/*
* Copyright (C) Research In Motion Limited 2010. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifndef SVGTextChunkBuilder_h
#define SVGTextChunkBuilder_h
#include "core/rendering/svg/SVGTextChunk.h"
#include "wtf/Vector.h"
namespace WebCore {
class SVGInlineTextBox;
struct SVGTextFragment;
// SVGTextChunkBuilder performs the third layout phase for SVG text.
//
// Phase one built the layout information from the SVG DOM stored in the RenderSVGInlineText objects (SVGTextLayoutAttributes).
// Phase two performed the actual per-character layout, computing the final positions for each character, stored in the SVGInlineTextBox objects (SVGTextFragment).
// Phase three performs all modifications that have to be applied to each individual text chunk (text-anchor & textLength).
class SVGTextChunkBuilder {
WTF_MAKE_NONCOPYABLE(SVGTextChunkBuilder);
public:
SVGTextChunkBuilder();
const Vector<SVGTextChunk>& textChunks() const { return m_textChunks; }
void transformationForTextBox(SVGInlineTextBox*, AffineTransform&) const;
void buildTextChunks(Vector<SVGInlineTextBox*>& lineLayoutBoxes);
void layoutTextChunks(Vector<SVGInlineTextBox*>& lineLayoutBoxes);
private:
void addTextChunk(Vector<SVGInlineTextBox*>& lineLayoutBoxes, unsigned boxPosition, unsigned boxCount);
void processTextChunk(const SVGTextChunk&);
void processTextLengthSpacingCorrection(bool isVerticalText, float textLengthShift, Vector<SVGTextFragment>&, unsigned& atCharacter);
void processTextAnchorCorrection(bool isVerticalText, float textAnchorShift, Vector<SVGTextFragment>&);
void buildSpacingAndGlyphsTransform(bool isVerticalText, float scale, const SVGTextFragment&, AffineTransform&);
private:
Vector<SVGTextChunk> m_textChunks;
HashMap<SVGInlineTextBox*, AffineTransform> m_textBoxTransformations;
};
} // namespace WebCore
#endif