/*

* Copyright (c) 2002-2009 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: 

*

*/

#include "TmChunkInterp.h"

TTmChunkInterpreter::TTmChunkInterpreter(const CTmTextLayout& aTextLayout)

	: TTmInterpreter(TTmInterpreterParam(aTextLayout))

	{

	}

TBool TTmChunkInterpreter::ChunkSetToLeftOfLine(

	const TTmDocPosSpec& aDocPos)

	{

	if(!DocPosToLine(aDocPos))

		return EFalse;

	return ChunkNext();

	}

TTmChunkInterpreter::TContainment

	TTmChunkInterpreter::ChunkContainsPos(const TTmDocPosSpec& aDocPos) const

	{

	if (aDocPos.iPos < iStart)

		return ENotInChunk;

	if (iEnd < aDocPos.iPos)

		return ENotInChunk;

	if (iStart < aDocPos.iPos && aDocPos.iPos < iEnd)

		return EMiddleOfChunk;

	// sort out the boundary cases.

	switch (aDocPos.iType)

		{

	case TTmDocPosSpec::ERightToLeft:

		if (iRightToLeft)

			return aDocPos.iPos == iStart? ERightEdgeOfChunk : ELeftEdgeOfChunk;

		break;

	case TTmDocPosSpec::ELeftToRight:

		if (!iRightToLeft)

			return aDocPos.iPos == iStart? ELeftEdgeOfChunk : ERightEdgeOfChunk;

		break;

	case TTmDocPosSpec::ELeading:

		if (aDocPos.iPos == iStart)

			return iRightToLeft? ERightEdgeOfChunk : ELeftEdgeOfChunk;

		break;

	case TTmDocPosSpec::ETrailing:

		if (aDocPos.iPos == iEnd)

			return iRightToLeft? ELeftEdgeOfChunk : ERightEdgeOfChunk;

		break;

		}

	return ENotInChunk;

	}

TBool TTmChunkInterpreter::ChunkNext()

	{

	while (Next() && Op() != EOpLine)

		{

		if (Op() == EOpText || Op() == EOpSpecialChar)

			{

			iStart = StartChar();

			iEnd = EndChar();

			iRightToLeft = RightToLeft();

			return ETrue;

			}

		else

			Skip();

		}

	return EFalse;

	}