1 /* 2 * Copyright (C) Research In Motion Limited 2010. All rights reserved. 3 * 4 * This library is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU Library General Public 6 * License as published by the Free Software Foundation; either 7 * version 2 of the License, or (at your option) any later version. 8 * 9 * This library is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 * Library General Public License for more details. 13 * 14 * You should have received a copy of the GNU Library General Public License 15 * along with this library; see the file COPYING.LIB. If not, write to 16 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 17 * Boston, MA 02110-1301, USA. 18 */ 19 20 #ifndef SVGTextChunkBuilder_h 21 #define SVGTextChunkBuilder_h 22 23 #if ENABLE(SVG) 24 #include "SVGTextChunk.h" 25 #include <wtf/Vector.h> 26 27 namespace WebCore { 28 29 class SVGInlineTextBox; 30 struct SVGTextFragment; 31 32 // SVGTextChunkBuilder performs the third layout phase for SVG text. 33 // 34 // Phase one built the layout information from the SVG DOM stored in the RenderSVGInlineText objects (SVGTextLayoutAttributes). 35 // Phase two performed the actual per-character layout, computing the final positions for each character, stored in the SVGInlineTextBox objects (SVGTextFragment). 36 // Phase three performs all modifications that have to be applied to each individual text chunk (text-anchor & textLength). 37 38 class SVGTextChunkBuilder { 39 WTF_MAKE_NONCOPYABLE(SVGTextChunkBuilder); 40 public: 41 SVGTextChunkBuilder(); 42 textChunks()43 const Vector<SVGTextChunk>& textChunks() const { return m_textChunks; } 44 void transformationForTextBox(SVGInlineTextBox*, AffineTransform&) const; 45 46 void buildTextChunks(Vector<SVGInlineTextBox*>& lineLayoutBoxes); 47 void layoutTextChunks(Vector<SVGInlineTextBox*>& lineLayoutBoxes); 48 49 private: 50 void addTextChunk(Vector<SVGInlineTextBox*>& lineLayoutBoxes, unsigned boxPosition, unsigned boxCount); 51 void processTextChunk(const SVGTextChunk&); 52 53 void processTextLengthSpacingCorrection(bool isVerticalText, float textLengthShift, Vector<SVGTextFragment>&, unsigned& atCharacter); 54 void processTextAnchorCorrection(bool isVerticalText, float textAnchorShift, Vector<SVGTextFragment>&); 55 void buildSpacingAndGlyphsTransform(bool isVerticalText, float scale, const SVGTextFragment&, AffineTransform&); 56 57 private: 58 Vector<SVGTextChunk> m_textChunks; 59 HashMap<SVGInlineTextBox*, AffineTransform> m_textBoxTransformations; 60 }; 61 62 } // namespace WebCore 63 64 #endif // ENABLE(SVG) 65 #endif 66