/*

* 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:  Parses CSS styles

*

*/

#ifndef TCSSParser_H

#define TCSSParser_H

//  INCLUDES

#include "nw_object_dynamic.h"

#include "CSSEventListener.h"

#include "CSSReader.h"

// CONSTANTS

// MACROS

// DATA TYPES

enum TCSSConditionType

{

  ID_CONDITION = 1,

  CLASS_CONDITION,

  ATTRIBUTE_CONDITION,

  ACTIVE_CONDITION,

  LINK_CONDITION,

  VISITED_CONDITION,

  FOCUS_CONDITION

};

// FUNCTION PROTOTYPES

// FORWARD DECLARATIONS

// CLASS DECLARATION

/**

*  This class is the parser for CSS

*  @lib css.lib

*  @since 2.1

*/

class TCSSParser

{

  public:

    // constructor

	  TCSSParser(TText8* aBuffer, TUint32 aLength, TUint32 aEncoding) 

      {  

        iReader.Init(aBuffer, aLength, aEncoding);

        iEventListener = NULL;

      }

    TCSSParser()

      {

        iEventListener = NULL;

      } 

    void Init(TText8* aBuffer, TUint32 aLength, TUint32 aEncoding) 

      {  

        iReader.Init(aBuffer, aLength, aEncoding);

        iEventListener = NULL;

      }

  public: // New functions

    TBrowserStatusCode ParseStyleSheet(MCSSEventListener* aEventListener);

    TBrowserStatusCode SimpleSelectorListIterate(TCSSSimpleSelector* aSimpleSelector);

    TBrowserStatusCode ConditionListIterate(TText8* aConditionType,

                                     TCSSReaderUnit *aValue1,

                                     TCSSReaderUnit *aValue2);

    TBrowserStatusCode DeclarationListIterate(TCSSReaderUnit* aProperty,

                                   TCSSPropertyVal* aPropertyVal,

                                   TUint8 *aNumVals,

                                   TUint8 maxVals,

                                   TBool* aImportant);

    TBrowserStatusCode ParserRGB(TCSSPropertyVal* aRVal,

                          TCSSPropertyVal* aGVal,

                          TCSSPropertyVal* aBVal);

    TUint32 ParseCharset();

    void SetPosition(TText8* aPosition);

    inline TUint32 GetEncoding(){return iReader.GetEncoding();}

    inline TCSSReader* GetReader() {return &iReader;}

    inline TText8* GetPosition(){ return iReader.GetBufferPointer();}

    private: //methods

      TBool ParseElementName(TCSSReaderUnit* aNameSpace, TCSSReaderUnit* aElementName);

      TBrowserStatusCode SelectorListIterate(TCSSReaderUnit* aTargetElement,

                                      TUint32 *aSpecificity);

      TBrowserStatusCode ParseRule();

      TBool HasValidMedia();

      TBrowserStatusCode ParseImportRule();

      TBrowserStatusCode ParseMediaRule();

      TBrowserStatusCode ParseStyleRules();

      TBrowserStatusCode ParseHeader();

      TBrowserStatusCode ParserPropertyVal(TCSSPropertyVal* aPropertyVal);

    private:    // Data

      // lexer

      TCSSReader iReader;

      // event listener to get the CSS events like start Selector

      MCSSEventListener* iEventListener;

};

#endif /* TCSSParser_H */