author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Mon, 04 Oct 2010 01:32:07 +0300 | |
changeset 2 | 303757a437d3 |
parent 0 | 4f2f89ce4247 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (C) 2006 Oliver Hunt <ojh16@student.canterbury.ac.nz> |
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* (C) 2006 Apple Computer Inc. |
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* (C) 2007 Nikolas Zimmermann <zimmermann@kde.org> |
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* Copyright (C) Research In Motion Limited 2010. All rights reserved. |
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* |
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* This library is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Library General Public |
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* License as published by the Free Software Foundation; either |
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* version 2 of the License, or (at your option) any later version. |
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* |
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* This library is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Library General Public License for more details. |
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* |
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* You should have received a copy of the GNU Library General Public License |
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* along with this library; see the file COPYING.LIB. If not, write to |
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* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
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* Boston, MA 02110-1301, USA. |
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* |
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*/ |
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#include "config.h" |
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#include "SVGRootInlineBox.h" |
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#if ENABLE(SVG) |
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#include "GraphicsContext.h" |
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#include "RenderBlock.h" |
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#include "SVGInlineFlowBox.h" |
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#include "SVGInlineTextBox.h" |
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#include "SVGRenderSupport.h" |
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#include "SVGTextLayoutUtilities.h" |
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#include "SVGTextPositioningElement.h" |
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// Text chunk part propagation can be traced by setting this variable > 0. |
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#define DEBUG_CHUNK_PART_PROPAGATION 0 |
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namespace WebCore { |
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void SVGRootInlineBox::paint(PaintInfo& paintInfo, int, int) |
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{ |
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ASSERT(paintInfo.phase == PaintPhaseForeground || paintInfo.phase == PaintPhaseSelection); |
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ASSERT(!paintInfo.context->paintingDisabled()); |
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RenderObject* boxRenderer = renderer(); |
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ASSERT(boxRenderer); |
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PaintInfo childPaintInfo(paintInfo); |
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childPaintInfo.context->save(); |
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if (SVGRenderSupport::prepareToRenderSVGContent(boxRenderer, childPaintInfo)) { |
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for (InlineBox* child = firstChild(); child; child = child->nextOnLine()) |
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child->paint(childPaintInfo, 0, 0); |
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} |
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SVGRenderSupport::finishRenderSVGContent(boxRenderer, childPaintInfo, paintInfo.context); |
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childPaintInfo.context->restore(); |
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} |
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void SVGRootInlineBox::computePerCharacterLayoutInformation() |
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{ |
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// Clean up any previous layout information |
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m_svgChars.clear(); |
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m_svgTextChunks.clear(); |
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// Build layout information for all contained render objects |
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SVGCharacterLayoutInfo charInfo; |
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buildLayoutInformation(this, charInfo); |
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m_svgChars = charInfo.svgChars; |
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// Now all layout information are available for every character |
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// contained in any of our child inline/flow boxes. Build list |
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// of text chunks now, to be able to apply text-anchor shifts. |
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SVGTextChunkLayoutInfo chunkInfo; |
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chunkInfo.buildTextChunks(m_svgChars.begin(), m_svgChars.end(), this); |
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// Layout all text chunks |
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// text-anchor needs to be applied to individual chunks. |
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chunkInfo.layoutTextChunks(); |
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m_svgTextChunks = chunkInfo.textChunks(); |
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// Propagate text chunk part information to all SVGInlineTextBoxes, see SVGTextChunkLayoutInfo.h for details |
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propagateTextChunkPartInformation(); |
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// Layout all child boxes. |
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layoutChildBoxes(this); |
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// Resize our root box and our RenderSVGText parent block |
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layoutRootBox(); |
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} |
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void SVGRootInlineBox::buildLayoutInformation(InlineFlowBox* start, SVGCharacterLayoutInfo& info) |
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{ |
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if (start->isRootInlineBox()) { |
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ASSERT(start->renderer()->node()->hasTagName(SVGNames::textTag)); |
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SVGTextPositioningElement* positioningElement = static_cast<SVGTextPositioningElement*>(start->renderer()->node()); |
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ASSERT(positioningElement); |
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ASSERT(positioningElement->parentNode()); |
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102 |
info.addLayoutInformation(positioningElement); |
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103 |
} |
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|
104 |
|
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105 |
SVGLastGlyphInfo lastGlyph; |
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|
106 |
|
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107 |
for (InlineBox* curr = start->firstChild(); curr; curr = curr->nextOnLine()) { |
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108 |
if (curr->renderer()->isText()) |
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109 |
static_cast<SVGInlineTextBox*>(curr)->buildLayoutInformation(info, lastGlyph); |
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110 |
else { |
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111 |
ASSERT(curr->isInlineFlowBox()); |
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InlineFlowBox* flowBox = static_cast<InlineFlowBox*>(curr); |
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113 |
|
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114 |
// Skip generated content. |
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if (!flowBox->renderer()->node()) |
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116 |
continue; |
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117 |
|
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118 |
bool isAnchor = flowBox->renderer()->node()->hasTagName(SVGNames::aTag); |
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bool isTextPath = flowBox->renderer()->node()->hasTagName(SVGNames::textPathTag); |
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120 |
|
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121 |
if (!isTextPath && !isAnchor) { |
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122 |
SVGTextPositioningElement* positioningElement = static_cast<SVGTextPositioningElement*>(flowBox->renderer()->node()); |
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123 |
ASSERT(positioningElement); |
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124 |
ASSERT(positioningElement->parentNode()); |
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125 |
|
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126 |
info.addLayoutInformation(positioningElement); |
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} else if (!isAnchor) { |
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info.setInPathLayout(true); |
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129 |
|
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130 |
// Handle text-anchor/textLength on path, which is special. |
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131 |
SVGTextContentElement* textContent = 0; |
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Node* node = flowBox->renderer()->node(); |
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133 |
if (node && node->isSVGElement()) |
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textContent = static_cast<SVGTextContentElement*>(node); |
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135 |
ASSERT(textContent); |
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136 |
|
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ELengthAdjust lengthAdjust = (ELengthAdjust) textContent->lengthAdjust(); |
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138 |
ETextAnchor anchor = flowBox->renderer()->style()->svgStyle()->textAnchor(); |
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139 |
float textAnchorStartOffset = 0.0f; |
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140 |
|
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141 |
// Initialize sub-layout. We need to create text chunks from the textPath |
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142 |
// children using our standard layout code, to be able to measure the |
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143 |
// text length using our normal methods and not textPath specific hacks. |
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144 |
Vector<SVGTextChunk> tempChunks; |
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145 |
|
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146 |
SVGCharacterLayoutInfo tempCharInfo; |
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147 |
buildLayoutInformation(flowBox, tempCharInfo); |
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148 |
|
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149 |
SVGTextChunkLayoutInfo tempChunkInfo; |
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150 |
tempChunkInfo.buildTextChunks(tempCharInfo.svgChars.begin(), tempCharInfo.svgChars.end(), flowBox); |
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151 |
tempChunks = tempChunkInfo.textChunks(); |
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152 |
|
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Vector<SVGTextChunk>::iterator it = tempChunks.begin(); |
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Vector<SVGTextChunk>::iterator end = tempChunks.end(); |
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155 |
|
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float computedLength = 0.0f; |
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157 |
|
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158 |
for (; it != end; ++it) { |
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SVGTextChunk& chunk = *it; |
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160 |
|
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161 |
// Apply text-length calculation |
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162 |
info.pathExtraAdvance += calculateTextLengthCorrectionForTextChunk(chunk, lengthAdjust, computedLength); |
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|
163 |
|
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164 |
if (lengthAdjust == SVGTextContentElement::LENGTHADJUST_SPACINGANDGLYPHS) { |
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165 |
info.pathTextLength += computedLength; |
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166 |
info.pathChunkLength += chunk.textLength; |
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|
167 |
} |
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|
168 |
|
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169 |
// Calculate text-anchor start offset |
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170 |
if (anchor == TA_START) |
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171 |
continue; |
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|
172 |
|
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173 |
textAnchorStartOffset += calculateTextAnchorShiftForTextChunk(chunk, anchor); |
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174 |
} |
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|
175 |
|
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176 |
info.addLayoutInformation(flowBox, textAnchorStartOffset); |
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|
177 |
} |
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|
178 |
|
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179 |
float shiftxSaved = info.shiftx; |
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float shiftySaved = info.shifty; |
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|
181 |
|
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182 |
buildLayoutInformation(flowBox, info); |
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183 |
info.processedChunk(shiftxSaved, shiftySaved); |
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|
184 |
|
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185 |
if (isTextPath) |
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186 |
info.setInPathLayout(false); |
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|
187 |
} |
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|
188 |
} |
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189 |
} |
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|
190 |
|
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191 |
void SVGRootInlineBox::layoutChildBoxes(InlineFlowBox* start) |
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192 |
{ |
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for (InlineBox* child = start->firstChild(); child; child = child->nextOnLine()) { |
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194 |
if (child->renderer()->isText()) { |
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195 |
SVGInlineTextBox* textBox = static_cast<SVGInlineTextBox*>(child); |
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196 |
IntRect boxRect = textBox->calculateBoundaries(); |
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197 |
textBox->setX(boxRect.x()); |
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198 |
textBox->setY(boxRect.y()); |
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199 |
textBox->setWidth(boxRect.width()); |
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200 |
textBox->setHeight(boxRect.height()); |
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201 |
} else { |
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202 |
ASSERT(child->isInlineFlowBox()); |
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|
203 |
|
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204 |
// Skip generated content. |
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if (!child->renderer()->node()) |
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continue; |
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|
207 |
|
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SVGInlineFlowBox* flowBox = static_cast<SVGInlineFlowBox*>(child); |
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layoutChildBoxes(flowBox); |
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|
210 |
|
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IntRect boxRect = flowBox->calculateBoundaries(); |
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flowBox->setX(boxRect.x()); |
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flowBox->setY(boxRect.y()); |
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flowBox->setWidth(boxRect.width()); |
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flowBox->setHeight(boxRect.height()); |
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} |
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217 |
} |
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218 |
} |
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|
219 |
|
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void SVGRootInlineBox::layoutRootBox() |
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221 |
{ |
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RenderBlock* parentBlock = block(); |
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ASSERT(parentBlock); |
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224 |
|
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IntRect childRect; |
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for (InlineBox* child = firstChild(); child; child = child->nextOnLine()) { |
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227 |
// Skip generated content. |
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if (!child->renderer()->node()) |
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continue; |
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childRect.unite(child->calculateBoundaries()); |
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231 |
} |
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|
232 |
|
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int xBlock = childRect.x(); |
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int yBlock = childRect.y(); |
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int widthBlock = childRect.width(); |
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int heightBlock = childRect.height(); |
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237 |
|
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// Finally, assign the root block position, now that all content is laid out. |
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parentBlock->setLocation(xBlock, yBlock); |
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parentBlock->setWidth(widthBlock); |
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parentBlock->setHeight(heightBlock); |
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|
242 |
|
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243 |
// Position all children relative to the parent block. |
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for (InlineBox* child = firstChild(); child; child = child->nextOnLine()) { |
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245 |
// Skip generated content. |
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246 |
if (!child->renderer()->node()) |
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|
247 |
continue; |
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child->adjustPosition(-xBlock, -yBlock); |
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|
249 |
} |
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|
250 |
|
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251 |
// Position ourselves. |
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setX(0); |
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setY(0); |
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setWidth(widthBlock); |
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setHeight(heightBlock); |
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setBlockHeight(heightBlock); |
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setLineTopBottomPositions(0, heightBlock); |
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258 |
} |
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|
259 |
|
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260 |
void SVGRootInlineBox::propagateTextChunkPartInformation() |
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|
261 |
{ |
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#if DEBUG_CHUNK_PART_PROPAGATION > 0 |
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ListHashSet<SVGInlineTextBox*> boxes; |
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|
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#endif |
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|
265 |
|
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|
266 |
// Loop through all text chunks |
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const Vector<SVGTextChunk>::const_iterator end = m_svgTextChunks.end(); |
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|
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for (Vector<SVGTextChunk>::const_iterator it = m_svgTextChunks.begin(); it != end; ++it) { |
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const SVGTextChunk& chunk = *it; |
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int processedChunkCharacters = 0; |
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|
271 |
|
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272 |
// Loop through all ranges contained in this chunk |
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const Vector<SVGInlineBoxCharacterRange>::const_iterator boxEnd = chunk.boxes.end(); |
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|
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for (Vector<SVGInlineBoxCharacterRange>::const_iterator boxIt = chunk.boxes.begin(); boxIt != boxEnd; ++boxIt) { |
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|
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const SVGInlineBoxCharacterRange& range = *boxIt; |
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|
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ASSERT(range.box->isSVGInlineTextBox()); |
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|
277 |
|
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|
278 |
// Access style & font information of this text box |
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|
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SVGInlineTextBox* rangeTextBox = static_cast<SVGInlineTextBox*>(range.box); |
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|
280 |
rangeTextBox->setChunkTransformation(chunk.ctm); |
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|
281 |
|
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|
282 |
RenderText* text = rangeTextBox->textRenderer(); |
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Revision: 201037
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|
283 |
ASSERT(text); |
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|
284 |
|
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|
285 |
RenderStyle* style = text->style(); |
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Revision: 201037
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|
286 |
ASSERT(style); |
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|
287 |
|
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|
288 |
const Font& font = style->font(); |
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|
289 |
|
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Revision: 201037
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|
290 |
// Figure out first and last character of this range in this chunk |
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|
291 |
int rangeLength = range.endOffset - range.startOffset; |
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Revision: 201037
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|
292 |
Vector<SVGChar>::iterator itCharBegin = chunk.start + processedChunkCharacters; |
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|
293 |
Vector<SVGChar>::iterator itCharEnd = chunk.start + processedChunkCharacters + rangeLength; |
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|
294 |
ASSERT(itCharEnd <= chunk.end); |
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|
295 |
|
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Revision: 201037
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|
296 |
// Loop through all characters in range |
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|
297 |
int processedRangeCharacters = 0; |
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Revision: 201037
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|
298 |
for (Vector<SVGChar>::iterator itChar = itCharBegin; itChar != itCharEnd; ++itChar) { |
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Revision: 201037
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|
299 |
if (itChar->isHidden()) { |
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Revision: 201037
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|
300 |
++processedRangeCharacters; |
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Revision: 201037
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|
301 |
continue; |
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|
302 |
} |
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diff
changeset
|
303 |
|
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Revision: 201037
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diff
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|
304 |
// Determine how many characters - starting from the current - can be drawn at once. |
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Revision: 201037
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diff
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|
305 |
Vector<SVGChar>::iterator itSearch = itChar + 1; |
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Revision: 201037
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|
306 |
while (itSearch != itCharEnd) { |
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if (itSearch->drawnSeperated || itSearch->isHidden()) |
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break; |
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|
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++itSearch; |
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} |
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|
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// Calculate text chunk part information for this chunk sub-range |
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const UChar* partStart = text->characters() + rangeTextBox->start() + range.startOffset + processedRangeCharacters; |
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|
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SVGTextChunkPart part; |
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part.firstCharacter = itChar; |
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part.length = itSearch - itChar; |
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part.width = font.floatWidth(svgTextRunForInlineTextBox(partStart, part.length, style, rangeTextBox)); |
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part.height = font.height(); |
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part.offset = range.startOffset + processedRangeCharacters; |
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rangeTextBox->addChunkPartInformation(part); |
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processedRangeCharacters += part.length; |
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|
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// Skip processed characters |
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itChar = itSearch - 1; |
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} |
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|
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ASSERT(processedRangeCharacters == rangeLength); |
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processedChunkCharacters += rangeLength; |
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|
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#if DEBUG_CHUNK_PART_PROPAGATION > 0 |
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boxes.add(rangeTextBox); |
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#endif |
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} |
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} |
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|
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#if DEBUG_CHUNK_PART_PROPAGATION > 0 |
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{ |
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fprintf(stderr, "Propagated text chunk part information:\n"); |
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|
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ListHashSet<SVGInlineTextBox*>::const_iterator it = boxes.begin(); |
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const ListHashSet<SVGInlineTextBox*>::const_iterator end = boxes.end(); |
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|
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for (; it != end; ++it) { |
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const SVGInlineTextBox* box = *it; |
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const Vector<SVGTextChunkPart>& parts = box->svgTextChunkParts(); |
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|
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fprintf(stderr, " Box %p contains %i text chunk parts:\n", box, static_cast<int>(parts.size())); |
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Vector<SVGTextChunkPart>::const_iterator partIt = parts.begin(); |
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const Vector<SVGTextChunkPart>::const_iterator partEnd = parts.end(); |
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for (; partIt != partEnd; ++partIt) { |
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const SVGTextChunkPart& part = *partIt; |
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fprintf(stderr, " -> firstCharacter x=%lf, y=%lf, offset=%i, length=%i, width=%lf, height=%lf, textRenderer=%p\n" |
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, part.firstCharacter->x, part.firstCharacter->y, part.offset, part.length, part.width, part.height, box->textRenderer()); |
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} |
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} |
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} |
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#endif |
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} |
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|
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} // namespace WebCore |
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|
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#endif // ENABLE(SVG) |