// Copyright (c) 2005-2009 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:

// HTML parser header

// @publishedAll

// @released

// 

//

#ifndef _HTMLPARSER_H

#define _HTMLPARSER_H

#include <xml/parserfeature.h>

#include <xml/plugins/parserinitparams.h>

class CDesC8ArrayFlat;

class CStringParser;

class CHtmlParser : public CBase 

	{

	public:

		enum TTagState

			{

			ENoTag,

			EOpeningTag,

			EClosingTag,

			EText

			};

		enum TParserState

			{

			EInitialState,

			ESeeStartOfTag,

			ESeeEndOfTag,

			ESeeClosingTagIndicator,

			ESeeEquals,

			ESeeExclamationMark,

			ESeeEndOfTagWhileReadingJavascript,

			EReadingOpeningTag,

			EReadingClosingTag,

			EReadingAttribute,

			EReadingAttributeValue,

			EReadingAttributeValueWithinApos,

			EReadingAttributeValueWithinQuot,

			EReadingText,

			EReadingJavascript,

			EFinishedReadingTag,

			EFinishedReadingAttribute,

			EFinishedReadingAttributeValue			

			};

		static CHtmlParser* NewL ( Xml::MContentHandler& aContentHandler, RStringPool& aStringPool );	

		~CHtmlParser ();

		void ParseL ( const TDesC8& aBuffer, TBool aLastChunk = EFalse );	

		void SetContentSink(class Xml::MContentHandler& );

	private:

		CHtmlParser ( Xml::MContentHandler& aContentHandler, RStringPool& aStringPool );

		void ConstructL ();		

		void CreateTagInfoLC ( Xml::RTagInfo& aTagInfo, const TDesC8& aTag );

		void ParseContentL ( const TDesC8& aContent, TBool aLastChunk = EFalse );		

		void ParseTaggedBufferL ( const TPtrC8& aTaggedBuffer, TBool aPartial = EFalse );

		void ProcessPartialContentL ( CStringParser& aParser );

		void AddToPartialContentL ( const TPtrC8& aContent, TBool aAppend = EFalse ); 

		void ParseStartDocumentL ( CStringParser& aParser );

		void ProcessTextL ( const TPtrC8& aText );	

		TBool InspectCurrentCharacter( TChar aChar );

		void  SeeWhiteSpaceCharacterInTag( TBool& aBool );

		void  SeeSpecialCharactersInTag( TChar aChar, TBool& aBool );

		void  SeeOtherCharactersInTag();

		void  SeeOtherCharactersNotInTag( TBool& aBool );

		TBool CheckAndRemoveTagL ( const TPtrC8& aTag );

		void CallStartElementL ( const TDesC8& aTag );

		void CallEndElementL ( const TDesC8& aTag );

		void CallStartDocumentL ( const TDesC8& aCharset );		

		TBool IsOptionalTagL ( const TDesC8& aTag );

		void CheckAndProcessLastOptionalTagL ( const TDesC8& aTag );

		TBool IsForbiddenTagL ( const TDesC8& aTag );

		void CheckAndProcessForbiddenTagL ( const TDesC8& aTag );

		void ExtractCharsetL ( const TDesC8& aContent, TPtrC8& aCharset, TBool& aXMLFound );

		void ExtractCharsetValueL ( const TDesC8& aContent, const TDesC8& aSearchValue, TPtrC8& aCharset );

	private:	

		Xml::MContentHandler* 	iContentHandler;

		RStringPool& 			iStringPool;

		TTagState				iTagState;

		TParserState			iParserState;	

		TBool 					iInTag;

		HBufC8*					iPartialContent; // Content which is pending to parse.

		CDesC8ArrayFlat*		iTagAttribute;

		CDesC8ArrayFlat* 		iTagAttributeValue;

		CDesC8ArrayFlat*		iTagQueue;

		TBool 					iFirst;

		TBool					iEndDocCalled;		

	};

#endif // _HTMLPARSER_H