1/*
2 * Copyright (C) Research In Motion Limited 2010. All rights reserved.
3 *
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Library General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
8 *
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
12 * Library General Public License for more details.
13 *
14 * You should have received a copy of the GNU Library General Public License
15 * along with this library; see the file COPYING.LIB.  If not, write to
16 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
17 * Boston, MA 02110-1301, USA.
18 */
19
20#ifndef SVGAnimatedPropertyTearOff_h
21#define SVGAnimatedPropertyTearOff_h
22
23#if ENABLE(SVG)
24#include "SVGAnimatedProperty.h"
25#include "SVGPropertyTearOff.h"
26
27namespace WebCore {
28
29template<typename PropertyType>
30class SVGAnimatedPropertyTearOff : public SVGAnimatedProperty {
31public:
32    typedef SVGPropertyTearOff<PropertyType> PropertyTearOff;
33    typedef PropertyType ContentType;
34
35    virtual ~SVGAnimatedPropertyTearOff()
36    {
37        if (m_baseVal) {
38            ASSERT(m_baseVal->animatedProperty() == this);
39            m_baseVal->setAnimatedProperty(0);
40        }
41        if (m_animVal) {
42            ASSERT(m_animVal->animatedProperty() == this);
43            m_animVal->setAnimatedProperty(0);
44        }
45    }
46
47    PropertyTearOff* baseVal()
48    {
49        if (!m_baseVal)
50            m_baseVal = PropertyTearOff::create(this, BaseValRole, m_property);
51        return m_baseVal.get();
52    }
53
54    PropertyTearOff* animVal()
55    {
56        if (!m_animVal)
57            m_animVal = PropertyTearOff::create(this, AnimValRole, m_property);
58        return m_animVal.get();
59    }
60
61    static PassRefPtr<SVGAnimatedPropertyTearOff<PropertyType> > create(SVGElement* contextElement, const QualifiedName& attributeName, AnimatedPropertyType animatedPropertyType, PropertyType& property)
62    {
63        ASSERT(contextElement);
64        return adoptRef(new SVGAnimatedPropertyTearOff<PropertyType>(contextElement, attributeName, animatedPropertyType, property));
65    }
66
67    PropertyType& currentAnimatedValue()
68    {
69        ASSERT(m_isAnimating);
70        ASSERT(m_animVal);
71        return m_animVal->propertyReference();
72    }
73
74    const PropertyType& currentBaseValue() const
75    {
76        return m_property;
77    }
78
79    void animationStarted(PropertyType* newAnimVal)
80    {
81        ASSERT(!m_isAnimating);
82        ASSERT(newAnimVal);
83        animVal()->setValue(*newAnimVal);
84        m_isAnimating = true;
85    }
86
87    void animationEnded()
88    {
89        ASSERT(m_isAnimating);
90        ASSERT(m_animVal);
91        m_animVal->setValue(m_property);
92        m_isAnimating = false;
93    }
94
95    void animValWillChange()
96    {
97        // no-op for non list types.
98        ASSERT(m_isAnimating);
99        ASSERT(m_animVal);
100    }
101
102    void animValDidChange()
103    {
104        // no-op for non list types.
105        ASSERT(m_isAnimating);
106        ASSERT(m_animVal);
107    }
108
109private:
110    SVGAnimatedPropertyTearOff(SVGElement* contextElement, const QualifiedName& attributeName, AnimatedPropertyType animatedPropertyType, PropertyType& property)
111        : SVGAnimatedProperty(contextElement, attributeName, animatedPropertyType)
112        , m_property(property)
113    {
114    }
115
116    PropertyType& m_property;
117    RefPtr<PropertyTearOff> m_baseVal;
118    RefPtr<PropertyTearOff> m_animVal;
119};
120
121}
122
123#endif // ENABLE(SVG)
124#endif // SVGAnimatedPropertyTearOff_h
125