--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/WebCore/page/animation/KeyframeAnimation.cpp Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,417 @@
+/*
+ * Copyright (C) 2007 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
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 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
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+#include "KeyframeAnimation.h"
+
+#include "AnimationControllerPrivate.h"
+#include "CSSPropertyNames.h"
+#include "CSSStyleSelector.h"
+#include "CompositeAnimation.h"
+#include "EventNames.h"
+#include "RenderLayer.h"
+#include "RenderLayerBacking.h"
+#include "RenderStyle.h"
+#include <wtf/UnusedParam.h>
+
+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_unanimatedStyle(unanimatedStyle)
+{
+ // Get the keyframe RenderStyles
+ if (m_object && m_object->node() && m_object->node()->isElementNode())
+ m_object->document()->styleSelector()->keyframeStylesForAnimation(static_cast<Element*>(m_object->node()), unanimatedStyle, m_keyframes);
+
+ // Update the m_transformFunctionListValid flag based on whether the function lists in the keyframes match.
+ validateTransformFunctionList();
+}
+
+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::getKeyframeAnimationInterval(const RenderStyle*& fromStyle, const RenderStyle*& toStyle, double& prog) const
+{
+ // Find the first key
+ double elapsedTime = getElapsedTime();
+
+ double t = m_animation->duration() ? (elapsedTime / m_animation->duration()) : 1;
+
+ ASSERT(t >= 0);
+ if (t < 0)
+ t = 0;
+
+ int i = static_cast<int>(t);
+ t -= i;
+ if (m_animation->direction() && (i & 1))
+ t = 1 - t;
+
+ double scale = 1;
+ double offset = 0;
+ Vector<KeyframeValue>::const_iterator endKeyframes = m_keyframes.endKeyframes();
+ for (Vector<KeyframeValue>::const_iterator it = m_keyframes.beginKeyframes(); it != endKeyframes; ++it) {
+ if (t < it->key()) {
+ // The first key should always be 0, so we should never succeed on the first key
+ if (!fromStyle)
+ break;
+ scale = 1.0 / (it->key() - offset);
+ toStyle = it->style();
+ break;
+ }
+
+ offset = it->key();
+ fromStyle = it->style();
+ }
+
+ if (!fromStyle || !toStyle)
+ return;
+
+ const TimingFunction* timingFunction = 0;
+ if (fromStyle->animations() && fromStyle->animations()->size() > 0) {
+ // We get the timing function from the first animation, because we've synthesized a RenderStyle for each keyframe.
+ timingFunction = &(fromStyle->animations()->animation(0)->timingFunction());
+ }
+
+ prog = progress(scale, offset, timingFunction);
+}
+
+void KeyframeAnimation::animate(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)
+ 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;
+
+ // FIXME: we need to be more efficient about determining which keyframes we are animating between.
+ // We should cache the last pair or something.
+
+ // Get the from/to styles and progress between
+ const RenderStyle* fromStyle = 0;
+ const RenderStyle* toStyle = 0;
+ double progress;
+ getKeyframeAnimationInterval(fromStyle, toStyle, progress);
+
+ // If either style is 0 we have an invalid case, just stop the animation.
+ if (!fromStyle || !toStyle) {
+ 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);
+
+ HashSet<int>::const_iterator endProperties = m_keyframes.endProperties();
+ for (HashSet<int>::const_iterator it = m_keyframes.beginProperties(); it != endProperties; ++it) {
+ bool needsAnim = blendProperties(this, *it, animatedStyle.get(), fromStyle, toStyle, progress);
+ if (needsAnim)
+ setAnimating();
+ else {
+#if USE(ACCELERATED_COMPOSITING)
+ // 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;
+
+ // Get the from/to styles and progress between
+ const RenderStyle* fromStyle = 0;
+ const RenderStyle* toStyle = 0;
+ double progress;
+ getKeyframeAnimationInterval(fromStyle, toStyle, progress);
+
+ // If either style is 0 we have an invalid case
+ if (!fromStyle || !toStyle)
+ return;
+
+ if (!animatedStyle)
+ animatedStyle = RenderStyle::clone(m_object->style());
+
+ HashSet<int>::const_iterator endProperties = m_keyframes.endProperties();
+ for (HashSet<int>::const_iterator it = m_keyframes.beginProperties(); it != endProperties; ++it)
+ blendProperties(this, *it, animatedStyle.get(), fromStyle, toStyle, progress);
+}
+
+bool KeyframeAnimation::hasAnimationForProperty(int property) const
+{
+ HashSet<int>::const_iterator end = m_keyframes.endProperties();
+ for (HashSet<int>::const_iterator it = m_keyframes.beginProperties(); it != end; ++it) {
+ if (*it == property)
+ return true;
+ }
+
+ return false;
+}
+
+bool KeyframeAnimation::startAnimation(double timeOffset)
+{
+#if USE(ACCELERATED_COMPOSITING)
+ if (m_object && m_object->hasLayer()) {
+ RenderLayer* layer = toRenderBoxModelObject(m_object)->layer();
+ if (layer->isComposited())
+ return layer->backing()->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->hasLayer()) {
+ RenderLayer* layer = toRenderBoxModelObject(m_object)->layer();
+ if (layer->isComposited())
+ layer->backing()->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->hasLayer()) {
+ RenderLayer* layer = toRenderBoxModelObject(m_object)->layer();
+ if (layer->isComposited())
+ layer->backing()->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);
+ listenerType = Document::ANIMATIONSTART_LISTENER;
+ }
+
+ if (shouldSendEventForListener(listenerType)) {
+ // Dispatch the event
+ RefPtr<Element> element;
+ if (m_object->node() && m_object->node()->isElementNode())
+ element = static_cast<Element*>(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<int>::const_iterator end = m_keyframes.endProperties();
+ for (HashSet<int>::const_iterator it = m_keyframes.beginProperties(); it != end; ++it)
+ compositeAnimation()->overrideImplicitAnimations(*it);
+}
+
+void KeyframeAnimation::resumeOverriddenAnimations()
+{
+ // This will resume overridden implicit animations
+ HashSet<int>::const_iterator end = m_keyframes.endProperties();
+ for (HashSet<int>::const_iterator it = m_keyframes.beginProperties(); it != end; ++it)
+ compositeAnimation()->resumeOverriddenImplicitAnimations(*it);
+}
+
+bool KeyframeAnimation::affectsProperty(int property) const
+{
+ HashSet<int>::const_iterator end = m_keyframes.endProperties();
+ for (HashSet<int>::const_iterator it = m_keyframes.beginProperties(); it != end; ++it) {
+ if (*it == property)
+ return true;
+ }
+ return false;
+}
+
+void KeyframeAnimation::validateTransformFunctionList()
+{
+ m_transformFunctionListValid = false;
+
+ if (m_keyframes.size() < 2 || !m_keyframes.containsProperty(CSSPropertyWebkitTransform))
+ return;
+
+ Vector<KeyframeValue>::const_iterator end = m_keyframes.endKeyframes();
+
+ // Empty transforms match anything, so find the first non-empty entry as the reference
+ size_t firstIndex = 0;
+ Vector<KeyframeValue>::const_iterator firstIt = end;
+
+ for (Vector<KeyframeValue>::const_iterator it = m_keyframes.beginKeyframes(); it != end; ++it, ++firstIndex) {
+ if (it->style()->transform().operations().size() > 0) {
+ firstIt = it;
+ break;
+ }
+ }
+
+ if (firstIt == end)
+ return;
+
+ const TransformOperations* firstVal = &firstIt->style()->transform();
+
+ // See if the keyframes are valid
+ for (Vector<KeyframeValue>::const_iterator it = firstIt+1; it != end; ++it) {
+ const TransformOperations* val = &it->style()->transform();
+
+ // A null transform matches anything
+ if (val->operations().isEmpty())
+ continue;
+
+ // If the sizes of the function lists don't match, the lists don't match
+ if (firstVal->operations().size() != val->operations().size())
+ return;
+
+ // If the types of each function are not the same, the lists don't match
+ for (size_t j = 0; j < firstVal->operations().size(); ++j) {
+ if (!firstVal->operations()[j]->isSameType(*val->operations()[j]))
+ return;
+ }
+ }
+
+ // Keyframes are valid
+ m_transformFunctionListValid = true;
+}
+
+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<int>::const_iterator endProperties = m_keyframes.endProperties();
+ bool acceleratedPropertiesOnly = true;
+
+ for (HashSet<int>::const_iterator it = m_keyframes.beginProperties(); it != endProperties; ++it) {
+ if (!animationOfPropertyIsAccelerated(*it) || !isAccelerated()) {
+ acceleratedPropertiesOnly = false;
+ break;
+ }
+ }
+
+ if (acceleratedPropertiesOnly) {
+ bool isLooping;
+ getTimeToNextEvent(t, isLooping);
+ }
+#endif
+ return t;
+}
+
+} // namespace WebCore