1/*
2 * Copyright (C) 2007 Eric Seidel <eric@webkit.org>
3 * Copyright (C) 2007 Nikolas Zimmermann <zimmermann@kde.org>
4 * Copyright (C) Research In Motion Limited 2010. All rights reserved.
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Library General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
10 *
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14 * Library General Public License for more details.
15 *
16 * You should have received a copy of the GNU Library General Public License
17 * along with this library; see the file COPYING.LIB.  If not, write to
18 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
19 * Boston, MA 02110-1301, USA.
20 */
21
22#ifndef SVGFontElement_h
23#define SVGFontElement_h
24
25#if ENABLE(SVG_FONTS)
26#include "SVGNames.h"
27#include "core/svg/SVGAnimatedBoolean.h"
28#include "core/svg/SVGElement.h"
29#include "core/svg/SVGExternalResourcesRequired.h"
30#include "core/svg/SVGGlyphMap.h"
31#include "core/svg/SVGParserUtilities.h"
32
33namespace WebCore {
34
35// Describe an SVG <hkern>/<vkern> element
36struct SVGKerningPair {
37    float kerning;
38    UnicodeRanges unicodeRange1;
39    UnicodeRanges unicodeRange2;
40    HashSet<String> unicodeName1;
41    HashSet<String> unicodeName2;
42    HashSet<String> glyphName1;
43    HashSet<String> glyphName2;
44
45    SVGKerningPair()
46        : kerning(0)
47    {
48    }
49};
50
51typedef Vector<SVGKerningPair> KerningPairVector;
52
53class SVGMissingGlyphElement;
54
55class SVGFontElement FINAL : public SVGElement
56                           , public SVGExternalResourcesRequired {
57public:
58    static PassRefPtr<SVGFontElement> create(Document&);
59
60    void invalidateGlyphCache();
61    void collectGlyphsForString(const String&, Vector<SVGGlyph>&);
62    void collectGlyphsForGlyphName(const String&, Vector<SVGGlyph>&);
63
64    float horizontalKerningForPairOfStringsAndGlyphs(const String& u1, const String& g1, const String& u2, const String& g2) const;
65    float verticalKerningForPairOfStringsAndGlyphs(const String& u1, const String& g1, const String& u2, const String& g2) const;
66
67    // Used by SimpleFontData/WidthIterator.
68    SVGGlyph svgGlyphForGlyph(Glyph);
69    Glyph missingGlyph();
70
71    SVGMissingGlyphElement* firstMissingGlyphElement() const;
72
73private:
74    explicit SVGFontElement(Document&);
75
76    virtual bool rendererIsNeeded(const RenderStyle&) { return false; }
77
78    void ensureGlyphCache();
79    void registerLigaturesInGlyphCache(Vector<String>&);
80
81    BEGIN_DECLARE_ANIMATED_PROPERTIES(SVGFontElement)
82        DECLARE_ANIMATED_BOOLEAN(ExternalResourcesRequired, externalResourcesRequired)
83    END_DECLARE_ANIMATED_PROPERTIES
84
85    KerningPairVector m_horizontalKerningPairs;
86    KerningPairVector m_verticalKerningPairs;
87    SVGGlyphMap m_glyphMap;
88    Glyph m_missingGlyph;
89    bool m_isGlyphCacheValid;
90};
91
92DEFINE_NODE_TYPE_CASTS(SVGFontElement, hasTagName(SVGNames::fontTag));
93
94} // namespace WebCore
95
96#endif // ENABLE(SVG_FONTS)
97#endif
98