2 * Copyright (C) Research In Motion Limited 2010. All rights reserved.
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.
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.
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.
20 #ifndef SVGTextChunkBuilder_h
21 #define SVGTextChunkBuilder_h
23 #include "core/rendering/svg/SVGTextChunk.h"
24 #include "wtf/Vector.h"
28 class SVGInlineTextBox;
29 struct SVGTextFragment;
31 // SVGTextChunkBuilder performs the third layout phase for SVG text.
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).
37 class SVGTextChunkBuilder {
38 WTF_MAKE_NONCOPYABLE(SVGTextChunkBuilder);
40 SVGTextChunkBuilder();
42 const Vector<SVGTextChunk>& textChunks() const { return m_textChunks; }
43 AffineTransform transformationForTextBox(SVGInlineTextBox*) const;
45 void buildTextChunks(Vector<SVGInlineTextBox*>& lineLayoutBoxes);
46 void layoutTextChunks(Vector<SVGInlineTextBox*>& lineLayoutBoxes);
49 void addTextChunk(Vector<SVGInlineTextBox*>& lineLayoutBoxes, unsigned boxPosition, unsigned boxCount);
50 void processTextChunk(const SVGTextChunk&);
52 void processTextLengthSpacingCorrection(bool isVerticalText, float textLengthShift, Vector<SVGTextFragment>&, unsigned& atCharacter);
53 void processTextAnchorCorrection(bool isVerticalText, float textAnchorShift, Vector<SVGTextFragment>&);
56 Vector<SVGTextChunk> m_textChunks;
57 HashMap<SVGInlineTextBox*, AffineTransform> m_textBoxTransformations;