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add Navigator.previousEntry #255

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merged 1 commit into from
Feb 1, 2024
Merged

add Navigator.previousEntry #255

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3 changes: 3 additions & 0 deletions precompose/src/commonMain/kotlin/moe/tlaster/precompose/navigation/BackStackManager.kt
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Original file line number Diff line number Diff line change
Expand Up @@ -56,6 +56,9 @@ internal class BackStackManager : LifecycleObserver {
val currentBackStackEntry: Flow<BackStackEntry?>
get() = backStacks.asSharedFlow().map { it.lastOrNull() }

val prevBackStackEntry: Flow<BackStackEntry?>
get() = backStacks.asSharedFlow().map { it.dropLast(1).lastOrNull() }

val canGoBack: Flow<Boolean>
get() = backStacks.asSharedFlow().map { it.size > 1 }

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6 changes: 6 additions & 0 deletions precompose/src/commonMain/kotlin/moe/tlaster/precompose/navigation/Navigator.kt
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Expand Up @@ -146,6 +146,12 @@ class Navigator {
*/
val currentEntry = stackManager.currentBackStackEntry

/**
* Previous route
* @ return Returns the previous navigation back stack entry.
*/
val previousEntry = stackManager.prevBackStackEntry

/**
* Check if navigator can navigate, it will be false when performing navigation animation.
* @return Returns true if navigator can perform navigation, false otherwise.
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