ComposeNavGraphNavigator.kt
/*
* Copyright 2023 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.navigation.compose
import androidx.compose.animation.AnimatedContentTransitionScope
import androidx.compose.animation.EnterTransition
import androidx.compose.animation.ExitTransition
import androidx.navigation.NavBackStackEntry
import androidx.navigation.NavGraph
import androidx.navigation.NavGraphNavigator
import androidx.navigation.Navigator
import androidx.navigation.NavigatorProvider
/**
* Custom subclass of [NavGraphNavigator] that adds support for defining
* transitions at the navigation graph level.
*/
@Navigator.Name("navigation")
internal class ComposeNavGraphNavigator(
navigatorProvider: NavigatorProvider
) : NavGraphNavigator(navigatorProvider) {
override fun createDestination(): NavGraph {
return ComposeNavGraph(this)
}
internal class ComposeNavGraph(
navGraphNavigator: Navigator<out NavGraph>
) : NavGraph(navGraphNavigator) {
internal var enterTransition: (@JvmSuppressWildcards
AnimatedContentTransitionScope<NavBackStackEntry>.() -> EnterTransition?)? = null
internal var exitTransition: (@JvmSuppressWildcards
AnimatedContentTransitionScope<NavBackStackEntry>.() -> ExitTransition?)? = null
internal var popEnterTransition: (@JvmSuppressWildcards
AnimatedContentTransitionScope<NavBackStackEntry>.() -> EnterTransition?)? = null
internal var popExitTransition: (@JvmSuppressWildcards
AnimatedContentTransitionScope<NavBackStackEntry>.() -> ExitTransition?)? = null
}
}