Merge "Fix a bug that effectively disallows hiding surfaces."

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

@@ -31,13 +31,12 @@ import android.util.Slog;
 import android.view.Display;
 import android.view.IWindow;
 import android.view.SurfaceControl;
-import android.view.SurfaceControl.Transaction;
 import android.view.SurfaceSession;
 import android.view.View;
 
 import com.android.internal.util.Preconditions;
-import android.view.InputWindowHandle;
 import com.android.server.wm.WindowManagerInternal.IDragDropCallback;
+
 import java.util.concurrent.atomic.AtomicReference;
 
 /**
@@ -71,7 +70,7 @@ class DragDropController {
             new IDragDropCallback() {});
 
     boolean dragDropActiveLocked() {
-        return mDragState != null;
+        return mDragState != null && !mDragState.isClosing();
     }
 
     void showInputSurface(SurfaceControl.Transaction t, int displayId) {

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

@@ -31,25 +31,24 @@ import android.animation.ValueAnimator;
 import android.annotation.Nullable;
 import android.content.ClipData;
 import android.content.ClipDescription;
-import android.content.Context;
-import android.graphics.Rect;
 import android.graphics.Point;
+import android.graphics.Rect;
 import android.hardware.input.InputManager;
-import android.os.Build;
 import android.os.Binder;
+import android.os.Build;
 import android.os.IBinder;
 import android.os.Process;
 import android.os.RemoteException;
-import android.os.ServiceManager;
 import android.os.UserHandle;
 import android.os.UserManager;
-import android.os.IUserManager;
 import android.os.UserManagerInternal;
 import android.util.Slog;
 import android.view.Display;
 import android.view.DragEvent;
+import android.view.InputApplicationHandle;
 import android.view.InputChannel;
 import android.view.InputDevice;
+import android.view.InputWindowHandle;
 import android.view.PointerIcon;
 import android.view.SurfaceControl;
 import android.view.View;
@@ -59,8 +58,6 @@ import android.view.animation.Interpolator;
 
 import com.android.internal.view.IDragAndDropPermissions;
 import com.android.server.LocalServices;
-import android.view.InputApplicationHandle;
-import android.view.InputWindowHandle;
 
 import java.util.ArrayList;
 
@@ -125,6 +122,12 @@ class DragState {
 
     private final Rect mTmpClipRect = new Rect();
 
+    /**
+     * Whether we are finishing this drag and drop. This starts with {@code false}, and is set to
+     * {@code true} when {@link #closeLocked()} is called.
+     */
+    private boolean mIsClosing;
+
     DragState(WindowManagerService service, DragDropController controller, IBinder token,
             SurfaceControl surface, int flags, IBinder localWin) {
         mService = service;
@@ -137,6 +140,10 @@ class DragState {
 
     }
 
+    boolean isClosing() {
+        return mIsClosing;
+    }
+
     void hideInputSurface(SurfaceControl.Transaction t, int displayId) {
         if (displayId != mDisplayContent.getDisplayId()) {
             return;
@@ -177,6 +184,7 @@ class DragState {
      * DragDropController#mDragState becomes null.
      */
     void closeLocked() {
+        mIsClosing = true;
         // Unregister the input interceptor.
         if (mInputInterceptor != null) {
             if (DEBUG_DRAG)

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

@@ -28,12 +28,12 @@ import android.os.Looper;
 import android.os.RemoteException;
 import android.util.Slog;
 import android.view.Display;
-import android.view.SurfaceControl;
 import android.view.IWindow;
+import android.view.InputWindowHandle;
+import android.view.SurfaceControl;
 
 import com.android.internal.annotations.GuardedBy;
 import com.android.server.input.InputManagerService;
-import android.view.InputWindowHandle;
 
 /**
  * Controller for task positioning by drag.
@@ -184,9 +184,7 @@ class TaskPositioningController {
         if (!mInputManager.transferTouchFocus(
                 transferFocusFromWin.mInputChannel, mTaskPositioner.mServerChannel)) {
             Slog.e(TAG_WM, "startPositioningLocked: Unable to transfer touch focus");
-            mTaskPositioner.unregister();
-            mTaskPositioner = null;
-            displayContent.getInputMonitor().updateInputWindowsLw(true /*force*/);
+            cleanUpTaskPositioner();
             return false;
         }
 
@@ -199,12 +197,21 @@ class TaskPositioningController {
             if (DEBUG_TASK_POSITIONING) Slog.d(TAG_WM, "finishPositioning");
 
             synchronized (mService.mGlobalLock) {
-                if (mTaskPositioner != null) {
-                    mTaskPositioner.unregister();
-                    mTaskPositioner = null;
-                }
+                cleanUpTaskPositioner();
                 mPositioningDisplay = null;
             }
         });
     }
+
+    private void cleanUpTaskPositioner() {
+        final TaskPositioner positioner = mTaskPositioner;
+        if (positioner == null) {
+            return;
+        }
+
+        // We need to assign task positioner to null first to indicate that we're finishing task
+        // positioning.
+        mTaskPositioner = null;
+        positioner.unregister();
+    }
 }