/*

* 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 "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: smilparser  declaration

*

*/

#ifndef SMILPARSER_H

#define SMILPARSER_H

#include <e32base.h>

#include <s32strm.h>

#include <gdi.h>

class CSmilTimeContainer;

class CSmilMedia;

class CSmilRegion;

class CSmilPresentation;

class CSmilAnchor;

class CSmilArea;

class CSmilTransition;

class CSmilObject;

class MSmilPlayer;

class CMDXMLDocument;

template <class T> class CLinkedList;

/**

 * SMIL2 semantical parser class

 */

class CSmilParser : public CBase

	{	

	public:

        /**

        * Parser phase one constructor

		* 

		* Takes the player interface object as a parameter. This interface 

		* is used by the parser for reporting parse errors and for getting values 

		* of the content control attributes. It is also passed to the created 

		* presentation object. 

        */

        IMPORT_C static CSmilParser* NewL(MSmilPlayer* aPlayer);

        /**

        * Destructor.

        */

        virtual ~CSmilParser();

		/**

		* Parses the given SMIL source, constructing the presentation object. 

		* The given base URL is used for resolving the URLs in the presentation. 

		* 

		* Verbose parse error messages are available through the MSmilPlayer interface.

		*/

		IMPORT_C CSmilPresentation* ParseL(const TDesC& aSmil, const TDesC& aBaseUrl);

		/**

		* Parses the given SMIL document, constructing the presentation object. 

		* The given base URL is used for resolving the URLs in the presentation. 

		*/

		IMPORT_C CSmilPresentation* ParseL(const CMDXMLDocument* aSmilDoc, const TDesC& aBaseUrl);

		/**

		* Parses a CSS2 style color value ("red", "green", "#ffcc44", ...)

		* The aTransparent flag is set if the parsing fails

		*/

		IMPORT_C 

		static TRgb ParseColor( const TDesC& aString, TBool& aTransparent );

		/**

		* Enables the layout scaling. This functionality shrinks the layout 

		* so that it fits the screensize while maintaining the original aspect

		* ratio. Images and other media is not scaled unless scaling is

		* is enabled by the fit attribute of the region element of the source

		* document.

		*/

		//inline void SetLayoutScalingEnabled(TBool aScale);

		IMPORT_C void SetMaxDownUpScaling( TReal32 aDown, TReal32 aUp );

	public:

		void BeginElementL(const TDesC& aName);

		void EndElementL(const TDesC& aName);

		void AttributeValueL(const TDesC& aName, const TDesC& aValue);

		void AttributesEndL(TInt aCount);

		TBool CheckSystemAttribute(const TDesC& aName, const TDesC& aValue);

	private:

		virtual void ConstructL(MSmilPlayer* aPlayer);

		void Init();

		void ParseTimeListL( const TDesC& aString, TBool aBegin );

		static TReal32 StringToRealValue( const TDesC& aString, TReal32 aDefault );

		static TInt StringToIntValue( const TDesC& aString, TInt aDefault );		

		enum TParseState 

			{

			EInitial, ESmil, EHead, ELayout, ELayoutFinished, EHeadFinished, EBody, EBodyFinished, ESmilFinished

			};

		CSmilParser();

		CSmilObject* iCurrent;		

		CSmilTimeContainer* iTimeContainer;

		CSmilRegion* iCurrentRegion;

		CSmilTransition* iCurrentTransition;

		CSmilAnchor* iAnchor;

		CSmilArea* iArea;

		TParseState iState;

		MSmilPlayer* iPlayer;

		CSmilPresentation* iPresentation;

		TPtrC iTag;

		struct Switch { TInt depth; TBool done; };

		CLinkedList<Switch>* iSwitchStack;

		TInt iDepth;

		TInt iIgnoreDepth;

		TBool iSkipContent;

		TBool iUnknownElement;

		struct Namespace { HBufC* name; HBufC* uri;};

		CLinkedList<Namespace>* iNamespaces;

		TPtrC iParamName;

		TPtrC iParamValue;

		TBool iScalingEnabled;

		TInt iTimegraphSize;

		TReal iDown;

		TReal iUp;

	};

#include <smilparser.inl>

#include <smilplayerinterface.h>

#endif