Merge "Add a quick path to start transient recents" into tm-qpr-dev

services/core/java/com/android/server/wm/ActivityStartController.java

@@ -19,7 +19,9 @@ package com.android.server.wm;
 import static android.app.ActivityManager.START_CANCELED;
 import static android.app.ActivityManager.START_SUCCESS;
 import static android.app.WindowConfiguration.ACTIVITY_TYPE_HOME;
+import static android.app.WindowConfiguration.ACTIVITY_TYPE_RECENTS;
 import static android.app.WindowConfiguration.WINDOWING_MODE_FULLSCREEN;
+import static android.app.WindowConfiguration.WINDOWING_MODE_UNDEFINED;
 import static android.content.Intent.FLAG_ACTIVITY_NEW_TASK;
 import static android.os.FactoryTest.FACTORY_TEST_LOW_LEVEL;
 
@@ -29,6 +31,7 @@ import static com.android.server.wm.ActivityTaskSupervisor.ON_TOP;
 
 import android.annotation.NonNull;
 import android.annotation.Nullable;
+import android.app.ActivityManager;
 import android.app.ActivityOptions;
 import android.app.IApplicationThread;
 import android.content.ComponentName;
@@ -46,6 +49,7 @@ import android.provider.Settings;
 import android.util.Slog;
 import android.util.SparseArray;
 import android.view.RemoteAnimationAdapter;
+import android.view.WindowManager;
 
 import com.android.internal.annotations.VisibleForTesting;
 import com.android.internal.util.ArrayUtils;
@@ -536,6 +540,42 @@ public class ActivityStartController {
                 .execute();
     }
 
+    boolean startExistingRecentsIfPossible(Intent intent, ActivityOptions options) {
+        final int activityType = mService.getRecentTasks().getRecentsComponent()
+                .equals(intent.getComponent()) ? ACTIVITY_TYPE_RECENTS : ACTIVITY_TYPE_HOME;
+        final Task rootTask = mService.mRootWindowContainer.getDefaultTaskDisplayArea()
+                .getRootTask(WINDOWING_MODE_UNDEFINED, activityType);
+        if (rootTask == null) return false;
+        final ActivityRecord r = rootTask.topRunningActivity();
+        if (r == null || r.mVisibleRequested || !r.attachedToProcess()
+                || !r.mActivityComponent.equals(intent.getComponent())
+                // Recents keeps invisible while device is locked.
+                || r.mDisplayContent.isKeyguardLocked()) {
+            return false;
+        }
+        mService.mRootWindowContainer.startPowerModeLaunchIfNeeded(true /* forceSend */, r);
+        final ActivityMetricsLogger.LaunchingState launchingState =
+                mSupervisor.getActivityMetricsLogger().notifyActivityLaunching(intent);
+        final Task task = r.getTask();
+        mService.deferWindowLayout();
+        try {
+            task.mTransitionController.requestTransitionIfNeeded(WindowManager.TRANSIT_TO_FRONT,
+                    0 /* flags */, task, task /* readyGroupRef */,
+                    options.getRemoteTransition(), null /* displayChange */);
+            r.mTransitionController.setTransientLaunch(r,
+                    TaskDisplayArea.getRootTaskAbove(rootTask));
+            task.moveToFront("startExistingRecents");
+            task.mInResumeTopActivity = true;
+            task.resumeTopActivity(null /* prev */, options, true /* deferPause */);
+            mSupervisor.getActivityMetricsLogger().notifyActivityLaunched(launchingState,
+                    ActivityManager.START_TASK_TO_FRONT, false, r, options);
+        } finally {
+            task.mInResumeTopActivity = false;
+            mService.continueWindowLayout();
+        }
+        return true;
+    }
+
     void registerRemoteAnimationForNextActivityStart(String packageName,
             RemoteAnimationAdapter adapter, @Nullable IBinder launchCookie) {
         mPendingRemoteAnimationRegistry.addPendingAnimation(packageName, adapter, launchCookie);

services/core/java/com/android/server/wm/ActivityTaskManagerService.java

@@ -1231,6 +1231,28 @@ public class ActivityTaskManagerService extends IActivityTaskManager.Stub {
             @Nullable String callingFeatureId, Intent intent, String resolvedType,
             IBinder resultTo, String resultWho, int requestCode, int startFlags,
             ProfilerInfo profilerInfo, Bundle bOptions, int userId, boolean validateIncomingUser) {
+
+        final SafeActivityOptions opts = SafeActivityOptions.fromBundle(bOptions);
+        // A quick path (skip general intent/task resolving) to start recents animation if the
+        // recents (or home) activity is available in background.
+        if (opts != null && opts.getOriginalOptions().getTransientLaunch()
+                && isCallerRecents(Binder.getCallingUid())) {
+            final long origId = Binder.clearCallingIdentity();
+            try {
+                synchronized (mGlobalLock) {
+                    Trace.traceBegin(TRACE_TAG_WINDOW_MANAGER, "startExistingRecents");
+                    if (mActivityStartController.startExistingRecentsIfPossible(
+                            intent, opts.getOriginalOptions())) {
+                        return ActivityManager.START_TASK_TO_FRONT;
+                    }
+                    // Else follow the standard launch procedure.
+                }
+            } finally {
+                Trace.traceEnd(TRACE_TAG_WINDOW_MANAGER);
+                Binder.restoreCallingIdentity(origId);
+            }
+        }
+
         assertPackageMatchesCallingUid(callingPackage);
         enforceNotIsolatedCaller("startActivityAsUser");
         if (Process.isSdkSandboxUid(Binder.getCallingUid())) {
@@ -1257,7 +1279,7 @@ public class ActivityTaskManagerService extends IActivityTaskManager.Stub {
                 .setRequestCode(requestCode)
                 .setStartFlags(startFlags)
                 .setProfilerInfo(profilerInfo)
-                .setActivityOptions(bOptions)
+                .setActivityOptions(opts)
                 .setUserId(userId)
                 .execute();
 

services/core/java/com/android/server/wm/AsyncRotationController.java

@@ -120,7 +120,7 @@ class AsyncRotationController extends FadeAnimationController implements Consume
             } else {
                 mTransitionOp = OP_CHANGE;
             }
-        } else if (transitionType != WindowManager.TRANSIT_NONE) {
+        } else if (displayContent.mTransitionController.isShellTransitionsEnabled()) {
             mTransitionOp = OP_APP_SWITCH;
         } else {
             mTransitionOp = OP_LEGACY;

services/core/java/com/android/server/wm/DisplayContent.java

@@ -1687,7 +1687,7 @@ class DisplayContent extends RootDisplayArea implements WindowManagerPolicy.Disp
                     return false;
                 }
             }
-            if (r.isState(RESUMED) && !r.getRootTask().mInResumeTopActivity) {
+            if (r.isState(RESUMED) && !r.getTask().mInResumeTopActivity) {
                 // If the activity is executing or has done the lifecycle callback, use normal
                 // rotation animation so the display info can be updated immediately (see
                 // updateDisplayAndOrientation). This prevents a compatibility issue such as

services/core/java/com/android/server/wm/SafeActivityOptions.java

@@ -18,6 +18,7 @@ package com.android.server.wm;
 
 import static android.Manifest.permission.CONTROL_KEYGUARD;
 import static android.Manifest.permission.CONTROL_REMOTE_APP_TRANSITION_ANIMATIONS;
+import static android.Manifest.permission.MANAGE_ACTIVITY_TASKS;
 import static android.Manifest.permission.START_TASKS_FROM_RECENTS;
 import static android.Manifest.permission.STATUS_BAR_SERVICE;
 import static android.app.ActivityTaskManager.INVALID_TASK_ID;
@@ -247,6 +248,14 @@ public class SafeActivityOptions {
                 throw new SecurityException(msg);
             }
         }
+        if (options.getTransientLaunch() && !supervisor.mRecentTasks.isCallerRecents(callingUid)
+                && ActivityTaskManagerService.checkPermission(
+                        MANAGE_ACTIVITY_TASKS, callingPid, callingUid) == PERMISSION_DENIED) {
+            final String msg = "Permission Denial: starting transient launch from " + callerApp
+                    + ", pid=" + callingPid + ", uid=" + callingUid;
+            Slog.w(TAG, msg);
+            throw new SecurityException(msg);
+        }
         // Check if the caller is allowed to launch on the specified display area.
         final WindowContainerToken daToken = options.getLaunchTaskDisplayArea();
         final TaskDisplayArea taskDisplayArea = daToken != null