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 #include "bindings/core/v8/ExceptionMessages.h"
25 #include "bindings/core/v8/ExceptionStatePlaceholder.h"
26 #include "core/svg/SVGLengthContext.h"
27 #include "core/svg/properties/SVGProperty.h"
28 #include "platform/heap/Handle.h"
29
30 namespace blink {
31
32 class CSSPrimitiveValue;
33 class ExceptionState;
34 class QualifiedName;
35
36 enum SVGLengthNegativeValuesMode {
37 AllowNegativeLengths,
38 ForbidNegativeLengths
39 };
40
41 class SVGLengthTearOff;
42
43 class SVGLength FINAL : public SVGPropertyBase {
44 public:
45 typedef SVGLengthTearOff TearOffType;
46
47 static PassRefPtr<SVGLength> create(SVGLengthMode mode = LengthModeOther)
48 {
49 return adoptRef(new SVGLength(mode));
50 }
51
52 PassRefPtr<SVGLength> clone() const;
53 virtual PassRefPtr<SVGPropertyBase> cloneForAnimation(const String&) const OVERRIDE;
54
unitType()55 SVGLengthType unitType() const { return static_cast<SVGLengthType>(m_unitType); }
56 void setUnitType(SVGLengthType);
unitMode()57 SVGLengthMode unitMode() const { return static_cast<SVGLengthMode>(m_unitMode); }
58
59 bool operator==(const SVGLength&) const;
60 bool operator!=(const SVGLength& other) const { return !operator==(other); }
61
value(const SVGLengthContext & context)62 float value(const SVGLengthContext& context) const
63 {
64 return value(context, IGNORE_EXCEPTION);
65 }
66 float value(const SVGLengthContext&, ExceptionState&) const;
67 void setValue(float, const SVGLengthContext&, ExceptionState&);
68
valueInSpecifiedUnits()69 float valueInSpecifiedUnits() const { return m_valueInSpecifiedUnits; }
setValueInSpecifiedUnits(float value)70 void setValueInSpecifiedUnits(float value) { m_valueInSpecifiedUnits = value; }
71
72 float valueAsPercentage() const;
73
74 virtual String valueAsString() const OVERRIDE;
75 void setValueAsString(const String&, ExceptionState&);
76
77 void newValueSpecifiedUnits(SVGLengthType, float valueInSpecifiedUnits);
78 void convertToSpecifiedUnits(SVGLengthType, const SVGLengthContext&, ExceptionState&);
79
80 // Helper functions
isRelative()81 inline bool isRelative() const
82 {
83 return m_unitType == LengthTypePercentage
84 || m_unitType == LengthTypeEMS
85 || m_unitType == LengthTypeEXS;
86 }
87
isZero()88 bool isZero() const
89 {
90 return !m_valueInSpecifiedUnits;
91 }
92
93 static PassRefPtr<SVGLength> fromCSSPrimitiveValue(CSSPrimitiveValue*);
94 static PassRefPtrWillBeRawPtr<CSSPrimitiveValue> toCSSPrimitiveValue(PassRefPtr<SVGLength>);
95 static SVGLengthMode lengthModeForAnimatedLengthAttribute(const QualifiedName&);
96
97 PassRefPtr<SVGLength> blend(PassRefPtr<SVGLength> from, float progress) const;
98
99 virtual void add(PassRefPtrWillBeRawPtr<SVGPropertyBase>, SVGElement*) OVERRIDE;
100 virtual void calculateAnimatedValue(SVGAnimationElement*, float percentage, unsigned repeatCount, PassRefPtr<SVGPropertyBase> from, PassRefPtr<SVGPropertyBase> to, PassRefPtr<SVGPropertyBase> toAtEndOfDurationValue, SVGElement* contextElement) OVERRIDE;
101 virtual float calculateDistance(PassRefPtr<SVGPropertyBase> to, SVGElement* contextElement) OVERRIDE;
102
classType()103 static AnimatedPropertyType classType() { return AnimatedLength; }
104
105 private:
106 SVGLength(SVGLengthMode);
107 SVGLength(const SVGLength&);
108
109 float m_valueInSpecifiedUnits;
110 unsigned m_unitMode : 2;
111 unsigned m_unitType : 4;
112 };
113
toSVGLength(PassRefPtr<SVGPropertyBase> passBase)114 inline PassRefPtr<SVGLength> toSVGLength(PassRefPtr<SVGPropertyBase> passBase)
115 {
116 RefPtr<SVGPropertyBase> base = passBase;
117 ASSERT(base->type() == SVGLength::classType());
118 return static_pointer_cast<SVGLength>(base.release());
119 }
120
121 } // namespace blink
122
123 #endif // SVGLength_h
124