Option to move manga source to top

app/src/main/kotlin/org/koitharu/kotatsu/core/db/MangaDatabase.kt

@@ -6,6 +6,7 @@ import androidx.room.InvalidationTracker
 import androidx.room.Room
 import androidx.room.RoomDatabase
 import androidx.room.migration.Migration
+import kotlinx.coroutines.CoroutineStart
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.isActive
 import kotlinx.coroutines.launch
@@ -118,7 +119,7 @@ fun MangaDatabase(context: Context): MangaDatabase = Room
 fun InvalidationTracker.removeObserverAsync(observer: InvalidationTracker.Observer) {
 	val scope = processLifecycleScope
 	if (scope.isActive) {
-		processLifecycleScope.launch(Dispatchers.Default) {
+		processLifecycleScope.launch(Dispatchers.Default, CoroutineStart.ATOMIC) {
 			removeObserver(observer)
 		}
 	}

app/src/main/kotlin/org/koitharu/kotatsu/core/db/Tables.kt

@@ -6,3 +6,4 @@ const val TABLE_TAGS = "tags"
 const val TABLE_FAVOURITE_CATEGORIES = "favourite_categories"
 const val TABLE_HISTORY = "history"
 const val TABLE_MANGA_TAGS = "manga_tags"
+const val TABLE_SOURCES = "sources"

app/src/main/kotlin/org/koitharu/kotatsu/core/db/entity/MangaSourceEntity.kt

@@ -3,9 +3,10 @@ package org.koitharu.kotatsu.core.db.entity
 import androidx.room.ColumnInfo
 import androidx.room.Entity
 import androidx.room.PrimaryKey
+import org.koitharu.kotatsu.core.db.TABLE_SOURCES
 
 @Entity(
-	tableName = "sources",
+	tableName = TABLE_SOURCES,
 )
 data class MangaSourceEntity(
 	@PrimaryKey(autoGenerate = false)

app/src/main/kotlin/org/koitharu/kotatsu/core/model/MangaSource.kt

@@ -1,5 +1,6 @@
 package org.koitharu.kotatsu.core.model
 
+import org.koitharu.kotatsu.parsers.model.ContentType
 import org.koitharu.kotatsu.parsers.model.MangaSource
 import org.koitharu.kotatsu.parsers.util.toTitleCase
 import java.util.Locale
@@ -15,3 +16,5 @@ fun MangaSource(name: String): MangaSource {
 	}
 	return MangaSource.DUMMY
 }
+
+fun MangaSource.isNsfw() = contentType == ContentType.HENTAI

app/src/main/kotlin/org/koitharu/kotatsu/settings/newsources/NewSourcesDialogFragment.kt

@@ -28,7 +28,10 @@ class NewSourcesDialogFragment :
 
 	private val viewModel by viewModels<NewSourcesViewModel>()
 
-	override fun onCreateViewBinding(inflater: LayoutInflater, container: ViewGroup?): DialogOnboardBinding {
+	override fun onCreateViewBinding(
+		inflater: LayoutInflater,
+		container: ViewGroup?,
+	): DialogOnboardBinding {
 		return DialogOnboardBinding.inflate(inflater, container, false)
 	}
 
@@ -54,6 +57,8 @@ class NewSourcesDialogFragment :
 
 	override fun onItemSettingsClick(item: SourceConfigItem.SourceItem) = Unit
 
+	override fun onItemLiftClick(item: SourceConfigItem.SourceItem) = Unit
+
 	override fun onItemEnabledChanged(item: SourceConfigItem.SourceItem, isEnabled: Boolean) {
 		viewModel.onItemEnabledChanged(item, isEnabled)
 	}

app/src/main/kotlin/org/koitharu/kotatsu/settings/onboard/OnboardDialogFragment.kt

@@ -4,7 +4,6 @@ import android.content.DialogInterface
 import android.os.Bundle
 import android.view.LayoutInflater
 import android.view.ViewGroup
-import androidx.core.view.isVisible
 import androidx.fragment.app.FragmentManager
 import androidx.fragment.app.viewModels
 import com.google.android.material.dialog.MaterialAlertDialogBuilder
@@ -13,7 +12,6 @@ import org.koitharu.kotatsu.R
 import org.koitharu.kotatsu.core.ui.AlertDialogFragment
 import org.koitharu.kotatsu.core.util.ext.observe
 import org.koitharu.kotatsu.core.util.ext.showAllowStateLoss
-import org.koitharu.kotatsu.core.util.ext.withArgs
 import org.koitharu.kotatsu.databinding.DialogOnboardBinding
 import org.koitharu.kotatsu.settings.onboard.adapter.SourceLocaleListener
 import org.koitharu.kotatsu.settings.onboard.adapter.SourceLocalesAdapter
@@ -25,14 +23,6 @@ class OnboardDialogFragment :
 	DialogInterface.OnClickListener, SourceLocaleListener {
 
 	private val viewModel by viewModels<OnboardViewModel>()
-	private var isWelcome: Boolean = false
-
-	override fun onCreate(savedInstanceState: Bundle?) {
-		super.onCreate(savedInstanceState)
-		arguments?.run {
-			isWelcome = getBoolean(ARG_WELCOME, false)
-		}
-	}
 
 	override fun onCreateViewBinding(
 		inflater: LayoutInflater,
@@ -43,11 +33,7 @@ class OnboardDialogFragment :
 		super.onBuildDialog(builder)
 			.setPositiveButton(R.string.done, this)
 			.setCancelable(false)
-		if (isWelcome) {
-			builder.setTitle(R.string.welcome)
-		} else {
-			builder.setTitle(R.string.remote_sources)
-		}
+		builder.setTitle(R.string.welcome)
 		return builder
 	}
 
@@ -55,11 +41,7 @@ class OnboardDialogFragment :
 		super.onViewBindingCreated(binding, savedInstanceState)
 		val adapter = SourceLocalesAdapter(this)
 		binding.recyclerView.adapter = adapter
-		if (isWelcome) {
-			binding.textViewTitle.setText(R.string.onboard_text)
-		} else {
-			binding.textViewTitle.isVisible = false
-		}
+		binding.textViewTitle.setText(R.string.onboard_text)
 		viewModel.list.observe(viewLifecycleOwner, adapter)
 	}
 
@@ -76,14 +58,7 @@ class OnboardDialogFragment :
 	companion object {
 
 		private const val TAG = "OnboardDialog"
-		private const val ARG_WELCOME = "welcome"
 
-		fun show(fm: FragmentManager) = OnboardDialogFragment().show(fm, TAG)
-
-		fun showWelcome(fm: FragmentManager) {
-			OnboardDialogFragment().withArgs(1) {
-				putBoolean(ARG_WELCOME, true)
-			}.showAllowStateLoss(fm, TAG)
-		}
+		fun show(fm: FragmentManager) = OnboardDialogFragment().showAllowStateLoss(fm, TAG)
 	}
 }

app/src/main/kotlin/org/koitharu/kotatsu/settings/sources/SourcesListProducer.kt

@@ -0,0 +1,186 @@
+package org.koitharu.kotatsu.settings.sources
+
+import androidx.core.os.LocaleListCompat
+import androidx.room.InvalidationTracker
+import dagger.hilt.android.ViewModelLifecycle
+import dagger.hilt.android.scopes.ViewModelScoped
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.cancelAndJoin
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.filter
+import kotlinx.coroutines.flow.flowOn
+import kotlinx.coroutines.flow.launchIn
+import kotlinx.coroutines.flow.onEach
+import kotlinx.coroutines.flow.update
+import kotlinx.coroutines.launch
+import org.koitharu.kotatsu.R
+import org.koitharu.kotatsu.core.db.TABLE_SOURCES
+import org.koitharu.kotatsu.core.model.getLocaleTitle
+import org.koitharu.kotatsu.core.model.isNsfw
+import org.koitharu.kotatsu.core.prefs.AppSettings
+import org.koitharu.kotatsu.core.util.AlphanumComparator
+import org.koitharu.kotatsu.core.util.ext.lifecycleScope
+import org.koitharu.kotatsu.core.util.ext.map
+import org.koitharu.kotatsu.core.util.ext.toEnumSet
+import org.koitharu.kotatsu.explore.data.MangaSourcesRepository
+import org.koitharu.kotatsu.parsers.model.MangaSource
+import org.koitharu.kotatsu.parsers.util.toTitleCase
+import org.koitharu.kotatsu.settings.sources.model.SourceConfigItem
+import java.util.Locale
+import java.util.TreeMap
+import javax.inject.Inject
+
+@ViewModelScoped
+class SourcesListProducer @Inject constructor(
+	lifecycle: ViewModelLifecycle,
+	private val repository: MangaSourcesRepository,
+	private val settings: AppSettings,
+) : InvalidationTracker.Observer(TABLE_SOURCES) {
+
+	private val scope = lifecycle.lifecycleScope
+	private var query: String = ""
+	private val expanded = HashSet<String?>()
+	val list = MutableStateFlow(emptyList<SourceConfigItem>())
+
+	private var job = scope.launch(Dispatchers.Default) {
+		list.value = buildList()
+	}
+
+	init {
+		settings.observe()
+			.filter { it == AppSettings.KEY_TIPS_CLOSED || it == AppSettings.KEY_DISABLE_NSFW }
+			.flowOn(Dispatchers.Default)
+			.onEach { onInvalidated(emptySet()) }
+			.launchIn(scope)
+	}
+
+	override fun onInvalidated(tables: Set<String>) {
+		val prevJob = job
+		job = scope.launch(Dispatchers.Default) {
+			prevJob.cancelAndJoin()
+			list.update { buildList() }
+		}
+	}
+
+	fun setQuery(value: String) {
+		this.query = value
+		onInvalidated(emptySet())
+	}
+
+	fun expandCollapse(group: String?) {
+		if (!expanded.remove(group)) {
+			expanded.add(group)
+		}
+		onInvalidated(emptySet())
+	}
+
+	private suspend fun buildList(): List<SourceConfigItem> {
+		val allSources = repository.allMangaSources
+		val enabledSources = repository.getEnabledSources()
+		val isNsfwDisabled = settings.isNsfwContentDisabled
+		val withTip = settings.isTipEnabled(TIP_REORDER)
+		val enabledSet = enabledSources.toEnumSet()
+		if (query.isNotEmpty()) {
+			return allSources.mapNotNull {
+				if (!it.title.contains(query, ignoreCase = true)) {
+					return@mapNotNull null
+				}
+				SourceConfigItem.SourceItem(
+					source = it,
+					summary = it.getLocaleTitle(),
+					isEnabled = it in enabledSet,
+					isDraggable = false,
+					isAvailable = !isNsfwDisabled || !it.isNsfw(),
+				)
+			}.ifEmpty {
+				listOf(SourceConfigItem.EmptySearchResult)
+			}
+		}
+		val map = allSources.groupByTo(TreeMap(LocaleKeyComparator())) {
+			if (it in enabledSet) {
+				KEY_ENABLED
+			} else {
+				it.locale
+			}
+		}
+		map.remove(KEY_ENABLED)
+		val result = ArrayList<SourceConfigItem>(allSources.size + map.size + 2)
+		if (enabledSources.isNotEmpty()) {
+			result += SourceConfigItem.Header(R.string.enabled_sources)
+			if (withTip) {
+				result += SourceConfigItem.Tip(
+					TIP_REORDER,
+					R.drawable.ic_tap_reorder,
+					R.string.sources_reorder_tip,
+				)
+			}
+			enabledSources.mapTo(result) {
+				SourceConfigItem.SourceItem(
+					source = it,
+					summary = it.getLocaleTitle(),
+					isEnabled = true,
+					isDraggable = true,
+					isAvailable = false,
+				)
+			}
+		}
+		if (enabledSources.size != allSources.size) {
+			result += SourceConfigItem.Header(R.string.available_sources)
+			val comparator = compareBy<MangaSource, String>(AlphanumComparator()) { it.name }
+			for ((key, list) in map) {
+				list.sortWith(comparator)
+				val isExpanded = key in expanded
+				result += SourceConfigItem.LocaleGroup(
+					localeId = key,
+					title = getLocaleTitle(key),
+					isExpanded = isExpanded,
+				)
+				if (isExpanded) {
+					list.mapTo(result) {
+						SourceConfigItem.SourceItem(
+							source = it,
+							summary = null,
+							isEnabled = false,
+							isDraggable = false,
+							isAvailable = !isNsfwDisabled || !it.isNsfw(),
+						)
+					}
+				}
+			}
+		}
+		return result
+	}
+
+	private class LocaleKeyComparator : Comparator<String?> {
+
+		private val deviceLocales = LocaleListCompat.getAdjustedDefault()
+			.map { it.language }
+
+		override fun compare(a: String?, b: String?): Int {
+			when {
+				a == b -> return 0
+				a == null -> return 1
+				b == null -> return -1
+			}
+			val ai = deviceLocales.indexOf(a!!)
+			val bi = deviceLocales.indexOf(b!!)
+			return when {
+				ai < 0 && bi < 0 -> a.compareTo(b)
+				ai < 0 -> 1
+				bi < 0 -> -1
+				else -> ai.compareTo(bi)
+			}
+		}
+	}
+
+	companion object {
+
+		private fun getLocaleTitle(localeKey: String?): String? {
+			val locale = Locale(localeKey ?: return null)
+			return locale.getDisplayLanguage(locale).toTitleCase(locale)
+		}
+
+		private const val KEY_ENABLED = "!"
+		const val TIP_REORDER = "src_reorder"
+	}
+}

app/src/main/kotlin/org/koitharu/kotatsu/settings/sources/SourcesManageFragment.kt

@@ -27,7 +27,6 @@ import org.koitharu.kotatsu.core.util.ext.observeEvent
 import org.koitharu.kotatsu.databinding.FragmentSettingsSourcesBinding
 import org.koitharu.kotatsu.main.ui.owners.AppBarOwner
 import org.koitharu.kotatsu.settings.SettingsActivity
-import org.koitharu.kotatsu.settings.onboard.OnboardDialogFragment
 import org.koitharu.kotatsu.settings.sources.adapter.SourceConfigAdapter
 import org.koitharu.kotatsu.settings.sources.adapter.SourceConfigListener
 import org.koitharu.kotatsu.settings.sources.model.SourceConfigItem
@@ -56,7 +55,10 @@ class SourcesManageFragment :
 		container: ViewGroup?,
 	) = FragmentSettingsSourcesBinding.inflate(inflater, container, false)
 
-	override fun onViewBindingCreated(binding: FragmentSettingsSourcesBinding, savedInstanceState: Bundle?) {
+	override fun onViewBindingCreated(
+		binding: FragmentSettingsSourcesBinding,
+		savedInstanceState: Bundle?,
+	) {
 		super.onViewBindingCreated(binding, savedInstanceState)
 		val sourcesAdapter = SourceConfigAdapter(this, coil, viewLifecycleOwner)
 		with(binding.recyclerView) {
@@ -67,7 +69,10 @@ class SourcesManageFragment :
 			}
 		}
 		viewModel.content.observe(viewLifecycleOwner, sourcesAdapter)
-		viewModel.onActionDone.observeEvent(viewLifecycleOwner, ReversibleActionObserver(binding.recyclerView))
+		viewModel.onActionDone.observeEvent(
+			viewLifecycleOwner,
+			ReversibleActionObserver(binding.recyclerView)
+		)
 		addMenuProvider(SourcesMenuProvider())
 	}
 
@@ -94,6 +99,10 @@ class SourcesManageFragment :
 		(activity as? SettingsActivity)?.openFragment(fragment, false)
 	}
 
+	override fun onItemLiftClick(item: SourceConfigItem.SourceItem) {
+		viewModel.bringToTop(item.source)
+	}
+
 	override fun onItemEnabledChanged(item: SourceConfigItem.SourceItem, isEnabled: Boolean) {
 		viewModel.setEnabled(item.source, isEnabled)
 	}
@@ -127,11 +136,6 @@ class SourcesManageFragment :
 				true
 			}
 
-			R.id.action_locales -> {
-				OnboardDialogFragment.show(childFragmentManager)
-				true
-			}
-
 			R.id.action_no_nsfw -> {
 				settings.isNsfwContentDisabled = !menuItem.isChecked
 				true
@@ -181,7 +185,7 @@ class SourcesManageFragment :
 			target: RecyclerView.ViewHolder,
 			toPos: Int,
 			x: Int,
-			y: Int
+			y: Int,
 		) {
 			super.onMoved(recyclerView, viewHolder, fromPos, target, toPos, x, y)
 			viewModel.reorderSources(fromPos, toPos)
@@ -196,7 +200,10 @@ class SourcesManageFragment :
 			target.bindingAdapterPosition,
 		)
 
-		override fun getDragDirs(recyclerView: RecyclerView, viewHolder: RecyclerView.ViewHolder): Int {
+		override fun getDragDirs(
+			recyclerView: RecyclerView,
+			viewHolder: RecyclerView.ViewHolder,
+		): Int {
 			val item = viewHolder.getItem(SourceConfigItem.SourceItem::class.java)
 			return if (item != null && item.isDraggable) {
 				super.getDragDirs(recyclerView, viewHolder)
@@ -205,7 +212,10 @@ class SourcesManageFragment :
 			}
 		}
 
-		override fun getSwipeDirs(recyclerView: RecyclerView, viewHolder: RecyclerView.ViewHolder): Int {
+		override fun getSwipeDirs(
+			recyclerView: RecyclerView,
+			viewHolder: RecyclerView.ViewHolder,
+		): Int {
 			val item = viewHolder.getItem(SourceConfigItem.Tip::class.java)
 			return if (item != null) {
 				super.getSwipeDirs(recyclerView, viewHolder)

app/src/main/kotlin/org/koitharu/kotatsu/settings/sources/SourcesManageViewModel.kt

@@ -1,88 +1,59 @@
 package org.koitharu.kotatsu.settings.sources
 
-import androidx.annotation.CheckResult
-import androidx.core.os.LocaleListCompat
 import dagger.hilt.android.lifecycle.HiltViewModel
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.Job
-import kotlinx.coroutines.flow.MutableStateFlow
-import kotlinx.coroutines.flow.collectLatest
-import kotlinx.coroutines.flow.combine
+import kotlinx.coroutines.cancelAndJoin
+import kotlinx.coroutines.delay
+import kotlinx.coroutines.yield
 import org.koitharu.kotatsu.R
-import org.koitharu.kotatsu.core.model.getLocaleTitle
+import org.koitharu.kotatsu.core.db.MangaDatabase
+import org.koitharu.kotatsu.core.db.removeObserverAsync
 import org.koitharu.kotatsu.core.prefs.AppSettings
-import org.koitharu.kotatsu.core.prefs.observeAsFlow
 import org.koitharu.kotatsu.core.ui.BaseViewModel
 import org.koitharu.kotatsu.core.ui.util.ReversibleAction
-import org.koitharu.kotatsu.core.util.AlphanumComparator
 import org.koitharu.kotatsu.core.util.ext.MutableEventFlow
 import org.koitharu.kotatsu.core.util.ext.call
-import org.koitharu.kotatsu.core.util.ext.map
-import org.koitharu.kotatsu.core.util.ext.toEnumSet
 import org.koitharu.kotatsu.explore.data.MangaSourcesRepository
-import org.koitharu.kotatsu.parsers.model.ContentType
 import org.koitharu.kotatsu.parsers.model.MangaSource
 import org.koitharu.kotatsu.parsers.util.move
-import org.koitharu.kotatsu.parsers.util.toTitleCase
 import org.koitharu.kotatsu.settings.sources.model.SourceConfigItem
-import java.util.Locale
-import java.util.TreeMap
 import javax.inject.Inject
 
-private const val KEY_ENABLED = "!"
-private const val TIP_REORDER = "src_reorder"
-
 @HiltViewModel
 class SourcesManageViewModel @Inject constructor(
+	private val database: MangaDatabase,
 	private val settings: AppSettings,
 	private val repository: MangaSourcesRepository,
+	private val listProducer: SourcesListProducer,
 ) : BaseViewModel() {
 
-	private val expandedGroups = MutableStateFlow(emptySet<String?>())
-	private var searchQuery = MutableStateFlow<String?>(null)
-	private var reorderJob: Job? = null
-	val content = MutableStateFlow<List<SourceConfigItem>>(emptyList())
+	val content = listProducer.list
 	val onActionDone = MutableEventFlow<ReversibleAction>()
+	private var commitJob: Job? = null
 
 	init {
 		launchJob(Dispatchers.Default) {
-			combine(
-				repository.observeEnabledSources(),
-				expandedGroups,
-				searchQuery,
-				observeTip(),
-				settings.observeAsFlow(AppSettings.KEY_DISABLE_NSFW) { isNsfwContentDisabled },
-			) { sources, groups, query, tip, noNsfw ->
-				buildList(sources, groups, query, tip, noNsfw)
-			}.collectLatest {
-				reorderJob?.join()
-				content.value = it
-			}
+			database.invalidationTracker.addObserver(listProducer)
 		}
 	}
 
+	override fun onCleared() {
+		super.onCleared()
+		database.invalidationTracker.removeObserverAsync(listProducer)
+	}
+
 	fun reorderSources(oldPos: Int, newPos: Int) {
 		val snapshot = content.value.toMutableList()
-		val prevJob = reorderJob
-		reorderJob = launchJob(Dispatchers.Default) {
-			if ((snapshot[oldPos] as? SourceConfigItem.SourceItem)?.isDraggable != true) {
-				return@launchJob
-			}
-			if ((snapshot[newPos] as? SourceConfigItem.SourceItem)?.isDraggable != true) {
-				return@launchJob
-			}
-			snapshot.move(oldPos, newPos)
-			content.value = snapshot
-			prevJob?.join()
-			val newSourcesList = snapshot.mapNotNull { x ->
-				if (x is SourceConfigItem.SourceItem && x.isDraggable) {
-					x.source
-				} else {
-					null
-				}
-			}
-			repository.setPositions(newSourcesList)
+		if ((snapshot[oldPos] as? SourceConfigItem.SourceItem)?.isDraggable != true) {
+			return
 		}
+		if ((snapshot[newPos] as? SourceConfigItem.SourceItem)?.isDraggable != true) {
+			return
+		}
+		snapshot.move(oldPos, newPos)
+		content.value = snapshot
+		commit(snapshot)
 	}
 
 	fun canReorder(oldPos: Int, newPos: Int): Boolean {
@@ -100,6 +71,32 @@ class SourcesManageViewModel @Inject constructor(
 		}
 	}
 
+	fun bringToTop(source: MangaSource) {
+		var oldPos = -1
+		var newPos = -1
+		val snapshot = content.value
+		for ((i, x) in snapshot.withIndex()) {
+			if (x !is SourceConfigItem.SourceItem) {
+				continue
+			}
+			if (newPos == -1) {
+				newPos = i
+			}
+			if (x.source == source) {
+				oldPos = i
+				break
+			}
+		}
+		@Suppress("KotlinConstantConditions")
+		if (oldPos != -1 && newPos != -1) {
+			reorderSources(oldPos, newPos)
+			val revert = ReversibleAction(R.string.moved_to_top) {
+				reorderSources(newPos, oldPos)
+			}
+			onActionDone.call(revert)
+		}
+	}
+
 	fun disableAll() {
 		launchJob(Dispatchers.Default) {
 			repository.disableAllSources()
@@ -107,16 +104,11 @@ class SourcesManageViewModel @Inject constructor(
 	}
 
 	fun expandOrCollapse(headerId: String?) {
-		val expanded = expandedGroups.value
-		expandedGroups.value = if (headerId in expanded) {
-			expanded - headerId
-		} else {
-			expanded + headerId
-		}
+		listProducer.expandCollapse(headerId)
 	}
 
 	fun performSearch(query: String?) {
-		searchQuery.value = query?.trim()
+		listProducer.setQuery(query?.trim().orEmpty())
 	}
 
 	fun onTipClosed(item: SourceConfigItem.Tip) {
@@ -125,113 +117,20 @@ class SourcesManageViewModel @Inject constructor(
 		}
 	}
 
-	@CheckResult
-	private fun buildList(
-		enabledSources: List<MangaSource>,
-		expanded: Set<String?>,
-		query: String?,
-		withTip: Boolean,
-		isNsfwDisabled: Boolean,
-	): List<SourceConfigItem> {
-		val allSources = repository.allMangaSources
-		val enabledSet = enabledSources.toEnumSet()
-		if (!query.isNullOrEmpty()) {
-			return allSources.mapNotNull {
-				if (!it.title.contains(query, ignoreCase = true)) {
-					return@mapNotNull null
-				}
-				SourceConfigItem.SourceItem(
-					source = it,
-					summary = it.getLocaleTitle(),
-					isEnabled = it in enabledSet,
-					isDraggable = false,
-					isAvailable = !isNsfwDisabled || !it.isNsfw(),
-				)
-			}.ifEmpty {
-				listOf(SourceConfigItem.EmptySearchResult)
-			}
-		}
-		val map = allSources.groupByTo(TreeMap(LocaleKeyComparator())) {
-			if (it in enabledSet) {
-				KEY_ENABLED
-			} else {
-				it.locale
-			}
-		}
-		map.remove(KEY_ENABLED)
-		val result = ArrayList<SourceConfigItem>(allSources.size + map.size + 2)
-		if (enabledSources.isNotEmpty()) {
-			result += SourceConfigItem.Header(R.string.enabled_sources)
-			if (withTip) {
-				result += SourceConfigItem.Tip(TIP_REORDER, R.drawable.ic_tap_reorder, R.string.sources_reorder_tip)
-			}
-			enabledSources.mapTo(result) {
-				SourceConfigItem.SourceItem(
-					source = it,
-					summary = it.getLocaleTitle(),
-					isEnabled = true,
-					isDraggable = true,
-					isAvailable = false,
-				)
-			}
-		}
-		if (enabledSources.size != allSources.size) {
-			result += SourceConfigItem.Header(R.string.available_sources)
-			val comparator = compareBy<MangaSource, String>(AlphanumComparator()) { it.name }
-			for ((key, list) in map) {
-				list.sortWith(comparator)
-				val isExpanded = key in expanded
-				result += SourceConfigItem.LocaleGroup(
-					localeId = key,
-					title = getLocaleTitle(key),
-					isExpanded = isExpanded,
-				)
-				if (isExpanded) {
-					list.mapTo(result) {
-						SourceConfigItem.SourceItem(
-							source = it,
-							summary = null,
-							isEnabled = false,
-							isDraggable = false,
-							isAvailable = !isNsfwDisabled || !it.isNsfw(),
-						)
-					}
+	private fun commit(snapshot: List<SourceConfigItem>) {
+		val prevJob = commitJob
+		commitJob = launchJob {
+			prevJob?.cancelAndJoin()
+			delay(500)
+			val newSourcesList = snapshot.mapNotNull { x ->
+				if (x is SourceConfigItem.SourceItem && x.isDraggable) {
+					x.source
+				} else {
+					null
 				}
 			}
-		}
-		return result
-	}
-
-	private fun getLocaleTitle(localeKey: String?): String? {
-		val locale = Locale(localeKey ?: return null)
-		return locale.getDisplayLanguage(locale).toTitleCase(locale)
-	}
-
-	private fun observeTip() = settings.observeAsFlow(AppSettings.KEY_TIPS_CLOSED) {
-		isTipEnabled(TIP_REORDER)
-	}
-
-	private fun MangaSource.isNsfw() = contentType == ContentType.HENTAI
-
-	private class LocaleKeyComparator : Comparator<String?> {
-
-		private val deviceLocales = LocaleListCompat.getAdjustedDefault()
-			.map { it.language }
-
-		override fun compare(a: String?, b: String?): Int {
-			when {
-				a == b -> return 0
-				a == null -> return 1
-				b == null -> return -1
-			}
-			val ai = deviceLocales.indexOf(a!!)
-			val bi = deviceLocales.indexOf(b!!)
-			return when {
-				ai < 0 && bi < 0 -> a.compareTo(b)
-				ai < 0 -> 1
-				bi < 0 -> -1
-				else -> ai.compareTo(bi)
-			}
+			repository.setPositions(newSourcesList)
+			yield()
 		}
 	}
 }

app/src/main/kotlin/org/koitharu/kotatsu/settings/sources/adapter/SourceConfigAdapterDelegates.kt

@@ -7,6 +7,7 @@ import android.text.style.ForegroundColorSpan
 import android.text.style.RelativeSizeSpan
 import android.text.style.SuperscriptSpan
 import android.view.View
+import androidx.appcompat.widget.PopupMenu
 import androidx.core.text.buildSpannedString
 import androidx.core.text.inSpans
 import androidx.core.view.isGone
@@ -34,7 +35,13 @@ import org.koitharu.kotatsu.settings.sources.model.SourceConfigItem
 
 fun sourceConfigHeaderDelegate() =
 	adapterDelegateViewBinding<SourceConfigItem.Header, SourceConfigItem, ItemFilterHeaderBinding>(
-		{ layoutInflater, parent -> ItemFilterHeaderBinding.inflate(layoutInflater, parent, false) },
+		{ layoutInflater, parent ->
+			ItemFilterHeaderBinding.inflate(
+				layoutInflater,
+				parent,
+				false
+			)
+		},
 	) {
 
 		bind {
@@ -44,104 +51,121 @@ fun sourceConfigHeaderDelegate() =
 
 fun sourceConfigGroupDelegate(
 	listener: SourceConfigListener,
-) = adapterDelegateViewBinding<SourceConfigItem.LocaleGroup, SourceConfigItem, ItemExpandableBinding>(
-	{ layoutInflater, parent -> ItemExpandableBinding.inflate(layoutInflater, parent, false) },
-) {
+) =
+	adapterDelegateViewBinding<SourceConfigItem.LocaleGroup, SourceConfigItem, ItemExpandableBinding>(
+		{ layoutInflater, parent -> ItemExpandableBinding.inflate(layoutInflater, parent, false) },
+	) {
 
-	binding.root.setOnClickListener {
-		listener.onHeaderClick(item)
-	}
+		binding.root.setOnClickListener {
+			listener.onHeaderClick(item)
+		}
 
-	bind {
-		binding.root.text = item.title ?: getString(R.string.various_languages)
-		binding.root.isChecked = item.isExpanded
+		bind {
+			binding.root.text = item.title ?: getString(R.string.various_languages)
+			binding.root.isChecked = item.isExpanded
+		}
 	}
-}
 
 fun sourceConfigItemCheckableDelegate(
 	listener: SourceConfigListener,
 	coil: ImageLoader,
 	lifecycleOwner: LifecycleOwner,
-) = adapterDelegateViewBinding<SourceConfigItem.SourceItem, SourceConfigItem, ItemSourceConfigCheckableBinding>(
-	{ layoutInflater, parent -> ItemSourceConfigCheckableBinding.inflate(layoutInflater, parent, false) },
-) {
+) =
+	adapterDelegateViewBinding<SourceConfigItem.SourceItem, SourceConfigItem, ItemSourceConfigCheckableBinding>(
+		{ layoutInflater, parent ->
+			ItemSourceConfigCheckableBinding.inflate(
+				layoutInflater,
+				parent,
+				false
+			)
+		},
+	) {
 
-	binding.switchToggle.setOnCheckedChangeListener { _, isChecked ->
-		listener.onItemEnabledChanged(item, isChecked)
-	}
+		binding.switchToggle.setOnCheckedChangeListener { _, isChecked ->
+			listener.onItemEnabledChanged(item, isChecked)
+		}
 
-	bind {
-		binding.textViewTitle.text = if (item.isNsfw) {
-			buildSpannedString {
-				append(item.source.title)
-				append(' ')
-				appendNsfwLabel(context)
+		bind {
+			binding.textViewTitle.text = if (item.isNsfw) {
+				buildSpannedString {
+					append(item.source.title)
+					append(' ')
+					appendNsfwLabel(context)
+				}
+			} else {
+				item.source.title
+			}
+			binding.switchToggle.isChecked = item.isEnabled
+			binding.switchToggle.isEnabled = item.isAvailable
+			binding.textViewDescription.textAndVisible = item.summary
+			val fallbackIcon =
+				FaviconDrawable(context, R.style.FaviconDrawable_Small, item.source.name)
+			binding.imageViewIcon.newImageRequest(lifecycleOwner, item.source.faviconUri())?.run {
+				crossfade(context)
+				error(fallbackIcon)
+				placeholder(fallbackIcon)
+				fallback(fallbackIcon)
+				source(item.source)
+				enqueueWith(coil)
 			}
-		} else {
-			item.source.title
-		}
-		binding.switchToggle.isChecked = item.isEnabled
-		binding.switchToggle.isEnabled = item.isAvailable
-		binding.textViewDescription.textAndVisible = item.summary
-		val fallbackIcon = FaviconDrawable(context, R.style.FaviconDrawable_Small, item.source.name)
-		binding.imageViewIcon.newImageRequest(lifecycleOwner, item.source.faviconUri())?.run {
-			crossfade(context)
-			error(fallbackIcon)
-			placeholder(fallbackIcon)
-			fallback(fallbackIcon)
-			source(item.source)
-			enqueueWith(coil)
 		}
 	}
-}
 
 fun sourceConfigItemDelegate2(
 	listener: SourceConfigListener,
 	coil: ImageLoader,
 	lifecycleOwner: LifecycleOwner,
-) = adapterDelegateViewBinding<SourceConfigItem.SourceItem, SourceConfigItem, ItemSourceConfigBinding>(
-	{ layoutInflater, parent -> ItemSourceConfigBinding.inflate(layoutInflater, parent, false) },
-) {
+) =
+	adapterDelegateViewBinding<SourceConfigItem.SourceItem, SourceConfigItem, ItemSourceConfigBinding>(
+		{ layoutInflater, parent ->
+			ItemSourceConfigBinding.inflate(
+				layoutInflater,
+				parent,
+				false
+			)
+		},
+	) {
 
-	val eventListener = View.OnClickListener { v ->
-		when (v.id) {
-			R.id.imageView_add -> listener.onItemEnabledChanged(item, true)
-			R.id.imageView_remove -> listener.onItemEnabledChanged(item, false)
-			R.id.imageView_config -> listener.onItemSettingsClick(item)
-		}
-	}
-	binding.imageViewRemove.setOnClickListener(eventListener)
-	binding.imageViewAdd.setOnClickListener(eventListener)
-	binding.imageViewConfig.setOnClickListener(eventListener)
-
-	bind {
-		binding.textViewTitle.text = if (item.isNsfw) {
-			buildSpannedString {
-				append(item.source.title)
-				append(' ')
-				appendNsfwLabel(context)
+		val eventListener = View.OnClickListener { v ->
+			when (v.id) {
+				R.id.imageView_add -> listener.onItemEnabledChanged(item, true)
+				R.id.imageView_remove -> listener.onItemEnabledChanged(item, false)
+				R.id.imageView_menu -> showSourceMenu(v, item, listener)
 			}
-		} else {
-			item.source.title
 		}
-		binding.imageViewAdd.isGone = item.isEnabled || !item.isAvailable
-		binding.imageViewRemove.isVisible = item.isEnabled
-		binding.imageViewConfig.isVisible = item.isEnabled
-		binding.textViewDescription.textAndVisible = item.summary
-		val fallbackIcon = FaviconDrawable(context, R.style.FaviconDrawable_Small, item.source.name)
-		binding.imageViewIcon.newImageRequest(lifecycleOwner, item.source.faviconUri())?.run {
-			crossfade(context)
-			error(fallbackIcon)
-			placeholder(fallbackIcon)
-			fallback(fallbackIcon)
-			source(item.source)
-			enqueueWith(coil)
+		binding.imageViewRemove.setOnClickListener(eventListener)
+		binding.imageViewAdd.setOnClickListener(eventListener)
+		binding.imageViewMenu.setOnClickListener(eventListener)
+
+		bind {
+			binding.textViewTitle.text = if (item.isNsfw) {
+				buildSpannedString {
+					append(item.source.title)
+					append(' ')
+					appendNsfwLabel(context)
+				}
+			} else {
+				item.source.title
+			}
+			binding.imageViewAdd.isGone = item.isEnabled || !item.isAvailable
+			binding.imageViewRemove.isVisible = item.isEnabled
+			binding.imageViewMenu.isVisible = item.isEnabled
+			binding.textViewDescription.textAndVisible = item.summary
+			val fallbackIcon =
+				FaviconDrawable(context, R.style.FaviconDrawable_Small, item.source.name)
+			binding.imageViewIcon.newImageRequest(lifecycleOwner, item.source.faviconUri())?.run {
+				crossfade(context)
+				error(fallbackIcon)
+				placeholder(fallbackIcon)
+				fallback(fallbackIcon)
+				source(item.source)
+				enqueueWith(coil)
+			}
 		}
 	}
-}
 
 fun sourceConfigTipDelegate(
-	listener: OnTipCloseListener<SourceConfigItem.Tip>
+	listener: OnTipCloseListener<SourceConfigItem.Tip>,
 ) = adapterDelegateViewBinding<SourceConfigItem.Tip, SourceConfigItem, ItemTipBinding>(
 	{ layoutInflater, parent -> ItemTipBinding.inflate(layoutInflater, parent, false) },
 ) {
@@ -156,14 +180,37 @@ fun sourceConfigTipDelegate(
 	}
 }
 
-fun sourceConfigEmptySearchDelegate() = adapterDelegate<SourceConfigItem.EmptySearchResult, SourceConfigItem>(
-	R.layout.item_sources_empty,
-) { }
+fun sourceConfigEmptySearchDelegate() =
+	adapterDelegate<SourceConfigItem.EmptySearchResult, SourceConfigItem>(
+		R.layout.item_sources_empty,
+	) { }
 
 fun SpannableStringBuilder.appendNsfwLabel(context: Context) = inSpans(
-	ForegroundColorSpan(context.getThemeColor(com.google.android.material.R.attr.colorError, Color.RED)),
+	ForegroundColorSpan(
+		context.getThemeColor(
+			com.google.android.material.R.attr.colorError,
+			Color.RED
+		)
+	),
 	RelativeSizeSpan(0.74f),
 	SuperscriptSpan(),
 ) {
 	append(context.getString(R.string.nsfw))
 }
+
+private fun showSourceMenu(
+	anchor: View,
+	item: SourceConfigItem.SourceItem,
+	listener: SourceConfigListener,
+) {
+	val menu = PopupMenu(anchor.context, anchor)
+	menu.inflate(R.menu.popup_source_config)
+	menu.setOnMenuItemClickListener {
+		when (it.itemId) {
+			R.id.action_settings -> listener.onItemSettingsClick(item)
+			R.id.action_lift -> listener.onItemLiftClick(item)
+		}
+		true
+	}
+	menu.show()
+}

app/src/main/kotlin/org/koitharu/kotatsu/settings/sources/adapter/SourceConfigListener.kt

@@ -7,6 +7,8 @@ interface SourceConfigListener : OnTipCloseListener<SourceConfigItem.Tip> {
 
 	fun onItemSettingsClick(item: SourceConfigItem.SourceItem)
 
+	fun onItemLiftClick(item: SourceConfigItem.SourceItem)
+
 	fun onItemEnabledChanged(item: SourceConfigItem.SourceItem, isEnabled: Boolean)
 
 	fun onHeaderClick(header: SourceConfigItem.LocaleGroup)

app/src/main/kotlin/org/koitharu/kotatsu/settings/sources/model/SourceConfigItem.kt

@@ -72,11 +72,7 @@ sealed interface SourceConfigItem : ListModel {
 		}
 	}
 
-	object EmptySearchResult : SourceConfigItem {
-
-		override fun equals(other: Any?): Boolean {
-			return other === EmptySearchResult
-		}
+	data object EmptySearchResult : SourceConfigItem {
 
 		override fun areItemsTheSame(other: ListModel): Boolean {
 			return other is EmptySearchResult

app/src/main/res/layout/item_source_config.xml

@@ -52,14 +52,15 @@
 	</LinearLayout>
 
 	<ImageView
-		android:id="@+id/imageView_config"
+		android:id="@+id/imageView_menu"
 		android:layout_width="wrap_content"
 		android:layout_height="wrap_content"
 		android:background="?selectableItemBackgroundBorderless"
-		android:contentDescription="@string/settings"
+		android:contentDescription="@string/more"
 		android:padding="@dimen/margin_small"
 		android:scaleType="center"
-		android:src="@drawable/ic_settings" />
+		android:src="@drawable/abc_ic_menu_overflow_material"
+		app:tint="?colorControlNormal" />
 
 	<ImageView
 		android:id="@+id/imageView_add"

app/src/main/res/menu/opt_sources.xml

@@ -16,11 +16,6 @@
 		android:title="@string/disable_nsfw"
 		app:showAsAction="never" />
 
-	<item
-		android:id="@+id/action_locales"
-		android:title="@string/languages"
-		app:showAsAction="never" />
-
 	<item
 		android:id="@+id/action_disable_all"
 		android:title="@string/disable_all"

app/src/main/res/menu/popup_source_config.xml

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?>
+<menu
+	xmlns:android="http://schemas.android.com/apk/res/android">
+
+	<item
+		android:id="@+id/action_lift"
+		android:title="@string/to_top" />
+
+	<item
+		android:id="@+id/action_settings"
+		android:title="@string/settings" />
+
+</menu>

app/src/main/res/values/strings.xml

@@ -483,4 +483,6 @@
 	<string name="directories">Directories</string>
 	<string name="main_screen_sections">Main screen sections</string>
 	<string name="items_limit_exceeded">No more items can be added</string>
+	<string name="to_top">To top</string>
+	<string name="moved_to_top">Moved to top</string>
 </resources>