pjs/editor/ui/composer/content/editor.js

/* -*- Mode: Java; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** 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 code.
 *
 * The Initial Developer of the Original Code is
 * Netscape Communications Corporation.
 * Portions created by the Initial Developer are Copyright (C) 1998-1999
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Sammy Ford (sford@swbell.net)
 *   Dan Haddix (dan6992@hotmail.com)
 *   John Ratke (jratke@owc.net)
 *   Ryan Cassin (rcassin@supernova.org)
 *   Daniel Glazman (glazman@netscape.com)
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either of 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 ***** */

/* Main Composer window UI control */

var gComposerWindowControllerID = 0;
var prefAuthorString = "";

const kDisplayModeNormal = 0;
const kDisplayModeAllTags = 1;
const kDisplayModeSource = 2;
const kDisplayModePreview = 3;
const kDisplayModeMenuIDs = ["viewNormalMode", "viewAllTagsMode", "viewSourceMode", "viewPreviewMode"];
const kDisplayModeTabIDS = ["NormalModeButton", "TagModeButton", "SourceModeButton", "PreviewModeButton"];
const kNormalStyleSheet = "chrome://editor/content/EditorContent.css";
const kAllTagsStyleSheet = "chrome://editor/content/EditorAllTags.css";
const kParagraphMarksStyleSheet = "chrome://editor/content/EditorParagraphMarks.css";

const kTextMimeType = "text/plain";
const kHTMLMimeType = "text/html";

const nsIWebNavigation = Components.interfaces.nsIWebNavigation;

var gPreviousNonSourceDisplayMode = 1;
var gEditorDisplayMode = -1;
var gDocWasModified = false;  // Check if clean document, if clean then unload when user "Opens"
var gContentWindow = 0;
var gSourceContentWindow = 0;
var gSourceTextEditor = null;
var gContentWindowDeck;
var gFormatToolbar;
var gFormatToolbarHidden = false;
var gViewFormatToolbar;
var gColorObj = { LastTextColor:"", LastBackgroundColor:"", LastHighlightColor:"",
                  Type:"", SelectedType:"", NoDefault:false, Cancel:false,
                  HighlightColor:"", BackgroundColor:"", PageColor:"",
                  TextColor:"", TableColor:"", CellColor:""
                };
var gDefaultTextColor = "";
var gDefaultBackgroundColor = "";
var gCSSPrefListener;
var gEditorToolbarPrefListener;
var gReturnInParagraphPrefListener;
var gPrefs;
var gLocalFonts = null;

var gLastFocusNode = null;
var gLastFocusNodeWasSelected = false;

// These must be kept in synch with the XUL <options> lists
var gFontSizeNames = ["xx-small","x-small","small","medium","large","x-large","xx-large"];

const nsIFilePicker = Components.interfaces.nsIFilePicker;

const kEditorToolbarPrefs = "editor.toolbars.showbutton.";
const kUseCssPref         = "editor.use_css";
const kCRInParagraphsPref = "editor.CR_creates_new_p";

function getEngineWebBrowserPrint()
{
  return content.QueryInterface(Components.interfaces.nsIInterfaceRequestor)
                .getInterface(Components.interfaces.nsIWebBrowserPrint);
}

function ShowHideToolbarSeparators(toolbar) {
  var childNodes = toolbar.childNodes;
  var separator = null;
  var hideSeparator = true;
  for (var i = 0; childNodes[i].localName != "spacer"; i++) {
    if (childNodes[i].localName == "toolbarseparator") {
      if (separator)
        separator.hidden = true;
      separator = childNodes[i];
    } else if (!childNodes[i].hidden) {
      if (separator)
        separator.hidden = hideSeparator;
      separator = null;
      hideSeparator = false;
    }
  }
}

function ShowHideToolbarButtons()
{
  var array = gPrefs.getChildList(kEditorToolbarPrefs, {});
  for (var i in array) {
    var prefName = array[i];
    var id = prefName.substr(kEditorToolbarPrefs.length) + "Button";
    var button = document.getElementById(id);
    if (button)
      button.hidden = !gPrefs.getBoolPref(prefName);
  }
  ShowHideToolbarSeparators(document.getElementById("EditToolbar"));
  ShowHideToolbarSeparators(document.getElementById("FormatToolbar"));
}
  
function nsPrefListener(prefName)
{
  this.startup(prefName);
}

// implements nsIObserver
nsPrefListener.prototype =
{
  domain: "",
  startup: function(prefName)
  {
    this.domain = prefName;
    try {
      var pbi = pref.QueryInterface(Components.interfaces.nsIPrefBranch2);
      pbi.addObserver(this.domain, this, false);
    } catch(ex) {
      dump("Failed to observe prefs: " + ex + "\n");
    }
  },
  shutdown: function()
  {
    try {
      var pbi = pref.QueryInterface(Components.interfaces.nsIPrefBranch2);
      pbi.removeObserver(this.domain, this);
    } catch(ex) {
      dump("Failed to remove pref observers: " + ex + "\n");
    }
  },
  observe: function(subject, topic, prefName)
  {
    if (!IsHTMLEditor())
      return;
    // verify that we're changing a button pref
    if (topic != "nsPref:changed") return;
    
    var editor = GetCurrentEditor();
    if (prefName == kUseCssPref)
    {
      var cmd = document.getElementById("cmd_highlight");
      if (cmd) {
        var useCSS = gPrefs.getBoolPref(prefName);

        if (useCSS && editor) {
          var mixedObj = {};
          var state = editor.getHighlightColorState(mixedObj);
          cmd.setAttribute("state", state);
          cmd.collapsed = false;
        }      
        else {
          cmd.setAttribute("state", "transparent");
          cmd.collapsed = true;
        }

        if (editor)
          editor.isCSSEnabled = useCSS;
      }
    }
    else if (prefName.substr(0, kEditorToolbarPrefs.length) == kEditorToolbarPrefs)
    {
      var id = prefName.substr(kEditorToolbarPrefs.length) + "Button";
      var button = document.getElementById(id);
      if (button) {
        button.hidden = !gPrefs.getBoolPref(prefName);
        ShowHideToolbarSeparators(button.parentNode);
      }
    }
    else if (editor && (prefName == kCRInParagraphsPref))
      editor.returnInParagraphCreatesNewParagraph = gPrefs.getBoolPref(prefName);
  }
}

function AfterHighlightColorChange()
{
  if (!IsHTMLEditor())
    return;

  var button = document.getElementById("cmd_highlight");
  if (button) {
    var mixedObj = {};
    try {
      var state = GetCurrentEditor().getHighlightColorState(mixedObj);
      button.setAttribute("state", state);
      onHighlightColorChange();
    } catch (e) {}
  }      
}

function EditorOnLoad()
{
    // See if argument was passed.
    if ( window.arguments && window.arguments[0] ) {
        // Opened via window.openDialog with URL as argument.
        // Put argument where EditorStartup expects it.
        document.getElementById( "args" ).setAttribute( "value", window.arguments[0] );
    }

    // get default character set if provided
    if ("arguments" in window && window.arguments.length > 1 && window.arguments[1]) {
      if (window.arguments[1].indexOf("charset=") != -1) {
        var arrayArgComponents = window.arguments[1].split("=");
        if (arrayArgComponents) {
          // Put argument where EditorStartup expects it.
          document.getElementById( "args" ).setAttribute("charset", arrayArgComponents[1]);
        }
      }
    }

    window.tryToClose = EditorCanClose;

    // Continue with normal startup.
    EditorStartup();

    // Initialize our source text <editor>
    try {
      gSourceContentWindow = document.getElementById("content-source");
      gSourceContentWindow.makeEditable("text", false);
      gSourceTextEditor = gSourceContentWindow.getEditor(gSourceContentWindow.contentWindow);
      gSourceTextEditor.QueryInterface(Components.interfaces.nsIPlaintextEditor);
      gSourceTextEditor.enableUndo(false);
      gSourceTextEditor.rootElement.style.fontFamily = "-moz-fixed";
      gSourceTextEditor.rootElement.style.whiteSpace = "pre";
      gSourceTextEditor.rootElement.style.margin = 0;
      var controller = Components.classes["@mozilla.org/embedcomp/base-command-controller;1"]
                                 .createInstance(Components.interfaces.nsIControllerContext);
      controller.init(null);
      controller.setCommandContext(gSourceContentWindow);
      gSourceContentWindow.contentWindow.controllers.insertControllerAt(0, controller);
      var commandTable = controller.QueryInterface(Components.interfaces.nsIInterfaceRequestor)
                                   .getInterface(Components.interfaces.nsIControllerCommandTable);
      commandTable.registerCommand("cmd_find",        nsFindCommand);
      commandTable.registerCommand("cmd_findNext",    nsFindAgainCommand);
      commandTable.registerCommand("cmd_findPrev",    nsFindAgainCommand);
    } catch (e) { dump("makeEditable failed: "+e+"\n"); }
}

const gSourceTextListener =
{
  NotifyDocumentCreated: function NotifyDocumentCreated() {},
  NotifyDocumentWillBeDestroyed: function NotifyDocumentWillBeDestroyed() {},
  NotifyDocumentStateChanged: function NotifyDocumentStateChanged(isChanged)
  {
    window.updateCommands("save");
  }
};

const gSourceTextObserver =
{
  observe: function observe(aSubject, aTopic, aData)
  {
    // we currently only use this to update undo
    window.updateCommands("undo");
  }
};

function TextEditorOnLoad()
{
    // See if argument was passed.
    if ( window.arguments && window.arguments[0] ) {
        // Opened via window.openDialog with URL as argument.
        // Put argument where EditorStartup expects it.
        document.getElementById( "args" ).setAttribute( "value", window.arguments[0] );
    }
    // Continue with normal startup.
    EditorStartup();
}

// This should be called by all editor users when they close their window
//  or other similar "done with editor" actions, like recycling a Mail Composer window.
function EditorCleanup()
{
  SwitchInsertCharToAnotherEditorOrClose();
}

var DocumentReloadListener =
{
  NotifyDocumentCreated: function() {},
  NotifyDocumentWillBeDestroyed: function() {},

  NotifyDocumentStateChanged:function( isNowDirty )
  {
    var editor = GetCurrentEditor();
    try {
      // unregister the listener to prevent multiple callbacks
      editor.removeDocumentStateListener( DocumentReloadListener );

      var charset = editor.documentCharacterSet;

      // update the META charset with the current presentation charset
      editor.documentCharacterSet = charset;

    } catch (e) {}
  }
};

function addEditorClickEventListener()
{
  try {
    var bodyelement = GetBodyElement();
    if (bodyelement)
      bodyelement.addEventListener("click", EditorClick, false);
  } catch (e) {}
}

// implements nsIObserver
var gEditorDocumentObserver =
{ 
  observe: function(aSubject, aTopic, aData)
  {
    // Should we allow this even if NOT the focused editor?
    var commandManager = GetCurrentCommandManager();
    if (commandManager != aSubject)
      return;

    var editor = GetCurrentEditor();
    switch(aTopic)
    {
      case "obs_documentCreated":
        // Just for convenience
        gContentWindow = window.content;

        // Get state to see if document creation succeeded
        var params = newCommandParams();
        if (!params)
          return;

        try {
          commandManager.getCommandState(aTopic, gContentWindow, params);
          var errorStringId = 0;
          var editorStatus = params.getLongValue("state_data");
          if (!editor && editorStatus == nsIEditingSession.eEditorOK)
          {
            dump("\n ****** NO EDITOR BUT NO EDITOR ERROR REPORTED ******* \n\n");
            editorStatus = nsIEditingSession.eEditorErrorUnknown;
          }

          switch (editorStatus)
          {
            case nsIEditingSession.eEditorErrorCantEditFramesets:
              errorStringId = "CantEditFramesetMsg";
              break;
            case nsIEditingSession.eEditorErrorCantEditMimeType:
              errorStringId = "CantEditMimeTypeMsg";
              break;
            case nsIEditingSession.eEditorErrorUnknown:
              errorStringId = "CantEditDocumentMsg";
              break;
            // Note that for "eEditorErrorFileNotFound, 
            // network code popped up an alert dialog, so we don't need to
          }
          if (errorStringId)
            AlertWithTitle("", GetString(errorStringId));
        } catch(e) { dump("EXCEPTION GETTING obs_documentCreated state "+e+"\n"); }

        // We have a bad editor -- nsIEditingSession will rebuild an editor
        //   with a blank page, so simply abort here
        if (editorStatus)
          return; 

        if (!("InsertCharWindow" in window))
          window.InsertCharWindow = null;

        try {
          editor.QueryInterface(nsIEditorStyleSheets);

          //  and extra styles for showing anchors, table borders, smileys, etc
          editor.addOverrideStyleSheet(kNormalStyleSheet);
        } catch (e) {}

        // Things for just the Web Composer application
        if (IsWebComposer())
        {
          editor.returnInParagraphCreatesNewParagraph = gPrefs.getBoolPref(kCRInParagraphsPref);

          // Set focus to content window if not a mail composer
          // Race conditions prevent us from setting focus here
          //   when loading a url into blank window
          setTimeout(SetFocusOnStartup, 0);

          // Call EditorSetDefaultPrefsAndDoctype first so it gets the default author before initing toolbars
          EditorSetDefaultPrefsAndDoctype();

          // We may load a text document into an html editor,
          //   so be sure editortype is set correctly
          // XXX We really should use the "real" plaintext editor for this!
          if (editor.contentsMIMEType == "text/plain")
          {
            try {
              GetCurrentEditorElement().editortype = "text";
            } catch (e) { dump (e)+"\n"; }

            // Hide or disable UI not used for plaintext editing
            HideItem("FormatToolbar");
            HideItem("EditModeToolbar");
            HideItem("formatMenu");
            HideItem("tableMenu");
            HideItem("menu_validate");
            HideItem("sep_validate");
            HideItem("previewButton");
            HideItem("imageButton");
            HideItem("linkButton");
            HideItem("namedAnchorButton");
            HideItem("hlineButton");
            HideItem("tableButton");

            HideItem("fileExportToText");
            HideItem("previewInBrowser");

/* XXX When paste actually converts formatted rich text to pretty formatted plain text
       and pasteNoFormatting is fixed to paste the text without formatting (what paste
       currently does), then this item shouldn't be hidden: */
            HideItem("menu_pasteNoFormatting"); 

            HideItem("cmd_viewFormatToolbar");
            HideItem("cmd_viewEditModeToolbar");

            HideItem("viewSep1");
            HideItem("viewNormalMode");
            HideItem("viewAllTagsMode");
            HideItem("viewSourceMode");
            HideItem("viewPreviewMode");

            HideItem("structSpacer");

            // Hide everything in "Insert" except for "Symbols"
            var menuPopup = document.getElementById("insertMenuPopup");
            if (menuPopup)
            {
              var children = menuPopup.childNodes;
              for (var i=0; i < children.length; i++) 
              {
                var item = children.item(i);
                if (item.id != "insertChars")
                  item.hidden = true;
              }
            }
          }
    
          // Set window title
          UpdateWindowTitle();

          // We must wait until document is created to get proper Url
          // (Windows may load with local file paths)
          SetSaveAndPublishUI(GetDocumentUrl());

          // Start in "Normal" edit mode
          SetDisplayMode(kDisplayModeNormal);
        }

        // Add mouse click watcher if right type of editor
        if (IsHTMLEditor())
        {
          addEditorClickEventListener();

          // Force color widgets to update
          onFontColorChange();
          onBackgroundColorChange();
        }
        break;

      case "cmd_setDocumentModified":
        window.updateCommands("save");
        break;

      case "obs_documentWillBeDestroyed":
        dump("obs_documentWillBeDestroyed notification\n");
        break;

      case "obs_documentLocationChanged":
        // Ignore this when editor doesn't exist,
        //   which happens once when page load starts
        if (editor)
          try {
            editor.updateBaseURL();
          } catch(e) { dump (e); }
        break;

      case "cmd_bold":
        // Update all style items
        // cmd_bold is a proxy; see EditorSharedStartup (above) for details
        window.updateCommands("style");
        window.updateCommands("undo");
        break;
    }
  }
}

function SetFocusOnStartup()
{
  gContentWindow.focus();
}

function EditorStartup()
{
  var ds = GetCurrentEditorElement().docShell;
  ds.useErrorPages = false;
  var root = ds.QueryInterface(Components.interfaces.nsIDocShellTreeItem).
    rootTreeItem.QueryInterface(Components.interfaces.nsIDocShell);

  root.QueryInterface(Components.interfaces.nsIDocShell).appType =
    Components.interfaces.nsIDocShell.APP_TYPE_EDITOR;

  var is_HTMLEditor = IsHTMLEditor();
  if (is_HTMLEditor)
  {
    // XUL elements we use when switching from normal editor to edit source
    gContentWindowDeck = document.getElementById("ContentWindowDeck");
    gFormatToolbar = document.getElementById("FormatToolbar");
    gViewFormatToolbar = document.getElementById("viewFormatToolbar");
  }

  // set up our global prefs object
  GetPrefsService();

  // Startup also used by other editor users, such as Message Composer
  EditorSharedStartup();

  // Commands specific to the Composer Application window,
  //  (i.e., not embedded editors)
  //  such as file-related commands, HTML Source editing, Edit Modes...
  SetupComposerWindowCommands();

  ShowHideToolbarButtons();
  gEditorToolbarPrefListener = new nsPrefListener(kEditorToolbarPrefs);

  gCSSPrefListener = new nsPrefListener(kUseCssPref);
  gReturnInParagraphPrefListener = new nsPrefListener(kCRInParagraphsPref);

  // hide Highlight button if we are in an HTML editor with CSS mode off
  // and tell the editor if a CR in a paragraph creates a new paragraph
  var cmd = document.getElementById("cmd_highlight");
  if (cmd) {
    var useCSS = gPrefs.getBoolPref(kUseCssPref);
    if (!useCSS && is_HTMLEditor) {
      cmd.collapsed = true;
    }
  }

  // Get url for editor content and load it.
  // the editor gets instantiated by the edittingSession when the URL has finished loading.
  var url = document.getElementById("args").getAttribute("value");
  try {
    var charset = document.getElementById("args").getAttribute("charset");
    var contentViewer = GetCurrentEditorElement().docShell.contentViewer;
    contentViewer.QueryInterface(Components.interfaces.nsIMarkupDocumentViewer);
    contentViewer.defaultCharacterSet = charset;
    contentViewer.forceCharacterSet = charset;
  } catch (e) {}
  EditorLoadUrl(url);
}

function EditorLoadUrl(url)
{
  try {
    if (url)
      GetCurrentEditorElement().webNavigation.loadURI(url, // uri string
             nsIWebNavigation.LOAD_FLAGS_BYPASS_CACHE,     // load flags
             null,                                         // referrer
             null,                                         // post-data stream
             null);
  } catch (e) { dump(" EditorLoadUrl failed: "+e+"\n"); }
}

// This should be called by all Composer types
function EditorSharedStartup()
{
  // Just for convenience
  gContentWindow = window.content;

  // Set up the mime type and register the commands.
  if (IsHTMLEditor())
    SetupHTMLEditorCommands();
  else
    SetupTextEditorCommands();

  // add observer to be called when document is really done loading 
  // and is modified
  // Note: We're really screwed if we fail to install this observer!
  try {
    var commandManager = GetCurrentCommandManager();
    commandManager.addCommandObserver(gEditorDocumentObserver, "obs_documentCreated");
    commandManager.addCommandObserver(gEditorDocumentObserver, "cmd_setDocumentModified");
    commandManager.addCommandObserver(gEditorDocumentObserver, "obs_documentWillBeDestroyed");
    commandManager.addCommandObserver(gEditorDocumentObserver, "obs_documentLocationChanged");

    // Until nsIControllerCommandGroup-based code is implemented,
    //  we will observe just the bold command to trigger update of
    //  all toolbar style items
    commandManager.addCommandObserver(gEditorDocumentObserver, "cmd_bold");
  } catch (e) { dump(e); }

  var isMac = (GetOS() == gMac);

  // Set platform-specific hints for how to select cells
  // Mac uses "Cmd", all others use "Ctrl"
  var tableKey = GetString(isMac ? "XulKeyMac" : "TableSelectKey");
  var dragStr = tableKey+GetString("Drag");
  var clickStr = tableKey+GetString("Click");

  var delStr = GetString(isMac ? "Clear" : "Del");

  SafeSetAttribute("menu_SelectCell", "acceltext", clickStr);
  SafeSetAttribute("menu_SelectRow", "acceltext", dragStr);
  SafeSetAttribute("menu_SelectColumn", "acceltext", dragStr);
  SafeSetAttribute("menu_SelectAllCells", "acceltext", dragStr);
  // And add "Del" or "Clear"
  SafeSetAttribute("menu_DeleteCellContents", "acceltext", delStr);

  // Set text for indent, outdent keybinding

  // hide UI that we don't have components for
  RemoveInapplicableUIElements();

  gPrefs = GetPrefs();

  // Use browser colors as initial values for editor's default colors
  var BrowserColors = GetDefaultBrowserColors();
  if (BrowserColors)
  {
    gDefaultTextColor = BrowserColors.TextColor;
    gDefaultBackgroundColor = BrowserColors.BackgroundColor;
  }

  // For new window, no default last-picked colors
  gColorObj.LastTextColor = "";
  gColorObj.LastBackgroundColor = "";
  gColorObj.LastHighlightColor = "";
}

// This method is only called by Message composer when recycling a compose window
function EditorResetFontAndColorAttributes()
{
  try {  
    var editor = GetCurrentEditor();
    editor.rebuildDocumentFromSource("");
    // Because the selection is now collapsed, the following line
    // clears the typing state to discontinue all inline styles
    editor.removeAllInlineProperties();
    document.getElementById("cmd_fontFace").setAttribute("state", "");
    gColorObj.LastTextColor = "";
    gColorObj.LastBackgroundColor = "";
    gColorObj.LastHighlightColor = "";
    document.getElementById("cmd_fontColor").setAttribute("state", "");
    document.getElementById("cmd_backgroundColor").setAttribute("state", "");
    UpdateDefaultColors();
  } catch (e) {}
}

function EditorShutdown()
{
  gEditorToolbarPrefListener.shutdown();
  gCSSPrefListener.shutdown();
  gReturnInParagraphPrefListener.shutdown();

  try {
    var commandManager = GetCurrentCommandManager();
    commandManager.removeCommandObserver(gEditorDocumentObserver, "obs_documentCreated");
    commandManager.removeCommandObserver(gEditorDocumentObserver, "obs_documentWillBeDestroyed");
    commandManager.removeCommandObserver(gEditorDocumentObserver, "obs_documentLocationChanged");
  } catch (e) { dump (e); }   
}

function SafeSetAttribute(nodeID, attributeName, attributeValue)
{
    var theNode = document.getElementById(nodeID);
    if (theNode)
        theNode.setAttribute(attributeName, attributeValue);
}

function DocumentHasBeenSaved()
{
  var fileurl = "";
  try {
    fileurl = GetDocumentUrl();
  } catch (e) {
    return false;
  }

  if (!fileurl || IsUrlAboutBlank(fileurl))
    return false;

  // We have a file URL already
  return true;
}

function CheckAndSaveDocument(command, allowDontSave)
{
  var document;
  try {
    // if we don't have an editor or an document, bail
    var editor = GetCurrentEditor();
    document = editor.document;
    if (!document)
      return true;
  } catch (e) { return true; }

  if (!IsDocumentModified() && !IsHTMLSourceChanged())
    return true;

  // call window.focus, since we need to pop up a dialog
  // and therefore need to be visible (to prevent user confusion)
  top.document.commandDispatcher.focusedWindow.focus();  

  var scheme = GetScheme(GetDocumentUrl());
  var doPublish = (scheme && scheme != "file");

  var strID;
  switch (command)
  {
    case "cmd_close":
      strID = "BeforeClosing";
      break;
    case "cmd_preview":
      strID = "BeforePreview";
      break;
    case "cmd_editSendPage":
      strID = "SendPageReason";
      break;
    case "cmd_validate":
      strID = "BeforeValidate";
      break;
  }
    
  var reasonToSave = strID ? GetString(strID) : "";

  var title = document.title;
  if (!title)
    title = GetString("untitled");

  var dialogTitle = GetString(doPublish ? "PublishPage" : "SaveDocument");
  var dialogMsg = GetString(doPublish ? "PublishPrompt" : "SaveFilePrompt");
  dialogMsg = (dialogMsg.replace(/%title%/,title)).replace(/%reason%/,reasonToSave);

  var promptService = GetPromptService();
  if (!promptService)
    return false;

  var result = {value:0};
  var promptFlags = promptService.BUTTON_TITLE_CANCEL * promptService.BUTTON_POS_1;
  var button1Title = null;
  var button3Title = null;

  if (doPublish)
  {
    promptFlags += promptService.BUTTON_TITLE_IS_STRING * promptService.BUTTON_POS_0;
    button1Title = GetString("Publish");
    button3Title = GetString("DontPublish");    
  }
  else
  {
    promptFlags += promptService.BUTTON_TITLE_SAVE * promptService.BUTTON_POS_0;
  }

  // If allowing "Don't..." button, add that
  if (allowDontSave)
    promptFlags += doPublish ?
        (promptService.BUTTON_TITLE_IS_STRING * promptService.BUTTON_POS_2)
        : (promptService.BUTTON_TITLE_DONT_SAVE * promptService.BUTTON_POS_2);
  
  result = promptService.confirmEx(window, dialogTitle, dialogMsg, promptFlags,
                          button1Title, null, button3Title, null, {value:0});

  if (result == 0)
  {
    // Save, but first finish HTML source mode
    if (IsHTMLSourceChanged()) {
      try {
        FinishHTMLSource();
      } catch (e) { return false;}
    }

    if (doPublish)
    {
      // We save the command the user wanted to do in a global
      // and return as if user canceled because publishing is asynchronous
      // This command will be fired when publishing finishes
      gCommandAfterPublishing = command;
      goDoCommand("cmd_publish");
      return false;
    }

    // Save to local disk
    var contentsMIMEType;
    if (IsHTMLEditor())
      contentsMIMEType = kHTMLMimeType;
    else
      contentsMIMEType = kTextMimeType;
    var success = SaveDocument(false, false, contentsMIMEType);
    return success;
  }

  if (result == 2) // "Don't Save"
    return true;

  // Default or result == 1 (Cancel)
  return false;
}

// --------------------------- File menu ---------------------------


// used by openLocation. see openLocation.js for additional notes.
function delayedOpenWindow(chrome, flags, url)
{
  dump("setting timeout\n");
  setTimeout("window.openDialog('"+chrome+"','_blank','"+flags+"','"+url+"')", 10);
}

function EditorNewPlaintext()
{
  window.openDialog( "chrome://editor/content/TextEditorAppShell.xul",
                     "_blank",
                     "chrome,dialog=no,all",
                     "about:blank");
}

// Check for changes to document and allow saving before closing
// This is hooked up to the OS's window close widget (e.g., "X" for Windows)
function EditorCanClose()
{
  // Returns FALSE only if user cancels save action

  // "true" means allow "Don't Save" button
  var canClose = CheckAndSaveDocument("cmd_close", true);

  // This is our only hook into closing via the "X" in the caption
  //   or "Quit" (or other paths?)
  //   so we must shift association to another
  //   editor or close any non-modal windows now
  if (canClose && "InsertCharWindow" in window && window.InsertCharWindow)
    SwitchInsertCharToAnotherEditorOrClose();

  return canClose;
}

// --------------------------- View menu ---------------------------

function EditorSetDocumentCharacterSet(aCharset)
{
  try {
    var editor = GetCurrentEditor();
    editor.documentCharacterSet = aCharset;
    var docUrl = GetDocumentUrl();
    if( !IsUrlAboutBlank(docUrl))
    {
      // reloading the document will reverse any changes to the META charset, 
      // we need to put them back in, which is achieved by a dedicated listener
      editor.addDocumentStateListener( DocumentReloadListener );
      EditorLoadUrl(docUrl);
    }
  } catch (e) {}
}

// ------------------------------------------------------------------
function updateCharsetPopupMenu(menuPopup)
{
  if (IsDocumentModified() && !IsDocumentEmpty())
  {
    for (var i = 0; i < menuPopup.childNodes.length; i++)
    {
      var menuItem = menuPopup.childNodes[i];
      menuItem.setAttribute('disabled', 'true');
    }
  }
}

// --------------------------- Text style ---------------------------

function onParagraphFormatChange(paraMenuList, commandID)
{
  if (!paraMenuList)
    return;

  var commandNode = document.getElementById(commandID);
  var state = commandNode.getAttribute("state");

  // force match with "normal"
  if (state == "body")
    state = "";

  if (state == "mixed")
  {
    //Selection is the "mixed" ( > 1 style) state
    paraMenuList.selectedItem = null;
    paraMenuList.setAttribute("label",GetString('Mixed'));
  }
  else
  {
    var menuPopup = document.getElementById("ParagraphPopup");
    var menuItems = menuPopup.childNodes;
    for (var i=0; i < menuItems.length; i++)
    {
      var menuItem = menuItems.item(i);
      if ("value" in menuItem && menuItem.value == state)
      {
        paraMenuList.selectedItem = menuItem;
        break;
      }
    }
  }
}

function onFontFaceChange(fontFaceMenuList, commandID)
{
  var commandNode = document.getElementById(commandID);
  var state = commandNode.getAttribute("state");

  if (state == "mixed")
  {
    //Selection is the "mixed" ( > 1 style) state
    fontFaceMenuList.selectedItem = null;
    fontFaceMenuList.setAttribute("label",GetString('Mixed'));
  }
  else
  {
    var menuPopup = document.getElementById("FontFacePopup");
    var menuItems = menuPopup.childNodes;
    for (var i=0; i < menuItems.length; i++)
    {
      var menuItem = menuItems.item(i);
      if (menuItem.getAttribute("label") && ("value" in menuItem && menuItem.value.toLowerCase() == state.toLowerCase()))
      {
        fontFaceMenuList.selectedItem = menuItem;
        break;
      }
    }
  }
}

function EditorSelectFontSize()
{
  var select = document.getElementById("FontSizeSelect");
  if (select)
  {
    if (select.selectedIndex == -1)
      return;

    EditorSetFontSize(gFontSizeNames[select.selectedIndex]);
  }
}

function onFontSizeChange(fontSizeMenulist, commandID)
{
  // If we don't match anything, set to "0 (normal)"
  var newIndex = 2;
  var size = fontSizeMenulist.getAttribute("size");
  if ( size == "mixed")
  {
    // No single type selected
    newIndex = -1;
  }
  else
  {
    for (var i = 0; i < gFontSizeNames.length; i++)
    {
      if( gFontSizeNames[i] == size )
      {
        newIndex = i;
        break;
      }
    }
  }
  if (fontSizeMenulist.selectedIndex != newIndex)
    fontSizeMenulist.selectedIndex = newIndex;
}

function EditorSetFontSize(size)
{
  if( size == "0" || size == "normal" ||
      size == "medium" )
  {
    EditorRemoveTextProperty("font", "size");
    // Also remove big and small,
    //  else it will seem like size isn't changing correctly
    EditorRemoveTextProperty("small", "");
    EditorRemoveTextProperty("big", "");
  } else {
    // Temp: convert from new CSS size strings to old HTML size strings
    switch (size)
    {
      case "xx-small":
      case "x-small":
        size = "-2";
        break;
      case "small":
        size = "-1";
        break;
      case "large":
        size = "+1";
        break;
      case "x-large":
        size = "+2";
        break;
      case "xx-large":
        size = "+3";
        break;
    }
    EditorSetTextProperty("font", "size", size);
  }
  gContentWindow.focus();
}

function initFontFaceMenu(menuPopup)
{
  initLocalFontFaceMenu(menuPopup);

  if (menuPopup)
  {
    var children = menuPopup.childNodes;
    if (!children) return;

    var firstHas = { value: false };
    var anyHas = { value: false };
    var allHas = { value: false };

    // we need to set or clear the checkmark for each menu item since the selection
    // may be in a new location from where it was when the menu was previously opened

    // Fixed width (second menu item) is special case: old TT ("teletype") attribute
    EditorGetTextProperty("tt", "", "", firstHas, anyHas, allHas);
    children[1].setAttribute("checked", allHas.value);

    if (!anyHas.value)
      EditorGetTextProperty("font", "face", "", firstHas, anyHas, allHas);

    children[0].setAttribute("checked", !anyHas.value);

    // Skip over default, TT, and separator
    for (var i = 3; i < children.length; i++)
    {
      var menuItem = children[i];
      var faceType = menuItem.getAttribute("value");

      if (faceType)
      {
        EditorGetTextProperty("font", "face", faceType, firstHas, anyHas, allHas);

        // Check the menuitem only if all of selection has the face
        if (allHas.value)
        {
          menuItem.setAttribute("checked", "true");
          break;
        }

        // in case none match, make sure we've cleared the checkmark
        menuItem.removeAttribute("checked");
      }
    }
  }
}

const kFixedFontFaceMenuItems = 7; // number of fixed font face menuitems

function initLocalFontFaceMenu(menuPopup)
{
  if (!gLocalFonts)
  {
    // Build list of all local fonts once per editor
    try 
    {
      var enumerator = Components.classes["@mozilla.org/gfx/fontenumerator;1"]
                                 .getService(Components.interfaces.nsIFontEnumerator);
      var localFontCount = { value: 0 }
      gLocalFonts = enumerator.EnumerateAllFonts(localFontCount);
    }
    catch(e) { }
  }
  
  var useRadioMenuitems = (menuPopup.parentNode.localName == "menu"); // don't do this for menulists  
  if (menuPopup.childNodes.length == kFixedFontFaceMenuItems) 
  {
    if (gLocalFonts.length == 0) {
      menuPopup.childNodes[kFixedFontFaceMenuItems - 1].hidden = true;
    }
    for (var i = 0; i < gLocalFonts.length; ++i)
    {
      if (gLocalFonts[i] != "")
      {
        var itemNode = document.createElementNS(XUL_NS, "menuitem");
        itemNode.setAttribute("label", gLocalFonts[i]);
        itemNode.setAttribute("value", gLocalFonts[i]);
        if (useRadioMenuitems) {
          itemNode.setAttribute("type", "radio");
          itemNode.setAttribute("name", "2");
          itemNode.setAttribute("observes", "cmd_renderedHTMLEnabler");
        }
        menuPopup.appendChild(itemNode);
      }
    }
  }
}
 

function initFontSizeMenu(menuPopup)
{
  if (menuPopup)
  {
    var children = menuPopup.childNodes;
    if (!children) return;

    var firstHas = { value: false };
    var anyHas = { value: false };
    var allHas = { value: false };

    var sizeWasFound = false;

    // we need to set or clear the checkmark for each menu item since the selection
    // may be in a new location from where it was when the menu was previously opened

    // First 2 items add <small> and <big> tags
    // While it would be better to show the number of levels,
    //  at least this tells user if either of them are set
    var menuItem = children[0];
    if (menuItem)
    {
      EditorGetTextProperty("small", "", "", firstHas, anyHas, allHas);
      menuItem.setAttribute("checked", allHas.value);
      sizeWasFound = anyHas.value;
    }

    menuItem = children[1];
    if (menuItem)
    {
      EditorGetTextProperty("big", "", "", firstHas, anyHas, allHas);
      menuItem.setAttribute("checked", allHas.value);
      sizeWasFound |= anyHas.value;
    }

    // Fixed size items start after menu separator
    var menuIndex = 3;
    // Index of the medium (default) item
    var mediumIndex = 5;

    // Scan through all supported "font size" attribute values
    for (var i = -2; i <= 3; i++)
    {
      menuItem = children[menuIndex];

      // Skip over medium since it'll be set below.
      // If font size=0 is actually set, we'll toggle it off below if
      // we enter this loop in this case.
      if (menuItem && (i != 0))
      {
        var sizeString = (i <= 0) ? String(i) : ("+" + String(i));
        EditorGetTextProperty("font", "size", sizeString, firstHas, anyHas, allHas);
        // Check the item only if all of selection has the size...
        menuItem.setAttribute("checked", allHas.value);
        // ...but remember if ANY of of selection had size set
        sizeWasFound |= anyHas.value;
      }
      menuIndex++;
    }

    // if no size was found, then check default (medium)
    // note that no item is checked in the case of "mixed" selection
    children[mediumIndex].setAttribute("checked", !sizeWasFound);
  }
}

function onHighlightColorChange()
{
  var commandNode = document.getElementById("cmd_highlight");
  if (commandNode)
  {
    var color = commandNode.getAttribute("state");
    var button = document.getElementById("HighlightColorButton");
    if (button)
    {
      // No color set - get color set on page or other defaults
      if (!color)
        color = "transparent" ;

      button.setAttribute("style", "background-color:"+color+" !important");
    }
  }
}

function onFontColorChange()
{
  var commandNode = document.getElementById("cmd_fontColor");
  if (commandNode)
  {
    var color = commandNode.getAttribute("state");
    var button = document.getElementById("TextColorButton");
    if (button)
    {
      // No color set - get color set on page or other defaults
      if (!color)
        color = gDefaultTextColor;
      button.setAttribute("style", "background-color:"+color);
    }
  }
}

function onBackgroundColorChange()
{
  var commandNode = document.getElementById("cmd_backgroundColor");
  if (commandNode)
  {
    var color = commandNode.getAttribute("state");
    var button = document.getElementById("BackgroundColorButton");
    if (button)
    {
      if (!color)
        color = gDefaultBackgroundColor;

      button.setAttribute("style", "background-color:"+color);
    }
  }
}

// Call this when user changes text and/or background colors of the page
function UpdateDefaultColors()
{
  var BrowserColors = GetDefaultBrowserColors();
  var bodyelement = GetBodyElement();
  var defTextColor = gDefaultTextColor;
  var defBackColor = gDefaultBackgroundColor;

  if (bodyelement)
  {
    var color = bodyelement.getAttribute("text");
    if (color)
      gDefaultTextColor = color;
    else if (BrowserColors)
      gDefaultTextColor = BrowserColors.TextColor;

    color = bodyelement.getAttribute("bgcolor");
    if (color)
      gDefaultBackgroundColor = color;
    else if (BrowserColors)
      gDefaultBackgroundColor = BrowserColors.BackgroundColor;
  }

  // Trigger update on toolbar
  if (defTextColor != gDefaultTextColor)
  {
    goUpdateCommandState("cmd_fontColor");
    onFontColorChange();
  }
  if (defBackColor != gDefaultBackgroundColor)
  {
    goUpdateCommandState("cmd_backgroundColor");
    onBackgroundColorChange();
  }
}

function GetBackgroundElementWithColor()
{
  var editor = GetCurrentTableEditor();
  if (!editor)
    return null;

  gColorObj.Type = "";
  gColorObj.PageColor = "";
  gColorObj.TableColor = "";
  gColorObj.CellColor = "";
  gColorObj.BackgroundColor = "";
  gColorObj.SelectedType = "";

  var tagNameObj = { value: "" };
  var element;
  try {
    element = editor.getSelectedOrParentTableElement(tagNameObj, {value:0});
  }
  catch(e) {}

  if (element && tagNameObj && tagNameObj.value)
  {
    gColorObj.BackgroundColor = GetHTMLOrCSSStyleValue(element, "bgcolor", "background-color");
    gColorObj.BackgroundColor = ConvertRGBColorIntoHEXColor(gColorObj.BackgroundColor);
    if (tagNameObj.value.toLowerCase() == "td")
    {
      gColorObj.Type = "Cell";
      gColorObj.CellColor = gColorObj.BackgroundColor;

      // Get any color that might be on parent table
      var table = GetParentTable(element);
      gColorObj.TableColor = GetHTMLOrCSSStyleValue(table, "bgcolor", "background-color");
      gColorObj.TableColor = ConvertRGBColorIntoHEXColor(gColorObj.TableColor);
    }
    else
    {
      gColorObj.Type = "Table";
      gColorObj.TableColor = gColorObj.BackgroundColor;
    }
    gColorObj.SelectedType = gColorObj.Type;
  }
  else
  {
    var IsCSSPrefChecked = gPrefs.getBoolPref(kUseCssPref);
    if (IsCSSPrefChecked && IsHTMLEditor())
    {
      var selection = editor.selection;
      if (selection)
      {
        element = selection.focusNode;
        while (!editor.nodeIsBlock(element))
          element = element.parentNode;
      }
      else
      {
        element = GetBodyElement();
      }
    }
    else
    {
      element = GetBodyElement();
    }
    if (element)
    {
      gColorObj.Type = "Page";
      gColorObj.BackgroundColor = GetHTMLOrCSSStyleValue(element, "bgcolor", "background-color");
      if (gColorObj.BackgroundColor == "")
      {
        gColorObj.BackgroundColor = "transparent";
      }
      else
      {
        gColorObj.BackgroundColor = ConvertRGBColorIntoHEXColor(gColorObj.BackgroundColor);
      }
      gColorObj.PageColor = gColorObj.BackgroundColor;
    }
  }
  return element;
}

function SetSmiley(smileyText)
{
  try {
    GetCurrentEditor().insertText(smileyText);
    gContentWindow.focus();
  }
  catch(e) {}
}

function EditorSelectColor(colorType, mouseEvent)
{
  var editor = GetCurrentEditor();
  if (!editor || !gColorObj)
    return;

  // Shift + mouse click automatically applies last color, if available
  var useLastColor = mouseEvent ? ( mouseEvent.button == 0 && mouseEvent.shiftKey ) : false;
  var element;
  var table;
  var currentColor = "";
  var commandNode;

  if (!colorType)
    colorType = "";

  if (colorType == "Text")
  {
    gColorObj.Type = colorType;

    // Get color from command node state
    commandNode = document.getElementById("cmd_fontColor");
    currentColor = commandNode.getAttribute("state");
    currentColor = ConvertRGBColorIntoHEXColor(currentColor);
    gColorObj.TextColor = currentColor;

    if (useLastColor && gColorObj.LastTextColor )
      gColorObj.TextColor = gColorObj.LastTextColor;
    else
      useLastColor = false;
  }
  else if (colorType == "Highlight")
  {
    gColorObj.Type = colorType;

    // Get color from command node state
    commandNode = document.getElementById("cmd_highlight");
    currentColor = commandNode.getAttribute("state");
    currentColor = ConvertRGBColorIntoHEXColor(currentColor);
    gColorObj.HighlightColor = currentColor;

    if (useLastColor && gColorObj.LastHighlightColor )
      gColorObj.HighlightColor = gColorObj.LastHighlightColor;
    else
      useLastColor = false;
  }
  else
  {
    element = GetBackgroundElementWithColor();
    if (!element)
      return;

    // Get the table if we found a cell
    if (gColorObj.Type == "Table")
      table = element;
    else if (gColorObj.Type == "Cell")
      table = GetParentTable(element);

    // Save to avoid resetting if not necessary
    currentColor = gColorObj.BackgroundColor;

    if (colorType == "TableOrCell" || colorType == "Cell")
    {
      if (gColorObj.Type == "Cell")
        gColorObj.Type = colorType;
      else if (gColorObj.Type != "Table")
        return;
    }
    else if (colorType == "Table" && gColorObj.Type == "Page")
      return;

    if (colorType == "" && gColorObj.Type == "Cell")
    {
      // Using empty string for requested type means
      //  we can let user select cell or table
      gColorObj.Type = "TableOrCell";
    }

    if (useLastColor && gColorObj.LastBackgroundColor )
      gColorObj.BackgroundColor = gColorObj.LastBackgroundColor;
    else
      useLastColor = false;
  }
  // Save the type we are really requesting
  colorType = gColorObj.Type;

  if (!useLastColor)
  {
    // Avoid the JS warning
    gColorObj.NoDefault = false;

    // Launch the ColorPicker dialog
    // TODO: Figure out how to position this under the color buttons on the toolbar
    window.openDialog("chrome://editor/content/EdColorPicker.xul", "_blank", "chrome,close,titlebar,modal", "", gColorObj);

    // User canceled the dialog
    if (gColorObj.Cancel)
      return;
  }

  if (gColorObj.Type == "Text")
  {
    if (currentColor != gColorObj.TextColor)
    {
      if (gColorObj.TextColor)
        EditorSetTextProperty("font", "color", gColorObj.TextColor);
      else
        EditorRemoveTextProperty("font", "color");
    }
    // Update the command state (this will trigger color button update)
    goUpdateCommandState("cmd_fontColor");
  }
  else if (gColorObj.Type == "Highlight")
  {
    if (currentColor != gColorObj.HighlightColor)
    {
      if (gColorObj.HighlightColor)
        EditorSetTextProperty("font", "bgcolor", gColorObj.HighlightColor);
      else
        EditorRemoveTextProperty("font", "bgcolor");
    }
    // Update the command state (this will trigger color button update)
    goUpdateCommandState("cmd_highlight");
  }
  else if (element)
  {
    if (gColorObj.Type == "Table")
    {
      // Set background on a table
      // Note that we shouldn't trust "currentColor" because of "TableOrCell" behavior
      if (table)
      {
        var bgcolor = table.getAttribute("bgcolor");
        if (bgcolor != gColorObj.BackgroundColor)
        try {
          if (gColorObj.BackgroundColor)
            editor.setAttributeOrEquivalent(table, "bgcolor", gColorObj.BackgroundColor, false);
          else
            editor.removeAttributeOrEquivalent(table, "bgcolor", false);
        } catch (e) {}
      }
    }
    else if (currentColor != gColorObj.BackgroundColor && IsHTMLEditor())
    {
      editor.beginTransaction();
      try
      {
        editor.setBackgroundColor(gColorObj.BackgroundColor);

        if (gColorObj.Type == "Page" && gColorObj.BackgroundColor)
        {
          // Set all page colors not explicitly set,
          //  else you can end up with unreadable pages
          //  because viewer's default colors may not be same as page author's
          var bodyelement = GetBodyElement();
          if (bodyelement)
          {
            var defColors = GetDefaultBrowserColors();
            if (defColors)
            {
              if (!bodyelement.getAttribute("text"))
                editor.setAttributeOrEquivalent(bodyelement, "text", defColors.TextColor, false);

              // The following attributes have no individual CSS declaration counterparts
              // Getting rid of them in favor of CSS implies CSS rules management
              if (!bodyelement.getAttribute("link"))
                editor.setAttribute(bodyelement, "link", defColors.LinkColor);

              if (!bodyelement.getAttribute("alink"))
                editor.setAttribute(bodyelement, "alink", defColors.ActiveLinkColor);

              if (!bodyelement.getAttribute("vlink"))
                editor.setAttribute(bodyelement, "vlink", defColors.VisitedLinkColor);
            }
          }
        }
      }
      catch(e) {}

      editor.endTransaction();
    }

    goUpdateCommandState("cmd_backgroundColor");
  }
  gContentWindow.focus();
}

function GetParentTable(element)
{
  var node = element;
  while (node)
  {
    if (node.nodeName.toLowerCase() == "table")
      return node;

    node = node.parentNode;
  }
  return node;
}

function GetParentTableCell(element)
{
  var node = element;
  while (node)
  {
    if (node.nodeName.toLowerCase() == "td" || node.nodeName.toLowerCase() == "th")
      return node;

    node = node.parentNode;
  }
  return node;
}

function EditorDblClick(event)
{
  // We check event.explicitOriginalTarget here because .target will never
  // be a textnode (bug 193689)
  if (event.explicitOriginalTarget)
  {
    // Only bring up properties if clicked on an element or selected link
    var element;
    try {
      element = event.explicitOriginalTarget.QueryInterface(
                    Components.interfaces.nsIDOMElement);
    } catch (e) {}

     //  We use "href" instead of "a" to not be fooled by named anchor
    if (!element)
      try {
        element = GetCurrentEditor().getSelectedElement("href");
      } catch (e) {}

    if (element)
    {
      goDoCommand("cmd_objectProperties");  
      event.preventDefault();
    }
  }
}

function EditorClick(event)
{
  if (!event)
    return;

  if (event.detail == 2)
  {
    EditorDblClick(event);
    return;
  }

  // For Web Composer: In Show All Tags Mode,
  // single click selects entire element,
  //  except for body and table elements
  if (IsWebComposer() && event.explicitOriginalTarget && IsHTMLEditor() &&
      gEditorDisplayMode == kDisplayModeAllTags)
  {
    try
    {
      // We check event.explicitOriginalTarget here because .target will never
      // be a textnode (bug 193689)
      var element = event.explicitOriginalTarget.QueryInterface(
                        Components.interfaces.nsIDOMElement);
      var name = element.localName.toLowerCase();
      if (name != "body" && name != "table" &&
          name != "td" && name != "th" && name != "caption" && name != "tr")
      {          
        GetCurrentEditor().selectElement(event.explicitOriginalTarget);
        event.preventDefault();
      }
    } catch (e) {}
  }
}

/*TODO: We need an oncreate hook to do enabling/disabling for the
        Format menu. There should be code like this for the
        object-specific "Properties" item
*/
// For property dialogs, we want the selected element,
//  but will accept a parent link, list, or table cell if inside one
function GetObjectForProperties()
{
  var editor = GetCurrentEditor();
  if (!editor || !IsHTMLEditor())
    return null;

  var element;
  try {
    element = editor.getSelectedElement("");
  } catch (e) {}
  if (element)
    return element;

  // Find nearest parent of selection anchor node
  //   that is a link, list, table cell, or table

  var anchorNode
  var node;
  try {
    anchorNode = editor.selection.anchorNode;
    if (anchorNode.firstChild)
    {
      // Start at actual selected node
      var offset = editor.selection.anchorOffset;
      // Note: If collapsed, offset points to element AFTER caret,
      //  thus node may be null
      node = anchorNode.childNodes.item(offset);
    }
    if (!node)
      node = anchorNode;
  } catch (e) {}

  while (node)
  {
    if (node.nodeName)
    {
      var nodeName = node.nodeName.toLowerCase();

      // Done when we hit the body
      if (nodeName == "body") break;

      if ((nodeName == "a" && node.href) ||
          nodeName == "ol" || nodeName == "ul" || nodeName == "dl" ||
          nodeName == "td" || nodeName == "th" ||
          nodeName == "table")
      {
        return node;
      }
    }
    node = node.parentNode;
  }
  return null;
}

function SetEditMode(mode)
{
  if (!IsHTMLEditor())
    return;

  var bodyElement = GetBodyElement();
  if (!bodyElement)
  {
    dump("SetEditMode: We don't have a body node!\n");
    return;
  }

  // must have editor if here!
  var editor = GetCurrentEditor();

  // Switch the UI mode before inserting contents
  //   so user can't type in source window while new window is being filled
  var previousMode = gEditorDisplayMode;
  if (!SetDisplayMode(mode))
    return;

  if (mode == kDisplayModeSource)
  {
    // Display the DOCTYPE as a non-editable string above edit area
    var domdoc;
    try { domdoc = editor.document; } catch (e) { dump( e + "\n");}
    if (domdoc)
    {
      var doctypeNode = document.getElementById("doctype-text");
      var dt = domdoc.doctype;
      if (doctypeNode)
      {
        if (dt)
        {
          doctypeNode.collapsed = false;
          var doctypeText = "<!DOCTYPE " + domdoc.doctype.name;
          if (dt.publicId)
            doctypeText += " PUBLIC \"" + domdoc.doctype.publicId;
          if (dt.systemId)
            doctypeText += " "+"\"" + dt.systemId;
          doctypeText += "\">"
          doctypeNode.setAttribute("value", doctypeText);
        }
        else
          doctypeNode.collapsed = true;
      }
    }
    // Get the entire document's source string

    var flags = (editor.documentCharacterSet == "ISO-8859-1")
      ? kOutputEncodeLatin1Entities
      : kOutputEncodeBasicEntities;
    try { 
      var encodeEntity = gPrefs.getCharPref("editor.encode_entity");
      switch (encodeEntity) {
        case "basic"  : flags = kOutputEncodeBasicEntities; break;
        case "latin1" : flags = kOutputEncodeLatin1Entities; break;
        case "html"   : flags = kOutputEncodeHTMLEntities; break;
        case "none"   : flags = 0;     break;
      }
    } catch (e) { }

    try { 
      var prettyPrint = gPrefs.getBoolPref("editor.prettyprint");
      if (prettyPrint)
        flags |= kOutputFormatted;

    } catch (e) {}

    flags |= kOutputLFLineBreak;
    var source = editor.outputToString(kHTMLMimeType, flags);
    var start = source.search(/<html/i);
    if (start == -1) start = 0;
    gSourceTextEditor.insertText(source.slice(start));
    gSourceTextEditor.resetModificationCount();
    gSourceTextEditor.addDocumentStateListener(gSourceTextListener);
    gSourceTextEditor.enableUndo(true);
    gSourceContentWindow.commandManager.addCommandObserver(gSourceTextObserver, "cmd_undo");
    gSourceContentWindow.contentWindow.focus();
    goDoCommand("cmd_moveTop");
  }
  else if (previousMode == kDisplayModeSource)
  {
    // Only rebuild document if a change was made in source window
    if (IsHTMLSourceChanged())
    {
      // Reduce the undo count so we don't use too much memory
      //   during multiple uses of source window 
      //   (reinserting entire doc caches all nodes)
      try {
        editor.transactionManager.maxTransactionCount = 1;
      } catch (e) {}

      editor.beginTransaction();
      try {
        // We are coming from edit source mode,
        //   so transfer that back into the document
        source = gSourceTextEditor.outputToString(kTextMimeType, kOutputLFLineBreak);
        editor.rebuildDocumentFromSource(source);

        // Get the text for the <title> from the newly-parsed document
        // (must do this for proper conversion of "escaped" characters)
        var title = "";
        var titlenodelist = editor.document.getElementsByTagName("title");
        if (titlenodelist)
        {
          var titleNode = titlenodelist.item(0);
          if (titleNode && titleNode.firstChild && titleNode.firstChild.data)
            title = titleNode.firstChild.data;
        }
        if (editor.document.title != title)
          SetDocumentTitle(title);

      } catch (ex) {
        dump(ex);
      }
      editor.endTransaction();

      // Restore unlimited undo count
      try {
        editor.transactionManager.maxTransactionCount = -1;
      } catch (e) {}
    }

    // Clear out the string buffers
    gSourceContentWindow.commandManager.removeCommandObserver(gSourceTextObserver, "cmd_undo");
    gSourceTextEditor.removeDocumentStateListener(gSourceTextListener);
    gSourceTextEditor.enableUndo(false);
    gSourceTextEditor.selectAll();
    gSourceTextEditor.deleteSelection(gSourceTextEditor.eNone);
    gSourceTextEditor.resetModificationCount();

    gContentWindow.focus();
  }
}

function CancelHTMLSource()
{
  // Don't convert source text back into the DOM document
  gSourceTextEditor.resetModificationCount();
  SetDisplayMode(gPreviousNonSourceDisplayMode);
}

function FinishHTMLSource()
{
  //Here we need to check whether the HTML source contains <head> and <body> tags
  //Or RebuildDocumentFromSource() will fail.
  if (IsInHTMLSourceMode())
  {
    var htmlSource = gSourceTextEditor.outputToString(kTextMimeType, kOutputLFLineBreak);
    if (htmlSource.length > 0)
    {
      var beginHead = htmlSource.indexOf("<head");
      if (beginHead == -1)
      {
        AlertWithTitle(GetString("Alert"), GetString("NoHeadTag"));
        //cheat to force back to Source Mode
        gEditorDisplayMode = kDisplayModePreview;
        SetDisplayMode(kDisplayModeSource);
        throw Components.results.NS_ERROR_FAILURE;
      }

      var beginBody = htmlSource.indexOf("<body");
      if (beginBody == -1)
      {
        AlertWithTitle(GetString("Alert"), GetString("NoBodyTag"));
        //cheat to force back to Source Mode
        gEditorDisplayMode = kDisplayModePreview;
        SetDisplayMode(kDisplayModeSource);
        throw Components.results.NS_ERROR_FAILURE;
      }
    }
  }

  // Switch edit modes -- converts source back into DOM document
  SetEditMode(gPreviousNonSourceDisplayMode);
}

function SetDisplayMode(mode)
{
  if (!IsHTMLEditor())
    return false;

  // Already in requested mode:
  //  return false to indicate we didn't switch
  if (mode == gEditorDisplayMode)
    return false;

  var previousMode = gEditorDisplayMode;
  gEditorDisplayMode = mode;

  ResetStructToolbar();
  if (mode == kDisplayModeSource)
  {
    // Switch to the sourceWindow (second in the deck)
    gContentWindowDeck.selectedIndex = 1;

    //Hide the formatting toolbar if not already hidden
    gFormatToolbarHidden = gFormatToolbar.hidden;
    gFormatToolbar.hidden = true;
    gViewFormatToolbar.hidden = true;

    gSourceContentWindow.contentWindow.focus();
  }
  else
  {
    // Save the last non-source mode so we can cancel source editing easily
    gPreviousNonSourceDisplayMode = mode;

    // Load/unload appropriate override style sheet
    try {
      var editor = GetCurrentEditor();
      editor.QueryInterface(nsIEditorStyleSheets);
      editor instanceof Components.interfaces.nsIHTMLObjectResizer;

      switch (mode)
      {
        case kDisplayModePreview:
          // Disable all extra "edit mode" style sheets 
          editor.enableStyleSheet(kNormalStyleSheet, false);
          editor.enableStyleSheet(kAllTagsStyleSheet, false);
          editor.isImageResizingEnabled = true;
          break;

        case kDisplayModeNormal:
          editor.addOverrideStyleSheet(kNormalStyleSheet);
          // Disable ShowAllTags mode
          editor.enableStyleSheet(kAllTagsStyleSheet, false);
          editor.isImageResizingEnabled = true;
          break;

        case kDisplayModeAllTags:
          editor.addOverrideStyleSheet(kNormalStyleSheet);
          editor.addOverrideStyleSheet(kAllTagsStyleSheet);
          // don't allow resizing in AllTags mode because the visible tags
          // change the computed size of images and tables...
          if (editor.resizedObject) {
            editor.hideResizers();
          }
          editor.isImageResizingEnabled = false;
          break;
      }
    } catch(e) {}

    // Switch to the normal editor (first in the deck)
    gContentWindowDeck.selectedIndex = 0;

    // Restore menus and toolbars
    gFormatToolbar.hidden = gFormatToolbarHidden;
    gViewFormatToolbar.hidden = false;

    gContentWindow.focus();
  }

  // update commands to disable or re-enable stuff
  window.updateCommands("mode_switch");

  // Set the selected tab at bottom of window:
  // (Note: Setting "selectedIndex = mode" won't redraw tabs when menu is used.)
  document.getElementById("EditModeTabs").selectedItem = document.getElementById(kDisplayModeTabIDS[mode]);

  // Uncheck previous menuitem and set new check since toolbar may have been used
  if (previousMode >= 0)
    document.getElementById(kDisplayModeMenuIDs[previousMode]).setAttribute("checked","false");
  document.getElementById(kDisplayModeMenuIDs[mode]).setAttribute("checked","true");
  

  return true;
}

function EditorToggleParagraphMarks()
{
  var menuItem = document.getElementById("viewParagraphMarks");
  if (menuItem)
  {
    // Note that the 'type="checbox"' mechanism automatically
    //  toggles the "checked" state before the oncommand is called,
    //  so if "checked" is true now, it was just switched to that mode
    var checked = menuItem.getAttribute("checked");
    try {
      var editor = GetCurrentEditor();
      editor.QueryInterface(nsIEditorStyleSheets);

      if (checked == "true")
        editor.addOverrideStyleSheet(kParagraphMarksStyleSheet);
      else
        editor.enableStyleSheet(kParagraphMarksStyleSheet, false);
    }
    catch(e) { return; }
  }
}

function InitPasteAsMenu()
{
  var menuItem = document.getElementById("menu_pasteTable")
  if(menuItem)
  {
    menuItem.IsInTable  
    menuItem.setAttribute("label", GetString(IsInTable() ? "NestedTable" : "Table"));
   // menuItem.setAttribute("accesskey",GetString("ObjectPropertiesAccessKey"));
  }
  // TODO: Do enabling based on what is in the clipboard
}

function UpdateWindowTitle()
{
  try {
    var windowTitle = GetDocumentTitle();
    if (!windowTitle)
      windowTitle = GetString("untitled");

    // Append just the 'leaf' filename to the Doc. Title for the window caption
    var docUrl = GetDocumentUrl();
    if (docUrl && !IsUrlAboutBlank(docUrl))
    {
      var scheme = GetScheme(docUrl);
      var filename = GetFilename(docUrl);
      if (filename)
        windowTitle += " [" + scheme + ":/.../" + filename + "]";

      // Save changed title in the recent pages data in prefs
      SaveRecentFilesPrefs();
    }
    // Set window title with " - Composer" appended
    var xulWin = document.documentElement;
    document.title = windowTitle + xulWin.getAttribute("titlemenuseparator") + 
                     xulWin.getAttribute("titlemodifier");
  } catch (e) { dump(e); }
}

function BuildRecentPagesMenu()
{
  var editor = GetCurrentEditor();
  if (!editor || !gPrefs)
    return;

  var popup = document.getElementById("menupopup_RecentFiles");
  if (!popup || !editor.document)
    return;

  // Delete existing menu
  while (popup.firstChild)
    popup.removeChild(popup.firstChild);

  // Current page is the "0" item in the list we save in prefs,
  //  but we don't include it in the menu.
  var curUrl = StripPassword(GetDocumentUrl());
  var historyCount = 10;
  try {
    historyCount = gPrefs.getIntPref("editor.history.url_maximum");
  } catch(e) {}
  var menuIndex = 1;

  for (var i = 0; i < historyCount; i++)
  {
    var url = GetUnicharPref("editor.history_url_"+i);

    // Skip over current url
    if (url && url != curUrl)
    {
      // Build the menu
      var title = GetUnicharPref("editor.history_title_"+i);
      AppendRecentMenuitem(popup, title, url, menuIndex);
      menuIndex++;
    }
  }
}

function SaveRecentFilesPrefs()
{
  // Can't do anything if no prefs
  if (!gPrefs) return;

  var curUrl = StripPassword(GetDocumentUrl());
  var historyCount = 10;
  try {
    historyCount = gPrefs.getIntPref("editor.history.url_maximum"); 
  } catch(e) {}

  var titleArray = [];
  var urlArray = [];

  if (historyCount && !IsUrlAboutBlank(curUrl) &&  GetScheme(curUrl) != "data")
  {
    titleArray.push(GetDocumentTitle());
    urlArray.push(curUrl);
  }

  for (var i = 0; i < historyCount && urlArray.length < historyCount; i++)
  {
    var url = GetUnicharPref("editor.history_url_"+i);

    // Continue if URL pref is missing because 
    //  a URL not found during loading may have been removed

    // Skip over current an "data" URLs
    if (url && url != curUrl && GetScheme(url) != "data")
    {
      var title = GetUnicharPref("editor.history_title_"+i);
      titleArray.push(title);
      urlArray.push(url);
    }
  }

  // Resave the list back to prefs in the new order
  for (i = 0; i < urlArray.length; i++)
  {
    SetUnicharPref("editor.history_title_"+i, titleArray[i]);
    SetUnicharPref("editor.history_url_"+i, urlArray[i]);
  }
}

function AppendRecentMenuitem(menupopup, title, url, menuIndex)
{
  if (menupopup)
  {
    var menuItem = document.createElementNS(XUL_NS, "menuitem");
    if (menuItem)
    {
      var accessKey;
      if (menuIndex <= 9)
        accessKey = String(menuIndex);
      else if (menuIndex == 10)
        accessKey = "0";
      else
        accessKey = " ";

      var itemString = accessKey+" ";

      // Show "title [url]" or just the URL
      if (title)
      {
       itemString += title;
       itemString += " [";
      }
      itemString += url;
      if (title)
        itemString += "]";

      menuItem.setAttribute("label", itemString);
      menuItem.setAttribute("crop", "center");
      menuItem.setAttribute("value", url);
      if (accessKey != " ")
        menuItem.setAttribute("accesskey", accessKey);
      menupopup.appendChild(menuItem);
    }
  }
}

function EditorInitFileMenu()
{
  // Disable "Save" menuitem when editing remote url. User should use "Save As"
  var docUrl = GetDocumentUrl();
  var scheme = GetScheme(docUrl);
  if (scheme && scheme != "file")
    SetElementEnabledById("saveMenuitem", false);

  // Enable recent pages submenu if there are any history entries in prefs
  var historyUrl = "";

  var historyCount = 10;
  try { historyCount = gPrefs.getIntPref("editor.history.url_maximum"); } catch(e) {}
  if (historyCount)
  {
    historyUrl = GetUnicharPref("editor.history_url_0");
    
    // See if there's more if current file is only entry in history list
    if (historyUrl && historyUrl == docUrl)
      historyUrl = GetUnicharPref("editor.history_url_1");
  }
  SetElementEnabledById("menu_RecentFiles", historyUrl != "");
}

function EditorInitFormatMenu()
{
  try {
    InitObjectPropertiesMenuitem("objectProperties");
    InitRemoveStylesMenuitems("removeStylesMenuitem", "removeLinksMenuitem", "removeNamedAnchorsMenuitem");
  } catch(ex) {}
}

function InitObjectPropertiesMenuitem(id)
{
  // Set strings and enable for the [Object] Properties item
  // Note that we directly do the enabling instead of
  //  using goSetCommandEnabled since we already have the menuitem
  var menuItem = document.getElementById(id);
  if (!menuItem) return null;

  var element;
  var menuStr = GetString("AdvancedProperties");
  var name;

  if (IsEditingRenderedHTML())
    element = GetObjectForProperties();

  if (element && element.nodeName)
  {
    var objStr = "";
    menuItem.setAttribute("disabled", "");
    name = element.nodeName.toLowerCase();
    switch (name)
    {
      case "img":
        // Check if img is enclosed in link
        //  (use "href" to not be fooled by named anchor)
        try
        {
          if (GetCurrentEditor().getElementOrParentByTagName("href", element))
            objStr = GetString("ImageAndLink");
        } catch(e) {}
        
        if (objStr == "")
          objStr = GetString("Image");
        break;
      case "hr":
        objStr = GetString("HLine");
        break;
      case "table":
        objStr = GetString("Table");
        break;
      case "th":
        name = "td";
      case "td":
        objStr = GetString("TableCell");
        break;
      case "ol":
      case "ul":
      case "dl":
        objStr = GetString("List");
        break;
      case "li":
        objStr = GetString("ListItem");
        break;
      case "form":
        objStr = GetString("Form");
        break;
      case "input":
        var type = element.getAttribute("type");
        if (type && type.toLowerCase() == "image")
          objStr = GetString("InputImage");
        else
          objStr = GetString("InputTag");
        break;
      case "textarea":
        objStr = GetString("TextArea");
        break;
      case "select":
        objStr = GetString("Select");
        break;
      case "button":
        objStr = GetString("Button");
        break;
      case "label":
        objStr = GetString("Label");
        break;
      case "fieldset":
        objStr = GetString("FieldSet");
        break;
      case "a":
        if (element.name)
        {
          objStr = GetString("NamedAnchor");
          name = "anchor";
        }
        else if(element.href)
        {
          objStr = GetString("Link");
          name = "href";
        }
        break;
    }
    if (objStr)
      menuStr = GetString("ObjectProperties").replace(/%obj%/,objStr);
  }
  else
  {
    // We show generic "Properties" string, but disable menu item
    menuItem.setAttribute("disabled","true");
  }
  menuItem.setAttribute("label", menuStr);
  menuItem.setAttribute("accesskey",GetString("ObjectPropertiesAccessKey"));
  return name;
}

function InitParagraphMenu()
{
  var mixedObj = { value: null };
  var state;
  try {
    state = GetCurrentEditor().getParagraphState(mixedObj);
  }
  catch(e) {}
  var IDSuffix;

  // PROBLEM: When we get blockquote, it masks other styles contained by it
  // We need a separate method to get blockquote state

  // We use "x" as uninitialized paragraph state
  if (!state || state == "x")
    IDSuffix = "bodyText" // No paragraph container
  else
    IDSuffix = state;

  // Set "radio" check on one item, but...
  var menuItem = document.getElementById("menu_"+IDSuffix);
  menuItem.setAttribute("checked", "true");

  // ..."bodyText" is returned if mixed selection, so remove checkmark
  if (mixedObj.value)
    menuItem.setAttribute("checked", "false");
}

function GetListStateString()
{
  try {
    var editor = GetCurrentEditor();

    var mixedObj = { value: null };
    var hasOL = { value: false };
    var hasUL = { value: false };
    var hasDL = { value: false };
    editor.getListState(mixedObj, hasOL, hasUL, hasDL);

    if (mixedObj.value)
      return "mixed";
    if (hasOL.value)
      return "ol";
    if (hasUL.value)
      return "ul";

    if (hasDL.value)
    {
      var hasLI = { value: false };
      var hasDT = { value: false };
      var hasDD = { value: false };
      editor.getListItemState(mixedObj, hasLI, hasDT, hasDD);
      if (mixedObj.value)
        return "mixed";
      if (hasLI.value)
        return "li";
      if (hasDT.value)
        return "dt";
      if (hasDD.value)
        return "dd";
    }
  } catch (e) {}

  // return "noList" if we aren't in a list at all
  return "noList";
}

function InitListMenu()
{
  if (!IsHTMLEditor())
    return;

  var IDSuffix = GetListStateString();

  // Set enable state for the "None" menuitem
  goSetCommandEnabled("cmd_removeList", IDSuffix != "noList");

  // Set "radio" check on one item, but...
  // we won't find a match if it's "mixed"
  var menuItem = document.getElementById("menu_"+IDSuffix);
  if (menuItem)
    menuItem.setAttribute("checked", "true");
}

function GetAlignmentString()
{
  var mixedObj = { value: null };
  var alignObj = { value: null };
  try {
    GetCurrentEditor().getAlignment(mixedObj, alignObj);
  } catch (e) {}

  if (mixedObj.value)
    return "mixed";
  if (alignObj.value == nsIHTMLEditor.eLeft)
    return "left";
  if (alignObj.value == nsIHTMLEditor.eCenter)
    return "center";
  if (alignObj.value == nsIHTMLEditor.eRight)
    return "right";
  if (alignObj.value == nsIHTMLEditor.eJustify)
    return "justify";

  // return "left" if we got here
  return "left";
}

function InitAlignMenu()
{
  if (!IsHTMLEditor())
    return;

  var IDSuffix = GetAlignmentString();

  // we won't find a match if it's "mixed"
  var menuItem = document.getElementById("menu_"+IDSuffix);
  if (menuItem)
    menuItem.setAttribute("checked", "true");
}

function EditorSetDefaultPrefsAndDoctype()
{
  var editor = GetCurrentEditor();

  var domdoc;
  try { 
    domdoc = editor.document;
  } catch (e) { dump( e + "\n"); }
  if ( !domdoc )
  {
    dump("EditorSetDefaultPrefsAndDoctype: EDITOR DOCUMENT NOT FOUND\n");
    return;
  }

  // Insert a doctype element 
  // if it is missing from existing doc
  if (!domdoc.doctype)
  {
    var newdoctype = domdoc.implementation.createDocumentType("HTML", "-//W3C//DTD HTML 4.01 Transitional//EN","");
    if (newdoctype)
      domdoc.insertBefore(newdoctype, domdoc.firstChild);
  }
  
  // search for head; we'll need this for meta tag additions
  var headelement = 0;
  var headnodelist = domdoc.getElementsByTagName("head");
  if (headnodelist)
  {
    var sz = headnodelist.length;
    if ( sz >= 1 )
      headelement = headnodelist.item(0);
  }
  else
  {
    headelement = domdoc.createElement("head");
    if (headelement)
      domdoc.insertAfter(headelement, domdoc.firstChild);
  }

  /* only set default prefs for new documents */
  if (!IsUrlAboutBlank(GetDocumentUrl()))
    return;

  // search for author meta tag.
  // if one is found, don't do anything.
  // if not, create one and make it a child of the head tag
  //   and set its content attribute to the value of the editor.author preference.

  var nodelist = domdoc.getElementsByTagName("meta");
  if ( nodelist )
  {
    // we should do charset first since we need to have charset before
    // hitting other 8-bit char in other meta tags
    // grab charset pref and make it the default charset
    var element;
    var prefCharsetString = 0;
    try
    {
      prefCharsetString = gPrefs.getComplexValue("intl.charset.default",
                                                 Components.interfaces.nsIPrefLocalizedString).data;
    }
    catch (ex) {}
    if ( prefCharsetString && prefCharsetString != 0)
    {
        element = domdoc.createElement("meta");
        if ( element )
        {
          element.setAttribute("http-equiv", "content-type");
          element.setAttribute("content", "text/html; charset=" + prefCharsetString);
          headelement.insertBefore( element, headelement.firstChild );
        }
    }

    var node = 0;
    var listlength = nodelist.length;

    // let's start by assuming we have an author in case we don't have the pref
    var authorFound = false;
    for (var i = 0; i < listlength && !authorFound; i++)
    {
      node = nodelist.item(i);
      if ( node )
      {
        var value = node.getAttribute("name");
        if (value && value.toLowerCase() == "author")
        {
          authorFound = true;
        }
      }
    }

    var prefAuthorString = 0;
    try
    {
      prefAuthorString = gPrefs.getComplexValue("editor.author",
                                                Components.interfaces.nsISupportsString).data;
    }
    catch (ex) {}
    if ( prefAuthorString && prefAuthorString != 0)
    {
      if ( !authorFound && headelement)
      {
        /* create meta tag with 2 attributes */
        element = domdoc.createElement("meta");
        if ( element )
        {
          element.setAttribute("name", "author");
          element.setAttribute("content", prefAuthorString);
          headelement.appendChild( element );
        }
      }
    }
  }

  // add title tag if not present
  var titlenodelist = editor.document.getElementsByTagName("title");
  if (headelement && titlenodelist && titlenodelist.length == 0)
  {
     titleElement = domdoc.createElement("title");
     if (titleElement)
       headelement.appendChild(titleElement);
  }

  // Get editor color prefs
  var use_custom_colors = false;
  try {
    use_custom_colors = gPrefs.getBoolPref("editor.use_custom_colors");
  }
  catch (ex) {}

  // find body node
  var bodyelement = GetBodyElement();
  if (bodyelement)
  {
    if ( use_custom_colors )
    {
      // try to get the default color values.  ignore them if we don't have them.
      var text_color;
      var link_color;
      var active_link_color;
      var followed_link_color;
      var background_color;

      try { text_color = gPrefs.getCharPref("editor.text_color"); } catch (e) {}
      try { link_color = gPrefs.getCharPref("editor.link_color"); } catch (e) {}
      try { active_link_color = gPrefs.getCharPref("editor.active_link_color"); } catch (e) {}
      try { followed_link_color = gPrefs.getCharPref("editor.followed_link_color"); } catch (e) {}
      try { background_color = gPrefs.getCharPref("editor.background_color"); } catch(e) {}

      // add the color attributes to the body tag.
      // and use them for the default text and background colors if not empty
      try {
        if (text_color)
        {
          editor.setAttributeOrEquivalent(bodyelement, "text", text_color, true);
          gDefaultTextColor = text_color;
        }
        if (background_color)
        {
          editor.setAttributeOrEquivalent(bodyelement, "bgcolor", background_color, true);
          gDefaultBackgroundColor = background_color
        }

        if (link_color)
          bodyelement.setAttribute("link", link_color);
        if (active_link_color)
          bodyelement.setAttribute("alink", active_link_color);
        if (followed_link_color)
          bodyelement.setAttribute("vlink", followed_link_color);
      } catch (e) {}
    }
    // Default image is independent of Custom colors???
    try {
      var background_image = gPrefs.getCharPref("editor.default_background_image");
      if (background_image)
        editor.setAttributeOrEquivalent(bodyelement, "background", background_image, true);
    } catch (e) {dump("BACKGROUND EXCEPTION: "+e+"\n"); }

  }
  // auto-save???
}

function GetBodyElement()
{
  try {
    return GetCurrentEditor().rootElement;
  }
  catch (ex) {
    dump("no body tag found?!\n");
    //  better have one, how can we blow things up here?
  }
  return null;
}

// --------------------------- Logging stuff ---------------------------

function EditorGetNodeFromOffsets(offsets)
{
  var node = null;
  try {
    node = GetCurrentEditor().document;

    for (var i = 0; i < offsets.length; i++)
      node = node.childNodes[offsets[i]];
  } catch (e) {}
  return node;
}

function EditorSetSelectionFromOffsets(selRanges)
{
  try {
    var editor = GetCurrentEditor();
    var selection = editor.selection;
    selection.removeAllRanges();

    var rangeArr, start, end, node, offset;
    for (var i = 0; i < selRanges.length; i++)
    {
      rangeArr = selRanges[i];
      start    = rangeArr[0];
      end      = rangeArr[1];

      var range = editor.document.createRange();

      node   = EditorGetNodeFromOffsets(start[0]);
      offset = start[1];

      range.setStart(node, offset);

      node   = EditorGetNodeFromOffsets(end[0]);
      offset = end[1];

      range.setEnd(node, offset);

      selection.addRange(range);
    }
  } catch (e) {}
}

//--------------------------------------------------------------------
function initFontStyleMenu(menuPopup)
{
  for (var i = 0; i < menuPopup.childNodes.length; i++)
  {
    var menuItem = menuPopup.childNodes[i];
    var theStyle = menuItem.getAttribute("state");
    if (theStyle)
    {
      menuItem.setAttribute("checked", theStyle);
    }
  }
}

//--------------------------------------------------------------------
function onButtonUpdate(button, commmandID)
{
  var commandNode = document.getElementById(commmandID);
  var state = commandNode.getAttribute("state");
  button.checked = state == "true";
}

//--------------------------------------------------------------------
function onStateButtonUpdate(button, commmandID, onState)
{
  var commandNode = document.getElementById(commmandID);
  var state = commandNode.getAttribute("state");

  button.checked = state == onState;
}

// --------------------------- Status calls ---------------------------
function getColorAndSetColorWell(ColorPickerID, ColorWellID)
{
  var colorWell;
  if (ColorWellID)
    colorWell = document.getElementById(ColorWellID);

  var colorPicker = document.getElementById(ColorPickerID);
  if (colorPicker)
  {
    // Extract color from colorPicker and assign to colorWell.
    var color = colorPicker.getAttribute("color");

    if (colorWell && color)
    {
      // Use setAttribute so colorwell can be a XUL element, such as button
      colorWell.setAttribute("style", "background-color: " + color);
    }
  }
  return color;
}

//-----------------------------------------------------------------------------------
function IsSpellCheckerInstalled()
{
  return "@mozilla.org/spellchecker;1" in Components.classes;
}

//-----------------------------------------------------------------------------------
function IsFindInstalled()
{
  return "@mozilla.org/embedcomp/rangefind;1" in Components.classes
          && "@mozilla.org/find/find_service;1" in Components.classes;
}

//-----------------------------------------------------------------------------------
function RemoveInapplicableUIElements()
{
  // For items that are in their own menu block, remove associated separator
  // (we can't use "hidden" since class="hide-in-IM" CSS rule interferes)

   // if no find, remove find ui
  if (!IsFindInstalled())
  {
    HideItem("menu_find");
    HideItem("menu_findnext");
    HideItem("menu_replace");
    HideItem("menu_find");
    RemoveItem("sep_find");
  }

   // if no spell checker, remove spell checker ui
  if (!IsSpellCheckerInstalled())
  {
    HideItem("spellingButton");
    HideItem("menu_checkspelling");
    RemoveItem("sep_checkspelling");
  }
  else
  {
    SetElementEnabled(document.getElementById("menu_checkspelling"), true);
    SetElementEnabled(document.getElementById("spellingButton"), true);
    SetElementEnabled(document.getElementById("checkspellingkb"), true);
  }

  // Remove menu items (from overlay shared with HTML editor) in non-HTML.
  if (!IsHTMLEditor())
  {
    HideItem("insertAnchor");
    HideItem("insertImage");
    HideItem("insertHline");
    HideItem("insertTable");
    HideItem("insertHTML");
    HideItem("insertFormMenu");
    HideItem("fileExportToText");
    HideItem("viewFormatToolbar");
    HideItem("viewEditModeToolbar");
  }
}

function HideItem(id)
{
  var item = document.getElementById(id);
  if (item)
    item.hidden = true;
}

function RemoveItem(id)
{
  var item = document.getElementById(id);
  if (item)
    item.parentNode.removeChild(item);
}

// Command Updating Strategy:
//   Don't update on on selection change, only when menu is displayed,
//   with this "oncreate" hander:
function EditorInitTableMenu()
{
  try {
    InitJoinCellMenuitem("menu_JoinTableCells");
  } catch (ex) {}

  // Set enable states for all table commands
  goUpdateTableMenuItems(document.getElementById("composerTableMenuItems"));
}

function InitJoinCellMenuitem(id)
{
  // Change text on the "Join..." item depending if we
  //   are joining selected cells or just cell to right
  // TODO: What to do about normal selection that crosses
  //       table border? Try to figure out all cells
  //       included in the selection?
  var menuText;
  var menuItem = document.getElementById(id);
  if (!menuItem) return;

  // Use "Join selected cells if there's more than 1 cell selected
  var numSelected;
  var foundElement;
  
  try {
    var tagNameObj = {};
    var countObj = {value:0}
    foundElement = GetCurrentTableEditor().getSelectedOrParentTableElement(tagNameObj, countObj);
    numSelected = countObj.value
  }
  catch(e) {}
  if (foundElement && numSelected > 1)
    menuText = GetString("JoinSelectedCells");
  else
    menuText = GetString("JoinCellToRight");

  menuItem.setAttribute("label",menuText);
  menuItem.setAttribute("accesskey",GetString("JoinCellAccesskey"));
}

function InitRemoveStylesMenuitems(removeStylesId, removeLinksId, removeNamedAnchorsId)
{
  var editor = GetCurrentEditor();
  if (!editor)
    return;

  // Change wording of menuitems depending on selection
  var stylesItem = document.getElementById(removeStylesId);
  var linkItem = document.getElementById(removeLinksId);

  var isCollapsed = editor.selection.isCollapsed;
  if (stylesItem)
  {
    stylesItem.setAttribute("label", isCollapsed ? GetString("StopTextStyles") : GetString("RemoveTextStyles"));
    stylesItem.setAttribute("accesskey", GetString("RemoveTextStylesAccesskey"));
  }
  if (linkItem)
  {
    linkItem.setAttribute("label", isCollapsed ? GetString("StopLinks") : GetString("RemoveLinks"));
    linkItem.setAttribute("accesskey", GetString("RemoveLinksAccesskey"));
    // Note: disabling text style is a pain since there are so many - forget it!

    // Disable if not in a link, but always allow "Remove"
    //  if selection isn't collapsed since we only look at anchor node
    try {
      SetElementEnabled(linkItem, !isCollapsed ||
                      editor.getElementOrParentByTagName("href", null));
    } catch(e) {}      
  }
  // Disable if selection is collapsed
  SetElementEnabledById(removeNamedAnchorsId, !isCollapsed);
}

function goUpdateTableMenuItems(commandset)
{
  var editor = GetCurrentTableEditor();
  if (!editor)
  {
    dump("goUpdateTableMenuItems: too early, not initialized\n");
    return;
  }

  var enabled = false;
  var enabledIfTable = false;

  var flags = editor.flags;
  if (!(flags & nsIPlaintextEditor.eEditorReadonlyMask) &&
      IsEditingRenderedHTML())
  {
    var tagNameObj = { value: "" };
    var element;
    try {
      element = editor.getSelectedOrParentTableElement(tagNameObj, {value:0});
    }
    catch(e) {}

    if (element)
    {
      // Value when we need to have a selected table or inside a table
      enabledIfTable = true;

      // All others require being inside a cell or selected cell
      enabled = (tagNameObj.value == "td");
    }
  }

  // Loop through command nodes
  for (var i = 0; i < commandset.childNodes.length; i++)
  {
    var commandID = commandset.childNodes[i].getAttribute("id");
    if (commandID)
    {
      if (commandID == "cmd_InsertTable" ||
          commandID == "cmd_JoinTableCells" ||
          commandID == "cmd_SplitTableCell" ||
          commandID == "cmd_ConvertToTable")
      {
        // Call the update method in the command class
        goUpdateCommand(commandID);
      }
      // Directly set with the values calculated here
      else if (commandID == "cmd_DeleteTable" ||
               commandID == "cmd_NormalizeTable" ||
               commandID == "cmd_editTable" ||
               commandID == "cmd_TableOrCellColor" ||
               commandID == "cmd_SelectTable")
      {
        goSetCommandEnabled(commandID, enabledIfTable);
      } else {
        goSetCommandEnabled(commandID, enabled);
      }
    }
  }
}

//-----------------------------------------------------------------------------------
// Helpers for inserting and editing tables:

function IsInTable()
{
  var editor = GetCurrentEditor();
  try {
    var flags = editor.flags;
    return (IsHTMLEditor() &&
            !(flags & nsIPlaintextEditor.eEditorReadonlyMask) &&
            IsEditingRenderedHTML() &&
            null != editor.getElementOrParentByTagName("table", null));
  } catch (e) {}
  return false;
}

function IsInTableCell()
{
  try {
    var editor = GetCurrentEditor();
    var flags = editor.flags;
    return (IsHTMLEditor() &&
            !(flags & nsIPlaintextEditor.eEditorReadonlyMask) && 
            IsEditingRenderedHTML() &&
            null != editor.getElementOrParentByTagName("td", null));
  } catch (e) {}
  return false;

}

function IsSelectionInOneCell()
{
  try {
    var editor = GetCurrentEditor();
    var selection = editor.selection;

    if (selection.rangeCount == 1)
    {
      // We have a "normal" single-range selection
      if (!selection.isCollapsed &&
         selection.anchorNode != selection.focusNode)
      {
        // Check if both nodes are within the same cell
        var anchorCell = editor.getElementOrParentByTagName("td", selection.anchorNode);
        var focusCell = editor.getElementOrParentByTagName("td", selection.focusNode);
        return (focusCell != null && anchorCell != null && (focusCell == anchorCell));
      }
      // Collapsed selection or anchor == focus (thus must be in 1 cell)
      return true;
    }
  } catch (e) {}
  return false;
}

// Call this with insertAllowed = true to allow inserting if not in existing table,
//   else use false to do nothing if not in a table
function EditorInsertOrEditTable(insertAllowed)
{
  if (IsInTable())
  {
    // Edit properties of existing table
    window.openDialog("chrome://editor/content/EdTableProps.xul", "_blank", "chrome,close,titlebar,modal", "","TablePanel");
    gContentWindow.focus();
  } 
  else if (insertAllowed)
  {
    try {
      if (GetCurrentEditor().selection.isCollapsed)
        // If we have a caret, insert a blank table...
        EditorInsertTable();
      else
        // else convert the selection into a table
        goDoCommand("cmd_ConvertToTable");
    } catch (e) {}
  }
}

function EditorInsertTable()
{
  // Insert a new table
  window.openDialog("chrome://editor/content/EdInsertTable.xul", "_blank", "chrome,close,titlebar,modal", "");
  gContentWindow.focus();
}

function EditorTableCellProperties()
{
  if (!IsHTMLEditor())
    return;

  try {
    var cell = GetCurrentEditor().getElementOrParentByTagName("td", null);
    if (cell) {
      // Start Table Properties dialog on the "Cell" panel
      window.openDialog("chrome://editor/content/EdTableProps.xul", "_blank", "chrome,close,titlebar,modal", "", "CellPanel");
      gContentWindow.focus();
    }
  } catch (e) {}
}

function GetNumberOfContiguousSelectedRows()
{
  if (!IsHTMLEditor())
    return 0;

  var rows = 0;
  try {
    var editor = GetCurrentTableEditor();
    var rowObj = { value: 0 };
    var colObj = { value: 0 };
    var cell = editor.getFirstSelectedCellInTable(rowObj, colObj);
    if (!cell)
      return 0;

    // We have at least one row
    rows++;

    var lastIndex = rowObj.value;
    do {
      cell = editor.getNextSelectedCell({value:0});
      if (cell)
      {
        editor.getCellIndexes(cell, rowObj, colObj);
        var index = rowObj.value;
        if (index == lastIndex + 1)
        {
          lastIndex = index;
          rows++;
        }
      }
    }
    while (cell);
  } catch (e) {}

  return rows;
}

function GetNumberOfContiguousSelectedColumns()
{
  if (!IsHTMLEditor())
    return 0;

  var columns = 0;
  try {
    var editor = GetCurrentTableEditor();
    var colObj = { value: 0 };
    var rowObj = { value: 0 };
    var cell = editor.getFirstSelectedCellInTable(rowObj, colObj);
    if (!cell)
      return 0;

    // We have at least one column
    columns++;

    var lastIndex = colObj.value;
    do {
      cell = editor.getNextSelectedCell({value:0});
      if (cell)
      {
        editor.getCellIndexes(cell, rowObj, colObj);
        var index = colObj.value;
        if (index == lastIndex +1)
        {
          lastIndex = index;
          columns++;
        }
      }
    }
    while (cell);
  } catch (e) {}

  return columns;
}

function EditorOnFocus()
{
  // Current window already has the InsertCharWindow
  if ("InsertCharWindow" in window && window.InsertCharWindow) return;

  // Find window with an InsertCharsWindow and switch association to this one
  var windowWithDialog = FindEditorWithInsertCharDialog();
  if (windowWithDialog)
  {
    // Switch the dialog to current window
    // this sets focus to dialog, so bring focus back to editor window
    if (SwitchInsertCharToThisWindow(windowWithDialog))
      top.document.commandDispatcher.focusedWindow.focus();
  }
}

function SwitchInsertCharToThisWindow(windowWithDialog)
{
  if (windowWithDialog && "InsertCharWindow" in windowWithDialog &&
      windowWithDialog.InsertCharWindow)
  {
    // Move dialog association to the current window
    window.InsertCharWindow = windowWithDialog.InsertCharWindow;
    windowWithDialog.InsertCharWindow = null;

    // Switch the dialog's opener to current window's
    window.InsertCharWindow.opener = window;

    // Bring dialog to the forground
    window.InsertCharWindow.focus();
    return true;
  }
  return false;
}

function FindEditorWithInsertCharDialog()
{
  try {
    // Find window with an InsertCharsWindow and switch association to this one
    var windowManager = Components.classes['@mozilla.org/appshell/window-mediator;1'].getService();
    var windowManagerInterface = windowManager.QueryInterface( Components.interfaces.nsIWindowMediator);
    var enumerator = windowManagerInterface.getEnumerator( null );

    while ( enumerator.hasMoreElements()  )
    {
      var tempWindow = enumerator.getNext();

      if (tempWindow != window && "InsertCharWindow" in tempWindow &&
          tempWindow.InsertCharWindow)
      {
        return tempWindow;
      }
    }
  }
  catch(e) {}
  return null;
}

function EditorFindOrCreateInsertCharWindow()
{
  if ("InsertCharWindow" in window && window.InsertCharWindow)
    window.InsertCharWindow.focus();
  else
  {
    // Since we switch the dialog during EditorOnFocus(),
    //   this should really never be found, but it's good to be sure
    var windowWithDialog = FindEditorWithInsertCharDialog();
    if (windowWithDialog)
    {
      SwitchInsertCharToThisWindow(windowWithDialog);
    }
    else
    {
      // The dialog will set window.InsertCharWindow to itself
      window.openDialog("chrome://editor/content/EdInsertChars.xul", "_blank", "chrome,close,titlebar", "");
    }
  }
}

// Find another HTML editor window to associate with the InsertChar dialog
//   or close it if none found  (May be a mail composer)
function SwitchInsertCharToAnotherEditorOrClose()
{
  if ("InsertCharWindow" in window && window.InsertCharWindow)
  {
    var windowManager = Components.classes['@mozilla.org/appshell/window-mediator;1'].getService();
    var enumerator;
    try {
      var windowManagerInterface = windowManager.QueryInterface( Components.interfaces.nsIWindowMediator);
      enumerator = windowManagerInterface.getEnumerator( null );
    }
    catch(e) {}
    if (!enumerator) return;

    // TODO: Fix this to search for command controllers and look for "cmd_InsertChars"
    // For now, detect just Web Composer and HTML Mail Composer
    while ( enumerator.hasMoreElements()  )
    {
      var  tempWindow = enumerator.getNext();
      if (tempWindow != window && tempWindow != window.InsertCharWindow &&
          "GetCurrentEditor" in tempWindow && tmpWindow.GetCurrentEditor())
      {
        tempWindow.InsertCharWindow = window.InsertCharWindow;
        window.InsertCharWindow = null;
        tempWindow.InsertCharWindow.opener = tempWindow;
        return;
      }
    }
    // Didn't find another editor - close the dialog
    window.InsertCharWindow.close();
  }
}

function ResetStructToolbar()
{
  gLastFocusNode = null;
  UpdateStructToolbar();
}

function newCommandListener(element)
{
  return function() { return SelectFocusNodeAncestor(element); };
}

function newContextmenuListener(button, element)
{
  return function() { return InitStructBarContextMenu(button, element); };
}

function UpdateStructToolbar()
{
  var editor = GetCurrentEditor();
  if (!editor) return;

  var mixed = GetSelectionContainer();
  if (!mixed) return;
  var element = mixed.node;
  var oneElementSelected = mixed.oneElementSelected;

  if (!element) return;

  if (element == gLastFocusNode &&
      oneElementSelected == gLastFocusNodeWasSelected)
    return;

  gLastFocusNode = element;
  gLastFocusNodeWasSelected = mixed.oneElementSelected;

  var toolbar = document.getElementById("structToolbar");
  if (!toolbar) return;
  var childNodes = toolbar.childNodes;
  var childNodesLength = childNodes.length;
  // We need to leave the <label> to flex the buttons to the left
  // so, don't remove the last child at position length - 1
  while (childNodes.length > 1) {
    // Remove back to front so there's less moving about.
    toolbar.removeChild(childNodes.item(childNodes.length - 2));
  }

  toolbar.removeAttribute("label");

  if ( IsInHTMLSourceMode() ) {
    // we have destroyed the contents of the status bar and are
    // about to recreate it ; but we don't want to do that in
    // Source mode
    return;
  }

  var tag, button;
  var bodyElement = GetBodyElement();
  var isFocusNode = true;
  var tmp;
  do {
    tag = element.nodeName.toLowerCase();

    button = document.createElementNS(XUL_NS, "toolbarbutton");
    button.setAttribute("label",   "<" + tag + ">");
    button.setAttribute("value",   tag);
    button.setAttribute("context", "structToolbarContext");
    button.className = "struct-button";

    toolbar.insertBefore(button, toolbar.firstChild);

    button.addEventListener("command", newCommandListener(element), false);

    button.addEventListener("contextmenu", newContextmenuListener(button, element), false);

    if (isFocusNode && oneElementSelected) {
      button.setAttribute("checked", "true");
      isFocusNode = false;
    }

    tmp = element;
    element = element.parentNode;

  } while (tmp != bodyElement);
}

function SelectFocusNodeAncestor(element)
{
  var editor = GetCurrentEditor();
  if (editor) {
    if (element == GetBodyElement())
      editor.selectAll();
    else
      editor.selectElement(element);
  }
  ResetStructToolbar();
}

function GetSelectionContainer()
{
  var editor = GetCurrentEditor();
  if (!editor) return null;

  try {
    var selection = editor.selection;
    if (!selection) return null;
  }
  catch (e) { return null; }

  var result = { oneElementSelected:false };

  if (selection.isCollapsed) {
    result.node = selection.focusNode;
  }
  else {
    var rangeCount = selection.rangeCount;
    if (rangeCount == 1) {
      result.node = editor.getSelectedElement("");
      var range = selection.getRangeAt(0);

      // check for a weird case : when we select a piece of text inside
      // a text node and apply an inline style to it, the selection starts
      // at the end of the text node preceding the style and ends after the
      // last char of the style. Assume the style element is selected for
      // user's pleasure
      if (!result.node &&
          range.startContainer.nodeType == Node.TEXT_NODE &&
          range.startOffset == range.startContainer.length &&
          range.endContainer.nodeType == Node.TEXT_NODE &&
          range.endOffset == range.endContainer.length &&
          range.endContainer.nextSibling == null &&
          range.startContainer.nextSibling == range.endContainer.parentNode)
        result.node = range.endContainer.parentNode;

      if (!result.node) {
        // let's rely on the common ancestor of the selection
        result.node = range.commonAncestorContainer;
      }
      else {
        result.oneElementSelected = true;
      }
    }
    else {
      // assume table cells !
      var i, container = null;
      for (i = 0; i < rangeCount; i++) {
        range = selection.getRangeAt(i);
        if (!container) {
          container = range.startContainer;
        }
        else if (container != range.startContainer) {
          // all table cells don't belong to same row so let's
          // select the parent of all rows
          result.node = container.parentNode;
          break;
        }
        result.node = container;
      }
    }
  }

  // make sure we have an element here
  while (result.node.nodeType != Node.ELEMENT_NODE)
    result.node = result.node.parentNode;

  // and make sure the element is not a special editor node like
  // the <br> we insert in blank lines
  // and don't select anonymous content !!! (fix for bug 190279)
  while (result.node.hasAttribute("_moz_editor_bogus_node") ||
         editor.isAnonymousElement(result.node))
    result.node = result.node.parentNode;

  return result;
}

function FillInHTMLTooltip(tooltip)
{
  const XLinkNS = "http://www.w3.org/1999/xlink";
  var tooltipText = null;
  var node;
  if (gEditorDisplayMode == kDisplayModePreview) {
    for (node = document.tooltipNode; node; node = node.parentNode) {
      if (node.nodeType == Node.ELEMENT_NODE) {
        tooltipText = node.getAttributeNS(XLinkNS, "title");
        if (tooltipText && /\S/.test(tooltipText)) {
          tooltip.setAttribute("label", tooltipText);
          return true;
        }
        tooltipText = node.getAttribute("title");
        if (tooltipText && /\S/.test(tooltipText)) {
          tooltip.setAttribute("label", tooltipText);
          return true;
        }
      }
    }
  } else {
    for (node = document.tooltipNode; node; node = node.parentNode) {
      if (node instanceof Components.interfaces.nsIDOMHTMLImageElement ||
          node instanceof Components.interfaces.nsIDOMHTMLInputElement)
        tooltipText = node.getAttribute("src");
      else if (node instanceof Components.interfaces.nsIDOMHTMLAnchorElement)
        tooltipText = node.getAttribute("href") || node.name;
      if (tooltipText) {
        tooltip.setAttribute("label", tooltipText);
        return true;
      }
    }
  }
  return false;
}

function UpdateTOC()
{
  window.openDialog("chrome://editor/content/EdInsertTOC.xul",
                    "_blank", "chrome,close,modal,titlebar");
  window.content.focus();
}

function InitTOCMenu()
{
  var elt = GetCurrentEditor().document.getElementById("mozToc");
  var createMenuitem = document.getElementById("insertTOCMenuitem");
  var updateMenuitem = document.getElementById("updateTOCMenuitem");
  var removeMenuitem = document.getElementById("removeTOCMenuitem");
  if (removeMenuitem && createMenuitem && updateMenuitem) {
    if (elt) {
      createMenuitem.setAttribute("disabled", "true");
      updateMenuitem.removeAttribute("disabled");
      removeMenuitem.removeAttribute("disabled");
    }
    else {
      createMenuitem.removeAttribute("disabled");
      removeMenuitem.setAttribute("disabled", "true");
      updateMenuitem.setAttribute("disabled", "true");
    }
  }
}

function RemoveTOC()
{
  var theDocument = GetCurrentEditor().document;
  var elt = theDocument.getElementById("mozToc");
  if (elt) {
    elt.parentNode.removeChild(elt);
  }

  function acceptNode(node)
  {
    if (node.nodeName.toLowerCase() == "a" &&
        node.hasAttribute("name") &&
        node.getAttribute("name").substr(0, 8) == "mozTocId") {
      return NodeFilter.FILTER_ACCEPT;
    }
    return NodeFilter.FILTER_SKIP;
  }

  var treeWalker = theDocument.createTreeWalker(theDocument.documentElement,
                                                NodeFilter.SHOW_ELEMENT,
                                                acceptNode,
                                                true);
  if (treeWalker) {
    var anchorNode = treeWalker.nextNode();
    while (anchorNode) {
      var tmp = treeWalker.nextNode();
      anchorNode.parentNode.removeChild(anchorNode);
      anchorNode = tmp;
    }
  }
}