Mozilla/mozilla/editor/ui/composer/content/editorApplicationOverlay.js

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/* Implementations of nsIControllerCommand for composer commands */

function initEditorContextMenuItems(aEvent)
{
  var shouldShowEditPage = !gContextMenu.onImage && !gContextMenu.onLink && !gContextMenu.onTextInput && !gContextMenu.inDirList;
  gContextMenu.showItem( "context-editpage", shouldShowEditPage );

  var shouldShowEditLink = gContextMenu.onSaveableLink; 
  gContextMenu.showItem( "context-editlink", shouldShowEditLink );

  // Hide the applications separator if there's no add-on apps present. 
  gContextMenu.showItem("context-sep-apps", gContextMenu.shouldShowSeparator("context-sep-apps"));
}
  
function initEditorContextMenuListener(aEvent)
{
  var popup = document.getElementById("contentAreaContextMenu");
  if (popup)
    popup.addEventListener("popupshowing", initEditorContextMenuItems, false);
}

addEventListener("load", initEditorContextMenuListener, false);

function editLink(aLinkURL)
{
  urlSecurityCheck(aLinkURL, window.document);  // XXX what is this? Why do we pass the chrome doc?
  editPage(aLinkURL, window, false);
}

function editDocument(aDocument)      
{
  if (!aDocument)
    aDocument = window._content.document;
  
  editPage(aDocument.URL, window, false); 
}

function editPageOrFrame()
{
  var url;
  var focusedWindow = document.commandDispatcher.focusedWindow;
  if (isDocumentFrame(focusedWindow))
    url = focusedWindow.location.href;
  else
    url = window._content.location.href;

  editPage(url, window, false)
}

// Any non-editor window wanting to create an editor with a URL
//   should use this instead of "window.openDialog..."
//  We must always find an existing window with requested URL
// (When calling from a dialog, "launchWindow" is dialog's "opener"
//   and we need a delay to let dialog close)
function editPage(url, launchWindow, delay)
{
  var focusedWindow = document.commandDispatcher.focusedWindow;
  if (isDocumentFrame(focusedWindow))
    url = focusedWindow.location.href;

  // User may not have supplied a window
  if (!launchWindow)
  {
    if (window)
    {
      launchWindow = window;
    }
    else
    {
      dump("No window to launch an editor from!\n");
      return;
    }
  }

  // if the current window is a browser window, then extract the current charset menu setting from the current 
  // document and use it to initialize the new composer window...

  var wintype = document.firstChild.getAttribute('windowtype');
  var charsetArg;

  if (launchWindow && (wintype == "navigator:browser") && launchWindow._content.document)
    charsetArg = "charset=" + launchWindow._content.document.characterSet;

  try {
    var windowManager = Components.classes['@mozilla.org/rdf/datasource;1?name=window-mediator'].getService();
    var windowManagerInterface = windowManager.QueryInterface( Components.interfaces.nsIWindowMediator);
    var enumerator = windowManagerInterface.getEnumerator( "composer:html" );
    while ( enumerator.hasMoreElements() )
    {
      var window = windowManagerInterface.convertISupportsToDOMWindow( enumerator.getNext() );
      if ( window && window.editorShell)
      {
        if (window.editorShell.checkOpenWindowForURLMatch(url, window))
        {
          // We found an editor with our url
          window.focus();
          return;
        }
      }
    }
    // Create new Composer window
    if (delay)
      launchWindow.delayedOpenWindow("chrome://editor/content", "chrome,all,dialog=no", url, charsetArg);
    else
      launchWindow.openDialog("chrome://editor/content", "_blank", "chrome,all,dialog=no", url, charsetArg);

  } catch(e) {}
}

// This used to be BrowserNewEditorWindow in navigator.js
function NewEditorWindow()
{
  // Open editor window with blank page
  // Kludge to leverage openDialog non-modal!
  window.openDialog( "chrome://editor/content", "_blank", "chrome,all,dialog=no", "about:blank");
}

function NewEditorFromTemplate()
{
  // XXX not implemented
}

function NewEditorFromDraft()
{
  // XXX not implemented
}