1 /* 2 * Copyright (C) 2022 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.wm.shell.back; 18 19 import static android.view.WindowManager.TRANSIT_OLD_UNSET; 20 21 import android.annotation.NonNull; 22 import android.os.RemoteException; 23 import android.util.Log; 24 import android.view.IRemoteAnimationFinishedCallback; 25 import android.view.IRemoteAnimationRunner; 26 import android.view.RemoteAnimationTarget; 27 import android.window.IBackAnimationRunner; 28 import android.window.IOnBackInvokedCallback; 29 30 /** 31 * Used to register the animation callback and runner, it will trigger result if gesture was finish 32 * before it received IBackAnimationRunner#onAnimationStart, so the controller could continue 33 * trigger the real back behavior. 34 */ 35 class BackAnimationRunner { 36 private static final String TAG = "ShellBackPreview"; 37 38 private final IOnBackInvokedCallback mCallback; 39 private final IRemoteAnimationRunner mRunner; 40 41 // Whether we are waiting to receive onAnimationStart 42 private boolean mWaitingAnimation; 43 44 /** True when the back animation is cancelled */ 45 private boolean mAnimationCancelled; 46 BackAnimationRunner(@onNull IOnBackInvokedCallback callback, @NonNull IRemoteAnimationRunner runner)47 BackAnimationRunner(@NonNull IOnBackInvokedCallback callback, 48 @NonNull IRemoteAnimationRunner runner) { 49 mCallback = callback; 50 mRunner = runner; 51 } 52 53 /** Returns the registered animation runner */ getRunner()54 IRemoteAnimationRunner getRunner() { 55 return mRunner; 56 } 57 58 /** Returns the registered animation callback */ getCallback()59 IOnBackInvokedCallback getCallback() { 60 return mCallback; 61 } 62 63 /** 64 * Called from {@link IBackAnimationRunner}, it will deliver these 65 * {@link RemoteAnimationTarget}s to the corresponding runner. 66 */ startAnimation(RemoteAnimationTarget[] apps, RemoteAnimationTarget[] wallpapers, RemoteAnimationTarget[] nonApps, Runnable finishedCallback)67 void startAnimation(RemoteAnimationTarget[] apps, RemoteAnimationTarget[] wallpapers, 68 RemoteAnimationTarget[] nonApps, Runnable finishedCallback) { 69 final IRemoteAnimationFinishedCallback callback = 70 new IRemoteAnimationFinishedCallback.Stub() { 71 @Override 72 public void onAnimationFinished() { 73 finishedCallback.run(); 74 } 75 }; 76 mWaitingAnimation = false; 77 try { 78 getRunner().onAnimationStart(TRANSIT_OLD_UNSET, apps, wallpapers, 79 nonApps, callback); 80 } catch (RemoteException e) { 81 Log.w(TAG, "Failed call onAnimationStart", e); 82 } 83 } 84 startGesture()85 void startGesture() { 86 mWaitingAnimation = true; 87 mAnimationCancelled = false; 88 } 89 isWaitingAnimation()90 boolean isWaitingAnimation() { 91 return mWaitingAnimation; 92 } 93 cancelAnimation()94 void cancelAnimation() { 95 mWaitingAnimation = false; 96 mAnimationCancelled = true; 97 } 98 isAnimationCancelled()99 boolean isAnimationCancelled() { 100 return mAnimationCancelled; 101 } 102 resetWaitingAnimation()103 void resetWaitingAnimation() { 104 mWaitingAnimation = false; 105 } 106 } 107