128 lines
4.4 KiB
Kotlin
128 lines
4.4 KiB
Kotlin
/*
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* Copyright (C) 2022 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.intentresolver
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import android.app.SharedElementCallback
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import android.view.View
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import androidx.activity.ComponentActivity
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import androidx.lifecycle.lifecycleScope
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import com.android.intentresolver.widget.ImagePreviewView.TransitionElementStatusCallback
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import com.android.internal.annotations.VisibleForTesting
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import kotlinx.coroutines.Job
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import kotlinx.coroutines.delay
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import kotlinx.coroutines.launch
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import java.util.function.Supplier
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/**
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* A helper class to track app's readiness for the scene transition animation.
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* The app is ready when both the image is laid out and the drawer offset is calculated.
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*/
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@VisibleForTesting(visibility = VisibleForTesting.Visibility.PACKAGE)
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class EnterTransitionAnimationDelegate(
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private val activity: ComponentActivity,
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private val transitionTargetSupplier: Supplier<View?>,
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) : View.OnLayoutChangeListener, TransitionElementStatusCallback {
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private val transitionElements = HashSet<String>()
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private var previewReady = false
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private var offsetCalculated = false
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private var timeoutJob: Job? = null
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init {
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activity.setEnterSharedElementCallback(
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object : SharedElementCallback() {
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override fun onMapSharedElements(
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names: MutableList<String>, sharedElements: MutableMap<String, View>
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) {
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this@EnterTransitionAnimationDelegate.onMapSharedElements(
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names, sharedElements
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)
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}
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})
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}
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fun postponeTransition() {
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activity.postponeEnterTransition()
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timeoutJob = activity.lifecycleScope.launch {
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delay(activity.resources.getInteger(R.integer.config_shortAnimTime).toLong())
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onTimeout()
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}
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}
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private fun onTimeout() {
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// We only mark the preview readiness and not the offset readiness
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// (see [#markOffsetCalculated()]) as this is what legacy logic, effectively, did. We might
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// want to review that aspect separately.
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onAllTransitionElementsReady()
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}
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override fun onTransitionElementReady(name: String) {
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transitionElements.add(name)
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}
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override fun onAllTransitionElementsReady() {
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timeoutJob?.cancel()
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if (!previewReady) {
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previewReady = true
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maybeStartListenForLayout()
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}
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}
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fun markOffsetCalculated() {
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if (!offsetCalculated) {
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offsetCalculated = true
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maybeStartListenForLayout()
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}
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}
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private fun onMapSharedElements(
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names: MutableList<String>,
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sharedElements: MutableMap<String, View>
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) {
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names.removeAll { !transitionElements.contains(it) }
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sharedElements.entries.removeAll { !transitionElements.contains(it.key) }
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}
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private fun maybeStartListenForLayout() {
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val drawer = transitionTargetSupplier.get()
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if (previewReady && offsetCalculated && drawer != null) {
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if (drawer.isInLayout) {
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startPostponedEnterTransition()
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} else {
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drawer.addOnLayoutChangeListener(this)
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drawer.requestLayout()
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}
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}
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}
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override fun onLayoutChange(
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v: View,
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left: Int, top: Int, right: Int, bottom: Int,
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oldLeft: Int, oldTop: Int, oldRight: Int, oldBottom: Int
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) {
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v.removeOnLayoutChangeListener(this)
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startPostponedEnterTransition()
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}
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private fun startPostponedEnterTransition() {
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if (transitionElements.isNotEmpty() && activity.isActivityTransitionRunning) {
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// Disable the window animations as it interferes with the transition animation.
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activity.window.setWindowAnimations(0)
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}
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activity.startPostponedEnterTransition()
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}
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}
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