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 #include "core/rendering/svg/SVGTextChunk.h" 24 #include "wtf/Vector.h" 25 26 namespace blink { 27 28 class SVGInlineTextBox; 29 struct SVGTextFragment; 30 31 // SVGTextChunkBuilder performs the third layout phase for SVG text. 32 // 33 // Phase one built the layout information from the SVG DOM stored in the RenderSVGInlineText objects (SVGTextLayoutAttributes). 34 // Phase two performed the actual per-character layout, computing the final positions for each character, stored in the SVGInlineTextBox objects (SVGTextFragment). 35 // Phase three performs all modifications that have to be applied to each individual text chunk (text-anchor & textLength). 36 37 class SVGTextChunkBuilder { 38 WTF_MAKE_NONCOPYABLE(SVGTextChunkBuilder); 39 public: 40 SVGTextChunkBuilder(); 41 42 const Vector<SVGTextChunk>& textChunks() const { return m_textChunks; } 43 AffineTransform transformationForTextBox(SVGInlineTextBox*) const; 44 45 void buildTextChunks(Vector<SVGInlineTextBox*>& lineLayoutBoxes); 46 void layoutTextChunks(Vector<SVGInlineTextBox*>& lineLayoutBoxes); 47 48 private: 49 void addTextChunk(Vector<SVGInlineTextBox*>& lineLayoutBoxes, unsigned boxPosition, unsigned boxCount); 50 void processTextChunk(const SVGTextChunk&); 51 52 void processTextLengthSpacingCorrection(bool isVerticalText, float textLengthShift, Vector<SVGTextFragment>&, unsigned& atCharacter); 53 void processTextAnchorCorrection(bool isVerticalText, float textAnchorShift, Vector<SVGTextFragment>&); 54 55 private: 56 Vector<SVGTextChunk> m_textChunks; 57 HashMap<SVGInlineTextBox*, AffineTransform> m_textBoxTransformations; 58 }; 59 60 } // namespace blink 61 62 #endif 63
