diff -r 000000000000 -r 4f2f89ce4247 WebCore/page/animation/CompositeAnimation.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/WebCore/page/animation/CompositeAnimation.cpp	Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,549 @@
+/*
+ * 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 "CompositeAnimation.h"
+
+#include "AnimationControllerPrivate.h"
+#include "CSSPropertyNames.h"
+#include "ImplicitAnimation.h"
+#include "KeyframeAnimation.h"
+#include "RenderObject.h"
+#include "RenderStyle.h"
+
+namespace WebCore {
+
+CompositeAnimation::~CompositeAnimation()
+{
+    // Toss the refs to all animations
+    m_transitions.clear();
+    m_keyframeAnimations.clear();
+}
+
+void CompositeAnimation::clearRenderer()
+{
+    if (!m_transitions.isEmpty()) {
+        // Clear the renderers from all running animations, in case we are in the middle of
+        // an animation callback (see https://bugs.webkit.org/show_bug.cgi?id=22052)
+        CSSPropertyTransitionsMap::const_iterator transitionsEnd = m_transitions.end();
+        for (CSSPropertyTransitionsMap::const_iterator it = m_transitions.begin(); it != transitionsEnd; ++it) {
+            ImplicitAnimation* transition = it->second.get();
+            transition->clearRenderer();
+        }
+    }
+    if (!m_keyframeAnimations.isEmpty()) {
+        m_keyframeAnimations.checkConsistency();
+        AnimationNameMap::const_iterator animationsEnd = m_keyframeAnimations.end();
+        for (AnimationNameMap::const_iterator it = m_keyframeAnimations.begin(); it != animationsEnd; ++it) {
+            KeyframeAnimation* anim = it->second.get();
+            anim->clearRenderer();
+        }
+    }
+}
+
+void CompositeAnimation::updateTransitions(RenderObject* renderer, RenderStyle* currentStyle, RenderStyle* targetStyle)
+{
+    // If currentStyle is null or there are no old or new transitions, just skip it
+    if (!currentStyle || (!targetStyle->transitions() && m_transitions.isEmpty()))
+        return;
+
+    // Mark all existing transitions as no longer active. We will mark the still active ones
+    // in the next loop and then toss the ones that didn't get marked.
+    CSSPropertyTransitionsMap::const_iterator end = m_transitions.end();
+    for (CSSPropertyTransitionsMap::const_iterator it = m_transitions.begin(); it != end; ++it)
+        it->second->setActive(false);
+        
+    RefPtr<RenderStyle> modifiedCurrentStyle;
+    
+    // Check to see if we need to update the active transitions
+    if (targetStyle->transitions()) {
+        for (size_t i = 0; i < targetStyle->transitions()->size(); ++i) {
+            const Animation* anim = targetStyle->transitions()->animation(i);
+            bool isActiveTransition = anim->duration() || anim->delay() > 0;
+
+            int prop = anim->property();
+
+            if (prop == cAnimateNone)
+                continue;
+
+            bool all = prop == cAnimateAll;
+
+            // Handle both the 'all' and single property cases. For the single prop case, we make only one pass
+            // through the loop.
+            for (int propertyIndex = 0; propertyIndex < AnimationBase::getNumProperties(); ++propertyIndex) {
+                if (all) {
+                    // Get the next property which is not a shorthand.
+                    bool isShorthand;
+                    prop = AnimationBase::getPropertyAtIndex(propertyIndex, isShorthand);
+                    if (isShorthand)
+                        continue;
+                }
+
+                // ImplicitAnimations are always hashed by actual properties, never cAnimateAll
+                ASSERT(prop >= firstCSSProperty && prop < (firstCSSProperty + numCSSProperties));
+
+                // If there is a running animation for this property, the transition is overridden
+                // and we have to use the unanimatedStyle from the animation. We do the test
+                // against the unanimated style here, but we "override" the transition later.
+                RefPtr<KeyframeAnimation> keyframeAnim = getAnimationForProperty(prop);
+                RenderStyle* fromStyle = keyframeAnim ? keyframeAnim->unanimatedStyle() : currentStyle;
+
+                // See if there is a current transition for this prop
+                ImplicitAnimation* implAnim = m_transitions.get(prop).get();
+                bool equal = true;
+
+                if (implAnim) {
+                    // If we are post active don't bother setting the active flag. This will cause
+                    // this animation to get removed at the end of this function.
+                    if (!implAnim->postActive())
+                        implAnim->setActive(true);
+                    
+                    // This might be a transition that is just finishing. That would be the case
+                    // if it were postActive. But we still need to check for equality because
+                    // it could be just finishing AND changing to a new goal state.
+                    //
+                    // This implAnim might also not be an already running transition. It might be
+                    // newly added to the list in a previous iteration. This would happen if
+                    // you have both an explicit transition-property and 'all' in the same
+                    // list. In this case, the latter one overrides the earlier one, so we
+                    // behave as though this is a running animation being replaced.
+                    if (!implAnim->isTargetPropertyEqual(prop, targetStyle)) {
+    #if USE(ACCELERATED_COMPOSITING)
+                        // For accelerated animations we need to return a new RenderStyle with the _current_ value
+                        // of the property, so that restarted transitions use the correct starting point.
+                        if (AnimationBase::animationOfPropertyIsAccelerated(prop) && implAnim->isAccelerated()) {
+                            if (!modifiedCurrentStyle)
+                                modifiedCurrentStyle = RenderStyle::clone(currentStyle);
+
+                            implAnim->blendPropertyValueInStyle(prop, modifiedCurrentStyle.get());
+                        }
+    #endif
+                        m_transitions.remove(prop);
+                        equal = false;
+                    }
+                } else {
+                    // We need to start a transition if it is active and the properties don't match
+                    equal = !isActiveTransition || AnimationBase::propertiesEqual(prop, fromStyle, targetStyle);
+                }
+
+                // We can be in this loop with an inactive transition (!isActiveTransition). We need
+                // to do that to check to see if we are canceling a transition. But we don't want to
+                // start one of the inactive transitions. So short circuit that here. (See
+                // <https://bugs.webkit.org/show_bug.cgi?id=24787>
+                if (!equal && isActiveTransition) {
+                    // Add the new transition
+                    m_transitions.set(prop, ImplicitAnimation::create(const_cast<Animation*>(anim), prop, renderer, this, modifiedCurrentStyle ? modifiedCurrentStyle.get() : fromStyle));
+                }
+                
+                // We only need one pass for the single prop case
+                if (!all)
+                    break;
+            }
+        }
+    }
+
+    // Make a list of transitions to be removed
+    Vector<int> toBeRemoved;
+    end = m_transitions.end();
+    for (CSSPropertyTransitionsMap::const_iterator it = m_transitions.begin(); it != end; ++it) {
+        ImplicitAnimation* anim = it->second.get();
+        if (!anim->active())
+            toBeRemoved.append(anim->animatingProperty());
+    }
+
+    // Now remove the transitions from the list
+    for (size_t j = 0; j < toBeRemoved.size(); ++j)
+        m_transitions.remove(toBeRemoved[j]);
+}
+
+void CompositeAnimation::updateKeyframeAnimations(RenderObject* renderer, RenderStyle* currentStyle, RenderStyle* targetStyle)
+{
+    // Nothing to do if we don't have any animations, and didn't have any before
+    if (m_keyframeAnimations.isEmpty() && !targetStyle->hasAnimations())
+        return;
+
+    m_keyframeAnimations.checkConsistency();
+
+    AnimationNameMap::const_iterator kfend = m_keyframeAnimations.end();
+    
+    if (currentStyle && currentStyle->hasAnimations() && targetStyle->hasAnimations() && *(currentStyle->animations()) == *(targetStyle->animations())) {
+        // The current and target animations are the same so we just need to toss any 
+        // animation which is finished (postActive).
+        for (AnimationNameMap::const_iterator it = m_keyframeAnimations.begin(); it != kfend; ++it) {
+            if (it->second->postActive())
+                it->second->setIndex(-1);
+        }
+    } else {
+        // Mark all existing animations as no longer active.
+        for (AnimationNameMap::const_iterator it = m_keyframeAnimations.begin(); it != kfend; ++it)
+            it->second->setIndex(-1);
+            
+        // Toss the animation order map.
+        m_keyframeAnimationOrderMap.clear();
+
+        DEFINE_STATIC_LOCAL(const AtomicString, none, ("none"));
+        
+        // Now mark any still active animations as active and add any new animations.
+        if (targetStyle->animations()) {
+            int numAnims = targetStyle->animations()->size();
+            for (int i = 0; i < numAnims; ++i) {
+                const Animation* anim = targetStyle->animations()->animation(i);
+                AtomicString animationName(anim->name());
+
+                if (!anim->isValidAnimation())
+                    continue;
+                
+                // See if there is a current animation for this name.
+                RefPtr<KeyframeAnimation> keyframeAnim = m_keyframeAnimations.get(animationName.impl());
+                
+                if (keyframeAnim) {
+                    // If this animation is postActive, skip it so it gets removed at the end of this function.
+                    if (keyframeAnim->postActive())
+                        continue;
+                    
+                    // This one is still active.
+
+                    // Animations match, but play states may differ. Update if needed.
+                    keyframeAnim->updatePlayState(anim->playState() == AnimPlayStatePlaying);
+                                
+                    // Set the saved animation to this new one, just in case the play state has changed.
+                    keyframeAnim->setAnimation(anim);
+                    keyframeAnim->setIndex(i);
+                } else if ((anim->duration() || anim->delay()) && anim->iterationCount() && animationName != none) {
+                    keyframeAnim = KeyframeAnimation::create(const_cast<Animation*>(anim), renderer, i, this, targetStyle);
+                    m_keyframeAnimations.set(keyframeAnim->name().impl(), keyframeAnim);
+                }
+                
+                // Add this to the animation order map.
+                if (keyframeAnim)
+                    m_keyframeAnimationOrderMap.append(keyframeAnim->name().impl());
+            }
+        }
+    }
+    
+    // Make a list of animations to be removed.
+    Vector<AtomicStringImpl*> animsToBeRemoved;
+    kfend = m_keyframeAnimations.end();
+    for (AnimationNameMap::const_iterator it = m_keyframeAnimations.begin(); it != kfend; ++it) {
+        KeyframeAnimation* keyframeAnim = it->second.get();
+        if (keyframeAnim->index() < 0)
+            animsToBeRemoved.append(keyframeAnim->name().impl());
+    }
+    
+    // Now remove the animations from the list.
+    for (size_t j = 0; j < animsToBeRemoved.size(); ++j)
+        m_keyframeAnimations.remove(animsToBeRemoved[j]);
+}
+
+PassRefPtr<RenderStyle> CompositeAnimation::animate(RenderObject* renderer, RenderStyle* currentStyle, RenderStyle* targetStyle)
+{
+    RefPtr<RenderStyle> resultStyle;
+
+    // We don't do any transitions if we don't have a currentStyle (on startup).
+    updateTransitions(renderer, currentStyle, targetStyle);
+    updateKeyframeAnimations(renderer, currentStyle, targetStyle);
+    m_keyframeAnimations.checkConsistency();
+
+    if (currentStyle) {
+        // Now that we have transition objects ready, let them know about the new goal state.  We want them
+        // to fill in a RenderStyle*& only if needed.
+        if (!m_transitions.isEmpty()) {
+            CSSPropertyTransitionsMap::const_iterator end = m_transitions.end();
+            for (CSSPropertyTransitionsMap::const_iterator it = m_transitions.begin(); it != end; ++it) {
+                if (ImplicitAnimation* anim = it->second.get())
+                    anim->animate(this, renderer, currentStyle, targetStyle, resultStyle);
+            }
+        }
+    }
+
+    // Now that we have animation objects ready, let them know about the new goal state.  We want them
+    // to fill in a RenderStyle*& only if needed.
+    for (Vector<AtomicStringImpl*>::const_iterator it = m_keyframeAnimationOrderMap.begin(); it != m_keyframeAnimationOrderMap.end(); ++it) {
+        RefPtr<KeyframeAnimation> keyframeAnim = m_keyframeAnimations.get(*it);
+        if (keyframeAnim)
+            keyframeAnim->animate(this, renderer, currentStyle, targetStyle, resultStyle);
+    }
+
+    return resultStyle ? resultStyle.release() : targetStyle;
+}
+
+PassRefPtr<RenderStyle> CompositeAnimation::getAnimatedStyle() const
+{
+    RefPtr<RenderStyle> resultStyle;
+    CSSPropertyTransitionsMap::const_iterator end = m_transitions.end();
+    for (CSSPropertyTransitionsMap::const_iterator it = m_transitions.begin(); it != end; ++it) {
+        if (ImplicitAnimation* implicitAnimation = it->second.get())
+            implicitAnimation->getAnimatedStyle(resultStyle);
+    }
+
+    m_keyframeAnimations.checkConsistency();
+
+    for (Vector<AtomicStringImpl*>::const_iterator it = m_keyframeAnimationOrderMap.begin(); it != m_keyframeAnimationOrderMap.end(); ++it) {
+        RefPtr<KeyframeAnimation> keyframeAnimation = m_keyframeAnimations.get(*it);
+        if (keyframeAnimation)
+            keyframeAnimation->getAnimatedStyle(resultStyle);
+    }
+    
+    return resultStyle;
+}
+
+// "animating" means that something is running that requires the timer to keep firing
+void CompositeAnimation::setAnimating(bool animating)
+{
+    if (!m_transitions.isEmpty()) {
+        CSSPropertyTransitionsMap::const_iterator transitionsEnd = m_transitions.end();
+        for (CSSPropertyTransitionsMap::const_iterator it = m_transitions.begin(); it != transitionsEnd; ++it) {
+            ImplicitAnimation* transition = it->second.get();
+            transition->setAnimating(animating);
+        }
+    }
+    if (!m_keyframeAnimations.isEmpty()) {
+        m_keyframeAnimations.checkConsistency();
+        AnimationNameMap::const_iterator animationsEnd = m_keyframeAnimations.end();
+        for (AnimationNameMap::const_iterator it = m_keyframeAnimations.begin(); it != animationsEnd; ++it) {
+            KeyframeAnimation* anim = it->second.get();
+            anim->setAnimating(animating);
+        }
+    }
+}
+
+double CompositeAnimation::timeToNextService() const
+{
+    // Returns the time at which next service is required. -1 means no service is required. 0 means 
+    // service is required now, and > 0 means service is required that many seconds in the future.
+    double minT = -1;
+    
+    if (!m_transitions.isEmpty()) {
+        CSSPropertyTransitionsMap::const_iterator transitionsEnd = m_transitions.end();
+        for (CSSPropertyTransitionsMap::const_iterator it = m_transitions.begin(); it != transitionsEnd; ++it) {
+            ImplicitAnimation* transition = it->second.get();
+            double t = transition ? transition->timeToNextService() : -1;
+            if (t < minT || minT == -1)
+                minT = t;
+            if (minT == 0)
+                return 0;
+        }
+    }
+    if (!m_keyframeAnimations.isEmpty()) {
+        m_keyframeAnimations.checkConsistency();
+        AnimationNameMap::const_iterator animationsEnd = m_keyframeAnimations.end();
+        for (AnimationNameMap::const_iterator it = m_keyframeAnimations.begin(); it != animationsEnd; ++it) {
+            KeyframeAnimation* animation = it->second.get();
+            double t = animation ? animation->timeToNextService() : -1;
+            if (t < minT || minT == -1)
+                minT = t;
+            if (minT == 0)
+                return 0;
+        }
+    }
+
+    return minT;
+}
+
+PassRefPtr<KeyframeAnimation> CompositeAnimation::getAnimationForProperty(int property) const
+{
+    RefPtr<KeyframeAnimation> retval;
+    
+    // We want to send back the last animation with the property if there are multiples.
+    // So we need to iterate through all animations
+    if (!m_keyframeAnimations.isEmpty()) {
+        m_keyframeAnimations.checkConsistency();
+        AnimationNameMap::const_iterator animationsEnd = m_keyframeAnimations.end();
+        for (AnimationNameMap::const_iterator it = m_keyframeAnimations.begin(); it != animationsEnd; ++it) {
+            RefPtr<KeyframeAnimation> anim = it->second;
+            if (anim->hasAnimationForProperty(property))
+                retval = anim;
+        }
+    }
+    
+    return retval;
+}
+
+void CompositeAnimation::suspendAnimations()
+{
+    if (m_isSuspended)
+        return;
+
+    m_isSuspended = true;
+
+    if (!m_keyframeAnimations.isEmpty()) {
+        m_keyframeAnimations.checkConsistency();
+        AnimationNameMap::const_iterator animationsEnd = m_keyframeAnimations.end();
+        for (AnimationNameMap::const_iterator it = m_keyframeAnimations.begin(); it != animationsEnd; ++it) {
+            if (KeyframeAnimation* anim = it->second.get())
+                anim->updatePlayState(false);
+        }
+    }
+    if (!m_transitions.isEmpty()) {
+        CSSPropertyTransitionsMap::const_iterator transitionsEnd = m_transitions.end();
+        for (CSSPropertyTransitionsMap::const_iterator it = m_transitions.begin(); it != transitionsEnd; ++it) {
+            ImplicitAnimation* anim = it->second.get();
+            if (anim && anim->hasStyle())
+                anim->updatePlayState(false);
+        }
+    }
+}
+
+void CompositeAnimation::resumeAnimations()
+{
+    if (!m_isSuspended)
+        return;
+
+    m_isSuspended = false;
+
+    if (!m_keyframeAnimations.isEmpty()) {
+        m_keyframeAnimations.checkConsistency();
+        AnimationNameMap::const_iterator animationsEnd = m_keyframeAnimations.end();
+        for (AnimationNameMap::const_iterator it = m_keyframeAnimations.begin(); it != animationsEnd; ++it) {
+            KeyframeAnimation* anim = it->second.get();
+            if (anim && anim->playStatePlaying())
+                anim->updatePlayState(true);
+        }
+    }
+
+    if (!m_transitions.isEmpty()) {
+        CSSPropertyTransitionsMap::const_iterator transitionsEnd = m_transitions.end();
+        for (CSSPropertyTransitionsMap::const_iterator it = m_transitions.begin(); it != transitionsEnd; ++it) {
+            ImplicitAnimation* anim = it->second.get();
+            if (anim && anim->hasStyle())
+                anim->updatePlayState(true);
+        }
+    }
+}
+
+void CompositeAnimation::overrideImplicitAnimations(int property)
+{
+    CSSPropertyTransitionsMap::const_iterator end = m_transitions.end();
+    if (!m_transitions.isEmpty()) {
+        for (CSSPropertyTransitionsMap::const_iterator it = m_transitions.begin(); it != end; ++it) {
+            ImplicitAnimation* anim = it->second.get();
+            if (anim && anim->animatingProperty() == property)
+                anim->setOverridden(true);
+        }
+    }
+}
+
+void CompositeAnimation::resumeOverriddenImplicitAnimations(int property)
+{
+    if (!m_transitions.isEmpty()) {
+        CSSPropertyTransitionsMap::const_iterator end = m_transitions.end();
+        for (CSSPropertyTransitionsMap::const_iterator it = m_transitions.begin(); it != end; ++it) {
+            ImplicitAnimation* anim = it->second.get();
+            if (anim && anim->animatingProperty() == property)
+                anim->setOverridden(false);
+        }
+    }
+}
+
+bool CompositeAnimation::isAnimatingProperty(int property, bool acceleratedOnly, bool isRunningNow) const
+{
+    if (!m_keyframeAnimations.isEmpty()) {
+        m_keyframeAnimations.checkConsistency();
+        AnimationNameMap::const_iterator animationsEnd = m_keyframeAnimations.end();
+        for (AnimationNameMap::const_iterator it = m_keyframeAnimations.begin(); it != animationsEnd; ++it) {
+            KeyframeAnimation* anim = it->second.get();
+            if (anim && anim->isAnimatingProperty(property, acceleratedOnly, isRunningNow))
+                return true;
+        }
+    }
+
+    if (!m_transitions.isEmpty()) {
+        CSSPropertyTransitionsMap::const_iterator transitionsEnd = m_transitions.end();
+        for (CSSPropertyTransitionsMap::const_iterator it = m_transitions.begin(); it != transitionsEnd; ++it) {
+            ImplicitAnimation* anim = it->second.get();
+            if (anim && anim->isAnimatingProperty(property, acceleratedOnly, isRunningNow))
+                return true;
+        }
+    }
+    return false;
+}
+
+bool CompositeAnimation::pauseAnimationAtTime(const AtomicString& name, double t)
+{
+    if (!name)
+        return false;
+
+    m_keyframeAnimations.checkConsistency();
+
+    RefPtr<KeyframeAnimation> keyframeAnim = m_keyframeAnimations.get(name.impl());
+    if (!keyframeAnim || !keyframeAnim->running())
+        return false;
+
+    int count = keyframeAnim->m_animation->iterationCount();
+    if ((t >= 0.0) && (!count || (t <= count * keyframeAnim->duration()))) {
+        keyframeAnim->freezeAtTime(t);
+        return true;
+    }
+
+    return false;
+}
+
+bool CompositeAnimation::pauseTransitionAtTime(int property, double t)
+{
+    if ((property < firstCSSProperty) || (property >= firstCSSProperty + numCSSProperties))
+        return false;
+
+    ImplicitAnimation* implAnim = m_transitions.get(property).get();
+    if (!implAnim || !implAnim->running())
+        return false;
+
+    if ((t >= 0.0) && (t <= implAnim->duration())) {
+        implAnim->freezeAtTime(t);
+        return true;
+    }
+
+    return false;
+}
+
+unsigned CompositeAnimation::numberOfActiveAnimations() const
+{
+    unsigned count = 0;
+    
+    if (!m_keyframeAnimations.isEmpty()) {
+        m_keyframeAnimations.checkConsistency();
+        AnimationNameMap::const_iterator animationsEnd = m_keyframeAnimations.end();
+        for (AnimationNameMap::const_iterator it = m_keyframeAnimations.begin(); it != animationsEnd; ++it) {
+            KeyframeAnimation* anim = it->second.get();
+            if (anim->running())
+                ++count;
+        }
+    }
+
+    if (!m_transitions.isEmpty()) {
+        CSSPropertyTransitionsMap::const_iterator transitionsEnd = m_transitions.end();
+        for (CSSPropertyTransitionsMap::const_iterator it = m_transitions.begin(); it != transitionsEnd; ++it) {
+            ImplicitAnimation* anim = it->second.get();
+            if (anim->running())
+                ++count;
+        }
+    }
+    
+    return count;
+}
+
+} // namespace WebCore