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Merge pull request #96 from TouchInstinct/fix/issue-93_copying_state_does_not_works 

Fix of https://github.com/TouchInstinct/RoboSwag/issues/93
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Даниил Борисовский 2019-10-28 12:30:32 +03:00 committed by GitHub
parent 24098d79f1 9ca661f60e
commit 991f1626f2
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 23 additions and 10 deletions
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33
tabbar-navigation/src/main/java/ru/touchin/roboswag/components/tabbarnavigation/BottomNavigationFragment.kt
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@ -76,7 +76,7 @@ abstract class BottomNavigationFragment : Fragment() {
class TabData(
val viewControllerClass: Class<out ViewController<*, *>>,
val viewControllerState: Parcelable,
viewControllerState: Parcelable,
/**
* It can be useful in some cases when it is necessary to create ViewController
* with initial state every time when tab opens.
@ -84,21 +84,34 @@ abstract class BottomNavigationFragment : Fragment() {
val saveStateOnSwitching: Boolean = true
) {
/**
* It is value as class body property instead of value as constructor parameter to specify
* custom getter of this field which returns copy of Parcelable every time it be called.
* This is necessary to avoid modifying this value if it would be a value as constructor parameter
* and every getting of this value would return the same instance.
*/
val viewControllerState = viewControllerState
get() = field.copy()
operator fun component1() = viewControllerClass
operator fun component2() = viewControllerState
operator fun component3() = saveStateOnSwitching
private fun Parcelable.copy(): Parcelable {
val parcel = Parcel.obtain()
this.writeToParcel(parcel, 0)
parcel.setDataPosition(0)
val result = parcel.readParcelable<Parcelable>(Thread.currentThread().contextClassLoader)
?: throw IllegalStateException("It must not be null")
parcel.recycle()
return result
}
private fun Parcelable.copy(): Parcelable =
if (this is EmptyState) {
EmptyState
} else {
val parcel = Parcel.obtain()
parcel.writeParcelable(this, 0)
parcel.setDataPosition(0)
val result = parcel.readParcelable<Parcelable>(
javaClass.classLoader ?: Thread.currentThread().contextClassLoader
) ?: throw IllegalStateException("Failed to copy tab state")
parcel.recycle()
result
}
}