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/*
* Copyright (C) 2007 Eric Seidel <eric@webkit.org>
* Copyright (C) 2007 Nikolas Zimmermann <zimmermann@kde.org>
* 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 SVGFontElement_h
#define SVGFontElement_h
#if ENABLE(SVG_FONTS)
#include "SVGAnimatedBoolean.h"
#include "SVGExternalResourcesRequired.h"
#include "SVGGlyphMap.h"
#include "SVGNames.h"
#include "SVGParserUtilities.h"
#include "SVGStyledElement.h"
namespace WebCore {
// Describe an SVG <hkern>/<vkern> element already matched on the first symbol.
struct SVGKerning {
float kerning;
UnicodeRanges unicodeRange2;
HashSet<String> unicodeName2;
HashSet<String> glyphName2;
SVGKerning()
: kerning(0)
{ }
};
// Describe an SVG <hkern>/<vkern> element
struct SVGKerningPair : public SVGKerning {
UnicodeRanges unicodeRange1;
HashSet<String> unicodeName1;
HashSet<String> glyphName1;
};
typedef Vector<SVGKerning> SVGKerningVector;
struct SVGKerningMap {
HashMap<String, OwnPtr<SVGKerningVector> > unicodeMap;
HashMap<String, OwnPtr<SVGKerningVector> > glyphMap;
Vector<SVGKerningPair> kerningUnicodeRangeMap;
bool isEmpty() const { return unicodeMap.isEmpty() && glyphMap.isEmpty() && kerningUnicodeRangeMap.isEmpty(); }
void clear();
void insert(const SVGKerningPair&);
};
class SVGMissingGlyphElement;
class SVGFontElement FINAL : public SVGStyledElement
, public SVGExternalResourcesRequired {
public:
static PassRefPtr<SVGFontElement> create(const QualifiedName&, Document*);
void invalidateGlyphCache();
void collectGlyphsForString(const String&, Vector<SVGGlyph>&);
void collectGlyphsForGlyphName(const String&, Vector<SVGGlyph>&);
float horizontalKerningForPairOfStringsAndGlyphs(const String& u1, const String& g1, const String& u2, const String& g2) const;
float verticalKerningForPairOfStringsAndGlyphs(const String& u1, const String& g1, const String& u2, const String& g2) const;
// Used by SimpleFontData/WidthIterator.
SVGGlyph svgGlyphForGlyph(Glyph);
Glyph missingGlyph();
SVGMissingGlyphElement* firstMissingGlyphElement() const;
private:
SVGFontElement(const QualifiedName&, Document*);
virtual bool rendererIsNeeded(const NodeRenderingContext&) { return false; }
void ensureGlyphCache();
void registerLigaturesInGlyphCache(Vector<String>&);
BEGIN_DECLARE_ANIMATED_PROPERTIES(SVGFontElement)
DECLARE_ANIMATED_BOOLEAN(ExternalResourcesRequired, externalResourcesRequired)
END_DECLARE_ANIMATED_PROPERTIES
SVGKerningMap m_horizontalKerningMap;
SVGKerningMap m_verticalKerningMap;
SVGGlyphMap m_glyphMap;
Glyph m_missingGlyph;
bool m_isGlyphCacheValid;
};
inline bool isSVGFontElement(const Node* node)
{
return node->hasTagName(SVGNames::fontTag);
}
inline SVGFontElement* toSVGFontElement(Node* node)
{
ASSERT_WITH_SECURITY_IMPLICATION(!node || isSVGFontElement(node));
return static_cast<SVGFontElement*>(node);
}
} // namespace WebCore
#endif // ENABLE(SVG_FONTS)
#endif
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