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/*
* Copyright (C) 2007, 2012 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
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* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
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* its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "KeyframeAnimation.h"
#include "CSSAnimationControllerPrivate.h"
#include "CSSPropertyAnimation.h"
#include "CSSPropertyNames.h"
#include "CompositeAnimation.h"
#include "EventNames.h"
#include "GeometryUtilities.h"
#include "RenderBox.h"
#include "RenderStyle.h"
#include "StylePendingResources.h"
#include "StyleResolver.h"
#include "StyleScope.h"
#include "TranslateTransformOperation.h"
#include "WillChangeData.h"
namespace WebCore {
KeyframeAnimation::KeyframeAnimation(const Animation& animation, Element& element, CompositeAnimation& compositeAnimation, const RenderStyle& unanimatedStyle)
: AnimationBase(animation, element, compositeAnimation)
, m_keyframes(animation.name())
, m_unanimatedStyle(RenderStyle::clonePtr(unanimatedStyle))
{
resolveKeyframeStyles();
// Update the m_transformFunctionListValid flag based on whether the function lists in the keyframes match.
validateTransformFunctionList();
checkForMatchingFilterFunctionLists();
#if ENABLE(FILTERS_LEVEL_2)
checkForMatchingBackdropFilterFunctionLists();
#endif
checkForMatchingColorFilterFunctionLists();
for (auto propertyID : m_keyframes.properties()) {
if (WillChangeData::propertyCreatesStackingContext(propertyID))
m_triggersStackingContext = true;
if (CSSPropertyAnimation::animationOfPropertyIsAccelerated(propertyID))
m_hasAcceleratedProperty = true;
if (m_triggersStackingContext && m_hasAcceleratedProperty)
break;
}
computeLayoutDependency();
}
KeyframeAnimation::~KeyframeAnimation()
{
// Make sure to tell the renderer that we are ending. This will make sure any accelerated animations are removed.
if (!postActive())
endAnimation();
}
void KeyframeAnimation::computeLayoutDependency()
{
if (!m_keyframes.containsProperty(CSSPropertyTransform))
return;
size_t numKeyframes = m_keyframes.size();
for (size_t i = 0; i < numKeyframes; i++) {
auto* keyframeStyle = m_keyframes[i].style();
if (!keyframeStyle) {
ASSERT_NOT_REACHED();
continue;
}
if (keyframeStyle->hasTransform()) {
auto& transformOperations = keyframeStyle->transform();
for (const auto& operation : transformOperations.operations()) {
if (operation->isTranslateTransformOperationType()) {
auto translation = downcast<TranslateTransformOperation>(operation.get());
if (translation->x().isPercent() || translation->y().isPercent()) {
m_dependsOnLayout = true;
return;
}
}
}
}
}
}
void KeyframeAnimation::fetchIntervalEndpointsForProperty(CSSPropertyID property, const RenderStyle*& fromStyle, const RenderStyle*& toStyle, double& prog) const
{
size_t numKeyframes = m_keyframes.size();
if (!numKeyframes)
return;
// Find the first key
double elapsedTime = getElapsedTime();
if (m_animation->duration() && m_animation->iterationCount() != Animation::IterationCountInfinite)
elapsedTime = std::min(elapsedTime, m_animation->duration() * m_animation->iterationCount());
const double fractionalTime = this->fractionalTime(1, elapsedTime, 0);
ASSERT(!m_keyframes[0].key());
ASSERT(m_keyframes[m_keyframes.size() - 1].key() == 1);
int prevIndex = -1;
int nextIndex = -1;
// FIXME: with a lot of keys, this linear search will be slow. We could binary search.
for (size_t i = 0; i < numKeyframes; ++i) {
const KeyframeValue& currKeyFrame = m_keyframes[i];
if (!currKeyFrame.containsProperty(property))
continue;
if (fractionalTime < currKeyFrame.key()) {
nextIndex = i;
break;
}
prevIndex = i;
}
if (prevIndex == -1)
prevIndex = 0;
if (nextIndex == -1)
nextIndex = m_keyframes.size() - 1;
const KeyframeValue& prevKeyframe = m_keyframes[prevIndex];
const KeyframeValue& nextKeyframe = m_keyframes[nextIndex];
fromStyle = prevKeyframe.style();
toStyle = nextKeyframe.style();
double offset = prevKeyframe.key();
double scale = 1.0 / (nextIndex == prevIndex ? 1 : (nextKeyframe.key() - prevKeyframe.key()));
prog = progress(scale, offset, prevKeyframe.timingFunction());
}
OptionSet<AnimateChange> KeyframeAnimation::animate(CompositeAnimation& compositeAnimation, const RenderStyle& targetStyle, std::unique_ptr<RenderStyle>& animatedStyle)
{
AnimationState oldState = state();
// Update state and fire the start timeout if needed (FIXME: this function needs a better name).
fireAnimationEventsIfNeeded();
// If we have not yet started, we will not have a valid start time, so just start the animation if needed.
if (isNew()) {
if (m_animation->playState() == AnimationPlayState::Playing && !compositeAnimation.isSuspended())
updateStateMachine(AnimationStateInput::StartAnimation, -1);
else if (m_animation->playState() == AnimationPlayState::Paused)
updateStateMachine(AnimationStateInput::PlayStatePaused, -1);
}
// If we get this far and the animation is done, it means we are cleaning up a just-finished animation.
// If so, we need to send back the targetStyle.
if (postActive()) {
if (!animatedStyle)
animatedStyle = RenderStyle::clonePtr(targetStyle);
return { };
}
// If we are waiting for the start timer, we don't want to change the style yet.
// Special case 1 - if the delay time is 0, then we do want to set the first frame of the
// animation right away. This avoids a flash when the animation starts.
// Special case 2 - if there is a backwards fill mode, then we want to continue
// through to the style blend so that we get the fromStyle.
if (waitingToStart() && m_animation->delay() > 0 && !m_animation->fillsBackwards())
return { };
// If we have no keyframes, don't animate.
if (!m_keyframes.size()) {
updateStateMachine(AnimationStateInput::EndAnimation, -1);
return { };
}
// Run a cycle of animation.
// We know we will need a new render style, so make one if needed.
if (!animatedStyle)
animatedStyle = RenderStyle::clonePtr(targetStyle);
// FIXME: we need to be more efficient about determining which keyframes we are animating between.
// We should cache the last pair or something.
for (auto propertyID : m_keyframes.properties()) {
// Get the from/to styles and progress between
const RenderStyle* fromStyle = nullptr;
const RenderStyle* toStyle = nullptr;
double progress = 0;
fetchIntervalEndpointsForProperty(propertyID, fromStyle, toStyle, progress);
CSSPropertyAnimation::blendProperties(this, propertyID, animatedStyle.get(), fromStyle, toStyle, progress);
}
OptionSet<AnimateChange> change(AnimateChange::StyleBlended);
if (state() != oldState)
change.add(AnimateChange::StateChange);
if ((isPausedState(oldState) || isRunningState(oldState)) != (isPausedState(state()) || isRunningState(state())))
change.add(AnimateChange::RunningStateChange);
return change;
}
void KeyframeAnimation::getAnimatedStyle(std::unique_ptr<RenderStyle>& animatedStyle)
{
// If we're done, or in the delay phase and we're not backwards filling, tell the caller to use the current style.
if (postActive() || (waitingToStart() && m_animation->delay() > 0 && !m_animation->fillsBackwards()))
return;
if (!m_keyframes.size())
return;
if (!animatedStyle)
animatedStyle = RenderStyle::clonePtr(renderer()->style());
for (auto propertyID : m_keyframes.properties()) {
// Get the from/to styles and progress between
const RenderStyle* fromStyle = nullptr;
const RenderStyle* toStyle = nullptr;
double progress = 0;
fetchIntervalEndpointsForProperty(propertyID, fromStyle, toStyle, progress);
CSSPropertyAnimation::blendProperties(this, propertyID, animatedStyle.get(), fromStyle, toStyle, progress);
}
}
bool KeyframeAnimation::computeExtentOfTransformAnimation(LayoutRect& bounds) const
{
ASSERT(m_keyframes.containsProperty(CSSPropertyTransform));
if (!is<RenderBox>(renderer()))
return true; // Non-boxes don't get transformed;
auto& box = downcast<RenderBox>(*renderer());
auto rendererBox = snapRectToDevicePixels(box.borderBoxRect(), box.document().deviceScaleFactor());
auto cumulativeBounds = bounds;
for (auto& keyframe : m_keyframes.keyframes()) {
const RenderStyle* keyframeStyle = keyframe.style();
if (!keyframe.containsProperty(CSSPropertyTransform)) {
// If the first keyframe is missing transform style, use the current style.
if (!keyframe.key())
keyframeStyle = &box.style();
else
continue;
}
auto keyframeBounds = bounds;
bool canCompute;
if (transformFunctionListsMatch())
canCompute = computeTransformedExtentViaTransformList(rendererBox, *keyframeStyle, keyframeBounds);
else
canCompute = computeTransformedExtentViaMatrix(rendererBox, *keyframeStyle, keyframeBounds);
if (!canCompute)
return false;
cumulativeBounds.unite(keyframeBounds);
}
bounds = cumulativeBounds;
return true;
}
bool KeyframeAnimation::hasAnimationForProperty(CSSPropertyID property) const
{
return m_keyframes.containsProperty(property);
}
bool KeyframeAnimation::startAnimation(double timeOffset)
{
if (auto* renderer = this->renderer())
return renderer->startAnimation(timeOffset, m_animation, m_keyframes);
return false;
}
void KeyframeAnimation::pauseAnimation(double timeOffset)
{
if (!element())
return;
if (auto* renderer = this->renderer())
renderer->animationPaused(timeOffset, m_keyframes.animationName());
// Restore the original (unanimated) style
if (!paused())
setNeedsStyleRecalc(element());
}
void KeyframeAnimation::endAnimation(bool fillingForwards)
{
if (!element())
return;
if (auto* renderer = this->renderer())
renderer->animationFinished(m_keyframes.animationName());
// Restore the original (unanimated) style
if (!fillingForwards && !paused())
setNeedsStyleRecalc(element());
}
bool KeyframeAnimation::shouldSendEventForListener(Document::ListenerType listenerType) const
{
return element()->document().hasListenerType(listenerType);
}
void KeyframeAnimation::onAnimationStart(double elapsedTime)
{
sendAnimationEvent(eventNames().animationstartEvent, elapsedTime);
}
void KeyframeAnimation::onAnimationIteration(double elapsedTime)
{
sendAnimationEvent(eventNames().animationiterationEvent, elapsedTime);
}
void KeyframeAnimation::onAnimationEnd(double elapsedTime)
{
sendAnimationEvent(eventNames().animationendEvent, elapsedTime);
endAnimation(m_animation->fillsForwards());
}
bool KeyframeAnimation::sendAnimationEvent(const AtomString& eventType, double elapsedTime)
{
Document::ListenerType listenerType;
if (eventType == eventNames().webkitAnimationIterationEvent || eventType == eventNames().animationiterationEvent)
listenerType = Document::ANIMATIONITERATION_LISTENER;
else if (eventType == eventNames().webkitAnimationEndEvent || eventType == eventNames().animationendEvent)
listenerType = Document::ANIMATIONEND_LISTENER;
else {
ASSERT(eventType == eventNames().webkitAnimationStartEvent || eventType == eventNames().animationstartEvent);
if (m_startEventDispatched)
return false;
m_startEventDispatched = true;
listenerType = Document::ANIMATIONSTART_LISTENER;
}
if (shouldSendEventForListener(listenerType)) {
// Dispatch the event
auto element = makeRefPtr(this->element());
ASSERT(!element || element->document().backForwardCacheState() == Document::NotInBackForwardCache);
if (!element)
return false;
// Schedule event handling
m_compositeAnimation->animationController().addEventToDispatch(*element, eventType, m_keyframes.animationName(), elapsedTime);
// Restore the original (unanimated) style
if ((eventType == eventNames().webkitAnimationEndEvent || eventType == eventNames().animationendEvent) && element->renderer())
setNeedsStyleRecalc(element.get());
return true; // Did dispatch an event
}
return false; // Did not dispatch an event
}
void KeyframeAnimation::overrideAnimations()
{
// This will override implicit animations that match the properties in the keyframe animation
for (auto propertyID : m_keyframes.properties())
compositeAnimation()->overrideImplicitAnimations(propertyID);
}
void KeyframeAnimation::resumeOverriddenAnimations()
{
// This will resume overridden implicit animations
for (auto propertyID : m_keyframes.properties())
compositeAnimation()->resumeOverriddenImplicitAnimations(propertyID);
}
bool KeyframeAnimation::affectsProperty(CSSPropertyID property) const
{
return m_keyframes.containsProperty(property);
}
void KeyframeAnimation::resolveKeyframeStyles()
{
if (!element())
return;
if (auto* styleScope = Style::Scope::forOrdinal(*element(), m_animation->nameStyleScopeOrdinal()))
styleScope->resolver().keyframeStylesForAnimation(*element(), m_unanimatedStyle.get(), m_keyframes);
// Ensure resource loads for all the frames.
for (auto& keyframe : m_keyframes.keyframes()) {
if (auto* style = const_cast<RenderStyle*>(keyframe.style()))
Style::loadPendingResources(*style, element()->document(), element());
}
}
void KeyframeAnimation::validateTransformFunctionList()
{
m_transformFunctionListsMatch = false;
if (m_keyframes.size() < 2 || !m_keyframes.containsProperty(CSSPropertyTransform))
return;
// Empty transforms match anything, so find the first non-empty entry as the reference
size_t numKeyframes = m_keyframes.size();
size_t firstNonEmptyTransformKeyframeIndex = numKeyframes;
for (size_t i = 0; i < numKeyframes; ++i) {
const KeyframeValue& currentKeyframe = m_keyframes[i];
if (currentKeyframe.style()->transform().operations().size()) {
firstNonEmptyTransformKeyframeIndex = i;
break;
}
}
if (firstNonEmptyTransformKeyframeIndex == numKeyframes)
return;
const TransformOperations* firstVal = &m_keyframes[firstNonEmptyTransformKeyframeIndex].style()->transform();
// See if the keyframes are valid
for (size_t i = firstNonEmptyTransformKeyframeIndex + 1; i < numKeyframes; ++i) {
const KeyframeValue& currentKeyframe = m_keyframes[i];
const TransformOperations* val = &currentKeyframe.style()->transform();
// An emtpy transform list matches anything.
if (val->operations().isEmpty())
continue;
if (!firstVal->operationsMatch(*val))
return;
}
m_transformFunctionListsMatch = true;
}
bool KeyframeAnimation::checkForMatchingFilterFunctionLists(CSSPropertyID propertyID, const std::function<const FilterOperations& (const RenderStyle&)>& filtersGetter) const
{
if (m_keyframes.size() < 2 || !m_keyframes.containsProperty(propertyID))
return false;
// Empty filters match anything, so find the first non-empty entry as the reference
size_t numKeyframes = m_keyframes.size();
size_t firstNonEmptyKeyframeIndex = numKeyframes;
for (size_t i = 0; i < numKeyframes; ++i) {
if (filtersGetter(*m_keyframes[i].style()).operations().size()) {
firstNonEmptyKeyframeIndex = i;
break;
}
}
if (firstNonEmptyKeyframeIndex == numKeyframes)
return false;
auto& firstVal = filtersGetter(*m_keyframes[firstNonEmptyKeyframeIndex].style());
for (size_t i = firstNonEmptyKeyframeIndex + 1; i < numKeyframes; ++i) {
auto& value = filtersGetter(*m_keyframes[i].style());
// An emtpy filter list matches anything.
if (value.operations().isEmpty())
continue;
if (!firstVal.operationsMatch(value))
return false;
}
return true;
}
void KeyframeAnimation::checkForMatchingFilterFunctionLists()
{
m_filterFunctionListsMatch = checkForMatchingFilterFunctionLists(CSSPropertyFilter, [] (const RenderStyle& style) -> const FilterOperations& {
return style.filter();
});
}
#if ENABLE(FILTERS_LEVEL_2)
void KeyframeAnimation::checkForMatchingBackdropFilterFunctionLists()
{
m_backdropFilterFunctionListsMatch = checkForMatchingFilterFunctionLists(CSSPropertyWebkitBackdropFilter, [] (const RenderStyle& style) -> const FilterOperations& {
return style.backdropFilter();
});
}
#endif
void KeyframeAnimation::checkForMatchingColorFilterFunctionLists()
{
m_colorFilterFunctionListsMatch = checkForMatchingFilterFunctionLists(CSSPropertyAppleColorFilter, [] (const RenderStyle& style) -> const FilterOperations& {
return style.appleColorFilter();
});
}
Optional<Seconds> KeyframeAnimation::timeToNextService()
{
Optional<Seconds> t = AnimationBase::timeToNextService();
if (!t || t.value() != 0_s || preActive())
return t;
// A return value of 0 means we need service. But if we only have accelerated animations we
// only need service at the end of the transition.
bool acceleratedPropertiesOnly = true;
for (auto propertyID : m_keyframes.properties()) {
if (!CSSPropertyAnimation::animationOfPropertyIsAccelerated(propertyID) || !isAccelerated()) {
acceleratedPropertiesOnly = false;
break;
}
}
if (acceleratedPropertiesOnly) {
bool isLooping;
getTimeToNextEvent(t.value(), isLooping);
}
return t;
}
} // namespace WebCore