/* -*- Mode: C++; tab-width: 2; 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 support for icons in native menu items on Mac OS X.
 *
 * The Initial Developer of the Original Code is Google Inc.
 * Portions created by the Initial Developer are Copyright (C) 2006
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *  Mark Mentovai <mark@moxienet.com> (Original Author)
 *  Josh Aas <josh@mozilla.com>
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

/*
 * Retrieves and displays icons in native menu items on Mac OS X.
 */

#ifndef nsMenuItemIconX_h_
#define nsMenuItemIconX_h_

#include "nsCOMPtr.h"
#include "imgIDecoderObserver.h"

class nsIURI;
class nsIContent;
class imgIRequest;
class nsMenuObjectX;

#import <Cocoa/Cocoa.h>

class nsMenuItemIconX : public imgIDecoderObserver
{
public:
  nsMenuItemIconX(nsMenuObjectX* aMenuItem,
                  nsIContent*    aContent,
                  NSMenuItem*    aNativeMenuItem);
private:
  virtual ~nsMenuItemIconX();

public:
  NS_DECL_ISUPPORTS
  NS_DECL_IMGICONTAINEROBSERVER
  NS_DECL_IMGIDECODEROBSERVER

  // SetupIcon succeeds if it was able to set up the icon, or if there should
  // be no icon, in which case it clears any existing icon but still succeeds.
  nsresult SetupIcon();

  // GetIconURI fails if the item should not have any icon.
  nsresult GetIconURI(nsIURI** aIconURI);

  // LoadIcon will set a placeholder image and start a load request for the
  // icon.  The request may not complete until after LoadIcon returns.
  nsresult LoadIcon(nsIURI* aIconURI);

  // Unless we take precautions, we may outlive the object that created us
  // (mMenuObject, which owns our native menu item (mNativeMenuItem)).
  // Destroy() should be called from mMenuObject's destructor to prevent
  // this from happening.  See bug 499600.
  void Destroy();

protected:
  nsCOMPtr<nsIContent>  mContent;
  nsCOMPtr<imgIRequest> mIconRequest;
  nsMenuObjectX*        mMenuObject; // [weak]
  nsIntRect             mImageRegionRect;
  bool                  mLoadedIcon;
  bool                  mSetIcon;
  NSMenuItem*           mNativeMenuItem; // [weak]
};

#endif // nsMenuItemIconX_h_