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Retain previous selected state when updating list states

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Fixes #8417
This commit is contained in:
arkon
2022-11-13 22:27:59 -05:00
parent b1ccebf329
commit 10e349f76e
7 changed files with 79 additions and 56 deletions
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app/src/main/java/eu/kanade/tachiyomi/ui/manga/MangaScreenModel.kt
+31 -23
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@@ -8,6 +8,7 @@ import cafe.adriel.voyager.core.model.StateScreenModel
import cafe.adriel.voyager.core.model.coroutineScope
import eu.kanade.core.prefs.CheckboxState
import eu.kanade.core.prefs.mapAsCheckboxState
import eu.kanade.core.util.addOrRemove
import eu.kanade.data.chapter.NoChaptersException
import eu.kanade.domain.base.BasePreferences
import eu.kanade.domain.category.interactor.GetCategories
@@ -84,6 +85,7 @@ class MangaInfoScreenModel(
basePreferences: BasePreferences = Injekt.get(),
private val downloadPreferences: DownloadPreferences = Injekt.get(),
private val libraryPreferences: LibraryPreferences = Injekt.get(),
private val uiPreferences: UiPreferences = Injekt.get(),
private val trackManager: TrackManager = Injekt.get(),
private val sourceManager: SourceManager = Injekt.get(),
private val downloadManager: DownloadManager = Injekt.get(),
@@ -120,6 +122,7 @@ class MangaInfoScreenModel(
get() = successState?.processedChapters
private val selectedPositions: Array<Int> = arrayOf(-1, -1) // first and last selected index in list
private val selectedChapterIds: HashSet<Long> = HashSet()
/**
* Helper function to update the UI state only if it's currently in success state
@@ -141,7 +144,6 @@ class MangaInfoScreenModel(
init {
val toChapterItemsParams: List<Chapter>.(manga: Manga) -> List<ChapterItem> = { manga ->
val uiPreferences = Injekt.get<UiPreferences>()
toChapterItems(
context = context,
manga = manga,
@@ -529,6 +531,7 @@ class MangaInfoScreenModel(
it + 1,
)
},
selected = chapter.id in selectedChapterIds,
)
}
}
@@ -832,51 +835,54 @@ class MangaInfoScreenModel(
) {
updateSuccessState { successState ->
val newChapters = successState.processedChapters.toMutableList().apply {
val modifiedIndex = successState.processedChapters.indexOfFirst { it == item }
if (modifiedIndex < 0) return@apply
val selectedIndex = successState.processedChapters.indexOfFirst { it.chapter.id == item.chapter.id }
if (selectedIndex < 0) return@apply
val oldItem = get(modifiedIndex)
if ((oldItem.selected && selected) || (!oldItem.selected && !selected)) return@apply
val selectedItem = get(selectedIndex)
if ((selectedItem.selected && selected) || (!selectedItem.selected && !selected)) return@apply
val firstSelection = none { it.selected }
var newItem = removeAt(modifiedIndex)
add(modifiedIndex, newItem.copy(selected = selected))
set(selectedIndex, selectedItem.copy(selected = selected))
selectedChapterIds.addOrRemove(item.chapter.id, selected)
if (selected && userSelected && fromLongPress) {
if (firstSelection) {
selectedPositions[0] = modifiedIndex
selectedPositions[1] = modifiedIndex
selectedPositions[0] = selectedIndex
selectedPositions[1] = selectedIndex
} else {
// Try to select the items in-between when possible
val range: IntRange
if (modifiedIndex < selectedPositions[0]) {
range = modifiedIndex + 1 until selectedPositions[0]
selectedPositions[0] = modifiedIndex
} else if (modifiedIndex > selectedPositions[1]) {
range = (selectedPositions[1] + 1) until modifiedIndex
selectedPositions[1] = modifiedIndex
if (selectedIndex < selectedPositions[0]) {
range = selectedIndex + 1 until selectedPositions[0]
selectedPositions[0] = selectedIndex
} else if (selectedIndex > selectedPositions[1]) {
range = (selectedPositions[1] + 1) until selectedIndex
selectedPositions[1] = selectedIndex
} else {
// Just select itself
range = IntRange.EMPTY
}
range.forEach {
newItem = removeAt(it)
add(it, newItem.copy(selected = true))
val inbetweenItem = get(it)
if (!inbetweenItem.selected) {
selectedChapterIds.add(inbetweenItem.chapter.id)
set(it, inbetweenItem.copy(selected = true))
}
}
}
} else if (userSelected && !fromLongPress) {
if (!selected) {
if (modifiedIndex == selectedPositions[0]) {
if (selectedIndex == selectedPositions[0]) {
selectedPositions[0] = indexOfFirst { it.selected }
} else if (modifiedIndex == selectedPositions[1]) {
} else if (selectedIndex == selectedPositions[1]) {
selectedPositions[1] = indexOfLast { it.selected }
}
} else {
if (modifiedIndex < selectedPositions[0]) {
selectedPositions[0] = modifiedIndex
} else if (modifiedIndex > selectedPositions[1]) {
selectedPositions[1] = modifiedIndex
if (selectedIndex < selectedPositions[0]) {
selectedPositions[0] = selectedIndex
} else if (selectedIndex > selectedPositions[1]) {
selectedPositions[1] = selectedIndex
}
}
}
@@ -888,6 +894,7 @@ class MangaInfoScreenModel(
fun toggleAllSelection(selected: Boolean) {
updateSuccessState { successState ->
val newChapters = successState.chapters.map {
selectedChapterIds.addOrRemove(it.chapter.id, selected)
it.copy(selected = selected)
}
selectedPositions[0] = -1
@@ -899,6 +906,7 @@ class MangaInfoScreenModel(
fun invertSelection() {
updateSuccessState { successState ->
val newChapters = successState.chapters.map {
selectedChapterIds.addOrRemove(it.chapter.id, !it.selected)
it.copy(selected = !it.selected)
}
selectedPositions[0] = -1