khtml/svg/SVGAngle.h

   1 /*
   2     Copyright (C) 2004, 2005, 2007, 2008 Nikolas Zimmermann <zimmermann@kde.org>
   3                   2004, 2005, 2006 Rob Buis <buis@kde.org>
   4
   5     This file is part of the KDE project
   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 SVGAngle_h
  24 #define SVGAngle_h
  25
  26 #if ENABLE(SVG)
  27 //#include "PlatformString.h"
  28 #include "wtf/RefCounted.h"
  29 #include "SVGNames.h"
  30
  31 namespace WebCore {
  32
  33     class SVGStyledElement;
  34
  35     class SVGAngle : public RefCounted<SVGAngle> {
  36     public:
  37         SVGAngle();
  38         virtual ~SVGAngle();
  39
  40         enum SVGAngleType {
  41             SVG_ANGLETYPE_UNKNOWN           = 0,
  42             SVG_ANGLETYPE_UNSPECIFIED       = 1,
  43             SVG_ANGLETYPE_DEG               = 2,
  44             SVG_ANGLETYPE_RAD               = 3,
  45             SVG_ANGLETYPE_GRAD              = 4
  46         };
  47
  48         SVGAngleType unitType() const;
  49
  50         void setValue(float);
  51         float value() const;
  52
  53         void setValueInSpecifiedUnits(float valueInSpecifiedUnits);
  54         float valueInSpecifiedUnits() const;
  55
  56         void setValueAsString(const String&);
  57         String valueAsString() const;
  58
  59         void newValueSpecifiedUnits(unsigned short unitType, float valueInSpecifiedUnits);
  60         void convertToSpecifiedUnits(unsigned short unitType);
  61
  62         // Helpers
  63         static double todeg(double rad);
  64         static double torad(double deg);
  65
  66         // Returns the angle that divides the shortest arc between the two angles.
  67         static double shortestArcBisector(double angle1, double angle2);
  68
  69         // Throughout SVG 1.1 'SVGAngle' is only used for 'SVGMarkerElement' (orient-angle)
  70         const QualifiedName& associatedAttributeName() const { return SVGNames::orientAttr; }
  71
  72     private:
  73         SVGAngleType m_unitType;
  74         float m_value;
  75         float m_valueInSpecifiedUnits;
  76         mutable String m_valueAsString;
  77
  78         void calculate();
  79     };
  80
  81 } // namespace WebCore
  82
  83 #endif // ENABLE(SVG)
  84 #endif // SVGAngle_h