Fix details read/continue state

app/src/main/kotlin/org/koitharu/kotatsu/details/ui/DetailsActivity.kt

@@ -585,8 +585,7 @@ class DetailsActivity :
 
 	private fun openReader(isIncognitoMode: Boolean) {
 		val manga = viewModel.manga.value ?: return
-		val chapterId = viewModel.historyInfo.value.history?.chapterId
-		if (chapterId != null && manga.chapters?.none { x -> x.id == chapterId } == true) {
+		if (viewModel.historyInfo.value.isChapterMissing) {
 			Snackbar.make(viewBinding.scrollView, R.string.chapter_is_missing, Snackbar.LENGTH_SHORT)
 				.show()
 		} else {

app/src/main/kotlin/org/koitharu/kotatsu/details/ui/adapter/ChaptersAdapter.kt

@@ -1,25 +1,39 @@
 package org.koitharu.kotatsu.details.ui.adapter
 
 import android.content.Context
+import org.koitharu.kotatsu.core.model.formatNumber
 import org.koitharu.kotatsu.core.ui.BaseListAdapter
 import org.koitharu.kotatsu.core.ui.list.OnListItemClickListener
 import org.koitharu.kotatsu.core.ui.list.fastscroll.FastScroller
 import org.koitharu.kotatsu.details.ui.model.ChapterListItem
 import org.koitharu.kotatsu.list.ui.adapter.ListItemType
 import org.koitharu.kotatsu.list.ui.adapter.listHeaderAD
+import org.koitharu.kotatsu.list.ui.model.ListHeader
 import org.koitharu.kotatsu.list.ui.model.ListModel
 
 class ChaptersAdapter(
 	private val onItemClickListener: OnListItemClickListener<ChapterListItem>,
 ) : BaseListAdapter<ListModel>(), FastScroller.SectionIndexer {
 
+	private var hasVolumes = false
+
 	init {
 		addDelegate(ListItemType.HEADER, listHeaderAD(null))
 		addDelegate(ListItemType.CHAPTER_LIST, chapterListItemAD(onItemClickListener))
 		addDelegate(ListItemType.CHAPTER_GRID, chapterGridItemAD(onItemClickListener))
 	}
 
+	override suspend fun emit(value: List<ListModel>?) {
+		super.emit(value)
+		hasVolumes = value != null && value.any { it is ListHeader }
+	}
+
 	override fun getSectionText(context: Context, position: Int): CharSequence? {
-		return findHeader(position)?.getText(context)
+		return if (hasVolumes) {
+			findHeader(position)?.getText(context)
+		} else {
+			val chapter = (items.getOrNull(position) as? ChapterListItem)?.chapter ?: return null
+			if (chapter.number > 0) chapter.formatNumber() else null
+		}
 	}
 }

app/src/main/kotlin/org/koitharu/kotatsu/details/ui/model/HistoryInfo.kt

@@ -1,10 +1,7 @@
 package org.koitharu.kotatsu.details.ui.model
 
 import org.koitharu.kotatsu.core.model.MangaHistory
-import org.koitharu.kotatsu.core.model.MangaSource
-import org.koitharu.kotatsu.core.model.isLocal
 import org.koitharu.kotatsu.details.data.MangaDetails
-import org.koitharu.kotatsu.parsers.model.Manga
 
 data class HistoryInfo(
 	val totalChapters: Int,
@@ -17,8 +14,8 @@ data class HistoryInfo(
 	val isValid: Boolean
 		get() = totalChapters >= 0
 
-	val canContinue: Boolean
-		get() = history != null && !isChapterMissing
+	val canContinue
+		get() = currentChapter >= 0
 }
 
 fun HistoryInfo(
@@ -38,7 +35,7 @@ fun HistoryInfo(
 		currentChapter = currentChapter,
 		history = history,
 		isIncognitoMode = isIncognitoMode,
-		isChapterMissing = currentChapter == -1,
+		isChapterMissing = history != null && manga?.isLoaded == true && manga.allChapters.none { it.id == history.chapterId },
 		canDownload = manga?.isLocal == false,
 	)
 }