diff -r 000000000000 -r 4f2f89ce4247 WebCore/page/animation/KeyframeAnimation.cpp
--- /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