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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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* notice, this list of conditions and the following disclaimer in the
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* 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of
* 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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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "KeyframeAnimation.h"
#include "AnimationControllerPrivate.h"
#include "CSSPropertyAnimation.h"
#include "CSSPropertyNames.h"
#include "CompositeAnimation.h"
#include "EventNames.h"
#include "RenderBoxModelObject.h"
#include "RenderStyle.h"
#include "StyleResolver.h"
using namespace std;
namespace WebCore {
KeyframeAnimation::KeyframeAnimation(const Animation* animation, RenderObject* renderer, int index, CompositeAnimation* compAnim, RenderStyle* unanimatedStyle)
: AnimationBase(animation, renderer, compAnim)
, m_keyframes(renderer, animation->name())
, m_index(index)
, m_startEventDispatched(false)
, m_unanimatedStyle(unanimatedStyle)
{
// Get the keyframe RenderStyles
if (m_object && m_object->node() && m_object->node()->isElementNode())
m_object->document()->ensureStyleResolver()->keyframeStylesForAnimation(toElement(m_object->node()), unanimatedStyle, m_keyframes);
// Update the m_transformFunctionListValid flag based on whether the function lists in the keyframes match.
validateTransformFunctionList();
#if ENABLE(CSS_FILTERS)
checkForMatchingFilterFunctionLists();
#endif
}
KeyframeAnimation::~KeyframeAnimation()
{
// Make sure to tell the renderer that we are ending. This will make sure any accelerated animations are removed.
if (!postActive())
endAnimation();
}
static const Animation* getAnimationFromStyleByName(const RenderStyle* style, const AtomicString& name)
{
if (!style->animations())
return 0;
for (size_t i = 0; i < style->animations()->size(); i++) {
if (name == style->animations()->animation(i)->name())
return style->animations()->animation(i);
}
return 0;
}
void KeyframeAnimation::fetchIntervalEndpointsForProperty(CSSPropertyID property, const RenderStyle*& fromStyle, const RenderStyle*& toStyle, double& prog) const
{
// Find the first key
double elapsedTime = getElapsedTime();
if (m_animation->duration() && m_animation->iterationCount() != Animation::IterationCountInfinite)
elapsedTime = min(elapsedTime, m_animation->duration() * m_animation->iterationCount());
const double fractionalTime = this->fractionalTime(1, elapsedTime, 0);
size_t numKeyframes = m_keyframes.size();
if (!numKeyframes)
return;
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;
}
double scale = 1;
double offset = 0;
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();
offset = prevKeyframe.key();
scale = 1.0 / (nextKeyframe.key() - prevKeyframe.key());
const TimingFunction* timingFunction = 0;
if (const Animation* matchedAnimation = getAnimationFromStyleByName(fromStyle, name()))
timingFunction = matchedAnimation->timingFunction().get();
prog = progress(scale, offset, timingFunction);
}
void KeyframeAnimation::animate(CompositeAnimation* compositeAnimation, RenderObject*, const RenderStyle*, RenderStyle* targetStyle, RefPtr<RenderStyle>& animatedStyle)
{
// Fire the start timeout if needed
fireAnimationEventsIfNeeded();
// If we have not yet started, we will not have a valid start time, so just start the animation if needed.
if (isNew() && m_animation->playState() == AnimPlayStatePlaying && !compositeAnimation->isSuspended())
updateStateMachine(AnimationStateInputStartAnimation, -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 = const_cast<RenderStyle*>(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(AnimationStateInputEndAnimation, -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::clone(targetStyle);
// FIXME: we need to be more efficient about determining which keyframes we are animating between.
// We should cache the last pair or something.
HashSet<CSSPropertyID>::const_iterator endProperties = m_keyframes.endProperties();
for (HashSet<CSSPropertyID>::const_iterator it = m_keyframes.beginProperties(); it != endProperties; ++it) {
// Get the from/to styles and progress between
const RenderStyle* fromStyle = 0;
const RenderStyle* toStyle = 0;
double progress = 0.0;
fetchIntervalEndpointsForProperty(*it, fromStyle, toStyle, progress);
#if USE(ACCELERATED_COMPOSITING)
bool needsAnim = CSSPropertyAnimation::blendProperties(this, *it, animatedStyle.get(), fromStyle, toStyle, progress);
if (!needsAnim)
// If we are running an accelerated animation, set a flag in the style
// to indicate it. This can be used to make sure we get an updated
// style for hit testing, etc.
animatedStyle->setIsRunningAcceleratedAnimation();
#endif
}
}
void KeyframeAnimation::getAnimatedStyle(RefPtr<RenderStyle>& animatedStyle)
{
// If we're in the delay phase and we're not backwards filling, tell the caller
// to use the current style.
if (waitingToStart() && m_animation->delay() > 0 && !m_animation->fillsBackwards())
return;
if (!m_keyframes.size())
return;
if (!animatedStyle)
animatedStyle = RenderStyle::clone(m_object->style());
HashSet<CSSPropertyID>::const_iterator endProperties = m_keyframes.endProperties();
for (HashSet<CSSPropertyID>::const_iterator it = m_keyframes.beginProperties(); it != endProperties; ++it) {
// Get the from/to styles and progress between
const RenderStyle* fromStyle = 0;
const RenderStyle* toStyle = 0;
double progress = 0.0;
fetchIntervalEndpointsForProperty(*it, fromStyle, toStyle, progress);
CSSPropertyAnimation::blendProperties(this, *it, animatedStyle.get(), fromStyle, toStyle, progress);
}
}
bool KeyframeAnimation::hasAnimationForProperty(CSSPropertyID property) const
{
return m_keyframes.containsProperty(property);
}
bool KeyframeAnimation::startAnimation(double timeOffset)
{
#if USE(ACCELERATED_COMPOSITING)
if (m_object && m_object->isComposited()) {
return toRenderBoxModelObject(m_object)->startAnimation(timeOffset, m_animation.get(), m_keyframes);
}
#else
UNUSED_PARAM(timeOffset);
#endif
return false;
}
void KeyframeAnimation::pauseAnimation(double timeOffset)
{
if (!m_object)
return;
#if USE(ACCELERATED_COMPOSITING)
if (m_object->isComposited())
toRenderBoxModelObject(m_object)->animationPaused(timeOffset, m_keyframes.animationName());
#else
UNUSED_PARAM(timeOffset);
#endif
// Restore the original (unanimated) style
if (!paused())
setNeedsStyleRecalc(m_object->node());
}
void KeyframeAnimation::endAnimation()
{
if (!m_object)
return;
#if USE(ACCELERATED_COMPOSITING)
if (m_object->isComposited())
toRenderBoxModelObject(m_object)->animationFinished(m_keyframes.animationName());
#endif
// Restore the original (unanimated) style
if (!paused())
setNeedsStyleRecalc(m_object->node());
}
bool KeyframeAnimation::shouldSendEventForListener(Document::ListenerType listenerType) const
{
return m_object->document()->hasListenerType(listenerType);
}
void KeyframeAnimation::onAnimationStart(double elapsedTime)
{
sendAnimationEvent(eventNames().webkitAnimationStartEvent, elapsedTime);
}
void KeyframeAnimation::onAnimationIteration(double elapsedTime)
{
sendAnimationEvent(eventNames().webkitAnimationIterationEvent, elapsedTime);
}
void KeyframeAnimation::onAnimationEnd(double elapsedTime)
{
sendAnimationEvent(eventNames().webkitAnimationEndEvent, elapsedTime);
// End the animation if we don't fill forwards. Forward filling
// animations are ended properly in the class destructor.
if (!m_animation->fillsForwards())
endAnimation();
}
bool KeyframeAnimation::sendAnimationEvent(const AtomicString& eventType, double elapsedTime)
{
Document::ListenerType listenerType;
if (eventType == eventNames().webkitAnimationIterationEvent)
listenerType = Document::ANIMATIONITERATION_LISTENER;
else if (eventType == eventNames().webkitAnimationEndEvent)
listenerType = Document::ANIMATIONEND_LISTENER;
else {
ASSERT(eventType == eventNames().webkitAnimationStartEvent);
if (m_startEventDispatched)
return false;
m_startEventDispatched = true;
listenerType = Document::ANIMATIONSTART_LISTENER;
}
if (shouldSendEventForListener(listenerType)) {
// Dispatch the event
RefPtr<Element> element;
if (m_object->node() && m_object->node()->isElementNode())
element = toElement(m_object->node());
ASSERT(!element || (element->document() && !element->document()->inPageCache()));
if (!element)
return false;
// Schedule event handling
m_compAnim->animationController()->addEventToDispatch(element, eventType, m_keyframes.animationName(), elapsedTime);
// Restore the original (unanimated) style
if (eventType == eventNames().webkitAnimationEndEvent && 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
HashSet<CSSPropertyID>::const_iterator end = m_keyframes.endProperties();
for (HashSet<CSSPropertyID>::const_iterator it = m_keyframes.beginProperties(); it != end; ++it)
compositeAnimation()->overrideImplicitAnimations(*it);
}
void KeyframeAnimation::resumeOverriddenAnimations()
{
// This will resume overridden implicit animations
HashSet<CSSPropertyID>::const_iterator end = m_keyframes.endProperties();
for (HashSet<CSSPropertyID>::const_iterator it = m_keyframes.beginProperties(); it != end; ++it)
compositeAnimation()->resumeOverriddenImplicitAnimations(*it);
}
bool KeyframeAnimation::affectsProperty(CSSPropertyID property) const
{
return m_keyframes.containsProperty(property);
}
void KeyframeAnimation::validateTransformFunctionList()
{
m_transformFunctionListValid = false;
if (m_keyframes.size() < 2 || !m_keyframes.containsProperty(CSSPropertyWebkitTransform))
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;
}
// Keyframes are valid
m_transformFunctionListValid = true;
}
#if ENABLE(CSS_FILTERS)
void KeyframeAnimation::checkForMatchingFilterFunctionLists()
{
m_filterFunctionListsMatch = false;
if (m_keyframes.size() < 2 || !m_keyframes.containsProperty(CSSPropertyWebkitFilter))
return;
// Empty filters match anything, so find the first non-empty entry as the reference
size_t numKeyframes = m_keyframes.size();
size_t firstNonEmptyFilterKeyframeIndex = numKeyframes;
for (size_t i = 0; i < numKeyframes; ++i) {
const KeyframeValue& currentKeyframe = m_keyframes[i];
if (currentKeyframe.style()->filter().operations().size()) {
firstNonEmptyFilterKeyframeIndex = i;
break;
}
}
if (firstNonEmptyFilterKeyframeIndex == numKeyframes)
return;
const FilterOperations* firstVal = &m_keyframes[firstNonEmptyFilterKeyframeIndex].style()->filter();
for (size_t i = firstNonEmptyFilterKeyframeIndex + 1; i < numKeyframes; ++i) {
const KeyframeValue& currentKeyframe = m_keyframes[i];
const FilterOperations* val = &currentKeyframe.style()->filter();
// An emtpy filter list matches anything.
if (val->operations().isEmpty())
continue;
if (!firstVal->operationsMatch(*val))
return;
}
m_filterFunctionListsMatch = true;
}
#endif
double KeyframeAnimation::timeToNextService()
{
double t = AnimationBase::timeToNextService();
#if USE(ACCELERATED_COMPOSITING)
if (t != 0 || 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
HashSet<CSSPropertyID>::const_iterator endProperties = m_keyframes.endProperties();
bool acceleratedPropertiesOnly = true;
for (HashSet<CSSPropertyID>::const_iterator it = m_keyframes.beginProperties(); it != endProperties; ++it) {
if (!CSSPropertyAnimation::animationOfPropertyIsAccelerated(*it) || !isAccelerated()) {
acceleratedPropertiesOnly = false;
break;
}
}
if (acceleratedPropertiesOnly) {
bool isLooping;
getTimeToNextEvent(t, isLooping);
}
#endif
return t;
}
} // namespace WebCore