/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* ***** 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
 * the Initial Developer. All Rights Reserved.
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 * Contributor(s):
 *   Original Author: David W. Hyatt (hyatt@netscape.com)
 *
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 * either of the GNU General Public License Version 2 or later (the "GPL"),
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/*

   This is the focus manager for XUL documents.

*/

#ifndef nsXULCommandDispatcher_h__
#define nsXULCommandDispatcher_h__

#include "nsCOMPtr.h"
#include "nsIDOMXULCommandDispatcher.h"
#include "nsWeakReference.h"
#include "nsIDOMNode.h"
#include "nsString.h"
#include "nsCycleCollectionParticipant.h"

class nsIDOMElement;
class nsPIWindowRoot;

class nsXULCommandDispatcher : public nsIDOMXULCommandDispatcher,
                               public nsSupportsWeakReference
{
public:
    nsXULCommandDispatcher(nsIDocument* aDocument);
    virtual ~nsXULCommandDispatcher();

    // nsISupports
    NS_DECL_CYCLE_COLLECTING_ISUPPORTS
    NS_DECL_CYCLE_COLLECTION_CLASS_AMBIGUOUS(nsXULCommandDispatcher,
                                             nsIDOMXULCommandDispatcher)

    // nsIDOMXULCommandDispatcher interface
    NS_DECL_NSIDOMXULCOMMANDDISPATCHER

    void Disconnect();
protected:
    already_AddRefed<nsPIWindowRoot> GetWindowRoot();

    nsIContent* GetRootFocusedContentAndWindow(nsPIDOMWindow** aWindow);

    nsCOMPtr<nsIDocument> mDocument;

    class Updater {
    public:
      Updater(nsIDOMElement* aElement,
              const nsAString& aEvents,
              const nsAString& aTargets)
          : mElement(aElement),
            mEvents(aEvents),
            mTargets(aTargets),
            mNext(nsnull)
      {}

      nsCOMPtr<nsIDOMElement> mElement;
      nsString                mEvents;
      nsString                mTargets;
      Updater*                mNext;
    };

    Updater* mUpdaters;

    bool Matches(const nsString& aList, 
                   const nsAString& aElement);
};

#endif // nsXULCommandDispatcher_h__
