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 "SVGExternalResourcesRequired.h"

    27 #include "SVGGlyphElement.h"

    28 #include "SVGGlyphMap.h"

    29 #include "SVGParserUtilities.h"

    30 #include "SVGStyledElement.h"

    31 

    32 namespace WebCore {

    33 

    34 // Describe an SVG <hkern>/<vkern> element

    35 struct SVGKerningPair {

    36     float kerning;

    37     UnicodeRanges unicodeRange1;

    38     UnicodeRanges unicodeRange2;

    39     HashSet<String> unicodeName1;

    40     HashSet<String> unicodeName2;

    41     HashSet<String> glyphName1;

    42     HashSet<String> glyphName2;

    43     

    44     SVGKerningPair()

    45         : kerning(0.0f)

    46     {

    47     }

    48 };

    49 

    50 typedef Vector<SVGKerningPair> KerningPairVector;

    51 

    52 class SVGMissingGlyphElement;    

    53 class SVGFontElement : public SVGStyledElement

    54                      , public SVGExternalResourcesRequired {

    55 public:

    56     SVGFontElement(const QualifiedName&, Document*);

    57     virtual ~SVGFontElement();

    58 

    59     virtual void synchronizeProperty(const QualifiedName&);

    60     virtual bool rendererIsNeeded(RenderStyle*) { return false; }    

    61 

    62     void invalidateGlyphCache();

    63 

    64     void getGlyphIdentifiersForString(const String&, Vector<SVGGlyphIdentifier>&) const;

    65 

    66     float horizontalKerningForPairOfStringsAndGlyphs(const String& u1, const String& g1, const String& u2, const String& g2) const;

    67     float verticalKerningForPairOfStringsAndGlyphs(const String& u1, const String& g1, const String& u2, const String& g2) const;

    68     

    69     SVGMissingGlyphElement* firstMissingGlyphElement() const;

    70 

    71 private:

    72     // SVGExternalResourcesRequired

    73     DECLARE_ANIMATED_PROPERTY(SVGFontElement, SVGNames::externalResourcesRequiredAttr, bool, ExternalResourcesRequired, externalResourcesRequired)

    74 

    75     void ensureGlyphCache() const;

    76 

    77     mutable KerningPairVector m_horizontalKerningPairs;

    78     mutable KerningPairVector m_verticalKerningPairs;

    79     mutable SVGGlyphMap m_glyphMap;

    80     mutable bool m_isGlyphCacheValid;

    81 };

    82 

    83 } // namespace WebCore

    84 

    85 #endif // ENABLE(SVG_FONTS)

    86 #endif