doc.history) == -1) {
-      rebaseHist(doc.history, change);
-      rebased.push(doc.history);
-    }
-    makeChangeSingleDoc(doc, change, null, stretchSpansOverChange(doc, change));
-  });
-}
-
-// Revert a change stored in a document's history.
-function makeChangeFromHistory(doc, type, allowSelectionOnly) {
-  var suppress = doc.cm && doc.cm.state.suppressEdits;
-  if (suppress && !allowSelectionOnly) { return }
-
-  var hist = doc.history, event, selAfter = doc.sel;
-  var source = type == "undo" ? hist.done : hist.undone, dest = type == "undo" ? hist.undone : hist.done;
-
-  // Verify that there is a useable event (so that ctrl-z won't
-  // needlessly clear selection events)
-  var i = 0;
-  for (; i < source.length; i++) {
-    event = source[i];
-    if (allowSelectionOnly ? event.ranges && !event.equals(doc.sel) : !event.ranges)
-      { break }
-  }
-  if (i == source.length) { return }
-  hist.lastOrigin = hist.lastSelOrigin = null;
-
-  for (;;) {
-    event = source.pop();
-    if (event.ranges) {
-      pushSelectionToHistory(event, dest);
-      if (allowSelectionOnly && !event.equals(doc.sel)) {
-        setSelection(doc, event, {clearRedo: false});
-        return
-      }
-      selAfter = event;
-    } else if (suppress) {
-      source.push(event);
-      return
-    } else { break }
-  }
-
-  // Build up a reverse change object to add to the opposite history
-  // stack (redo when undoing, and vice versa).
-  var antiChanges = [];
-  pushSelectionToHistory(selAfter, dest);
-  dest.push({changes: antiChanges, generation: hist.generation});
-  hist.generation = event.generation || ++hist.maxGeneration;
-
-  var filter = hasHandler(doc, "beforeChange") || doc.cm && hasHandler(doc.cm, "beforeChange");
-
-  var loop = function ( i ) {
-    var change = event.changes[i];
-    change.origin = type;
-    if (filter && !filterChange(doc, change, false)) {
-      source.length = 0;
-      return {}
-    }
-
-    antiChanges.push(historyChangeFromChange(doc, change));
-
-    var after = i ? computeSelAfterChange(doc, change) : lst(source);
-    makeChangeSingleDoc(doc, change, after, mergeOldSpans(doc, change));
-    if (!i && doc.cm) { doc.cm.scrollIntoView({from: change.from, to: changeEnd(change)}); }
-    var rebased = [];
-
-    // Propagate to the linked documents
-    linkedDocs(doc, function (doc, sharedHist) {
-      if (!sharedHist && indexOf(rebased, doc.history) == -1) {
-        rebaseHist(doc.history, change);
-        rebased.push(doc.history);
-      }
-      makeChangeSingleDoc(doc, change, null, mergeOldSpans(doc, change));
-    });
-  };
-
-  for (var i$1 = event.changes.length - 1; i$1 >= 0; --i$1) {
-    var returned = loop( i$1 );
-
-    if ( returned ) return returned.v;
-  }
-}
-
-// Sub-views need their line numbers shifted when text is added
-// above or below them in the parent document.
-function shiftDoc(doc, distance) {
-  if (distance == 0) { return }
-  doc.first += distance;
-  doc.sel = new Selection(map(doc.sel.ranges, function (range) { return new Range(
-    Pos(range.anchor.line + distance, range.anchor.ch),
-    Pos(range.head.line + distance, range.head.ch)
-  ); }), doc.sel.primIndex);
-  if (doc.cm) {
-    regChange(doc.cm, doc.first, doc.first - distance, distance);
-    for (var d = doc.cm.display, l = d.viewFrom; l < d.viewTo; l++)
-      { regLineChange(doc.cm, l, "gutter"); }
-  }
-}
-
-// More lower-level change function, handling only a single document
-// (not linked ones).
-function makeChangeSingleDoc(doc, change, selAfter, spans) {
-  if (doc.cm && !doc.cm.curOp)
-    { return operation(doc.cm, makeChangeSingleDoc)(doc, change, selAfter, spans) }
-
-  if (change.to.line < doc.first) {
-    shiftDoc(doc, change.text.length - 1 - (change.to.line - change.from.line));
-    return
-  }
-  if (change.from.line > doc.lastLine()) { return }
-
-  // Clip the change to the size of this doc
-  if (change.from.line < doc.first) {
-    var shift = change.text.length - 1 - (doc.first - change.from.line);
-    shiftDoc(doc, shift);
-    change = {from: Pos(doc.first, 0), to: Pos(change.to.line + shift, change.to.ch),
-              text: [lst(change.text)], origin: change.origin};
-  }
-  var last = doc.lastLine();
-  if (change.to.line > last) {
-    change = {from: change.from, to: Pos(last, getLine(doc, last).text.length),
-              text: [change.text[0]], origin: change.origin};
-  }
-
-  change.removed = getBetween(doc, change.from, change.to);
-
-  if (!selAfter) { selAfter = computeSelAfterChange(doc, change); }
-  if (doc.cm) { makeChangeSingleDocInEditor(doc.cm, change, spans); }
-  else { updateDoc(doc, change, spans); }
-  setSelectionNoUndo(doc, selAfter, sel_dontScroll);
-}
-
-// Handle the interaction of a change to a document with the editor
-// that this document is part of.
-function makeChangeSingleDocInEditor(cm, change, spans) {
-  var doc = cm.doc, display = cm.display, from = change.from, to = change.to;
-
-  var recomputeMaxLength = false, checkWidthStart = from.line;
-  if (!cm.options.lineWrapping) {
-    checkWidthStart = lineNo(visualLine(getLine(doc, from.line)));
-    doc.iter(checkWidthStart, to.line + 1, function (line) {
-      if (line == display.maxLine) {
-        recomputeMaxLength = true;
-        return true
-      }
-    });
-  }
-
-  if (doc.sel.contains(change.from, change.to) > -1)
-    { signalCursorActivity(cm); }
-
-  updateDoc(doc, change, spans, estimateHeight(cm));
-
-  if (!cm.options.lineWrapping) {
-    doc.iter(checkWidthStart, from.line + change.text.length, function (line) {
-      var len = lineLength(line);
-      if (len > display.maxLineLength) {
-        display.maxLine = line;
-        display.maxLineLength = len;
-        display.maxLineChanged = true;
-        recomputeMaxLength = false;
-      }
-    });
-    if (recomputeMaxLength) { cm.curOp.updateMaxLine = true; }
-  }
-
-  retreatFrontier(doc, from.line);
-  startWorker(cm, 400);
-
-  var lendiff = change.text.length - (to.line - from.line) - 1;
-  // Remember that these lines changed, for updating the display
-  if (change.full)
-    { regChange(cm); }
-  else if (from.line == to.line && change.text.length == 1 && !isWholeLineUpdate(cm.doc, change))
-    { regLineChange(cm, from.line, "text"); }
-  else
-    { regChange(cm, from.line, to.line + 1, lendiff); }
-
-  var changesHandler = hasHandler(cm, "changes"), changeHandler = hasHandler(cm, "change");
-  if (changeHandler || changesHandler) {
-    var obj = {
-      from: from, to: to,
-      text: change.text,
-      removed: change.removed,
-      origin: change.origin
-    };
-    if (changeHandler) { signalLater(cm, "change", cm, obj); }
-    if (changesHandler) { (cm.curOp.changeObjs || (cm.curOp.changeObjs = [])).push(obj); }
-  }
-  cm.display.selForContextMenu = null;
-}
-
-function replaceRange(doc, code, from, to, origin) {
-  if (!to) { to = from; }
-  if (cmp(to, from) < 0) { var assign;
-    (assign = [to, from], from = assign[0], to = assign[1]); }
-  if (typeof code == "string") { code = doc.splitLines(code); }
-  makeChange(doc, {from: from, to: to, text: code, origin: origin});
-}
-
-// Rebasing/resetting history to deal with externally-sourced changes
-
-function rebaseHistSelSingle(pos, from, to, diff) {
-  if (to < pos.line) {
-    pos.line += diff;
-  } else if (from < pos.line) {
-    pos.line = from;
-    pos.ch = 0;
-  }
-}
-
-// Tries to rebase an array of history events given a change in the
-// document. If the change touches the same lines as the event, the
-// event, and everything 'behind' it, is discarded. If the change is
-// before the event, the event's positions are updated. Uses a
-// copy-on-write scheme for the positions, to avoid having to
-// reallocate them all on every rebase, but also avoid problems with
-// shared position objects being unsafely updated.
-function rebaseHistArray(array, from, to, diff) {
-  for (var i = 0; i < array.length; ++i) {
-    var sub = array[i], ok = true;
-    if (sub.ranges) {
-      if (!sub.copied) { sub = array[i] = sub.deepCopy(); sub.copied = true; }
-      for (var j = 0; j < sub.ranges.length; j++) {
-        rebaseHistSelSingle(sub.ranges[j].anchor, from, to, diff);
-        rebaseHistSelSingle(sub.ranges[j].head, from, to, diff);
-      }
-      continue
-    }
-    for (var j$1 = 0; j$1 < sub.changes.length; ++j$1) {
-      var cur = sub.changes[j$1];
-      if (to < cur.from.line) {
-        cur.from = Pos(cur.from.line + diff, cur.from.ch);
-        cur.to = Pos(cur.to.line + diff, cur.to.ch);
-      } else if (from <= cur.to.line) {
-        ok = false;
-        break
-      }
-    }
-    if (!ok) {
-      array.splice(0, i + 1);
-      i = 0;
-    }
-  }
-}
-
-function rebaseHist(hist, change) {
-  var from = change.from.line, to = change.to.line, diff = change.text.length - (to - from) - 1;
-  rebaseHistArray(hist.done, from, to, diff);
-  rebaseHistArray(hist.undone, from, to, diff);
-}
-
-// Utility for applying a change to a line by handle or number,
-// returning the number and optionally registering the line as
-// changed.
-function changeLine(doc, handle, changeType, op) {
-  var no = handle, line = handle;
-  if (typeof handle == "number") { line = getLine(doc, clipLine(doc, handle)); }
-  else { no = lineNo(handle); }
-  if (no == null) { return null }
-  if (op(line, no) && doc.cm) { regLineChange(doc.cm, no, changeType); }
-  return line
-}
-
-// The document is represented as a BTree consisting of leaves, with
-// chunk of lines in them, and branches, with up to ten leaves or
-// other branch nodes below them. The top node is always a branch
-// node, and is the document object itself (meaning it has
-// additional methods and properties).
-//
-// All nodes have parent links. The tree is used both to go from
-// line numbers to line objects, and to go from objects to numbers.
-// It also indexes by height, and is used to convert between height
-// and line object, and to find the total height of the document.
-//
-// See also http://marijnhaverbeke.nl/blog/codemirror-line-tree.html
-
-function LeafChunk(lines) {
-  var this$1 = this;
-
-  this.lines = lines;
-  this.parent = null;
-  var height = 0;
-  for (var i = 0; i < lines.length; ++i) {
-    lines[i].parent = this$1;
-    height += lines[i].height;
-  }
-  this.height = height;
-}
-
-LeafChunk.prototype = {
-  chunkSize: function() { return this.lines.length },
-
-  // Remove the n lines at offset 'at'.
-  removeInner: function(at, n) {
-    var this$1 = this;
-
-    for (var i = at, e = at + n; i < e; ++i) {
-      var line = this$1.lines[i];
-      this$1.height -= line.height;
-      cleanUpLine(line);
-      signalLater(line, "delete");
-    }
-    this.lines.splice(at, n);
-  },
-
-  // Helper used to collapse a small branch into a single leaf.
-  collapse: function(lines) {
-    lines.push.apply(lines, this.lines);
-  },
-
-  // Insert the given array of lines at offset 'at', count them as
-  // having the given height.
-  insertInner: function(at, lines, height) {
-    var this$1 = this;
-
-    this.height += height;
-    this.lines = this.lines.slice(0, at).concat(lines).concat(this.lines.slice(at));
-    for (var i = 0; i < lines.length; ++i) { lines[i].parent = this$1; }
-  },
-
-  // Used to iterate over a part of the tree.
-  iterN: function(at, n, op) {
-    var this$1 = this;
-
-    for (var e = at + n; at < e; ++at)
-      { if (op(this$1.lines[at])) { return true } }
-  }
-};
-
-function BranchChunk(children) {
-  var this$1 = this;
-
-  this.children = children;
-  var size = 0, height = 0;
-  for (var i = 0; i < children.length; ++i) {
-    var ch = children[i];
-    size += ch.chunkSize(); height += ch.height;
-    ch.parent = this$1;
-  }
-  this.size = size;
-  this.height = height;
-  this.parent = null;
-}
-
-BranchChunk.prototype = {
-  chunkSize: function() { return this.size },
-
-  removeInner: function(at, n) {
-    var this$1 = this;
-
-    this.size -= n;
-    for (var i = 0; i < this.children.length; ++i) {
-      var child = this$1.children[i], sz = child.chunkSize();
-      if (at < sz) {
-        var rm = Math.min(n, sz - at), oldHeight = child.height;
-        child.removeInner(at, rm);
-        this$1.height -= oldHeight - child.height;
-        if (sz == rm) { this$1.children.splice(i--, 1); child.parent = null; }
-        if ((n -= rm) == 0) { break }
-        at = 0;
-      } else { at -= sz; }
-    }
-    // If the result is smaller than 25 lines, ensure that it is a
-    // single leaf node.
-    if (this.size - n < 25 &&
-        (this.children.length > 1 || !(this.children[0] instanceof LeafChunk))) {
-      var lines = [];
-      this.collapse(lines);
-      this.children = [new LeafChunk(lines)];
-      this.children[0].parent = this;
-    }
-  },
-
-  collapse: function(lines) {
-    var this$1 = this;
-
-    for (var i = 0; i < this.children.length; ++i) { this$1.children[i].collapse(lines); }
-  },
-
-  insertInner: function(at, lines, height) {
-    var this$1 = this;
-
-    this.size += lines.length;
-    this.height += height;
-    for (var i = 0; i < this.children.length; ++i) {
-      var child = this$1.children[i], sz = child.chunkSize();
-      if (at <= sz) {
-        child.insertInner(at, lines, height);
-        if (child.lines && child.lines.length > 50) {
-          // To avoid memory thrashing when child.lines is huge (e.g. first view of a large file), it's never spliced.
-          // Instead, small slices are taken. They're taken in order because sequential memory accesses are fastest.
-          var remaining = child.lines.length % 25 + 25;
-          for (var pos = remaining; pos < child.lines.length;) {
-            var leaf = new LeafChunk(child.lines.slice(pos, pos += 25));
-            child.height -= leaf.height;
-            this$1.children.splice(++i, 0, leaf);
-            leaf.parent = this$1;
-          }
-          child.lines = child.lines.slice(0, remaining);
-          this$1.maybeSpill();
-        }
-        break
-      }
-      at -= sz;
-    }
-  },
-
-  // When a node has grown, check whether it should be split.
-  maybeSpill: function() {
-    if (this.children.length <= 10) { return }
-    var me = this;
-    do {
-      var spilled = me.children.splice(me.children.length - 5, 5);
-      var sibling = new BranchChunk(spilled);
-      if (!me.parent) { // Become the parent node
-        var copy = new BranchChunk(me.children);
-        copy.parent = me;
-        me.children = [copy, sibling];
-        me = copy;
-     } else {
-        me.size -= sibling.size;
-        me.height -= sibling.height;
-        var myIndex = indexOf(me.parent.children, me);
-        me.parent.children.splice(myIndex + 1, 0, sibling);
-      }
-      sibling.parent = me.parent;
-    } while (me.children.length > 10)
-    me.parent.maybeSpill();
-  },
-
-  iterN: function(at, n, op) {
-    var this$1 = this;
-
-    for (var i = 0; i < this.children.length; ++i) {
-      var child = this$1.children[i], sz = child.chunkSize();
-      if (at < sz) {
-        var used = Math.min(n, sz - at);
-        if (child.iterN(at, used, op)) { return true }
-        if ((n -= used) == 0) { break }
-        at = 0;
-      } else { at -= sz; }
-    }
-  }
-};
-
-// Line widgets are block elements displayed above or below a line.
-
-var LineWidget = function(doc, node, options) {
-  var this$1 = this;
-
-  if (options) { for (var opt in options) { if (options.hasOwnProperty(opt))
-    { this$1[opt] = options[opt]; } } }
-  this.doc = doc;
-  this.node = node;
-};
-
-LineWidget.prototype.clear = function () {
-    var this$1 = this;
-
-  var cm = this.doc.cm, ws = this.line.widgets, line = this.line, no = lineNo(line);
-  if (no == null || !ws) { return }
-  for (var i = 0; i < ws.length; ++i) { if (ws[i] == this$1) { ws.splice(i--, 1); } }
-  if (!ws.length) { line.widgets = null; }
-  var height = widgetHeight(this);
-  updateLineHeight(line, Math.max(0, line.height - height));
-  if (cm) {
-    runInOp(cm, function () {
-      adjustScrollWhenAboveVisible(cm, line, -height);
-      regLineChange(cm, no, "widget");
-    });
-    signalLater(cm, "lineWidgetCleared", cm, this, no);
-  }
-};
-
-LineWidget.prototype.changed = function () {
-    var this$1 = this;
-
-  var oldH = this.height, cm = this.doc.cm, line = this.line;
-  this.height = null;
-  var diff = widgetHeight(this) - oldH;
-  if (!diff) { return }
-  updateLineHeight(line, line.height + diff);
-  if (cm) {
-    runInOp(cm, function () {
-      cm.curOp.forceUpdate = true;
-      adjustScrollWhenAboveVisible(cm, line, diff);
-      signalLater(cm, "lineWidgetChanged", cm, this$1, lineNo(line));
-    });
-  }
-};
-eventMixin(LineWidget);
-
-function adjustScrollWhenAboveVisible(cm, line, diff) {
-  if (heightAtLine(line) < ((cm.curOp && cm.curOp.scrollTop) || cm.doc.scrollTop))
-    { addToScrollTop(cm, diff); }
-}
-
-function addLineWidget(doc, handle, node, options) {
-  var widget = new LineWidget(doc, node, options);
-  var cm = doc.cm;
-  if (cm && widget.noHScroll) { cm.display.alignWidgets = true; }
-  changeLine(doc, handle, "widget", function (line) {
-    var widgets = line.widgets || (line.widgets = []);
-    if (widget.insertAt == null) { widgets.push(widget); }
-    else { widgets.splice(Math.min(widgets.length - 1, Math.max(0, widget.insertAt)), 0, widget); }
-    widget.line = line;
-    if (cm && !lineIsHidden(doc, line)) {
-      var aboveVisible = heightAtLine(line) < doc.scrollTop;
-      updateLineHeight(line, line.height + widgetHeight(widget));
-      if (aboveVisible) { addToScrollTop(cm, widget.height); }
-      cm.curOp.forceUpdate = true;
-    }
-    return true
-  });
-  if (cm) { signalLater(cm, "lineWidgetAdded", cm, widget, typeof handle == "number" ? handle : lineNo(handle)); }
-  return widget
-}
-
-// TEXTMARKERS
-
-// Created with markText and setBookmark methods. A TextMarker is a
-// handle that can be used to clear or find a marked position in the
-// document. Line objects hold arrays (markedSpans) containing
-// {from, to, marker} object pointing to such marker objects, and
-// indicating that such a marker is present on that line. Multiple
-// lines may point to the same marker when it spans across lines.
-// The spans will have null for their from/to properties when the
-// marker continues beyond the start/end of the line. Markers have
-// links back to the lines they currently touch.
-
-// Collapsed markers have unique ids, in order to be able to order
-// them, which is needed for uniquely determining an outer marker
-// when they overlap (they may nest, but not partially overlap).
-var nextMarkerId = 0;
-
-var TextMarker = function(doc, type) {
-  this.lines = [];
-  this.type = type;
-  this.doc = doc;
-  this.id = ++nextMarkerId;
-};
-
-// Clear the marker.
-TextMarker.prototype.clear = function () {
-    var this$1 = this;
-
-  if (this.explicitlyCleared) { return }
-  var cm = this.doc.cm, withOp = cm && !cm.curOp;
-  if (withOp) { startOperation(cm); }
-  if (hasHandler(this, "clear")) {
-    var found = this.find();
-    if (found) { signalLater(this, "clear", found.from, found.to); }
-  }
-  var min = null, max = null;
-  for (var i = 0; i < this.lines.length; ++i) {
-    var line = this$1.lines[i];
-    var span = getMarkedSpanFor(line.markedSpans, this$1);
-    if (cm && !this$1.collapsed) { regLineChange(cm, lineNo(line), "text"); }
-    else if (cm) {
-      if (span.to != null) { max = lineNo(line); }
-      if (span.from != null) { min = lineNo(line); }
-    }
-    line.markedSpans = removeMarkedSpan(line.markedSpans, span);
-    if (span.from == null && this$1.collapsed && !lineIsHidden(this$1.doc, line) && cm)
-      { updateLineHeight(line, textHeight(cm.display)); }
-  }
-  if (cm && this.collapsed && !cm.options.lineWrapping) { for (var i$1 = 0; i$1 < this.lines.length; ++i$1) {
-    var visual = visualLine(this$1.lines[i$1]), len = lineLength(visual);
-    if (len > cm.display.maxLineLength) {
-      cm.display.maxLine = visual;
-      cm.display.maxLineLength = len;
-      cm.display.maxLineChanged = true;
-    }
-  } }
-
-  if (min != null && cm && this.collapsed) { regChange(cm, min, max + 1); }
-  this.lines.length = 0;
-  this.explicitlyCleared = true;
-  if (this.atomic && this.doc.cantEdit) {
-    this.doc.cantEdit = false;
-    if (cm) { reCheckSelection(cm.doc); }
-  }
-  if (cm) { signalLater(cm, "markerCleared", cm, this, min, max); }
-  if (withOp) { endOperation(cm); }
-  if (this.parent) { this.parent.clear(); }
-};
-
-// Find the position of the marker in the document. Returns a {from,
-// to} object by default. Side can be passed to get a specific side
-// -- 0 (both), -1 (left), or 1 (right). When lineObj is true, the
-// Pos objects returned contain a line object, rather than a line
-// number (used to prevent looking up the same line twice).
-TextMarker.prototype.find = function (side, lineObj) {
-    var this$1 = this;
-
-  if (side == null && this.type == "bookmark") { side = 1; }
-  var from, to;
-  for (var i = 0; i < this.lines.length; ++i) {
-    var line = this$1.lines[i];
-    var span = getMarkedSpanFor(line.markedSpans, this$1);
-    if (span.from != null) {
-      from = Pos(lineObj ? line : lineNo(line), span.from);
-      if (side == -1) { return from }
-    }
-    if (span.to != null) {
-      to = Pos(lineObj ? line : lineNo(line), span.to);
-      if (side == 1) { return to }
-    }
-  }
-  return from && {from: from, to: to}
-};
-
-// Signals that the marker's widget changed, and surrounding layout
-// should be recomputed.
-TextMarker.prototype.changed = function () {
-    var this$1 = this;
-
-  var pos = this.find(-1, true), widget = this, cm = this.doc.cm;
-  if (!pos || !cm) { return }
-  runInOp(cm, function () {
-    var line = pos.line, lineN = lineNo(pos.line);
-    var view = findViewForLine(cm, lineN);
-    if (view) {
-      clearLineMeasurementCacheFor(view);
-      cm.curOp.selectionChanged = cm.curOp.forceUpdate = true;
-    }
-    cm.curOp.updateMaxLine = true;
-    if (!lineIsHidden(widget.doc, line) && widget.height != null) {
-      var oldHeight = widget.height;
-      widget.height = null;
-      var dHeight = widgetHeight(widget) - oldHeight;
-      if (dHeight)
-        { updateLineHeight(line, line.height + dHeight); }
-    }
-    signalLater(cm, "markerChanged", cm, this$1);
-  });
-};
-
-TextMarker.prototype.attachLine = function (line) {
-  if (!this.lines.length && this.doc.cm) {
-    var op = this.doc.cm.curOp;
-    if (!op.maybeHiddenMarkers || indexOf(op.maybeHiddenMarkers, this) == -1)
-      { (op.maybeUnhiddenMarkers || (op.maybeUnhiddenMarkers = [])).push(this); }
-  }
-  this.lines.push(line);
-};
-
-TextMarker.prototype.detachLine = function (line) {
-  this.lines.splice(indexOf(this.lines, line), 1);
-  if (!this.lines.length && this.doc.cm) {
-    var op = this.doc.cm.curOp;(op.maybeHiddenMarkers || (op.maybeHiddenMarkers = [])).push(this);
-  }
-};
-eventMixin(TextMarker);
-
-// Create a marker, wire it up to the right lines, and
-function markText(doc, from, to, options, type) {
-  // Shared markers (across linked documents) are handled separately
-  // (markTextShared will call out to this again, once per
-  // document).
-  if (options && options.shared) { return markTextShared(doc, from, to, options, type) }
-  // Ensure we are in an operation.
-  if (doc.cm && !doc.cm.curOp) { return operation(doc.cm, markText)(doc, from, to, options, type) }
-
-  var marker = new TextMarker(doc, type), diff = cmp(from, to);
-  if (options) { copyObj(options, marker, false); }
-  // Don't connect empty markers unless clearWhenEmpty is false
-  if (diff > 0 || diff == 0 && marker.clearWhenEmpty !== false)
-    { return marker }
-  if (marker.replacedWith) {
-    // Showing up as a widget implies collapsed (widget replaces text)
-    marker.collapsed = true;
-    marker.widgetNode = eltP("span", [marker.replacedWith], "CodeMirror-widget");
-    if (!options.handleMouseEvents) { marker.widgetNode.setAttribute("cm-ignore-events", "true"); }
-    if (options.insertLeft) { marker.widgetNode.insertLeft = true; }
-  }
-  if (marker.collapsed) {
-    if (conflictingCollapsedRange(doc, from.line, from, to, marker) ||
-        from.line != to.line && conflictingCollapsedRange(doc, to.line, from, to, marker))
-      { throw new Error("Inserting collapsed marker partially overlapping an existing one") }
-    seeCollapsedSpans();
-  }
-
-  if (marker.addToHistory)
-    { addChangeToHistory(doc, {from: from, to: to, origin: "markText"}, doc.sel, NaN); }
-
-  var curLine = from.line, cm = doc.cm, updateMaxLine;
-  doc.iter(curLine, to.line + 1, function (line) {
-    if (cm && marker.collapsed && !cm.options.lineWrapping && visualLine(line) == cm.display.maxLine)
-      { updateMaxLine = true; }
-    if (marker.collapsed && curLine != from.line) { updateLineHeight(line, 0); }
-    addMarkedSpan(line, new MarkedSpan(marker,
-                                       curLine == from.line ? from.ch : null,
-                                       curLine == to.line ? to.ch : null));
-    ++curLine;
-  });
-  // lineIsHidden depends on the presence of the spans, so needs a second pass
-  if (marker.collapsed) { doc.iter(from.line, to.line + 1, function (line) {
-    if (lineIsHidden(doc, line)) { updateLineHeight(line, 0); }
-  }); }
-
-  if (marker.clearOnEnter) { on(marker, "beforeCursorEnter", function () { return marker.clear(); }); }
-
-  if (marker.readOnly) {
-    seeReadOnlySpans();
-    if (doc.history.done.length || doc.history.undone.length)
-      { doc.clearHistory(); }
-  }
-  if (marker.collapsed) {
-    marker.id = ++nextMarkerId;
-    marker.atomic = true;
-  }
-  if (cm) {
-    // Sync editor state
-    if (updateMaxLine) { cm.curOp.updateMaxLine = true; }
-    if (marker.collapsed)
-      { regChange(cm, from.line, to.line + 1); }
-    else if (marker.className || marker.title || marker.startStyle || marker.endStyle || marker.css)
-      { for (var i = from.line; i <= to.line; i++) { regLineChange(cm, i, "text"); } }
-    if (marker.atomic) { reCheckSelection(cm.doc); }
-    signalLater(cm, "markerAdded", cm, marker);
-  }
-  return marker
-}
-
-// SHARED TEXTMARKERS
-
-// A shared marker spans multiple linked documents. It is
-// implemented as a meta-marker-object controlling multiple normal
-// markers.
-var SharedTextMarker = function(markers, primary) {
-  var this$1 = this;
-
-  this.markers = markers;
-  this.primary = primary;
-  for (var i = 0; i < markers.length; ++i)
-    { markers[i].parent = this$1; }
-};
-
-SharedTextMarker.prototype.clear = function () {
-    var this$1 = this;
-
-  if (this.explicitlyCleared) { return }
-  this.explicitlyCleared = true;
-  for (var i = 0; i < this.markers.length; ++i)
-    { this$1.markers[i].clear(); }
-  signalLater(this, "clear");
-};
-
-SharedTextMarker.prototype.find = function (side, lineObj) {
-  return this.primary.find(side, lineObj)
-};
-eventMixin(SharedTextMarker);
-
-function markTextShared(doc, from, to, options, type) {
-  options = copyObj(options);
-  options.shared = false;
-  var markers = [markText(doc, from, to, options, type)], primary = markers[0];
-  var widget = options.widgetNode;
-  linkedDocs(doc, function (doc) {
-    if (widget) { options.widgetNode = widget.cloneNode(true); }
-    markers.push(markText(doc, clipPos(doc, from), clipPos(doc, to), options, type));
-    for (var i = 0; i < doc.linked.length; ++i)
-      { if (doc.linked[i].isParent) { return } }
-    primary = lst(markers);
-  });
-  return new SharedTextMarker(markers, primary)
-}
-
-function findSharedMarkers(doc) {
-  return doc.findMarks(Pos(doc.first, 0), doc.clipPos(Pos(doc.lastLine())), function (m) { return m.parent; })
-}
-
-function copySharedMarkers(doc, markers) {
-  for (var i = 0; i < markers.length; i++) {
-    var marker = markers[i], pos = marker.find();
-    var mFrom = doc.clipPos(pos.from), mTo = doc.clipPos(pos.to);
-    if (cmp(mFrom, mTo)) {
-      var subMark = markText(doc, mFrom, mTo, marker.primary, marker.primary.type);
-      marker.markers.push(subMark);
-      subMark.parent = marker;
-    }
-  }
-}
-
-function detachSharedMarkers(markers) {
-  var loop = function ( i ) {
-    var marker = markers[i], linked = [marker.primary.doc];
-    linkedDocs(marker.primary.doc, function (d) { return linked.push(d); });
-    for (var j = 0; j < marker.markers.length; j++) {
-      var subMarker = marker.markers[j];
-      if (indexOf(linked, subMarker.doc) == -1) {
-        subMarker.parent = null;
-        marker.markers.splice(j--, 1);
-      }
-    }
-  };
-
-  for (var i = 0; i < markers.length; i++) loop( i );
-}
-
-var nextDocId = 0;
-var Doc = function(text, mode, firstLine, lineSep, direction) {
-  if (!(this instanceof Doc)) { return new Doc(text, mode, firstLine, lineSep, direction) }
-  if (firstLine == null) { firstLine = 0; }
-
-  BranchChunk.call(this, [new LeafChunk([new Line("", null)])]);
-  this.first = firstLine;
-  this.scrollTop = this.scrollLeft = 0;
-  this.cantEdit = false;
-  this.cleanGeneration = 1;
-  this.modeFrontier = this.highlightFrontier = firstLine;
-  var start = Pos(firstLine, 0);
-  this.sel = simpleSelection(start);
-  this.history = new History(null);
-  this.id = ++nextDocId;
-  this.modeOption = mode;
-  this.lineSep = lineSep;
-  this.direction = (direction == "rtl") ? "rtl" : "ltr";
-  this.extend = false;
-
-  if (typeof text == "string") { text = this.splitLines(text); }
-  updateDoc(this, {from: start, to: start, text: text});
-  setSelection(this, simpleSelection(start), sel_dontScroll);
-};
-
-Doc.prototype = createObj(BranchChunk.prototype, {
-  constructor: Doc,
-  // Iterate over the document. Supports two forms -- with only one
-  // argument, it calls that for each line in the document. With
-  // three, it iterates over the range given by the first two (with
-  // the second being non-inclusive).
-  iter: function(from, to, op) {
-    if (op) { this.iterN(from - this.first, to - from, op); }
-    else { this.iterN(this.first, this.first + this.size, from); }
-  },
-
-  // Non-public interface for adding and removing lines.
-  insert: function(at, lines) {
-    var height = 0;
-    for (var i = 0; i < lines.length; ++i) { height += lines[i].height; }
-    this.insertInner(at - this.first, lines, height);
-  },
-  remove: function(at, n) { this.removeInner(at - this.first, n); },
-
-  // From here, the methods are part of the public interface. Most
-  // are also available from CodeMirror (editor) instances.
-
-  getValue: function(lineSep) {
-    var lines = getLines(this, this.first, this.first + this.size);
-    if (lineSep === false) { return lines }
-    return lines.join(lineSep || this.lineSeparator())
-  },
-  setValue: docMethodOp(function(code) {
-    var top = Pos(this.first, 0), last = this.first + this.size - 1;
-    makeChange(this, {from: top, to: Pos(last, getLine(this, last).text.length),
-                      text: this.splitLines(code), origin: "setValue", full: true}, true);
-    if (this.cm) { scrollToCoords(this.cm, 0, 0); }
-    setSelection(this, simpleSelection(top), sel_dontScroll);
-  }),
-  replaceRange: function(code, from, to, origin) {
-    from = clipPos(this, from);
-    to = to ? clipPos(this, to) : from;
-    replaceRange(this, code, from, to, origin);
-  },
-  getRange: function(from, to, lineSep) {
-    var lines = getBetween(this, clipPos(this, from), clipPos(this, to));
-    if (lineSep === false) { return lines }
-    return lines.join(lineSep || this.lineSeparator())
-  },
-
-  getLine: function(line) {var l = this.getLineHandle(line); return l && l.text},
-
-  getLineHandle: function(line) {if (isLine(this, line)) { return getLine(this, line) }},
-  getLineNumber: function(line) {return lineNo(line)},
-
-  getLineHandleVisualStart: function(line) {
-    if (typeof line == "number") { line = getLine(this, line); }
-    return visualLine(line)
-  },
-
-  lineCount: function() {return this.size},
-  firstLine: function() {return this.first},
-  lastLine: function() {return this.first + this.size - 1},
-
-  clipPos: function(pos) {return clipPos(this, pos)},
-
-  getCursor: function(start) {
-    var range$$1 = this.sel.primary(), pos;
-    if (start == null || start == "head") { pos = range$$1.head; }
-    else if (start == "anchor") { pos = range$$1.anchor; }
-    else if (start == "end" || start == "to" || start === false) { pos = range$$1.to(); }
-    else { pos = range$$1.from(); }
-    return pos
-  },
-  listSelections: function() { return this.sel.ranges },
-  somethingSelected: function() {return this.sel.somethingSelected()},
-
-  setCursor: docMethodOp(function(line, ch, options) {
-    setSimpleSelection(this, clipPos(this, typeof line == "number" ? Pos(line, ch || 0) : line), null, options);
-  }),
-  setSelection: docMethodOp(function(anchor, head, options) {
-    setSimpleSelection(this, clipPos(this, anchor), clipPos(this, head || anchor), options);
-  }),
-  extendSelection: docMethodOp(function(head, other, options) {
-    extendSelection(this, clipPos(this, head), other && clipPos(this, other), options);
-  }),
-  extendSelections: docMethodOp(function(heads, options) {
-    extendSelections(this, clipPosArray(this, heads), options);
-  }),
-  extendSelectionsBy: docMethodOp(function(f, options) {
-    var heads = map(this.sel.ranges, f);
-    extendSelections(this, clipPosArray(this, heads), options);
-  }),
-  setSelections: docMethodOp(function(ranges, primary, options) {
-    var this$1 = this;
-
-    if (!ranges.length) { return }
-    var out = [];
-    for (var i = 0; i < ranges.length; i++)
-      { out[i] = new Range(clipPos(this$1, ranges[i].anchor),
-                         clipPos(this$1, ranges[i].head)); }
-    if (primary == null) { primary = Math.min(ranges.length - 1, this.sel.primIndex); }
-    setSelection(this, normalizeSelection(out, primary), options);
-  }),
-  addSelection: docMethodOp(function(anchor, head, options) {
-    var ranges = this.sel.ranges.slice(0);
-    ranges.push(new Range(clipPos(this, anchor), clipPos(this, head || anchor)));
-    setSelection(this, normalizeSelection(ranges, ranges.length - 1), options);
-  }),
-
-  getSelection: function(lineSep) {
-    var this$1 = this;
-
-    var ranges = this.sel.ranges, lines;
-    for (var i = 0; i < ranges.length; i++) {
-      var sel = getBetween(this$1, ranges[i].from(), ranges[i].to());
-      lines = lines ? lines.concat(sel) : sel;
-    }
-    if (lineSep === false) { return lines }
-    else { return lines.join(lineSep || this.lineSeparator()) }
-  },
-  getSelections: function(lineSep) {
-    var this$1 = this;
-
-    var parts = [], ranges = this.sel.ranges;
-    for (var i = 0; i < ranges.length; i++) {
-      var sel = getBetween(this$1, ranges[i].from(), ranges[i].to());
-      if (lineSep !== false) { sel = sel.join(lineSep || this$1.lineSeparator()); }
-      parts[i] = sel;
-    }
-    return parts
-  },
-  replaceSelection: function(code, collapse, origin) {
-    var dup = [];
-    for (var i = 0; i < this.sel.ranges.length; i++)
-      { dup[i] = code; }
-    this.replaceSelections(dup, collapse, origin || "+input");
-  },
-  replaceSelections: docMethodOp(function(code, collapse, origin) {
-    var this$1 = this;
-
-    var changes = [], sel = this.sel;
-    for (var i = 0; i < sel.ranges.length; i++) {
-      var range$$1 = sel.ranges[i];
-      changes[i] = {from: range$$1.from(), to: range$$1.to(), text: this$1.splitLines(code[i]), origin: origin};
-    }
-    var newSel = collapse && collapse != "end" && computeReplacedSel(this, changes, collapse);
-    for (var i$1 = changes.length - 1; i$1 >= 0; i$1--)
-      { makeChange(this$1, changes[i$1]); }
-    if (newSel) { setSelectionReplaceHistory(this, newSel); }
-    else if (this.cm) { ensureCursorVisible(this.cm); }
-  }),
-  undo: docMethodOp(function() {makeChangeFromHistory(this, "undo");}),
-  redo: docMethodOp(function() {makeChangeFromHistory(this, "redo");}),
-  undoSelection: docMethodOp(function() {makeChangeFromHistory(this, "undo", true);}),
-  redoSelection: docMethodOp(function() {makeChangeFromHistory(this, "redo", true);}),
-
-  setExtending: function(val) {this.extend = val;},
-  getExtending: function() {return this.extend},
-
-  historySize: function() {
-    var hist = this.history, done = 0, undone = 0;
-    for (var i = 0; i < hist.done.length; i++) { if (!hist.done[i].ranges) { ++done; } }
-    for (var i$1 = 0; i$1 < hist.undone.length; i$1++) { if (!hist.undone[i$1].ranges) { ++undone; } }
-    return {undo: done, redo: undone}
-  },
-  clearHistory: function() {this.history = new History(this.history.maxGeneration);},
-
-  markClean: function() {
-    this.cleanGeneration = this.changeGeneration(true);
-  },
-  changeGeneration: function(forceSplit) {
-    if (forceSplit)
-      { this.history.lastOp = this.history.lastSelOp = this.history.lastOrigin = null; }
-    return this.history.generation
-  },
-  isClean: function (gen) {
-    return this.history.generation == (gen || this.cleanGeneration)
-  },
-
-  getHistory: function() {
-    return {done: copyHistoryArray(this.history.done),
-            undone: copyHistoryArray(this.history.undone)}
-  },
-  setHistory: function(histData) {
-    var hist = this.history = new History(this.history.maxGeneration);
-    hist.done = copyHistoryArray(histData.done.slice(0), null, true);
-    hist.undone = copyHistoryArray(histData.undone.slice(0), null, true);
-  },
-
-  setGutterMarker: docMethodOp(function(line, gutterID, value) {
-    return changeLine(this, line, "gutter", function (line) {
-      var markers = line.gutterMarkers || (line.gutterMarkers = {});
-      markers[gutterID] = value;
-      if (!value && isEmpty(markers)) { line.gutterMarkers = null; }
-      return true
-    })
-  }),
-
-  clearGutter: docMethodOp(function(gutterID) {
-    var this$1 = this;
-
-    this.iter(function (line) {
-      if (line.gutterMarkers && line.gutterMarkers[gutterID]) {
-        changeLine(this$1, line, "gutter", function () {
-          line.gutterMarkers[gutterID] = null;
-          if (isEmpty(line.gutterMarkers)) { line.gutterMarkers = null; }
-          return true
-        });
-      }
-    });
-  }),
-
-  lineInfo: function(line) {
-    var n;
-    if (typeof line == "number") {
-      if (!isLine(this, line)) { return null }
-      n = line;
-      line = getLine(this, line);
-      if (!line) { return null }
-    } else {
-      n = lineNo(line);
-      if (n == null) { return null }
-    }
-    return {line: n, handle: line, text: line.text, gutterMarkers: line.gutterMarkers,
-            textClass: line.textClass, bgClass: line.bgClass, wrapClass: line.wrapClass,
-            widgets: line.widgets}
-  },
-
-  addLineClass: docMethodOp(function(handle, where, cls) {
-    return changeLine(this, handle, where == "gutter" ? "gutter" : "class", function (line) {
-      var prop = where == "text" ? "textClass"
-               : where == "background" ? "bgClass"
-               : where == "gutter" ? "gutterClass" : "wrapClass";
-      if (!line[prop]) { line[prop] = cls; }
-      else if (classTest(cls).test(line[prop])) { return false }
-      else { line[prop] += " " + cls; }
-      return true
-    })
-  }),
-  removeLineClass: docMethodOp(function(handle, where, cls) {
-    return changeLine(this, handle, where == "gutter" ? "gutter" : "class", function (line) {
-      var prop = where == "text" ? "textClass"
-               : where == "background" ? "bgClass"
-               : where == "gutter" ? "gutterClass" : "wrapClass";
-      var cur = line[prop];
-      if (!cur) { return false }
-      else if (cls == null) { line[prop] = null; }
-      else {
-        var found = cur.match(classTest(cls));
-        if (!found) { return false }
-        var end = found.index + found[0].length;
-        line[prop] = cur.slice(0, found.index) + (!found.index || end == cur.length ? "" : " ") + cur.slice(end) || null;
-      }
-      return true
-    })
-  }),
-
-  addLineWidget: docMethodOp(function(handle, node, options) {
-    return addLineWidget(this, handle, node, options)
-  }),
-  removeLineWidget: function(widget) { widget.clear(); },
-
-  markText: function(from, to, options) {
-    return markText(this, clipPos(this, from), clipPos(this, to), options, options && options.type || "range")
-  },
-  setBookmark: function(pos, options) {
-    var realOpts = {replacedWith: options && (options.nodeType == null ? options.widget : options),
-                    insertLeft: options && options.insertLeft,
-                    clearWhenEmpty: false, shared: options && options.shared,
-                    handleMouseEvents: options && options.handleMouseEvents};
-    pos = clipPos(this, pos);
-    return markText(this, pos, pos, realOpts, "bookmark")
-  },
-  findMarksAt: function(pos) {
-    pos = clipPos(this, pos);
-    var markers = [], spans = getLine(this, pos.line).markedSpans;
-    if (spans) { for (var i = 0; i < spans.length; ++i) {
-      var span = spans[i];
-      if ((span.from == null || span.from <= pos.ch) &&
-          (span.to == null || span.to >= pos.ch))
-        { markers.push(span.marker.parent || span.marker); }
-    } }
-    return markers
-  },
-  findMarks: function(from, to, filter) {
-    from = clipPos(this, from); to = clipPos(this, to);
-    var found = [], lineNo$$1 = from.line;
-    this.iter(from.line, to.line + 1, function (line) {
-      var spans = line.markedSpans;
-      if (spans) { for (var i = 0; i < spans.length; i++) {
-        var span = spans[i];
-        if (!(span.to != null && lineNo$$1 == from.line && from.ch >= span.to ||
-              span.from == null && lineNo$$1 != from.line ||
-              span.from != null && lineNo$$1 == to.line && span.from >= to.ch) &&
-            (!filter || filter(span.marker)))
-          { found.push(span.marker.parent || span.marker); }
-      } }
-      ++lineNo$$1;
-    });
-    return found
-  },
-  getAllMarks: function() {
-    var markers = [];
-    this.iter(function (line) {
-      var sps = line.markedSpans;
-      if (sps) { for (var i = 0; i < sps.length; ++i)
-        { if (sps[i].from != null) { markers.push(sps[i].marker); } } }
-    });
-    return markers
-  },
-
-  posFromIndex: function(off) {
-    var ch, lineNo$$1 = this.first, sepSize = this.lineSeparator().length;
-    this.iter(function (line) {
-      var sz = line.text.length + sepSize;
-      if (sz > off) { ch = off; return true }
-      off -= sz;
-      ++lineNo$$1;
-    });
-    return clipPos(this, Pos(lineNo$$1, ch))
-  },
-  indexFromPos: function (coords) {
-    coords = clipPos(this, coords);
-    var index = coords.ch;
-    if (coords.line < this.first || coords.ch < 0) { return 0 }
-    var sepSize = this.lineSeparator().length;
-    this.iter(this.first, coords.line, function (line) { // iter aborts when callback returns a truthy value
-      index += line.text.length + sepSize;
-    });
-    return index
-  },
-
-  copy: function(copyHistory) {
-    var doc = new Doc(getLines(this, this.first, this.first + this.size),
-                      this.modeOption, this.first, this.lineSep, this.direction);
-    doc.scrollTop = this.scrollTop; doc.scrollLeft = this.scrollLeft;
-    doc.sel = this.sel;
-    doc.extend = false;
-    if (copyHistory) {
-      doc.history.undoDepth = this.history.undoDepth;
-      doc.setHistory(this.getHistory());
-    }
-    return doc
-  },
-
-  linkedDoc: function(options) {
-    if (!options) { options = {}; }
-    var from = this.first, to = this.first + this.size;
-    if (options.from != null && options.from > from) { from = options.from; }
-    if (options.to != null && options.to < to) { to = options.to; }
-    var copy = new Doc(getLines(this, from, to), options.mode || this.modeOption, from, this.lineSep, this.direction);
-    if (options.sharedHist) { copy.history = this.history
-    ; }(this.linked || (this.linked = [])).push({doc: copy, sharedHist: options.sharedHist});
-    copy.linked = [{doc: this, isParent: true, sharedHist: options.sharedHist}];
-    copySharedMarkers(copy, findSharedMarkers(this));
-    return copy
-  },
-  unlinkDoc: function(other) {
-    var this$1 = this;
-
-    if (other instanceof CodeMirror$1) { other = other.doc; }
-    if (this.linked) { for (var i = 0; i < this.linked.length; ++i) {
-      var link = this$1.linked[i];
-      if (link.doc != other) { continue }
-      this$1.linked.splice(i, 1);
-      other.unlinkDoc(this$1);
-      detachSharedMarkers(findSharedMarkers(this$1));
-      break
-    } }
-    // If the histories were shared, split them again
-    if (other.history == this.history) {
-      var splitIds = [other.id];
-      linkedDocs(other, function (doc) { return splitIds.push(doc.id); }, true);
-      other.history = new History(null);
-      other.history.done = copyHistoryArray(this.history.done, splitIds);
-      other.history.undone = copyHistoryArray(this.history.undone, splitIds);
-    }
-  },
-  iterLinkedDocs: function(f) {linkedDocs(this, f);},
-
-  getMode: function() {return this.mode},
-  getEditor: function() {return this.cm},
-
-  splitLines: function(str) {
-    if (this.lineSep) { return str.split(this.lineSep) }
-    return splitLinesAuto(str)
-  },
-  lineSeparator: function() { return this.lineSep || "\n" },
-
-  setDirection: docMethodOp(function (dir) {
-    if (dir != "rtl") { dir = "ltr"; }
-    if (dir == this.direction) { return }
-    this.direction = dir;
-    this.iter(function (line) { return line.order = null; });
-    if (this.cm) { directionChanged(this.cm); }
-  })
-});
-
-// Public alias.
-Doc.prototype.eachLine = Doc.prototype.iter;
-
-// Kludge to work around strange IE behavior where it'll sometimes
-// re-fire a series of drag-related events right after the drop (#1551)
-var lastDrop = 0;
-
-function onDrop(e) {
-  var cm = this;
-  clearDragCursor(cm);
-  if (signalDOMEvent(cm, e) || eventInWidget(cm.display, e))
-    { return }
-  e_preventDefault(e);
-  if (ie) { lastDrop = +new Date; }
-  var pos = posFromMouse(cm, e, true), files = e.dataTransfer.files;
-  if (!pos || cm.isReadOnly()) { return }
-  // Might be a file drop, in which case we simply extract the text
-  // and insert it.
-  if (files && files.length && window.FileReader && window.File) {
-    var n = files.length, text = Array(n), read = 0;
-    var loadFile = function (file, i) {
-      if (cm.options.allowDropFileTypes &&
-          indexOf(cm.options.allowDropFileTypes, file.type) == -1)
-        { return }
-
-      var reader = new FileReader;
-      reader.onload = operation(cm, function () {
-        var content = reader.result;
-        if (/[\x00-\x08\x0e-\x1f]{2}/.test(content)) { content = ""; }
-        text[i] = content;
-        if (++read == n) {
-          pos = clipPos(cm.doc, pos);
-          var change = {from: pos, to: pos,
-                        text: cm.doc.splitLines(text.join(cm.doc.lineSeparator())),
-                        origin: "paste"};
-          makeChange(cm.doc, change);
-          setSelectionReplaceHistory(cm.doc, simpleSelection(pos, changeEnd(change)));
-        }
-      });
-      reader.readAsText(file);
-    };
-    for (var i = 0; i < n; ++i) { loadFile(files[i], i); }
-  } else { // Normal drop
-    // Don't do a replace if the drop happened inside of the selected text.
-    if (cm.state.draggingText && cm.doc.sel.contains(pos) > -1) {
-      cm.state.draggingText(e);
-      // Ensure the editor is re-focused
-      setTimeout(function () { return cm.display.input.focus(); }, 20);
-      return
-    }
-    try {
-      var text$1 = e.dataTransfer.getData("Text");
-      if (text$1) {
-        var selected;
-        if (cm.state.draggingText && !cm.state.draggingText.copy)
-          { selected = cm.listSelections(); }
-        setSelectionNoUndo(cm.doc, simpleSelection(pos, pos));
-        if (selected) { for (var i$1 = 0; i$1 < selected.length; ++i$1)
-          { replaceRange(cm.doc, "", selected[i$1].anchor, selected[i$1].head, "drag"); } }
-        cm.replaceSelection(text$1, "around", "paste");
-        cm.display.input.focus();
-      }
-    }
-    catch(e){}
-  }
-}
-
-function onDragStart(cm, e) {
-  if (ie && (!cm.state.draggingText || +new Date - lastDrop < 100)) { e_stop(e); return }
-  if (signalDOMEvent(cm, e) || eventInWidget(cm.display, e)) { return }
-
-  e.dataTransfer.setData("Text", cm.getSelection());
-  e.dataTransfer.effectAllowed = "copyMove";
-
-  // Use dummy image instead of default browsers image.
-  // Recent Safari (~6.0.2) have a tendency to segfault when this happens, so we don't do it there.
-  if (e.dataTransfer.setDragImage && !safari) {
-    var img = elt("img", null, null, "position: fixed; left: 0; top: 0;");
-    img.src = "data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==";
-    if (presto) {
-      img.width = img.height = 1;
-      cm.display.wrapper.appendChild(img);
-      // Force a relayout, or Opera won't use our image for some obscure reason
-      img._top = img.offsetTop;
-    }
-    e.dataTransfer.setDragImage(img, 0, 0);
-    if (presto) { img.parentNode.removeChild(img); }
-  }
-}
-
-function onDragOver(cm, e) {
-  var pos = posFromMouse(cm, e);
-  if (!pos) { return }
-  var frag = document.createDocumentFragment();
-  drawSelectionCursor(cm, pos, frag);
-  if (!cm.display.dragCursor) {
-    cm.display.dragCursor = elt("div", null, "CodeMirror-cursors CodeMirror-dragcursors");
-    cm.display.lineSpace.insertBefore(cm.display.dragCursor, cm.display.cursorDiv);
-  }
-  removeChildrenAndAdd(cm.display.dragCursor, frag);
-}
-
-function clearDragCursor(cm) {
-  if (cm.display.dragCursor) {
-    cm.display.lineSpace.removeChild(cm.display.dragCursor);
-    cm.display.dragCursor = null;
-  }
-}
-
-// These must be handled carefully, because naively registering a
-// handler for each editor will cause the editors to never be
-// garbage collected.
-
-function forEachCodeMirror(f) {
-  if (!document.getElementsByClassName) { return }
-  var byClass = document.getElementsByClassName("CodeMirror");
-  for (var i = 0; i < byClass.length; i++) {
-    var cm = byClass[i].CodeMirror;
-    if (cm) { f(cm); }
-  }
-}
-
-var globalsRegistered = false;
-function ensureGlobalHandlers() {
-  if (globalsRegistered) { return }
-  registerGlobalHandlers();
-  globalsRegistered = true;
-}
-function registerGlobalHandlers() {
-  // When the window resizes, we need to refresh active editors.
-  var resizeTimer;
-  on(window, "resize", function () {
-    if (resizeTimer == null) { resizeTimer = setTimeout(function () {
-      resizeTimer = null;
-      forEachCodeMirror(onResize);
-    }, 100); }
-  });
-  // When the window loses focus, we want to show the editor as blurred
-  on(window, "blur", function () { return forEachCodeMirror(onBlur); });
-}
-// Called when the window resizes
-function onResize(cm) {
-  var d = cm.display;
-  // Might be a text scaling operation, clear size caches.
-  d.cachedCharWidth = d.cachedTextHeight = d.cachedPaddingH = null;
-  d.scrollbarsClipped = false;
-  cm.setSize();
-}
-
-var keyNames = {
-  3: "Pause", 8: "Backspace", 9: "Tab", 13: "Enter", 16: "Shift", 17: "Ctrl", 18: "Alt",
-  19: "Pause", 20: "CapsLock", 27: "Esc", 32: "Space", 33: "PageUp", 34: "PageDown", 35: "End",
-  36: "Home", 37: "Left", 38: "Up", 39: "Right", 40: "Down", 44: "PrintScrn", 45: "Insert",
-  46: "Delete", 59: ";", 61: "=", 91: "Mod", 92: "Mod", 93: "Mod",
-  106: "*", 107: "=", 109: "-", 110: ".", 111: "/", 127: "Delete", 145: "ScrollLock",
-  173: "-", 186: ";", 187: "=", 188: ",", 189: "-", 190: ".", 191: "/", 192: "`", 219: "[", 220: "\\",
-  221: "]", 222: "'", 63232: "Up", 63233: "Down", 63234: "Left", 63235: "Right", 63272: "Delete",
-  63273: "Home", 63275: "End", 63276: "PageUp", 63277: "PageDown", 63302: "Insert"
-};
-
-// Number keys
-for (var i = 0; i < 10; i++) { keyNames[i + 48] = keyNames[i + 96] = String(i); }
-// Alphabetic keys
-for (var i$1 = 65; i$1 <= 90; i$1++) { keyNames[i$1] = String.fromCharCode(i$1); }
-// Function keys
-for (var i$2 = 1; i$2 <= 12; i$2++) { keyNames[i$2 + 111] = keyNames[i$2 + 63235] = "F" + i$2; }
-
-var keyMap = {};
-
-keyMap.basic = {
-  "Left": "goCharLeft", "Right": "goCharRight", "Up": "goLineUp", "Down": "goLineDown",
-  "End": "goLineEnd", "Home": "goLineStartSmart", "PageUp": "goPageUp", "PageDown": "goPageDown",
-  "Delete": "delCharAfter", "Backspace": "delCharBefore", "Shift-Backspace": "delCharBefore",
-  "Tab": "defaultTab", "Shift-Tab": "indentAuto",
-  "Enter": "newlineAndIndent", "Insert": "toggleOverwrite",
-  "Esc": "singleSelection"
-};
-// Note that the save and find-related commands aren't defined by
-// default. User code or addons can define them. Unknown commands
-// are simply ignored.
-keyMap.pcDefault = {
-  "Ctrl-A": "selectAll", "Ctrl-D": "deleteLine", "Ctrl-Z": "undo", "Shift-Ctrl-Z": "redo", "Ctrl-Y": "redo",
-  "Ctrl-Home": "goDocStart", "Ctrl-End": "goDocEnd", "Ctrl-Up": "goLineUp", "Ctrl-Down": "goLineDown",
-  "Ctrl-Left": "goGroupLeft", "Ctrl-Right": "goGroupRight", "Alt-Left": "goLineStart", "Alt-Right": "goLineEnd",
-  "Ctrl-Backspace": "delGroupBefore", "Ctrl-Delete": "delGroupAfter", "Ctrl-S": "save", "Ctrl-F": "find",
-  "Ctrl-G": "findNext", "Shift-Ctrl-G": "findPrev", "Shift-Ctrl-F": "replace", "Shift-Ctrl-R": "replaceAll",
-  "Ctrl-[": "indentLess", "Ctrl-]": "indentMore",
-  "Ctrl-U": "undoSelection", "Shift-Ctrl-U": "redoSelection", "Alt-U": "redoSelection",
-  fallthrough: "basic"
-};
-// Very basic readline/emacs-style bindings, which are standard on Mac.
-keyMap.emacsy = {
-  "Ctrl-F": "goCharRight", "Ctrl-B": "goCharLeft", "Ctrl-P": "goLineUp", "Ctrl-N": "goLineDown",
-  "Alt-F": "goWordRight", "Alt-B": "goWordLeft", "Ctrl-A": "goLineStart", "Ctrl-E": "goLineEnd",
-  "Ctrl-V": "goPageDown", "Shift-Ctrl-V": "goPageUp", "Ctrl-D": "delCharAfter", "Ctrl-H": "delCharBefore",
-  "Alt-D": "delWordAfter", "Alt-Backspace": "delWordBefore", "Ctrl-K": "killLine", "Ctrl-T": "transposeChars",
-  "Ctrl-O": "openLine"
-};
-keyMap.macDefault = {
-  "Cmd-A": "selectAll", "Cmd-D": "deleteLine", "Cmd-Z": "undo", "Shift-Cmd-Z": "redo", "Cmd-Y": "redo",
-  "Cmd-Home": "goDocStart", "Cmd-Up": "goDocStart", "Cmd-End": "goDocEnd", "Cmd-Down": "goDocEnd", "Alt-Left": "goGroupLeft",
-  "Alt-Right": "goGroupRight", "Cmd-Left": "goLineLeft", "Cmd-Right": "goLineRight", "Alt-Backspace": "delGroupBefore",
-  "Ctrl-Alt-Backspace": "delGroupAfter", "Alt-Delete": "delGroupAfter", "Cmd-S": "save", "Cmd-F": "find",
-  "Cmd-G": "findNext", "Shift-Cmd-G": "findPrev", "Cmd-Alt-F": "replace", "Shift-Cmd-Alt-F": "replaceAll",
-  "Cmd-[": "indentLess", "Cmd-]": "indentMore", "Cmd-Backspace": "delWrappedLineLeft", "Cmd-Delete": "delWrappedLineRight",
-  "Cmd-U": "undoSelection", "Shift-Cmd-U": "redoSelection", "Ctrl-Up": "goDocStart", "Ctrl-Down": "goDocEnd",
-  fallthrough: ["basic", "emacsy"]
-};
-keyMap["default"] = mac ? keyMap.macDefault : keyMap.pcDefault;
-
-// KEYMAP DISPATCH
-
-function normalizeKeyName(name) {
-  var parts = name.split(/-(?!$)/);
-  name = parts[parts.length - 1];
-  var alt, ctrl, shift, cmd;
-  for (var i = 0; i < parts.length - 1; i++) {
-    var mod = parts[i];
-    if (/^(cmd|meta|m)$/i.test(mod)) { cmd = true; }
-    else if (/^a(lt)?$/i.test(mod)) { alt = true; }
-    else if (/^(c|ctrl|control)$/i.test(mod)) { ctrl = true; }
-    else if (/^s(hift)?$/i.test(mod)) { shift = true; }
-    else { throw new Error("Unrecognized modifier name: " + mod) }
-  }
-  if (alt) { name = "Alt-" + name; }
-  if (ctrl) { name = "Ctrl-" + name; }
-  if (cmd) { name = "Cmd-" + name; }
-  if (shift) { name = "Shift-" + name; }
-  return name
-}
-
-// This is a kludge to keep keymaps mostly working as raw objects
-// (backwards compatibility) while at the same time support features
-// like normalization and multi-stroke key bindings. It compiles a
-// new normalized keymap, and then updates the old object to reflect
-// this.
-function normalizeKeyMap(keymap) {
-  var copy = {};
-  for (var keyname in keymap) { if (keymap.hasOwnProperty(keyname)) {
-    var value = keymap[keyname];
-    if (/^(name|fallthrough|(de|at)tach)$/.test(keyname)) { continue }
-    if (value == "...") { delete keymap[keyname]; continue }
-
-    var keys = map(keyname.split(" "), normalizeKeyName);
-    for (var i = 0; i < keys.length; i++) {
-      var val = (void 0), name = (void 0);
-      if (i == keys.length - 1) {
-        name = keys.join(" ");
-        val = value;
-      } else {
-        name = keys.slice(0, i + 1).join(" ");
-        val = "...";
-      }
-      var prev = copy[name];
-      if (!prev) { copy[name] = val; }
-      else if (prev != val) { throw new Error("Inconsistent bindings for " + name) }
-    }
-    delete keymap[keyname];
-  } }
-  for (var prop in copy) { keymap[prop] = copy[prop]; }
-  return keymap
-}
-
-function lookupKey(key, map$$1, handle, context) {
-  map$$1 = getKeyMap(map$$1);
-  var found = map$$1.call ? map$$1.call(key, context) : map$$1[key];
-  if (found === false) { return "nothing" }
-  if (found === "...") { return "multi" }
-  if (found != null && handle(found)) { return "handled" }
-
-  if (map$$1.fallthrough) {
-    if (Object.prototype.toString.call(map$$1.fallthrough) != "[object Array]")
-      { return lookupKey(key, map$$1.fallthrough, handle, context) }
-    for (var i = 0; i < map$$1.fallthrough.length; i++) {
-      var result = lookupKey(key, map$$1.fallthrough[i], handle, context);
-      if (result) { return result }
-    }
-  }
-}
-
-// Modifier key presses don't count as 'real' key presses for the
-// purpose of keymap fallthrough.
-function isModifierKey(value) {
-  var name = typeof value == "string" ? value : keyNames[value.keyCode];
-  return name == "Ctrl" || name == "Alt" || name == "Shift" || name == "Mod"
-}
-
-function addModifierNames(name, event, noShift) {
-  var base = name;
-  if (event.altKey && base != "Alt") { name = "Alt-" + name; }
-  if ((flipCtrlCmd ? event.metaKey : event.ctrlKey) && base != "Ctrl") { name = "Ctrl-" + name; }
-  if ((flipCtrlCmd ? event.ctrlKey : event.metaKey) && base != "Cmd") { name = "Cmd-" + name; }
-  if (!noShift && event.shiftKey && base != "Shift") { name = "Shift-" + name; }
-  return name
-}
-
-// Look up the name of a key as indicated by an event object.
-function keyName(event, noShift) {
-  if (presto && event.keyCode == 34 && event["char"]) { return false }
-  var name = keyNames[event.keyCode];
-  if (name == null || event.altGraphKey) { return false }
-  // Ctrl-ScrollLock has keyCode 3, same as Ctrl-Pause,
-  // so we'll use event.code when available (Chrome 48+, FF 38+, Safari 10.1+)
-  if (event.keyCode == 3 && event.code) { name = event.code; }
-  return addModifierNames(name, event, noShift)
-}
-
-function getKeyMap(val) {
-  return typeof val == "string" ? keyMap[val] : val
-}
-
-// Helper for deleting text near the selection(s), used to implement
-// backspace, delete, and similar functionality.
-function deleteNearSelection(cm, compute) {
-  var ranges = cm.doc.sel.ranges, kill = [];
-  // Build up a set of ranges to kill first, merging overlapping
-  // ranges.
-  for (var i = 0; i < ranges.length; i++) {
-    var toKill = compute(ranges[i]);
-    while (kill.length && cmp(toKill.from, lst(kill).to) <= 0) {
-      var replaced = kill.pop();
-      if (cmp(replaced.from, toKill.from) < 0) {
-        toKill.from = replaced.from;
-        break
-      }
-    }
-    kill.push(toKill);
-  }
-  // Next, remove those actual ranges.
-  runInOp(cm, function () {
-    for (var i = kill.length - 1; i >= 0; i--)
-      { replaceRange(cm.doc, "", kill[i].from, kill[i].to, "+delete"); }
-    ensureCursorVisible(cm);
-  });
-}
-
-function moveCharLogically(line, ch, dir) {
-  var target = skipExtendingChars(line.text, ch + dir, dir);
-  return target < 0 || target > line.text.length ? null : target
-}
-
-function moveLogically(line, start, dir) {
-  var ch = moveCharLogically(line, start.ch, dir);
-  return ch == null ? null : new Pos(start.line, ch, dir < 0 ? "after" : "before")
-}
-
-function endOfLine(visually, cm, lineObj, lineNo, dir) {
-  if (visually) {
-    var order = getOrder(lineObj, cm.doc.direction);
-    if (order) {
-      var part = dir < 0 ? lst(order) : order[0];
-      var moveInStorageOrder = (dir < 0) == (part.level == 1);
-      var sticky = moveInStorageOrder ? "after" : "before";
-      var ch;
-      // With a wrapped rtl chunk (possibly spanning multiple bidi parts),
-      // it could be that the last bidi part is not on the last visual line,
-      // since visual lines contain content order-consecutive chunks.
-      // Thus, in rtl, we are looking for the first (content-order) character
-      // in the rtl chunk that is on the last line (that is, the same line
-      // as the last (content-order) character).
-      if (part.level > 0 || cm.doc.direction == "rtl") {
-        var prep = prepareMeasureForLine(cm, lineObj);
-        ch = dir < 0 ? lineObj.text.length - 1 : 0;
-        var targetTop = measureCharPrepared(cm, prep, ch).top;
-        ch = findFirst(function (ch) { return measureCharPrepared(cm, prep, ch).top == targetTop; }, (dir < 0) == (part.level == 1) ? part.from : part.to - 1, ch);
-        if (sticky == "before") { ch = moveCharLogically(lineObj, ch, 1); }
-      } else { ch = dir < 0 ? part.to : part.from; }
-      return new Pos(lineNo, ch, sticky)
-    }
-  }
-  return new Pos(lineNo, dir < 0 ? lineObj.text.length : 0, dir < 0 ? "before" : "after")
-}
-
-function moveVisually(cm, line, start, dir) {
-  var bidi = getOrder(line, cm.doc.direction);
-  if (!bidi) { return moveLogically(line, start, dir) }
-  if (start.ch >= line.text.length) {
-    start.ch = line.text.length;
-    start.sticky = "before";
-  } else if (start.ch <= 0) {
-    start.ch = 0;
-    start.sticky = "after";
-  }
-  var partPos = getBidiPartAt(bidi, start.ch, start.sticky), part = bidi[partPos];
-  if (cm.doc.direction == "ltr" && part.level % 2 == 0 && (dir > 0 ? part.to > start.ch : part.from < start.ch)) {
-    // Case 1: We move within an ltr part in an ltr editor. Even with wrapped lines,
-    // nothing interesting happens.
-    return moveLogically(line, start, dir)
-  }
-
-  var mv = function (pos, dir) { return moveCharLogically(line, pos instanceof Pos ? pos.ch : pos, dir); };
-  var prep;
-  var getWrappedLineExtent = function (ch) {
-    if (!cm.options.lineWrapping) { return {begin: 0, end: line.text.length} }
-    prep = prep || prepareMeasureForLine(cm, line);
-    return wrappedLineExtentChar(cm, line, prep, ch)
-  };
-  var wrappedLineExtent = getWrappedLineExtent(start.sticky == "before" ? mv(start, -1) : start.ch);
-
-  if (cm.doc.direction == "rtl" || part.level == 1) {
-    var moveInStorageOrder = (part.level == 1) == (dir < 0);
-    var ch = mv(start, moveInStorageOrder ? 1 : -1);
-    if (ch != null && (!moveInStorageOrder ? ch >= part.from && ch >= wrappedLineExtent.begin : ch <= part.to && ch <= wrappedLineExtent.end)) {
-      // Case 2: We move within an rtl part or in an rtl editor on the same visual line
-      var sticky = moveInStorageOrder ? "before" : "after";
-      return new Pos(start.line, ch, sticky)
-    }
-  }
-
-  // Case 3: Could not move within this bidi part in this visual line, so leave
-  // the current bidi part
-
-  var searchInVisualLine = function (partPos, dir, wrappedLineExtent) {
-    var getRes = function (ch, moveInStorageOrder) { return moveInStorageOrder
-      ? new Pos(start.line, mv(ch, 1), "before")
-      : new Pos(start.line, ch, "after"); };
-
-    for (; partPos >= 0 && partPos < bidi.length; partPos += dir) {
-      var part = bidi[partPos];
-      var moveInStorageOrder = (dir > 0) == (part.level != 1);
-      var ch = moveInStorageOrder ? wrappedLineExtent.begin : mv(wrappedLineExtent.end, -1);
-      if (part.from <= ch && ch < part.to) { return getRes(ch, moveInStorageOrder) }
-      ch = moveInStorageOrder ? part.from : mv(part.to, -1);
-      if (wrappedLineExtent.begin <= ch && ch < wrappedLineExtent.end) { return getRes(ch, moveInStorageOrder) }
-    }
-  };
-
-  // Case 3a: Look for other bidi parts on the same visual line
-  var res = searchInVisualLine(partPos + dir, dir, wrappedLineExtent);
-  if (res) { return res }
-
-  // Case 3b: Look for other bidi parts on the next visual line
-  var nextCh = dir > 0 ? wrappedLineExtent.end : mv(wrappedLineExtent.begin, -1);
-  if (nextCh != null && !(dir > 0 && nextCh == line.text.length)) {
-    res = searchInVisualLine(dir > 0 ? 0 : bidi.length - 1, dir, getWrappedLineExtent(nextCh));
-    if (res) { return res }
-  }
-
-  // Case 4: Nowhere to move
-  return null
-}
-
-// Commands are parameter-less actions that can be performed on an
-// editor, mostly used for keybindings.
-var commands = {
-  selectAll: selectAll,
-  singleSelection: function (cm) { return cm.setSelection(cm.getCursor("anchor"), cm.getCursor("head"), sel_dontScroll); },
-  killLine: function (cm) { return deleteNearSelection(cm, function (range) {
-    if (range.empty()) {
-      var len = getLine(cm.doc, range.head.line).text.length;
-      if (range.head.ch == len && range.head.line < cm.lastLine())
-        { return {from: range.head, to: Pos(range.head.line + 1, 0)} }
-      else
-        { return {from: range.head, to: Pos(range.head.line, len)} }
-    } else {
-      return {from: range.from(), to: range.to()}
-    }
-  }); },
-  deleteLine: function (cm) { return deleteNearSelection(cm, function (range) { return ({
-    from: Pos(range.from().line, 0),
-    to: clipPos(cm.doc, Pos(range.to().line + 1, 0))
-  }); }); },
-  delLineLeft: function (cm) { return deleteNearSelection(cm, function (range) { return ({
-    from: Pos(range.from().line, 0), to: range.from()
-  }); }); },
-  delWrappedLineLeft: function (cm) { return deleteNearSelection(cm, function (range) {
-    var top = cm.charCoords(range.head, "div").top + 5;
-    var leftPos = cm.coordsChar({left: 0, top: top}, "div");
-    return {from: leftPos, to: range.from()}
-  }); },
-  delWrappedLineRight: function (cm) { return deleteNearSelection(cm, function (range) {
-    var top = cm.charCoords(range.head, "div").top + 5;
-    var rightPos = cm.coordsChar({left: cm.display.lineDiv.offsetWidth + 100, top: top}, "div");
-    return {from: range.from(), to: rightPos }
-  }); },
-  undo: function (cm) { return cm.undo(); },
-  redo: function (cm) { return cm.redo(); },
-  undoSelection: function (cm) { return cm.undoSelection(); },
-  redoSelection: function (cm) { return cm.redoSelection(); },
-  goDocStart: function (cm) { return cm.extendSelection(Pos(cm.firstLine(), 0)); },
-  goDocEnd: function (cm) { return cm.extendSelection(Pos(cm.lastLine())); },
-  goLineStart: function (cm) { return cm.extendSelectionsBy(function (range) { return lineStart(cm, range.head.line); },
-    {origin: "+move", bias: 1}
-  ); },
-  goLineStartSmart: function (cm) { return cm.extendSelectionsBy(function (range) { return lineStartSmart(cm, range.head); },
-    {origin: "+move", bias: 1}
-  ); },
-  goLineEnd: function (cm) { return cm.extendSelectionsBy(function (range) { return lineEnd(cm, range.head.line); },
-    {origin: "+move", bias: -1}
-  ); },
-  goLineRight: function (cm) { return cm.extendSelectionsBy(function (range) {
-    var top = cm.cursorCoords(range.head, "div").top + 5;
-    return cm.coordsChar({left: cm.display.lineDiv.offsetWidth + 100, top: top}, "div")
-  }, sel_move); },
-  goLineLeft: function (cm) { return cm.extendSelectionsBy(function (range) {
-    var top = cm.cursorCoords(range.head, "div").top + 5;
-    return cm.coordsChar({left: 0, top: top}, "div")
-  }, sel_move); },
-  goLineLeftSmart: function (cm) { return cm.extendSelectionsBy(function (range) {
-    var top = cm.cursorCoords(range.head, "div").top + 5;
-    var pos = cm.coordsChar({left: 0, top: top}, "div");
-    if (pos.ch < cm.getLine(pos.line).search(/\S/)) { return lineStartSmart(cm, range.head) }
-    return pos
-  }, sel_move); },
-  goLineUp: function (cm) { return cm.moveV(-1, "line"); },
-  goLineDown: function (cm) { return cm.moveV(1, "line"); },
-  goPageUp: function (cm) { return cm.moveV(-1, "page"); },
-  goPageDown: function (cm) { return cm.moveV(1, "page"); },
-  goCharLeft: function (cm) { return cm.moveH(-1, "char"); },
-  goCharRight: function (cm) { return cm.moveH(1, "char"); },
-  goColumnLeft: function (cm) { return cm.moveH(-1, "column"); },
-  goColumnRight: function (cm) { return cm.moveH(1, "column"); },
-  goWordLeft: function (cm) { return cm.moveH(-1, "word"); },
-  goGroupRight: function (cm) { return cm.moveH(1, "group"); },
-  goGroupLeft: function (cm) { return cm.moveH(-1, "group"); },
-  goWordRight: function (cm) { return cm.moveH(1, "word"); },
-  delCharBefore: function (cm) { return cm.deleteH(-1, "char"); },
-  delCharAfter: function (cm) { return cm.deleteH(1, "char"); },
-  delWordBefore: function (cm) { return cm.deleteH(-1, "word"); },
-  delWordAfter: function (cm) { return cm.deleteH(1, "word"); },
-  delGroupBefore: function (cm) { re