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update paged component

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InsanusMokrassar
2025-03-08 07:59:27 +06:00
parent 6df8ad3095
commit 618f2dcd79
2 changed files with 64 additions and 24 deletions
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2
pagination/compose/src/commonMain/kotlin/InfinityPagedComponent.kt
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@@ -86,7 +86,7 @@ internal fun <T> InfinityPagedComponent(
val scope = predefinedScope ?: rememberCoroutineScope()
val context = remember { InfinityPagedComponentContext<T>(page, size, scope, loader) }
remember {
context.loadNext()
context.reload()
}
val dataState = context.dataState.collectAsState()

86
pagination/compose/src/commonMain/kotlin/PagedComponent.kt
View File

@@ -2,7 +2,12 @@ package dev.inmo.micro_utils.pagination.compose
import androidx.compose.runtime.*
import dev.inmo.micro_utils.coroutines.SpecialMutableStateFlow
import dev.inmo.micro_utils.coroutines.launchLoggingDropExceptions
import dev.inmo.micro_utils.pagination.*
import kotlinx.coroutines.CoroutineScope
import kotlinx.coroutines.Job
import kotlinx.coroutines.sync.Mutex
import kotlinx.coroutines.sync.withLock
/**
* Context for managing paginated data in a Compose UI.
@@ -18,39 +23,73 @@ import dev.inmo.micro_utils.pagination.*
*/
class PagedComponentContext<T> internal constructor(
initialPage: Int,
size: Int
size: Int,
private val scope: CoroutineScope,
private val loader: suspend PagedComponentContext<T>.(Pagination) -> PaginationResult<T>
) {
internal val startPage = SimplePagination(initialPage, size)
internal val currentlyLoadingPageState = SpecialMutableStateFlow<Pagination?>(startPage)
internal val latestLoadedPage = SpecialMutableStateFlow<PaginationResult<T>?>(null)
internal val dataState = SpecialMutableStateFlow<PaginationResult<T>?>(null)
internal var loadingJob: Job? = null
internal val loadingMutex = Mutex()
private fun initLoadingJob(
skipCheckerInLock: () -> Boolean,
pageGetter: () -> Pagination
): Job {
return scope.launchLoggingDropExceptions {
loadingMutex.withLock {
if (skipCheckerInLock()) return@launchLoggingDropExceptions
loadingJob = loadingJob ?: scope.launchLoggingDropExceptions {
runCatching {
loader(pageGetter())
}.onSuccess {
latestLoadedPage.value = it
dataState.value = it
}
loadingMutex.withLock {
loadingJob = null
}
}
loadingJob
} ?.join()
}
}
/**
* Loads the next page of data. If the last page is reached, this function returns early.
*/
fun loadNext() {
when {
currentlyLoadingPageState.value != null -> return
latestLoadedPage.value ?.isLastPage == true -> return
else -> currentlyLoadingPageState.value = (latestLoadedPage.value ?.nextPage()) ?: startPage
fun loadNext(): Job {
return initLoadingJob(
{ latestLoadedPage.value ?.isLastPage == true }
) {
latestLoadedPage.value ?.nextPage() ?: startPage
}
}
/**
* Loads the previous page of data if available.
*/
fun loadPrevious() {
when {
currentlyLoadingPageState.value != null -> return
latestLoadedPage.value ?.isFirstPage == true -> return
else -> currentlyLoadingPageState.value = (latestLoadedPage.value ?.previousPage()) ?: startPage
fun loadPrevious(): Job {
return initLoadingJob(
{ latestLoadedPage.value ?.isFirstPage == true }
) {
latestLoadedPage.value ?.previousPage() ?: startPage
}
}
/**
* Reloads the current page, refreshing the data.
*/
fun reload() {
currentlyLoadingPageState.value = latestLoadedPage.value
fun reload(): Job {
return initLoadingJob(
{
latestLoadedPage.value = null
true
}
) {
startPage
}
}
}
@@ -69,18 +108,16 @@ internal fun <T> PagedComponent(
initialPage: Int,
size: Int,
loader: suspend PagedComponentContext<T>.(Pagination) -> PaginationResult<T>,
predefinedScope: CoroutineScope? = null,
block: @Composable PagedComponentContext<T>.(PaginationResult<T>) -> Unit
) {
val context = remember { PagedComponentContext<T>(initialPage, size) }
val currentlyLoadingState = context.currentlyLoadingPageState.collectAsState()
LaunchedEffect(currentlyLoadingState.value) {
val paginationResult = loader(context, currentlyLoadingState.value ?: return@LaunchedEffect)
context.latestLoadedPage.value = paginationResult
context.currentlyLoadingPageState.value = null
val scope = predefinedScope ?: rememberCoroutineScope()
val context = remember { PagedComponentContext<T>(initialPage, size, scope, loader) }
remember {
context.reload()
}
val pageState = context.latestLoadedPage.collectAsState()
val pageState = context.dataState.collectAsState()
pageState.value ?.let {
context.block(it)
}
@@ -98,12 +135,14 @@ internal fun <T> PagedComponent(
fun <T> PagedComponent(
pageInfo: Pagination,
loader: suspend PagedComponentContext<T>.(Pagination) -> PaginationResult<T>,
predefinedScope: CoroutineScope? = null,
block: @Composable PagedComponentContext<T>.(PaginationResult<T>) -> Unit
) {
PagedComponent(
pageInfo.page,
pageInfo.size,
loader,
predefinedScope,
block
)
}
@@ -120,7 +159,8 @@ fun <T> PagedComponent(
fun <T> PagedComponent(
size: Int,
loader: suspend PagedComponentContext<T>.(Pagination) -> PaginationResult<T>,
predefinedScope: CoroutineScope? = null,
block: @Composable PagedComponentContext<T>.(PaginationResult<T>) -> Unit
) {
PagedComponent(0, size, loader, block)
PagedComponent(0, size, loader, predefinedScope, block)
}