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
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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 SVGTextLayoutEngineBaseline_h
21 #define SVGTextLayoutEngineBaseline_h
23 #include "core/rendering/style/SVGRenderStyleDefs.h"
24 #include "wtf/Noncopyable.h"
34 // Helper class used by SVGTextLayoutEngine to handle 'alignment-baseline' / 'dominant-baseline' and 'baseline-shift'.
35 class SVGTextLayoutEngineBaseline {
36 WTF_MAKE_NONCOPYABLE(SVGTextLayoutEngineBaseline);
38 SVGTextLayoutEngineBaseline(const Font&);
40 float calculateBaselineShift(const SVGRenderStyle&, SVGElement* lengthContext) const;
41 float calculateAlignmentBaselineShift(bool isVerticalText, const RenderObject* textRenderer) const;
42 float calculateGlyphOrientationAngle(bool isVerticalText, const SVGRenderStyle&, const UChar& character) const;
43 float calculateGlyphAdvanceAndOrientation(bool isVerticalText, const SVGTextMetrics&, float angle, float& xOrientationShift, float& yOrientationShift) const;
46 EAlignmentBaseline dominantBaselineToAlignmentBaseline(bool isVerticalText, const RenderObject* textRenderer) const;