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
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 AnimatableDouble_h
32#define AnimatableDouble_h
33
34#include "core/animation/animatable/AnimatableValue.h"
35
36namespace blink {
37
38class AnimatableDouble FINAL : public AnimatableValue {
39public:
40    virtual ~AnimatableDouble() { }
41
42    enum Constraint {
43        Unconstrained,
44        InterpolationIsNonContinuousWithZero,
45    };
46
47    static PassRefPtrWillBeRawPtr<AnimatableDouble> create(double number, Constraint constraint = Unconstrained)
48    {
49        return adoptRefWillBeNoop(new AnimatableDouble(number, constraint));
50    }
51
52    double toDouble() const { return m_number; }
53
54    virtual void trace(Visitor* visitor) OVERRIDE { AnimatableValue::trace(visitor); }
55
56protected:
57    virtual PassRefPtrWillBeRawPtr<AnimatableValue> interpolateTo(const AnimatableValue*, double fraction) const OVERRIDE;
58    virtual bool usesDefaultInterpolationWith(const AnimatableValue*) const OVERRIDE;
59
60private:
61    AnimatableDouble(double number, Constraint constraint)
62        : m_number(number)
63        , m_constraint(constraint)
64    {
65    }
66    virtual AnimatableType type() const OVERRIDE { return TypeDouble; }
67    virtual bool equalTo(const AnimatableValue*) const OVERRIDE;
68    virtual double distanceTo(const AnimatableValue*) const OVERRIDE;
69
70    double m_number;
71    Constraint m_constraint;
72};
73
74DEFINE_ANIMATABLE_VALUE_TYPE_CASTS(AnimatableDouble, isDouble());
75
76} // namespace blink
77
78#endif // AnimatableDouble_h
79