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/*
* Copyright (C) 2018 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.launcher3;
import static com.android.launcher3.Utilities.SINGLE_FRAME_MS;
import static com.android.launcher3.Utilities.postAsyncCallback;
import static com.android.systemui.shared.recents.utilities.Utilities
.postAtFrontOfQueueAsynchronously;
import android.animation.Animator;
import android.animation.AnimatorListenerAdapter;
import android.animation.AnimatorSet;
import android.annotation.TargetApi;
import android.os.Build;
import android.os.Handler;
import com.android.systemui.shared.system.RemoteAnimationRunnerCompat;
import com.android.systemui.shared.system.RemoteAnimationTargetCompat;
import androidx.annotation.BinderThread;
import androidx.annotation.UiThread;
@TargetApi(Build.VERSION_CODES.P)
public abstract class LauncherAnimationRunner implements RemoteAnimationRunnerCompat {
private final Handler mHandler;
private final boolean mStartAtFrontOfQueue;
private AnimationResult mAnimationResult;
/**
* @param startAtFrontOfQueue If true, the animation start will be posted at the front of the
* queue to minimize latency.
*/
public LauncherAnimationRunner(Handler handler, boolean startAtFrontOfQueue) {
mHandler = handler;
mStartAtFrontOfQueue = startAtFrontOfQueue;
}
@BinderThread
@Override
public void onAnimationStart(RemoteAnimationTargetCompat[] targetCompats, Runnable runnable) {
Runnable r = () -> {
finishExistingAnimation();
mAnimationResult = new AnimationResult(runnable);
onCreateAnimation(targetCompats, mAnimationResult);
};
if (mStartAtFrontOfQueue) {
postAtFrontOfQueueAsynchronously(mHandler, r);
} else {
postAsyncCallback(mHandler, r);
}
}
/**
* Called on the UI thread when the animation targets are received. The implementation must
* call {@link AnimationResult#setAnimation(AnimatorSet)} with the target animation to be run.
*/
@UiThread
public abstract void onCreateAnimation(
RemoteAnimationTargetCompat[] targetCompats, AnimationResult result);
@UiThread
private void finishExistingAnimation() {
if (mAnimationResult != null) {
mAnimationResult.finish();
mAnimationResult = null;
}
}
/**
* Called by the system
*/
@BinderThread
@Override
public void onAnimationCancelled() {
postAsyncCallback(mHandler, this::finishExistingAnimation);
}
public static final class AnimationResult {
private final Runnable mFinishRunnable;
private AnimatorSet mAnimator;
private boolean mFinished = false;
private boolean mInitialized = false;
private AnimationResult(Runnable finishRunnable) {
mFinishRunnable = finishRunnable;
}
@UiThread
private void finish() {
if (!mFinished) {
mFinishRunnable.run();
mFinished = true;
}
}
@UiThread
public void setAnimation(AnimatorSet animation) {
if (mInitialized) {
throw new IllegalStateException("Animation already initialized");
}
mInitialized = true;
mAnimator = animation;
if (mAnimator == null) {
finish();
} else if (mFinished) {
// Animation callback was already finished, skip the animation.
mAnimator.start();
mAnimator.end();
} else {
// Start the animation
mAnimator.addListener(new AnimatorListenerAdapter() {
@Override
public void onAnimationEnd(Animator animation) {
finish();
}
});
mAnimator.start();
// Because t=0 has the app icon in its original spot, we can skip the
// first frame and have the same movement one frame earlier.
mAnimator.setCurrentPlayTime(SINGLE_FRAME_MS);
}
}
}
}
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