Implement nice transitions for light status bar

- When the flag changes, apply an animation from the current value
- When the flag change is caused by an app transition, synchronize
  the status bar animation with the app transition animation.
  PhoneWindowManager calculates the timings based on some heuristics
  of the app transition animations and supplies these timings to
  StatusBarService.

Bug: 19233606
Change-Id: I4f99afba8f1eebb3524699ed4d7fbafee5463a37

2 files changed, 59 insertions, 17 deletions

diff --git a/core/java/com/android/internal/statusbar/IStatusBar.aidl b/core/java/com/android/internal/statusbar/IStatusBar.aidl
index a3c0db4..2b0d244 100644
--- a/core/java/com/android/internal/statusbar/IStatusBar.aidl
+++ b/core/java/com/android/internal/statusbar/IStatusBar.aidl
@@ -1,19 +1,19 @@
 /**
  * Copyright (c) 2007, The Android Open Source Project
  *
- * Licensed under the Apache License, Version 2.0 (the "License"); 
- * you may not use this file except in compliance with the License. 
- * You may obtain a copy of the License at 
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
  *
- *     http://www.apache.org/licenses/LICENSE-2.0 
+ *     http://www.apache.org/licenses/LICENSE-2.0
  *
- * Unless required by applicable law or agreed to in writing, software 
- * distributed under the License is distributed on an "AS IS" BASIS, 
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 
- * See the License for the specific language governing permissions and 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
  * limitations under the License.
  */
- 
+
 package com.android.internal.statusbar;
 
 import com.android.internal.statusbar.StatusBarIcon;
@@ -43,5 +43,26 @@ oneway interface IStatusBar
     void preloadRecentApps();
     void cancelPreloadRecentApps();
     void showScreenPinningRequest();
+
+    /**
+     * Notifies the status bar that an app transition is pending to delay applying some flags with
+     * visual impact until {@link #appTransitionReady} is called.
+     */
+    void appTransitionPending();
+
+    /**
+     * Notifies the status bar that a pending app transition has been cancelled.
+     */
+    void appTransitionCancelled();
+
+    /**
+     * Notifies the status bar that an app transition is now being executed.
+     *
+     * @param statusBarAnimationsStartTime the desired start time for all visual animations in the
+     *        status bar caused by this app transition in uptime millis
+     * @param statusBarAnimationsDuration the duration for all visual animations in the status
+     *        bar caused by this app transition in millis
+     */
+    void appTransitionStarting(long statusBarAnimationsStartTime, long statusBarAnimationsDuration);
 }
 
diff --git a/core/java/com/android/internal/statusbar/IStatusBarService.aidl b/core/java/com/android/internal/statusbar/IStatusBarService.aidl
index 40c009f..6cb839e 100644
--- a/core/java/com/android/internal/statusbar/IStatusBarService.aidl
+++ b/core/java/com/android/internal/statusbar/IStatusBarService.aidl
@@ -1,16 +1,16 @@
 /**
  * Copyright (c) 2007, The Android Open Source Project
  *
- * Licensed under the Apache License, Version 2.0 (the "License"); 
- * you may not use this file except in compliance with the License. 
- * You may obtain a copy of the License at 
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
  *
- *     http://www.apache.org/licenses/LICENSE-2.0 
+ *     http://www.apache.org/licenses/LICENSE-2.0
  *
- * Unless required by applicable law or agreed to in writing, software 
- * distributed under the License is distributed on an "AS IS" BASIS, 
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 
- * See the License for the specific language governing permissions and 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
  * limitations under the License.
  */
 
@@ -61,4 +61,25 @@ interface IStatusBarService
     void toggleRecentApps();
     void preloadRecentApps();
     void cancelPreloadRecentApps();
+
+    /**
+     * Notifies the status bar that an app transition is pending to delay applying some flags with
+     * visual impact until {@link #appTransitionReady} is called.
+     */
+    void appTransitionPending();
+
+    /**
+     * Notifies the status bar that a pending app transition has been cancelled.
+     */
+    void appTransitionCancelled();
+
+    /**
+     * Notifies the status bar that an app transition is now being executed.
+     *
+     * @param statusBarAnimationsStartTime the desired start time for all visual animations in the
+     *        status bar caused by this app transition in uptime millis
+     * @param statusBarAnimationsDuration the duration for all visual animations in the status
+     *        bar caused by this app transition in millis
+     */
+    void appTransitionStarting(long statusBarAnimationsStartTime, long statusBarAnimationsDuration);
 }