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Merge pull request #727 from Orange-OpenSource/19-ods-module-about
19 - ODS About module
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100 changes: 100 additions & 0 deletions
100
app/src/main/java/com/orange/ods/app/ui/AppNavigation.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,100 @@ | ||
| /* | ||
| * | ||
| * Copyright 2021 Orange | ||
| * | ||
| * Use of this source code is governed by an MIT-style | ||
| * license that can be found in the LICENSE file or at | ||
| * https://opensource.org/licenses/MIT. | ||
| * / | ||
| */ | ||
|
|
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| package com.orange.ods.app.ui | ||
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| import androidx.compose.runtime.Composable | ||
| import androidx.compose.runtime.remember | ||
| import androidx.lifecycle.Lifecycle | ||
| import androidx.navigation.NavBackStackEntry | ||
| import androidx.navigation.NavController | ||
| import androidx.navigation.NavDestination | ||
| import androidx.navigation.NavGraph | ||
| import androidx.navigation.NavHostController | ||
| import androidx.navigation.compose.currentBackStackEntryAsState | ||
| import androidx.navigation.compose.rememberNavController | ||
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| @Composable | ||
| fun rememberAppNavigationState(navController: NavHostController = rememberNavController()) = remember(navController) { AppNavigationState(navController) } | ||
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| class AppNavigationState(val navController: NavHostController) { | ||
| val previousRoute: String? | ||
| get() = navController.previousBackStackEntry?.destination?.route | ||
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| val currentRoute: String? | ||
| get() = navController.currentDestination?.route | ||
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| val currentScreen: Screen? | ||
| @Composable get() { | ||
| val routeArgs = navController.currentBackStackEntryAsState().value?.arguments | ||
| return currentRoute?.let { getScreen(it, routeArgs) } | ||
| } | ||
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| fun navigateToBottomBarRoute(route: String) { | ||
| if (route != currentRoute) { | ||
| navController.navigateToBottomBarRoute(route) | ||
| } | ||
| } | ||
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| fun navigateToElement(route: String, elementId: Long?, from: NavBackStackEntry) { | ||
| // In order to discard duplicated navigation events, we check the Lifecycle | ||
| if (from.lifecycleIsResumed()) { | ||
| val fullRoute = if (elementId != null) "$route/$elementId" else route | ||
| navController.navigate(fullRoute) | ||
| } | ||
| } | ||
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| fun upPress() { | ||
| navController.navigateUp() | ||
| } | ||
| } | ||
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| fun NavController.navigateToElement(route: String, elementId: Long?, from: NavBackStackEntry) { | ||
| // In order to discard duplicated navigation events, we check the Lifecycle | ||
| if (from.lifecycleIsResumed()) { | ||
| val fullRoute = if (elementId != null) "$route/$elementId" else route | ||
| navigate(fullRoute) | ||
| } | ||
| } | ||
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| fun NavController.navigateToBottomBarRoute(route: String) { | ||
| navigate(route) { | ||
| // Avoid multiple copies of the same destination when | ||
| // reselecting the same item | ||
| launchSingleTop = true | ||
| // Restore state when reselecting a previously selected item | ||
| restoreState = true | ||
| // Pop up backstack to the first destination and save state. This makes going back | ||
| // to the start destination when pressing back in any other bottom tab. | ||
| popUpTo(findStartDestination(graph).id) { | ||
| saveState = true | ||
| } | ||
| } | ||
| } | ||
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| /** | ||
| * If the lifecycle is not resumed it means this NavBackStackEntry already processed a nav event. | ||
| * | ||
| * This is used to de-duplicate navigation events. | ||
| */ | ||
| private fun NavBackStackEntry.lifecycleIsResumed() = | ||
| this.getLifecycle().currentState == Lifecycle.State.RESUMED | ||
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| private val NavGraph.startDestination: NavDestination? | ||
| get() = findNode(startDestinationId) | ||
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| /** | ||
| * Copied from similar function in NavigationUI.kt | ||
| * | ||
| * https://cs.android.com/androidx/platform/frameworks/support/+/androidx-main:navigation/navigation-ui/src/main/java/androidx/navigation/ui/NavigationUI.kt | ||
| */ | ||
| private tailrec fun findStartDestination(graph: NavDestination): NavDestination { | ||
| return if (graph is NavGraph) findStartDestination(graph.startDestination!!) else graph | ||
| } |
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