51 lines
1.9 KiB
C++
51 lines
1.9 KiB
C++
/*
|
|
* 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.
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include "SVGRenderStyleDefs.h"
|
|
#include <wtf/Noncopyable.h>
|
|
|
|
namespace WebCore {
|
|
|
|
class FontCascade;
|
|
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 FontCascade&);
|
|
|
|
float calculateBaselineShift(const SVGRenderStyle&, SVGElement* context) 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:
|
|
AlignmentBaseline dominantBaselineToAlignmentBaseline(bool isVerticalText, const RenderObject* textRenderer) const;
|
|
|
|
const FontCascade& m_font;
|
|
};
|
|
|
|
} // namespace WebCore
|