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/*
* Copyright (C) 2021 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 androidx.window.extensions.embedding;
import static android.view.RemoteAnimationTarget.MODE_CLOSING;
import android.app.ActivityThread;
import android.content.ContentResolver;
import android.content.Context;
import android.database.ContentObserver;
import android.graphics.Rect;
import android.os.Handler;
import android.provider.Settings;
import android.view.RemoteAnimationTarget;
import android.view.animation.AlphaAnimation;
import android.view.animation.Animation;
import android.view.animation.AnimationSet;
import android.view.animation.AnimationUtils;
import android.view.animation.ClipRectAnimation;
import android.view.animation.Interpolator;
import android.view.animation.LinearInterpolator;
import android.view.animation.ScaleAnimation;
import android.view.animation.TranslateAnimation;
import androidx.annotation.NonNull;
import com.android.internal.R;
import com.android.internal.policy.AttributeCache;
import com.android.internal.policy.TransitionAnimation;
/** Animation spec for TaskFragment transition. */
// TODO(b/206557124): provide an easier way to customize animation
class TaskFragmentAnimationSpec {
private static final String TAG = "TaskFragAnimationSpec";
private static final int CHANGE_ANIMATION_DURATION = 517;
private static final int CHANGE_ANIMATION_FADE_DURATION = 80;
private static final int CHANGE_ANIMATION_FADE_OFFSET = 30;
private final Context mContext;
private final TransitionAnimation mTransitionAnimation;
private final Interpolator mFastOutExtraSlowInInterpolator;
private final LinearInterpolator mLinearInterpolator;
private float mTransitionAnimationScaleSetting;
TaskFragmentAnimationSpec(@NonNull Handler handler) {
mContext = ActivityThread.currentActivityThread().getApplication();
mTransitionAnimation = new TransitionAnimation(mContext, false /* debug */, TAG);
// Initialize the AttributeCache for the TransitionAnimation.
AttributeCache.init(mContext);
mFastOutExtraSlowInInterpolator = AnimationUtils.loadInterpolator(
mContext, android.R.interpolator.fast_out_extra_slow_in);
mLinearInterpolator = new LinearInterpolator();
// The transition animation should be adjusted based on the developer option.
final ContentResolver resolver = mContext.getContentResolver();
mTransitionAnimationScaleSetting = Settings.Global.getFloat(resolver,
Settings.Global.TRANSITION_ANIMATION_SCALE,
mContext.getResources().getFloat(
R.dimen.config_appTransitionAnimationDurationScaleDefault));
resolver.registerContentObserver(
Settings.Global.getUriFor(Settings.Global.TRANSITION_ANIMATION_SCALE), false,
new SettingsObserver(handler));
}
/** For target that doesn't need to be animated. */
static Animation createNoopAnimation(@NonNull RemoteAnimationTarget target) {
// Noop but just keep the target showing/hiding.
final float alpha = target.mode == MODE_CLOSING ? 0f : 1f;
return new AlphaAnimation(alpha, alpha);
}
/** Animation for target that is opening in a change transition. */
Animation createChangeBoundsOpenAnimation(@NonNull RemoteAnimationTarget target) {
final Rect bounds = target.localBounds;
// The target will be animated in from left or right depends on its position.
final int startLeft = bounds.left == 0 ? -bounds.width() : bounds.width();
// The position should be 0-based as we will post translate in
// TaskFragmentAnimationAdapter#onAnimationUpdate
final Animation animation = new TranslateAnimation(startLeft, 0, 0, 0);
animation.setInterpolator(mFastOutExtraSlowInInterpolator);
animation.setDuration(CHANGE_ANIMATION_DURATION);
animation.initialize(bounds.width(), bounds.height(), bounds.width(), bounds.height());
animation.scaleCurrentDuration(mTransitionAnimationScaleSetting);
return animation;
}
/** Animation for target that is closing in a change transition. */
Animation createChangeBoundsCloseAnimation(@NonNull RemoteAnimationTarget target) {
final Rect bounds = target.localBounds;
// The target will be animated out to left or right depends on its position.
final int endLeft = bounds.left == 0 ? -bounds.width() : bounds.width();
// The position should be 0-based as we will post translate in
// TaskFragmentAnimationAdapter#onAnimationUpdate
final Animation animation = new TranslateAnimation(0, endLeft, 0, 0);
animation.setInterpolator(mFastOutExtraSlowInInterpolator);
animation.setDuration(CHANGE_ANIMATION_DURATION);
animation.initialize(bounds.width(), bounds.height(), bounds.width(), bounds.height());
animation.scaleCurrentDuration(mTransitionAnimationScaleSetting);
return animation;
}
/**
* Animation for target that is changing (bounds change) in a change transition.
* @return the return array always has two elements. The first one is for the start leash, and
* the second one is for the end leash.
*/
Animation[] createChangeBoundsChangeAnimations(@NonNull RemoteAnimationTarget target) {
// Both start bounds and end bounds are in screen coordinates. We will post translate
// to the local coordinates in TaskFragmentAnimationAdapter#onAnimationUpdate
final Rect startBounds = target.startBounds;
final Rect parentBounds = target.taskInfo.configuration.windowConfiguration.getBounds();
final Rect endBounds = target.screenSpaceBounds;
float scaleX = ((float) startBounds.width()) / endBounds.width();
float scaleY = ((float) startBounds.height()) / endBounds.height();
// Start leash is a child of the end leash. Reverse the scale so that the start leash won't
// be scaled up with its parent.
float startScaleX = 1.f / scaleX;
float startScaleY = 1.f / scaleY;
// The start leash will be fade out.
final AnimationSet startSet = new AnimationSet(false /* shareInterpolator */);
final Animation startAlpha = new AlphaAnimation(1f, 0f);
startAlpha.setInterpolator(mLinearInterpolator);
startAlpha.setDuration(CHANGE_ANIMATION_FADE_DURATION);
startAlpha.setStartOffset(CHANGE_ANIMATION_FADE_OFFSET);
startSet.addAnimation(startAlpha);
final Animation startScale = new ScaleAnimation(startScaleX, startScaleX, startScaleY,
startScaleY);
startScale.setInterpolator(mFastOutExtraSlowInInterpolator);
startScale.setDuration(CHANGE_ANIMATION_DURATION);
startSet.addAnimation(startScale);
startSet.initialize(startBounds.width(), startBounds.height(), endBounds.width(),
endBounds.height());
startSet.scaleCurrentDuration(mTransitionAnimationScaleSetting);
// The end leash will be moved into the end position while scaling.
final AnimationSet endSet = new AnimationSet(true /* shareInterpolator */);
endSet.setInterpolator(mFastOutExtraSlowInInterpolator);
final Animation endScale = new ScaleAnimation(scaleX, 1, scaleY, 1);
endScale.setDuration(CHANGE_ANIMATION_DURATION);
endSet.addAnimation(endScale);
// The position should be 0-based as we will post translate in
// TaskFragmentAnimationAdapter#onAnimationUpdate
final Animation endTranslate = new TranslateAnimation(startBounds.left - endBounds.left, 0,
0, 0);
endTranslate.setDuration(CHANGE_ANIMATION_DURATION);
endSet.addAnimation(endTranslate);
// The end leash is resizing, we should update the window crop based on the clip rect.
final Rect startClip = new Rect(startBounds);
final Rect endClip = new Rect(endBounds);
startClip.offsetTo(0, 0);
endClip.offsetTo(0, 0);
final Animation clipAnim = new ClipRectAnimation(startClip, endClip);
clipAnim.setDuration(CHANGE_ANIMATION_DURATION);
endSet.addAnimation(clipAnim);
endSet.initialize(startBounds.width(), startBounds.height(), parentBounds.width(),
parentBounds.height());
endSet.scaleCurrentDuration(mTransitionAnimationScaleSetting);
return new Animation[]{startSet, endSet};
}
Animation loadOpenAnimation(@NonNull RemoteAnimationTarget target,
@NonNull Rect wholeAnimationBounds) {
final boolean isEnter = target.mode != MODE_CLOSING;
final Animation animation = mTransitionAnimation.loadDefaultAnimationRes(isEnter
? com.android.internal.R.anim.task_fragment_open_enter
: com.android.internal.R.anim.task_fragment_open_exit);
animation.initialize(target.localBounds.width(), target.localBounds.height(),
wholeAnimationBounds.width(), wholeAnimationBounds.height());
animation.scaleCurrentDuration(mTransitionAnimationScaleSetting);
return animation;
}
Animation loadCloseAnimation(@NonNull RemoteAnimationTarget target,
@NonNull Rect wholeAnimationBounds) {
final boolean isEnter = target.mode != MODE_CLOSING;
final Animation animation = mTransitionAnimation.loadDefaultAnimationRes(isEnter
? com.android.internal.R.anim.task_fragment_close_enter
: com.android.internal.R.anim.task_fragment_close_exit);
animation.initialize(target.localBounds.width(), target.localBounds.height(),
wholeAnimationBounds.width(), wholeAnimationBounds.height());
animation.scaleCurrentDuration(mTransitionAnimationScaleSetting);
return animation;
}
private class SettingsObserver extends ContentObserver {
SettingsObserver(@NonNull Handler handler) {
super(handler);
}
@Override
public void onChange(boolean selfChange) {
mTransitionAnimationScaleSetting = Settings.Global.getFloat(
mContext.getContentResolver(), Settings.Global.TRANSITION_ANIMATION_SCALE,
mTransitionAnimationScaleSetting);
}
}
}
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