1/*
2 * Copyright (C) 2013 Google Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are
6 * met:
7 *
8 *     * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 *     * Redistributions in binary form must reproduce the above
11 * copyright notice, this list of conditions and the following disclaimer
12 * in the documentation and/or other materials provided with the
13 * distribution.
14 *     * Neither the name of Google Inc. nor the names of its
15 * contributors may be used to endorse or promote products derived from
16 * this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31#ifndef AnimatableUnknown_h
32#define AnimatableUnknown_h
33
34#include "core/CSSValueKeywords.h"
35#include "core/animation/animatable/AnimatableValue.h"
36#include "core/css/CSSValuePool.h"
37
38namespace blink {
39
40class AnimatableUnknown FINAL : public AnimatableValue {
41public:
42    virtual ~AnimatableUnknown() { }
43
44    static PassRefPtrWillBeRawPtr<AnimatableUnknown> create(PassRefPtrWillBeRawPtr<CSSValue> value)
45    {
46        return adoptRefWillBeNoop(new AnimatableUnknown(value));
47    }
48    static PassRefPtrWillBeRawPtr<AnimatableUnknown> create(CSSValueID value)
49    {
50        return adoptRefWillBeNoop(new AnimatableUnknown(cssValuePool().createIdentifierValue(value)));
51    }
52
53    PassRefPtrWillBeRawPtr<CSSValue> toCSSValue() const { return m_value; }
54    CSSValueID toCSSValueID() const { return toCSSPrimitiveValue(m_value.get())->getValueID(); }
55
56    virtual void trace(Visitor* visitor) OVERRIDE
57    {
58        visitor->trace(m_value);
59        AnimatableValue::trace(visitor);
60    }
61
62protected:
63    virtual PassRefPtrWillBeRawPtr<AnimatableValue> interpolateTo(const AnimatableValue* value, double fraction) const OVERRIDE
64    {
65        return defaultInterpolateTo(this, value, fraction);
66    }
67
68    virtual bool usesDefaultInterpolationWith(const AnimatableValue*) const OVERRIDE { return true; }
69
70private:
71    explicit AnimatableUnknown(PassRefPtrWillBeRawPtr<CSSValue> value)
72        : m_value(value)
73    {
74        ASSERT(m_value);
75    }
76    virtual AnimatableType type() const OVERRIDE { return TypeUnknown; }
77    virtual bool equalTo(const AnimatableValue*) const OVERRIDE;
78
79    const RefPtrWillBeMember<CSSValue> m_value;
80};
81
82DEFINE_ANIMATABLE_VALUE_TYPE_CASTS(AnimatableUnknown, isUnknown());
83
84inline bool AnimatableUnknown::equalTo(const AnimatableValue* value) const
85{
86    const AnimatableUnknown* unknown = toAnimatableUnknown(value);
87    return m_value == unknown->m_value || m_value->equals(*unknown->m_value);
88}
89
90} // namespace blink
91
92#endif // AnimatableUnknown_h
93