The Tor Browser: toolkit/content/widgets/autocomplete.xml@6474c204b198 (annotated)

toolkit/content/widgets/autocomplete.xml@6474c204b198 (annotated)

toolkit/content/widgets/autocomplete.xml

Wed, 31 Dec 2014 06:09:35 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 06:09:35 +0100
changeset 0: 6474c204b198
permissions: -rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

 <?xml version="1.0"?>
 # -*- Mode: HTML -*-
 # This Source Code Form is subject to the terms of the Mozilla Public
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 <!DOCTYPE bindings [
 <!ENTITY % actionsDTD SYSTEM "chrome://global/locale/actions.dtd">
 %actionsDTD;
 ]>
 <bindings id="autocompleteBindings"
           xmlns="http://www.mozilla.org/xbl"
           xmlns:html="http://www.w3.org/1999/xhtml"
           xmlns:xul="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
           xmlns:xbl="http://www.mozilla.org/xbl">
   <binding id="autocomplete" role="xul:combobox"
            extends="chrome://global/content/bindings/textbox.xml#textbox">
     <resources>
       <stylesheet src="chrome://global/skin/autocomplete.css"/>
     </resources>
     <content sizetopopup="pref">
       <xul:hbox class="autocomplete-textbox-container" flex="1" xbl:inherits="focused">
         <children includes="image|deck|stack|box">
           <xul:image class="autocomplete-icon" allowevents="true"/>
         </children>
         <xul:hbox anonid="textbox-input-box" class="textbox-input-box" flex="1" xbl:inherits="tooltiptext=inputtooltiptext">
           <children/>
           <html:input anonid="input" class="autocomplete-textbox textbox-input"
                       allowevents="true"
                       xbl:inherits="tooltiptext=inputtooltiptext,value,type,maxlength,disabled,size,readonly,placeholder,tabindex,accesskey,mozactionhint"/>
         </xul:hbox>
         <children includes="hbox"/>
       </xul:hbox>
       <xul:dropmarker anonid="historydropmarker" class="autocomplete-history-dropmarker"
                       allowevents="true"
                       xbl:inherits="open,enablehistory,parentfocused=focused"/>
       <xul:popupset anonid="popupset" class="autocomplete-result-popupset"/>
       <children includes="toolbarbutton"/>
     </content>
     <implementation implements="nsIAutoCompleteInput, nsIDOMXULMenuListElement">
       <field name="mController">null</field>
       <field name="mSearchNames">null</field>
       <field name="mIgnoreInput">false</field>
       <field name="mEnterEvent">null</field>
       <field name="_searchBeginHandler">null</field>
       <field name="_searchCompleteHandler">null</field>
       <field name="_textEnteredHandler">null</field>
       <field name="_textRevertedHandler">null</field>
       <constructor><![CDATA[
         this.mController = Components.classes["@mozilla.org/autocomplete/controller;1"].
           getService(Components.interfaces.nsIAutoCompleteController);
         this._searchBeginHandler = this.initEventHandler("searchbegin");
         this._searchCompleteHandler = this.initEventHandler("searchcomplete");
         this._textEnteredHandler = this.initEventHandler("textentered");
         this._textRevertedHandler = this.initEventHandler("textreverted");
         // For security reasons delay searches on pasted values.
         this.inputField.controllers.insertControllerAt(0, this._pasteController);
       ]]></constructor>
       <destructor><![CDATA[
         this.inputField.controllers.removeController(this._pasteController);
       ]]></destructor>
       <!-- =================== nsIAutoCompleteInput =================== -->
       <field name="popup"><![CDATA[
         // Wrap in a block so that the let statements don't
         // create properties on 'this' (bug 635252).
         {
           let popup = null;
           let popupId = this.getAttribute("autocompletepopup");
           if (popupId)
             popup = document.getElementById(popupId);
           if (!popup) {
             popup = document.createElement("panel");
             popup.setAttribute("type", "autocomplete");
             popup.setAttribute("noautofocus", "true");
             let popupset = document.getAnonymousElementByAttribute(this, "anonid", "popupset");
             popupset.appendChild(popup);
           }
           popup.mInput = this;
           popup;
         }
       ]]></field>
       <property name="controller" onget="return this.mController;" readonly="true"/>
       <property name="popupOpen"
                 onget="return this.popup.popupOpen;"
                 onset="if (val) this.openPopup(); else this.closePopup();"/>
       <property name="disableAutoComplete"
                 onset="this.setAttribute('disableautocomplete', val); return val;"
                 onget="return this.getAttribute('disableautocomplete') == 'true';"/>
       <property name="completeDefaultIndex"
                 onset="this.setAttribute('completedefaultindex', val); return val;"
                 onget="return this.getAttribute('completedefaultindex') == 'true';"/>
       <property name="completeSelectedIndex"
                 onset="this.setAttribute('completeselectedindex', val); return val;"
                 onget="return this.getAttribute('completeselectedindex') == 'true';"/>
       <property name="forceComplete"
                 onset="this.setAttribute('forcecomplete', val); return val;"
                 onget="return this.getAttribute('forcecomplete') == 'true';"/>
       <property name="minResultsForPopup"
                 onset="this.setAttribute('minresultsforpopup', val); return val;"
                 onget="var m = parseInt(this.getAttribute('minresultsforpopup')); return isNaN(m) ? 1 : m;"/>
       <property name="showCommentColumn"
                 onset="this.setAttribute('showcommentcolumn', val); return val;"
                 onget="return this.getAttribute('showcommentcolumn') == 'true';"/>
       <property name="showImageColumn"
                 onset="this.setAttribute('showimagecolumn', val); return val;"
                 onget="return this.getAttribute('showimagecolumn') == 'true';"/>
       <property name="timeout"
                 onset="this.setAttribute('timeout', val); return val;">
         <getter><![CDATA[
           // For security reasons delay searches on pasted values.
           if (this._valueIsPasted) {
             let t = parseInt(this.getAttribute('pastetimeout'));
             return isNaN(t) ? 1000 : t;
           }
           let t = parseInt(this.getAttribute('timeout'));
           return isNaN(t) ? 50 : t;
         ]]></getter>
       </property>
       <property name="searchParam"
                 onget="return this.getAttribute('autocompletesearchparam') || '';"
                 onset="this.setAttribute('autocompletesearchparam', val); return val;"/>
       <property name="searchCount" readonly="true"
                 onget="this.initSearchNames(); return this.mSearchNames.length;"/>
       <field name="PrivateBrowsingUtils" readonly="true">
         let utils = {};
         Components.utils.import("resource://gre/modules/PrivateBrowsingUtils.jsm", utils);
         utils.PrivateBrowsingUtils
       </field>
       <property name="inPrivateContext" readonly="true"
                 onget="return this.PrivateBrowsingUtils.isWindowPrivate(window);"/>
       <!-- This is the maximum number of drop-down rows we get when we
             hit the drop marker beside fields that have it (like the URLbar).-->
       <field name="maxDropMarkerRows" readonly="true">14</field>
       <method name="getSearchAt">
         <parameter name="aIndex"/>
         <body><![CDATA[
           this.initSearchNames();
           return this.mSearchNames[aIndex];
         ]]></body>
       </method>
       <property name="textValue"
                 onget="return this.value;">
         <setter><![CDATA[
           // Completing a result should simulate the user typing the result,
           // so fire an input event.
           // Trim popup selected values, but never trim results coming from
           // autofill.
           if (this.popup.selectedIndex == -1)
             this._disableTrim = true;
           this.value = val;
           this._disableTrim = false;
           var evt = document.createEvent("UIEvents");
           evt.initUIEvent("input", true, false, window, 0);
           this.mIgnoreInput = true;
           this.dispatchEvent(evt);
           this.mIgnoreInput = false;
           return this.value;
         ]]></setter>
       </property>
       <method name="selectTextRange">
         <parameter name="aStartIndex"/>
         <parameter name="aEndIndex"/>
         <body><![CDATA[
           this.inputField.setSelectionRange(aStartIndex, aEndIndex);
         ]]></body>
       </method>
       <method name="onSearchBegin">
         <body><![CDATA[
           if (this._searchBeginHandler)
             this._searchBeginHandler();
         ]]></body>
       </method>
       <method name="onSearchComplete">
         <body><![CDATA[
           if (this.mController.matchCount == 0)
             this.setAttribute("nomatch", "true");
           else
             this.removeAttribute("nomatch");
           if (this._searchCompleteHandler)
             this._searchCompleteHandler();
         ]]></body>
       </method>
       <method name="onTextEntered">
         <body><![CDATA[
           let rv = false;
           if (this._textEnteredHandler)
             rv = this._textEnteredHandler(this.mEnterEvent);
           this.mEnterEvent = null;
           return rv;
         ]]></body>
       </method>
       <method name="onTextReverted">
         <body><![CDATA[
           if (this._textRevertedHandler)
             return this._textRevertedHandler();
           return false;
         ]]></body>
       </method>
       <!-- =================== nsIDOMXULMenuListElement =================== -->
       <property name="editable" readonly="true"
                 onget="return true;" />
       <property name="crop"
                 onset="this.setAttribute('crop',val); return val;"
                 onget="return this.getAttribute('crop');"/>
       <property name="open"
                 onget="return this.getAttribute('open') == 'true';">
         <setter><![CDATA[
           if (val)
             this.showHistoryPopup();
           else
             this.closePopup();
         ]]></setter>
       </property>
       <!-- =================== PUBLIC MEMBERS =================== -->
       <field name="valueIsTyped">false</field>
       <field name="_disableTrim">false</field>
       <property name="value">
         <getter><![CDATA[
           if (typeof this.onBeforeValueGet == "function") {
             var result = this.onBeforeValueGet();
             if (result)
               return result.value;
           }
           return this.inputField.value;
         ]]></getter>
         <setter><![CDATA[
           this.mIgnoreInput = true;
           if (typeof this.onBeforeValueSet == "function")
             val = this.onBeforeValueSet(val);
           if (typeof this.trimValue == "function" && !this._disableTrim)
             val = this.trimValue(val);
           this.valueIsTyped = false;
           this.inputField.value = val;
           if (typeof this.formatValue == "function")
             this.formatValue();
           this.mIgnoreInput = false;
           var event = document.createEvent('Events');
           event.initEvent('ValueChange', true, true);
           this.inputField.dispatchEvent(event);
           return val;
         ]]></setter>
       </property>
       <property name="focused" readonly="true"
                 onget="return this.getAttribute('focused') == 'true';"/>
       <!-- maximum number of rows to display at a time -->
       <property name="maxRows"
                 onset="this.setAttribute('maxrows', val); return val;"
                 onget="return parseInt(this.getAttribute('maxrows')) || 0;"/>
       <!-- option to allow scrolling through the list via the tab key, rather than
            tab moving focus out of the textbox -->
       <property name="tabScrolling"
                 onset="return this.setAttribute('tabscrolling', val); return val;"
                 onget="return this.getAttribute('tabscrolling') == 'true';"/>
       <!-- disable key navigation handling in the popup results -->
       <property name="disableKeyNavigation"
                 onset="this.setAttribute('disablekeynavigation', val); return val;"
                 onget="return this.getAttribute('disablekeynavigation') == 'true';"/>
       <!-- option to completely ignore any blur events while
            searches are still going on.  This is useful so that nothing
            gets autopicked if the window is required to lose focus for
            some reason (eg in LDAP autocomplete, another window may be
            brought up so that the user can enter a password to authenticate
            to an LDAP server).  -->
       <property name="ignoreBlurWhileSearching"
                 onset="this.setAttribute('ignoreblurwhilesearching', val); return val;"
                 onget="return this.getAttribute('ignoreblurwhilesearching') == 'true';"/>
       <!-- option to highlight entries that don't have any matches -->
       <property name="highlightNonMatches"
                 onset="this.setAttribute('highlightnonmatches', val); return val;"
                 onget="return this.getAttribute('highlightnonmatches') == 'true';"/>
       <!-- =================== PRIVATE MEMBERS =================== -->
       <!-- ::::::::::::: autocomplete controller ::::::::::::: -->
       <method name="attachController">
         <body><![CDATA[
           this.mController.input = this;
         ]]></body>
       </method>
       <method name="detachController">
         <body><![CDATA[
           try {
             if  (this.mController.input == this)
             this.mController.input = null;
           } catch (ex) {
             // nothing really to do.
           }
         ]]></body>
       </method>
       <!-- ::::::::::::: popup opening ::::::::::::: -->
       <method name="openPopup">
         <body><![CDATA[
           this.popup.openAutocompletePopup(this, this);
         ]]></body>
       </method>
       <method name="closePopup">
         <body><![CDATA[
           this.popup.setAttribute("consumeoutsideclicks", "false");
           this.popup.closePopup();
         ]]></body>
       </method>
       <method name="showHistoryPopup">
         <body><![CDATA[
           // history dropmarker pushed state
           function cleanup(popup) {
             popup.removeEventListener("popupshowing", onShow, false);
           }
           function onShow(event) {
             var popup = event.target, input = popup.input;
             cleanup(popup);
             input.setAttribute("open", "true");
             function onHide() {
               input.removeAttribute("open");
               popup.setAttribute("consumeoutsideclicks", "false");
               popup.removeEventListener("popuphiding", onHide, false);
             }
             popup.addEventListener("popuphiding", onHide, false);
           }
           this.popup.addEventListener("popupshowing", onShow, false);
           setTimeout(cleanup, 1000, this.popup);
           // Store our "normal" maxRows on the popup, so that it can reset the
           // value when the popup is hidden.
           this.popup._normalMaxRows = this.maxRows;
           // Increase our maxRows temporarily, since we want the dropdown to
           // be bigger in this case. The popup's popupshowing/popuphiding
           // handlers will take care of resetting this.
           this.maxRows = this.maxDropMarkerRows;
           // Ensure that we have focus.
           if (!this.focused)
             this.focus();
           this.popup.setAttribute("consumeoutsideclicks", "true");
           this.attachController();
           this.mController.startSearch("");
         ]]></body>
       </method>
       <method name="toggleHistoryPopup">
         <body><![CDATA[
           if (!this.popup.popupOpen)
             this.showHistoryPopup();
           else
             this.closePopup();
         ]]></body>
       </method>
       <!-- ::::::::::::: event dispatching ::::::::::::: -->
       <method name="initEventHandler">
         <parameter name="aEventType"/>
         <body><![CDATA[
           let handlerString = this.getAttribute("on" + aEventType);
           if (handlerString) {
             return (new Function("eventType", "param", handlerString)).bind(this, aEventType);
           }
           return null;
         ]]></body>
       </method>
       <!-- ::::::::::::: key handling ::::::::::::: -->
       <method name="onKeyPress">
         <parameter name="aEvent"/>
         <body><![CDATA[
           if (aEvent.target.localName != "textbox")
             return true; // Let child buttons of autocomplete take input
           //XXXpch this is so bogus...
           if (aEvent.defaultPrevented)
             return false;
           var cancel = false;
           // Catch any keys that could potentially move the caret. Ctrl can be
           // used in combination with these keys on Windows and Linux; and Alt
           // can be used on OS X, so make sure the unused one isn't used.
           if (!this.disableKeyNavigation &&
 #ifdef XP_MACOSX
               !aEvent.ctrlKey) {
 #else
               !aEvent.altKey) {
 #endif
             switch (aEvent.keyCode) {
               case KeyEvent.DOM_VK_LEFT:
               case KeyEvent.DOM_VK_RIGHT:
               case KeyEvent.DOM_VK_HOME:
                 cancel = this.mController.handleKeyNavigation(aEvent.keyCode);
                 break;
             }
           }
           // Handle keys that are not part of a keyboard shortcut (no Ctrl or Alt)
           if (!this.disableKeyNavigation && !aEvent.ctrlKey && !aEvent.altKey) {
             switch (aEvent.keyCode) {
               case KeyEvent.DOM_VK_TAB:
                 if (this.tabScrolling && this.popup.popupOpen)
                   cancel = this.mController.handleKeyNavigation(aEvent.shiftKey ?
                                                                 KeyEvent.DOM_VK_UP :
                                                                 KeyEvent.DOM_VK_DOWN);
                 else if (this.forceComplete && this.mController.matchCount >= 1)
                   this.mController.handleTab();
                 break;
               case KeyEvent.DOM_VK_UP:
               case KeyEvent.DOM_VK_DOWN:
               case KeyEvent.DOM_VK_PAGE_UP:
               case KeyEvent.DOM_VK_PAGE_DOWN:
                 cancel = this.mController.handleKeyNavigation(aEvent.keyCode);
                 break;
             }
           }
           // Handle keys we know aren't part of a shortcut, even with Alt or
           // Ctrl.
           switch (aEvent.keyCode) {
             case KeyEvent.DOM_VK_ESCAPE:
               cancel = this.mController.handleEscape();
               break;
             case KeyEvent.DOM_VK_RETURN:
 #ifdef XP_MACOSX
               // Prevent the default action, since it will beep on Mac
               if (aEvent.metaKey)
                 aEvent.preventDefault();
 #endif
               this.mEnterEvent = aEvent;
               cancel = this.mController.handleEnter(false);
               break;
             case KeyEvent.DOM_VK_DELETE:
 #ifdef XP_MACOSX
             case KeyEvent.DOM_VK_BACK_SPACE:
               if (aEvent.shiftKey)
 #endif
               cancel = this.mController.handleDelete();
               break;
             case KeyEvent.DOM_VK_DOWN:
             case KeyEvent.DOM_VK_UP:
               if (aEvent.altKey)
                 this.toggleHistoryPopup();
               break;
 #ifndef XP_MACOSX
             case KeyEvent.DOM_VK_F4:
               this.toggleHistoryPopup();
               break;
 #endif
           }
           if (cancel) {
             aEvent.stopPropagation();
             aEvent.preventDefault();
           }
           return true;
         ]]></body>
       </method>
       <!-- ::::::::::::: miscellaneous ::::::::::::: -->
       <method name="initSearchNames">
         <body><![CDATA[
           if (!this.mSearchNames) {
             var names = this.getAttribute("autocompletesearch");
             if (!names)
               this.mSearchNames = [];
             else
               this.mSearchNames = names.split(" ");
           }
         ]]></body>
       </method>
       <method name="_focus">
         <!-- doesn't reset this.mController -->
         <body><![CDATA[
           this._dontBlur = true;
           this.focus();
           this._dontBlur = false;
         ]]></body>
       </method>
       <method name="resetActionType">
         <body><![CDATA[
           if (this.mIgnoreInput)
             return;
           this.removeAttribute("actiontype");
         ]]></body>
       </method>
       <field name="_valueIsPasted">false</field>
       <field name="_pasteController"><![CDATA[
         ({
           _autocomplete: this,
           _kGlobalClipboard: Components.interfaces.nsIClipboard.kGlobalClipboard,
           supportsCommand: function(aCommand) aCommand == "cmd_paste",
           doCommand: function(aCommand) {
             this._autocomplete._valueIsPasted = true;
             this._autocomplete.editor.paste(this._kGlobalClipboard);
             this._autocomplete._valueIsPasted = false;
           },
           isCommandEnabled: function(aCommand) {
             return this._autocomplete.editor.isSelectionEditable &&
                    this._autocomplete.editor.canPaste(this._kGlobalClipboard);
           },
           onEvent: function() {}
         })
       ]]></field>
     </implementation>
     <handlers>
       <handler event="input"><![CDATA[
         if (!this.mIgnoreInput && this.mController.input == this) {
           this.valueIsTyped = true;
           this.mController.handleText();
         }
         this.resetActionType();
       ]]></handler>
       <handler event="keypress" phase="capturing"
                action="return this.onKeyPress(event);"/>
       <handler event="compositionstart" phase="capturing"
                action="if (this.mController.input == this) this.mController.handleStartComposition();"/>
       <handler event="compositionend" phase="capturing"
                action="if (this.mController.input == this) this.mController.handleEndComposition();"/>
       <handler event="focus" phase="capturing"
                action="this.attachController();"/>
       <handler event="blur" phase="capturing"
                action="if (!this._dontBlur) this.detachController();"/>
     </handlers>
   </binding>
   <binding id="autocomplete-result-popup" extends="chrome://global/content/bindings/autocomplete.xml#autocomplete-base-popup">
     <resources>
       <stylesheet src="chrome://global/skin/tree.css"/>
       <stylesheet src="chrome://global/skin/autocomplete.css"/>
     </resources>
     <content ignorekeys="true" level="top" consumeoutsideclicks="false">
       <xul:tree anonid="tree" class="autocomplete-tree plain" hidecolumnpicker="true" flex="1" seltype="single">
         <xul:treecols anonid="treecols">
           <xul:treecol id="treecolAutoCompleteValue" class="autocomplete-treecol" flex="1" overflow="true"/>
         </xul:treecols>
         <xul:treechildren class="autocomplete-treebody"/>
       </xul:tree>
     </content>
     <implementation>
       <field name="mShowCommentColumn">false</field>
       <field name="mShowImageColumn">false</field>
       <property name="showCommentColumn"
                    onget="return this.mShowCommentColumn;">
         <setter>
           <![CDATA[
           if (!val && this.mShowCommentColumn) {
             // reset the flex on the value column and remove the comment column
             document.getElementById("treecolAutoCompleteValue").setAttribute("flex", 1);
             this.removeColumn("treecolAutoCompleteComment");
           } else if (val && !this.mShowCommentColumn) {
             // reset the flex on the value column and add the comment column
             document.getElementById("treecolAutoCompleteValue").setAttribute("flex", 2);
             this.addColumn({id: "treecolAutoCompleteComment", flex: 1});
           }
           this.mShowCommentColumn = val;
           return val;
         ]]>
         </setter>
       </property>
       <property name="showImageColumn"
                 onget="return this.mShowImageColumn;">
         <setter>
           <![CDATA[
           if (!val && this.mShowImageColumn) {
             // remove the image column
             this.removeColumn("treecolAutoCompleteImage");
           } else if (val && !this.mShowImageColumn) {
             // add the image column
             this.addColumn({id: "treecolAutoCompleteImage", flex: 1});
           }
           this.mShowImageColumn = val;
           return val;
         ]]>
         </setter>
       </property>
       <method name="addColumn">
         <parameter name="aAttrs"/>
         <body>
           <![CDATA[
           var col = document.createElement("treecol");
           col.setAttribute("class", "autocomplete-treecol");
           for (var name in aAttrs)
             col.setAttribute(name, aAttrs[name]);
           this.treecols.appendChild(col);
           return col;
         ]]>
         </body>
       </method>
       <method name="removeColumn">
         <parameter name="aColId"/>
         <body>
           <![CDATA[
           return this.treecols.removeChild(document.getElementById(aColId));
         ]]>
         </body>
       </method>
       <property name="selectedIndex"
                 onget="return this.tree.currentIndex;">
         <setter>
           <![CDATA[
           this.tree.view.selection.select(val);
           if (this.tree.treeBoxObject.height > 0)
             this.tree.treeBoxObject.ensureRowIsVisible(val < 0 ? 0 : val);
           // Fire select event on xul:tree so that accessibility API
           // support layer can fire appropriate accessibility events.
           var event = document.createEvent('Events');
           event.initEvent("select", true, true);
           this.tree.dispatchEvent(event);
           return val;
         ]]></setter>
       </property>
       <method name="adjustHeight">
         <body>
           <![CDATA[
           // detect the desired height of the tree
           var bx = this.tree.treeBoxObject;
           var view = this.tree.view;
           if (!view)
             return;
           var rows = this.maxRows;
           if (!view.rowCount || (rows && view.rowCount < rows))
             rows = view.rowCount;
           var height = rows * bx.rowHeight;
           if (height == 0)
             this.tree.setAttribute("collapsed", "true");
           else {
             if (this.tree.hasAttribute("collapsed"))
               this.tree.removeAttribute("collapsed");
             this.tree.setAttribute("height", height);
           }
           this.tree.setAttribute("hidescrollbar", view.rowCount <= rows);
         ]]>
         </body>
       </method>
       <method name="openAutocompletePopup">
         <parameter name="aInput"/>
         <parameter name="aElement"/>
         <body><![CDATA[
           // until we have "baseBinding", (see bug #373652) this allows
           // us to override openAutocompletePopup(), but still call
           // the method on the base class
           this._openAutocompletePopup(aInput, aElement);
         ]]></body>
       </method>
       <method name="_openAutocompletePopup">
         <parameter name="aInput"/>
         <parameter name="aElement"/>
         <body><![CDATA[
           if (!this.mPopupOpen) {
             this.mInput = aInput;
             this.view = aInput.controller.QueryInterface(Components.interfaces.nsITreeView);
             this.invalidate();
             this.showCommentColumn = this.mInput.showCommentColumn;
             this.showImageColumn = this.mInput.showImageColumn;
             var rect = aElement.getBoundingClientRect();
             var nav = aElement.ownerDocument.defaultView.QueryInterface(Components.interfaces.nsIInterfaceRequestor)
                               .getInterface(Components.interfaces.nsIWebNavigation);
             var docShell = nav.QueryInterface(Components.interfaces.nsIDocShell);
             var docViewer = docShell.contentViewer.QueryInterface(Components.interfaces.nsIMarkupDocumentViewer);
             var width = (rect.right - rect.left) * docViewer.fullZoom;
             this.setAttribute("width", width > 100 ? width : 100);
             // Adjust the direction of the autocomplete popup list based on the textbox direction, bug 649840
             var popupDirection = aElement.ownerDocument.defaultView.getComputedStyle(aElement).direction;
             this.style.direction = popupDirection;
             this.openPopup(aElement, "after_start", 0, 0, false, false);
           }
         ]]></body>
       </method>
       <method name="invalidate">
         <body><![CDATA[
           this.adjustHeight();
           this.tree.treeBoxObject.invalidate();
         ]]></body>
       </method>
       <method name="selectBy">
         <parameter name="aReverse"/>
         <parameter name="aPage"/>
         <body><![CDATA[
           try {
             var amount = aPage ? 5 : 1;
             this.selectedIndex = this.getNextIndex(aReverse, amount, this.selectedIndex, this.tree.view.rowCount-1);
             if (this.selectedIndex == -1) {
               this.input._focus();
             }
           } catch (ex) {
             // do nothing - occasionally timer-related js errors happen here
             // e.g. "this.selectedIndex has no properties", when you type fast and hit a
             // navigation key before this popup has opened
           }
         ]]></body>
       </method>
       <!-- =================== PUBLIC MEMBERS =================== -->
       <field name="tree">
         document.getAnonymousElementByAttribute(this, "anonid", "tree");
       </field>
       <field name="treecols">
         document.getAnonymousElementByAttribute(this, "anonid", "treecols");
       </field>
       <property name="view"
                 onget="return this.mView;">
         <setter><![CDATA[
           // We must do this by hand because the tree binding may not be ready yet
           this.mView = val;
           var bx = this.tree.boxObject;
           bx = bx.QueryInterface(Components.interfaces.nsITreeBoxObject);
           bx.view = val;
         ]]></setter>
       </property>
     </implementation>
   </binding>
   <binding id="autocomplete-base-popup" role="none"
 extends="chrome://global/content/bindings/popup.xml#popup">
     <implementation implements="nsIAutoCompletePopup">
       <field name="mInput">null</field>
       <field name="mPopupOpen">false</field>
       <!-- =================== nsIAutoCompletePopup =================== -->
       <property name="input" readonly="true"
                 onget="return this.mInput"/>
       <property name="overrideValue" readonly="true"
                 onget="return null;"/>
       <property name="popupOpen" readonly="true"
                 onget="return this.mPopupOpen;"/>
       <method name="closePopup">
         <body>
           <![CDATA[
           if (this.mPopupOpen) {
             this.hidePopup();
             this.removeAttribute("width");
           }
         ]]>
         </body>
       </method>
       <!-- This is the default number of rows that we give the autocomplete
            popup when the textbox doesn't have a "maxrows" attribute
            for us to use. -->
       <field name="defaultMaxRows" readonly="true">6</field>
       <!-- In some cases (e.g. when the input's dropmarker button is clicked),
            the input wants to display a popup with more rows. In that case, it
            should increase its maxRows property and store the "normal" maxRows
            in this field. When the popup is hidden, we restore the input's
            maxRows to the value stored in this field.
            This field is set to -1 between uses so that we can tell when it's
            been set by the input and when we need to set it in the popupshowing
            handler. -->
       <field name="_normalMaxRows">-1</field>
       <property name="maxRows" readonly="true">
         <getter>
           <![CDATA[
           return (this.mInput && this.mInput.maxRows) || this.defaultMaxRows;
         ]]>
         </getter>
       </property>
       <method name="getNextIndex">
         <parameter name="aReverse"/>
         <parameter name="aAmount"/>
         <parameter name="aIndex"/>
         <parameter name="aMaxRow"/>
         <body><![CDATA[
           if (aMaxRow < 0)
             return -1;
           var newIdx = aIndex + (aReverse?-1:1)*aAmount;
           if (aReverse && aIndex == -1 || newIdx > aMaxRow && aIndex != aMaxRow)
             newIdx = aMaxRow;
           else if (!aReverse && aIndex == -1 || newIdx < 0 && aIndex != 0)
             newIdx = 0;
           if (newIdx < 0 && aIndex == 0 || newIdx > aMaxRow && aIndex == aMaxRow)
             aIndex = -1;
           else
             aIndex = newIdx;
           return aIndex;
         ]]></body>
       </method>
       <method name="onPopupClick">
         <parameter name="aEvent"/>
         <body><![CDATA[
           var controller = this.view.QueryInterface(Components.interfaces.nsIAutoCompleteController);
           controller.handleEnter(true);
         ]]></body>
       </method>
     </implementation>
     <handlers>
       <handler event="popupshowing"><![CDATA[
         // If normalMaxRows wasn't already set by the input, then set it here
         // so that we restore the correct number when the popup is hidden.
         if (this._normalMaxRows < 0)
           this._normalMaxRows = this.mInput.maxRows;
         this.mPopupOpen = true;
       ]]></handler>
       <handler event="popuphiding"><![CDATA[
         var isListActive = true;
         if (this.selectedIndex == -1)
           isListActive = false;
         var controller = this.view.QueryInterface(Components.interfaces.nsIAutoCompleteController);
         controller.stopSearch();
         this.mPopupOpen = false;
         // Reset the maxRows property to the cached "normal" value, and reset
         // _normalMaxRows so that we can detect whether it was set by the input
         // when the popupshowing handler runs.
         this.mInput.maxRows = this._normalMaxRows;
         this._normalMaxRows = -1;
         // If the list was being navigated and then closed, make sure
         // we fire accessible focus event back to textbox
         if (isListActive) {
           this.mInput.mIgnoreFocus = true;
           this.mInput._focus();
           this.mInput.mIgnoreFocus = false;
         }
       ]]></handler>
     </handlers>
   </binding>
   <binding id="autocomplete-rich-result-popup" extends="chrome://global/content/bindings/autocomplete.xml#autocomplete-base-popup">
     <resources>
       <stylesheet src="chrome://global/skin/autocomplete.css"/>
     </resources>
     <content ignorekeys="true" level="top" consumeoutsideclicks="false">
       <xul:richlistbox anonid="richlistbox" class="autocomplete-richlistbox" flex="1"/>
       <xul:hbox>
         <children/>
       </xul:hbox>
     </content>
     <implementation implements="nsIAutoCompletePopup">
       <field name="_currentIndex">0</field>
       <field name="_rowHeight">0</field>
       <!-- =================== nsIAutoCompletePopup =================== -->
       <property name="selectedIndex"
                 onget="return this.richlistbox.selectedIndex;">
         <setter>
           <![CDATA[
           this.richlistbox.selectedIndex = val;
           // when clearing the selection (val == -1, so selectedItem will be
           // null), we want to scroll back to the top.  see bug #406194
           this.richlistbox.ensureElementIsVisible(
             this.richlistbox.selectedItem || this.richlistbox.firstChild);
           return val;
         ]]>
         </setter>
       </property>
       <method name="openAutocompletePopup">
         <parameter name="aInput"/>
         <parameter name="aElement"/>
         <body>
           <![CDATA[
           // until we have "baseBinding", (see bug #373652) this allows
           // us to override openAutocompletePopup(), but still call
           // the method on the base class
           this._openAutocompletePopup(aInput, aElement);
         ]]>
         </body>
       </method>
       <method name="_openAutocompletePopup">
         <parameter name="aInput"/>
         <parameter name="aElement"/>
         <body>
           <![CDATA[
           if (!this.mPopupOpen) {
             this.mInput = aInput;
             // clear any previous selection, see bugs 400671 and 488357
             this.selectedIndex = -1;
             var width = aElement.getBoundingClientRect().width;
             this.setAttribute("width", width > 100 ? width : 100);
             // invalidate() depends on the width attribute
             this._invalidate();
             this.openPopup(aElement, "after_start", 0, 0, false, false);
           }
         ]]>
         </body>
       </method>
       <method name="invalidate">
         <body>
           <![CDATA[
           // Don't bother doing work if we're not even showing
           if (!this.mPopupOpen)
             return;
           this._invalidate();
           ]]>
         </body>
       </method>
       <method name="_invalidate">
         <body>
           <![CDATA[
           if (!this.hasAttribute("height")) {
             // collapsed if no matches
             this.richlistbox.collapsed = (this._matchCount == 0);
             // Dynamically update height until richlistbox.rows works (bug 401939)
             // Adjust the height immediately and after the row contents update
             this.adjustHeight();
             setTimeout(function(self) self.adjustHeight(), 0, this);
           }
           // make sure to collapse any existing richlistitems
           // that aren't going to be used
           var existingItemsCount = this.richlistbox.childNodes.length;
           for (var i = this._matchCount; i < existingItemsCount; i++)
             this.richlistbox.childNodes[i].collapsed = true;
           this._currentIndex = 0;
           this._appendCurrentResult();
         ]]>
         </body>
       </method>
       <property name="maxResults" readonly="true">
         <getter>
           <![CDATA[
             // this is how many richlistitems will be kept around
             // (note, this getter may be overridden)
             return 20;
           ]]>
         </getter>
       </property>
       <property name="_matchCount" readonly="true">
         <getter>
           <![CDATA[
           return Math.min(this.mInput.controller.matchCount, this.maxResults);
           ]]>
         </getter>
       </property>
       <method name="adjustHeight">
         <body>
           <![CDATA[
           // Figure out how many rows to show
           let rows = this.richlistbox.childNodes;
           let numRows = Math.min(this._matchCount, this.maxRows, rows.length);
           // Default the height to 0 if we have no rows to show
           let height = 0;
           if (numRows) {
             if (!this._rowHeight) {
               let firstRowRect = rows[0].getBoundingClientRect();
               this._rowHeight = firstRowRect.height;
             }
             // Calculate the height to have the first row to last row shown
             height = this._rowHeight * numRows;
           }
           // Only update the height if we have a non-zero height and if it
           // changed (the richlistbox is collapsed if there are no results)
           if (height && height != this.richlistbox.height)
             this.richlistbox.height = height;
           ]]>
         </body>
       </method>
       <method name="_appendCurrentResult">
         <body>
           <![CDATA[
           var controller = this.mInput.controller;
           var matchCount = this._matchCount;
           var existingItemsCount = this.richlistbox.childNodes.length;
           // Process maxRows per chunk to improve performance and user experience
           for (let i = 0; i < this.maxRows; i++) {
             if (this._currentIndex >= matchCount)
               return;
             var item;
             // trim the leading/trailing whitespace
             var trimmedSearchString = controller.searchString.replace(/^\s+/, "").replace(/\s+$/, "");
             // Unescape the URI spec for showing as an entry in the popup
             let url = Components.classes["@mozilla.org/intl/texttosuburi;1"].
               getService(Components.interfaces.nsITextToSubURI).
               unEscapeURIForUI("UTF-8", controller.getValueAt(this._currentIndex));
             if (typeof this.input.trimValue == "function")
               url = this.input.trimValue(url);
             if (this._currentIndex < existingItemsCount) {
               // re-use the existing item
               item = this.richlistbox.childNodes[this._currentIndex];
               // Completely re-use the existing richlistitem if it's the same
               if (item.getAttribute("text") == trimmedSearchString &&
                   item.getAttribute("url") == url) {
                 item.collapsed = false;
                 this._currentIndex++;
                 continue;
               }
             }
             else {
               // need to create a new item
               item = document.createElementNS("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul", "richlistitem");
             }
             // set these attributes before we set the class
             // so that we can use them from the constructor
             item.setAttribute("image", controller.getImageAt(this._currentIndex));
             item.setAttribute("url", url);
             item.setAttribute("title", controller.getCommentAt(this._currentIndex));
             item.setAttribute("type", controller.getStyleAt(this._currentIndex));
             item.setAttribute("text", trimmedSearchString);
             if (this._currentIndex < existingItemsCount) {
               // re-use the existing item
               item._adjustAcItem();
               item.collapsed = false;
             }
             else {
               // set the class at the end so we can use the attributes
               // in the xbl constructor
               item.className = "autocomplete-richlistitem";
               this.richlistbox.appendChild(item);
             }
             this._currentIndex++;
           }
           // yield after each batch of items so that typing the url bar is responsive
           setTimeout(function (self) { self._appendCurrentResult(); }, 0, this);
         ]]>
         </body>
       </method>
       <method name="selectBy">
         <parameter name="aReverse"/>
         <parameter name="aPage"/>
         <body>
           <![CDATA[
           try {
             var amount = aPage ? 5 : 1;
             // because we collapsed unused items, we can't use this.richlistbox.getRowCount(), we need to use the matchCount
             this.selectedIndex = this.getNextIndex(aReverse, amount, this.selectedIndex, this._matchCount - 1);
             if (this.selectedIndex == -1) {
               this.input._focus();
             }
           } catch (ex) {
             // do nothing - occasionally timer-related js errors happen here
             // e.g. "this.selectedIndex has no properties", when you type fast and hit a
             // navigation key before this popup has opened
           }
             ]]>
         </body>
       </method>
       <field name="richlistbox">
         document.getAnonymousElementByAttribute(this, "anonid", "richlistbox");
       </field>
       <property name="view"
                 onget="return this.mInput.controller;"
                 onset="return val;"/>
     </implementation>
   </binding>
   <binding id="autocomplete-richlistitem" extends="chrome://global/content/bindings/richlistbox.xml#richlistitem">
     <content>
       <xul:hbox align="center" class="ac-title-box">
         <xul:image xbl:inherits="src=image" class="ac-site-icon"/>
         <xul:hbox anonid="title-box" class="ac-title" flex="1"
                   onunderflow="_doUnderflow('_title');"
                   onoverflow="_doOverflow('_title');">
           <xul:description anonid="title" class="ac-normal-text ac-comment" xbl:inherits="selected"/>
         </xul:hbox>
         <xul:label anonid="title-overflow-ellipsis" xbl:inherits="selected"
                    class="ac-ellipsis-after ac-comment"/>
         <xul:hbox anonid="extra-box" class="ac-extra" align="center" hidden="true">
           <xul:image class="ac-result-type-tag"/>
           <xul:label class="ac-normal-text ac-comment" xbl:inherits="selected" value=":"/>
           <xul:description anonid="extra" class="ac-normal-text ac-comment" xbl:inherits="selected"/>
         </xul:hbox>
         <xul:image anonid="type-image" class="ac-type-icon"/>
       </xul:hbox>
       <xul:hbox align="center" class="ac-url-box">
         <xul:spacer class="ac-site-icon"/>
         <xul:image class="ac-action-icon"/>
         <xul:hbox anonid="url-box" class="ac-url" flex="1"
                   onunderflow="_doUnderflow('_url');"
                   onoverflow="_doOverflow('_url');">
           <xul:description anonid="url" class="ac-normal-text ac-url-text"
                            xbl:inherits="selected type"/>
           <xul:description anonid="action" class="ac-normal-text ac-action-text"
                            xbl:inherits="selected type"/>
         </xul:hbox>
         <xul:label anonid="url-overflow-ellipsis" xbl:inherits="selected"
                    class="ac-ellipsis-after ac-url-text"/>
         <xul:spacer class="ac-type-icon"/>
       </xul:hbox>
     </content>
     <implementation implements="nsIDOMXULSelectControlItemElement">
       <constructor>
         <![CDATA[
             let ellipsis = "\u2026";
             try {
               ellipsis = Components.classes["@mozilla.org/preferences-service;1"].
                 getService(Components.interfaces.nsIPrefBranch).
                 getComplexValue("intl.ellipsis",
                   Components.interfaces.nsIPrefLocalizedString).data;
             } catch (ex) {
               // Do nothing.. we already have a default
             }
             this._urlOverflowEllipsis = document.getAnonymousElementByAttribute(this, "anonid", "url-overflow-ellipsis");
             this._titleOverflowEllipsis = document.getAnonymousElementByAttribute(this, "anonid", "title-overflow-ellipsis");
             this._urlOverflowEllipsis.value = ellipsis;
             this._titleOverflowEllipsis.value = ellipsis;
             this._typeImage = document.getAnonymousElementByAttribute(this, "anonid", "type-image");
             this._urlBox = document.getAnonymousElementByAttribute(this, "anonid", "url-box");
             this._url = document.getAnonymousElementByAttribute(this, "anonid", "url");
             this._action = document.getAnonymousElementByAttribute(this, "anonid", "action");
             this._titleBox = document.getAnonymousElementByAttribute(this, "anonid", "title-box");
             this._title = document.getAnonymousElementByAttribute(this, "anonid", "title");
             this._extraBox = document.getAnonymousElementByAttribute(this, "anonid", "extra-box");
             this._extra = document.getAnonymousElementByAttribute(this, "anonid", "extra");
             this._adjustAcItem();
           ]]>
       </constructor>
       <property name="label" readonly="true">
         <getter>
           <![CDATA[
             var title = this.getAttribute("title");
             var url = this.getAttribute("url");
             var panel = this.parentNode.parentNode;
             // allow consumers that have extended popups to override
             // the label values for the richlistitems
             if (panel.createResultLabel)
               return panel.createResultLabel(title, url, this.getAttribute("type"));
             // aType (ex: "ac-result-type-<aType>") is related to the class of the image,
             // and is not "visible" text so don't use it for the label (for accessibility).
             return title + " " + url;
           ]]>
         </getter>
       </property>
       <field name="_boundaryCutoff">null</field>
       <property name="boundaryCutoff" readonly="true">
         <getter>
           <![CDATA[
           if (!this._boundaryCutoff) {
             this._boundaryCutoff =
               Components.classes["@mozilla.org/preferences-service;1"].
               getService(Components.interfaces.nsIPrefBranch).
               getIntPref("toolkit.autocomplete.richBoundaryCutoff");
           }
           return this._boundaryCutoff;
           ]]>
         </getter>
       </property>
       <method name="_getBoundaryIndices">
         <parameter name="aText"/>
         <parameter name="aSearchTokens"/>
         <body>
           <![CDATA[
           // Short circuit for empty search ([""] == "")
           if (aSearchTokens == "")
             return [0, aText.length];
           // Find which regions of text match the search terms
           let regions = [];
           for each (let search in aSearchTokens) {
             let matchIndex;
             let startIndex = 0;
             let searchLen = search.length;
             // Find all matches of the search terms, but stop early for perf
             let lowerText = aText.toLowerCase().substr(0, this.boundaryCutoff);
             while ((matchIndex = lowerText.indexOf(search, startIndex)) >= 0) {
               // Start the next search from where this one finished
               startIndex = matchIndex + searchLen;
               regions.push([matchIndex, startIndex]);
             }
           }
           // Sort the regions by start position then end position
           regions = regions.sort(function(a, b) let (start = a[0] - b[0])
             start == 0 ? a[1] - b[1] : start);
           // Generate the boundary indices from each region
           let start = 0;
           let end = 0;
           let boundaries = [];
           let len = regions.length;
           for (let i = 0; i < len; i++) {
             // We have a new boundary if the start of the next is past the end
             let region = regions[i];
             if (region[0] > end) {
               // First index is the beginning of match
               boundaries.push(start);
               // Second index is the beginning of non-match
               boundaries.push(end);
               // Track the new region now that we've stored the previous one
               start = region[0];
             }
             // Push back the end index for the current or new region
             end = Math.max(end, region[1]);
           }
           // Add the last region
           boundaries.push(start);
           boundaries.push(end);
           // Put on the end boundary if necessary
           if (end < aText.length)
             boundaries.push(aText.length);
           // Skip the first item because it's always 0
           return boundaries.slice(1);
           ]]>
         </body>
       </method>
       <method name="_getSearchTokens">
         <parameter name="aSearch"/>
         <body>
           <![CDATA[
           let search = aSearch.toLowerCase();
           return search.split(/\s+/);
           ]]>
         </body>
       </method>
       <method name="_setUpDescription">
         <parameter name="aDescriptionElement"/>
         <parameter name="aText"/>
         <parameter name="aNoEmphasis"/>
         <body>
           <![CDATA[
           // Get rid of all previous text
           while (aDescriptionElement.hasChildNodes())
             aDescriptionElement.removeChild(aDescriptionElement.firstChild);
           // If aNoEmphasis is specified, don't add any emphasis
           if (aNoEmphasis) {
             aDescriptionElement.appendChild(document.createTextNode(aText));
             return;
           }
           // Get the indices that separate match and non-match text
           let search = this.getAttribute("text");
           let tokens = this._getSearchTokens(search);
           let indices = this._getBoundaryIndices(aText, tokens);
           let next;
           let start = 0;
           let len = indices.length;
           // Even indexed boundaries are matches, so skip the 0th if it's empty
           for (let i = indices[0] == 0 ? 1 : 0; i < len; i++) {
             next = indices[i];
             let text = aText.substr(start, next - start);
             start = next;
             if (i % 2 == 0) {
               // Emphasize the text for even indices
               let span = aDescriptionElement.appendChild(
                 document.createElementNS("http://www.w3.org/1999/xhtml", "span"));
               span.className = "ac-emphasize-text";
               span.textContent = text;
             } else {
               // Otherwise, it's plain text
               aDescriptionElement.appendChild(document.createTextNode(text));
             }
           }
           ]]>
         </body>
       </method>
       <method name="_adjustAcItem">
         <body>
           <![CDATA[
           var url = this.getAttribute("url");
           var title = this.getAttribute("title");
           var type = this.getAttribute("type");
           this.removeAttribute("actiontype");
           // The ellipses are hidden via their visibility so that they always
           // take up space and don't pop in on top of text when shown.  For
           // keyword searches, however, the title ellipsis should not take up
           // space when hidden.  Setting the hidden property accomplishes that.
           this._titleOverflowEllipsis.hidden = false;
           // If the type includes an action, set up the item appropriately.
           var types = type.split(/\s+/);
           var actionIndex = types.indexOf("action");
           if (actionIndex >= 0) {
             let [,action, param] = url.match(/^moz-action:([^,]+),(.*)$/);
             this.setAttribute("actiontype", action);
             url = param;
             let desc = "]]>&action.switchToTab.label;<![CDATA[";
             this._setUpDescription(this._action, desc, true);
             // Remove the "action" substring so that the correct style, if any,
             // is applied below.
             types.splice(actionIndex, 1);
             type = types.join(" ");
           }
           // If we have a tag match, show the tags and icon
           if (type == "tag") {
             // Configure the extra box for tags display
             this._extraBox.hidden = false;
             this._extraBox.childNodes[0].hidden = false;
             this._extraBox.childNodes[1].hidden = true;
             this._extraBox.pack = "end";
             this._titleBox.flex = 1;
             // The title is separated from the tags by an endash
             let tags;
             [, title, tags] = title.match(/^(.+) \u2013 (.+)$/);
             // Each tag is split by a comma in an undefined order, so sort it
             let sortedTags = tags.split(",").sort().join(", ");
             // Emphasize the matching text in the tags
             this._setUpDescription(this._extra, sortedTags);
             // Treat tagged matches as bookmarks for the star
             type = "bookmark";
           } else if (type == "keyword") {
             // Configure the extra box for keyword display
             this._extraBox.hidden = false;
             this._extraBox.childNodes[0].hidden = true;
             this._extraBox.childNodes[1].hidden = false;
             this._extraBox.pack = "start";
             this._titleBox.flex = 0;
             // Hide the ellipsis so it doesn't take up space.
             this._titleOverflowEllipsis.hidden = true;
             // Put the parameters next to the title if we have any
             let search = this.getAttribute("text");
             let params = "";
             let paramsIndex = search.indexOf(' ');
             if (paramsIndex != -1)
               params = search.substr(paramsIndex + 1);
             // Emphasize the keyword parameters
             this._setUpDescription(this._extra, params);
             // Don't emphasize keyword searches in the title or url
             this.setAttribute("text", "");
           } else {
             // Hide the title's extra box if we don't need extra stuff
             this._extraBox.hidden = true;
             this._titleBox.flex = 1;
           }
           // Give the image the icon style and a special one for the type
           this._typeImage.className = "ac-type-icon" +
             (type ? " ac-result-type-" + type : "");
           // Show the url as the title if we don't have a title
           if (title == "")
             title = url;
           // Emphasize the matching search terms for the description
           this._setUpDescription(this._title, title);
           this._setUpDescription(this._url, url);
           // Set up overflow on a timeout because the contents of the box
           // might not have a width yet even though we just changed them
           setTimeout(this._setUpOverflow, 0, this._titleBox, this._titleOverflowEllipsis);
           setTimeout(this._setUpOverflow, 0, this._urlBox, this._urlOverflowEllipsis);
           ]]>
         </body>
       </method>
       <method name="_setUpOverflow">
         <parameter name="aParentBox"/>
         <parameter name="aEllipsis"/>
         <body>
           <![CDATA[
           // Hide the ellipsis incase there's just enough to not underflow
           aEllipsis.style.visibility = "hidden";
           // Start with the parent's width and subtract off its children
           let tooltip = [];
           let children = aParentBox.childNodes;
           let widthDiff = aParentBox.boxObject.width;
           for (let i = 0; i < children.length; i++) {
             // Only consider a child if it actually takes up space
             let childWidth = children[i].boxObject.width;
             if (childWidth > 0) {
               // Subtract a little less to account for subpixel rounding
               widthDiff -= childWidth - .5;
               // Add to the tooltip if it's not hidden and has text
               let childText = children[i].textContent;
               if (childText)
                 tooltip.push(childText);
             }
           }
           // If the children take up more space than the parent.. overflow!
           if (widthDiff < 0) {
             // Re-show the ellipsis now that we know it's needed
             aEllipsis.style.visibility = "visible";
             // Separate text components with a ndash --
             aParentBox.tooltipText = tooltip.join(" \u2013 ");
           }
           ]]>
         </body>
       </method>
       <method name="_doUnderflow">
         <parameter name="aName"/>
         <body>
           <![CDATA[
           // Hide the ellipsis right when we know we're underflowing instead of
           // waiting for the timeout to trigger the _setUpOverflow calculations
           this[aName + "Box"].tooltipText = "";
           this[aName + "OverflowEllipsis"].style.visibility = "hidden";
           ]]>
         </body>
       </method>
       <method name="_doOverflow">
         <parameter name="aName"/>
         <body>
           <![CDATA[
           this._setUpOverflow(this[aName + "Box"],
                               this[aName + "OverflowEllipsis"]);
           ]]>
         </body>
       </method>
     </implementation>
   </binding>
   <binding id="autocomplete-tree" extends="chrome://global/content/bindings/tree.xml#tree">
     <content>
       <children includes="treecols"/>
       <xul:treerows class="autocomplete-treerows tree-rows" xbl:inherits="hidescrollbar" flex="1">
         <children/>
       </xul:treerows>
     </content>
   </binding>
   <binding id="autocomplete-richlistbox" extends="chrome://global/content/bindings/richlistbox.xml#richlistbox">
     <implementation>
       <field name="mLastMoveTime">Date.now()</field>
     </implementation>
     <handlers>
       <handler event="mouseup">
         <![CDATA[
         // don't call onPopupClick for the scrollbar buttons, thumb, slider, etc.
         var item = event.originalTarget;
         while (item && item.localName != "richlistitem")
           item = item.parentNode;
         if (!item)
           return;
         this.parentNode.onPopupClick(event);
       ]]>
       </handler>
       <handler event="mousemove">
         <![CDATA[
         if (Date.now() - this.mLastMoveTime > 30) {
          var item = event.target;
          while (item && item.localName != "richlistitem")
            item = item.parentNode;
          if (!item)
            return;
          var rc = this.getIndexOfItem(item);
          if (rc != this.selectedIndex)
             this.selectedIndex = rc;
          this.mLastMoveTime = Date.now();
         }
       ]]>
       </handler>
     </handlers>
   </binding>
   <binding id="autocomplete-treebody">
     <implementation>
       <field name="mLastMoveTime">Date.now()</field>
     </implementation>
     <handlers>
       <handler event="mouseup" action="this.parentNode.parentNode.onPopupClick(event);"/>
       <handler event="mousedown"><![CDATA[
          var rc = this.parentNode.treeBoxObject.getRowAt(event.clientX, event.clientY);
          if (rc != this.parentNode.currentIndex)
             this.parentNode.view.selection.select(rc);
       ]]></handler>
       <handler event="mousemove"><![CDATA[
         if (Date.now() - this.mLastMoveTime > 30) {
          var rc = this.parentNode.treeBoxObject.getRowAt(event.clientX, event.clientY);
          if (rc != this.parentNode.currentIndex)
             this.parentNode.view.selection.select(rc);
          this.mLastMoveTime = Date.now();
         }
       ]]></handler>
     </handlers>
   </binding>
   <binding id="autocomplete-treerows">
     <content>
       <xul:hbox flex="1" class="tree-bodybox">
         <children/>
       </xul:hbox>
       <xul:scrollbar xbl:inherits="collapsed=hidescrollbar" orient="vertical" class="tree-scrollbar"/>
     </content>
   </binding>
   <binding id="history-dropmarker" extends="chrome://global/content/bindings/general.xml#dropmarker">
     <implementation>
       <method name="showPopup">
         <body><![CDATA[
           var textbox = document.getBindingParent(this);
           textbox.showHistoryPopup();
         ]]></body>
       </method>
     </implementation>
     <handlers>
       <handler event="mousedown" button="0"><![CDATA[
         this.showPopup();
       ]]></handler>
     </handlers>
   </binding>
 </bindings>

The Tor Browser / annotate

toolkit/content/widgets/autocomplete.xml@6474c204b198 (annotated)

toolkit/content/widgets/autocomplete.xml