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/*
* Copyright (C) 2022 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.permissioncontroller.safetycenter.ui
import android.transition.AutoTransition
import android.transition.Transition
import android.transition.TransitionListenerAdapter
import android.transition.TransitionManager
import android.transition.TransitionSet
import android.view.View
import android.view.ViewGroup
import android.view.animation.LinearInterpolator
import android.widget.TextView
import java.time.Duration
/**
* An animator which can animate a fade in/fade out of either one textView, or several textViews
* that are in the same ViewGroup.
*/
class TextFadeAnimator
@JvmOverloads
constructor(targetIds: List<Int>, changeDuration: Duration = DEFAULT_TEXT_CHANGE_DURATION) {
@JvmOverloads
constructor(
targetId: Int,
changeDuration: Duration = DEFAULT_TEXT_CHANGE_DURATION
) : this(listOf(targetId), changeDuration)
private val textChangeTransition: TransitionSet
init {
var transition =
AutoTransition()
.setInterpolator(linearInterpolator)
.setDuration(changeDuration.toMillis())
for (targetId in targetIds) {
transition = transition.addTarget(targetId)
}
textChangeTransition = transition
}
@JvmOverloads
fun animateChangeText(textView: TextView, text: String, onFinish: Runnable? = null) {
animateChangeText(listOf(textView to text), onFinish)
}
/** Animate changes for a set of textViews under the same parent. */
@JvmOverloads
fun animateChangeText(textChanges: List<Pair<TextView, String>>, onFinish: Runnable? = null) {
if (textChanges.isEmpty()) {
return
}
val firstView = textChanges[0].first
val parentViewGroup: ViewGroup = firstView.parent as ViewGroup
val fadeOutTransition =
textChangeTransition
.clone()
.addListener(
object : TransitionListenerAdapter() {
override fun onTransitionStart(transition: Transition?) {
super.onTransitionStart(transition)
}
override fun onTransitionEnd(transition: Transition?) {
super.onTransitionEnd(transition)
fadeTextIn(textChanges, parentViewGroup, onFinish)
}
}
)
parentViewGroup.post {
TransitionManager.beginDelayedTransition(parentViewGroup, fadeOutTransition)
for ((textView, _) in textChanges) {
textView.visibility = View.INVISIBLE
}
}
}
private fun fadeTextIn(
textChanges: List<Pair<TextView, String>>,
parent: ViewGroup,
onFinish: Runnable?
) {
val fadeInTransition =
textChangeTransition
.clone()
.addListener(
object : TransitionListenerAdapter() {
override fun onTransitionEnd(transition: Transition?) {
super.onTransitionEnd(transition)
onFinish?.run()
}
}
)
parent.post {
TransitionManager.beginDelayedTransition(parent, fadeInTransition)
for ((textView, text) in textChanges) {
textView.text = text
textView.visibility = View.VISIBLE
}
}
}
fun cancelTextChangeAnimation(textView: TextView) {
TransitionManager.endTransitions(textView.parent as ViewGroup)
}
companion object {
// Duration is for fade-out & fade-in individually, not combined
private val DEFAULT_TEXT_CHANGE_DURATION = Duration.ofMillis(167)
private val linearInterpolator = LinearInterpolator()
}
}
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