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A pragmatic navigation library for Jetpack Compose

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package cafe.adriel.voyager.transitions

import androidx.compose.animation.core.FiniteAnimationSpec
import androidx.compose.animation.core.Spring
import androidx.compose.animation.core.spring
import androidx.compose.animation.fadeIn
import androidx.compose.animation.fadeOut
import androidx.compose.animation.togetherWith
import androidx.compose.runtime.Composable
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import cafe.adriel.voyager.core.annotation.ExperimentalVoyagerApi
import cafe.adriel.voyager.core.screen.Screen
import cafe.adriel.voyager.navigator.Navigator

@Composable
public fun FadeTransition(
    navigator: Navigator,
    modifier: Modifier = Modifier,
    animationSpec: FiniteAnimationSpec = spring(stiffness = Spring.StiffnessMediumLow),
    content: ScreenTransitionContent = { it.Content() }
) {
    FadeTransition(
        navigator = navigator,
        modifier = modifier,
        disposeScreenAfterTransitionEnd = false,
        animationSpec = animationSpec,
        content = content
    )
}

@ExperimentalVoyagerApi
@Composable
public fun FadeTransition(
    navigator: Navigator,
    modifier: Modifier = Modifier,
    animationSpec: FiniteAnimationSpec = spring(stiffness = Spring.StiffnessMediumLow),
    contentAlignment: Alignment = Alignment.TopStart,
    disposeScreenAfterTransitionEnd: Boolean = false,
    contentKey: (Screen) -> Any = { it.key },
    content: ScreenTransitionContent = { it.Content() }
) {
    ScreenTransition(
        navigator = navigator,
        modifier = modifier,
        contentAlignment = contentAlignment,
        disposeScreenAfterTransitionEnd = disposeScreenAfterTransitionEnd,
        contentKey = contentKey,
        content = content,
        transition = { fadeIn(animationSpec = animationSpec) togetherWith fadeOut(animationSpec = animationSpec) }
    )
}