/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
 * Version: NPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Netscape 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/NPL/
 *
 * 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 Communicator client code.
 *
 * The Initial Developer of the Original Code is 
 * Netscape Communications Corporation.
 * Portions created by the Initial Developer are Copyright (C) 1998
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 * Original Author: David W. Hyatt (hyatt@netscape.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 NPL, 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 NPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

#include "nsCOMPtr.h"
#include "nsIXBLPrototypeBinding.h"
#include "nsICSSLoaderObserver.h"
#include "nsISupportsArray.h"

class nsIContent;
class nsIAtom;
class nsIDocument;
class nsIScriptContext;
class nsSupportsHashtable;
class nsXBLPrototypeResources;

// *********************************************************************/
// The XBLResourceLoader class

MOZ_DECL_CTOR_COUNTER(nsXBLResource);

struct nsXBLResource {
  nsXBLResource* mNext;
  nsIAtom* mType;
  nsString mSrc;

  nsXBLResource(nsIAtom* aType, const nsAReadableString& aSrc) {
    MOZ_COUNT_CTOR(nsXBLResource);
    mNext = nsnull;
    mType = aType;
    mSrc = aSrc;
  }

  ~nsXBLResource() { 
    MOZ_COUNT_DTOR(nsXBLResource);  
    delete mNext; 
  }
};

class nsXBLResourceLoader : public nsICSSLoaderObserver
{
public:
  NS_DECL_ISUPPORTS

  // nsICSSLoaderObserver
  NS_IMETHOD StyleSheetLoaded(nsICSSStyleSheet* aSheet, PRBool aNotify);

  void LoadResources(PRBool* aResult);
  void AddResource(nsIAtom* aResourceType, const nsAReadableString& aSrc);
  void AddResourceListener(nsIContent* aElement);

  nsXBLResourceLoader(nsIXBLPrototypeBinding* aBinding, nsXBLPrototypeResources* aResources);
  virtual ~nsXBLResourceLoader();

  void NotifyBoundElements();

// MEMBER VARIABLES
  nsIXBLPrototypeBinding* mBinding; // A pointer back to our binding.
  nsXBLPrototypeResources* mResources; // A pointer back to our resources information.
  
  nsXBLResource* mResourceList; // The list of resources we need to load.
  nsXBLResource* mLastResource;

  PRPackedBool mLoadingResources;
  PRPackedBool mInLoadResourcesFunc;
  PRInt16 mPendingSheets; // The number of stylesheets that have yet to load.
  
  nsCOMPtr<nsISupportsArray> mBoundElements; // Bound elements that are waiting on the stylesheets and scripts.
};