author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Tue, 02 Feb 2010 02:02:46 +0200 | |
changeset 0 | 1fb32624e06b |
permissions | -rw-r--r-- |
0
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/* |
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* Copyright (c) 2006-2009 Nokia Corporation and/or its subsidiary(-ies). |
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* All rights reserved. |
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* This component and the accompanying materials are made available |
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* under the terms of "Eclipse Public License v1.0" |
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* which accompanies this distribution, and is available |
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* at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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* |
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* Initial Contributors: |
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* Nokia Corporation - initial contribution. |
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* |
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* Contributors: |
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* |
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* Description: |
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* |
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*/ |
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|
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#include "TmLayoutImp.h" |
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#include "frmUtils.h" |
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CTmFormatContext::CTmFormatContext(MTmSource& aSource,const TTmFormatParam& aFormatParam,CTmCode& aCode, |
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CTmTextLayout* aTextLayout,const TBidirectionalContext* aBdContext): |
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iSource(aSource), |
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iParam(aFormatParam), |
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iTextCache(aSource,aSource.FormatDevice()), |
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iCode(aCode), |
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iLineInPar(iParam.iLineInPar), |
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iTextLayout(aTextLayout) |
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{ |
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iInfo.iEndChar = iParam.iStartChar; |
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iDocumentLength = iSource.DocumentLength(); |
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iActualEndChar = Min(iParam.iEndChar,iDocumentLength + 1); |
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if (aBdContext) |
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iBdState = *aBdContext; |
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CalculateScale(iSource,iXScale,iYScale); |
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} |
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|
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CTmFormatContext::~CTmFormatContext() |
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{ |
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iTextCache.Close(); |
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iParFormat.Close(); |
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} |
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|
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void CTmFormatContext::ResolveParagraphDirectionality() |
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{ |
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if (!(iParFormat.iFlags & RTmParFormat::EDirectionalityFromText)) |
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// Paragraph directionality is explicit. |
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return; |
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// iInfo.iEndChar is actually the start of this line, as the line has not been |
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// set up yet! |
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TInt positionOfLastStrongCategoryInPara = 0; |
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TInt startPosOfThisLine = -1; |
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TChar::TBdCategory firstStrongCategory = FirstStrongCategoryInParagraph( |
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iSource.ParagraphStart(iInfo.iEndChar), iTextCache, positionOfLastStrongCategoryInPara, startPosOfThisLine); |
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// Override the directionality set in ERightToLeft only if the text |
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// gives us the information. |
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if (firstStrongCategory < TChar::ERightToLeft) |
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{ |
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iParFormat.iFlags &= ~RTmParFormat::ERightToLeft; |
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iParFormat.iFlags &= ~RTmParFormat::EDirectionalityFromText; |
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} |
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else if (firstStrongCategory <= TChar::ERightToLeftOverride) |
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{ |
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iParFormat.iFlags |= RTmParFormat::ERightToLeft; |
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iParFormat.iFlags &= ~RTmParFormat::EDirectionalityFromText; |
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} |
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} |
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|
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void CTmFormatContext::SetParagraphMetricsL() |
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{ |
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iSource.GetParagraphFormatL(iInfo.iEndChar,iParFormat); |
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ResolveParagraphDirectionality(); |
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int bullet_margin, bullet_width; |
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MGraphicsDeviceMap& device = Device(); |
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TmGetMarginsL(device,iParFormat,iLeftMargin,iRightMargin,iFirstLineLeftMargin,iFirstLineRightMargin, |
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bullet_margin,bullet_width,iBulletAscent,iBulletDescent); |
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iLineSpacing = iParFormat.iLineSpacing; |
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if (iLineSpacing && (!(iParFormat.iFlags & RTmParFormat::EPixelLineSpacing))) |
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iLineSpacing = device.VerticalTwipsToPixels(iLineSpacing); |
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iExactLineSpacing = iParFormat.iFlags & RTmParFormat::EExactLineSpacing; |
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iSpaceBefore = iParFormat.iSpaceAbove; |
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if (iSpaceBefore) |
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iSpaceBefore = device.VerticalTwipsToPixels(iSpaceBefore); |
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iSpaceAfter = iParFormat.iSpaceBelow; |
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if (iSpaceAfter) |
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iSpaceAfter = device.VerticalTwipsToPixels(iSpaceAfter); |
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|
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if (iParFormat.HaveBorders()) |
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{ |
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int dummy; |
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iHBorderMargin = device.HorizontalTwipsToPixels(iParFormat.iBorderMargin); |
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iVBorderMargin = device.VerticalTwipsToPixels(iParFormat.iBorderMargin); |
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TmGetBorderWidth(device,iParFormat,RTmParFormat::ETopBorder,dummy,iTopBorder); |
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TmGetBorderWidth(device,iParFormat,RTmParFormat::EBottomBorder,dummy,iBottomBorder); |
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TmGetBorderWidth(device,iParFormat,RTmParFormat::ELeadingBorder,dummy,iLeftBorder); |
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TmGetBorderWidth(device,iParFormat,RTmParFormat::ETrailingBorder,dummy,iRightBorder); |
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} |
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|
101 |
else |
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|
102 |
iLeftBorder = iRightBorder = iTopBorder = iBottomBorder = iHBorderMargin = iVBorderMargin = 0; |
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|
103 |
} |
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|
104 |
|
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|
105 |
// A static function to format a range of text. |
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|
106 |
void CTmFormatContext::FormatL(MTmSource& aSource,const TTmFormatParam& aFormatParam,CTmCode& aCode,TInfo& aInfo, |
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|
107 |
CTmTextLayout* aTextLayout, const TBidirectionalContext* aStartBdState, TBidirectionalContext* aEndBdState, |
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|
108 |
TBidirectionalEndOfLineContext* aStartBdContext) |
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|
109 |
{ |
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110 |
CTmFormatContext *context = new(ELeave) CTmFormatContext(aSource,aFormatParam,aCode,aTextLayout,aStartBdState); |
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|
111 |
|
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112 |
// Set the context obtained from the previous line from the byte code, if it exists. If not, then it will be just NULL |
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113 |
context->iTextLayout->SetCurrentContextChar(aInfo.iContextCharPerLine); |
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|
114 |
|
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|
115 |
CleanupStack::PushL(context); |
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116 |
if (aStartBdContext) |
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117 |
aStartBdContext->Set(context->iTextCache, aFormatParam.iStartChar); |
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118 |
context->FormatL(); |
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119 |
aInfo = context->iInfo; |
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120 |
if (aEndBdState) |
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|
121 |
aEndBdState->Set(context->iBdState, context->iBdEndOfLine); |
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122 |
CleanupStack::PopAndDestroy(context); |
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123 |
} |
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|
124 |
|
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125 |
void CTmFormatContext::FormatL() |
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126 |
{ |
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127 |
// Format lines until the text is used up. |
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|
128 |
TBool at_least_max_height = iParam.iFlags & TTmFormatParamBase::EAtLeastMaxHeight; |
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129 |
TBool too_high = FALSE; |
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130 |
int lines = 0; |
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|
131 |
iInfo.iFirstLineEndChar = -1; |
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132 |
int margin_width = 0; |
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|
133 |
|
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|
134 |
while (iInfo.iEndChar < iActualEndChar && lines < iParam.iMaxLines && !too_high) |
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|
135 |
{ |
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|
136 |
if (lines == 0 || iLineInPar == 0) |
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|
137 |
{ |
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|
138 |
SetParagraphMetricsL(); |
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|
139 |
} |
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|
140 |
|
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|
141 |
if (iLineInPar == 0) |
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|
142 |
{ |
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|
143 |
iBdState.Reset(); |
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|
144 |
iBdEndOfLine.Reset(); |
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|
145 |
} |
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|
146 |
margin_width = iLineInPar == 0 ? iFirstLineLeftMargin + iFirstLineRightMargin : iLeftMargin + iRightMargin; |
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|
147 |
// Set the context for this line obtained from the previous line before formatting this line |
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|
148 |
iLine.SetContextChar(iTextLayout->GetCurrentContextChar(), EFalse); |
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|
149 |
iLine.FormatL(*this); |
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150 |
// Set the context of this line once it has been formatted. This context is the context of the last chunk of this line, |
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151 |
// so that the next line can continue in the same context. |
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|
152 |
iLine.SetContextChar(0, ETrue); |
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|
153 |
// Set the context of this line to CTmTextLayout to keep a record of it. |
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|
154 |
iTextLayout->SetCurrentContextChar(iLine.GetContextChar()); |
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|
155 |
|
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|
156 |
iInfo.iLastLineStartChar = iInfo.iEndChar; |
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|
157 |
if (iInfo.iFirstLineEndChar == -1) |
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|
158 |
iInfo.iFirstLineEndChar = iLine.NextLineStartChar(); |
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Revision: 201003
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|
159 |
int scaled_next_height = iInfo.iHeight + iLine.Height(); |
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|
160 |
if (iYScale != 1000) |
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|
161 |
scaled_next_height = scaled_next_height * iYScale / 1000; |
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Revision: 201003
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|
162 |
too_high = scaled_next_height > iParam.iMaxHeight; |
1fb32624e06b
Revision: 201003
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|
163 |
if (too_high && !at_least_max_height) |
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Revision: 201003
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|
164 |
break; |
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Revision: 201003
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|
165 |
iLine.WriteCodeL(*this); |
1fb32624e06b
Revision: 201003
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|
166 |
int width = iLine.InnerBounds().Width() + margin_width; |
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|
167 |
if (width > iInfo.iWidth) |
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|
168 |
iInfo.iWidth = width; |
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|
169 |
iInfo.iHeight += iLine.Height(); |
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|
170 |
if (iLine.AtParEnd()) |
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|
171 |
iLineInPar = 0; |
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|
172 |
else |
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|
173 |
iLineInPar++; |
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Revision: 201003
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|
174 |
lines++; |
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Revision: 201003
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|
175 |
iInfo.iEndChar = iLine.NextLineStartChar(); |
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Revision: 201003
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|
176 |
} |
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Revision: 201003
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|
177 |
|
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|
178 |
// Scale the height and width if necessary. |
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|
179 |
if (iYScale != 1000) |
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|
180 |
iInfo.iHeight = iInfo.iHeight * iYScale / 1000; |
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Revision: 201003
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|
181 |
if (iXScale != 1000) |
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|
182 |
iInfo.iWidth = iInfo.iWidth * iXScale / 1000; |
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Revision: 201003
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|
183 |
} |
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Revision: 201003
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diff
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|
184 |
|
1fb32624e06b
Revision: 201003
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|
185 |
/* |
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Revision: 201003
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|
186 |
Get the margins and bullet metrics. If there is a bullet and aFont is non-null, return a font |
1fb32624e06b
Revision: 201003
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|
187 |
that may be used to draw the bullet. |
1fb32624e06b
Revision: 201003
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|
188 |
*/ |
1fb32624e06b
Revision: 201003
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|
189 |
void TmGetMarginsL(MGraphicsDeviceMap& aDevice,const RTmParFormat& aParFormat, |
1fb32624e06b
Revision: 201003
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|
190 |
TInt& aLeftMargin,TInt& aRightMargin, |
1fb32624e06b
Revision: 201003
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|
191 |
TInt& aFirstLineLeftMargin,TInt& aFirstLineRightMargin, |
1fb32624e06b
Revision: 201003
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diff
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|
192 |
TInt& aBulletMargin,TInt& aBulletWidth, |
1fb32624e06b
Revision: 201003
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|
193 |
TInt& aBulletAscent,TInt& aBulletDescent,CFont** aFont) |
1fb32624e06b
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|
194 |
{ |
1fb32624e06b
Revision: 201003
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|
195 |
int trailing_margin = aParFormat.iTrailingMargin; |
1fb32624e06b
Revision: 201003
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|
196 |
if (trailing_margin) |
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Revision: 201003
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|
197 |
trailing_margin = aDevice.HorizontalTwipsToPixels(trailing_margin); |
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|
198 |
|
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Revision: 201003
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|
199 |
// Bullets change the leading margin and first-line indent. |
1fb32624e06b
Revision: 201003
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|
200 |
int leading_margin = aParFormat.iLeadingMargin; |
1fb32624e06b
Revision: 201003
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|
201 |
int indent = aParFormat.iFirstLineIndent; |
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const TTmBullet* bullet = aParFormat.Bullet(); |
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if (bullet) |
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204 |
{ |
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TFontSpec fontspec; |
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bullet->iFontSpec.GetTFontSpec(fontspec); |
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|
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CFont* font = NULL; |
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TInt error = aDevice.GetNearestFontInTwips(font,fontspec); |
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|
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if (!font) |
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|
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User::Leave(error); |
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|
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aBulletWidth = font->CharWidthInPixels(bullet->iCharacterCode); |
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aBulletAscent = font->AscentInPixels(); |
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aBulletDescent = font->DescentInPixels(); |
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if (aFont) |
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|
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*aFont = font; |
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|
216 |
else |
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|
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aDevice.ReleaseFont(font); |
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|
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int first_line_indent = leading_margin + indent; |
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|
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if (bullet->iHangingIndent) |
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220 |
{ |
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aBulletMargin = aDevice.HorizontalTwipsToPixels(Min(leading_margin,first_line_indent)); |
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first_line_indent = leading_margin = Max(leading_margin,first_line_indent); |
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223 |
} |
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|
224 |
else |
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aBulletMargin = aDevice.HorizontalTwipsToPixels(leading_margin); |
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indent = first_line_indent - leading_margin; |
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|
227 |
} |
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|
228 |
else |
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|
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aBulletMargin = aBulletWidth = aBulletAscent = aBulletDescent = 0; |
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|
230 |
|
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|
231 |
if (leading_margin) |
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Revision: 201003
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|
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leading_margin = aDevice.HorizontalTwipsToPixels(leading_margin); |
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|
233 |
|
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Revision: 201003
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|
234 |
/* |
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|
235 |
Indents are converted to pixels like this so that if the indent in twips is |
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236 |
the negative of the leading margin, so as to get a zero indent for the first line, this |
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|
237 |
is also true after conversion to pixels. Not doing this causes twip values of 360 and -360 |
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Revision: 201003
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|
238 |
to become 30 and -29 pixels at standard Series 5 resolution. |
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|
239 |
*/ |
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|
240 |
if (indent >= 0) |
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|
241 |
indent = aDevice.HorizontalTwipsToPixels(indent); |
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|
242 |
else if (indent < 0) |
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Revision: 201003
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diff
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|
243 |
indent = -aDevice.HorizontalTwipsToPixels(-indent); |
1fb32624e06b
Revision: 201003
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|
244 |
int bullet_overshoot = aBulletMargin + aBulletWidth - leading_margin - indent; |
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Revision: 201003
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245 |
if (bullet_overshoot > 0) |
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Revision: 201003
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|
246 |
indent += bullet_overshoot; |
1fb32624e06b
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|
247 |
|
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Revision: 201003
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|
248 |
if (aParFormat.RightToLeft()) |
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249 |
{ |
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|
250 |
aLeftMargin = trailing_margin; |
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Revision: 201003
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|
251 |
aRightMargin = leading_margin; |
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Revision: 201003
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|
252 |
aFirstLineLeftMargin = trailing_margin; |
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Revision: 201003
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|
253 |
aFirstLineRightMargin = leading_margin + indent; |
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Revision: 201003
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|
254 |
} |
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|
255 |
else |
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|
256 |
{ |
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Revision: 201003
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|
257 |
aLeftMargin = leading_margin; |
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Revision: 201003
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|
258 |
aRightMargin = trailing_margin; |
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Revision: 201003
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|
259 |
aFirstLineLeftMargin = leading_margin + indent; |
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Revision: 201003
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|
260 |
aFirstLineRightMargin = trailing_margin; |
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Revision: 201003
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|
261 |
} |
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Revision: 201003
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|
262 |
} |
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Revision: 201003
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diff
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|
263 |
|
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Revision: 201003
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diff
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|
264 |
void TmGetBorderWidth(const MGraphicsDeviceMap& aDevice,const RTmParFormat& aParFormat,RTmParFormat::TBorderIndex aSide, |
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Revision: 201003
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|
265 |
TInt& aSingle,TInt& aFull) |
1fb32624e06b
Revision: 201003
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|
266 |
{ |
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Revision: 201003
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|
267 |
aSingle = 0; |
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Revision: 201003
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|
268 |
const TTmParBorder* b = aParFormat.Border(aSide); |
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Revision: 201003
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|
269 |
if (b) |
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Revision: 201003
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|
270 |
{ |
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Revision: 201003
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|
271 |
int width = b->iWeight; |
1fb32624e06b
Revision: 201003
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|
272 |
if (width) |
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|
273 |
{ |
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Revision: 201003
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|
274 |
if (aSide == RTmParFormat::ELeadingBorder || aSide == RTmParFormat::ETrailingBorder) |
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Revision: 201003
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|
275 |
width = aDevice.HorizontalTwipsToPixels(width); |
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Revision: 201003
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|
276 |
else |
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Revision: 201003
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|
277 |
width = aDevice.VerticalTwipsToPixels(width); |
1fb32624e06b
Revision: 201003
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|
278 |
if (width <= 0) |
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Revision: 201003
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|
279 |
width = 1; |
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Revision: 201003
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|
280 |
aSingle = width; |
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Revision: 201003
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|
281 |
if (b->iStyle == TTmParBorder::EDoubleStyle) |
1fb32624e06b
Revision: 201003
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|
282 |
aFull = width * 3; |
1fb32624e06b
Revision: 201003
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|
283 |
else |
1fb32624e06b
Revision: 201003
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diff
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|
284 |
aFull = width; |
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Revision: 201003
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diff
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|
285 |
} |
1fb32624e06b
Revision: 201003
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diff
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|
286 |
} |
1fb32624e06b
Revision: 201003
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diff
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|
287 |
} |
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Revision: 201003
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parents:
diff
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|
288 |
|
1fb32624e06b
Revision: 201003
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|
289 |
// Subtract aQ from aP, giving four non-overlapping remainder rectangles aR, any or all of which may be empty. |
1fb32624e06b
Revision: 201003
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|
290 |
void SubtractRect(const TRect& aP,const TRect& aQ,TRect* aR) |
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Revision: 201003
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|
291 |
{ |
1fb32624e06b
Revision: 201003
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|
292 |
TRect q = aQ; |
1fb32624e06b
Revision: 201003
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|
293 |
q.Intersection(aP); |
1fb32624e06b
Revision: 201003
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diff
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|
294 |
if (q.IsEmpty()) |
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Revision: 201003
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|
295 |
q.SetRect(aP.iTl,aP.iTl); |
1fb32624e06b
Revision: 201003
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|
296 |
aR[0] = aP; |
1fb32624e06b
Revision: 201003
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|
297 |
aR[0].iBr.iY = q.iTl.iY; |
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Revision: 201003
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|
298 |
aR[1] = aP; |
1fb32624e06b
Revision: 201003
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|
299 |
aR[1].iTl.iY = q.iBr.iY; |
1fb32624e06b
Revision: 201003
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|
300 |
aR[2] = q; |
1fb32624e06b
Revision: 201003
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diff
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|
301 |
aR[2].iTl.iX = aP.iTl.iX; |
1fb32624e06b
Revision: 201003
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diff
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|
302 |
aR[2].iBr.iX = q.iTl.iX; |
1fb32624e06b
Revision: 201003
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parents:
diff
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|
303 |
aR[3] = q; |
1fb32624e06b
Revision: 201003
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parents:
diff
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|
304 |
aR[3].iTl.iX = q.iBr.iX; |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
305 |
aR[3].iBr.iX = aP.iBr.iX; |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
306 |
} |