Notify the host when the insets animation running state is changed

This helps the UI toolkit control the frame rate while there is any
insets animation running.

Bug: 300019131
Test: Add local logs to see if notifyInsetsAnimationRunningStateChanged
      is called as expected while playing insets animations.
Change-Id: I01bbacf8379ed165791b797a3e247dd7ac6e5901

4 files changed, 37 insertions, 0 deletions

diff --git a/core/java/android/view/InsetsController.java b/core/java/android/view/InsetsController.java
index 90663c7ad38e..147c15bea076 100644
--- a/core/java/android/view/InsetsController.java
+++ b/core/java/android/view/InsetsController.java
@@ -216,6 +216,14 @@ public class InsetsController implements WindowInsetsController, InsetsAnimation
         default CompatibilityInfo.Translator getTranslator() {
             return null;
         }
+
+        /**
+         * Notifies when the state of running animation is changed. The state is either "running" or
+         * "idle".
+         *
+         * @param running {@code true} if there is any animation running; {@code false} otherwise.
+         */
+        default void notifyAnimationRunningStateChanged(boolean running) {}
     }
 
     private static final String TAG = "InsetsController";
@@ -749,6 +757,9 @@ public class InsetsController implements WindowInsetsController, InsetsAnimation
                     final InsetsAnimationControlRunner runner = new InsetsResizeAnimationRunner(
                             mFrame, state1, mToState, RESIZE_INTERPOLATOR,
                             ANIMATION_DURATION_RESIZE, mTypes, InsetsController.this);
+                    if (mRunningAnimations.isEmpty()) {
+                        mHost.notifyAnimationRunningStateChanged(true);
+                    }
                     mRunningAnimations.add(new RunningAnimation(runner, runner.getAnimationType()));
                 }
             };
@@ -1382,6 +1393,9 @@ public class InsetsController implements WindowInsetsController, InsetsAnimation
             }
         }
         ImeTracker.forLogging().onProgress(statsToken, ImeTracker.PHASE_CLIENT_ANIMATION_RUNNING);
+        if (mRunningAnimations.isEmpty()) {
+            mHost.notifyAnimationRunningStateChanged(true);
+        }
         mRunningAnimations.add(new RunningAnimation(runner, animationType));
         if (DEBUG) Log.d(TAG, "Animation added to runner. useInsetsAnimationThread: "
                 + useInsetsAnimationThread);
@@ -1588,6 +1602,9 @@ public class InsetsController implements WindowInsetsController, InsetsAnimation
                 break;
             }
         }
+        if (mRunningAnimations.isEmpty()) {
+            mHost.notifyAnimationRunningStateChanged(false);
+        }
         onAnimationStateChanged(removedTypes, false /* running */);
     }
 
diff --git a/core/java/android/view/ViewRootImpl.java b/core/java/android/view/ViewRootImpl.java
index 7a6c2929c706..b1076277ee2d 100644
--- a/core/java/android/view/ViewRootImpl.java
+++ b/core/java/android/view/ViewRootImpl.java
@@ -816,6 +816,8 @@ public final class ViewRootImpl implements ViewParent,
     private long mFpsPrevTime = -1;
     private int mFpsNumFrames;
 
+    private boolean mInsetsAnimationRunning;
+
     /**
      * The resolved pointer icon type requested by this window.
      * A null value indicates the resolved pointer icon has not yet been calculated.
@@ -2179,6 +2181,10 @@ public final class ViewRootImpl implements ViewParent,
         }
     }
 
+    void notifyInsetsAnimationRunningStateChanged(boolean running) {
+        mInsetsAnimationRunning = running;
+    }
+
     @Override
     public void requestLayout() {
         if (!mHandlingLayoutInLayoutRequest) {
diff --git a/core/java/android/view/ViewRootInsetsControllerHost.java b/core/java/android/view/ViewRootInsetsControllerHost.java
index a2708eead171..40730e8de849 100644
--- a/core/java/android/view/ViewRootInsetsControllerHost.java
+++ b/core/java/android/view/ViewRootInsetsControllerHost.java
@@ -279,6 +279,13 @@ public class ViewRootInsetsControllerHost implements InsetsController.Host {
         return null;
     }
 
+    @Override
+    public void notifyAnimationRunningStateChanged(boolean running) {
+        if (mViewRoot != null) {
+            mViewRoot.notifyInsetsAnimationRunningStateChanged(running);
+        }
+    }
+
     private boolean isVisibleToUser() {
         return mViewRoot.getHostVisibility() == View.VISIBLE;
     }
diff --git a/services/core/java/com/android/server/wm/InsetsPolicy.java b/services/core/java/com/android/server/wm/InsetsPolicy.java
index e6bbd52807bd..c089d107d07d 100644
--- a/services/core/java/com/android/server/wm/InsetsPolicy.java
+++ b/services/core/java/com/android/server/wm/InsetsPolicy.java
@@ -740,6 +740,8 @@ class InsetsPolicy {
         private final Handler mHandler;
         private final String mName;
 
+        private boolean mInsetsAnimationRunning;
+
         Host(Handler handler, String name) {
             mHandler = handler;
             mName = name;
@@ -841,5 +843,10 @@ class InsetsPolicy {
         public IBinder getWindowToken() {
             return null;
         }
+
+        @Override
+        public void notifyAnimationRunningStateChanged(boolean running) {
+            mInsetsAnimationRunning = running;
+        }
     }
 }