Remove animation value change from push staging

This CL ensures that animation values are only updated during
animation pulses.

This CL also includes the revert of
https://googleplex-android-review.git.corp.google.com/#/c/1285913/

BUG: 30659748

Change-Id: Iadc84462dc61157efd3c18a23767bba9faf00f6e

libs/hwui/Animator.cpp

@@ -123,22 +123,27 @@ void BaseRenderNodeAnimator::resolveStagingRequest(Request request) {
         mPlayTime = (mPlayState == PlayState::Running || mPlayState == PlayState::Reversing) ?
                         mPlayTime : 0;
         mPlayState = PlayState::Running;
+        mPendingActionUponFinish = Action::None;
         break;
     case Request::Reverse:
         mPlayTime = (mPlayState == PlayState::Running || mPlayState == PlayState::Reversing) ?
                         mPlayTime : mDuration;
         mPlayState = PlayState::Reversing;
+        mPendingActionUponFinish = Action::None;
         break;
     case Request::Reset:
         mPlayTime = 0;
         mPlayState = PlayState::Finished;
+        mPendingActionUponFinish = Action::Reset;
         break;
     case Request::Cancel:
         mPlayState = PlayState::Finished;
+        mPendingActionUponFinish = Action::None;
         break;
     case Request::End:
         mPlayTime = mPlayState == PlayState::Reversing ? 0 : mDuration;
         mPlayState = PlayState::Finished;
+        mPendingActionUponFinish = Action::End;
         break;
     default:
         LOG_ALWAYS_FATAL("Invalid staging request: %d", static_cast<int>(request));
@@ -176,8 +181,6 @@ void BaseRenderNodeAnimator::pushStaging(AnimationContext& context) {
         mStagingRequests.clear();
 
         if (mStagingPlayState == PlayState::Finished) {
-            // Set the staging play time and end the animation
-            updatePlayTime(mPlayTime);
             callOnFinishedListener(context);
         } else if (mStagingPlayState == PlayState::Running
                 || mStagingPlayState == PlayState::Reversing) {
@@ -236,6 +239,15 @@ bool BaseRenderNodeAnimator::animate(AnimationContext& context) {
         return false;
     }
     if (mPlayState == PlayState::Finished) {
+        if (mPendingActionUponFinish == Action::Reset) {
+            // Skip to start.
+            updatePlayTime(0);
+        } else if (mPendingActionUponFinish == Action::End) {
+            // Skip to end.
+            updatePlayTime(mDuration);
+        }
+        // Reset pending action.
+        mPendingActionUponFinish = Action ::None;
         return true;
     }
 

libs/hwui/Animator.h

@@ -159,6 +159,17 @@ private:
         Cancel,
         End
     };
+
+    // Defines different actions upon finish.
+    enum class Action {
+        // For animations that got canceled or finished normally. no more action needs to be done.
+        None,
+        // For animations that get reset, the reset will happen in the next animation pulse.
+        Reset,
+        // For animations being ended, in the next animation pulse the animation will skip to end.
+        End
+    };
+
     inline void checkMutable();
     virtual void transitionToRunning(AnimationContext& context);
     void doSetStartValue(float value);
@@ -166,7 +177,7 @@ private:
     void resolveStagingRequest(Request request);
 
     std::vector<Request> mStagingRequests;
-
+    Action mPendingActionUponFinish = Action::None;
 };
 
 class RenderPropertyAnimator : public BaseRenderNodeAnimator {

libs/hwui/AnimatorManager.cpp

@@ -83,11 +83,8 @@ void AnimatorManager::pushStaging() {
         }
         mNewAnimators.clear();
     }
-    if (mAnimators.size()) {
-        for (auto& animator : mAnimators) {
-            animator->pushStaging(mAnimationHandle->context());
-        }
-        mParent.mProperties.updateMatrix();
+    for (auto& animator : mAnimators) {
+        animator->pushStaging(mAnimationHandle->context());
     }
 }