/* ***** 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 HTML Parser C++ Translator code.
 *
 * The Initial Developer of the Original Code is
 * Mozilla Foundation.
 * Portions created by the Initial Developer are Copyright (C) 2009
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Henri Sivonen <hsivonen@iki.fi>
 *
 * 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 ***** */

#ifndef nsHtml5TreeOpStage_h___
#define nsHtml5TreeOpStage_h___

#include "mozilla/Mutex.h"
#include "nsHtml5TreeOperation.h"
#include "nsTArray.h"
#include "nsAHtml5TreeOpSink.h"
#include "nsHtml5SpeculativeLoad.h"

class nsHtml5TreeOpStage : public nsAHtml5TreeOpSink {
  public:
  
    nsHtml5TreeOpStage();
    
    virtual ~nsHtml5TreeOpStage();
  
    /**
     * Flush the operations from the tree operations from the argument
     * queue unconditionally.
     */
    virtual void MoveOpsFrom(nsTArray<nsHtml5TreeOperation>& aOpQueue);
    
    /**
     * Retrieve the staged operations and speculative loads into the arguments.
     */
    void MoveOpsAndSpeculativeLoadsTo(nsTArray<nsHtml5TreeOperation>& aOpQueue,
        nsTArray<nsHtml5SpeculativeLoad>& aSpeculativeLoadQueue);

    /**
     * Move the speculative loads from the argument into the staging queue.
     */
    void MoveSpeculativeLoadsFrom(nsTArray<nsHtml5SpeculativeLoad>& aSpeculativeLoadQueue);

    /**
     * Retrieve the staged speculative loads into the argument.
     */
    void MoveSpeculativeLoadsTo(nsTArray<nsHtml5SpeculativeLoad>& aSpeculativeLoadQueue);

#ifdef DEBUG
    void AssertEmpty();
#endif

  private:
    nsTArray<nsHtml5TreeOperation> mOpQueue;
    nsTArray<nsHtml5SpeculativeLoad> mSpeculativeLoadQueue;
    mozilla::Mutex mMutex;
    
};

#endif /* nsHtml5TreeOpStage_h___ */