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      1 /*
      2  * Copyright (C) 2007 Eric Seidel <eric (at) webkit.org>
      3  * Copyright (C) 2007 Nikolas Zimmermann <zimmermann (at) 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 "SVGAnimatedBoolean.h"
     27 #include "SVGExternalResourcesRequired.h"
     28 #include "SVGGlyphElement.h"
     29 #include "SVGGlyphMap.h"
     30 #include "SVGParserUtilities.h"
     31 #include "SVGStyledElement.h"
     32 
     33 namespace WebCore {
     34 
     35 // Describe an SVG <hkern>/<vkern> element
     36 struct 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(0.0f)
     47     {
     48     }
     49 };
     50 
     51 typedef Vector<SVGKerningPair> KerningPairVector;
     52 
     53 class SVGMissingGlyphElement;
     54 
     55 class SVGFontElement : public SVGStyledElement
     56                      , public SVGExternalResourcesRequired {
     57 public:
     58     static PassRefPtr<SVGFontElement> create(const QualifiedName&, Document*);
     59 
     60     void invalidateGlyphCache();
     61 
     62     void getGlyphIdentifiersForString(const String&, Vector<SVGGlyphIdentifier>&) const;
     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     SVGMissingGlyphElement* firstMissingGlyphElement() const;
     68 
     69 private:
     70     SVGFontElement(const QualifiedName&, Document*);
     71 
     72     virtual void synchronizeProperty(const QualifiedName&);
     73     virtual bool rendererIsNeeded(RenderStyle*) { return false; }
     74     virtual void fillAttributeToPropertyTypeMap();
     75     virtual AttributeToPropertyTypeMap& attributeToPropertyTypeMap();
     76 
     77     void ensureGlyphCache() const;
     78 
     79     // Animated property declarations
     80 
     81     // SVGExternalResourcesRequired
     82     DECLARE_ANIMATED_BOOLEAN(ExternalResourcesRequired, externalResourcesRequired)
     83 
     84     mutable KerningPairVector m_horizontalKerningPairs;
     85     mutable KerningPairVector m_verticalKerningPairs;
     86     mutable SVGGlyphMap m_glyphMap;
     87     mutable bool m_isGlyphCacheValid;
     88 };
     89 
     90 } // namespace WebCore
     91 
     92 #endif // ENABLE(SVG_FONTS)
     93 #endif
     94