gecko/toolkit/content/widgets/autocomplete.xml

<?xml version="1.0"?>

# -*- Mode: HTML -*-
# ***** BEGIN LICENSE BLOCK *****
# Version: MPL 1.1/GPL 2.0/LGPL 2.1
#
# The contents of this file are subject to the Mozilla Public License Version
# 1.1 (the "License"); you may not use this file except in compliance with
# the License. You may obtain a copy of the License at
# http://www.mozilla.org/MPL/
#
# Software distributed under the License is distributed on an "AS IS" basis,
# WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
# for the specific language governing rights and limitations under the
# License.
#
# The Original Code is mozilla.org browser.
#
# The Initial Developer of the Original Code is
# Joe Hewitt.
# Portions created by the Initial Developer are Copyright (C) 2003
# the Initial Developer. All Rights Reserved.
#
# Contributor(s):
#   Pierre Chanial (p_ch@verizon.net)
#   Dean Tessman   (dean_tessman@hotmail.com)
#   Masayuki Nakano (masayuki@d-toybox.com)
#   Pamela Greene (pamg.bugs@gmail.com)
#   Edward Lee (edward.lee@engineering.uiuc.edu)
#
# Alternatively, the contents of this file may be used under the terms of
# either the GNU General Public License Version 2 or later (the "GPL"), or
# the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
# in which case the provisions of the GPL or the LGPL are applicable instead
# of those above. If you wish to allow use of your version of this file only
# under the terms of either the GPL or the LGPL, and not to allow others to
# use your version of this file under the terms of the MPL, indicate your
# decision by deleting the provisions above and replace them with the notice
# and other provisions required by the GPL or the LGPL. If you do not delete
# the provisions above, a recipient may use your version of this file under
# the terms of any one of the MPL, the GPL or the LGPL.
#
# ***** END LICENSE BLOCK *****

<!DOCTYPE bindings [
<!ENTITY % actionsDTD SYSTEM "chrome://global/locale/actions.dtd">
%actionsDTD;
]>

<bindings id="autocompleteBindings"
          xmlns="http://www.mozilla.org/xbl"
          xmlns:html="http://www.w3.org/1999/xhtml"
          xmlns:xul="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
          xmlns:xbl="http://www.mozilla.org/xbl">

  <binding id="autocomplete"
           extends="chrome://global/content/bindings/textbox.xml#textbox">
    <resources>
      <stylesheet src="chrome://global/skin/autocomplete.css"/>
    </resources>

    <content sizetopopup="pref">
      <xul:hbox class="autocomplete-textbox-container" flex="1" xbl:inherits="focused">
        <children includes="image|deck|stack|box">
          <xul:image class="autocomplete-icon" allowevents="true"/>
        </children>

        <xul:hbox anonid="textbox-input-box" class="textbox-input-box" flex="1" xbl:inherits="tooltiptext=inputtooltiptext">
          <children/>
          <html:input anonid="input" class="autocomplete-textbox textbox-input"
                      flex="1" allowevents="true"
                      xbl:inherits="tooltiptext=inputtooltiptext,onfocus,onblur,value,type,maxlength,disabled,size,readonly,placeholder,tabindex,accesskey"/>
        </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"/>
    </content>

    <implementation implements="nsIAccessibleProvider, nsIAutoCompleteInput, nsIDOMXULMenuListElement">
      <field name="mController">null</field>
      <field name="mSearchNames">null</field>
      <field name="mIgnoreInput">false</field>
      <field name="mEnterEvent">null</field>
      <field name="mConsumeRollupEvent">false</field>

      <constructor><![CDATA[
        mController = Components.classes["@mozilla.org/autocomplete/controller;1"].
                        getService(Components.interfaces.nsIAutoCompleteController);
      ]]></constructor>

      <!-- =================== nsIAccessibleProvider =================== -->

      <property name="accessibleType" readonly="true">
        <getter>
          <![CDATA[
            // Will be exposed as nsIAccessible::ROLE_AUTOCOMPLETE
            return Components.interfaces.nsIAccessibleProvider.XULCombobox;
          ]]>
        </getter>
      </property>

      <!-- =================== nsIAutoCompleteInput =================== -->

      <field name="popup"><![CDATA[
        var popup = null;
        var popupId = this.getAttribute("autocompletepopup");
        if (popupId)
          popup = document.getElementById(popupId);
        if (!popup) {
          popup = document.createElement("panel");
          popup.setAttribute("type", "autocomplete");
          popup.setAttribute("noautofocus", "true");

          var popupset = document.getAnonymousElementByAttribute(this, "anonid", "popupset");
          popupset.appendChild(popup);
        }
        popup.mInput = this;
        popup;
      ]]></field>

      <property name="controller" onget="return this.mController;" readonly="true"/>

      <property name="popupOpen"
                onget="return this.popup.popupOpen;"
                onset="if (val) this.openPopup(); else this.closePopup();"/>

      <property name="disableAutoComplete"
                onset="this.setAttribute('disableautocomplete', val); return val;"
                onget="return this.getAttribute('disableautocomplete') == 'true';"/>

      <property name="completeDefaultIndex"
                onset="this.setAttribute('completedefaultindex', val); return val;"
                onget="return this.getAttribute('completedefaultindex') == 'true';"/>

      <property name="completeSelectedIndex"
                onset="this.setAttribute('completeselectedindex', val); return val;"
                onget="return this.getAttribute('completeselectedindex') == 'true';"/>

      <property name="forceComplete"
                onset="this.setAttribute('forcecomplete', val); return val;"
                onget="return this.getAttribute('forcecomplete') == 'true';"/>

      <property name="minResultsForPopup"
                onset="this.setAttribute('minresultsforpopup', val); return val;"
                onget="var m = parseInt(this.getAttribute('minresultsforpopup')); return isNaN(m) ? 1 : m;"/>

      <property name="showCommentColumn"
                onset="this.setAttribute('showcommentcolumn', val); return val;"
                onget="return this.getAttribute('showcommentcolumn') == 'true';"/>

      <property name="showImageColumn"
                onset="this.setAttribute('showimagecolumn', val); return val;"
                onget="return this.getAttribute('showimagecolumn') == 'true';"/>

      <property name="timeout"
                onset="this.setAttribute('timeout', val); return val;"
                onget="return parseInt(this.getAttribute('timeout')) || 50;"/>

      <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;"/>

      <property name="consumeRollupEvent" readonly="true"
                onget="return this.mConsumeRollupEvent;"/>

      <!-- This is the maximum number of drop-down rows we get when we
            hit the drop marker beside fields that have it (like the URLbar).-->
      <field name="maxDropMarkerRows" readonly="true">14</field>

      <method name="getSearchAt">
        <parameter name="aIndex"/>
        <body><![CDATA[
          this.initSearchNames();
          return this.mSearchNames[aIndex];
        ]]></body>
      </method>

      <property name="textValue"
                onget="return this.value;">
        <setter><![CDATA[
          // Completing a result should simulate the user typing the result,
          // so fire an input event.
          this.value = val;
          var evt = document.createEvent("UIEvents");
          evt.initUIEvent("input", true, false, window, 0);
          this.mIgnoreInput = true;
          this.dispatchEvent(evt);
          this.mIgnoreInput = false;
          return this.value;
        ]]></setter>
      </property>

      <method name="selectTextRange">
        <parameter name="aStartIndex"/>
        <parameter name="aEndIndex"/>
        <body><![CDATA[
          this.inputField.setSelectionRange(aStartIndex, aEndIndex);
        ]]></body>
      </method>

      <method name="onSearchBegin">
        <body><![CDATA[
          this.fireEvent("searchbegin");
        ]]></body>
      </method>

      <method name="onSearchComplete">
        <body><![CDATA[
          if (this.mController.matchCount == 0)
            this.setAttribute("nomatch", "true");
          else
            this.removeAttribute("nomatch");

          this.fireEvent("searchcomplete");
        ]]></body>
      </method>

      <method name="onTextEntered">
        <body><![CDATA[
          var rv = this.fireEvent("textentered", this.mEnterEvent);
          this.mEnterEvent = null;
          return rv;
        ]]></body>
      </method>

      <method name="onTextReverted">
        <body><![CDATA[
          return this.fireEvent("textreverted");
        ]]></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 =================== -->

      <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);

          this.inputField.value = val;
          this.mIgnoreInput = false;
          var event = document.createEvent('Events');
          event.initEvent('ValueChange', true, true);
          this.inputField.dispatchEvent(event);
          return val;
        ]]></setter>
      </property>

      <property name="focused" readonly="true"
                onget="return this.getAttribute('focused') == 'true';"/>

      <!-- maximum number of rows to display at a time -->
      <property name="maxRows"
                onset="this.setAttribute('maxrows', val); return val;"
                onget="return parseInt(this.getAttribute('maxrows')) || 0;"/>

      <!-- option to allow scrolling through the list via the tab key, rather than
           tab moving focus out of the textbox -->
      <property name="tabScrolling"
                onset="return this.setAttribute('tabscrolling', val); return val;"
                onget="return this.getAttribute('tabscrolling') == 'true';"/>

      <!-- disable key navigation handling in the popup results -->
      <property name="disableKeyNavigation"
                onset="this.setAttribute('disablekeynavigation', val); return val;"
                onget="return this.getAttribute('disablekeynavigation') == 'true';"/>

      <!-- option to completely ignore any blur events while
           searches are still going on.  This is useful so that nothing
           gets autopicked if the window is required to lose focus for
           some reason (eg in LDAP autocomplete, another window may be
           brought up so that the user can enter a password to authenticate
           to an LDAP server).  -->
      <property name="ignoreBlurWhileSearching"
                onset="this.setAttribute('ignoreblurwhilesearching', val); return val;"
                onget="return this.getAttribute('ignoreblurwhilesearching') == 'true';"/>

      <!-- option to highlight entries that don't have any matches -->
      <property name="highlightNonMatches"
                onset="this.setAttribute('highlightnonmatches', val); return val;"
                onget="return this.getAttribute('highlightnonmatches') == 'true';"/>

      <!-- =================== PRIVATE MEMBERS =================== -->

      <!-- ::::::::::::: autocomplete controller ::::::::::::: -->

      <method name="attachController">
        <body><![CDATA[
          this.mController.input = this;
        ]]></body>
      </method>

      <method name="detachController">
        <body><![CDATA[
          try {
            if  (this.mController.input == this)
            this.mController.input = null;
          } catch (ex) {
            // nothing really to do.
          }
        ]]></body>
      </method>

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

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

      <method name="closePopup">
        <body><![CDATA[
          this.mConsumeRollupEvent = false;
          this.popup.closePopup();
        ]]></body>
      </method>

      <method name="showHistoryPopup">
        <body><![CDATA[
          // history dropmarker pushed state
          function cleanup(popup) {
            popup.removeEventListener("popupshowing", onShow, false);
          }
          function onShow(event) {
            var popup = event.target, input = popup.input;
            cleanup(popup);
            input.setAttribute("open", "true");
            function onHide() {
              input.removeAttribute("open");
              input.mConsumeRollupEvent = false;
              popup.removeEventListener("popuphiding", onHide, false);
            }
            popup.addEventListener("popuphiding", onHide, false);
          }
          this.popup.addEventListener("popupshowing", onShow, false);
          setTimeout(cleanup, 1000, this.popup);

          // Store our "normal" maxRows on the popup, so that it can reset the
          // value when the popup is hidden.
          this.popup._normalMaxRows = this.maxRows;

          // Increase our maxRows temporarily, since we want the dropdown to
          // be bigger in this case. The popup's popupshowing/popuphiding
          // handlers will take care of resetting this.
          this.maxRows = this.maxDropMarkerRows;

          // Ensure that we have focus.
          if (!this.focused)
            this.focus();
          this.mConsumeRollupEvent = true;
          this.attachController();
          this.mController.startSearch("");
        ]]></body>
      </method>

      <method name="toggleHistoryPopup">
        <body><![CDATA[
          if (!this.popup.mPopupOpen)
            this.showHistoryPopup();
          else
            this.closePopup();
        ]]></body>
      </method>

      <!-- ::::::::::::: event dispatching ::::::::::::: -->

      <method name="fireEvent">
        <parameter name="aEventType"/>
        <body><![CDATA[
          var cancel = false;
          // handle any xml attribute event handlers
          var handler = this.getAttribute("on"+aEventType);
          if (handler) {
            var fn = new Function("eventType", "param", handler);
            cancel = fn.apply(this, arguments);
          }

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

      <!-- ::::::::::::: key handling ::::::::::::: -->

      <method name="onKeyPress">
        <parameter name="aEvent"/>
        <body><![CDATA[
          if (aEvent.target.localName != "textbox")
            return;  // Let child buttons of autocomplete take input

          //XXXpch this is so bogus...
          if (aEvent.getPreventDefault())
            return false;

          var cancel = false;

          // Catch any keys that could potentially move the caret. Ctrl can be
          // used in combination with these keys on Windows and Linux; and Alt
          // can be used on OS X, so make sure the unused one isn't used.
          if (!this.disableKeyNavigation &&
#ifdef XP_MACOSX
              !aEvent.ctrlKey) {
#else
              !aEvent.altKey) {
#endif
            switch (aEvent.keyCode) {
              case KeyEvent.DOM_VK_LEFT:
              case KeyEvent.DOM_VK_RIGHT:
              case KeyEvent.DOM_VK_HOME:
                cancel = this.mController.handleKeyNavigation(aEvent.keyCode);
                break;
            }
          }

          // Handle keys that are not part of a keyboard shortcut (no Ctrl or Alt)
          if (!this.disableKeyNavigation && !aEvent.ctrlKey && !aEvent.altKey) {
            switch (aEvent.keyCode) {
              case KeyEvent.DOM_VK_TAB:
                if (this.tabScrolling && this.popup.mPopupOpen)
                  cancel = this.mController.handleKeyNavigation(aEvent.shiftKey ?
                                                                KeyEvent.DOM_VK_UP :
                                                                KeyEvent.DOM_VK_DOWN);
                break;
              case KeyEvent.DOM_VK_UP:
              case KeyEvent.DOM_VK_DOWN:
              case KeyEvent.DOM_VK_PAGE_UP:
              case KeyEvent.DOM_VK_PAGE_DOWN:
                cancel = this.mController.handleKeyNavigation(aEvent.keyCode);
                break;
            }
          }

          // Handle keys we know aren't part of a shortcut, even with Alt or
          // Ctrl.
          switch (aEvent.keyCode) {
            case KeyEvent.DOM_VK_ESCAPE:
              cancel = this.mController.handleEscape();
              break;
            case KeyEvent.DOM_VK_RETURN:
#ifdef XP_MACOSX
              // Prevent the default action, since it will beep on Mac
              if (aEvent.metaKey)
                aEvent.preventDefault();
#endif
              this.mEnterEvent = aEvent;
              cancel = this.mController.handleEnter(false);
              break;
            case KeyEvent.DOM_VK_DELETE:
#ifdef XP_MACOSX
            case KeyEvent.DOM_VK_BACK_SPACE:
              if (aEvent.shiftKey)
#endif
              cancel = this.mController.handleDelete();
              break;
            case KeyEvent.DOM_VK_DOWN:
            case KeyEvent.DOM_VK_UP:
              if (aEvent.altKey)
                this.toggleHistoryPopup();
              break;
#ifndef XP_MACOSX
            case KeyEvent.DOM_VK_F4:
              this.toggleHistoryPopup();
              break;
#endif
          }

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

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

      <!-- ::::::::::::: miscellaneous ::::::::::::: -->

      <method name="initSearchNames">
        <body><![CDATA[
          if (!this.mSearchNames) {
            var names = this.getAttribute("autocompletesearch");
            if (!names)
              this.mSearchNames = [];
            else
              this.mSearchNames = names.split(" ");
          }
        ]]></body>
      </method>

      <method name="_focus">
        <!-- doesn't reset this.mController -->
        <body><![CDATA[
          this._dontBlur = true;
          this.focus();
          this._dontBlur = false;
        ]]></body>
      </method>

      <method name="resetActionType">
        <body><![CDATA[
          if (this.mIgnoreInput)
            return;
          this.removeAttribute("actiontype");
        ]]></body>
      </method>

    </implementation>

    <handlers>
      <handler event="input"><![CDATA[
        if (!this.mIgnoreInput && this.mController.input == this) {
          this.mController.handleText(true);
        }
        this.resetActionType();
      ]]></handler>

      <handler event="keypress" phase="capturing"
               action="return this.onKeyPress(event);"/>

      <handler event="compositionstart" phase="capturing"
               action="if (this.mController.input == this) this.mController.handleStartComposition();"/>

      <handler event="compositionend" phase="capturing"
               action="if (this.mController.input == this) this.mController.handleEndComposition();"/>

      <handler event="focus" phase="capturing"
               action="this.attachController();"/>

      <handler event="blur" phase="capturing"
               action="if (!this._dontBlur) this.detachController();"/>
    </handlers>
  </binding>

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

    <content ignorekeys="true" level="top">
      <xul:tree anonid="tree" class="autocomplete-tree plain" hidecolumnpicker="true" flex="1" seltype="single">
        <xul:treecols anonid="treecols">
          <xul:treecol id="treecolAutoCompleteValue" class="autocomplete-treecol" flex="1" overflow="true"/>
        </xul:treecols>
        <xul:treechildren class="autocomplete-treebody"/>
      </xul:tree>
    </content>

    <implementation>
      <field name="mShowCommentColumn">false</field>
      <field name="mShowImageColumn">false</field>

      <property name="showCommentColumn"
                   onget="return this.mShowCommentColumn;">
        <setter>
          <![CDATA[
          if (!val && this.mShowCommentColumn) {
            // reset the flex on the value column and remove the comment column
            document.getElementById("treecolAutoCompleteValue").setAttribute("flex", 1);
            this.removeColumn("treecolAutoCompleteComment");
          } else if (val && !this.mShowCommentColumn) {
            // reset the flex on the value column and add the comment column
            document.getElementById("treecolAutoCompleteValue").setAttribute("flex", 2);
            this.addColumn({id: "treecolAutoCompleteComment", flex: 1});
          }
          this.mShowCommentColumn = val;
          return val;
        ]]>
        </setter>
      </property>

      <property name="showImageColumn"
                onget="return this.mShowImageColumn;">
        <setter>
          <![CDATA[
          if (!val && this.mShowImageColumn) {
            // remove the image column
            this.removeColumn("treecolAutoCompleteImage");
          } else if (val && !this.mShowImageColumn) {
            // add the image column
            this.addColumn({id: "treecolAutoCompleteImage", flex: 1});
          }
          this.mShowImageColumn = val;
          return val;
        ]]>
        </setter>
      </property>


      <method name="addColumn">
        <parameter name="aAttrs"/>
        <body>
          <![CDATA[
          var col = document.createElement("treecol");
          col.setAttribute("class", "autocomplete-treecol");
          for (var name in aAttrs)
            col.setAttribute(name, aAttrs[name]);
          this.treecols.appendChild(col);
          return col;
        ]]>
        </body>
      </method>

      <method name="removeColumn">
        <parameter name="aColId"/>
        <body>
          <![CDATA[
          return this.treecols.removeChild(document.getElementById(aColId));
        ]]>
        </body>
      </method>

      <property name="selectedIndex"
                onget="return this.tree.currentIndex;">
        <setter>
          <![CDATA[
          this.tree.view.selection.select(val);
          if (this.tree.treeBoxObject.height > 0)
            this.tree.treeBoxObject.ensureRowIsVisible(val < 0 ? 0 : val);
          // Fire select event on xul:tree so that accessibility API
          // support layer can fire appropriate accessibility events.
          var event = document.createEvent('Events');
          event.initEvent("select", true, true);
          this.tree.dispatchEvent(event);
          return val;
        ]]></setter>
      </property>

      <method name="adjustHeight">
        <body>
          <![CDATA[
          // detect the desired height of the tree
          var bx = this.tree.treeBoxObject;
          var view = this.tree.view;
          if (!view)
            return;
          var rows = this.maxRows;
          if (!view.rowCount || (rows && view.rowCount < rows))
            rows = view.rowCount;

          var height = rows * bx.rowHeight;

          if (height == 0)
            this.tree.setAttribute("collapsed", "true");
          else {
            if (this.tree.hasAttribute("collapsed"))
              this.tree.removeAttribute("collapsed");

            this.tree.setAttribute("height", height);
          }
          this.tree.setAttribute("hidescrollbar", view.rowCount <= rows);
        ]]>
        </body>
      </method>

      <method name="openAutocompletePopup">
        <parameter name="aInput"/>
        <parameter name="aElement"/>
        <body><![CDATA[
          // until we have "baseBinding", (see bug #373652) this allows
          // us to override openAutocompletePopup(), but still call
          // the method on the base class
          this._openAutocompletePopup(aInput, aElement);
        ]]></body>
      </method>

      <method name="_openAutocompletePopup">
        <parameter name="aInput"/>
        <parameter name="aElement"/>
        <body><![CDATA[
          if (!this.mPopupOpen) {
            this.mInput = aInput;
            this.view = aInput.controller.QueryInterface(Components.interfaces.nsITreeView);
            this.invalidate();

            this.showCommentColumn = this.mInput.showCommentColumn;
            this.showImageColumn = this.mInput.showImageColumn;

            document.popupNode = null;

            var rect = aElement.getBoundingClientRect();
            var nav = aElement.ownerDocument.defaultView.QueryInterface(Components.interfaces.nsIInterfaceRequestor)
                              .getInterface(Components.interfaces.nsIWebNavigation);
            var docShell = nav.QueryInterface(Components.interfaces.nsIDocShell);
            var docViewer = docShell.contentViewer.QueryInterface(Components.interfaces.nsIMarkupDocumentViewer);
            var width = (rect.right - rect.left) * docViewer.fullZoom;
            this.setAttribute("width", width > 100 ? width : 100);

            // setConsumeRollupEvent() before we call openPopup()
            var nsIPopupBO = Components.interfaces.nsIPopupBoxObject;
            this.popupBoxObject.setConsumeRollupEvent(
              this.mInput.consumeRollupEvent ?
                nsIPopupBO.ROLLUP_CONSUME :
                nsIPopupBO.ROLLUP_NO_CONSUME);
            this.openPopup(aElement, "after_start", 0, 0, false, false);
          }
        ]]></body>
      </method>

      <method name="invalidate">
        <body><![CDATA[
          this.adjustHeight();
          this.tree.treeBoxObject.invalidate();
        ]]></body>
      </method>

      <method name="selectBy">
        <parameter name="aReverse"/>
        <parameter name="aPage"/>
        <body><![CDATA[
          try {
            var amount = aPage ? 5 : 1;
            this.selectedIndex = this.getNextIndex(aReverse, amount, this.selectedIndex, this.tree.view.rowCount-1);
            if (this.selectedIndex == -1) {
              this.input._focus();
            }
          } catch (ex) {
            // do nothing - occasionally timer-related js errors happen here
            // e.g. "this.selectedIndex has no properties", when you type fast and hit a
            // navigation key before this popup has opened
          }
        ]]></body>
      </method>

      <!-- =================== PUBLIC MEMBERS =================== -->

      <field name="tree">
        document.getAnonymousElementByAttribute(this, "anonid", "tree");
      </field>

      <field name="treecols">
        document.getAnonymousElementByAttribute(this, "anonid", "treecols");
      </field>

      <property name="view"
                onget="return this.mView;">
        <setter><![CDATA[
          // We must do this by hand because the tree binding may not be ready yet
          this.mView = val;
          var bx = this.tree.boxObject;
          bx = bx.QueryInterface(Components.interfaces.nsITreeBoxObject);
          bx.view = val;
        ]]></setter>
      </property>

    </implementation>
  </binding>

  <binding id="autocomplete-base-popup" extends="chrome://global/content/bindings/popup.xml#popup">
    <implementation implements="nsIAutoCompletePopup">
      <!-- nsIAccessible from #popup -->
      <property name="accessibleType" readonly="true"
                onget="return Components.interfaces.nsIAccessibleProvider.NoAccessible;"/>

      <field name="mInput">null</field>
      <field name="mPopupOpen">false</field>

      <!-- =================== nsIAutoCompletePopup =================== -->

      <property name="input" readonly="true"
                onget="return this.mInput"/>

      <property name="overrideValue" readonly="true"
                onget="return null;"/>

      <property name="popupOpen" readonly="true"
                onget="return this.mPopupOpen;"/>

      <method name="closePopup">
        <body>
          <![CDATA[
          if (this.mPopupOpen) {
            this.hidePopup();
            document.popupNode = null;
            this.removeAttribute("width");
          }
        ]]>
        </body>
      </method>

      <!-- This is the default number of rows that we give the autocomplete
           popup when the textbox doesn't have a "maxrows" attribute
           for us to use. -->
      <field name="defaultMaxRows" readonly="true">6</field>

      <!-- In some cases (e.g. when the input's dropmarker button is clicked),
           the input wants to display a popup with more rows. In that case, it
           should increase its maxRows property and store the "normal" maxRows
           in this field. When the popup is hidden, we restore the input's
           maxRows to the value stored in this field.

           This field is set to -1 between uses so that we can tell when it's
           been set by the input and when we need to set it in the popupshowing
           handler. -->
      <field name="_normalMaxRows">-1</field>

      <property name="maxRows" readonly="true">
        <getter>
          <![CDATA[
          return (this.mInput && this.mInput.maxRows) || this.defaultMaxRows;
        ]]>
        </getter>
      </property>

      <method name="getNextIndex">
        <parameter name="aReverse"/>
        <parameter name="aAmount"/>
        <parameter name="aIndex"/>
        <parameter name="aMaxRow"/>
        <body><![CDATA[
          if (aMaxRow < 0)
            return -1;

          var newIdx = aIndex + (aReverse?-1:1)*aAmount;
          if (aReverse && aIndex == -1 || newIdx > aMaxRow && aIndex != aMaxRow)
            newIdx = aMaxRow;
          else if (!aReverse && aIndex == -1 || newIdx < 0 && aIndex != 0)
            newIdx = 0;

          if (newIdx < 0 && aIndex == 0 || newIdx > aMaxRow && aIndex == aMaxRow)
            aIndex = -1;
          else
            aIndex = newIdx;

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

      <method name="onPopupClick">
        <parameter name="aEvent"/>
        <body><![CDATA[
          var controller = this.view.QueryInterface(Components.interfaces.nsIAutoCompleteController);
          controller.handleEnter(true);
        ]]></body>
      </method>
    </implementation>

    <handlers>
      <handler event="popupshowing"><![CDATA[
        // If normalMaxRows wasn't already set by the input, then set it here
        // so that we restore the correct number when the popup is hidden.
        if (this._normalMaxRows < 0)
          this._normalMaxRows = this.mInput.maxRows;

        this.mPopupOpen = true;
      ]]></handler>

      <handler event="popuphiding"><![CDATA[
        var isListActive = true;
        if (this.selectedIndex == -1)
          isListActive = false;
        var controller = this.view.QueryInterface(Components.interfaces.nsIAutoCompleteController);
        controller.stopSearch();

        this.mPopupOpen = false;

        // Reset the maxRows property to the cached "normal" value, and reset
        // _normalMaxRows so that we can detect whether it was set by the input
        // when the popupshowing handler runs.
        this.mInput.maxRows = this._normalMaxRows;
        this._normalMaxRows = -1;
        // If the list was being navigated and then closed, make sure
        // we fire accessible focus event back to textbox
        if (isListActive) {
          this.mInput.mIgnoreFocus = true;
          this.mInput._focus();
          this.mInput.mIgnoreFocus = false;
        }
      ]]></handler>
    </handlers>
  </binding>

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

    <content ignorekeys="true" level="top">
      <xul:richlistbox anonid="richlistbox" class="autocomplete-richlistbox" flex="1"/>
      <xul:hbox>
        <children/>
      </xul:hbox>
    </content>

    <implementation implements="nsIAutoCompletePopup">
      <field name="_currentIndex">0</field>

      <!-- =================== nsIAutoCompletePopup =================== -->

      <property name="selectedIndex"
                onget="return this.richlistbox.selectedIndex;">
        <setter>
          <![CDATA[
          this.richlistbox.selectedIndex = val;

          // when clearing the selection (val == -1, so selectedItem will be
          // null), we want to scroll back to the top.  see bug #406194
          this.richlistbox.ensureElementIsVisible(
            this.richlistbox.selectedItem || this.richlistbox.firstChild);

          return val;
        ]]>
        </setter>
      </property>

      <method name="openAutocompletePopup">
        <parameter name="aInput"/>
        <parameter name="aElement"/>
        <body>
          <![CDATA[
          // until we have "baseBinding", (see bug #373652) this allows
          // us to override openAutocompletePopup(), but still call
          // the method on the base class
          this._openAutocompletePopup(aInput, aElement);
        ]]>
        </body>
      </method>

      <method name="_openAutocompletePopup">
        <parameter name="aInput"/>
        <parameter name="aElement"/>
        <body>
          <![CDATA[
          if (!this.mPopupOpen) {
            this.mInput = aInput;
            // clear any previous selection, see bugs 400671 and 488357
            this.selectedIndex = -1;
            document.popupNode = null;

            var width = aElement.getBoundingClientRect().width;
            this.setAttribute("width", width > 100 ? width : 100);
            // invalidate() depends on the width attribute
            this._invalidate();

            // setConsumeRollupEvent() before we call openPopup()
            var nsIPopupBO = Components.interfaces.nsIPopupBoxObject;
            this.popupBoxObject.setConsumeRollupEvent(
              this.mInput.consumeRollupEvent ?
                nsIPopupBO.ROLLUP_CONSUME :
                nsIPopupBO.ROLLUP_NO_CONSUME);
            this.openPopup(aElement, "after_start", 0, 0, false, false);
          }
        ]]>
        </body>
      </method>

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

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

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

            // Dynamically update height until richlistbox.rows works (bug 401939)
            // Adjust the height immediately and after the row contents update
            this.adjustHeight();
            setTimeout(function(self) self.adjustHeight(), 0, this);
          }

          // make sure to collapse any existing richlistitems
          // that aren't going to be used
          var existingItemsCount = this.richlistbox.childNodes.length;
          for (var i = this._matchCount; i < existingItemsCount; i++)
            this.richlistbox.childNodes[i].collapsed = true;

          this._currentIndex = 0;
          this._appendCurrentResult();
        ]]>
        </body>
      </method>

      <property name="maxResults" readonly="true">
        <getter>
          <![CDATA[
            // this is how many richlistitems will be kept around
            // (note, this getter may be overridden)
            return 20;
          ]]>
        </getter>
      </property>

      <property name="_matchCount" readonly="true">
        <getter>
          <![CDATA[
          return Math.min(this.mInput.controller.matchCount, this.maxResults);
          ]]>
        </getter>
      </property>

      <method name="adjustHeight">
        <body>
          <![CDATA[
          // Figure out how many rows to show
          let rows = this.richlistbox.childNodes;
          let numRows = Math.min(this._matchCount, this.maxRows, rows.length);

          // Default the height to 0 if we have no rows to show
          let height = 0;
          if (numRows) {
            let firstRowRect = rows[0].getBoundingClientRect();
            let lastRowRect = rows[numRows - 1].getBoundingClientRect();

            // Calculate the height to have the first row to last row shown
            height = lastRowRect.bottom - firstRowRect.top;
          }

          // Only update the height if we have a non-zero height and if it
          // changed (the richlistbox is collapsed if there are no results)
          if (height && height != this.richlistbox.height)
            this.richlistbox.height = height;
          ]]>
        </body>
      </method>

      <method name="_appendCurrentResult">
        <body>
          <![CDATA[
          var controller = this.mInput.controller;
          var matchCount = this._matchCount;
          var existingItemsCount = this.richlistbox.childNodes.length;

          // Process maxRows per chunk to improve performance and user experience
          for (let i = 0; i < this.maxRows; i++) {
            if (this._currentIndex >= matchCount)
              return;

            var item;

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

            // Unescape the URI spec for showing as an entry in the popup
            let url = Components.classes["@mozilla.org/intl/texttosuburi;1"].
              getService(Components.interfaces.nsITextToSubURI).
              unEscapeURIForUI("UTF-8", controller.getValueAt(this._currentIndex));

            if (this._currentIndex < existingItemsCount) {
              // re-use the existing item
              item = this.richlistbox.childNodes[this._currentIndex];

              // Completely re-use the existing richlistitem if it's the same
              if (item.getAttribute("text") == trimmedSearchString &&
                  item.getAttribute("url") == url) {
                item.collapsed = false;
                this._currentIndex++;
                continue;
              }
            }
            else {
              // need to create a new item
              item = document.createElementNS("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul", "richlistitem");
            }

            // set these attributes before we set the class
            // so that we can use them from the contructor
            item.setAttribute("image", controller.getImageAt(this._currentIndex));
            item.setAttribute("url", url);
            item.setAttribute("title", controller.getCommentAt(this._currentIndex));
            item.setAttribute("type", controller.getStyleAt(this._currentIndex));
            item.setAttribute("text", trimmedSearchString);

            if (this._currentIndex < existingItemsCount) {
              // re-use the existing item
              item._adjustAcItem();
              item.collapsed = false;
            }
            else {
              // set the class at the end so we can use the attributes
              // in the xbl constructor
              item.className = "autocomplete-richlistitem";
              this.richlistbox.appendChild(item);
            }

            this._currentIndex++;
          }

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

      <method name="selectBy">
        <parameter name="aReverse"/>
        <parameter name="aPage"/>
        <body>
          <![CDATA[
          try {
            var amount = aPage ? 5 : 1;

            // because we collapsed unused items, we can't use this.richlistbox.getRowCount(), we need to use the matchCount
            this.selectedIndex = this.getNextIndex(aReverse, amount, this.selectedIndex, this._matchCount - 1);
            if (this.selectedIndex == -1) {
              this.input._focus();
            }
          } catch (ex) {
            // do nothing - occasionally timer-related js errors happen here
            // e.g. "this.selectedIndex has no properties", when you type fast and hit a
            // navigation key before this popup has opened
          }
            ]]>
        </body>
      </method>

      <field name="richlistbox">
        document.getAnonymousElementByAttribute(this, "anonid", "richlistbox");
      </field>

      <property name="view"
                onget="return this.mInput.controller;"
                onset="return val;"/>

    </implementation>
  </binding>

  <binding id="autocomplete-richlistitem" extends="chrome://global/content/bindings/richlistbox.xml#richlistitem">
    <content>
      <xul:hbox align="center" class="ac-title-box">
        <xul:image xbl:inherits="src=image" class="ac-site-icon"/>
        <xul:hbox anonid="title-box" class="ac-title" flex="1"
                  onunderflow="_doUnderflow('_title');">
          <xul:description anonid="title" class="ac-normal-text ac-comment" xbl:inherits="selected"/>
        </xul:hbox>
        <xul:label anonid="title-overflow-ellipsis" xbl:inherits="selected"
                   class="ac-ellipsis-after ac-comment" hidden="true"/>
        <xul:hbox anonid="extra-box" class="ac-extra" align="center" hidden="true">
          <xul:image class="ac-result-type-tag"/>
          <xul:label class="ac-normal-text ac-comment" xbl:inherits="selected" value=":"/>
          <xul:description anonid="extra" class="ac-normal-text ac-comment" xbl:inherits="selected"/>
        </xul:hbox>
        <xul:image anonid="type-image" class="ac-type-icon"/>
      </xul:hbox>
      <xul:hbox align="center" class="ac-url-box">
        <xul:spacer class="ac-site-icon"/>
        <xul:image class="ac-action-icon"/>
        <xul:hbox anonid="url-box" class="ac-url" flex="1"
                  onunderflow="_doUnderflow('_url');">
          <xul:description anonid="url" class="ac-normal-text ac-url-text" xbl:inherits="selected"/>
        </xul:hbox>
        <xul:label anonid="url-overflow-ellipsis" xbl:inherits="selected"
                   class="ac-ellipsis-after ac-url-text" hidden="true"/>
        <xul:spacer class="ac-type-icon"/>
      </xul:hbox>
    </content>
    <implementation implements="nsIDOMXULSelectControlItemElement">
      <constructor>
        <![CDATA[
            let ellipsis = "\u2026";
            try {
              ellipsis = Components.classes["@mozilla.org/preferences-service;1"].
                getService(Components.interfaces.nsIPrefBranch).
                getComplexValue("intl.ellipsis",
                  Components.interfaces.nsIPrefLocalizedString).data;
            } catch (ex) {
              // Do nothing.. we already have a default
            }

            this._urlOverflowEllipsis = document.getAnonymousElementByAttribute(this, "anonid", "url-overflow-ellipsis");
            this._titleOverflowEllipsis = document.getAnonymousElementByAttribute(this, "anonid", "title-overflow-ellipsis");

            this._urlOverflowEllipsis.value = ellipsis;
            this._titleOverflowEllipsis.value = ellipsis;

            this._typeImage = document.getAnonymousElementByAttribute(this, "anonid", "type-image");

            this._urlBox = document.getAnonymousElementByAttribute(this, "anonid", "url-box");
            this._url = document.getAnonymousElementByAttribute(this, "anonid", "url");

            this._titleBox = document.getAnonymousElementByAttribute(this, "anonid", "title-box");
            this._title = document.getAnonymousElementByAttribute(this, "anonid", "title");

            this._extraBox = document.getAnonymousElementByAttribute(this, "anonid", "extra-box");
            this._extra = document.getAnonymousElementByAttribute(this, "anonid", "extra");

            this._adjustAcItem();
          ]]>
      </constructor>

      <property name="label" readonly="true">
        <getter>
          <![CDATA[
            var title = this.getAttribute("title");
            var url = this.getAttribute("url");
            var panel = this.parentNode.parentNode;

            // allow consumers that have extended popups to override
            // the label values for the richlistitems
            if (panel.createResultLabel)
              return panel.createResultLabel(title, url, this.getAttribute("type"));

            // aType (ex: "ac-result-type-<aType>") is related to the class of the image,
            // and is not "visible" text so don't use it for the label (for accessibility).
            return title + " " + url;
          ]]>
        </getter>
      </property>

      <field name="_boundaryCutoff">null</field>

      <property name="boundaryCutoff" readonly="true">
        <getter>
          <![CDATA[
          if (!this._boundaryCutoff) {
            this._boundaryCutoff =
              Components.classes["@mozilla.org/preferences-service;1"].
              getService(Components.interfaces.nsIPrefBranch).
              getIntPref("toolkit.autocomplete.richBoundaryCutoff");
          }
          return this._boundaryCutoff;
          ]]>
        </getter>
      </property>

      <method name="_getBoundaryIndices">
        <parameter name="aText"/>
        <parameter name="aSearchTokens"/>
        <body>
          <![CDATA[
          // Short circuit for empty search ([""] == "")
          if (aSearchTokens == "")
            return [0, aText.length];

          // Find which regions of text match the search terms
          let regions = [];
          for each (let search in aSearchTokens) {
            let matchIndex;
            let startIndex = 0;
            let searchLen = search.length;

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

          // Sort the regions by start position then end position
          regions = regions.sort(function(a, b) let (start = a[0] - b[0])
            start == 0 ? a[1] - b[1] : start);

          // Generate the boundary indices from each region
          let start = 0;
          let end = 0;
          let boundaries = [];
          let len = regions.length;
          for (let i = 0; i < len; i++) {
            // We have a new boundary if the start of the next is past the end
            let region = regions[i];
            if (region[0] > end) {
              // First index is the beginning of match
              boundaries.push(start);
              // Second index is the beginning of non-match
              boundaries.push(end);

              // Track the new region now that we've stored the previous one
              start = region[0];
            }

            // Push back the end index for the current or new region
            end = Math.max(end, region[1]);
          }

          // Add the last region
          boundaries.push(start);
          boundaries.push(end);

          // Put on the end boundary if necessary
          if (end < aText.length)
            boundaries.push(aText.length);

          // Skip the first item because it's always 0
          return boundaries.slice(1);
          ]]>
        </body>
      </method>

      <method name="_getSearchTokens">
        <parameter name="aSearch"/>
        <body>
          <![CDATA[
          let search = aSearch.toLowerCase();
          return search.split(/\s+/);
          ]]>
        </body>
      </method>

      <method name="_needsAlternateEmphasis">
        <parameter name="aText"/>
        <body>
          <![CDATA[
          for (let i = aText.length; --i >= 0; ) {
            let charCode = aText.charCodeAt(i);
            // Arabic, Syriac, Indic languages are likely to have ligatures
            // that are broken when using the main emphasis styling
            if (0x0600 <= charCode && charCode <= 0x109F)
              return true;
          }

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

      <method name="_setUpDescription">
        <parameter name="aDescriptionElement"/>
        <parameter name="aText"/>
        <parameter name="aNoEmphasis"/>
        <body>
          <![CDATA[
          // Get rid of all previous text
          while (aDescriptionElement.hasChildNodes())
            aDescriptionElement.removeChild(aDescriptionElement.firstChild);

          // If aNoEmphasis is specified, don't add any emphasis
          if (aNoEmphasis) {
            aDescriptionElement.appendChild(document.createTextNode(aText));
            return;
          }

          // Get the indices that separate match and non-match text
          let search = this.getAttribute("text");
          let tokens = this._getSearchTokens(search);
          let indices = this._getBoundaryIndices(aText, tokens);

          // If we're searching for something that needs alternate emphasis,
          // we'll need to check the text that we match
          let checkAlt = this._needsAlternateEmphasis(search);

          let next;
          let start = 0;
          let len = indices.length;
          // Even indexed boundaries are matches, so skip the 0th if it's empty
          for (let i = indices[0] == 0 ? 1 : 0; i < len; i++) {
            next = indices[i];
            let text = aText.substr(start, next - start);
            start = next;

            if (i % 2 == 0) {
              // Emphasize the text for even indices
              let span = aDescriptionElement.appendChild(
                document.createElementNS("http://www.w3.org/1999/xhtml", "span"));
              span.className = checkAlt && this._needsAlternateEmphasis(text) ?
                "ac-emphasize-alt" : "ac-emphasize-text";
              span.textContent = text;
            } else {
              // Otherwise, it's plain text
              aDescriptionElement.appendChild(document.createTextNode(text));
            }
          }
          ]]>
        </body>
      </method>

      <method name="_adjustAcItem">
        <body>
          <![CDATA[
          var url = this.getAttribute("url");
          var title = this.getAttribute("title");
          var type = this.getAttribute("type");

          this.removeAttribute("actiontype");

          var setupUrl = true;

          // If the type includes an action, set up the item appropriately.
          var types = type.split(/\s+/);
          var actionIndex = types.indexOf("action");
          if (actionIndex >= 0) {
            let [,action, param] = url.match(/^moz-action:([^,]+),(.*)$/);
            this.setAttribute("actiontype", action);
            url = param;
            let desc = "]]>&action.switchToTab.label;<![CDATA[";
            this._setUpDescription(this._url, desc, true);
            setupUrl = false;

            // Remove the "action" substring so that the correct style, if any,
            // is applied below.
            types.splice(actionIndex, 1);
            type = types.join(" ");
          }

          // If we have a tag match, show the tags and icon
          if (type == "tag") {
            // Configure the extra box for tags display
            this._extraBox.hidden = false;
            this._extraBox.childNodes[0].hidden = false;
            this._extraBox.childNodes[1].hidden = true;
            this._extraBox.pack = "end";
            this._titleBox.flex = 1;

            // The title is separated from the tags by an endash
            let tags;
            [, title, tags] = title.match(/^(.+) \u2013 (.+)$/);

            // Each tag is split by a comma in an undefined order, so sort it
            let sortedTags = tags.split(",").sort().join(", ");

            // Emphasize the matching text in the tags
            this._setUpDescription(this._extra, sortedTags);

            // Treat tagged matches as bookmarks for the star
            type = "bookmark";
          } else if (type == "keyword") {
            // Configure the extra box for keyword display
            this._extraBox.hidden = false;
            this._extraBox.childNodes[0].hidden = true;
            this._extraBox.childNodes[1].hidden = false;
            this._extraBox.pack = "start";
            this._titleBox.flex = 0;

            // Put the parameters next to the title if we have any
            let search = this.getAttribute("text");
            let params = "";
            let paramsIndex = search.indexOf(' ');
            if (paramsIndex != -1)
              params = search.substr(paramsIndex + 1);

            // Emphasize the keyword parameters
            this._setUpDescription(this._extra, params);

            // Don't emphasize keyword searches in the title or url
            this.setAttribute("text", "");
          } else {
            // Hide the title's extra box if we don't need extra stuff
            this._extraBox.hidden = true;
            this._titleBox.flex = 1;
          }

          // Give the image the icon style and a special one for the type
          this._typeImage.className = "ac-type-icon" +
            (type ? " ac-result-type-" + type : "");

          // Show the url as the title if we don't have a title
          if (title == "")
            title = url;

          // Emphasize the matching search terms for the description
          this._setUpDescription(this._title, title);
          if (setupUrl)
            this._setUpDescription(this._url, url);

          // Set up overflow on a timeout because the contents of the box
          // might not have a width yet even though we just changed them
          setTimeout(this._setUpOverflow, 0, this._titleBox, this._titleOverflowEllipsis);
          setTimeout(this._setUpOverflow, 0, this._urlBox, this._urlOverflowEllipsis);
          ]]>
        </body>
      </method>

      <method name="_setUpOverflow">
        <parameter name="aParentBox"/>
        <parameter name="aEllipsis"/>
        <body>
          <![CDATA[
          // Hide the ellipsis incase there's just enough to not underflow
          aEllipsis.hidden = true;

          // Start with the parent's width and subtract off its children
          let tooltip = [];
          let children = aParentBox.childNodes;
          let widthDiff = aParentBox.boxObject.width;

          for (let i = 0; i < children.length; i++) {
            // Only consider a child if it actually takes up space
            let childWidth = children[i].boxObject.width;
            if (childWidth > 0) {
              // Subtract a little less to account for subpixel rounding
              widthDiff -= childWidth - .5;

              // Add to the tooltip if it's not hidden and has text
              let childText = children[i].textContent;
              if (childText)
                tooltip.push(childText);
            }
          }

          // If the children take up more space than the parent.. overflow!
          if (widthDiff < 0) {
            // Re-show the ellipsis now that we know it's needed
            aEllipsis.hidden = false;

            // Separate text components with a ndash --
            aParentBox.tooltipText = tooltip.join(" \u2013 ");
          }
          ]]>
        </body>
      </method>

      <method name="_doUnderflow">
        <parameter name="aName"/>
        <body>
          <![CDATA[
          // Hide the ellipsis right when we know we're underflowing instead of
          // waiting for the timeout to trigger the _setUpOverflow calculations
          this[aName + "Box"].tooltipText = "";
          this[aName + "OverflowEllipsis"].hidden = true;
          ]]>
        </body>
      </method>

    </implementation>
  </binding>

  <binding id="autocomplete-tree" extends="chrome://global/content/bindings/tree.xml#tree">
    <content>
      <children includes="treecols"/>
      <xul:treerows class="autocomplete-treerows tree-rows" xbl:inherits="hidescrollbar" flex="1">
        <children/>
      </xul:treerows>
    </content>
  </binding>

  <binding id="autocomplete-richlistbox" extends="chrome://global/content/bindings/richlistbox.xml#richlistbox">
    <implementation>
      <field name="mLastMoveTime">Date.now()</field>
    </implementation>
    <handlers>
      <handler event="mouseup">
        <![CDATA[
        // don't call onPopupClick for the scrollbar buttons, thumb, slider, etc.
        var item = event.originalTarget;

        while (item && item.localName != "richlistitem")
          item = item.parentNode;

        if (!item)
          return;

        this.parentNode.onPopupClick(event);
      ]]>
      </handler>

      <handler event="mousemove">
        <![CDATA[
        if (Date.now() - this.mLastMoveTime > 30) {
         var item = event.target;

         while (item && item.localName != "richlistitem")
           item = item.parentNode;

         if (!item)
           return;

         var rc = this.getIndexOfItem(item);
         if (rc != this.selectedIndex)
            this.selectedIndex = rc;

         this.mLastMoveTime = Date.now();
        }
      ]]>
      </handler>
    </handlers>
  </binding>

  <binding id="autocomplete-treebody">
    <implementation>
      <field name="mLastMoveTime">Date.now()</field>
    </implementation>

    <handlers>
      <handler event="mouseup" action="this.parentNode.parentNode.onPopupClick(event);"/>

      <handler event="mousedown"><![CDATA[
         var rc = this.parentNode.treeBoxObject.getRowAt(event.clientX, event.clientY);
         if (rc != this.parentNode.currentIndex)
            this.parentNode.view.selection.select(rc);
      ]]></handler>

      <handler event="mousemove"><![CDATA[
        if (Date.now() - this.mLastMoveTime > 30) {
         var rc = this.parentNode.treeBoxObject.getRowAt(event.clientX, event.clientY);
         if (rc != this.parentNode.currentIndex)
            this.parentNode.view.selection.select(rc);
         this.mLastMoveTime = Date.now();
        }
      ]]></handler>
    </handlers>
  </binding>

  <binding id="autocomplete-treerows">
    <content>
      <xul:hbox flex="1" class="tree-bodybox">
        <children/>
      </xul:hbox>
      <xul:scrollbar xbl:inherits="collapsed=hidescrollbar" orient="vertical" class="tree-scrollbar"/>
    </content>
  </binding>

  <binding id="history-dropmarker" extends="chrome://global/content/bindings/general.xml#dropmarker">
    <implementation>
      <method name="showPopup">
        <body><![CDATA[
          var textbox = document.getBindingParent(this);
          textbox.showHistoryPopup();
        ]]></body>
      </method>
    </implementation>

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

</bindings>