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Correct copying of `viewControllerState` property has provided

This commit is contained in:
Daniil Borisovskii 2019-10-12 19:25:29 +03:00
parent 6d7ebc5de8
commit 705f4e9e39
1 changed files with 18 additions and 8 deletions
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26
tabbar-navigation/src/main/java/ru/touchin/roboswag/components/tabbarnavigation/BottomNavigationFragment.kt
View File

@ -1,6 +1,7 @@
package ru.touchin.roboswag.components.tabbarnavigation
import android.os.Bundle
import android.os.Parcel
import android.os.Parcelable
import android.util.SparseArray
import android.view.LayoutInflater
@ -83,14 +84,13 @@ abstract class BottomNavigationFragment : Fragment() {
) {
/**
* It is value as class body field with lazy delegate instead of value as constructor parameter
* to specify custom getter of this field which returns new instance of Parcelable every time it be invoked.
* 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: Parcelable by lazy {
viewControllerState
}
* 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
@ -98,6 +98,16 @@ abstract class BottomNavigationFragment : Fragment() {
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
}
}
}