Merge branch 'devel' into feature/mal

.gitignore

@@ -12,6 +12,7 @@
 /.idea/navEditor.xml
 /.idea/assetWizardSettings.xml
 /.idea/kotlinScripting.xml
+/.idea/kotlinc.xml
 /.idea/deploymentTargetDropDown.xml
 /.idea/androidTestResultsUserPreferences.xml
 /.idea/render.experimental.xml

.idea/kotlinc.xml

@@ -1,9 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="Kotlin2JvmCompilerArguments">
-    <option name="jvmTarget" value="1.8" />
-  </component>
-  <component name="KotlinJpsPluginSettings">
-    <option name="version" value="1.8.0" />
-  </component>
-</project>

app/build.gradle

@@ -90,7 +90,7 @@ dependencies {
 		exclude group: 'org.json', module: 'json'
 	}
 
-	implementation 'org.jetbrains.kotlin:kotlin-stdlib:1.8.0'
+	implementation 'org.jetbrains.kotlin:kotlin-stdlib:1.8.10'
 	implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-android:1.6.4'
 
 	implementation "androidx.appcompat:appcompat:1.6.0"

app/src/main/java/org/koitharu/kotatsu/base/ui/util/SpanSizeResolver.kt

@@ -0,0 +1,55 @@
+package org.koitharu.kotatsu.base.ui.util
+
+import android.view.View
+import androidx.annotation.Px
+import androidx.recyclerview.widget.GridLayoutManager
+import androidx.recyclerview.widget.RecyclerView
+import org.koitharu.kotatsu.parsers.util.toIntUp
+import kotlin.math.abs
+
+class SpanSizeResolver(
+	private val recyclerView: RecyclerView,
+	@Px private val minItemWidth: Int,
+) : View.OnLayoutChangeListener {
+
+	fun attach() {
+		recyclerView.addOnLayoutChangeListener(this)
+	}
+
+	fun detach() {
+		recyclerView.removeOnLayoutChangeListener(this)
+	}
+
+	override fun onLayoutChange(
+		v: View?,
+		left: Int,
+		top: Int,
+		right: Int,
+		bottom: Int,
+		oldLeft: Int,
+		oldTop: Int,
+		oldRight: Int,
+		oldBottom: Int,
+	) {
+		invalidateInternal(abs(right - left))
+	}
+
+	fun invalidate() {
+		invalidateInternal(recyclerView.width)
+	}
+
+	private fun invalidateInternal(width: Int) {
+		if (width <= 0) {
+			return
+		}
+		val lm = recyclerView.layoutManager as? GridLayoutManager ?: return
+		val estimatedCount = (width / minItemWidth.toFloat()).toIntUp()
+		if (lm.spanCount != estimatedCount) {
+			lm.spanCount = estimatedCount
+			lm.spanSizeLookup?.run {
+				invalidateSpanGroupIndexCache()
+				invalidateSpanIndexCache()
+			}
+		}
+	}
+}

app/src/main/java/org/koitharu/kotatsu/core/prefs/AppSettings.kt

@@ -205,6 +205,10 @@ class AppSettings @Inject constructor(@ApplicationContext context: Context) {
 		sourcesOrder = (sourcesOrder + sources.map { it.name }).distinct()
 	}
 
+	var isSourcesGridMode: Boolean
+		get() = prefs.getBoolean(KEY_SOURCES_GRID, false)
+		set(value) = prefs.edit { putBoolean(KEY_SOURCES_GRID, value) }
+
 	val isPagesNumbersEnabled: Boolean
 		get() = prefs.getBoolean(KEY_PAGES_NUMBERS, false)
 
@@ -377,6 +381,7 @@ class AppSettings @Inject constructor(@ApplicationContext context: Context) {
 		const val KEY_APP_LOCALE = "app_locale"
 		const val KEY_LOGGING_ENABLED = "logging"
 		const val KEY_LOGS_SHARE = "logs_share"
+		const val KEY_SOURCES_GRID = "sources_grid"
 
 		// About
 		const val KEY_APP_UPDATE = "app_update"

app/src/main/java/org/koitharu/kotatsu/core/prefs/AppSettingsObserver.kt

@@ -1,8 +1,13 @@
 package org.koitharu.kotatsu.core.prefs
 
 import androidx.lifecycle.liveData
-import kotlin.coroutines.CoroutineContext
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.flow.SharingStarted
+import kotlinx.coroutines.flow.StateFlow
 import kotlinx.coroutines.flow.flow
+import kotlinx.coroutines.flow.stateIn
+import kotlinx.coroutines.flow.transform
+import kotlin.coroutines.CoroutineContext
 
 fun <T> AppSettings.observeAsFlow(key: String, valueProducer: AppSettings.() -> T) = flow {
 	var lastValue: T = valueProducer()
@@ -33,3 +38,13 @@ fun <T> AppSettings.observeAsLiveData(
 		}
 	}
 }
+
+fun <T> AppSettings.observeAsStateFlow(
+	key: String,
+	scope: CoroutineScope,
+	valueProducer: AppSettings.() -> T,
+): StateFlow<T> = observe().transform {
+	if (it == key) {
+		emit(valueProducer())
+	}
+}.stateIn(scope, SharingStarted.Eagerly, valueProducer())

app/src/main/java/org/koitharu/kotatsu/explore/ui/ExploreFragment.kt

@@ -9,6 +9,8 @@ import androidx.appcompat.widget.PopupMenu
 import androidx.core.graphics.Insets
 import androidx.core.view.updatePadding
 import androidx.fragment.app.viewModels
+import androidx.recyclerview.widget.GridLayoutManager
+import androidx.recyclerview.widget.LinearLayoutManager
 import androidx.recyclerview.widget.RecyclerView
 import coil.ImageLoader
 import com.google.android.material.snackbar.Snackbar
@@ -19,6 +21,7 @@ import org.koitharu.kotatsu.base.ui.BaseFragment
 import org.koitharu.kotatsu.base.ui.list.OnListItemClickListener
 import org.koitharu.kotatsu.base.ui.util.RecyclerViewOwner
 import org.koitharu.kotatsu.base.ui.util.ReversibleAction
+import org.koitharu.kotatsu.base.ui.util.SpanSizeResolver
 import org.koitharu.kotatsu.bookmarks.ui.BookmarksActivity
 import org.koitharu.kotatsu.databinding.FragmentExploreBinding
 import org.koitharu.kotatsu.details.ui.DetailsActivity
@@ -63,6 +66,7 @@ class ExploreFragment :
 		with(binding.recyclerView) {
 			adapter = exploreAdapter
 			setHasFixedSize(true)
+			SpanSizeResolver(this, resources.getDimensionPixelSize(R.dimen.explore_grid_width)).attach()
 			val spacing = resources.getDimensionPixelOffset(R.dimen.list_spacing)
 			paddingHorizontal = spacing
 		}
@@ -72,6 +76,7 @@ class ExploreFragment :
 		viewModel.onError.observe(viewLifecycleOwner, ::onError)
 		viewModel.onOpenManga.observe(viewLifecycleOwner, ::onOpenManga)
 		viewModel.onActionDone.observe(viewLifecycleOwner, ::onActionDone)
+		viewModel.isGrid.observe(viewLifecycleOwner, ::onGridModeChanged)
 	}
 
 	override fun onDestroyView() {
@@ -149,6 +154,16 @@ class ExploreFragment :
 		snackbar.show()
 	}
 
+	private fun onGridModeChanged(isGrid: Boolean) {
+		binding.recyclerView.layoutManager = if (isGrid) {
+			GridLayoutManager(requireContext(), 4).also { lm ->
+				lm.spanSizeLookup = ExploreGridSpanSizeLookup(checkNotNull(exploreAdapter), lm)
+			}
+		} else {
+			LinearLayoutManager(requireContext())
+		}
+	}
+
 	private inner class SourceMenuListener(
 		private val sourceItem: ExploreItem.Source,
 	) : PopupMenu.OnMenuItemClickListener {

app/src/main/java/org/koitharu/kotatsu/explore/ui/ExploreGridSpanSizeLookup.kt

@@ -0,0 +1,16 @@
+package org.koitharu.kotatsu.explore.ui
+
+import androidx.recyclerview.widget.GridLayoutManager
+import androidx.recyclerview.widget.GridLayoutManager.SpanSizeLookup
+import org.koitharu.kotatsu.explore.ui.adapter.ExploreAdapter
+
+class ExploreGridSpanSizeLookup(
+	private val adapter: ExploreAdapter,
+	private val layoutManager: GridLayoutManager,
+) : SpanSizeLookup() {
+
+	override fun getSpanSize(position: Int): Int {
+		val itemType = adapter.getItemViewType(position)
+		return if (itemType == ExploreAdapter.ITEM_TYPE_SOURCE_GRID) 1 else layoutManager.spanCount
+	}
+}

app/src/main/java/org/koitharu/kotatsu/explore/ui/ExploreViewModel.kt

@@ -5,22 +5,26 @@ import androidx.lifecycle.asFlow
 import androidx.lifecycle.viewModelScope
 import dagger.hilt.android.lifecycle.HiltViewModel
 import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.flow.combine
 import kotlinx.coroutines.flow.distinctUntilChanged
 import kotlinx.coroutines.flow.filter
 import kotlinx.coroutines.flow.flatMapLatest
 import kotlinx.coroutines.flow.flowOf
 import kotlinx.coroutines.flow.map
 import kotlinx.coroutines.flow.onStart
+import kotlinx.coroutines.plus
 import org.koitharu.kotatsu.R
 import org.koitharu.kotatsu.base.domain.ReversibleHandle
 import org.koitharu.kotatsu.base.ui.BaseViewModel
 import org.koitharu.kotatsu.base.ui.util.ReversibleAction
 import org.koitharu.kotatsu.core.prefs.AppSettings
+import org.koitharu.kotatsu.core.prefs.observeAsStateFlow
 import org.koitharu.kotatsu.explore.domain.ExploreRepository
 import org.koitharu.kotatsu.explore.ui.model.ExploreItem
 import org.koitharu.kotatsu.parsers.model.Manga
 import org.koitharu.kotatsu.parsers.model.MangaSource
 import org.koitharu.kotatsu.utils.SingleLiveEvent
+import org.koitharu.kotatsu.utils.asFlowLiveData
 import org.koitharu.kotatsu.utils.ext.asLiveDataDistinct
 import javax.inject.Inject
 
@@ -30,8 +34,15 @@ class ExploreViewModel @Inject constructor(
 	private val exploreRepository: ExploreRepository,
 ) : BaseViewModel() {
 
+	private val gridMode = settings.observeAsStateFlow(
+		key = AppSettings.KEY_SOURCES_GRID,
+		scope = viewModelScope + Dispatchers.IO,
+		valueProducer = { isSourcesGridMode },
+	)
+
 	val onOpenManga = SingleLiveEvent<Manga>()
 	val onActionDone = SingleLiveEvent<ReversibleAction>()
+	val isGrid = gridMode.asFlowLiveData(viewModelScope.coroutineContext)
 
 	val content: LiveData<List<ExploreItem>> = isLoading.asFlow().flatMapLatest { loading ->
 		if (loading) {
@@ -67,16 +78,16 @@ class ExploreViewModel @Inject constructor(
 		.onStart { emit("") }
 		.map { settings.getMangaSources(includeHidden = false) }
 		.distinctUntilChanged()
-		.map { buildList(it) }
+		.combine(gridMode) { content, grid -> buildList(content, grid) }
 
-	private fun buildList(sources: List<MangaSource>): List<ExploreItem> {
+	private fun buildList(sources: List<MangaSource>, isGrid: Boolean): List<ExploreItem> {
 		val result = ArrayList<ExploreItem>(sources.size + 3)
 		result += ExploreItem.Buttons(
 			isSuggestionsEnabled = settings.isSuggestionsEnabled,
 		)
 		result += ExploreItem.Header(R.string.remote_sources, sources.isNotEmpty())
 		if (sources.isNotEmpty()) {
-			sources.mapTo(result) { ExploreItem.Source(it) }
+			sources.mapTo(result) { ExploreItem.Source(it, isGrid) }
 		} else {
 			result += ExploreItem.EmptyHint(
 				icon = R.drawable.ic_empty_common,

app/src/main/java/org/koitharu/kotatsu/explore/ui/adapter/ExploreAdapter.kt

@@ -11,11 +11,25 @@ class ExploreAdapter(
 	lifecycleOwner: LifecycleOwner,
 	listener: ExploreListEventListener,
 	clickListener: OnListItemClickListener<ExploreItem.Source>,
-) : AsyncListDifferDelegationAdapter<ExploreItem>(
+) : AsyncListDifferDelegationAdapter<ExploreItem>(ExploreDiffCallback()) {
-	ExploreDiffCallback(),
+
-	exploreButtonsAD(listener),
+	init {
-	exploreSourcesHeaderAD(listener),
+		delegatesManager
-	exploreSourceItemAD(coil, clickListener, lifecycleOwner),
+			.addDelegate(ITEM_TYPE_BUTTONS, exploreButtonsAD(listener))
-	exploreEmptyHintListAD(listener),
+			.addDelegate(ITEM_TYPE_HEADER, exploreSourcesHeaderAD(listener))
-	exploreLoadingAD(),
+			.addDelegate(ITEM_TYPE_SOURCE_LIST, exploreSourceListItemAD(coil, clickListener, lifecycleOwner))
-)
+			.addDelegate(ITEM_TYPE_SOURCE_GRID, exploreSourceGridItemAD(coil, clickListener, lifecycleOwner))
+			.addDelegate(ITEM_TYPE_HINT, exploreEmptyHintListAD(listener))
+			.addDelegate(ITEM_TYPE_LOADING, exploreLoadingAD())
+	}
+
+	companion object {
+
+		const val ITEM_TYPE_BUTTONS = 0
+		const val ITEM_TYPE_HEADER = 1
+		const val ITEM_TYPE_SOURCE_LIST = 2
+		const val ITEM_TYPE_SOURCE_GRID = 3
+		const val ITEM_TYPE_HINT = 4
+		const val ITEM_TYPE_LOADING = 5
+	}
+}

app/src/main/java/org/koitharu/kotatsu/explore/ui/adapter/ExploreAdapterDelegates.kt

@@ -12,7 +12,8 @@ import org.koitharu.kotatsu.base.ui.list.OnListItemClickListener
 import org.koitharu.kotatsu.core.parser.favicon.faviconUri
 import org.koitharu.kotatsu.databinding.ItemEmptyCardBinding
 import org.koitharu.kotatsu.databinding.ItemExploreButtonsBinding
-import org.koitharu.kotatsu.databinding.ItemExploreSourceBinding
+import org.koitharu.kotatsu.databinding.ItemExploreSourceGridBinding
+import org.koitharu.kotatsu.databinding.ItemExploreSourceListBinding
 import org.koitharu.kotatsu.databinding.ItemHeaderButtonBinding
 import org.koitharu.kotatsu.explore.ui.model.ExploreItem
 import org.koitharu.kotatsu.list.ui.adapter.ListStateHolderListener
@@ -25,7 +26,7 @@ import org.koitharu.kotatsu.utils.image.FaviconFallbackDrawable
 fun exploreButtonsAD(
 	clickListener: View.OnClickListener,
 ) = adapterDelegateViewBinding<ExploreItem.Buttons, ExploreItem, ItemExploreButtonsBinding>(
-	{ layoutInflater, parent -> ItemExploreButtonsBinding.inflate(layoutInflater, parent, false) }
+	{ layoutInflater, parent -> ItemExploreButtonsBinding.inflate(layoutInflater, parent, false) },
 ) {
 
 	binding.buttonBookmarks.setOnClickListener(clickListener)
@@ -43,7 +44,7 @@ fun exploreButtonsAD(
 fun exploreSourcesHeaderAD(
 	listener: ExploreListEventListener,
 ) = adapterDelegateViewBinding<ExploreItem.Header, ExploreItem, ItemHeaderButtonBinding>(
-	{ layoutInflater, parent -> ItemHeaderButtonBinding.inflate(layoutInflater, parent, false) }
+	{ layoutInflater, parent -> ItemHeaderButtonBinding.inflate(layoutInflater, parent, false) },
 ) {
 
 	val listenerAdapter = View.OnClickListener {
@@ -58,13 +59,44 @@ fun exploreSourcesHeaderAD(
 	}
 }
 
-fun exploreSourceItemAD(
+fun exploreSourceListItemAD(
 	coil: ImageLoader,
 	listener: OnListItemClickListener<ExploreItem.Source>,
 	lifecycleOwner: LifecycleOwner,
-) = adapterDelegateViewBinding<ExploreItem.Source, ExploreItem, ItemExploreSourceBinding>(
+) = adapterDelegateViewBinding<ExploreItem.Source, ExploreItem, ItemExploreSourceListBinding>(
-	{ layoutInflater, parent -> ItemExploreSourceBinding.inflate(layoutInflater, parent, false) },
+	{ layoutInflater, parent -> ItemExploreSourceListBinding.inflate(layoutInflater, parent, false) },
-	on = { item, _, _ -> item is ExploreItem.Source }
+	on = { item, _, _ -> item is ExploreItem.Source && !item.isGrid },
+) {
+
+	val eventListener = AdapterDelegateClickListenerAdapter(this, listener)
+
+	binding.root.setOnClickListener(eventListener)
+	binding.root.setOnLongClickListener(eventListener)
+
+	bind {
+		binding.textViewTitle.text = item.source.title
+		val fallbackIcon = FaviconFallbackDrawable(context, item.source.name)
+		binding.imageViewIcon.newImageRequest(item.source.faviconUri())?.run {
+			fallback(fallbackIcon)
+			placeholder(fallbackIcon)
+			error(fallbackIcon)
+			lifecycle(lifecycleOwner)
+			enqueueWith(coil)
+		}
+	}
+
+	onViewRecycled {
+		binding.imageViewIcon.disposeImageRequest()
+	}
+}
+
+fun exploreSourceGridItemAD(
+	coil: ImageLoader,
+	listener: OnListItemClickListener<ExploreItem.Source>,
+	lifecycleOwner: LifecycleOwner,
+) = adapterDelegateViewBinding<ExploreItem.Source, ExploreItem, ItemExploreSourceGridBinding>(
+	{ layoutInflater, parent -> ItemExploreSourceGridBinding.inflate(layoutInflater, parent, false) },
+	on = { item, _, _ -> item is ExploreItem.Source && item.isGrid },
 ) {
 
 	val eventListener = AdapterDelegateClickListenerAdapter(this, listener)
@@ -92,7 +124,7 @@ fun exploreSourceItemAD(
 fun exploreEmptyHintListAD(
 	listener: ListStateHolderListener,
 ) = adapterDelegateViewBinding<ExploreItem.EmptyHint, ExploreItem, ItemEmptyCardBinding>(
-	{ inflater, parent -> ItemEmptyCardBinding.inflate(inflater, parent, false) }
+	{ inflater, parent -> ItemEmptyCardBinding.inflate(inflater, parent, false) },
 ) {
 
 	binding.buttonRetry.setOnClickListener { listener.onEmptyActionClick() }

app/src/main/java/org/koitharu/kotatsu/explore/ui/adapter/ExploreDiffCallback.kt

@@ -12,11 +12,13 @@ class ExploreDiffCallback : DiffUtil.ItemCallback<ExploreItem>() {
 			oldItem is ExploreItem.Loading && newItem is ExploreItem.Loading -> true
 			oldItem is ExploreItem.EmptyHint && newItem is ExploreItem.EmptyHint -> true
 			oldItem is ExploreItem.Source && newItem is ExploreItem.Source -> {
-				oldItem.source == newItem.source
+				oldItem.source == newItem.source && oldItem.isGrid == newItem.isGrid
 			}
+
 			oldItem is ExploreItem.Header && newItem is ExploreItem.Header -> {
 				oldItem.titleResId == newItem.titleResId
 			}
+
 			else -> false
 		}
 	}

app/src/main/java/org/koitharu/kotatsu/explore/ui/model/ExploreItem.kt

@@ -54,6 +54,7 @@ sealed interface ExploreItem : ListModel {
 
 	class Source(
 		val source: MangaSource,
+		val isGrid: Boolean,
 	) : ExploreItem {
 
 		override fun equals(other: Any?): Boolean {
@@ -63,12 +64,15 @@ sealed interface ExploreItem : ListModel {
 			other as Source
 
 			if (source != other.source) return false
+			if (isGrid != other.isGrid) return false
 
 			return true
 		}
 
 		override fun hashCode(): Int {
-			return source.hashCode()
+			var result = source.hashCode()
+			result = 31 * result + isGrid.hashCode()
+			return result
 		}
 	}
 

app/src/main/java/org/koitharu/kotatsu/scrobbling/ui/selector/ScrobblingSelectorBottomSheet.kt

@@ -91,6 +91,12 @@ class ScrobblingSelectorBottomSheet :
 		viewModel.onClose.observe(viewLifecycleOwner) {
 			dismiss()
 		}
+		viewModel.selectedScrobblerIndex.observe(viewLifecycleOwner) { index ->
+			val tab = binding.tabs.getTabAt(index)
+			if (tab != null && !tab.isSelected) {
+				tab.select()
+			}
+		}
 		viewModel.searchQuery.observe(viewLifecycleOwner) {
 			binding.headerBar.subtitle = it
 		}
@@ -106,14 +112,16 @@ class ScrobblingSelectorBottomSheet :
 		viewModel.selectedItemId.value = item.id
 	}
 
-	override fun onRetryClick(error: Throwable) = Unit
+	override fun onRetryClick(error: Throwable) {
+		viewModel.retry()
+	}
 
 	override fun onEmptyActionClick() {
 		openSearch()
 	}
 
 	override fun onScrolledToEnd() {
-		viewModel.loadList(append = true)
+		viewModel.loadNextPage()
 	}
 
 	override fun onMenuItemActionExpand(item: MenuItem): Boolean {

app/src/main/java/org/koitharu/kotatsu/scrobbling/ui/selector/ScrobblingSelectorViewModel.kt

@@ -11,18 +11,19 @@ import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.Job
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.combine
-import kotlinx.coroutines.flow.filterNotNull
 import org.koitharu.kotatsu.R
 import org.koitharu.kotatsu.base.ui.BaseViewModel
-import org.koitharu.kotatsu.list.ui.model.EmptyHint
 import org.koitharu.kotatsu.list.ui.model.ListModel
 import org.koitharu.kotatsu.list.ui.model.LoadingFooter
 import org.koitharu.kotatsu.list.ui.model.LoadingState
 import org.koitharu.kotatsu.parsers.model.Manga
+import org.koitharu.kotatsu.parsers.util.runCatchingCancellable
 import org.koitharu.kotatsu.scrobbling.domain.Scrobbler
 import org.koitharu.kotatsu.scrobbling.domain.model.ScrobblerManga
+import org.koitharu.kotatsu.scrobbling.ui.selector.model.ScrobblerHint
 import org.koitharu.kotatsu.utils.SingleLiveEvent
 import org.koitharu.kotatsu.utils.ext.asLiveDataDistinct
+import org.koitharu.kotatsu.utils.ext.printStackTraceDebug
 import org.koitharu.kotatsu.utils.ext.requireValue
 
 class ScrobblingSelectorViewModel @AssistedInject constructor(
@@ -34,8 +35,9 @@ class ScrobblingSelectorViewModel @AssistedInject constructor(
 
 	val selectedScrobblerIndex = MutableLiveData(0)
 
-	private val scrobblerMangaList = MutableStateFlow<List<ScrobblerManga>?>(null)
+	private val scrobblerMangaList = MutableStateFlow<List<ScrobblerManga>>(emptyList())
-	private val hasNextPage = MutableStateFlow(false)
+	private val hasNextPage = MutableStateFlow(true)
+	private val listError = MutableStateFlow<Throwable?>(null)
 	private var loadingJob: Job? = null
 	private var doneJob: Job? = null
 	private var initJob: Job? = null
@@ -44,13 +46,24 @@ class ScrobblingSelectorViewModel @AssistedInject constructor(
 		get() = availableScrobblers[selectedScrobblerIndex.requireValue()]
 
 	val content: LiveData<List<ListModel>> = combine(
-		scrobblerMangaList.filterNotNull(),
+		scrobblerMangaList,
+		listError,
 		hasNextPage,
-	) { list, isHasNextPage ->
+	) { list, error, isHasNextPage ->
+		if (list.isNotEmpty()) {
+			if (isHasNextPage) {
+				list + LoadingFooter
+			} else {
+				list
+			}
+		} else {
+			listOf(
 				when {
-			list.isEmpty() -> listOf(emptyResultsHint())
+					error != null -> errorHint(error)
-			isHasNextPage -> list + LoadingFooter
+					isHasNextPage -> LoadingFooter
-			else -> list
+					else -> emptyResultsHint()
+				},
+			)
 		}
 	}.asLiveDataDistinct(viewModelScope.coroutineContext + Dispatchers.Default, listOf(LoadingState))
 
@@ -59,7 +72,7 @@ class ScrobblingSelectorViewModel @AssistedInject constructor(
 	val onClose = SingleLiveEvent<Unit>()
 
 	val isEmpty: Boolean
-		get() = scrobblerMangaList.value.isNullOrEmpty()
+		get() = scrobblerMangaList.value.isEmpty()
 
 	init {
 		initialize()
@@ -71,22 +84,39 @@ class ScrobblingSelectorViewModel @AssistedInject constructor(
 		loadList(append = false)
 	}
 
-	fun loadList(append: Boolean) {
+	fun loadNextPage() {
-		if (loadingJob?.isActive == true) {
+		if (scrobblerMangaList.value.isNotEmpty() && hasNextPage.value) {
-			return
+			loadList(append = true)
+		}
 	}
-		if (append && !hasNextPage.value) {
+
+	fun retry() {
+		loadingJob?.cancel()
+		hasNextPage.value = true
+		scrobblerMangaList.value = emptyList()
+		loadList(append = false)
+	}
+
+	private fun loadList(append: Boolean) {
+		if (loadingJob?.isActive == true) {
 			return
 		}
 		loadingJob = launchLoadingJob(Dispatchers.Default) {
-			val offset = if (append) scrobblerMangaList.value?.size ?: 0 else 0
+			listError.value = null
-			val list = currentScrobbler.findManga(checkNotNull(searchQuery.value), offset)
+			val offset = if (append) scrobblerMangaList.value.size else 0
+			runCatchingCancellable {
+				currentScrobbler.findManga(checkNotNull(searchQuery.value), offset)
+			}.onSuccess { list ->
 				if (!append) {
 					scrobblerMangaList.value = list
 				} else if (list.isNotEmpty()) {
-				scrobblerMangaList.value = scrobblerMangaList.value?.plus(list) ?: list
+					scrobblerMangaList.value = scrobblerMangaList.value + list
 				}
 				hasNextPage.value = list.isNotEmpty()
+			}.onFailure { error ->
+				error.printStackTraceDebug()
+				listError.value = error
+			}
 		}
 	}
 
@@ -113,8 +143,8 @@ class ScrobblingSelectorViewModel @AssistedInject constructor(
 	private fun initialize() {
 		initJob?.cancel()
 		loadingJob?.cancel()
-		hasNextPage.value = false
+		hasNextPage.value = true
-		scrobblerMangaList.value = null
+		scrobblerMangaList.value = emptyList()
 		initJob = launchJob(Dispatchers.Default) {
 			try {
 				val info = currentScrobbler.getScrobblingInfoOrNull(manga.id)
@@ -127,13 +157,22 @@ class ScrobblingSelectorViewModel @AssistedInject constructor(
 		}
 	}
 
-	private fun emptyResultsHint() = EmptyHint(
+	private fun emptyResultsHint() = ScrobblerHint(
 		icon = R.drawable.ic_empty_history,
 		textPrimary = R.string.nothing_found,
 		textSecondary = R.string.text_search_holder_secondary,
+		error = null,
 		actionStringRes = R.string.search,
 	)
 
+	private fun errorHint(e: Throwable) = ScrobblerHint(
+		icon = R.drawable.ic_error_large,
+		textPrimary = R.string.error_occurred,
+		error = e,
+		textSecondary = 0,
+		actionStringRes = R.string.try_again,
+	)
+
 	@AssistedFactory
 	interface Factory {
 

app/src/main/java/org/koitharu/kotatsu/scrobbling/ui/selector/adapter/ScrobblerHintAD.kt

@@ -0,0 +1,37 @@
+package org.koitharu.kotatsu.scrobbling.ui.selector.adapter
+
+import com.hannesdorfmann.adapterdelegates4.dsl.adapterDelegateViewBinding
+import org.koitharu.kotatsu.databinding.ItemEmptyHintBinding
+import org.koitharu.kotatsu.list.ui.adapter.ListStateHolderListener
+import org.koitharu.kotatsu.list.ui.model.ListModel
+import org.koitharu.kotatsu.scrobbling.ui.selector.model.ScrobblerHint
+import org.koitharu.kotatsu.utils.ext.getDisplayMessage
+import org.koitharu.kotatsu.utils.ext.setTextAndVisible
+import org.koitharu.kotatsu.utils.ext.textAndVisible
+
+fun scrobblerHintAD(
+	listener: ListStateHolderListener,
+) = adapterDelegateViewBinding<ScrobblerHint, ListModel, ItemEmptyHintBinding>(
+	{ inflater, parent -> ItemEmptyHintBinding.inflate(inflater, parent, false) },
+) {
+
+	binding.buttonRetry.setOnClickListener {
+		val e = item.error
+		if (e != null) {
+			listener.onRetryClick(e)
+		} else {
+			listener.onEmptyActionClick()
+		}
+	}
+
+	bind {
+		binding.icon.setImageResource(item.icon)
+		binding.textPrimary.setText(item.textPrimary)
+		if (item.error != null) {
+			binding.textSecondary.textAndVisible = item.error?.getDisplayMessage(context.resources)
+		} else {
+			binding.textSecondary.setTextAndVisible(item.textSecondary)
+		}
+		binding.buttonRetry.setTextAndVisible(item.actionStringRes)
+	}
+}

app/src/main/java/org/koitharu/kotatsu/scrobbling/ui/selector/adapter/ScrobblerSelectorAdapter.kt

@@ -6,11 +6,11 @@ import coil.ImageLoader
 import com.hannesdorfmann.adapterdelegates4.AsyncListDifferDelegationAdapter
 import org.koitharu.kotatsu.base.ui.list.OnListItemClickListener
 import org.koitharu.kotatsu.list.ui.adapter.ListStateHolderListener
-import org.koitharu.kotatsu.list.ui.adapter.emptyHintAD
 import org.koitharu.kotatsu.list.ui.adapter.loadingFooterAD
 import org.koitharu.kotatsu.list.ui.adapter.loadingStateAD
 import org.koitharu.kotatsu.list.ui.model.ListModel
 import org.koitharu.kotatsu.scrobbling.domain.model.ScrobblerManga
+import org.koitharu.kotatsu.scrobbling.ui.selector.model.ScrobblerHint
 import kotlin.jvm.internal.Intrinsics
 
 class ScrobblerSelectorAdapter(
@@ -24,7 +24,7 @@ class ScrobblerSelectorAdapter(
 		delegatesManager.addDelegate(loadingStateAD())
 			.addDelegate(scrobblingMangaAD(lifecycleOwner, coil, clickListener))
 			.addDelegate(loadingFooterAD())
-			.addDelegate(emptyHintAD(stateHolderListener))
+			.addDelegate(scrobblerHintAD(stateHolderListener))
 	}
 
 	private class DiffCallback : DiffUtil.ItemCallback<ListModel>() {
@@ -33,6 +33,7 @@ class ScrobblerSelectorAdapter(
 			return when {
 				oldItem === newItem -> true
 				oldItem is ScrobblerManga && newItem is ScrobblerManga -> oldItem.id == newItem.id
+				oldItem is ScrobblerHint && newItem is ScrobblerHint -> oldItem.textPrimary == newItem.textPrimary
 				else -> false
 			}
 		}

app/src/main/java/org/koitharu/kotatsu/scrobbling/ui/selector/model/ScrobblerHint.kt

@@ -0,0 +1,38 @@
+package org.koitharu.kotatsu.scrobbling.ui.selector.model
+
+import androidx.annotation.DrawableRes
+import androidx.annotation.StringRes
+import org.koitharu.kotatsu.list.ui.model.ListModel
+
+class ScrobblerHint(
+	@DrawableRes val icon: Int,
+	@StringRes val textPrimary: Int,
+	@StringRes val textSecondary: Int,
+	val error: Throwable?,
+	@StringRes val actionStringRes: Int,
+) : ListModel {
+
+	override fun equals(other: Any?): Boolean {
+		if (this === other) return true
+		if (javaClass != other?.javaClass) return false
+
+		other as ScrobblerHint
+
+		if (icon != other.icon) return false
+		if (textPrimary != other.textPrimary) return false
+		if (textSecondary != other.textSecondary) return false
+		if (error != other.error) return false
+		if (actionStringRes != other.actionStringRes) return false
+
+		return true
+	}
+
+	override fun hashCode(): Int {
+		var result = icon
+		result = 31 * result + textPrimary
+		result = 31 * result + textSecondary
+		result = 31 * result + (error?.hashCode() ?: 0)
+		result = 31 * result + actionStringRes
+		return result
+	}
+}

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

@@ -1,7 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <androidx.recyclerview.widget.RecyclerView
 	xmlns:android="http://schemas.android.com/apk/res/android"
-	xmlns:app="http://schemas.android.com/apk/res-auto"
 	xmlns:tools="http://schemas.android.com/tools"
 	android:id="@+id/recyclerView"
 	android:layout_width="match_parent"
@@ -9,9 +8,8 @@
 	android:clipToPadding="false"
 	android:orientation="vertical"
 	android:paddingLeft="@dimen/list_spacing"
-	android:paddingRight="@dimen/list_spacing"
 	android:paddingTop="@dimen/grid_spacing_outer"
+	android:paddingRight="@dimen/list_spacing"
 	android:paddingBottom="@dimen/grid_spacing_outer"
 	android:scrollbars="vertical"
-	app:layoutManager="androidx.recyclerview.widget.LinearLayoutManager"
+	tools:listitem="@layout/item_explore_source_list" />
-	tools:listitem="@layout/item_explore_source" />

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

@@ -0,0 +1,55 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout
+	xmlns:android="http://schemas.android.com/apk/res/android"
+	xmlns:app="http://schemas.android.com/apk/res-auto"
+	xmlns:tools="http://schemas.android.com/tools"
+	android:layout_width="match_parent"
+	android:layout_height="wrap_content"
+	android:padding="@dimen/margin_normal">
+
+	<ImageView
+		android:id="@+id/icon"
+		android:layout_width="120dp"
+		android:layout_height="120dp"
+		android:contentDescription="@null"
+		android:scaleType="fitCenter"
+		app:layout_constraintStart_toStartOf="parent"
+		app:layout_constraintTop_toTopOf="parent"
+		tools:src="@drawable/ic_empty_favourites" />
+
+	<TextView
+		android:id="@+id/textPrimary"
+		android:layout_width="0dp"
+		android:layout_height="wrap_content"
+		android:layout_marginStart="@dimen/margin_small"
+		android:textAppearance="?attr/textAppearanceTitleLarge"
+		app:layout_constraintEnd_toEndOf="parent"
+		app:layout_constraintStart_toEndOf="@id/icon"
+		app:layout_constraintTop_toTopOf="parent"
+		tools:text="@tools:sample/lorem[3]" />
+
+	<TextView
+		android:id="@+id/textSecondary"
+		android:layout_width="0dp"
+		android:layout_height="wrap_content"
+		android:layout_marginStart="@dimen/margin_small"
+		android:layout_marginTop="@dimen/margin_small"
+		android:textAppearance="?attr/textAppearanceBodyMedium"
+		app:layout_constraintEnd_toEndOf="parent"
+		app:layout_constraintStart_toEndOf="@id/icon"
+		app:layout_constraintTop_toBottomOf="@id/textPrimary"
+		tools:text="@tools:sample/lorem[15]" />
+
+	<Button
+		android:id="@+id/button_retry"
+		style="@style/Widget.Material3.Button.TonalButton"
+		android:layout_width="wrap_content"
+		android:layout_height="wrap_content"
+		android:layout_marginTop="@dimen/margin_small"
+		android:visibility="gone"
+		app:layout_constraintEnd_toEndOf="parent"
+		app:layout_constraintTop_toBottomOf="@id/textSecondary"
+		tools:text="@string/try_again"
+		tools:visibility="visible" />
+
+</androidx.constraintlayout.widget.ConstraintLayout>

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

@@ -0,0 +1,38 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout
+	xmlns:android="http://schemas.android.com/apk/res/android"
+	xmlns:app="http://schemas.android.com/apk/res-auto"
+	xmlns:tools="http://schemas.android.com/tools"
+	android:layout_width="match_parent"
+	android:layout_height="wrap_content"
+	android:background="@drawable/list_selector"
+	android:clipChildren="false"
+	android:gravity="center_horizontal"
+	android:orientation="vertical"
+	android:padding="@dimen/list_spacing"
+	tools:layout_width="120dp">
+
+	<com.google.android.material.imageview.ShapeableImageView
+		android:id="@+id/imageView_icon"
+		android:layout_width="72dp"
+		android:layout_height="72dp"
+		android:background="?colorControlHighlight"
+		android:labelFor="@id/textView_title"
+		android:scaleType="fitCenter"
+		app:shapeAppearance="?shapeAppearanceCornerMedium"
+		tools:src="@tools:sample/avatars" />
+
+	<TextView
+		android:id="@+id/textView_title"
+		android:layout_width="match_parent"
+		android:layout_height="wrap_content"
+		android:layout_marginTop="@dimen/list_spacing"
+		android:elegantTextHeight="false"
+		android:ellipsize="end"
+		android:gravity="center_horizontal"
+		android:singleLine="true"
+		android:textAlignment="center"
+		android:textAppearance="?attr/textAppearanceBodyMedium"
+		tools:text="@tools:sample/lorem[2]" />
+
+</LinearLayout>

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

@@ -31,6 +31,7 @@
 	<dimen name="reading_progress_text_size">10dp</dimen>
 	<dimen name="reader_bar_inset_fallback">8dp</dimen>
 	<dimen name="scrobbling_list_spacing">12dp</dimen>
+	<dimen name="explore_grid_width">120dp</dimen>
 
 	<dimen name="search_suggestions_manga_height">124dp</dimen>
 	<dimen name="search_suggestions_manga_spacing">4dp</dimen>

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

@@ -412,4 +412,5 @@
 	<string name="theme_name_dynamic">Dynamic</string>
 	<string name="color_theme">Color scheme</string>
 	<string name="theme_name_october">October</string>
+	<string name="show_in_grid_view">Show in grid view</string>
 </resources>

app/src/main/res/xml/pref_content.xml

@@ -9,10 +9,16 @@
 		android:key="remote_sources"
 		android:title="@string/remote_sources" />
 
+	<SwitchPreferenceCompat
+		android:defaultValue="false"
+		android:key="sources_grid"
+		android:title="@string/show_in_grid_view" />
+
 	<PreferenceScreen
 		android:fragment="org.koitharu.kotatsu.settings.SuggestionsSettingsFragment"
 		android:key="suggestions"
-		android:title="@string/suggestions" />
+		android:title="@string/suggestions"
+		app:allowDividerAbove="true" />
 
 	<ListPreference
 		android:entries="@array/doh_providers"

build.gradle

@@ -4,9 +4,9 @@ buildscript {
 		mavenCentral()
 	}
 	dependencies {
-		classpath 'com.android.tools.build:gradle:7.4.0'
+		classpath 'com.android.tools.build:gradle:7.4.1'
-		classpath 'org.jetbrains.kotlin:kotlin-gradle-plugin:1.8.0'
+		classpath 'org.jetbrains.kotlin:kotlin-gradle-plugin:1.8.10'
-		classpath 'com.google.dagger:hilt-android-gradle-plugin:2.44'
+		classpath 'com.google.dagger:hilt-android-gradle-plugin:2.44.2'
 	}
 }