1/*
2 * Copyright (C) Research In Motion Limited 2010. All rights reserved.
3 *
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.
8 *
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.
13 *
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.
18 */
19
20#ifndef SVGTextLayoutEngineSpacing_h
21#define SVGTextLayoutEngineSpacing_h
22
23#include "SVGTextMetrics.h"
24
25namespace WebCore {
26
27class Font;
28class SVGRenderStyle;
29class SVGElement;
30
31// Helper class used by SVGTextLayoutEngine to handle 'kerning' / 'letter-spacing' and 'word-spacing'.
32class SVGTextLayoutEngineSpacing {
33    WTF_MAKE_NONCOPYABLE(SVGTextLayoutEngineSpacing);
34public:
35    SVGTextLayoutEngineSpacing(const Font&);
36
37    float calculateSVGKerning(bool isVerticalText, const SVGTextMetrics::Glyph& currentGlyph);
38    float calculateCSSKerningAndSpacing(const SVGRenderStyle*, SVGElement* lengthContext, const UChar* currentCharacter);
39
40private:
41    const Font& m_font;
42    const UChar* m_lastCharacter;
43
44#if ENABLE(SVG_FONTS)
45    SVGTextMetrics::Glyph m_lastGlyph;
46#endif
47};
48
49} // namespace WebCore
50
51#endif
52