author | hgs |
Thu, 24 Jun 2010 11:18:23 +0800 | |
changeset 40 | 91ef7621b7fc |
parent 0 | 1fb32624e06b |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 1999-2009 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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* Text caching for TAGMA: cacheing of text and formats extracted from a text source, |
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* |
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*/ |
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#include "TMSTD.H" |
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#include <bidi.h> |
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#include "OstTraceDefinitions.h" |
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#ifdef OST_TRACE_COMPILER_IN_USE |
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#include "TMGLYPHTraces.h" |
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#endif |
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inline TBool IsSurrogate(TText a) { return 0xD800 == (a & 0xF800); } |
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inline TBool IsHighSurrogate(TText a) { return 0xD800 == (a & 0xFC00); } |
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inline TBool IsLowSurrogate(TText a) { return 0xDC00 == (a & 0xFC00); } |
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inline TChar JoinSurrogates(TText aHigh, TText aLow) |
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{ |
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return ((aHigh - 0xd7f7) << 10) + aLow; |
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} |
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inline TText16 GetHighSurrogate(TUint aChar) |
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{ |
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return STATIC_CAST(TText16, 0xD7C0 + (aChar >> 10)); |
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} |
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inline TText16 GetLowSurrogate(TUint aChar) |
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{ |
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return STATIC_CAST(TText16, 0xDC00 | (aChar & 0x3FF)); |
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} |
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TUint RTmTextCache::Char(TInt aPos) |
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{ |
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if (aPos < 0 || aPos > iDocumentLength) |
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return 0xFFFF; |
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if (aPos == iDocumentLength) |
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return CEditableText::EParagraphDelimiter; |
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if (aPos < iTextStart || aPos >= iTextStart + iTextLength) |
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{ |
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TPtrC p; |
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GetText(aPos,KMaxTInt,p); |
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} |
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if ( IsHighSurrogate( iText[aPos-iTextStart] ) ) |
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{ |
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if (iTextStart+iTextLength-aPos > 1) |
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{ |
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TText high = iText[aPos-iTextStart]; |
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TText low = iText[aPos-iTextStart+1]; |
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if ( IsLowSurrogate( low ) ) |
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return JoinSurrogates( high, low ); |
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else |
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// If the corrupt surrogate, it is treated as what it is mapped |
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return iSource.Map( high ); |
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} |
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else |
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{ |
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// If the corrupt surrogate, it is treated as what it is mapped |
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return iSource.Map( iText[aPos-iTextStart] ); |
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} |
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} |
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else |
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{ |
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return iText[aPos - iTextStart]; |
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} |
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} |
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|
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/** |
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Measure the width of some text, substituting glyphs where necessary. |
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|
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@param aStart Start position of text in document |
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@param aEnd (Exclusive) end position of text in document |
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@param aRightToLeft True if the text is right-to-left |
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@param aMaxAdvance Measurement will stop if this advance is exceeded |
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@param aOutput Output form text measurement function |
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@param aExtraChar |
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Fetch this much context beyond aEnd. This helps when the text is to be |
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truncated, and aEnd is not certain to be at a cluster boundary. |
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@return Advance width. Side-bearings are not included. */ |
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TInt RTmTextCache::AdvanceWidthL(TInt aStart, TInt aEnd, TBool aRightToLeft, |
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TInt aMaxAdvance, CFbsFont::TMeasureTextOutput* aOutput, TInt aExtraChar) |
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{ |
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// Get the displayed text, up to the copy fit width if necessary. |
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TInt length = aEnd - aStart; |
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TText buffer[KMaxTextChunkSize + 2 + 1]; |
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if (length > KMaxTextChunkSize) |
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TmPanic(ETextWidthBufferOverflow); |
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CTmTextFontCache *font = NULL; |
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|
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// Get the text in logical order. If a custom interface to draw (in later stages) |
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// the text in context exists, then measure the text with context. |
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TInt error; |
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|
108 |
if (Source().GetExtendedInterface(KTmCustomExtensionUid)) |
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|
109 |
{ |
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110 |
error = GetDisplayedText(aStart, aEnd + aExtraChar, |
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|
111 |
aRightToLeft ? ELogicalRightToLeft : ELeftToRight, |
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|
112 |
buffer,iContextCharPerChunk, 0, &font); |
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113 |
} |
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114 |
else |
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115 |
{ |
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116 |
error = GetDisplayedText(aStart, aEnd + aExtraChar, |
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|
117 |
aRightToLeft ? ELogicalRightToLeft : ELeftToRight, |
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118 |
buffer,0, 0, &font); |
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119 |
} |
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120 |
|
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121 |
// Don't push font onto cleanup stack because this method only leaves below. |
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122 |
// If there was an error in GetDisplayedText, font will have been closed |
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123 |
if (error) |
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124 |
User::Leave(error); |
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125 |
|
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126 |
CFont::TMeasureTextInput input; |
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127 |
input.iFlags = aRightToLeft? |
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128 |
CFont::TMeasureTextInput::EFVisualOrderRightToLeft |
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129 |
: CFont::TMeasureTextInput::EFVisualOrder; |
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130 |
|
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131 |
// Create a new buffer which will have the context as well |
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132 |
TPtrC inputText(buffer, length + 2 + aExtraChar); |
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133 |
input.iStartInputChar = 1; |
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134 |
input.iEndInputChar = input.iStartInputChar + length; |
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135 |
input.iMaxBounds = aMaxAdvance; |
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|
136 |
input.iFlags |= CFont::TMeasureTextInput::EFIncludePenPositionInBoundsCheck; |
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|
137 |
CFbsFont::TMeasureTextOutput output; |
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138 |
CFbsFont::TMeasureTextOutput* pOutput = aOutput? aOutput : &output; |
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139 |
// Measure this text in the context supplied. Any punctuations in this chunk |
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140 |
// will now be measured based on this context. |
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|
141 |
TInt width = font->Font().MeasureText(inputText, &input, pOutput); |
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|
142 |
// Do not report initial Zero-Width Joiner or 0xFFFF |
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|
143 |
if (0 != pOutput->iChars) |
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144 |
--pOutput->iChars; |
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|
145 |
|
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|
146 |
// Find the new context at the end of this chunk. This will be used to pass on to the next chunk. |
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147 |
// If the context hasn't changed, pass on the previous context. |
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148 |
TUint last; |
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|
149 |
TInt textLength = input.iStartInputChar + pOutput->iChars; |
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|
150 |
TChar::TBdCategory cat = TChar::ELeftToRight; |
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|
151 |
while (textLength != 0) |
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152 |
{ |
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153 |
TUint charSize = 1; |
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154 |
last = *(inputText.Ptr() + textLength); |
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155 |
if ( IsSurrogate( last ) && textLength > 1 ) |
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156 |
{ |
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|
157 |
TText low = *(inputText.Ptr() + textLength); |
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|
158 |
TText high = *(inputText.Ptr() + textLength - 1); |
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|
159 |
if ( IsLowSurrogate( low ) && IsHighSurrogate( high ) ) |
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|
160 |
{ |
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|
161 |
charSize = 2; |
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|
162 |
last = JoinSurrogates( high, low ); |
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|
163 |
} |
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164 |
else |
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|
165 |
{ |
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|
166 |
// If the corrupt surrogate, it is treated as what it is mapped |
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|
167 |
last = iSource.Map( last ); |
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|
168 |
} |
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|
169 |
} |
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|
170 |
|
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|
171 |
cat = TChar(last).GetBdCategory(); |
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Revision: 201003
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|
172 |
if (last != 65535 && textLength !=0 && |
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|
173 |
(cat == TChar::ELeftToRight || |
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|
174 |
cat == TChar::ERightToLeft || |
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|
175 |
cat == TChar::ERightToLeftArabic)) |
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|
176 |
{ |
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|
177 |
iContextCharPerChunk = last; |
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|
178 |
break; |
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|
179 |
} |
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|
180 |
textLength -= charSize; |
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|
181 |
} |
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|
182 |
|
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|
183 |
// Check if this chunk is a punctuation chunk. If it is not, the context in the byte code for this chunk |
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|
184 |
// will be NULL. Otherwise it will just be the previous context. |
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|
185 |
if (cat == TChar::ELeftToRight || |
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|
186 |
cat == TChar::ERightToLeft || |
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|
187 |
cat == TChar::ERightToLeftArabic || |
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|
188 |
cat == TChar::EWhitespace) |
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|
189 |
{ |
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|
190 |
iContextCharInByteCode = NULL; |
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|
191 |
} |
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|
192 |
else |
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|
193 |
iContextCharInByteCode = iContextCharPerChunk; |
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|
194 |
|
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|
195 |
font->Close(); |
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|
196 |
|
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|
197 |
return width; |
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|
198 |
} |
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|
199 |
|
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|
200 |
/** Measure the width of some text, substituting glyphs where necessary. |
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|
201 |
@param aStart Start position of text in document |
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|
202 |
@param aEnd (Exclusive) end position of text in document |
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|
203 |
@param aRightToLeft True if the text is right-to-left |
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Revision: 201003
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|
204 |
@return width including side-bearings */ |
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Revision: 201003
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|
205 |
TInt RTmTextCache::TotalWidthL(TInt aStart, TInt aEnd, |
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Revision: 201003
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|
206 |
TBool aRightToLeft) |
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Revision: 201003
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|
207 |
{ |
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Revision: 201003
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|
208 |
CFbsFont::TMeasureTextOutput output; |
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Revision: 201003
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|
209 |
TInt width = AdvanceWidthL(aStart, aEnd, aRightToLeft, KMaxTInt, &output); |
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|
210 |
// Add on any protruding side-bearings |
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if (width < output.iBounds.iBr.iX) |
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width = output.iBounds.iBr.iX; |
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if (output.iBounds.iTl.iX < 0) |
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width -= output.iBounds.iTl.iX; |
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return width; |
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216 |
} |
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|
217 |
|
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|
218 |
|
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219 |
/* |
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220 |
Get source text starting at aPos and not more than (aMaxEndChar - aPos) characters. |
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If aFormat is non-null get the format. |
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@param aFont If aFont is not null, on return contains a pointer to an opened CTmTextFontCache* |
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The caller must call Close on aFont when finished with the font. |
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@return Failure condition from getting the font, if any. |
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*/ |
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TInt RTmTextCache::GetText(TInt aPos,TInt aMaxEndChar,TPtrC& aText,TTmCharFormat* aFormat,CTmTextFontCache** aFont) |
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227 |
{ |
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TInt error = KErrNone; |
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if (aPos < iTextStart || aPos >= iTextStart + iTextLength) |
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230 |
{ |
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iTextStart = aPos; |
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iTextBuffer.Zero(); |
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TPtrC p; |
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TTmCharFormat new_format; |
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iSource.GetText(iTextStart,p,new_format); |
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if (!(new_format.iFontSpec == iFormat.iFontSpec)) |
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237 |
{ |
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ReleaseFont(); |
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} |
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iFormat = new_format; |
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iText = p.Ptr(); |
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iTextLength = p.Length(); |
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|
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if (iTextLength == 0) |
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TmPanic(EZeroLengthTextSupplied); |
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245 |
} |
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246 |
int offset = aPos - iTextStart; |
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aText.Set(iText + offset,iTextLength - offset); |
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248 |
if (aText.Length() > aMaxEndChar - aPos) |
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249 |
{ |
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const TText* p = aText.Ptr(); |
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251 |
aText.Set(p,aMaxEndChar - aPos); |
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252 |
} |
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253 |
if (aFormat) |
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*aFormat = iFormat; |
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255 |
if (aFont) |
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|
256 |
{ |
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257 |
if (iFont == NULL) |
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258 |
{ |
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259 |
TFontSpec fs; |
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260 |
iFormat.iFontSpec.GetTFontSpec(fs); |
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|
261 |
CFont *font = NULL; |
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262 |
error = iDevice.GetNearestFontInTwips(font,fs); |
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|
263 |
if (font != NULL) |
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|
264 |
{ |
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265 |
iFont = CTmTextFontCache::New(iDevice, *font); |
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|
266 |
if (iFont == NULL) |
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|
267 |
{ |
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|
268 |
iDevice.ReleaseFont(font); |
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|
269 |
error = KErrNoMemory; |
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|
270 |
} |
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|
271 |
} |
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|
272 |
} |
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273 |
if (iFont && error == KErrNone) |
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|
274 |
{ |
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|
275 |
*aFont = iFont; |
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|
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iFont->Open(); |
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|
277 |
} |
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|
278 |
} |
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|
279 |
return error; |
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|
280 |
} |
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|
281 |
|
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|
282 |
/** Finds the extent of the run of characters that have the same format as |
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283 |
aFormat following aPos, up to aMaxEndChar. |
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|
284 |
@internalComponent */ |
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Revision: 201003
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|
285 |
TInt FollowOnTextEnd(TInt aPos, TInt aMaxEndChar, |
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Revision: 201003
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286 |
const TTmCharFormat& aFormat, MTmSource& aSource, TBool forcedExtend = EFalse) |
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|
287 |
{ |
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Revision: 201003
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288 |
TTmCharFormat format; |
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289 |
TPtrC text; |
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290 |
while (aPos < aMaxEndChar) |
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|
291 |
{ |
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Revision: 201003
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|
292 |
aSource.GetText(aPos, text, format); |
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|
293 |
// The forcedExtend flag is used for only one case that to prevent single ZWJ being |
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294 |
// returned by RTmTextCache::GetTextL. Please see RTmTextCache::GetTextL. |
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|
295 |
if (format != aFormat && !forcedExtend) |
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|
296 |
return aPos; |
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|
297 |
TInt length = text.Length(); |
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|
298 |
if (length == 0) |
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Revision: 201003
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|
299 |
return aPos; |
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Revision: 201003
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|
300 |
if (text[0] == CEditableText::EPictureCharacter) |
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Revision: 201003
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|
301 |
{ |
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Revision: 201003
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|
302 |
return aPos; |
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|
303 |
} |
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Revision: 201003
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|
304 |
aPos += length; |
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Revision: 201003
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diff
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|
305 |
} |
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Revision: 201003
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|
306 |
return aMaxEndChar; |
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|
307 |
} |
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|
308 |
|
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Revision: 201003
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|
309 |
/** Copys the specified text from the source into the buffer. |
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|
310 |
@internalComponent */ |
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Revision: 201003
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|
311 |
void AppendTextToBuffer(TDes& aBuffer, |
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|
312 |
TInt aStart, TInt aEnd, MTmSource& aSource) |
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diff
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|
313 |
{ |
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Revision: 201003
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|
314 |
TTmCharFormat dummy; |
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Revision: 201003
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parents:
diff
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|
315 |
while (aStart != aEnd) |
1fb32624e06b
Revision: 201003
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parents:
diff
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|
316 |
{ |
1fb32624e06b
Revision: 201003
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parents:
diff
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|
317 |
TPtrC text; |
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Revision: 201003
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parents:
diff
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|
318 |
aSource.GetText(aStart, text, dummy); |
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Revision: 201003
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parents:
diff
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|
319 |
TInt textEnd = aStart + text.Length(); |
40 | 320 |
if (aStart >= textEnd) |
321 |
{ |
|
322 |
OstTrace0( TRACE_FATAL, DUP1__APPENDTEXTTOBUFFER, "EZeroLengthTextSupplied" ); |
|
323 |
} |
|
0
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Revision: 201003
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parents:
diff
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|
324 |
__ASSERT_ALWAYS(aStart < textEnd, TmPanic(EZeroLengthTextSupplied)); |
1fb32624e06b
Revision: 201003
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parents:
diff
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|
325 |
if (aEnd < textEnd) |
1fb32624e06b
Revision: 201003
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parents:
diff
changeset
|
326 |
{ |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
327 |
// This run is overlong, so just append all that will fit |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
328 |
aBuffer.Append(&text[0], aEnd - aStart); |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
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|
329 |
return; |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
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|
330 |
} |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
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|
331 |
aBuffer.Append(text); |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
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|
332 |
aStart = textEnd; |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
333 |
} |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
334 |
} |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
335 |
|
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
336 |
/** Same as GetText but will join text together if it has the same format. |
1fb32624e06b
Revision: 201003
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parents:
diff
changeset
|
337 |
@param |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
338 |
aText the text returned. Is valid until the next call of GetText, GetTextL |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
339 |
or Close. |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
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|
340 |
@param aFont If aFont is not null, on return contains a pointer to an opened CTmTextFontCache* |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
341 |
The caller must call Close on aFont when finished with the font. |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
342 |
@internalComponent */ |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
343 |
TInt RTmTextCache::GetTextL(TInt aPos, TInt aMaxEndChar, TPtrC& aText, |
1fb32624e06b
Revision: 201003
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parents:
diff
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|
344 |
TTmCharFormat* aFormat, CTmTextFontCache** aFont) |
1fb32624e06b
Revision: 201003
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parents:
diff
changeset
|
345 |
{ |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
346 |
TInt bufferEnd = iTextBufferStart + iTextBuffer.Length(); |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
347 |
if ( iTextBufferStart <= aPos && aPos < bufferEnd |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
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|
348 |
&& (aMaxEndChar < bufferEnd || iTextBufferEndsInFormatChange) ) |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
349 |
{ |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
350 |
TInt textEnd = Min(bufferEnd, aMaxEndChar); |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
351 |
aText.Set(&iTextBuffer[aPos - iTextBufferStart], textEnd - aPos); |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
352 |
if (aFormat) |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
353 |
*aFormat = iFormat; |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
354 |
if (aFont) |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
355 |
{ |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
356 |
*aFont = iFont; |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
357 |
iFont->Open(); |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
358 |
} |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
359 |
|
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
360 |
return KErrNone; |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
361 |
} |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
362 |
|
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
363 |
TInt error = GetText(aPos, aMaxEndChar, aText, aFormat, aFont); |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
364 |
TBool forcedExtend = EFalse; |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
365 |
const TText* ch = aText.Ptr(); |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
366 |
// When the text is just a ZWJ, the following text should be forced extended, because the ZWJ should |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
367 |
// never be returned as a single text chunk. |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
368 |
if (aText.Length() == 1 && *ch == KZeroWidthJoiner) |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
369 |
forcedExtend = ETrue; |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
370 |
if (error == KErrNone) |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
371 |
{ |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
372 |
CleanupClosePushL(**aFont); |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
373 |
TInt endOfAText = aPos + aText.Length(); |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
374 |
|
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
375 |
TInt end = FollowOnTextEnd(endOfAText, aMaxEndChar, iFormat, iSource, forcedExtend); |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
376 |
if (end != endOfAText) |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
377 |
{ |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
378 |
iTextBuffer.Zero(); |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
379 |
if (iTextBuffer.MaxLength() < end - aPos) |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
380 |
iTextBuffer.ReAllocL(end - aPos); |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
381 |
|
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
382 |
iTextBuffer.Append(aText); |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
383 |
AppendTextToBuffer(iTextBuffer, endOfAText, end, iSource); |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
384 |
iTextBufferStart = aPos; |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
385 |
iTextBufferEndsInFormatChange = end < aMaxEndChar; |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
386 |
aText.Set(iTextBuffer); |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
387 |
} |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
388 |
CleanupStack::Pop(*aFont); |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
389 |
} |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
390 |
return error; |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
391 |
} |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
392 |
|
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
393 |
TBool RTmTextCache::IsArabicPoint(TInt aChar) |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
394 |
{ |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
395 |
return 0x64B <= aChar && aChar < 0x671 |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
396 |
&& !(0x656 <= aChar && aChar < 0x670); |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
397 |
} |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
398 |
|
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
399 |
TUint SupplementaryCharMap(MTmSource *aSource, TText aHigh, TText aLow) |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
400 |
{ |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
401 |
TChar c(aHigh); |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
402 |
if ( IsHighSurrogate( aHigh ) && IsLowSurrogate( aLow )) |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
403 |
c = JoinSurrogates( aHigh, aLow ); |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
404 |
return aSource->Map(c); |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
405 |
} |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
406 |
|
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
407 |
/** |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
408 |
Gets all the displayed text in the range aStart...aEnd and puts it into a |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
409 |
buffer that must be at least aEnd - aStart + 2 characters in length. If |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
410 |
aFormat is non-null gets the format of the first section of text. If aFont |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
411 |
is non-null gets the font for the first section of text. If aDirectionality |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
412 |
is EVisualRightToLeft reverses the text and mirrors appropriate characters. |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
413 |
Adds a zero-width joiner to the start and/or end of the text returned if |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
414 |
these are necessary for the correct contextual glyph choice. Adds a |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
415 |
0xFFFF to each end if this is not required. |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
416 |
@param aFont If aFont is not null, on return contains a pointer to an opened CTmTextFontCache* |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
417 |
The caller must call Close on aFont when finished with the font. |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
418 |
@return Failure condition on getting font, if any. |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
419 |
@internalComponent |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
420 |
*/ |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
421 |
TInt RTmTextCache::GetDisplayedText(TInt aStart, TInt aEnd, |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
422 |
TDisplayedTextDirectionality aDirectionality, TText* aBuffer,TUint aContextChar, |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
423 |
TTmCharFormat* aFormat, CTmTextFontCache** aFont) |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
424 |
{ |
40 | 425 |
if (aStart > aEnd) |
426 |
{ |
|
427 |
OstTrace0( TRACE_DUMP, RTMTEXTCACHE_GETDISPLAYEDTEXT, "EBadArg" ); |
|
428 |
} |
|
0
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
429 |
__ASSERT_DEBUG(aStart <= aEnd, TmPanic(EBadArg)); |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
430 |
if (aContextChar == 0) |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
431 |
aBuffer[0] = 0xFFFF; |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
432 |
else |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
433 |
aBuffer[0] = aContextChar; |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
434 |
if (aEnd == aStart) |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
435 |
return KErrGeneral; |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
436 |
TPtrC text; |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
437 |
TText* output = aBuffer; |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
438 |
TTmCharFormat format; |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
439 |
|
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
440 |
// might the (logically) first character join with the previous one? |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
441 |
GetText(aStart, aStart + 1, text, &format); |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
442 |
if (aFormat) |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
443 |
*aFormat = format; |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
444 |
TInt c = iSource.Map(text[0]); |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
445 |
if (IsHighSurrogate(text[0])) |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
446 |
{ |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
447 |
GetText(aStart, aStart + 2, text, &format); |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
448 |
if (aFormat) |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
449 |
*aFormat = format; |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
450 |
if (text.Length() >= 2) |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
451 |
{ |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
452 |
if (IsLowSurrogate(text[1])) |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
453 |
{ |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
454 |
c = SupplementaryCharMap(&iSource, text[0], text[1]); |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
455 |
} |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
456 |
else |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
457 |
{ |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
458 |
c = iSource.Map(text[0]); |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
459 |
} |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
460 |
} |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
461 |
} |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
462 |
|
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
463 |
if (0 < aStart && CFont::CharactersJoin( |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
464 |
aDirectionality == ELeftToRight? KZeroWidthJoiner : c, |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
465 |
aDirectionality == ELeftToRight? c : KZeroWidthJoiner)) |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
466 |
{ |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
467 |
TInt prev = aStart - 1; |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
468 |
TTmCharFormat prevFormat; |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
469 |
GetText(prev, aStart, text, &prevFormat); |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
470 |
TInt prevChar = iSource.Map(text[0]); |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
471 |
while (0 < prev && IsArabicPoint(prevChar)) |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
472 |
{ |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
473 |
GetText(--prev, aStart, text, &prevFormat); |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
474 |
prevChar = iSource.Map(text[0]); |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
475 |
} |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
476 |
if (CFont::CharactersJoin( |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
477 |
aDirectionality == ELeftToRight? prevChar : c, |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
478 |
aDirectionality == ELeftToRight? c : prevChar) |
40 | 479 |
&& format == prevFormat) |
0
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
480 |
// Characters join at the beginning. |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
481 |
*output = KZeroWidthJoiner; |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
482 |
} |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
483 |
|
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
484 |
output = aBuffer + 1; |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
485 |
TInt error = KErrNone; |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
486 |
while (aStart < aEnd) |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
487 |
{ |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
488 |
TInt currentError = GetText(aStart, aEnd, text, &format, aFont); |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
489 |
// do not have to push aFont onto clean-up stack because this is a non-leaving method |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
490 |
if (aFont) |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
491 |
error = currentError; |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
492 |
aFont = NULL; |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
493 |
TInt length = text.Length(); |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
494 |
aStart += length; |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
495 |
const TText* input = text.Ptr(); |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
496 |
const TText* end = input + length; |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
497 |
while (input < end) |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
498 |
{ |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
499 |
if (IsHighSurrogate(*input)) |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
500 |
{ |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
501 |
if (input+1 < end && IsLowSurrogate(input[1])) |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
502 |
{ |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
503 |
c = SupplementaryCharMap(&iSource, input[0], input[1]); |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
504 |
input++; |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
505 |
input++; |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
506 |
*output++ = GetHighSurrogate( c ); |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
507 |
*output++ = GetLowSurrogate( c ); |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
508 |
} |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
509 |
else |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
510 |
{ |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
511 |
c = iSource.Map(input[0]); |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
512 |
input++; |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
513 |
*output++ = static_cast<TText>(c); |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
514 |
} |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
515 |
} |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
516 |
else if (IsLowSurrogate(*input)) |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
517 |
{ |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
518 |
c = iSource.Map(input[0]); |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
519 |
input++; |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
520 |
*output++ = static_cast<TText>(c); |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
521 |
} |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
522 |
else |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
523 |
{ |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
524 |
c = iSource.Map(*input++); |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
525 |
*output++ = static_cast<TText>(c); |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
526 |
} |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
527 |
} |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
528 |
} |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
529 |
|
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
530 |
*output = 0xFFFF; |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
531 |
// might the (logically) last character join with the next one? |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
532 |
if (aStart < iSource.DocumentLength()) |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
533 |
{ |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
534 |
const TText* prev = output; |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
535 |
while (--prev != aBuffer && IsArabicPoint(*prev)) {} |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
536 |
if (CFont::CharactersJoin( |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
537 |
aDirectionality == ELeftToRight? *prev : KZeroWidthJoiner, |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
538 |
aDirectionality == ELeftToRight? KZeroWidthJoiner : *prev)) |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
539 |
{ |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
540 |
TTmCharFormat nextFormat; |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
541 |
GetText(aStart, aStart + 1, text, &nextFormat); |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
542 |
TInt nextChar = iSource.Map(text[0]); |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
543 |
if (CFont::CharactersJoin( |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
544 |
aDirectionality == ELeftToRight? *prev : nextChar, |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
545 |
aDirectionality == ELeftToRight? nextChar : *prev) |
40 | 546 |
&& format == nextFormat) |
0
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
547 |
// Characters join at the end. |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
548 |
*output = KZeroWidthJoiner; |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
549 |
} |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
550 |
} |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
551 |
|
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
552 |
if (aDirectionality == EVisualRightToLeft) |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
553 |
TBidirectionalState::ReverseGroups(aBuffer, output + 1 - aBuffer); |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
554 |
|
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
555 |
return error; |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
556 |
} |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
557 |
|
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
558 |
void RTmTextCache::SetContextChar(TUint aContextChar) |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
559 |
{ |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
560 |
iContextCharPerChunk = aContextChar; |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
561 |
} |
1fb32624e06b
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
562 |