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os/textandloc/textrendering/textformatting/tbox/FormLinePag.cpp
author sl
Tue, 10 Jun 2014 14:32:02 +0200
changeset 1 260cb5ec6c19
permissions -rw-r--r--
Update contrib. 
     1 /*

     2 * Copyright (c) 2001-2009 Nokia Corporation and/or its subsidiary(-ies).

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

     5 * under the terms of "Eclipse Public License v1.0"

     6 * which accompanies this distribution, and is available

     7 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description: 

    15 *

    16 */

    17 

    18 

    19 #include "FRMPAGE.H"

    20 #include "FRMCONST.H"

    21 

    22 #include "OstTraceDefinitions.h"

    23 #ifdef OST_TRACE_COMPILER_IN_USE

    24 #include "FormLinePagTraces.h"

    25 #endif

    26 

    27 #ifdef SYMBIAN_ENABLE_SPLIT_HEADERS

    28 #include "FRMCONST_INTERNAL.H"

    29 #include "FRMCONST_PARTNER.H"

    30 #endif

    31 

    32 TLinePaginator::TLinePaginator():

    33 	iPageList(NULL),

    34 	iDocPos(0),

    35 	iKeepWithPrev(ETrue),

    36 	iPageHeight(0),

    37 	iHeightRem(0),

    38 	iBreakOnPage(EFalse),

    39 	iPrevPageBreak(0),

    40 	iHeightLines(0),

    41 	iFirstLine(ETrue)

    42 	{

    43 	}

    44 

    45 TBool TLinePaginator::AppendLineL(TPageLine aLine)

    46     //

    47 	{

    48 	TBool pageBreak=EFalse;

    49 

    50 	if(aLine.iStartNewPage && !iFirstLine)	  

    51 		{

    52 		SetPotentialBreakPoint(aLine.iDocPos);

    53 		InsertPageBreakL();

    54 		pageBreak=ETrue;

    55 		}

    56 	else

    57 		{ 

    58 		if (!iKeepWithPrev)

    59 			SetPotentialBreakPoint(aLine.iDocPos);

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

    61 			{

    62 			pageBreak=ETrue;

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

    64 			if (iBreakOnPage)

    65 				{

    66 				InsertPageBreakL();

    67 				if (aLine.iLineHeight > iHeightRem)

    68 					{

    69 					if (iHeightLines!=0)

    70 						{

    71 						SetPotentialBreakPoint(aLine.iDocPos);

    72 						InsertPageBreakL();

    73 						}

    74 					CheckTallLineL(aLine);

    75 					}

    76 				}

    77 			else 

    78 				{

    79 				if (!iFirstLine)

    80 					{

    81 					SetPotentialBreakPoint(aLine.iDocPos);

    82 					InsertPageBreakL();

    83 					}

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

    85 				}

    86 			}

    87 		}

    88 	

    89 	iFirstLine=EFalse;

    90 	iHeightLines+=aLine.iLineHeight;

    91 	iKeepWithPrev=aLine.iKeepWithNext;

    92 	return pageBreak;

    93 	}

    94 

    95 void TLinePaginator::InsertPageBreakL()

    96 	{

    97 	iBreakOnPage=EFalse;

    98 	iHeightRem=iPageHeight;

    99 	iKeepWithPrev=EFalse;

   100 	TInt deltaDocPos=iDocPos-iPrevPageBreak; 

   101 	if (deltaDocPos<=0)

   102 	    {

   103 	    OstTrace0( TRACE_DUMP, TLINEPAGINATOR_INSERTPAGEBREAKL, "EFInvalidNumberCharsOnPage" );

   104 	    }

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

   106 	iPageList->AppendL(deltaDocPos);

   107 	iPrevPageBreak=iDocPos;

   108 	}

   109 

   110 void TLinePaginator::CheckTallLineL(TPageLine& aLine)

   111 	{

   112 	while (aLine.iLineHeight>iPageHeight)

   113 		{

   114 		aLine.iLineHeight-=iPageHeight;

   115 		iPageList->AppendL(0);

   116 		}

   117 	}

   118 

   119 void TLinePaginator::FlushL(TInt aEndDocPos)

   120 	{

   121 	SetPotentialBreakPoint(aEndDocPos);

   122 	InsertPageBreakL();

   123 	}

   124 

   125 void TLinePaginator::SetPageHeight(TInt aPageHeight)

   126 	{

   127 	iPageHeight=aPageHeight;

   128 	iHeightRem=aPageHeight;

   129 	Reset();

   130 	}

   131 

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

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

   134 	{

   135 	iPageList=aCharsPerPage;

   136 	

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

   138 	if (iPageList->Count() > 0)

   139 		Reset();

   140 	}

   141 

   142 void TLinePaginator::Reset()

   143 	{

   144 	iBreakOnPage=EFalse;

   145 	iKeepWithPrev=ETrue;

   146 	iPrevPageBreak=iDocPos=0;

   147 	iFirstLine=ETrue;

   148 	iHeightRem=iPageHeight;

   149 

   150 	ResetArray();

   151 	}

   152 

   153 void TLinePaginator::ResetArray()

   154 	{

   155 	iPageList->Reset();

   156 	iPageList->Compress();

   157 	}

   158 

   159 void TLinePaginator::SetPotentialBreakPoint(TInt aDocPos)

   160 	{

   161 	iBreakOnPage=ETrue;

   162 	iDocPos=aDocPos;

   163 	iHeightRem-=iHeightLines;

   164 	iHeightLines=0;

   165 	}
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