File indexing completed on 2024-04-28 15:24:34

 /*
    Copyright (C) 2007 Eric Seidel <eric@webkit.org>
    Copyright (C) 2007 Nikolas Zimmermann <zimmermann@kde.org>
 
    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 SVGGlyphElement_h
 #define SVGGlyphElement_h
 
 #if ENABLE(SVG_FONTS)
 #include "SVGStyledElement.h"
 
 #include <limits>
 #include "Path.h"
 
 namespace khtml
 {
 class AtomicString;
 }
 
 namespace WebCore
 {
 
 using khtml::AtomicString;
 class SVGFontData;
 
 // Describe a SVG <glyph> element
 struct SVGGlyphIdentifier {
     enum Orientation {
         Vertical,
         Horizontal,
         Both
     };
 
     // SVG Font depends on exactly this order.
     enum ArabicForm {
         None = 0,
         Isolated,
         Terminal,
         Initial,
         Medial
     };
 
     SVGGlyphIdentifier()
         : isValid(false)
         , orientation(Both)
         , arabicForm(None)
         , priority(0)
         , nameLength(0)
         , horizontalAdvanceX(0.0f)
         , verticalOriginX(0.0f)
         , verticalOriginY(0.0f)
         , verticalAdvanceY(0.0f)
     {
     }
 
     // Used to mark our float properties as "to be inherited from SVGFontData"
     static float inheritedValue()
     {
         static float s_inheritedValue = std::numeric_limits<float>::infinity();
         return s_inheritedValue;
     }
 
     bool operator==(const SVGGlyphIdentifier &other) const
     {
         return isValid == other.isValid &&
                orientation == other.orientation &&
                arabicForm == other.arabicForm &&
                glyphName == other.glyphName &&
                horizontalAdvanceX == other.horizontalAdvanceX &&
                verticalOriginX == other.verticalOriginX &&
                verticalOriginY == other.verticalOriginY &&
                verticalAdvanceY == other.verticalAdvanceY &&
                pathData.debugString() == other.pathData.debugString() &&
                languages == other.languages;
     }
 
     bool isValid : 1;
 
     Orientation orientation : 2;
     ArabicForm arabicForm : 3;
     int priority;
     size_t nameLength;
     String glyphName;
 
     float horizontalAdvanceX;
     float verticalOriginX;
     float verticalOriginY;
     float verticalAdvanceY;
 
     Path pathData;
     Vector<String> languages;
 };
 
 class SVGGlyphElement : public SVGStyledElement
 {
 public:
     SVGGlyphElement(const QualifiedName &, Document *);
     virtual ~SVGGlyphElement();
 
     void insertedIntoDocument() override;
     void removedFromDocument() override;
 
     bool rendererIsNeeded(RenderStyle *) override
     {
         return false;
     }
 
     SVGGlyphIdentifier buildGlyphIdentifier() const;
 
     // Helper function used by SVGFont
     static void inheritUnspecifiedAttributes(SVGGlyphIdentifier &, const SVGFontData *);
     static String querySVGFontLanguage(const SVGElement *);
 
     // Helper function shared between SVGGlyphElement & SVGMissingGlyphElement
     static SVGGlyphIdentifier buildGenericGlyphIdentifier(const SVGElement *);
 };
 
 } // namespace WebCore
 
 #endif // ENABLE(SVG_FONTS)
 #endif