AnimatedVisibilityClock.kt
/*
* Copyright 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 androidx.compose.ui.tooling.animation.clock
import androidx.compose.animation.AnimatedVisibility
import androidx.compose.animation.tooling.ComposeAnimatedProperty
import androidx.compose.animation.tooling.TransitionInfo
import androidx.compose.ui.tooling.animation.AnimatedVisibilityComposeAnimation
import androidx.compose.ui.tooling.animation.states.AnimatedVisibilityState
/**
* [ComposeAnimationClock] for [AnimatedVisibility] animations.
*
* Note: [AnimatedVisibility] extension function for Transition will be controlled by
* [TransitionClock] instead.
*
* @sample androidx.compose.animation.samples.AnimatedVisibilityWithBooleanVisibleParamNoReceiver
*/
internal class AnimatedVisibilityClock(override val animation: AnimatedVisibilityComposeAnimation) :
ComposeAnimationClock<AnimatedVisibilityComposeAnimation, AnimatedVisibilityState> {
override var state: AnimatedVisibilityState =
if (animation.animationObject.currentState) {
AnimatedVisibilityState.Exit
} else {
AnimatedVisibilityState.Enter
}
set(value) {
field = value
setClockTime(0)
}
override fun setStateParameters(par1: Any, par2: Any?) {
state = par1 as AnimatedVisibilityState
}
override fun getMaxDurationPerIteration(): Long {
return nanosToMillis(animation.childTransition?.totalDurationNanos ?: return 0)
}
override fun getMaxDuration(): Long {
return nanosToMillis(animation.childTransition?.totalDurationNanos ?: return 0)
}
override fun setClockTime(animationTimeNanos: Long) {
animation.animationObject.let {
val (current, target) = state.toCurrentTargetPair()
it.setPlaytimeAfterInitialAndTargetStateEstablished(current, target, animationTimeNanos)
}
}
override fun getTransitions(stepMillis: Long): List<TransitionInfo> {
animation.childTransition?.let { child ->
return child.allAnimations().map {
it.createTransitionInfo(stepMillis)
}.sortedBy { it.label }.filter { !IGNORE_TRANSITIONS.contains(it.label) }
}
return emptyList()
}
override fun getAnimatedProperties(): List<ComposeAnimatedProperty> {
animation.childTransition?.let { child ->
return child.allAnimations().mapNotNull {
ComposeAnimatedProperty(it.label, it.value ?: return@mapNotNull null)
}.sortedBy { it.label }.filter { !IGNORE_TRANSITIONS.contains(it.label) }
}
return emptyList()
}
private fun AnimatedVisibilityState.toCurrentTargetPair() =
if (this == AnimatedVisibilityState.Enter) false to true else true to false
}