khtml/svg/SVGLength.h

   1 /*
   2     Copyright (C) 2004, 2005, 2006 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 SVGLength_h
  24 #define SVGLength_h
  25
  26 #if ENABLE(SVG)
  27
  28 //#include "PlatformString.h"
  29 #include "Document.h"
  30
  31 namespace WebCore {
  32
  33     class SVGStyledElement;
  34
  35     enum SVGLengthType {
  36         LengthTypeUnknown = 0,
  37         LengthTypeNumber = 1,
  38         LengthTypePercentage = 2,
  39         LengthTypeEMS = 3,
  40         LengthTypeEXS = 4,
  41         LengthTypePX = 5,
  42         LengthTypeCM = 6,
  43         LengthTypeMM = 7,
  44         LengthTypeIN = 8,
  45         LengthTypePT = 9,
  46         LengthTypePC = 10
  47     };
  48
  49     enum SVGLengthMode {
  50         LengthModeWidth = 0,
  51         LengthModeHeight,
  52         LengthModeOther
  53     };
  54
  55     class SVGLength {
  56     public:
  57         // Forward declare these enums in the w3c naming scheme, for IDL generation
  58         enum {
  59             SVG_LENGTHTYPE_UNKNOWN = LengthTypeUnknown,
  60             SVG_LENGTHTYPE_NUMBER = LengthTypeNumber,
  61             SVG_LENGTHTYPE_PERCENTAGE = LengthTypePercentage,
  62             SVG_LENGTHTYPE_EMS = LengthTypeEMS,
  63             SVG_LENGTHTYPE_EXS = LengthTypeEXS,
  64             SVG_LENGTHTYPE_PX = LengthTypePX,
  65             SVG_LENGTHTYPE_CM = LengthTypeCM,
  66             SVG_LENGTHTYPE_MM = LengthTypeMM,
  67             SVG_LENGTHTYPE_IN = LengthTypeIN,
  68             SVG_LENGTHTYPE_PT = LengthTypePT,
  69             SVG_LENGTHTYPE_PC = LengthTypePC
  70         };
  71
  72         SVGLength(const SVGStyledElement* context = 0, SVGLengthMode mode = LengthModeOther, const String& valueAsString = String());
  73
  74         // 'SVGLength' functions
  75         SVGLengthType unitType() const;
  76
  77         float value() const;
  78         void setValue(float);
  79
  80         float valueInSpecifiedUnits() const;
  81         void setValueInSpecifiedUnits(float);
  82
  83         float valueAsPercentage() const;
  84
  85         String valueAsString() const;
  86         bool setValueAsString(const String&);
  87
  88         void newValueSpecifiedUnits(unsigned short, float valueInSpecifiedUnits);
  89         void convertToSpecifiedUnits(unsigned short);
  90
  91         // Helper functions
  92         static float PercentageOfViewport(float value, const SVGStyledElement*, SVGLengthMode);
  93
  94         inline bool isRelative() const
  95         {
  96             SVGLengthType type = unitType();
  97             return (type == LengthTypePercentage || type == LengthTypeEMS || type == LengthTypeEXS);
  98         }
  99
 100     private:
 101         float m_valueInSpecifiedUnits;
 102         unsigned int m_unit;
 103
 104         const SVGStyledElement* m_context;
 105     };
 106
 107 } // namespace WebCore
 108
 109 #endif // ENABLE(SVG)
 110 #endif // SVGLength_h
 111
 112 // vim:ts=4:noet