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 Timing_h
32#define Timing_h
33
34#include "platform/animation/TimingFunction.h"
35#include "wtf/MathExtras.h"
36#include "wtf/RefPtr.h"
37
38namespace blink {
39
40struct Timing {
41    enum FillMode {
42        FillModeAuto,
43        FillModeNone,
44        FillModeForwards,
45        FillModeBackwards,
46        FillModeBoth
47    };
48
49    enum PlaybackDirection {
50        PlaybackDirectionNormal,
51        PlaybackDirectionReverse,
52        PlaybackDirectionAlternate,
53        PlaybackDirectionAlternateReverse
54    };
55
56    static const Timing& defaults()
57    {
58        DEFINE_STATIC_LOCAL(Timing, timing, ());
59        return timing;
60    }
61
62    Timing()
63        : startDelay(0)
64        , endDelay(0)
65        , fillMode(FillModeAuto)
66        , iterationStart(0)
67        , iterationCount(1)
68        , iterationDuration(std::numeric_limits<double>::quiet_NaN())
69        , playbackRate(1)
70        , direction(PlaybackDirectionNormal)
71        , timingFunction(LinearTimingFunction::shared())
72    {
73    }
74
75    void assertValid() const
76    {
77        ASSERT(std::isfinite(startDelay));
78        ASSERT(std::isfinite(endDelay));
79        ASSERT(std::isfinite(iterationStart));
80        ASSERT(iterationStart >= 0);
81        ASSERT(iterationCount >= 0);
82        ASSERT(std::isnan(iterationDuration) || iterationDuration >= 0);
83        ASSERT(std::isfinite(playbackRate));
84        ASSERT(timingFunction);
85    }
86
87    double startDelay;
88    double endDelay;
89    FillMode fillMode;
90    double iterationStart;
91    double iterationCount;
92    double iterationDuration;
93    double playbackRate;
94    PlaybackDirection direction;
95    RefPtr<TimingFunction> timingFunction;
96};
97
98} // namespace blink
99
100#endif
101