/*

* Copyright (c) 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 <frmtlay.h>

#include <frmtview.h>

#include <tagma.h>

#ifdef SYMBIAN_ENABLE_SPLIT_HEADERS

#include <tagmalayoutandsource.h>

#endif

#include "FromCursorModifierUtils.h"

TFormCursorModifierUtils::~TFormCursorModifierUtils()

	{

	}

TFormCursorModifierUtils::TFormCursorModifierUtils(CTextView& aTextView, CTextLayout& aTextLayout) :

	iTextView(aTextView),

	iTextLayout(aTextLayout)

	{

	}

TTmDocPosSpec TFormCursorModifierUtils::DocPos() const

	{

	TTmDocPosSpec docPos = TTmDocPosSpec();

	TTmDocPos rawDocPos;

	iTextView.GetCursorPos(rawDocPos);

	docPos.iPos = rawDocPos.iPos;

	TTmDocPosSpec::TType docPosType = rawDocPos.iLeadingEdge ? TTmDocPosSpec::ELeading : TTmDocPosSpec::ETrailing;

	docPos.iType = docPosType;

	return docPos;

	}

void TFormCursorModifierUtils::SetDocPosL(const TTmDocPosSpec& aDocPos)

	{

	iTextView.SetDocPosL(aDocPos);

	}

TBool TFormCursorModifierUtils::IsRightToLeftParagraph(TTmDocPosSpec aPos)

	{

	TTmPosInfo2 posInfo;

	TTmLineInfo lineInfo;

	iTextLayout.TagmaTextLayout().FindDocPos(aPos, posInfo, lineInfo);

	return lineInfo.iFlags & TTmLineInfo::EParRightToLeft;

	}

TBool TFormCursorModifierUtils::VisualCursorBetweenOpposingChunks()

	{

	TTmDocPosSpec pos = DocPos();

	CTmTextLayout::TTmChunkDescription leftChunk;

	CTmTextLayout::TTmChunkDescription rightChunk;

	iTextLayout.TagmaTextLayout().FindAdjacentChunks(pos, leftChunk, rightChunk);

	if (leftChunk.iRightToLeft != rightChunk.iRightToLeft)

		return ETrue;

	return EFalse;

	}

void TFormCursorModifierUtils::ToggleVisualDocPosL()

	{

	TTmDocPosSpec pos = DocPos();

	pos.iType = (pos.iType == TTmDocPosSpec::ETrailing) ? TTmDocPosSpec::ELeading : TTmDocPosSpec::ETrailing;

	SetDocPosL(pos);

	}

void TFormCursorModifierUtils::ToggleLogicalDocPosL()

	{

	TTmDocPosSpec pos = DocPos();

	CTmTextLayout::TTmChunkDescription leftChunk;

	CTmTextLayout::TTmChunkDescription rightChunk;

	iTextLayout.TagmaTextLayout().FindAdjacentChunks(pos, leftChunk, rightChunk);

	TBool MoveToLeftChunk = EFalse;

	TBool MoveToRightChunk = EFalse;

	if ((!leftChunk.iRightToLeft && pos.iPos == leftChunk.iEnd) ||

		(leftChunk.iRightToLeft && pos.iPos == leftChunk.iStart))

		MoveToRightChunk = ETrue;

	else if ((!rightChunk.iRightToLeft && pos.iPos == rightChunk.iStart) ||

			 (rightChunk.iRightToLeft && pos.iPos == rightChunk.iEnd))

		MoveToLeftChunk = ETrue;

	TBool toggleLeadingTrailing = EFalse;

	if (leftChunk.iRightToLeft == rightChunk.iRightToLeft)

		toggleLeadingTrailing = ETrue;

	if (MoveToLeftChunk)

		{

		if (toggleLeadingTrailing)

			pos.iType = (pos.iType == TTmDocPosSpec::ETrailing) ? TTmDocPosSpec::ELeading : TTmDocPosSpec::ETrailing;

		if (!leftChunk.iRightToLeft) // LTR

			pos.iPos = leftChunk.iEnd;

		else //RTL

			pos.iPos = leftChunk.iStart;

		}

	else if (MoveToRightChunk)

		{

		if (toggleLeadingTrailing)

			pos.iType = (pos.iType == TTmDocPosSpec::ETrailing) ? TTmDocPosSpec::ELeading : TTmDocPosSpec::ETrailing;

		if (!rightChunk.iRightToLeft) // LTR

			pos.iPos = rightChunk.iStart;

		else //RTL

			pos.iPos = rightChunk.iEnd;

		}

	SetDocPosL(pos);

	}