InfiniteAnimationPolicy.kt
/*
* Copyright 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.compose.animation.core
import androidx.compose.runtime.withFrameMillis
import androidx.compose.runtime.withFrameNanos
import androidx.compose.ui.platform.InfiniteAnimationPolicy
import kotlin.coroutines.CoroutineContext
import kotlin.coroutines.coroutineContext
/**
* Like [withFrameNanos], but applies the [InfiniteAnimationPolicy] from the calling
* [CoroutineContext] if there is one.
*/
suspend fun <R> withInfiniteAnimationFrameNanos(onFrame: (frameTimeNanos: Long) -> R): R =
when (val policy = coroutineContext[InfiniteAnimationPolicy]) {
null -> withFrameNanos(onFrame)
else -> policy.onInfiniteOperation { withFrameNanos(onFrame) }
}
/**
* Like [withFrameMillis], but applies the [InfiniteAnimationPolicy] from the calling
* [CoroutineContext] if there is one.
*/
@Suppress("UnnecessaryLambdaCreation")
suspend inline fun <R> withInfiniteAnimationFrameMillis(
crossinline onFrame: (frameTimeMillis: Long) -> R
): R = withInfiniteAnimationFrameNanos { onFrame(it / 1_000_000L) }