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/ElementAnimation.h"
33
34#include "core/animation/DocumentTimeline.h"
35#include "core/css/RuntimeCSSEnabled.h"
36#include "core/css/resolver/StyleResolver.h"
37#include "wtf/text/StringBuilder.h"
38#include <algorithm>
39
40namespace WebCore {
41
42CSSPropertyID ElementAnimation::camelCaseCSSPropertyNameToID(const String& propertyName)
43{
44    if (propertyName.find('-') != kNotFound)
45        return CSSPropertyInvalid;
46
47    StringBuilder builder;
48    size_t position = 0;
49    size_t end;
50    while ((end = propertyName.find(isASCIIUpper, position)) != kNotFound) {
51        builder.append(propertyName.substring(position, end - position) + "-" + toASCIILower((propertyName)[end]));
52        position = end + 1;
53    }
54    builder.append(propertyName.substring(position));
55    // Doesn't handle prefixed properties.
56    CSSPropertyID id = cssPropertyID(builder.toString());
57    return id;
58}
59
60void ElementAnimation::animate(Element* element, Vector<Dictionary> keyframeDictionaryVector, double duration)
61{
62    ASSERT(RuntimeEnabledFeatures::webAnimationsAPIEnabled());
63
64    // FIXME: This test will not be neccessary once resolution of keyframe values occurs at
65    // animation application time.
66    if (!element->inActiveDocument())
67        return;
68    element->document().updateStyleIfNeeded();
69    if (!element->renderer())
70        return;
71
72    startAnimation(element, keyframeDictionaryVector, duration);
73}
74
75void ElementAnimation::startAnimation(Element* element, Vector<Dictionary> keyframeDictionaryVector, double duration)
76{
77    KeyframeAnimationEffect::KeyframeVector keyframes;
78    Vector<RefPtr<MutableStylePropertySet> > propertySetVector;
79
80    for (size_t i = 0; i < keyframeDictionaryVector.size(); ++i) {
81        RefPtr<MutableStylePropertySet> propertySet = MutableStylePropertySet::create();
82        propertySetVector.append(propertySet);
83
84        RefPtr<Keyframe> keyframe = Keyframe::create();
85        keyframes.append(keyframe);
86
87        double offset;
88        if (keyframeDictionaryVector[i].get("offset", offset)) {
89            keyframe->setOffset(offset);
90        } else {
91            // FIXME: Web Animations CSS engine does not yet implement handling of
92            // keyframes without specified offsets. This check can be removed when
93            // that funcitonality is implemented.
94            ASSERT_NOT_REACHED();
95            return;
96        }
97
98        String compositeString;
99        keyframeDictionaryVector[i].get("composite", compositeString);
100        if (compositeString == "add")
101            keyframe->setComposite(AnimationEffect::CompositeAdd);
102
103        Vector<String> keyframeProperties;
104        keyframeDictionaryVector[i].getOwnPropertyNames(keyframeProperties);
105
106        for (size_t j = 0; j < keyframeProperties.size(); ++j) {
107            String property = keyframeProperties[j];
108            CSSPropertyID id = camelCaseCSSPropertyNameToID(property);
109
110            // FIXME: There is no way to store invalid properties or invalid values
111            // in a Keyframe object, so for now I just skip over them. Eventually we
112            // will need to support getFrames(), which should return exactly the
113            // keyframes that were input through the API. We will add a layer to wrap
114            // KeyframeAnimationEffect, store input keyframes and implement getFrames.
115            if (id == CSSPropertyInvalid || !CSSAnimations::isAnimatableProperty(id))
116                continue;
117
118            String value;
119            keyframeDictionaryVector[i].get(property, value);
120            propertySet->setProperty(id, value);
121        }
122    }
123
124    // FIXME: Replace this with code that just parses, when that code is available.
125    RefPtr<KeyframeAnimationEffect> effect = StyleResolver::createKeyframeAnimationEffect(*element, propertySetVector, keyframes);
126
127    // FIXME: Totally hardcoded Timing for now. Will handle timing parameters later.
128    Timing timing;
129    // FIXME: Currently there is no way to tell whether or not an iterationDuration
130    // has been specified (becauser the default argument is 0). So any animation
131    // created using Element.animate() will have a timing with hasIterationDuration()
132    // == true.
133    timing.hasIterationDuration = true;
134    timing.iterationDuration = std::max<double>(duration, 0);
135
136    RefPtr<Animation> animation = Animation::create(element, effect, timing);
137    DocumentTimeline* timeline = element->document().timeline();
138    ASSERT(timeline);
139    timeline->play(animation.get());
140}
141
142} // namespace WebCore
143