1/*
2 * Copyright (C) 2018 Apple 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
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#include "config.h"
27#include "CSSTransition.h"
28
29#include "Animation.h"
30#include "Element.h"
31#include "KeyframeEffect.h"
32#include <wtf/IsoMallocInlines.h>
33
34namespace WebCore {
35
36WTF_MAKE_ISO_ALLOCATED_IMPL(CSSTransition);
37
38Ref<CSSTransition> CSSTransition::create(Element& owningElement, CSSPropertyID property, MonotonicTime generationTime, const Animation& backingAnimation, const RenderStyle* oldStyle, const RenderStyle& newStyle, Seconds delay, Seconds duration, const RenderStyle& reversingAdjustedStartStyle, double reversingShorteningFactor)
39{
40 auto result = adoptRef(*new CSSTransition(owningElement, property, generationTime, backingAnimation, newStyle, reversingAdjustedStartStyle, reversingShorteningFactor));
41 result->initialize(oldStyle, newStyle);
42 result->setTimingProperties(delay, duration);
43 return result;
44}
45
46CSSTransition::CSSTransition(Element& element, CSSPropertyID property, MonotonicTime generationTime, const Animation& backingAnimation, const RenderStyle& targetStyle, const RenderStyle& reversingAdjustedStartStyle, double reversingShorteningFactor)
47 : DeclarativeAnimation(element, backingAnimation)
48 , m_property(property)
49 , m_generationTime(generationTime)
50 , m_targetStyle(RenderStyle::clonePtr(targetStyle))
51 , m_reversingAdjustedStartStyle(RenderStyle::clonePtr(reversingAdjustedStartStyle))
52 , m_reversingShorteningFactor(reversingShorteningFactor)
53{
54}
55
56void CSSTransition::resolve(RenderStyle& targetStyle)
57{
58 DeclarativeAnimation::resolve(targetStyle);
59 m_currentStyle = RenderStyle::clonePtr(targetStyle);
60}
61
62void CSSTransition::setTimingProperties(Seconds delay, Seconds duration)
63{
64 suspendEffectInvalidation();
65
66 // This method is only called from CSSTransition::create() where we're guaranteed to have an effect.
67 auto* animationEffect = effect();
68 ASSERT(animationEffect);
69
70 // In order for CSS Transitions to be seeked backwards, they need to have their fill mode set to backwards
71 // such that the original CSS value applied prior to the transition is used for a negative current time.
72 animationEffect->setFill(FillMode::Backwards);
73 animationEffect->setDelay(delay);
74 animationEffect->setIterationDuration(duration);
75
76 unsuspendEffectInvalidation();
77}
78
79} // namespace WebCore
80