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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) 2008 Rob Buis <buis (at) kde.org>
      5  * Copyright (C) Research In Motion Limited 2011. All rights reserved.
      6  *
      7  * This library is free software; you can redistribute it and/or
      8  * modify it under the terms of the GNU Library General Public
      9  * License as published by the Free Software Foundation; either
     10  * version 2 of the License, or (at your option) any later version.
     11  *
     12  * This library is distributed in the hope that it will be useful,
     13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
     14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     15  * Library General Public License for more details.
     16  *
     17  * You should have received a copy of the GNU Library General Public License
     18  * along with this library; see the file COPYING.LIB.  If not, write to
     19  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
     20  * Boston, MA 02110-1301, USA.
     21  */
     22 
     23 #ifndef SVGGlyph_h
     24 #define SVGGlyph_h
     25 
     26 #if ENABLE(SVG_FONTS)
     27 #include "platform/PlatformExport.h"
     28 #include "platform/fonts/Glyph.h"
     29 #include "platform/graphics/Path.h"
     30 
     31 #include <limits>
     32 #include "wtf/text/WTFString.h"
     33 #include "wtf/Vector.h"
     34 
     35 namespace blink {
     36 
     37 // Describe a glyph from a SVG Font.
     38 struct SVGGlyph {
     39     enum Orientation {
     40         Vertical,
     41         Horizontal,
     42         Both
     43     };
     44 
     45     // SVG Font depends on exactly this order.
     46     enum ArabicForm {
     47         None = 0,
     48         Isolated,
     49         Terminal,
     50         Initial,
     51         Medial
     52     };
     53 
     54     SVGGlyph()
     55         : isPartOfLigature(false)
     56         , orientation(Both)
     57         , arabicForm(None)
     58         , priority(0)
     59         , tableEntry(0)
     60         , unicodeStringLength(0)
     61         , horizontalAdvanceX(0)
     62         , verticalOriginX(0)
     63         , verticalOriginY(0)
     64         , verticalAdvanceY(0)
     65     {
     66     }
     67 
     68     // Used to mark our float properties as "to be inherited from SVGFontData"
     69     static float inheritedValue()
     70     {
     71         static float s_inheritedValue = std::numeric_limits<float>::infinity();
     72         return s_inheritedValue;
     73     }
     74 
     75     bool operator==(const SVGGlyph& other) const
     76     {
     77         return isPartOfLigature == other.isPartOfLigature
     78             && orientation == other.orientation
     79             && arabicForm == other.arabicForm
     80             && tableEntry == other.tableEntry
     81             && unicodeStringLength == other.unicodeStringLength
     82             && glyphName == other.glyphName
     83             && horizontalAdvanceX == other.horizontalAdvanceX
     84             && verticalOriginX == other.verticalOriginX
     85             && verticalOriginY == other.verticalOriginY
     86             && verticalAdvanceY == other.verticalAdvanceY
     87             && languages == other.languages;
     88     }
     89 
     90     bool isPartOfLigature : 1;
     91 
     92     unsigned orientation : 2; // Orientation
     93     unsigned arabicForm : 3; // ArabicForm
     94     int priority;
     95     Glyph tableEntry;
     96     size_t unicodeStringLength;
     97     String glyphName;
     98 
     99     float horizontalAdvanceX;
    100     float verticalOriginX;
    101     float verticalOriginY;
    102     float verticalAdvanceY;
    103 
    104     Path pathData;
    105     Vector<String> languages;
    106 };
    107 
    108 Vector<SVGGlyph::ArabicForm> PLATFORM_EXPORT charactersWithArabicForm(const String& input, bool rtl);
    109 bool PLATFORM_EXPORT isCompatibleGlyph(const SVGGlyph&, bool isVerticalText, const String& language, const Vector<SVGGlyph::ArabicForm>&, unsigned startPosition, unsigned endPosition);
    110 
    111 } // namespace blink
    112 
    113 #endif // ENABLE(SVG_FONTS)
    114 #endif
    115