/*

* Copyright (c) 2003 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of the License "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description:  Applies CSS for the box tree

*

*/

#ifndef CCSSHANDLER_H

#define CCSSHANDLER_H

//  INCLUDES

#include <e32base.h>

#include "nw_css_processor.h"

#include "nw_lmgr_boxvisitor.h"

// CONSTANTS

// MACROS

// DATA TYPES

// FUNCTION PROTOTYPES

// FORWARD DECLARATIONS

// CLASS DECLARATION

/**

*  This class applies the CSS styles to the box tree. 

*  It breaks each box ApplyStyle into separate RunL

*

*  @lib css.lib

*  @since 2.1

*/

class CCSSHandler : public CActive

  {

   public:  // Constructors and destructor

     /**

      * Two-phased constructor.

      * @param aProcessor A pointer to processor object that owns this object

      * @return CCSSHandler*

	    */

      static CCSSHandler* NewL(NW_CSS_Processor_t* aProcessor);

      /**

      * Destructor.

      */

      virtual ~CCSSHandler();

    public: // New functions

      /**

      * This is called from the processor when a new stylesheet needs to be applied

      * @since 2.1

      * @return void

      */

      void ApplyStylesL();

    public: // Functions from base classes

      /**

      * From CActive 

      * @since 2.1

      * @param 

      * @return void

      */

      void RunL();

    private:

       /**

      * From CActive Noop. 

      * @since 2.1

      * @param 

      * @return void

      */

      void DoCancel();

     /**

      * C++ default constructor.

      * @param aProcessor A pointer to processor object that owns this object

      * @return CCSSHandler*

      */

      CCSSHandler(NW_CSS_Processor_t* aProcessor);

      /**

      * By default Symbian 2nd phase constructor is private.

      */

      void ConstructL();

      /**

      * This method applies styles to each box in the box tree and stores it as backup.

      * It is called from the RunL method.

      * @since 2.1

      * @return ETrue if styles have been applied to all the boxes, otherwise EFalse

      */

      TBool ApplyBoxStylesL();

      /**

      * After the styles have been applied, this method replace the property list of all boxes 

      * with the box backup property list, reformats the box tree and redraws it. Called from RunL

      * @since 2.1

      * @return void

      */

      void ApplyStylesCompleteL();

      /**

      * This method swaps the property list of all boxes with the box backup property list

      * @since 2.1

      * @return void

      */

      void SwapPropListL();

      /**

      * Gets the next box (using box visitor) which has the element node set up

      * @since 2.1

      * @param (OUT) element node which has been set on the box

      * @return pointer to the next box

      */

      NW_LMgr_Box_t* GetNextBox(NW_DOM_ElementNode_t** node);

    private:    // Data

      // box visitor to visit each box of the box tree to which styles are applied

      NW_LMgr_BoxVisitor_t iBoxVisitor;

      // processor whose styles need to be applied

      NW_CSS_Processor_t* iProcessor;

    };

#endif      // CCSSHandler

// End of CSS