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#include "config.h"
32#include "core/animation/animatable/AnimatableVisibility.h"
33
34namespace blink {
35
36bool AnimatableVisibility::usesDefaultInterpolationWith(const AnimatableValue* value) const
37{
38    EVisibility from = m_visibility;
39    EVisibility to = toAnimatableVisibility(value)->m_visibility;
40    return from != VISIBLE && to != VISIBLE;
41}
42
43PassRefPtrWillBeRawPtr<AnimatableValue> AnimatableVisibility::interpolateTo(const AnimatableValue* value, double fraction) const
44{
45    EVisibility from = m_visibility;
46    EVisibility to = toAnimatableVisibility(value)->m_visibility;
47    if (from != VISIBLE && to != VISIBLE)
48        return defaultInterpolateTo(this, value, fraction);
49    if (fraction <= 0)
50        return takeConstRef(this);
51    if (fraction >= 1)
52        return takeConstRef(value);
53    return takeConstRef(from == VISIBLE ? this : value);
54}
55
56bool AnimatableVisibility::equalTo(const AnimatableValue* value) const
57{
58    return m_visibility == toAnimatableVisibility(value)->m_visibility;
59}
60
61} // namespace blink
62