Merge "Revert "Revert "Remove IME surface when occured in multi-window mode""" into rvc-dev

core/java/com/android/internal/view/IInputMethodManager.aidl

@@ -71,4 +71,6 @@ interface IInputMethodManager {
 
     void reportActivityView(in IInputMethodClient parentClient, int childDisplayId,
             in float[] matrixValues);
+
+    void removeImeSurface();
 }

packages/SystemUI/src/com/android/systemui/wm/DisplayImeController.java

@@ -19,11 +19,13 @@ package com.android.systemui.wm;
 import android.animation.Animator;
 import android.animation.AnimatorListenerAdapter;
 import android.animation.ValueAnimator;
+import android.content.Context;
 import android.content.res.Configuration;
 import android.graphics.Point;
 import android.graphics.Rect;
 import android.os.Handler;
 import android.os.RemoteException;
+import android.os.ServiceManager;
 import android.util.Slog;
 import android.util.SparseArray;
 import android.view.IDisplayWindowInsetsController;
@@ -36,6 +38,7 @@ import android.view.WindowInsets;
 import android.view.animation.Interpolator;
 import android.view.animation.PathInterpolator;
 
+import com.android.internal.view.IInputMethodManager;
 import com.android.systemui.TransactionPool;
 import com.android.systemui.dagger.qualifiers.Main;
 
@@ -352,6 +355,16 @@ public class DisplayImeController implements DisplayController.OnDisplaysChanged
                     dispatchEndPositioning(mDisplayId, mCancelled, t);
                     if (mAnimationDirection == DIRECTION_HIDE && !mCancelled) {
                         t.hide(mImeSourceControl.getLeash());
+                        final IInputMethodManager imms = getImms();
+                        if (imms != null) {
+                            try {
+                                // Remove the IME surface to make the insets invisible for
+                                // non-client controlled insets.
+                                imms.removeImeSurface();
+                            } catch (RemoteException e) {
+                                Slog.e(TAG, "Failed to remove IME surface.", e);
+                            }
+                        }
                     }
                     t.apply();
                     mTransactionPool.release(t);
@@ -382,9 +395,9 @@ public class DisplayImeController implements DisplayController.OnDisplaysChanged
          * Called when the IME position is starting to animate.
          *
          * @param hiddenTop The y position of the top of the IME surface when it is hidden.
-         * @param shownTop The y position of the top of the IME surface when it is shown.
-         * @param showing {@code true} when we are animating from hidden to shown, {@code false}
-         *                            when animating from shown to hidden.
+         * @param shownTop  The y position of the top of the IME surface when it is shown.
+         * @param showing   {@code true} when we are animating from hidden to shown, {@code false}
+         *                  when animating from shown to hidden.
          */
         default void onImeStartPositioning(int displayId, int hiddenTop, int shownTop,
                 boolean showing, SurfaceControl.Transaction t) {}
@@ -406,4 +419,9 @@ public class DisplayImeController implements DisplayController.OnDisplaysChanged
         default void onImeEndPositioning(int displayId, boolean cancel,
                 SurfaceControl.Transaction t) {}
     }
+
+    public IInputMethodManager getImms() {
+        return IInputMethodManager.Stub.asInterface(
+                ServiceManager.getService(Context.INPUT_METHOD_SERVICE));
+    }
 }

services/core/java/com/android/server/inputmethod/InputMethodManagerService.java

@@ -207,6 +207,7 @@ public class InputMethodManagerService extends IInputMethodManager.Stub
     static final int MSG_HIDE_CURRENT_INPUT_METHOD = 1035;
     static final int MSG_INITIALIZE_IME = 1040;
     static final int MSG_CREATE_SESSION = 1050;
+    static final int MSG_REMOVE_IME_SURFACE = 1060;
 
     static final int MSG_START_INPUT = 2000;
 
@@ -3946,6 +3947,12 @@ public class InputMethodManagerService extends IInputMethodManager.Stub
         }
     }
 
+    @Override
+    public void removeImeSurface() {
+        mContext.enforceCallingPermission(Manifest.permission.INTERNAL_SYSTEM_WINDOW, null);
+        mHandler.sendMessage(mHandler.obtainMessage(MSG_REMOVE_IME_SURFACE));
+    }
+
     @BinderThread
     private void notifyUserAction(@NonNull IBinder token) {
         if (DEBUG) {
@@ -4216,6 +4223,15 @@ public class InputMethodManagerService extends IInputMethodManager.Stub
                 args.recycle();
                 return true;
             }
+            case MSG_REMOVE_IME_SURFACE: {
+                try {
+                    if (mEnabledSession != null && mEnabledSession.session != null) {
+                        mEnabledSession.session.removeImeSurface();
+                    }
+                } catch (RemoteException e) {
+                }
+                return true;
+            }
             // ---------------------------------------------------------
 
             case MSG_START_INPUT: {

services/core/java/com/android/server/inputmethod/MultiClientInputMethodManagerService.java

@@ -1461,6 +1461,12 @@ public final class MultiClientInputMethodManagerService {
             return null;
         }
 
+        @BinderThread
+        @Override
+        public void removeImeSurface() {
+            reportNotSupported();
+        }
+
         @BinderThread
         @Override
         public boolean showSoftInput(