path: root/toolkit/content/widgets/autocomplete.xml

<?xml version="1.0"?>
<!-- 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/. -->

<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/content/autocomplete.css"/>
      <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=inputtype,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="_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">null</field>
      <property name="popup" readonly="true">
        <getter><![CDATA[
          // Memoize the result in a field rather than replacing this property,
          // so that it can be reset along with the binding.
          if (this._popup) {
            return this._popup;
          }

          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;

          return this._popup = popup;
        ]]></getter>
      </property>

      <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="shrinkDelay" readonly="true">
        parseInt(this.getAttribute("shrinkdelay")) || 0
      </field>

      <property name="PrivateBrowsingUtils" readonly="true">
        <getter><![CDATA[
          let module = {};
          Components.utils.import("resource://gre/modules/PrivateBrowsingUtils.jsm", module);
          Object.defineProperty(this, "PrivateBrowsingUtils", {
            configurable: true,
            enumerable: true,
            writable: true,
            value: module.PrivateBrowsingUtils
          });
          return module.PrivateBrowsingUtils;
        ]]></getter>
      </property>

      <property name="inPrivateContext" readonly="true"
                onget="return this.PrivateBrowsingUtils.isWindowPrivate(window);"/>

      <property name="noRollupOnCaretMove" readonly="true"
                onget="return this.popup.getAttribute('norolluponanchor') == 'true'"/>

      <!-- 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>

      <method name="setTextValueWithReason">
        <parameter name="aValue"/>
        <parameter name="aReason"/>
        <body><![CDATA[
          if (aReason == Components.interfaces.nsIAutoCompleteInput
                                   .TEXTVALUE_REASON_COMPLETEDEFAULT) {
            this._disableTrim = true;
          }
          this.textValue = aValue;
          this._disableTrim = false;
        ]]></body>
      </method>

      <property name="textValue">
        <getter><![CDATA[
          if (typeof this.onBeforeTextValueGet == "function") {
            let result = this.onBeforeTextValueGet();
            if (result) {
              return result.value;
            }
          }
          return this.value;
        ]]></getter>
        <setter><![CDATA[
          if (typeof this.onBeforeTextValueSet == "function")
            val = this.onBeforeTextValueSet(val);

          this.value = val;

          // Completing a result should simulate the user typing the result, so
          // fire an input event.
          let 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.popup && typeof this.popup.onSearchBegin == "function")
            this.popup.onSearchBegin();
          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.ignoreBlurWhileSearching && !this.focused) {
            this.handleEnter();
            this.detachController();
          }

          if (this._searchCompleteHandler)
            this._searchCompleteHandler();
        ]]></body>
      </method>

      <method name="onTextEntered">
        <parameter name="event"/>
        <body><![CDATA[
          let rv = false;
          if (this._textEnteredHandler) {
            rv = this._textEnteredHandler(event);
          }
          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="this.setAttribute('tabscrolling', val); return val;"
                onget="return this.getAttribute('tabscrolling') == 'true';"/>

      <!-- option to completely ignore any blur events while searches are
           still going on. -->
      <property name="ignoreBlurWhileSearching"
                onset="this.setAttribute('ignoreblurwhilesearching', val); return val;"
                onget="return this.getAttribute('ignoreblurwhilesearching') == '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 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[
          if (this.mController.input == this)
            this.mController.input = null;
        ]]></body>
      </method>

      <!-- ::::::::::::: popup opening ::::::::::::: -->

      <method name="openPopup">
        <body><![CDATA[
          if (this.focused)
            this.popup.openAutocompletePopup(this, this);
        ]]></body>
      </method>

      <method name="closePopup">
        <body><![CDATA[
          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.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.attachController();
          this.mController.startSearch("");
        ]]></body>
      </method>

      <method name="toggleHistoryPopup">
        <body><![CDATA[
          // If this method is called on the same event tick as the popup gets
          // hidden, do nothing to avoid re-opening the popup when the drop
          // marker is clicked while the popup is still open.
          if (!this.popup.isPopupHidingTick && !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 ::::::::::::: -->

      <field name="_selectionDetails">null</field>
      <method name="onKeyPress">
        <parameter name="aEvent"/>
        <body><![CDATA[
          return this.handleKeyPress(aEvent);
        ]]></body>
      </method>

      <method name="handleKeyPress">
        <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.
          let metaKey = /Mac/.test(navigator.platform) ? aEvent.ctrlKey : aEvent.altKey;
          if (!this.disableKeyNavigation && !metaKey) {
            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:
              if (/Mac/.test(navigator.platform)) {
                // Prevent the default action, since it will beep on Mac
                if (aEvent.metaKey)
                  aEvent.preventDefault();
              }
              if (this.mController.selection) {
                this._selectionDetails = {
                  index: this.mController.selection.currentIndex,
                  kind: "key"
                };
              }
              cancel = this.handleEnter(aEvent);
              break;
            case KeyEvent.DOM_VK_DELETE:
              if (/Mac/.test(navigator.platform) && !aEvent.shiftKey) {
                break;
              }
              cancel = this.handleDelete();
              break;
            case KeyEvent.DOM_VK_BACK_SPACE:
              if (/Mac/.test(navigator.platform) && aEvent.shiftKey) {
                cancel = this.handleDelete();
              }
              break;
            case KeyEvent.DOM_VK_DOWN:
            case KeyEvent.DOM_VK_UP:
              if (aEvent.altKey)
                this.toggleHistoryPopup();
              break;
            case KeyEvent.DOM_VK_F4:
              if (!/Mac/.test(navigator.platform)) {
                this.toggleHistoryPopup();
              }
              break;
          }

          if (cancel) {
            aEvent.stopPropagation();
            aEvent.preventDefault();
          }

          return true;
        ]]></body>
      </method>

      <method name="handleEnter">
        <parameter name="event"/>
        <body><![CDATA[
          return this.mController.handleEnter(false, event || null);
        ]]></body>
      </method>

      <method name="handleDelete">
        <body><![CDATA[
          return this.mController.handleDelete();
        ]]></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: 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>

      <method name="onInput">
        <parameter name="aEvent"/>
        <body><![CDATA[
          if (!this.mIgnoreInput && this.mController.input == this) {
            this.valueIsTyped = true;
            this.mController.handleText();
          }
          this.resetActionType();
        ]]></body>
      </method>
    </implementation>

    <handlers>
      <handler event="input"><![CDATA[
        this.onInput(event);
      ]]></handler>

      <handler event="keypress" phase="capturing" group="system"
               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"><![CDATA[
        this.attachController();
        if (window.gBrowser && window.gBrowser.selectedBrowser.hasAttribute("usercontextid")) {
          this.userContextId = parseInt(window.gBrowser.selectedBrowser.getAttribute("usercontextid"));
        } else {
          this.userContextId = 0;
        }
      ]]></handler>

      <handler event="blur" phase="capturing"><![CDATA[
        if (!this._dontBlur) {
          if (this.forceComplete && this.mController.matchCount >= 1) {
            // mousemove sets selected index. Don't blindly use that selected
            // index in this blur handler since if the popup is open you can
            // easily "select" another match just by moving the mouse over it.
            let filledVal = this.value.replace(/.+ >> /, "").toLowerCase();
            let selectedVal = null;
            if (this.popup.selectedIndex >= 0) {
              selectedVal = this.mController.getFinalCompleteValueAt(
                this.popup.selectedIndex);
            }
            if (selectedVal && filledVal != selectedVal.toLowerCase()) {
              for (let i = 0; i < this.mController.matchCount; i++) {
                let matchVal = this.mController.getFinalCompleteValueAt(i);
                if (matchVal.toLowerCase() == filledVal) {
                  this.popup.selectedIndex = i;
                  break;
                }
              }
            }
            this.mController.handleEnter(false);
          }
          if (!this.ignoreBlurWhileSearching)
            this.detachController();
        }
      ]]></handler>
    </handlers>
  </binding>

  <binding id="autocomplete-result-popup" extends="chrome://global/content/bindings/autocomplete.xml#autocomplete-base-popup">
    <resources>
      <stylesheet src="chrome://global/content/autocomplete.css"/>
      <stylesheet src="chrome://global/skin/tree.css"/>
      <stylesheet src="chrome://global/skin/autocomplete.css"/>
    </resources>

    <content ignorekeys="true" level="top" consumeoutsideclicks="never">
      <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[
          if (!this.tree.view) {
            // We don't have a view? return "no selection".
            val = -1;
          } else {
            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;
            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;
          this.tree.boxObject.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>
      <field name="mIsPopupHidingTick">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;"/>

      <property name="isPopupHidingTick" readonly="true"
                onget="return this.mIsPopupHidingTick;"/>

      <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, aEvent);
        ]]></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.

        // Null-check this.mInput; see bug 1017914
        if (this._normalMaxRows < 0 && this.mInput) {
          this._normalMaxRows = this.mInput.maxRows;
        }

        // Set an attribute for styling the popup based on the input.
        let inputID = "";
        if (this.mInput && this.mInput.ownerDocument &&
            this.mInput.ownerDocument.documentURIObject.schemeIs("chrome")) {
          inputID = this.mInput.id;
          // Take care of elements with no id that are inside xbl bindings
          if (!inputID) {
            let bindingParent = this.mInput.ownerDocument.getBindingParent(this.mInput);
            if (bindingParent) {
              inputID = bindingParent.id;
            }
          }
        }
        this.setAttribute("autocompleteinput", inputID);

        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.removeAttribute("autocompleteinput");
        this.mPopupOpen = false;

        // Prevent opening popup from historydropmarker mousedown handler
        // on the same event tick the popup is hidden by the same mousedown
        // event.
        this.mIsPopupHidingTick = true;
        setTimeout(() => {
          this.mIsPopupHidingTick = false;
        }, 0);

        // 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.

        // Null-check this.mInput; see bug 1017914
        if (this.mInput)
          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

        // Null-check this.mInput; see bug 1017914
        if (isListActive && this.mInput) {
          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/content/autocomplete.css"/>
      <stylesheet src="chrome://global/skin/autocomplete.css"/>
    </resources>

    <content ignorekeys="true" level="top" consumeoutsideclicks="never">
      <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="_rlbAnimated">false</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="onSearchBegin">
        <body><![CDATA[
          this.richlistbox.mouseSelectedIndex = -1;

          if (typeof this._onSearchBegin == "function") {
            this._onSearchBegin();
          }
        ]]></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) {
            // It's possible that the panel is hidden initially
            // to avoid impacting startup / new window performance
            aInput.popup.hidden = false;

            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">
        <parameter name="reason"/>
        <body>
          <![CDATA[
          // Don't bother doing work if we're not even showing
          if (!this.mPopupOpen)
            return;

          this._invalidate(reason);
          ]]>
        </body>
      </method>

      <method name="_invalidate">
        <parameter name="reason"/>
        <body>
          <![CDATA[
          // collapsed if no matches
          this.richlistbox.collapsed = (this._matchCount == 0);

          // Update the richlistbox height.
          if (this._adjustHeightTimeout) {
            clearTimeout(this._adjustHeightTimeout);
          }
          if (this._shrinkTimeout) {
            clearTimeout(this._shrinkTimeout);
          }

          if (this.mPopupOpen) {
            delete this._adjustHeightOnPopupShown;
            this._adjustHeightTimeout = setTimeout(() => this.adjustHeight(), 0);
          } else {
            this._adjustHeightOnPopupShown = true;
          }

          this._currentIndex = 0;
          if (this._appendResultTimeout) {
            clearTimeout(this._appendResultTimeout);
          }
          this._appendCurrentResult(reason);
        ]]>
        </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="_collapseUnusedItems">
        <body>
          <![CDATA[
            let existingItemsCount = this.richlistbox.childNodes.length;
            for (let i = this._matchCount; i < existingItemsCount; ++i) {
              this.richlistbox.childNodes[i].collapsed = true;
            }
          ]]>
        </body>
      </method>

      <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);

          this.removeAttribute("height");

          // Default the height to 0 if we have no rows to show
          let height = 0;
          if (numRows) {
            let firstRowRect = rows[0].getBoundingClientRect();
            if (this._rlbPadding == undefined) {
              let style = window.getComputedStyle(this.richlistbox);

              let transition = style.transitionProperty;
              this._rlbAnimated = transition && transition != "none";

              let paddingTop = parseInt(style.paddingTop) || 0;
              let paddingBottom = parseInt(style.paddingBottom) || 0;
              this._rlbPadding = paddingTop + paddingBottom;
            }

            if (numRows > this.maxRows) {
              // Set a fixed max-height to avoid flicker when growing the panel.
              let lastVisibleRowRect = rows[this.maxRows - 1].getBoundingClientRect();
              let visibleHeight = lastVisibleRowRect.bottom - firstRowRect.top;
              this.richlistbox.style.maxHeight =
                visibleHeight + this._rlbPadding + "px";
            }

            // The class `forceHandleUnderflow` is for the item might need to
            // handle OverUnderflow or Overflow when the height of an item will
            // be changed dynamically.
            for (let i = 0; i < numRows; i++) {
              if (rows[i].classList.contains("forceHandleUnderflow")) {
                rows[i].handleOverUnderflow();
              }
            }

            let lastRowRect = rows[numRows - 1].getBoundingClientRect();
            // Calculate the height to have the first row to last row shown
            height = lastRowRect.bottom - firstRowRect.top +
                     this._rlbPadding;
          }

          let animate = this._rlbAnimated &&
                        this.getAttribute("dontanimate") != "true";
          let currentHeight = this.richlistbox.getBoundingClientRect().height;
          if (height > currentHeight) {
            // Grow immediately.
            if (animate) {
              this.richlistbox.removeAttribute("height");
              this.richlistbox.style.height = height + "px";
            } else {
              this.richlistbox.style.removeProperty("height");
              this.richlistbox.height = height;
            }
          } else {
            // Delay shrinking to avoid flicker.
            this._shrinkTimeout = setTimeout(() => {
              this._collapseUnusedItems();
              if (animate) {
                this.richlistbox.removeAttribute("height");
                this.richlistbox.style.height = height + "px";
              } else {
                this.richlistbox.style.removeProperty("height");
                this.richlistbox.height = height;
              }
            }, this.mInput.shrinkDelay);
          }
          ]]>
        </body>
      </method>

      <method name="_appendCurrentResult">
        <parameter name="invalidateReason"/>
        <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)
              break;

            var item;

            // trim the leading/trailing whitespace
            var trimmedSearchString = controller.searchString.replace(/^\s+/, "").replace(/\s+$/, "");

            let url = controller.getValueAt(this._currentIndex);

            if (this._currentIndex < existingItemsCount) {
              // re-use the existing item
              item = this.richlistbox.childNodes[this._currentIndex];
              item.setAttribute("dir", this.style.direction);

              // Completely reuse the existing richlistitem for invalidation
              // due to new results, but only when: the item is the same, *OR*
              // we are about to replace the currently mouse-selected item, to
              // avoid surprising the user.
              let iface = Components.interfaces.nsIAutoCompletePopup;
              if (item.getAttribute("text") == trimmedSearchString &&
                  invalidateReason == iface.INVALIDATE_REASON_NEW_RESULT &&
                  (item.getAttribute("url") == url ||
                   this.richlistbox.mouseSelectedIndex === this._currentIndex)) {
                // Additionally, if the item is a searchengine action, then it
                // should only be reused if the engine name is the same as the
                // popup's override engine name, if any.
                let action = item._parseActionUrl(url);
                if (!action ||
                    action.type != "searchengine" ||
                    !this.overrideSearchEngineName ||
                    action.params.engineName == this.overrideSearchEngineName) {
                  item.collapsed = false;
                  // Call adjustSiteIconStart only after setting collapsed=
                  // false.  The calculations it does may be wrong otherwise.
                  item.adjustSiteIconStart(this._siteIconStart);
                  // The popup may have changed size between now and the last
                  // time the item was shown, so always handle over/underflow.
                  item.handleOverUnderflow();
                  this._currentIndex++;
                  continue;
                }
              }
            }
            else {
              // need to create a new item
              item = document.createElementNS("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul", "richlistitem");
              item.setAttribute("dir", this.style.direction);
            }

            // set these attributes before we set the class
            // so that we can use them from the constructor
            let iconURI = controller.getImageAt(this._currentIndex);
            item.setAttribute("image", iconURI);
            item.setAttribute("url", url);
            item.setAttribute("title", controller.getCommentAt(this._currentIndex));
            item.setAttribute("originaltype", 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);
            }

            // The binding may have not been applied yet.
            setTimeout(() => {
              let changed = item.adjustSiteIconStart(this._siteIconStart);
              if (changed) {
                item.handleOverUnderflow();
              }
            }, 0);

            this._currentIndex++;
          }

          if (typeof this.onResultsAdded == "function")
            this.onResultsAdded();

          if (this._currentIndex < matchCount) {
            // yield after each batch of items so that typing the url bar is
            // responsive
            this._appendResultTimeout = setTimeout(() => this._appendCurrentResult(), 0);
          }
        ]]>
        </body>
      </method>

      <!-- The x-coordinate relative to the leading edge of the window of the
           items' site icons (favicons). -->
      <property name="siteIconStart"
                onget="return this._siteIconStart;">
        <setter>
          <![CDATA[
          if (val != this._siteIconStart) {
            this._siteIconStart = val;
            for (let item of this.richlistbox.childNodes) {
              let changed = item.adjustSiteIconStart(val);
              if (changed) {
                item.handleOverUnderflow();
              }
            }
          }
          return val;
          ]]>
        </setter>
      </property>

      <property name="overflowPadding"
                onget="return Number(this.getAttribute('overflowpadding'))"
                readonly="true" />

      <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>
    <handlers>
      <handler event="popupshown">
        <![CDATA[
          if (this._adjustHeightOnPopupShown) {
            delete this._adjustHeightOnPopupShown;
            this.adjustHeight();
          }
      ]]>
      </handler>
    </handlers>
  </binding>

  <binding id="autocomplete-richlistitem-insecure-field" extends="chrome://global/content/bindings/autocomplete.xml#autocomplete-richlistitem">
    <content align="center"
             onoverflow="this._onOverflow();"
             onunderflow="this._onUnderflow();">
      <xul:image anonid="type-icon"
                 class="ac-type-icon"
                 xbl:inherits="selected,current,type"/>
      <xul:image anonid="site-icon"
                 class="ac-site-icon"
                 xbl:inherits="src=image,selected,type"/>
      <xul:vbox class="ac-title"
                align="left"
                xbl:inherits="">
        <xul:description class="ac-text-overflow-container">
          <xul:description anonid="title-text"
                           class="ac-title-text"
                           xbl:inherits="selected"/>
        </xul:description>
      </xul:vbox>
      <xul:hbox anonid="tags"
                class="ac-tags"
                align="center"
                xbl:inherits="selected">
        <xul:description class="ac-text-overflow-container">
          <xul:description anonid="tags-text"
                           class="ac-tags-text"
                           xbl:inherits="selected"/>
        </xul:description>
      </xul:hbox>
      <xul:hbox anonid="separator"
                class="ac-separator"
                align="center"
                xbl:inherits="selected,actiontype,type">
        <xul:description class="ac-separator-text">—</xul:description>
      </xul:hbox>
      <xul:hbox class="ac-url"
                align="center"
                xbl:inherits="selected,actiontype">
        <xul:description class="ac-text-overflow-container">
          <xul:description anonid="url-text"
                           class="ac-url-text"
                           xbl:inherits="selected"/>
        </xul:description>
      </xul:hbox>
      <xul:hbox class="ac-action"
                align="center"
                xbl:inherits="selected,actiontype">
        <xul:description class="ac-text-overflow-container">
          <xul:description anonid="action-text"
                           class="ac-action-text"
                           xbl:inherits="selected"/>
        </xul:description>
      </xul:hbox>
    </content>

    <handlers>
      <handler event="click" button="0"><![CDATA[
        let baseURL = Services.urlFormatter.formatURLPref("app.support.baseURL");
        window.openUILinkIn(baseURL + "insecure-password", "tab", {
          relatedToCurrent: true,
        });
      ]]></handler>
    </handlers>

    <implementation>
      <constructor><![CDATA[
        // Unlike other autocomplete items, the height of the insecure warning
        // increases by wrapping. So "forceHandleUnderflow" is for container to
        // recalculate an item's height and width.
        this.classList.add("forceHandleUnderflow");
      ]]></constructor>

      <property name="_learnMoreString">
        <getter><![CDATA[
          if (!this.__learnMoreString) {
            this.__learnMoreString =
              Services.strings.createBundle("chrome://passwordmgr/locale/passwordmgr.properties").
              GetStringFromName("insecureFieldWarningLearnMore");
          }
          return this.__learnMoreString;
        ]]></getter>
      </property>

      <method name="_getSearchTokens">
        <parameter name="aSearch"/>
        <body>
          <![CDATA[
            return [this._learnMoreString.toLowerCase()];
          ]]>
        </body>
      </method>

    </implementation>
  </binding>

  <binding id="autocomplete-richlistitem" extends="chrome://global/content/bindings/richlistbox.xml#richlistitem">

    <content align="center"
             onoverflow="this._onOverflow();"
             onunderflow="this._onUnderflow();">
      <xul:image anonid="type-icon"
                 class="ac-type-icon"
                 xbl:inherits="selected,current,type"/>
      <xul:image anonid="site-icon"
                 class="ac-site-icon"
                 xbl:inherits="src=image,selected,type"/>
      <xul:hbox class="ac-title"
                align="center"
                xbl:inherits="selected">
        <xul:description class="ac-text-overflow-container">
          <xul:description anonid="title-text"
                           class="ac-title-text"
                           xbl:inherits="selected"/>
        </xul:description>
      </xul:hbox>
      <xul:hbox anonid="tags"
                class="ac-tags"
                align="center"
                xbl:inherits="selected">
        <xul:description class="ac-text-overflow-container">
          <xul:description anonid="tags-text"
                           class="ac-tags-text"
                           xbl:inherits="selected"/>
        </xul:description>
      </xul:hbox>
      <xul:hbox anonid="separator"
                class="ac-separator"
                align="center"
                xbl:inherits="selected,actiontype,type">
        <xul:description class="ac-separator-text">—</xul:description>
      </xul:hbox>
      <xul:hbox class="ac-url"
                align="center"
                xbl:inherits="selected,actiontype">
        <xul:description class="ac-text-overflow-container">
          <xul:description anonid="url-text"
                           class="ac-url-text"
                           xbl:inherits="selected"/>
        </xul:description>
      </xul:hbox>
      <xul:hbox class="ac-action"
                align="center"
                xbl:inherits="selected,actiontype">
        <xul:description class="ac-text-overflow-container">
          <xul:description anonid="action-text"
                           class="ac-action-text"
                           xbl:inherits="selected"/>
        </xul:description>
      </xul:hbox>
    </content>

    <implementation implements="nsIDOMXULSelectControlItemElement">
      <constructor>
        <![CDATA[
          this._typeIcon = document.getAnonymousElementByAttribute(
            this, "anonid", "type-icon"
          );
          this._siteIcon = document.getAnonymousElementByAttribute(
            this, "anonid", "site-icon"
          );
          this._titleText = document.getAnonymousElementByAttribute(
            this, "anonid", "title-text"
          );
          this._tags = document.getAnonymousElementByAttribute(
            this, "anonid", "tags"
          );
          this._tagsText = document.getAnonymousElementByAttribute(
            this, "anonid", "tags-text"
          );
          this._separator = document.getAnonymousElementByAttribute(
            this, "anonid", "separator"
          );
          this._urlText = document.getAnonymousElementByAttribute(
            this, "anonid", "url-text"
          );
          this._actionText = document.getAnonymousElementByAttribute(
            this, "anonid", "action-text"
          );
          this._adjustAcItem();
        ]]>
      </constructor>

      <property name="label" readonly="true">
        <getter>
          <![CDATA[
            // This property is a string that is read aloud by screen readers,
            // so it must not contain anything that should not be user-facing.

            let parts = [
              this.getAttribute("title"),
              this.getAttribute("displayurl"),
            ];
            let label = parts.filter(str => str).join(" ")

            // allow consumers that have extended popups to override
            // the label values for the richlistitems
            let panel = this.parentNode.parentNode;
            if (panel.createResultLabel) {
              return panel.createResultLabel(this, label);
            }

            return label;
          ]]>
        </getter>
      </property>

      <property name="_stringBundle">
        <getter><![CDATA[
          if (!this.__stringBundle) {
            this.__stringBundle = Services.strings.createBundle("chrome://global/locale/autocomplete.properties");
          }
          return this.__stringBundle;
        ]]></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>

      <field name="_inOverflow">false</field>

      <method name="_onOverflow">
        <body>
          <![CDATA[
          this._inOverflow = true;
          this._handleOverflow();
          ]]>
        </body>
      </method>

      <method name="_onUnderflow">
        <body>
          <![CDATA[
          this._inOverflow = false;
          this._handleOverflow();
          ]]>
        </body>
      </method>

      <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 (let search of Array.prototype.slice.call(aSearchTokens)) {
            let matchIndex = -1;
            let searchLen = search.length;

            // Find all matches of the search terms, but stop early for perf
            let lowerText = aText.substr(0, this.boundaryCutoff).toLowerCase();
            while ((matchIndex = lowerText.indexOf(search, matchIndex + 1)) >= 0) {
              regions.push([matchIndex, matchIndex + searchLen]);
            }
          }

          // Sort the regions by start position then end position
          regions = regions.sort((a, b) => {
            let start = a[0] - b[0];
            return (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
          if (!aDescriptionElement) {
            return;
          }
          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);

          this._appendDescriptionSpans(indices, aText, aDescriptionElement,
                                       aDescriptionElement);
          ]]>
        </body>
      </method>

      <method name="_appendDescriptionSpans">
        <parameter name="indices"/>
        <parameter name="text"/>
        <parameter name="spansParentElement"/>
        <parameter name="descriptionElement"/>
        <body>
          <![CDATA[
          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 spanText = text.substr(start, next - start);
            start = next;

            if (i % 2 == 0) {
              // Emphasize the text for even indices
              let span = spansParentElement.appendChild(
                document.createElementNS("http://www.w3.org/1999/xhtml", "span"));
              this._setUpEmphasisSpan(span, descriptionElement);
              span.textContent = spanText;
            } else {
              // Otherwise, it's plain text
              spansParentElement.appendChild(document.createTextNode(spanText));
            }
          }
          ]]>
        </body>
      </method>

      <method name="_setUpTags">
        <parameter name="tags"/>
        <body>
          <![CDATA[
          while (this._tagsText.hasChildNodes()) {
            this._tagsText.firstChild.remove();
          }

          let anyTagsMatch = false;

          // Include only tags that match the search string.
          for (let tag of tags) {
            // Check if the tag matches the search string.
            let search = this.getAttribute("text");
            let tokens = this._getSearchTokens(search);
            let indices = this._getBoundaryIndices(tag, tokens);

            if (indices.length == 2 &&
                indices[0] == 0 &&
                indices[1] == tag.length) {
              // The tag doesn't match the search string, so don't include it.
              continue;
            }

            anyTagsMatch = true;

            let tagSpan =
              document.createElementNS("http://www.w3.org/1999/xhtml", "span");
            tagSpan.classList.add("ac-tag");
            this._tagsText.appendChild(tagSpan);

            this._appendDescriptionSpans(indices, tag, tagSpan, this._tagsText);
          }

          return anyTagsMatch;
          ]]>
        </body>
      </method>

      <method name="_setUpEmphasisSpan">
        <parameter name="aSpan"/>
        <parameter name="aDescriptionElement"/>
        <body>
          <![CDATA[
          aSpan.classList.add("ac-emphasize-text");
          switch (aDescriptionElement) {
            case this._titleText:
              aSpan.classList.add("ac-emphasize-text-title");
              break;
            case this._tagsText:
              aSpan.classList.add("ac-emphasize-text-tag");
              break;
            case this._urlText:
              aSpan.classList.add("ac-emphasize-text-url");
              break;
            case this._actionText:
              aSpan.classList.add("ac-emphasize-text-action");
              break;
          }
          ]]>
        </body>
      </method>

      <!--
        This will generate an array of emphasis pairs for use with
        _setUpEmphasisedSections(). Each pair is a tuple (array) that
        represents a block of text - containing the text of that block, and a
        boolean for whether that block should have an emphasis styling applied
        to it.

        These pairs are generated by parsing a localised string (aSourceString)
        with parameters, in the format that is used by
        nsIStringBundle.formatStringFromName():

          "textA %1$S textB textC %2$S"

        Or:

          "textA %S"

        Where "%1$S", "%2$S", and "%S" are intended to be replaced by provided
        replacement strings. These are specified an array of tuples
        (aReplacements), each containing the replacement text and a boolean for
        whether that text should have an emphasis styling applied. This is used
        as a 1-based array - ie, "%1$S" is replaced by the item in the first
        index of aReplacements, "%2$S" by the second, etc. "%S" will always
        match the first index.
      -->
      <method name="_generateEmphasisPairs">
        <parameter name="aSourceString"/>
        <parameter name="aReplacements"/>
        <body>
          <![CDATA[
            let pairs = [];

            // Split on %S, %1$S, %2$S, etc. ie:
            //   "textA %S"
            //     becomes ["textA ", "%S"]
            //   "textA %1$S textB textC %2$S"
            //     becomes ["textA ", "%1$S", " textB textC ", "%2$S"]
            let parts = aSourceString.split(/(%(?:[0-9]+\$)?S)/);

            for (let part of parts) {
              // The above regex will actually give us an empty string at the
              // end - we don't want that, as we don't want to later generate an
              // empty text node for it.
              if (part.length === 0)
                continue;

              // Determine if this token is a replacement token or a normal text
              // token. If it is a replacement token, we want to extract the
              // numerical number. However, we still want to match on "$S".
              let match = part.match(/^%(?:([0-9]+)\$)?S$/);

              if (match) {
                // "%S" doesn't have a numerical number in it, but will always
                // be assumed to be 1. Furthermore, the input string specifies
                // these with a 1-based index, but we want a 0-based index.
                let index = (match[1] || 1) - 1;

                if (index >= 0 && index < aReplacements.length) {
                  pairs.push([...aReplacements[index]]);
                }
              } else {
                pairs.push([part]);
              }
            }

            return pairs;
          ]]>
        </body>
      </method>

      <!--
        _setUpEmphasisedSections() has the same use as _setUpDescription,
        except instead of taking a string and highlighting given tokens, it takes
        an array of pairs generated by _generateEmphasisPairs(). This allows
        control over emphasising based on specific blocks of text, rather than
        search for substrings.
      -->
      <method name="_setUpEmphasisedSections">
        <parameter name="aDescriptionElement"/>
        <parameter name="aTextPairs"/>
        <body>
          <![CDATA[
          // Get rid of all previous text
          while (aDescriptionElement.hasChildNodes())
            aDescriptionElement.firstChild.remove();

          for (let [text, emphasise] of aTextPairs) {
            if (emphasise) {
              let span = aDescriptionElement.appendChild(
                document.createElementNS("http://www.w3.org/1999/xhtml", "span"));
              span.textContent = text;
              switch (emphasise) {
                case "match":
                  this._setUpEmphasisSpan(span, aDescriptionElement);
                  break;
              }
            } else {
              aDescriptionElement.appendChild(document.createTextNode(text));
            }
          }
          ]]>
        </body>
      </method>

      <field name="_textToSubURI">null</field>
      <method name="_unescapeUrl">
        <parameter name="url"/>
        <body>
          <![CDATA[
          if (!this._textToSubURI) {
            this._textToSubURI =
              Components.classes["@mozilla.org/intl/texttosuburi;1"]
                        .getService(Components.interfaces.nsITextToSubURI);
          }
          return this._textToSubURI.unEscapeURIForUI("UTF-8", url);
          ]]>
        </body>
      </method>

      <method name="_adjustAcItem">
        <body>
          <![CDATA[
          let popup = this.parentNode.parentNode;
          if (!popup.popupOpen) {
            // Removing the max-width and resetting it later when overflow is
            // handled is jarring when the item is visible, so skip this when
            // the popup is open.
            this._removeMaxWidths();
          }

          let title = this.getAttribute("title");
          let titleLooksLikeUrl = false;

          let displayUrl;
          let originalUrl = this.getAttribute("url");
          let emphasiseUrl = true;

          let type = this.getAttribute("originaltype");
          let types = new Set(type.split(/\s+/));
          let initialTypes = new Set(types);
          // Remove types that should ultimately not be in the `type` string.
          types.delete("action");
          types.delete("autofill");
          types.delete("heuristic");
          type = [...types][0] || "";

          let action;

          if (initialTypes.has("autofill")) {
            // Treat autofills as visiturl actions.
            action = {
              type: "visiturl",
              params: {
                url: originalUrl,
              },
            };
          }

          this.removeAttribute("actiontype");
          this.classList.remove("overridable-action");

          // If the type includes an action, set up the item appropriately.
          if (initialTypes.has("action") || action) {
            action = action || this._parseActionUrl(originalUrl);
            this.setAttribute("actiontype", action.type);

            if (action.type == "switchtab") {
              this.classList.add("overridable-action");
              displayUrl = this._unescapeUrl(action.params.url);
              let desc = this._stringBundle.GetStringFromName("switchToTab2");
              this._setUpDescription(this._actionText, desc, true);
            } else if (action.type == "remotetab") {
              displayUrl = this._unescapeUrl(action.params.url);
              let desc = action.params.deviceName;
              this._setUpDescription(this._actionText, desc, true);
            } else if (action.type == "searchengine") {
              emphasiseUrl = false;

              // The order here is not localizable, we default to appending
              // "- Search with Engine" to the search string, to be able to
              // properly generate emphasis pairs. That said, no localization
              // changed the order while it was possible, so doesn't look like
              // there's a strong need for that.
              let {engineName, searchSuggestion, searchQuery} = action.params;

              // Override the engine name if the popup defines an override.
              let override = popup.overrideSearchEngineName;
              if (override && override != engineName) {
                engineName = override;
                action.params.engineName = override;
                let newURL =
                  PlacesUtils.mozActionURI(action.type, action.params);
                this.setAttribute("url", newURL);
              }

              let engineStr =
                this._stringBundle.formatStringFromName("searchWithEngine",
                                                        [engineName], 1);
              this._setUpDescription(this._actionText, engineStr, true);

              // Make the title by generating an array of pairs and its
              // corresponding interpolation string (e.g., "%1$S") to pass to
              // _generateEmphasisPairs.
              let pairs;
              if (searchSuggestion) {
                // Check if the search query appears in the suggestion.  It may
                // not.  If it does, then emphasize the query in the suggestion
                // and otherwise just include the suggestion without emphasis.
                let idx = searchSuggestion.indexOf(searchQuery);
                if (idx >= 0) {
                  pairs = [
                    [searchSuggestion.substring(0, idx), ""],
                    [searchQuery, "match"],
                    [searchSuggestion.substring(idx + searchQuery.length), ""],
                  ];
                } else {
                  pairs = [
                    [searchSuggestion, ""],
                  ];
                }
              } else {
                pairs = [
                  [searchQuery, ""],
                ];
              }
              let interpStr = pairs.map((pair, i) => `%${i + 1}$S`).join("");
              title = this._generateEmphasisPairs(interpStr, pairs);

              // If this is a default search match, we remove the image so we
              // can style it ourselves with a generic search icon.
              // We don't do this when matching an aliased search engine,
              // because the icon helps with recognising which engine will be
              // used (when using the default engine, we don't need that
              // recognition).
              if (!action.params.alias && !initialTypes.has("favicon")) {
                this.removeAttribute("image");
              }
            } else if (action.type == "visiturl") {
              emphasiseUrl = false;
              displayUrl = this._unescapeUrl(action.params.url);
              title = displayUrl;
              titleLooksLikeUrl = true;
              let visitStr = this._stringBundle.GetStringFromName("visit");
              this._setUpDescription(this._actionText, visitStr, true);
            } else if (action.type == "extension") {
              let content = action.params.content;
              displayUrl = content;
              this._setUpDescription(this._actionText, content, true);
            }
          }

          if (!displayUrl) {
            let input = popup.input;
            let url = typeof(input.trimValue) == "function" ?
                      input.trimValue(originalUrl) :
                      originalUrl;
            displayUrl = this._unescapeUrl(url);
          }
          // For performance reasons we may want to limit the displayUrl size.
          if (popup.textRunsMaxLen) {
            displayUrl = displayUrl.substr(0, popup.textRunsMaxLen);
          }
          this.setAttribute("displayurl", displayUrl);

          // Show the domain as the title if we don't have a title.
          if (!title) {
            title = displayUrl;
            titleLooksLikeUrl = true;
            try {
              let uri = Services.io.newURI(originalUrl, null, null);
              // Not all valid URLs have a domain.
              if (uri.host)
                title = uri.host;
            } catch (e) {}
          }

          this._tags.setAttribute("empty", "true");

          if (type == "tag" || type == "bookmark-tag") {
            // 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(/\s*,\s*/).sort((a, b) => {
              return a.localeCompare(a);
            });

            let anyTagsMatch = this._setUpTags(sortedTags);
            if (anyTagsMatch) {
              this._tags.removeAttribute("empty");
            }
            if (type == "bookmark-tag") {
              type = "bookmark";
            }
          } else if (type == "keyword") {
            // Note that this is a moz-action with action.type == keyword.
            emphasiseUrl = false;
            let keywordArg = this.getAttribute("text").replace(/^[^\s]+\s*/, "");
            if (!keywordArg) {
              // Treat keyword searches without arguments as visiturl actions.
              type = "visiturl";
              this.setAttribute("actiontype", "visiturl");
              let visitStr = this._stringBundle.GetStringFromName("visit");
              this._setUpDescription(this._actionText, visitStr, true);
            } else {
              let pairs = [[title, ""], [keywordArg, "match"]];
              let interpStr =
                this._stringBundle.GetStringFromName("bookmarkKeywordSearch");
              title = this._generateEmphasisPairs(interpStr, pairs);
              // The action box will be visible since this is a moz-action, but
              // we want it to appear as if it were not visible, so set its text
              // to the empty string.
              this._setUpDescription(this._actionText, "", false);
            }
          }

          this.setAttribute("type", type);

          if (titleLooksLikeUrl) {
            this._titleText.setAttribute("lookslikeurl", "true");
          } else {
            this._titleText.removeAttribute("lookslikeurl");
          }

          if (Array.isArray(title)) {
            // For performance reasons we may want to limit the title size.
            if (popup.textRunsMaxLen) {
              title = title.map(t => t.substr(0, popup.textRunsMaxLen));
            }
            this._setUpEmphasisedSections(this._titleText, title);
          } else {
            // For performance reasons we may want to limit the title size.
            if (popup.textRunsMaxLen) {
              title = title.substr(0, popup.textRunsMaxLen);
            }
            this._setUpDescription(this._titleText, title, false);
          }
          this._setUpDescription(this._urlText, displayUrl, !emphasiseUrl);

          if (this._inOverflow) {
            this._handleOverflow();
          }
          ]]>
        </body>
      </method>

      <method name="_removeMaxWidths">
        <body>
          <![CDATA[
          this._titleText.style.removeProperty("max-width");
          this._tagsText.style.removeProperty("max-width");
          this._urlText.style.removeProperty("max-width");
          this._actionText.style.removeProperty("max-width");
          ]]>
        </body>
      </method>

      <!-- Sets the x-coordinate of the leading edge of the site icon (favicon)
           relative the the leading edge of the window.
           @param newStart The new x-coordinate, relative to the leading edge of
                  the window.  Pass undefined to reset the icon's position to
                  whatever is specified in CSS.
           @return True if the icon's position changed, false if not. -->
      <method name="adjustSiteIconStart">
        <parameter name="newStart"/>
        <body>
          <![CDATA[
          if (typeof(newStart) != "number") {
            this._typeIcon.style.removeProperty("margin-inline-start");
            return true;
          }
          let rect = this._siteIcon.getBoundingClientRect();
          let dir = this.getAttribute("dir");
          let delta = dir == "rtl" ? rect.right - newStart
                                   : newStart - rect.left;
          let px = this._typeIcon.style.marginInlineStart;
          if (!px) {
            // Allow margin-inline-start not to be specified in CSS initially.
            let style = window.getComputedStyle(this._typeIcon);
            px = dir == "rtl" ? style.marginRight : style.marginLeft;
          }
          let typeIconStart = Number(px.substr(0, px.length - 2));
          this._typeIcon.style.marginInlineStart = (typeIconStart + delta) + "px";
          return delta > 0;
          ]]>
        </body>
      </method>

      <!-- This method truncates the displayed strings as necessary. -->
      <method name="_handleOverflow">
        <body><![CDATA[
          let itemRect = this.parentNode.getBoundingClientRect();
          let titleRect = this._titleText.getBoundingClientRect();
          let tagsRect = this._tagsText.getBoundingClientRect();
          let separatorRect = this._separator.getBoundingClientRect();
          let urlRect = this._urlText.getBoundingClientRect();
          let actionRect = this._actionText.getBoundingClientRect();
          let separatorURLActionWidth =
            separatorRect.width + Math.max(urlRect.width, actionRect.width);

          // Total width for the title and URL/action is the width of the item
          // minus the start of the title text minus a little optional extra padding.
          // This extra padding amount is basically arbitrary but keeps the text
          // from getting too close to the popup's edge.
          let dir = this.getAttribute("dir");
          let titleStart = dir == "rtl" ? itemRect.right - titleRect.right
                                        : titleRect.left - itemRect.left;

          let popup = this.parentNode.parentNode;
          let itemWidth = itemRect.width - titleStart - popup.overflowPadding;

          if (this._tags.hasAttribute("empty")) {
            // The tags box is not displayed in this case.
            tagsRect.width = 0;
          }

          let titleTagsWidth = titleRect.width + tagsRect.width;
          if (titleTagsWidth + separatorURLActionWidth > itemWidth) {
            // Title + tags + URL/action overflows the item width.

            // The percentage of the item width allocated to the title and tags.
            let titleTagsPct = 0.66;

            let titleTagsAvailable = itemWidth - separatorURLActionWidth;
            let titleTagsMaxWidth = Math.max(
              titleTagsAvailable,
              itemWidth * titleTagsPct
            );
            if (titleTagsWidth > titleTagsMaxWidth) {
              // Title + tags overflows the max title + tags width.

              // The percentage of the title + tags width allocated to the
              // title.
              let titlePct = 0.33;

              let titleAvailable = titleTagsMaxWidth - tagsRect.width;
              let titleMaxWidth = Math.max(
                titleAvailable,
                titleTagsMaxWidth * titlePct
              );
              let tagsAvailable = titleTagsMaxWidth - titleRect.width;
              let tagsMaxWidth = Math.max(
                tagsAvailable,
                titleTagsMaxWidth * (1 - titlePct)
              );
              this._titleText.style.maxWidth = titleMaxWidth + "px";
              this._tagsText.style.maxWidth = tagsMaxWidth + "px";
            }
            let urlActionMaxWidth = Math.max(
              itemWidth - titleTagsWidth,
              itemWidth * (1 - titleTagsPct)
            );
            urlActionMaxWidth -= separatorRect.width;
            this._urlText.style.maxWidth = urlActionMaxWidth + "px";
            this._actionText.style.maxWidth = urlActionMaxWidth + "px";
          }
        ]]></body>
      </method>

      <method name="handleOverUnderflow">
        <body>
          <![CDATA[
          this._removeMaxWidths();
          this._handleOverflow();
          ]]>
        </body>
      </method>

      <method name="_parseActionUrl">
        <parameter name="aUrl"/>
        <body><![CDATA[
          if (!aUrl.startsWith("moz-action:"))
            return null;

          // URL is in the format moz-action:ACTION,PARAMS
          // Where PARAMS is a JSON encoded object.
          let [, type, params] = aUrl.match(/^moz-action:([^,]+),(.*)$/);

          let action = {
            type: type,
          };

          try {
            action.params = JSON.parse(params);
            for (let key in action.params) {
              action.params[key] = decodeURIComponent(action.params[key]);
            }
          } catch (e) {
            // If this failed, we assume that params is not a JSON object, and
            // is instead just a flat string. This may happen for legacy
            // search components.
            action.params = {
              url: params,
            }
          }

          return action;
        ]]></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>
      <field name="mouseSelectedIndex">-1</field>
    </implementation>
    <handlers>
      <handler event="mouseup">
        <![CDATA[
        // don't call onPopupClick for the scrollbar buttons, thumb, slider, etc.
        let 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) {
         let item = event.target;
         while (item && item.localName != "richlistitem") {
           item = item.parentNode;
         }

         if (!item)
           return;

         let index = this.getIndexOfItem(item);
         if (index != this.selectedIndex) {
            this.mouseSelectedIndex = this.selectedIndex = index;
         }

         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">
    <handlers>
      <handler event="mousedown" button="0"><![CDATA[
        document.getBindingParent(this).toggleHistoryPopup();
      ]]></handler>
    </handlers>
  </binding>

</bindings>