/*

* Copyright (c) 2001-2009 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 "FRMPAGE.H"

#include "FRMCONST.H"

#ifdef SYMBIAN_ENABLE_SPLIT_HEADERS

#include "FRMCONST_INTERNAL.H"

#include "FRMCONST_PARTNER.H"

#endif

TLinePaginator::TLinePaginator():

	iPageList(NULL),

	iDocPos(0),

	iKeepWithPrev(ETrue),

	iPageHeight(0),

	iHeightRem(0),

	iBreakOnPage(EFalse),

	iPrevPageBreak(0),

	iHeightLines(0),

	iFirstLine(ETrue)

	{

	}

TBool TLinePaginator::AppendLineL(TPageLine aLine)

    //

	{

	TBool pageBreak=EFalse;

	if(aLine.iStartNewPage && !iFirstLine)	  

		{

		SetPotentialBreakPoint(aLine.iDocPos);

		InsertPageBreakL();

		pageBreak=ETrue;

		}

	else

		{ 

		if (!iKeepWithPrev)

			SetPotentialBreakPoint(aLine.iDocPos);

		if (iHeightRem<iHeightLines+aLine.iLineHeight /*&& !iFirstLine*/)

			{

			pageBreak=ETrue;

			//__ASSERT_DEBUG(!iFirstLine || !iBreakOnPage,Panic());		//###

			if (iBreakOnPage)

				{

				InsertPageBreakL();

				if (aLine.iLineHeight > iHeightRem)

					{

					if (iHeightLines!=0)

						{

						SetPotentialBreakPoint(aLine.iDocPos);

						InsertPageBreakL();

						}

					CheckTallLineL(aLine);

					}

				}

			else 

				{

				if (!iFirstLine)

					{

					SetPotentialBreakPoint(aLine.iDocPos);

					InsertPageBreakL();

					}

				CheckTallLineL(aLine);		//This picks up tall lines at the start of the document the above one picks up the rest

				}

			}

		}

	iFirstLine=EFalse;

	iHeightLines+=aLine.iLineHeight;

	iKeepWithPrev=aLine.iKeepWithNext;

	return pageBreak;

	}

void TLinePaginator::InsertPageBreakL()

	{

	iBreakOnPage=EFalse;

	iHeightRem=iPageHeight;

	iKeepWithPrev=EFalse;

	TInt deltaDocPos=iDocPos-iPrevPageBreak; 

	__ASSERT_DEBUG(deltaDocPos>0,FormPanic(EFInvalidNumberCharsOnPage));

	iPageList->AppendL(deltaDocPos);

	iPrevPageBreak=iDocPos;

	}

void TLinePaginator::CheckTallLineL(TPageLine& aLine)

	{

	while (aLine.iLineHeight>iPageHeight)

		{

		aLine.iLineHeight-=iPageHeight;

		iPageList->AppendL(0);

		}

	}

void TLinePaginator::FlushL(TInt aEndDocPos)

	{

	SetPotentialBreakPoint(aEndDocPos);

	InsertPageBreakL();

	}

void TLinePaginator::SetPageHeight(TInt aPageHeight)

	{

	iPageHeight=aPageHeight;

	iHeightRem=aPageHeight;

	Reset();

	}

// It is expected that the array passed in will be an empty one

void TLinePaginator::SetArray(CArrayFix<TInt>* aCharsPerPage)

	{

	iPageList=aCharsPerPage;

	// reset if the array is not (for some reason) already cleared.

	if (iPageList->Count() > 0)

		Reset();

	}

void TLinePaginator::Reset()

	{

	iBreakOnPage=EFalse;

	iKeepWithPrev=ETrue;

	iPrevPageBreak=iDocPos=0;

	iFirstLine=ETrue;

	iHeightRem=iPageHeight;

	ResetArray();

	}

void TLinePaginator::ResetArray()

	{

	iPageList->Reset();

	iPageList->Compress();

	}

void TLinePaginator::SetPotentialBreakPoint(TInt aDocPos)

	{

	iBreakOnPage=ETrue;

	iDocPos=aDocPos;

	iHeightRem-=iHeightLines;

	iHeightLines=0;

	}