Ref count layer animation controllers.

cc/layer_animation_controller.cc

 // Copyright 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "cc/layer_animation_controller.h"
 
 #include "cc/active_animation.h"
+#include "cc/animation_registrar.h"
 #include "cc/keyframed_animation_curve.h"
 #include "ui/gfx/transform.h"
 
 namespace cc {
 
-LayerAnimationController::LayerAnimationController(LayerAnimationControllerClient* client)
+LayerAnimationController::LayerAnimationController(int id)
     : m_forceSync(false)
-    , m_client(client)
+    , m_id(id)
+    , m_registrar(0)
+    , m_isActive(false)
 {
 }
 
 LayerAnimationController::~LayerAnimationController()
 {
+    if (m_registrar)
+        m_registrar->UnregisterAnimationController(this);
 }
 
-scoped_ptr<LayerAnimationController> LayerAnimationController::create(LayerAnimationControllerClient* client)
+scoped_refptr<LayerAnimationController> LayerAnimationController::create(int id)
 {
-    return make_scoped_ptr(new LayerAnimationController(client));
+    return make_scoped_refptr(new LayerAnimationController(id));
 }
 
 void LayerAnimationController::pauseAnimation(int animationId, double timeOffset)
 {
     for (size_t i = 0; i < m_activeAnimations.size(); ++i) {
         if (m_activeAnimations[i]->id() == animationId)
             m_activeAnimations[i]->setRunState(ActiveAnimation::Paused, timeOffset + m_activeAnimations[i]->startTime());
     }
 }
 
 void LayerAnimationController::removeAnimation(int animationId)
 {
     for (size_t i = 0; i < m_activeAnimations.size();) {
         if (m_activeAnimations[i]->id() == animationId)
             m_activeAnimations.remove(i);
         else
             i++;
     }
+    updateActivation();
 }
 
 void LayerAnimationController::removeAnimation(int animationId, ActiveAnimation::TargetProperty targetProperty)
 {
     for (size_t i = 0; i < m_activeAnimations.size();) {
         if (m_activeAnimations[i]->id() == animationId && m_activeAnimations[i]->targetProperty() == targetProperty)
             m_activeAnimations.remove(i);
         else
             i++;
     }
+    updateActivation();
 }
 
 // According to render layer backing, these are for testing only.
 void LayerAnimationController::suspendAnimations(double monotonicTime)
 {
     for (size_t i = 0; i < m_activeAnimations.size(); ++i) {
         if (!m_activeAnimations[i]->isFinished())
             m_activeAnimations[i]->setRunState(ActiveAnimation::Paused, monotonicTime);
     }
 }
@@ skipping 18 matching lines @@
         purgeAnimationsMarkedForDeletion();
         pushNewAnimationsToImplThread(controllerImpl);
 
         // Remove finished impl side animations only after pushing,
         // and only after the animations are deleted on the main thread
         // this insures we will never push an animation twice.
         removeAnimationsCompletedOnMainThread(controllerImpl);
 
         pushPropertiesToImplThread(controllerImpl);
     }
+    controllerImpl->updateActivation();
+    updateActivation();
 }
 
 void LayerAnimationController::animate(double monotonicTime, AnimationEventsVector* events)
 {
     startAnimationsWaitingForNextTick(monotonicTime, events);
     startAnimationsWaitingForStartTime(monotonicTime, events);
     startAnimationsWaitingForTargetAvailability(monotonicTime, events);
     resolveConflicts(monotonicTime);
     tickAnimations(monotonicTime);
     markAnimationsForDeletion(monotonicTime, events);
     startAnimationsWaitingForTargetAvailability(monotonicTime, events);
+
+    updateActivation();
 }
 
 void LayerAnimationController::addAnimation(scoped_ptr<ActiveAnimation> animation)
 {
     m_activeAnimations.append(animation.Pass());
+    // Activate each time an animation is added.

[enne (OOO), 2012/12/17 20:21:22]

I'm not sure I follow the force parameter here.  Why does this case need to be
forced but remove does not?

+    bool force = true;
+    updateActivation(force);
 }
 
 ActiveAnimation* LayerAnimationController::getActiveAnimation(int groupId, ActiveAnimation::TargetProperty targetProperty) const
 {
     for (size_t i = 0; i < m_activeAnimations.size(); ++i)
         if (m_activeAnimations[i]->group() == groupId && m_activeAnimations[i]->targetProperty() == targetProperty)
             return m_activeAnimations[i];
     return 0;
 }
 
@@ skipping 29 matching lines @@
 {
     for (size_t i = 0; i < m_activeAnimations.size(); ++i) {
         if (m_activeAnimations[i]->group() == event.groupId && m_activeAnimations[i]->targetProperty() == event.targetProperty && m_activeAnimations[i]->needsSynchronizedStartTime()) {
             m_activeAnimations[i]->setNeedsSynchronizedStartTime(false);
             m_activeAnimations[i]->setStartTime(event.monotonicTime);
             return;
         }
     }
 }
 
-void LayerAnimationController::setClient(LayerAnimationControllerClient* client)
+void LayerAnimationController::setAnimationRegistrar(AnimationRegistrar* registrar)
 {
-    m_client = client;
+    if (m_registrar == registrar)
+        return;
+
+    if (m_registrar)
+        m_registrar->UnregisterAnimationController(this);
+
+    m_registrar = registrar;
+    if (m_registrar)
+        m_registrar->RegisterAnimationController(this);
+
+    bool force = true;
+    updateActivation(force);
+}
+
+void LayerAnimationController::addObserver(LayerAnimationControllerObserver* observer)
+{
+    if (!m_observers.HasObserver(observer))
+        m_observers.AddObserver(observer);
+}
+
+void LayerAnimationController::removeObserver(LayerAnimationControllerObserver* observer)
+{
+    m_observers.RemoveObserver(observer);
 }
 
 void LayerAnimationController::pushNewAnimationsToImplThread(LayerAnimationController* controllerImpl) const
 {
     // Any new animations owned by the main thread's controller are cloned and adde to the impl thread's controller.
     for (size_t i = 0; i < m_activeAnimations.size(); ++i) {
         // If the animation is already running on the impl thread, there is no need to copy it over.
         if (controllerImpl->getActiveAnimation(m_activeAnimations[i]->group(), m_activeAnimations[i]->targetProperty()))
             continue;
 
@@ skipping 37 matching lines @@
 }
 
 void LayerAnimationController::startAnimationsWaitingForNextTick(double monotonicTime, AnimationEventsVector* events)
 {
     for (size_t i = 0; i < m_activeAnimations.size(); ++i) {
         if (m_activeAnimations[i]->runState() == ActiveAnimation::WaitingForNextTick) {
             m_activeAnimations[i]->setRunState(ActiveAnimation::Running, monotonicTime);
             if (!m_activeAnimations[i]->hasSetStartTime())
                 m_activeAnimations[i]->setStartTime(monotonicTime);
             if (events)
-                events->push_back(AnimationEvent(AnimationEvent::Started, m_client->id(), m_activeAnimations[i]->group(), m_activeAnimations[i]->targetProperty(), monotonicTime));
+                events->push_back(AnimationEvent(AnimationEvent::Started, m_id, m_activeAnimations[i]->group(), m_activeAnimations[i]->targetProperty(), monotonicTime));
         }
     }
 }
 
 void LayerAnimationController::startAnimationsWaitingForStartTime(double monotonicTime, AnimationEventsVector* events)
 {
     for (size_t i = 0; i < m_activeAnimations.size(); ++i) {
         if (m_activeAnimations[i]->runState() == ActiveAnimation::WaitingForStartTime && m_activeAnimations[i]->startTime() <= monotonicTime) {
             m_activeAnimations[i]->setRunState(ActiveAnimation::Running, monotonicTime);
             if (events)
-                events->push_back(AnimationEvent(AnimationEvent::Started, m_client->id(), m_activeAnimations[i]->group(), m_activeAnimations[i]->targetProperty(), monotonicTime));
+                events->push_back(AnimationEvent(AnimationEvent::Started, m_id, m_activeAnimations[i]->group(), m_activeAnimations[i]->targetProperty(), monotonicTime));
         }
     }
 }
 
 void LayerAnimationController::startAnimationsWaitingForTargetAvailability(double monotonicTime, AnimationEventsVector* events)
 {
     // First collect running properties.
     TargetProperties blockedProperties;
     for (size_t i = 0; i < m_activeAnimations.size(); ++i) {
         if (m_activeAnimations[i]->runState() == ActiveAnimation::Running || m_activeAnimations[i]->runState() == ActiveAnimation::Finished)
@@ skipping 18 matching lines @@
                 if (!blockedProperties.insert(*pIter).second)
                     nullIntersection = false;
             }
 
             // If the intersection is null, then we are free to start the animations in the group.
             if (nullIntersection) {
                 m_activeAnimations[i]->setRunState(ActiveAnimation::Running, monotonicTime);
                 if (!m_activeAnimations[i]->hasSetStartTime())
                     m_activeAnimations[i]->setStartTime(monotonicTime);
                 if (events)
-                    events->push_back(AnimationEvent(AnimationEvent::Started, m_client->id(), m_activeAnimations[i]->group(), m_activeAnimations[i]->targetProperty(), monotonicTime));
+                    events->push_back(AnimationEvent(AnimationEvent::Started, m_id, m_activeAnimations[i]->group(), m_activeAnimations[i]->targetProperty(), monotonicTime));
                 for (size_t j = i + 1; j < m_activeAnimations.size(); ++j) {
                     if (m_activeAnimations[i]->group() == m_activeAnimations[j]->group()) {
                         m_activeAnimations[j]->setRunState(ActiveAnimation::Running, monotonicTime);
                         if (!m_activeAnimations[j]->hasSetStartTime())
                             m_activeAnimations[j]->setStartTime(monotonicTime);
                     }
                 }
             }
         }
     }
@@ skipping 35 matching lines @@
                     break;
                 }
             }
         }
         if (allAnimsWithSameIdAreFinished) {
             // We now need to remove all animations with the same group id as groupId
             // (and send along animation finished notifications, if necessary).
             for (size_t j = i; j < m_activeAnimations.size(); j++) {
                 if (groupId == m_activeAnimations[j]->group()) {
                     if (events)
-                        events->push_back(AnimationEvent(AnimationEvent::Finished, m_client->id(), m_activeAnimations[j]->group(), m_activeAnimations[j]->targetProperty(), monotonicTime));
+                        events->push_back(AnimationEvent(AnimationEvent::Finished, m_id, m_activeAnimations[j]->group(), m_activeAnimations[j]->targetProperty(), monotonicTime));
                     m_activeAnimations[j]->setRunState(ActiveAnimation::WaitingForDeletion, monotonicTime);
                 }
             }
         }
     }
 }
 
 void LayerAnimationController::purgeAnimationsMarkedForDeletion()
 {
     for (size_t i = 0; i < m_activeAnimations.size();) {
@@ skipping 30 matching lines @@
 
             // Animation assumes its initial value until it gets the synchronized start time
             // from the impl thread and can start ticking.
             if (m_activeAnimations[i]->needsSynchronizedStartTime())
                 trimmed = 0;
 
             switch (m_activeAnimations[i]->targetProperty()) {
 
             case ActiveAnimation::Transform: {
                 const TransformAnimationCurve* transformAnimationCurve = m_activeAnimations[i]->curve()->toTransformAnimationCurve();
-                const gfx::Transform matrix = transformAnimationCurve->getValue(trimmed).toTransform();
+                const gfx::Transform transform = transformAnimationCurve->getValue(trimmed).toTransform();
                 if (m_activeAnimations[i]->isFinishedAt(monotonicTime))
                     m_activeAnimations[i]->setRunState(ActiveAnimation::Finished, monotonicTime);
 
-                m_client->setTransformFromAnimation(matrix);
+                notifyObserversTransformAnimated(transform);
                 break;
             }
 
             case ActiveAnimation::Opacity: {
                 const FloatAnimationCurve* floatAnimationCurve = m_activeAnimations[i]->curve()->toFloatAnimationCurve();
                 const float opacity = floatAnimationCurve->getValue(trimmed);
                 if (m_activeAnimations[i]->isFinishedAt(monotonicTime))
                     m_activeAnimations[i]->setRunState(ActiveAnimation::Finished, monotonicTime);
 
-                m_client->setOpacityFromAnimation(opacity);
+                notifyObserversOpacityAnimated(opacity);
                 break;
             }
 
             // Do nothing for sentinel value.
             case ActiveAnimation::TargetPropertyEnumSize:
                 NOTREACHED();
             }
         }
     }
 }
 
+void LayerAnimationController::updateActivation(bool force)
+{
+    if (m_registrar) {
+        if (!m_activeAnimations.isEmpty() && (!m_isActive || force))
+            m_registrar->DidActivateAnimationController(this);
+        else if (m_activeAnimations.isEmpty() && (m_isActive || force))
+            m_registrar->DidDeactivateAnimationController(this);
+        m_isActive = !m_activeAnimations.isEmpty();
+    }
+}
+
+void LayerAnimationController::notifyObserversOpacityAnimated(float opacity)
+{
+    FOR_EACH_OBSERVER(LayerAnimationControllerObserver,
+                      m_observers,
+                      OnOpacityAnimated(opacity));
+}
+
+void LayerAnimationController::notifyObserversTransformAnimated(const gfx::Transform& transform)
+{
+    FOR_EACH_OBSERVER(LayerAnimationControllerObserver,
+                      m_observers,
+                      OnTransformAnimated(transform));
+}
+
 }  // namespace cc