// pod_lexer.h

// 

// Copyright (c) 2009 - 2010 Accenture. All rights reserved.

// This component and the accompanying materials are made available

// under the terms of the "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:

// Accenture - Initial contribution

//

#ifndef __POD_LEXER_H__

#define __POD_LEXER_H__

#include <e32std.h>

const TInt KMaxNestedAttributes = 16;

/**

 * Responsible for understanding POD interior sequences (B<bold>, I<italic>, etc.).

 */

class TPodLexer

	{

public:

	enum TTokenType

		{

		EAttributePush,

		EAttributePop,

		ETextBlock,

		ECodeBlock,

		ELink,

		EIndexEntry

		};

	enum TAttribute

		{

		ENull		= 0x00000000,

		EBold		= 0x00000001,

		ECode		= 0x00000002,

		EItalic		= 0x00000004,

		EFileName	= 0x00000008

		};

public:

	TPodLexer(const TDesC& aString);

	void NextTokenL(TPtrC& aToken, TTokenType& aTokenType, TUint& aAttributes, TBool& aEop, TBool& aEos);

private:

	TInt SkipToClosingAngleBracket();

	TBool Eop();

	TBool IsInteriorSequenceStart(TUint16& aSequenceIdentifier);

	void PushAttribute(TAttribute aAttribute);

	TAttribute PopAttribute();

private:

	TLex iLex;

	TUint iAttributes;

	TBuf<64> iScratch;

	TFixedArray<TAttribute, KMaxNestedAttributes> iAttributeStack;

	TInt iAttributeStackIndex;

	};

#endif // __POD_LEXER_H__