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update left items

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InsanusMokrassar
2020-11-23 00:36:37 +06:00
parent e7a0fa4e8f
commit 629884a396
2 changed files with 11 additions and 3 deletions
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12
android/recyclerview/src/main/kotlin/dev/inmo/micro_utils/android/recyclerview/LeftItems.kt
View File

@@ -1,14 +1,20 @@
package dev.inmo.micro_utils.android.recyclerview
import androidx.recyclerview.widget.LinearLayoutManager
import androidx.recyclerview.widget.RecyclerView
import androidx.recyclerview.widget.*
import kotlinx.coroutines.CoroutineScope
import kotlinx.coroutines.flow.*
@Suppress("NOTHING_TO_INLINE")
private inline fun RecyclerView.LayoutManager.findLastVisibleItemPositionGetter(): (() -> Int)? = when (this) {
is LinearLayoutManager -> ::findLastVisibleItemPosition
is GridLayoutManager -> ::findLastVisibleItemPosition
else -> null
}
fun RecyclerView.lastVisibleItemFlow(
completingScope: CoroutineScope
): Flow<Int> {
val lastVisibleElementFun: () -> Int = (layoutManager as? LinearLayoutManager) ?.let { it::findLastVisibleItemPosition } ?: error("Currently supported only linear layout manager")
val lastVisibleElementFun: () -> Int = layoutManager ?.findLastVisibleItemPositionGetter() ?: error("Currently supported only linear layout manager")
val lastVisibleFlow = MutableStateFlow(lastVisibleElementFun())
addOnScrollListener(
object : RecyclerView.OnScrollListener() {