1 /* 2 * Copyright (C) 2004, 2005, 2006, 2008 Nikolas Zimmermann <zimmermann@kde.org> 3 * Copyright (C) 2004, 2005, 2006 Rob Buis <buis@kde.org> 4 * 5 * This library is free software; you can redistribute it and/or 6 * modify it under the terms of the GNU Library General Public 7 * License as published by the Free Software Foundation; either 8 * version 2 of the License, or (at your option) any later version. 9 * 10 * This library is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13 * Library General Public License for more details. 14 * 15 * You should have received a copy of the GNU Library General Public License 16 * along with this library; see the file COPYING.LIB. If not, write to 17 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 18 * Boston, MA 02110-1301, USA. 19 */ 20 21 #ifndef SVGLength_h 22 #define SVGLength_h 23 24 #if ENABLE(SVG) 25 #include "ExceptionCode.h" 26 #include "SVGPropertyTraits.h" 27 28 namespace WebCore { 29 30 class CSSPrimitiveValue; 31 32 enum SVGLengthType { 33 LengthTypeUnknown = 0, 34 LengthTypeNumber = 1, 35 LengthTypePercentage = 2, 36 LengthTypeEMS = 3, 37 LengthTypeEXS = 4, 38 LengthTypePX = 5, 39 LengthTypeCM = 6, 40 LengthTypeMM = 7, 41 LengthTypeIN = 8, 42 LengthTypePT = 9, 43 LengthTypePC = 10 44 }; 45 46 enum SVGLengthMode { 47 LengthModeWidth = 0, 48 LengthModeHeight, 49 LengthModeOther 50 }; 51 52 class SVGElement; 53 54 class SVGLength { 55 public: 56 // Forward declare these enums in the w3c naming scheme, for IDL generation 57 enum { 58 SVG_LENGTHTYPE_UNKNOWN = LengthTypeUnknown, 59 SVG_LENGTHTYPE_NUMBER = LengthTypeNumber, 60 SVG_LENGTHTYPE_PERCENTAGE = LengthTypePercentage, 61 SVG_LENGTHTYPE_EMS = LengthTypeEMS, 62 SVG_LENGTHTYPE_EXS = LengthTypeEXS, 63 SVG_LENGTHTYPE_PX = LengthTypePX, 64 SVG_LENGTHTYPE_CM = LengthTypeCM, 65 SVG_LENGTHTYPE_MM = LengthTypeMM, 66 SVG_LENGTHTYPE_IN = LengthTypeIN, 67 SVG_LENGTHTYPE_PT = LengthTypePT, 68 SVG_LENGTHTYPE_PC = LengthTypePC 69 }; 70 71 SVGLength(SVGLengthMode mode = LengthModeOther, const String& valueAsString = String()); 72 SVGLength(const SVGLength&); 73 74 SVGLengthType unitType() const; 75 76 bool operator==(const SVGLength&) const; 77 bool operator!=(const SVGLength&) const; 78 79 float value(const SVGElement* context) const; 80 float value(const SVGElement* context, ExceptionCode&) const; 81 void setValue(float, const SVGElement* context, ExceptionCode&); 82 valueInSpecifiedUnits()83 float valueInSpecifiedUnits() const { return m_valueInSpecifiedUnits; } setValueInSpecifiedUnits(float value)84 void setValueInSpecifiedUnits(float value) { m_valueInSpecifiedUnits = value; } 85 86 float valueAsPercentage() const; 87 88 String valueAsString() const; 89 void setValueAsString(const String&, ExceptionCode&); 90 91 void newValueSpecifiedUnits(unsigned short, float valueInSpecifiedUnits, ExceptionCode&); 92 void convertToSpecifiedUnits(unsigned short, const SVGElement* context, ExceptionCode&); 93 94 // Helper functions isRelative()95 inline bool isRelative() const 96 { 97 SVGLengthType type = unitType(); 98 return type == LengthTypePercentage || type == LengthTypeEMS || type == LengthTypeEXS; 99 } 100 101 static SVGLength fromCSSPrimitiveValue(CSSPrimitiveValue*); 102 static PassRefPtr<CSSPrimitiveValue> toCSSPrimitiveValue(const SVGLength&); 103 104 private: 105 bool determineViewport(const SVGElement* context, float& width, float& height) const; 106 107 float convertValueFromPercentageToUserUnits(float value, const SVGElement* context, ExceptionCode&) const; 108 float convertValueFromUserUnitsToPercentage(float value, const SVGElement* context, ExceptionCode&) const; 109 110 float convertValueFromUserUnitsToEMS(float value, const SVGElement* context, ExceptionCode&) const; 111 float convertValueFromEMSToUserUnits(float value, const SVGElement* context, ExceptionCode&) const; 112 113 float convertValueFromUserUnitsToEXS(float value, const SVGElement* context, ExceptionCode&) const; 114 float convertValueFromEXSToUserUnits(float value, const SVGElement* context, ExceptionCode&) const; 115 116 private: 117 float m_valueInSpecifiedUnits; 118 unsigned int m_unit; 119 }; 120 121 template<> 122 struct SVGPropertyTraits<SVGLength> { 123 static SVGLength initialValue() { return SVGLength(); } 124 static String toString(const SVGLength& type) { return type.valueAsString(); } 125 }; 126 127 128 } // namespace WebCore 129 130 #endif // ENABLE(SVG) 131 #endif // SVGLength_h 132