/*
* 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 SVGTextLayoutEngineBaseline_h
#define SVGTextLayoutEngineBaseline_h
#include "core/rendering/style/SVGRenderStyleDefs.h"
#include "wtf/Noncopyable.h"
namespace WebCore {
class Font;
class RenderObject;
class SVGElement;
class SVGRenderStyle;
class SVGTextMetrics;
// Helper class used by SVGTextLayoutEngine to handle 'alignment-baseline' / 'dominant-baseline' and 'baseline-shift'.
class SVGTextLayoutEngineBaseline {
WTF_MAKE_NONCOPYABLE(SVGTextLayoutEngineBaseline);
public:
SVGTextLayoutEngineBaseline(const Font&);
float calculateBaselineShift(const SVGRenderStyle*, SVGElement* lengthContext) const;
float calculateAlignmentBaselineShift(bool isVerticalText, const RenderObject* textRenderer) const;
float calculateGlyphOrientationAngle(bool isVerticalText, const SVGRenderStyle*, const UChar& character) const;
float calculateGlyphAdvanceAndOrientation(bool isVerticalText, SVGTextMetrics&, float angle, float& xOrientationShift, float& yOrientationShift) const;
private:
EAlignmentBaseline dominantBaselineToAlignmentBaseline(bool isVerticalText, const RenderObject* textRenderer) const;
const Font& m_font;
};
} // namespace WebCore
#endif