net.peanuuutz.fork.ui.animation.TransitionState.kt Maven / Gradle / Ivy

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/*
 * Copyright 2020 The Android Open Source Project
 * Modifications Copyright 2022 Peanuuutz
 *
 * 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 net.peanuuutz.fork.ui.animation

import androidx.compose.runtime.Stable
import androidx.compose.runtime.getValue
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.setValue

@Stable
sealed interface TransitionState {
    val value: T

    var targetValue: T

    val isRunning: Boolean
}

fun  TransitionState(initialValue: T): TransitionState {
    return TransitionStateImpl(initialValue)
}

// ======== Internal ========

@Stable
internal class TransitionStateImpl(initialValue: T) : TransitionState {
    override var value: T by mutableStateOf(initialValue)

    override var targetValue: T by mutableStateOf(initialValue)

    override var isRunning: Boolean by mutableStateOf(false)
}