Merge "[ShellTransition]: add WMS#setRecentsAppBehindSystemBars for recents" into tm-dev am: b419fc8e09

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/16972226

Change-Id: Ie99d36d5ea10043dc2423a390ce8a659bf3f6f96

core/java/android/view/IWindowManager.aidl

@@ -955,4 +955,10 @@ interface IWindowManager
      * @hide
      */
     Bitmap snapshotTaskForRecents(int taskId);
+
+    /**
+     * Informs the system whether the recents app is currently behind the system bars. If so,
+     * means the recents app can control the SystemUI flags, and vice-versa.
+     */
+    void setRecentsAppBehindSystemBars(boolean behindSystemBars);
 }

core/java/android/view/WindowManagerGlobal.java

@@ -752,6 +752,14 @@ public final class WindowManagerGlobal {
     public void removeWindowlessRoot(ViewRootImpl impl) {
         synchronized (mLock) {
             mWindowlessRoots.remove(impl);
+	}
+    }
+
+    public void setRecentsAppBehindSystemBars(boolean behindSystemBars) {
+        try {
+            getWindowManagerService().setRecentsAppBehindSystemBars(behindSystemBars);
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
         }
     }
 }

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

@@ -80,9 +80,12 @@ import android.window.TransitionInfo;
 
 import com.android.internal.annotations.VisibleForTesting;
 import com.android.internal.graphics.ColorUtils;
+import com.android.internal.inputmethod.SoftInputShowHideReason;
 import com.android.internal.protolog.ProtoLogGroup;
 import com.android.internal.protolog.common.ProtoLog;
 import com.android.internal.util.function.pooled.PooledLambda;
+import com.android.server.LocalServices;
+import com.android.server.inputmethod.InputMethodManagerInternal;
 
 import java.lang.annotation.Retention;
 import java.lang.annotation.RetentionPolicy;
@@ -552,14 +555,24 @@ class Transition extends Binder implements BLASTSyncEngine.TransactionReadyListe
                 asyncRotationController.onTransitionFinished();
             }
             if (mTransientLaunches != null) {
+                InsetsControlTarget prevImeTarget = dc.getImeTarget(
+                        DisplayContent.IME_TARGET_CONTROL);
+                InsetsControlTarget newImeTarget = null;
                 // Transient-launch activities cannot be IME target (WindowState#canBeImeTarget),
                 // so re-compute in case the IME target is changed after transition.
                 for (int t = 0; t < mTransientLaunches.size(); ++t) {
                     if (mTransientLaunches.keyAt(t).getDisplayContent() == dc) {
-                        dc.computeImeTarget(true /* updateImeTarget */);
+                        newImeTarget = dc.computeImeTarget(true /* updateImeTarget */);
                         break;
                     }
                 }
+                if (mRecentsDisplayId != INVALID_DISPLAY && prevImeTarget == newImeTarget) {
+                    // Restore IME icon only when moving the original app task to front from
+                    // recents, in case IME icon may missing if the moving task has already been
+                    // the current focused task.
+                    InputMethodManagerInternal.get().updateImeWindowStatus(
+                            false /* disableImeIcon */);
+                }
             }
             dc.handleCompleteDeferredRemoval();
         }
@@ -781,6 +794,26 @@ class Transition extends Binder implements BLASTSyncEngine.TransactionReadyListe
             }
         }
 
+        // Hiding IME/IME icon when starting quick-step with resents animation.
+        if (!mTargetDisplays.get(mRecentsDisplayId).isImeAttachedToApp()) {
+            // Hiding IME if IME window is not attached to app.
+            // Since some windowing mode is not proper to snapshot Task with IME window
+            // while the app transitioning to the next task (e.g. split-screen mode)
+            final InputMethodManagerInternal inputMethodManagerInternal =
+                    LocalServices.getService(InputMethodManagerInternal.class);
+            if (inputMethodManagerInternal != null) {
+                inputMethodManagerInternal.hideCurrentInputMethod(
+                        SoftInputShowHideReason.HIDE_RECENTS_ANIMATION);
+            }
+        } else {
+            // Disable IME icon explicitly when IME attached to the app in case
+            // IME icon might flickering while swiping to the next app task still
+            // in animating before the next app window focused, or IME icon
+            // persists on the bottom when swiping the task to recents.
+            InputMethodManagerInternal.get().updateImeWindowStatus(
+                    true /* disableImeIcon */);
+        }
+
         // The rest of this function handles nav-bar reparenting
 
         if (!dc.getDisplayPolicy().shouldAttachNavBarToAppDuringTransition()

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

@@ -16,7 +16,6 @@
 
 package com.android.server.wm;
 
-import static android.app.WindowConfiguration.ACTIVITY_TYPE_HOME;
 import static android.view.WindowManager.TRANSIT_CHANGE;
 import static android.view.WindowManager.TRANSIT_CLOSE;
 import static android.view.WindowManager.TRANSIT_FLAG_IS_RECENTS;
@@ -514,8 +513,13 @@ class TransitionController {
 
         // TODO(b/188669821): Remove once legacy recents behavior is moved to shell.
         // Also interpret HOME transient launch as recents
-        if (activity.getActivityType() == ACTIVITY_TYPE_HOME) {
+        if (activity.isActivityTypeHomeOrRecents()) {
             mCollectingTransition.addFlag(TRANSIT_FLAG_IS_RECENTS);
+            // When starting recents animation, we assume the recents activity is behind the app
+            // task and should not affect system bar appearance,
+            // until WMS#setRecentsAppBehindSystemBars be called from launcher when passing
+            // the gesture threshold.
+            activity.getTask().setCanAffectSystemUiFlags(false);
         }
     }
 

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

@@ -25,6 +25,7 @@ import static android.Manifest.permission.MODIFY_TOUCH_MODE_STATE;
 import static android.Manifest.permission.READ_FRAME_BUFFER;
 import static android.Manifest.permission.REGISTER_WINDOW_MANAGER_LISTENERS;
 import static android.Manifest.permission.RESTRICTED_VR_ACCESS;
+import static android.Manifest.permission.START_TASKS_FROM_RECENTS;
 import static android.Manifest.permission.WRITE_SECURE_SETTINGS;
 import static android.app.ActivityManagerInternal.ALLOW_FULL_ONLY;
 import static android.app.ActivityManagerInternal.ALLOW_NON_FULL;
@@ -8983,4 +8984,24 @@ public class WindowManagerService extends IWindowManager.Stub
         return Bitmap.wrapHardwareBuffer(taskSnapshot.getHardwareBuffer(),
                 taskSnapshot.getColorSpace());
     }
+
+    @Override
+    public void setRecentsAppBehindSystemBars(boolean behindSystemBars) {
+        if (!checkCallingPermission(START_TASKS_FROM_RECENTS, "setRecentsAppBehindSystemBars()")) {
+            throw new SecurityException("Requires START_TASKS_FROM_RECENTS permission");
+        }
+        final long token = Binder.clearCallingIdentity();
+        try {
+            synchronized (mGlobalLock) {
+                final Task recentsApp = mRoot.getTask(task -> task.isActivityTypeHomeOrRecents()
+                        && task.getTopVisibleActivity() != null);
+                if (recentsApp != null) {
+                    recentsApp.getTask().setCanAffectSystemUiFlags(behindSystemBars);
+                    mWindowPlacerLocked.requestTraversal();
+                }
+            }
+        } finally {
+            Binder.restoreCallingIdentity(token);
+        }
+    }
 }