Merge "Add a method in IDreamManager to check if dreaming OR in dream preview" into tm-qpr-dev am: 3448c2fe1c

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/19603443

Change-Id: I003dde1065c5d16c44bd63d7693b593d157fe47e
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>

core/java/android/service/dreams/IDreamManager.aidl

@@ -35,6 +35,8 @@ interface IDreamManager {
     void testDream(int userId, in ComponentName componentName);
     @UnsupportedAppUsage
     boolean isDreaming();
+    @UnsupportedAppUsage
+    boolean isDreamingOrInPreview();
     void finishSelf(in IBinder token, boolean immediate);
     void startDozing(in IBinder token, int screenState, int screenBrightness);
     void stopDozing(in IBinder token);

services/core/java/com/android/server/dreams/DreamManagerService.java

@@ -218,6 +218,7 @@ public final class DreamManagerService extends SystemService {
         }, pw, "", 200);
     }
 
+    /** Whether a real dream is occurring. */
     private boolean isDreamingInternal() {
         synchronized (mLock) {
             return mCurrentDreamToken != null && !mCurrentDreamIsPreview
@@ -225,6 +226,13 @@ public final class DreamManagerService extends SystemService {
         }
     }
 
+    /** Whether a real dream, or a dream preview is occurring. */
+    private boolean isDreamingOrInPreviewInternal() {
+        synchronized (mLock) {
+            return mCurrentDreamToken != null && !mCurrentDreamIsWaking;
+        }
+    }
+
     protected void requestStartDreamFromShell() {
         requestDreamInternal();
     }
@@ -694,6 +702,19 @@ public final class DreamManagerService extends SystemService {
             }
         }
 
+        @Override // Binder call
+        public boolean isDreamingOrInPreview() {
+            checkPermission(android.Manifest.permission.READ_DREAM_STATE);
+
+            final long ident = Binder.clearCallingIdentity();
+            try {
+                return isDreamingOrInPreviewInternal();
+            } finally {
+                Binder.restoreCallingIdentity(ident);
+            }
+        }
+
+
         @Override // Binder call
         public void dream() {
             checkPermission(android.Manifest.permission.WRITE_DREAM_STATE);