Draft double reader implementation

Currently translated at 100.0% (489 of 489 strings)

Co-authored-by: Eduardo Malaspina <vaio0@swismail.com>
Translate-URL: https://hosted.weblate.org/projects/kotatsu/strings/es/
Translation: Kotatsu/Strings

app/build.gradle

@@ -16,8 +16,8 @@ android {
 		applicationId 'org.koitharu.kotatsu'
 		minSdk = 21
 		targetSdk = 34
-		versionCode = 575
+		versionCode = 584
-		versionName = '6.0.2'
+		versionName = '6.1.6'
 		generatedDensities = []
 		testInstrumentationRunner "org.koitharu.kotatsu.HiltTestRunner"
 		ksp {
@@ -81,7 +81,7 @@ afterEvaluate {
 }
 dependencies {
 	//noinspection GradleDependency
-	implementation('com.github.KotatsuApp:kotatsu-parsers:3a76504380') {
+	implementation('com.github.KotatsuApp:kotatsu-parsers:400a90464e') {
 		exclude group: 'org.json', module: 'json'
 	}
 
@@ -89,21 +89,21 @@ dependencies {
 	implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-android:1.7.3'
 
 	implementation 'androidx.appcompat:appcompat:1.6.1'
-	implementation 'androidx.core:core-ktx:1.10.1'
+	implementation 'androidx.core:core-ktx:1.12.0'
-	implementation 'androidx.activity:activity-ktx:1.7.2'
+	implementation 'androidx.activity:activity-ktx:1.8.0'
 	implementation 'androidx.fragment:fragment-ktx:1.6.1'
-	implementation 'androidx.lifecycle:lifecycle-viewmodel-ktx:2.6.1'
+	implementation 'androidx.lifecycle:lifecycle-viewmodel-ktx:2.6.2'
-	implementation 'androidx.lifecycle:lifecycle-livedata-ktx:2.6.1'
+	implementation 'androidx.lifecycle:lifecycle-livedata-ktx:2.6.2'
-	implementation 'androidx.lifecycle:lifecycle-service:2.6.1'
+	implementation 'androidx.lifecycle:lifecycle-service:2.6.2'
-	implementation 'androidx.lifecycle:lifecycle-process:2.6.1'
+	implementation 'androidx.lifecycle:lifecycle-process:2.6.2'
 	implementation 'androidx.constraintlayout:constraintlayout:2.1.4'
 	implementation 'androidx.swiperefreshlayout:swiperefreshlayout:1.1.0'
 	implementation 'androidx.recyclerview:recyclerview:1.3.1'
 	implementation 'androidx.viewpager2:viewpager2:1.1.0-beta02'
 	implementation 'androidx.preference:preference-ktx:1.2.1'
 	implementation 'androidx.biometric:biometric-ktx:1.2.0-alpha05'
-	implementation 'com.google.android.material:material:1.9.0'
+	implementation 'com.google.android.material:material:1.10.0'
-	implementation 'androidx.lifecycle:lifecycle-common-java8:2.6.1'
+	implementation 'androidx.lifecycle:lifecycle-common-java8:2.6.2'
 
 	// TODO https://issuetracker.google.com/issues/254846063
 	implementation 'androidx.work:work-runtime-ktx:2.8.1'
@@ -120,24 +120,24 @@ dependencies {
 
 	implementation 'com.squareup.okhttp3:okhttp:4.11.0'
 	implementation 'com.squareup.okhttp3:okhttp-dnsoverhttps:4.11.0'
-	implementation 'com.squareup.okio:okio:3.5.0'
+	implementation 'com.squareup.okio:okio:3.6.0'
 
 	implementation 'com.hannesdorfmann:adapterdelegates4-kotlin-dsl:4.3.2'
 	implementation 'com.hannesdorfmann:adapterdelegates4-kotlin-dsl-viewbinding:4.3.2'
 
-	implementation 'com.google.dagger:hilt-android:2.47'
+	implementation 'com.google.dagger:hilt-android:2.48.1'
-	kapt 'com.google.dagger:hilt-compiler:2.47'
+	kapt 'com.google.dagger:hilt-compiler:2.48.1'
 	implementation 'androidx.hilt:hilt-work:1.0.0'
 	kapt 'androidx.hilt:hilt-compiler:1.0.0'
 
 	implementation 'io.coil-kt:coil-base:2.4.0'
 	implementation 'io.coil-kt:coil-svg:2.4.0'
-	implementation 'com.github.KotatsuApp:subsampling-scale-image-view:9b1d20be67'
+	implementation 'com.github.KotatsuApp:subsampling-scale-image-view:169806d928'
 	implementation 'com.github.solkin:disk-lru-cache:1.4'
 	implementation 'io.noties.markwon:core:4.6.2'
 
-	implementation 'ch.acra:acra-http:5.11.1'
+	implementation 'ch.acra:acra-http:5.11.2'
-	implementation 'ch.acra:acra-dialog:5.11.1'
+	implementation 'ch.acra:acra-dialog:5.11.2'
 
 	debugImplementation 'com.squareup.leakcanary:leakcanary-android:2.12'
 
@@ -155,6 +155,6 @@ dependencies {
 	androidTestImplementation 'androidx.room:room-testing:2.5.2'
 	androidTestImplementation 'com.squareup.moshi:moshi-kotlin:1.15.0'
 
-	androidTestImplementation 'com.google.dagger:hilt-android-testing:2.47'
+	androidTestImplementation 'com.google.dagger:hilt-android-testing:2.48.1'
-	kaptAndroidTest 'com.google.dagger:hilt-android-compiler:2.47'
+	kaptAndroidTest 'com.google.dagger:hilt-android-compiler:2.48.1'
 }

app/src/main/AndroidManifest.xml

@@ -19,6 +19,7 @@
 	<uses-permission android:name="android.permission.WRITE_SYNC_SETTINGS" />
 	<uses-permission android:name="android.permission.POST_NOTIFICATIONS" />
 	<uses-permission android:name="android.permission.FOREGROUND_SERVICE_DATA_SYNC" />
+	<uses-permission android:name="android.permission.REQUEST_INSTALL_PACKAGES" />
 	<uses-permission
 		android:name="android.permission.WRITE_EXTERNAL_STORAGE"
 		android:maxSdkVersion="29" />
@@ -95,7 +96,12 @@
 			android:label="@string/search" />
 		<activity
 			android:name="org.koitharu.kotatsu.search.ui.MangaListActivity"
-			android:label="@string/search_manga" />
+			android:exported="true"
+			android:label="@string/manga_list">
+			<intent-filter>
+				<action android:name="${applicationId}.action.EXPLORE_MANGA" />
+			</intent-filter>
+		</activity>
 		<activity
 			android:name="org.koitharu.kotatsu.history.ui.HistoryActivity"
 			android:label="@string/history" />
@@ -138,6 +144,7 @@
 			android:windowSoftInputMode="adjustResize" />
 		<activity
 			android:name="org.koitharu.kotatsu.browser.cloudflare.CloudFlareActivity"
+			android:autoRemoveFromRecents="true"
 			android:configChanges="orientation|screenSize|screenLayout|keyboardHidden"
 			android:windowSoftInputMode="adjustResize" />
 		<activity
@@ -313,6 +320,13 @@
 				android:name="android.appwidget.provider"
 				android:resource="@xml/widget_recent" />
 		</receiver>
+		<receiver
+			android:name="org.koitharu.kotatsu.settings.about.UpdateDownloadReceiver"
+			android:exported="true">
+			<intent-filter>
+				<action android:name="android.intent.action.DOWNLOAD_COMPLETE" />
+			</intent-filter>
+		</receiver>
 
 		<meta-data
 			android:name="android.webkit.WebView.EnableSafeBrowsing"

app/src/main/kotlin/org/koitharu/kotatsu/bookmarks/ui/BookmarksFragment.kt

@@ -14,7 +14,6 @@ import androidx.core.view.updatePadding
 import androidx.fragment.app.viewModels
 import androidx.recyclerview.widget.GridLayoutManager
 import coil.ImageLoader
-import com.google.android.material.snackbar.Snackbar
 import dagger.hilt.android.AndroidEntryPoint
 import org.koitharu.kotatsu.R
 import org.koitharu.kotatsu.bookmarks.domain.Bookmark
@@ -25,8 +24,7 @@ import org.koitharu.kotatsu.core.ui.BaseFragment
 import org.koitharu.kotatsu.core.ui.list.ListSelectionController
 import org.koitharu.kotatsu.core.ui.list.OnListItemClickListener
 import org.koitharu.kotatsu.core.ui.list.fastscroll.FastScroller
-import org.koitharu.kotatsu.core.ui.util.ReversibleAction
+import org.koitharu.kotatsu.core.ui.util.ReversibleActionObserver
-import org.koitharu.kotatsu.core.ui.util.reverseAsync
 import org.koitharu.kotatsu.core.util.ext.observe
 import org.koitharu.kotatsu.core.util.ext.observeEvent
 import org.koitharu.kotatsu.databinding.FragmentListSimpleBinding
@@ -38,7 +36,6 @@ import org.koitharu.kotatsu.list.ui.adapter.ListStateHolderListener
 import org.koitharu.kotatsu.list.ui.adapter.TypedListSpacingDecoration
 import org.koitharu.kotatsu.list.ui.model.ListHeader
 import org.koitharu.kotatsu.main.ui.owners.AppBarOwner
-import org.koitharu.kotatsu.main.ui.owners.SnackbarOwner
 import org.koitharu.kotatsu.parsers.model.Manga
 import org.koitharu.kotatsu.reader.ui.ReaderActivity
 import javax.inject.Inject
@@ -61,11 +58,17 @@ class BookmarksFragment :
 	private var bookmarksAdapter: BookmarksAdapter? = null
 	private var selectionController: ListSelectionController? = null
 
-	override fun onCreateViewBinding(inflater: LayoutInflater, container: ViewGroup?): FragmentListSimpleBinding {
+	override fun onCreateViewBinding(
+		inflater: LayoutInflater,
+		container: ViewGroup?,
+	): FragmentListSimpleBinding {
 		return FragmentListSimpleBinding.inflate(inflater, container, false)
 	}
 
-	override fun onViewBindingCreated(binding: FragmentListSimpleBinding, savedInstanceState: Bundle?) {
+	override fun onViewBindingCreated(
+		binding: FragmentListSimpleBinding,
+		savedInstanceState: Bundle?,
+	) {
 		super.onViewBindingCreated(binding, savedInstanceState)
 		selectionController = ListSelectionController(
 			activity = requireActivity(),
@@ -95,8 +98,11 @@ class BookmarksFragment :
 		viewModel.content.observe(viewLifecycleOwner) {
 			bookmarksAdapter?.setItems(it, spanSizeLookup)
 		}
-		viewModel.onError.observeEvent(viewLifecycleOwner, SnackbarErrorObserver(binding.recyclerView, this))
+		viewModel.onError.observeEvent(
-		viewModel.onActionDone.observeEvent(viewLifecycleOwner, ::onActionDone)
+			viewLifecycleOwner,
+			SnackbarErrorObserver(binding.recyclerView, this)
+		)
+		viewModel.onActionDone.observeEvent(viewLifecycleOwner, ReversibleActionObserver(binding.recyclerView))
 	}
 
 	override fun onDestroyView() {
@@ -139,12 +145,20 @@ class BookmarksFragment :
 		requireViewBinding().recyclerView.invalidateItemDecorations()
 	}
 
-	override fun onCreateActionMode(controller: ListSelectionController, mode: ActionMode, menu: Menu): Boolean {
+	override fun onCreateActionMode(
+		controller: ListSelectionController,
+		mode: ActionMode,
+		menu: Menu,
+	): Boolean {
 		mode.menuInflater.inflate(R.menu.mode_bookmarks, menu)
 		return true
 	}
 
-	override fun onActionItemClicked(controller: ListSelectionController, mode: ActionMode, item: MenuItem): Boolean {
+	override fun onActionItemClicked(
+		controller: ListSelectionController,
+		mode: ActionMode,
+		item: MenuItem,
+	): Boolean {
 		return when (item.itemId) {
 			R.id.action_remove -> {
 				val ids = selectionController?.snapshot() ?: return false
@@ -167,16 +181,6 @@ class BookmarksFragment :
 		}
 	}
 
-	private fun onActionDone(action: ReversibleAction) {
-		val handle = action.handle
-		val length = if (handle == null) Snackbar.LENGTH_SHORT else Snackbar.LENGTH_LONG
-		val snackbar = Snackbar.make((activity as SnackbarOwner).snackbarHost, action.stringResId, length)
-		if (handle != null) {
-			snackbar.setAction(R.string.undo) { handle.reverseAsync() }
-		}
-		snackbar.show()
-	}
-
 	private inner class SpanSizeLookup : GridLayoutManager.SpanSizeLookup(), Runnable {
 
 		init {
@@ -185,7 +189,8 @@ class BookmarksFragment :
 		}
 
 		override fun getSpanSize(position: Int): Int {
-			val total = (viewBinding?.recyclerView?.layoutManager as? GridLayoutManager)?.spanCount ?: return 1
+			val total = (viewBinding?.recyclerView?.layoutManager as? GridLayoutManager)?.spanCount
+				?: return 1
 			return when (bookmarksAdapter?.getItemViewType(position)) {
 				ListItemType.PAGE_THUMB.ordinal -> 1
 				else -> total
@@ -200,6 +205,12 @@ class BookmarksFragment :
 
 	companion object {
 
+		@Deprecated(
+			"", ReplaceWith(
+				"BookmarksFragment()",
+				"org.koitharu.kotatsu.bookmarks.ui.BookmarksFragment"
+			)
+		)
 		fun newInstance() = BookmarksFragment()
 	}
 }

app/src/main/kotlin/org/koitharu/kotatsu/bookmarks/ui/sheet/BookmarksSheet.kt

@@ -162,7 +162,7 @@ class BookmarksSheet :
 
 		fun show(fm: FragmentManager, manga: Manga) {
 			BookmarksSheet().withArgs(1) {
-				putParcelable(ARG_MANGA, ParcelableManga(manga, withChapters = true))
+				putParcelable(ARG_MANGA, ParcelableManga(manga))
 			}.showDistinct(fm, TAG)
 		}
 	}

app/src/main/kotlin/org/koitharu/kotatsu/bookmarks/ui/sheet/BookmarksSheetViewModel.kt

@@ -35,6 +35,7 @@ class BookmarksSheetViewModel @Inject constructor(
 
 	val content: StateFlow<List<ListModel>> = bookmarksRepository.observeBookmarks(manga)
 		.map { mapList(it) }
+		.withErrorHandling()
 		.stateIn(viewModelScope + Dispatchers.Default, SharingStarted.Lazily, listOf(LoadingFooter()))
 
 	private suspend fun mapList(bookmarks: List<Bookmark>): List<ListModel> {

app/src/main/kotlin/org/koitharu/kotatsu/browser/cloudflare/CloudFlareActivity.kt

@@ -3,6 +3,7 @@ package org.koitharu.kotatsu.browser.cloudflare
 import android.content.Context
 import android.content.Intent
 import android.os.Bundle
+import android.view.Menu
 import android.view.MenuItem
 import android.webkit.CookieManager
 import androidx.activity.result.contract.ActivityResultContract
@@ -11,8 +12,14 @@ import androidx.core.net.toUri
 import androidx.core.view.isInvisible
 import androidx.core.view.isVisible
 import androidx.core.view.updatePadding
+import androidx.lifecycle.lifecycleScope
 import dagger.hilt.android.AndroidEntryPoint
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
+import kotlinx.coroutines.runInterruptible
+import kotlinx.coroutines.yield
 import okhttp3.Headers
+import okhttp3.HttpUrl
 import okhttp3.HttpUrl.Companion.toHttpUrlOrNull
 import org.koitharu.kotatsu.R
 import org.koitharu.kotatsu.browser.WebViewBackPressedCallback
@@ -38,7 +45,13 @@ class CloudFlareActivity : BaseActivity<ActivityBrowserBinding>(), CloudFlareCal
 
 	override fun onCreate(savedInstanceState: Bundle?) {
 		super.onCreate(savedInstanceState)
-		if (!catchingWebViewUnavailability { setContentView(ActivityBrowserBinding.inflate(layoutInflater)) }) {
+		if (!catchingWebViewUnavailability {
+				setContentView(
+					ActivityBrowserBinding.inflate(
+						layoutInflater
+					)
+				)
+			}) {
 			return
 		}
 		supportActionBar?.run {
@@ -86,6 +99,11 @@ class CloudFlareActivity : BaseActivity<ActivityBrowserBinding>(), CloudFlareCal
 		viewBinding.webView.restoreState(savedInstanceState)
 	}
 
+	override fun onCreateOptionsMenu(menu: Menu?): Boolean {
+		menuInflater.inflate(R.menu.opt_captcha, menu)
+		return super.onCreateOptionsMenu(menu)
+	}
+
 	override fun onWindowInsetsChanged(insets: Insets) {
 		viewBinding.appbar.updatePadding(
 			top = insets.top,
@@ -104,6 +122,19 @@ class CloudFlareActivity : BaseActivity<ActivityBrowserBinding>(), CloudFlareCal
 			true
 		}
 
+		R.id.action_retry -> {
+			lifecycleScope.launch {
+				viewBinding.webView.stopLoading()
+				yield()
+				val targetUrl = intent?.dataString?.toHttpUrlOrNull()
+				if (targetUrl != null) {
+					clearCfCookies(targetUrl)
+					viewBinding.webView.loadUrl(targetUrl.toString())
+				}
+			}
+			true
+		}
+
 		else -> super.onOptionsItemSelected(item)
 	}
 
@@ -141,7 +172,15 @@ class CloudFlareActivity : BaseActivity<ActivityBrowserBinding>(), CloudFlareCal
 
 	override fun onTitleChanged(title: CharSequence, subtitle: CharSequence?) {
 		setTitle(title)
-		supportActionBar?.subtitle = subtitle?.toString()?.toHttpUrlOrNull()?.topPrivateDomain() ?: subtitle
+		supportActionBar?.subtitle =
+			subtitle?.toString()?.toHttpUrlOrNull()?.topPrivateDomain() ?: subtitle
+	}
+
+	private suspend fun clearCfCookies(url: HttpUrl) = runInterruptible(Dispatchers.Default) {
+		cookieJar.removeCookies(url) { cookie ->
+			val name = cookie.name
+			name.startsWith("cf_") || name.startsWith("_cf") || name.startsWith("__cf")
+		}
 	}
 
 	class Contract : ActivityResultContract<Pair<String, Headers?>, TaggedActivityResult>() {

app/src/main/kotlin/org/koitharu/kotatsu/core/AppModule.kt

@@ -30,7 +30,8 @@ import org.koitharu.kotatsu.core.cache.ContentCache
 import org.koitharu.kotatsu.core.cache.MemoryContentCache
 import org.koitharu.kotatsu.core.cache.StubContentCache
 import org.koitharu.kotatsu.core.db.MangaDatabase
-import org.koitharu.kotatsu.core.network.*
+import org.koitharu.kotatsu.core.network.ImageProxyInterceptor
+import org.koitharu.kotatsu.core.network.MangaHttpClient
 import org.koitharu.kotatsu.core.os.AppShortcutManager
 import org.koitharu.kotatsu.core.os.NetworkState
 import org.koitharu.kotatsu.core.parser.MangaLoaderContextImpl
@@ -40,7 +41,6 @@ import org.koitharu.kotatsu.core.ui.image.CoilImageGetter
 import org.koitharu.kotatsu.core.ui.util.ActivityRecreationHandle
 import org.koitharu.kotatsu.core.util.AcraScreenLogger
 import org.koitharu.kotatsu.core.util.IncognitoModeIndicator
-import org.koitharu.kotatsu.core.util.ext.activityManager
 import org.koitharu.kotatsu.core.util.ext.connectivityManager
 import org.koitharu.kotatsu.core.util.ext.isLowRamDevice
 import org.koitharu.kotatsu.local.data.CacheDir
@@ -161,7 +161,7 @@ interface AppModule {
 		fun provideContentCache(
 			application: Application,
 		): ContentCache {
-			return if (application.activityManager?.isLowRamDevice == true) {
+			return if (application.isLowRamDevice()) {
 				StubContentCache()
 			} else {
 				MemoryContentCache(application)

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/dao/TagsDao.kt

@@ -51,6 +51,28 @@ abstract class TagsDao {
 	)
 	abstract suspend fun findTags(query: String, limit: Int): List<TagEntity>
 
+	@Query(
+		"""
+		SELECT tags.* FROM manga_tags 
+		LEFT JOIN tags ON tags.tag_id = manga_tags.tag_id 
+		WHERE manga_tags.manga_id IN (SELECT manga_id FROM manga_tags WHERE tag_id = :tagId)
+		GROUP BY tags.tag_id 
+		ORDER BY COUNT(manga_id) DESC;
+	""",
+	)
+	abstract suspend fun findRelatedTags(tagId: Long): List<TagEntity>
+
+	@Query(
+		"""
+		SELECT tags.* FROM manga_tags 
+		LEFT JOIN tags ON tags.tag_id = manga_tags.tag_id 
+		WHERE manga_tags.manga_id IN (SELECT manga_id FROM manga_tags WHERE tag_id IN (:ids))
+		GROUP BY tags.tag_id 
+		ORDER BY COUNT(manga_id) DESC;
+	""",
+	)
+	abstract suspend fun findRelatedTags(ids: Set<Long>): List<TagEntity>
+
 	@Upsert
 	abstract suspend fun upsert(tags: Iterable<TagEntity>)
 }

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

@@ -19,6 +19,8 @@ fun TagEntity.toMangaTag() = MangaTag(
 
 fun Collection<TagEntity>.toMangaTags() = mapToSet(TagEntity::toMangaTag)
 
+fun Collection<TagEntity>.toMangaTagsList() = map(TagEntity::toMangaTag)
+
 fun MangaEntity.toManga(tags: Set<MangaTag>) = Manga(
 	id = this.id,
 	title = this.title,

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/Manga.kt

@@ -17,6 +17,8 @@ fun Collection<Manga>.distinctById() = distinctBy { it.id }
 @JvmName("chaptersIds")
 fun Collection<MangaChapter>.ids() = mapToSet { it.id }
 
+fun Collection<MangaChapter>.findById(id: Long) = find { x -> x.id == id }
+
 fun Collection<ChapterListItem>.countChaptersByBranch(): Int {
 	if (size <= 1) {
 		return size
@@ -30,7 +32,7 @@ fun Collection<ChapterListItem>.countChaptersByBranch(): Int {
 }
 
 fun Manga.findChapter(id: Long): MangaChapter? {
-	return chapters?.find { it.id == id }
+	return chapters?.findById(id)
 }
 
 fun Manga.getPreferredBranch(history: MangaHistory?): String? {
@@ -39,7 +41,7 @@ fun Manga.getPreferredBranch(history: MangaHistory?): String? {
 		return null
 	}
 	if (history != null) {
-		val currentChapter = ch.find { it.id == history.chapterId }
+		val currentChapter = ch.findById(history.chapterId)
 		if (currentChapter != null) {
 			return currentChapter.branch
 		}

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/core/model/parcelable/ParcelableChapter.kt

@@ -0,0 +1,42 @@
+package org.koitharu.kotatsu.core.model.parcelable
+
+import android.os.Parcel
+import android.os.Parcelable
+import kotlinx.parcelize.Parceler
+import kotlinx.parcelize.Parcelize
+import org.koitharu.kotatsu.core.util.ext.readSerializableCompat
+import org.koitharu.kotatsu.parsers.model.MangaChapter
+import org.koitharu.kotatsu.parsers.model.MangaSource
+
+@Parcelize
+data class ParcelableChapter(
+	val chapter: MangaChapter,
+) : Parcelable {
+
+	companion object : Parceler<ParcelableChapter> {
+
+		override fun create(parcel: Parcel) = ParcelableChapter(
+			MangaChapter(
+				id = parcel.readLong(),
+				name = parcel.readString().orEmpty(),
+				number = parcel.readInt(),
+				url = parcel.readString().orEmpty(),
+				scanlator = parcel.readString(),
+				uploadDate = parcel.readLong(),
+				branch = parcel.readString(),
+				source = parcel.readSerializableCompat() ?: MangaSource.DUMMY,
+			)
+		)
+
+		override fun ParcelableChapter.write(parcel: Parcel, flags: Int) = with(chapter) {
+			parcel.writeLong(id)
+			parcel.writeString(name)
+			parcel.writeInt(number)
+			parcel.writeString(url)
+			parcel.writeString(scanlator)
+			parcel.writeLong(uploadDate)
+			parcel.writeString(branch)
+			parcel.writeSerializable(source)
+		}
+	}
+}

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

@@ -9,55 +9,28 @@ import org.koitharu.kotatsu.core.util.ext.readParcelableCompat
 import org.koitharu.kotatsu.core.util.ext.readSerializableCompat
 import org.koitharu.kotatsu.parsers.model.Manga
 
-// Limits to avoid TransactionTooLargeException
-private const val MAX_SAFE_SIZE = 1024 * 100 // Assume that 100 kb is safe parcel size
-private const val MAX_SAFE_CHAPTERS_COUNT = 24 // this is 100% safe
-
 @Parcelize
 data class ParcelableManga(
 	val manga: Manga,
-	private val withChapters: Boolean,
 ) : Parcelable {
-	companion object : Parceler<ParcelableManga> {
-		private fun Manga.writeToParcel(out: Parcel, flags: Int, withChapters: Boolean) {
-			out.writeLong(id)
-			out.writeString(title)
-			out.writeString(altTitle)
-			out.writeString(url)
-			out.writeString(publicUrl)
-			out.writeFloat(rating)
-			ParcelCompat.writeBoolean(out, isNsfw)
-			out.writeString(coverUrl)
-			out.writeString(largeCoverUrl)
-			out.writeString(description)
-			out.writeParcelable(ParcelableMangaTags(tags), flags)
-			out.writeSerializable(state)
-			out.writeString(author)
-			val parcelableChapters = if (withChapters) null else chapters?.let(::ParcelableMangaChapters)
-			out.writeParcelable(parcelableChapters, flags)
-			out.writeSerializable(source)
-		}
 
-		override fun ParcelableManga.write(parcel: Parcel, flags: Int) {
+	companion object : Parceler<ParcelableManga> {
-			val chapters = manga.chapters
+
-			if (!withChapters || chapters == null) {
+		override fun ParcelableManga.write(parcel: Parcel, flags: Int) = with(manga) {
-				manga.writeToParcel(parcel, flags, withChapters = false)
+			parcel.writeLong(id)
-				return
+			parcel.writeString(title)
-			}
+			parcel.writeString(altTitle)
-			if (chapters.size <= MAX_SAFE_CHAPTERS_COUNT) {
+			parcel.writeString(url)
-				// fast path
+			parcel.writeString(publicUrl)
-				manga.writeToParcel(parcel, flags, withChapters = true)
+			parcel.writeFloat(rating)
-				return
+			ParcelCompat.writeBoolean(parcel, isNsfw)
-			}
+			parcel.writeString(coverUrl)
-			val tempParcel = Parcel.obtain()
+			parcel.writeString(largeCoverUrl)
-			manga.writeToParcel(tempParcel, flags, withChapters = true)
+			parcel.writeString(description)
-			val size = tempParcel.dataSize()
+			parcel.writeParcelable(ParcelableMangaTags(tags), flags)
-			if (size < MAX_SAFE_SIZE) {
+			parcel.writeSerializable(state)
-				parcel.appendFrom(tempParcel, 0, size)
+			parcel.writeString(author)
-			} else {
+			parcel.writeSerializable(source)
-				manga.writeToParcel(parcel, flags, withChapters = false)
-			}
-			tempParcel.recycle()
 		}
 
 		override fun create(parcel: Parcel) = ParcelableManga(
@@ -75,10 +48,9 @@ data class ParcelableManga(
 				tags = requireNotNull(parcel.readParcelableCompat<ParcelableMangaTags>()).tags,
 				state = parcel.readSerializableCompat(),
 				author = parcel.readString(),
-				chapters = parcel.readParcelableCompat<ParcelableMangaChapters>()?.chapters,
+				chapters = null,
 				source = requireNotNull(parcel.readSerializableCompat()),
-			),
+			)
-			withChapters = true
 		)
 	}
 }

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

@@ -1,37 +0,0 @@
-package org.koitharu.kotatsu.core.model.parcelable
-
-import android.os.Parcel
-import android.os.Parcelable
-import kotlinx.parcelize.Parceler
-import kotlinx.parcelize.Parcelize
-import kotlinx.parcelize.TypeParceler
-import org.koitharu.kotatsu.core.util.ext.readSerializableCompat
-import org.koitharu.kotatsu.parsers.model.MangaChapter
-
-object MangaChapterParceler : Parceler<MangaChapter> {
-	override fun create(parcel: Parcel) = MangaChapter(
-		id = parcel.readLong(),
-		name = requireNotNull(parcel.readString()),
-		number = parcel.readInt(),
-		url = requireNotNull(parcel.readString()),
-		scanlator = parcel.readString(),
-		uploadDate = parcel.readLong(),
-		branch = parcel.readString(),
-		source = requireNotNull(parcel.readSerializableCompat()),
-	)
-
-	override fun MangaChapter.write(parcel: Parcel, flags: Int) {
-		parcel.writeLong(id)
-		parcel.writeString(name)
-		parcel.writeInt(number)
-		parcel.writeString(url)
-		parcel.writeString(scanlator)
-		parcel.writeLong(uploadDate)
-		parcel.writeString(branch)
-		parcel.writeSerializable(source)
-	}
-}
-
-@Parcelize
-@TypeParceler<MangaChapter, MangaChapterParceler>
-data class ParcelableMangaChapters(val chapters: List<MangaChapter>) : Parcelable

app/src/main/kotlin/org/koitharu/kotatsu/core/network/MirrorSwitchInterceptor.kt

@@ -1,6 +1,9 @@
 package org.koitharu.kotatsu.core.network
 
+import androidx.collection.ArraySet
 import dagger.Lazy
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.runInterruptible
 import okhttp3.Interceptor
 import okhttp3.Request
 import okhttp3.Response
@@ -13,6 +16,7 @@ import org.koitharu.kotatsu.core.parser.MangaRepository
 import org.koitharu.kotatsu.core.parser.RemoteMangaRepository
 import org.koitharu.kotatsu.core.prefs.AppSettings
 import org.koitharu.kotatsu.parsers.model.MangaSource
+import java.util.EnumMap
 import javax.inject.Inject
 import javax.inject.Singleton
 
@@ -22,9 +26,15 @@ class MirrorSwitchInterceptor @Inject constructor(
 	private val settings: AppSettings,
 ) : Interceptor {
 
+	private val locks = EnumMap<MangaSource, Any>(MangaSource::class.java)
+	private val blacklist = EnumMap<MangaSource, MutableSet<String>>(MangaSource::class.java)
+
+	val isEnabled: Boolean
+		get() = settings.isMirrorSwitchingAvailable
+
 	override fun intercept(chain: Interceptor.Chain): Response {
 		val request = chain.request()
-		if (!settings.isMirrorSwitchingAvailable) {
+		if (!isEnabled) {
 			return chain.proceed(request)
 		}
 		return try {
@@ -43,6 +53,30 @@ class MirrorSwitchInterceptor @Inject constructor(
 		}
 	}
 
+	suspend fun trySwitchMirror(repository: RemoteMangaRepository): Boolean = runInterruptible(Dispatchers.Default) {
+		if (!isEnabled) {
+			return@runInterruptible false
+		}
+		val mirrors = repository.getAvailableMirrors()
+		if (mirrors.size <= 1) {
+			return@runInterruptible false
+		}
+		synchronized(obtainLock(repository.source)) {
+			val currentMirror = repository.domain
+			addToBlacklist(repository.source, currentMirror)
+			val newMirror = mirrors.firstOrNull { x ->
+				x != currentMirror && !isBlacklisted(repository.source, x)
+			} ?: return@synchronized false
+			repository.domain = newMirror
+			true
+		}
+	}
+
+	fun rollback(repository: RemoteMangaRepository, oldMirror: String) = synchronized(obtainLock(repository.source)) {
+		blacklist[repository.source]?.remove(oldMirror)
+		repository.domain = oldMirror
+	}
+
 	private fun trySwitchMirror(request: Request, chain: Interceptor.Chain): Response? {
 		val source = request.tag(MangaSource::class.java) ?: return null
 		val repository = mangaRepositoryFactoryLazy.get().create(source) as? RemoteMangaRepository ?: return null
@@ -50,7 +84,9 @@ class MirrorSwitchInterceptor @Inject constructor(
 		if (mirrors.isEmpty()) {
 			return null
 		}
-		return tryMirrors(repository, mirrors, chain, request)
+		return synchronized(obtainLock(repository.source)) {
+			tryMirrors(repository, mirrors, chain, request)
+		}
 	}
 
 	private fun tryMirrors(
@@ -66,7 +102,7 @@ class MirrorSwitchInterceptor @Inject constructor(
 		}
 		val urlBuilder = url.newBuilder()
 		for (mirror in mirrors) {
-			if (mirror == currentDomain) {
+			if (mirror == currentDomain || isBlacklisted(repository.source, mirror)) {
 				continue
 			}
 			val newHost = hostOf(url.host, mirror) ?: continue
@@ -75,6 +111,7 @@ class MirrorSwitchInterceptor @Inject constructor(
 				.build()
 			val response = chain.proceed(newRequest)
 			if (response.isFailed) {
+				addToBlacklist(repository.source, mirror)
 				response.closeQuietly()
 			} else {
 				repository.domain = mirror
@@ -104,4 +141,18 @@ class MirrorSwitchInterceptor @Inject constructor(
 	private fun ResponseBody.copy(): ResponseBody {
 		return source().readByteArray().toResponseBody(contentType())
 	}
+
+	private fun obtainLock(source: MangaSource): Any = locks.getOrPut(source) {
+		Any()
+	}
+
+	private fun isBlacklisted(source: MangaSource, domain: String): Boolean {
+		return blacklist[source]?.contains(domain) == true
+	}
+
+	private fun addToBlacklist(source: MangaSource, domain: String) {
+		blacklist.getOrPut(source) {
+			ArraySet(2)
+		}.add(domain)
+	}
 }

app/src/main/kotlin/org/koitharu/kotatsu/core/network/cookies/AndroidCookieJar.kt

@@ -2,6 +2,7 @@ package org.koitharu.kotatsu.core.network.cookies
 
 import android.webkit.CookieManager
 import androidx.annotation.WorkerThread
+import androidx.core.util.Predicate
 import okhttp3.Cookie
 import okhttp3.HttpUrl
 import org.koitharu.kotatsu.core.util.ext.newBuilder
@@ -31,19 +32,21 @@ class AndroidCookieJar : MutableCookieJar {
 		}
 	}
 
-	override fun removeCookies(url: HttpUrl) {
+	override fun removeCookies(url: HttpUrl, predicate: Predicate<Cookie>?) {
 		val cookies = loadForRequest(url)
 		if (cookies.isEmpty()) {
 			return
 		}
 		val urlString = url.toString()
 		for (c in cookies) {
+			if (predicate != null && !predicate.test(c)) {
+				continue
+			}
 			val nc = c.newBuilder()
 				.expiresAt(System.currentTimeMillis() - 100000)
 				.build()
 			cookieManager.setCookie(urlString, nc.toString())
 		}
-		check(loadForRequest(url).isEmpty())
 	}
 
 	override suspend fun clear() = suspendCoroutine<Boolean> { continuation ->

app/src/main/kotlin/org/koitharu/kotatsu/core/network/cookies/MutableCookieJar.kt

@@ -1,6 +1,7 @@
 package org.koitharu.kotatsu.core.network.cookies
 
 import androidx.annotation.WorkerThread
+import androidx.core.util.Predicate
 import okhttp3.Cookie
 import okhttp3.CookieJar
 import okhttp3.HttpUrl
@@ -14,7 +15,7 @@ interface MutableCookieJar : CookieJar {
 	override fun saveFromResponse(url: HttpUrl, cookies: List<Cookie>)
 
 	@WorkerThread
-	fun removeCookies(url: HttpUrl)
+	fun removeCookies(url: HttpUrl, predicate: Predicate<Cookie>?)
 
 	suspend fun clear(): Boolean
 }

app/src/main/kotlin/org/koitharu/kotatsu/core/network/cookies/PreferencesCookieJar.kt

@@ -4,6 +4,7 @@ import android.content.Context
 import androidx.annotation.WorkerThread
 import androidx.collection.ArrayMap
 import androidx.core.content.edit
+import androidx.core.util.Predicate
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.withContext
 import okhttp3.Cookie
@@ -57,12 +58,14 @@ class PreferencesCookieJar(
 
 	@Synchronized
 	@WorkerThread
-	override fun removeCookies(url: HttpUrl) {
+	override fun removeCookies(url: HttpUrl, predicate: Predicate<Cookie>?) {
 		loadPersistent()
 		val toRemove = HashSet<String>()
 		for ((key, cookie) in cache) {
 			if (cookie.isExpired() || cookie.cookie.matches(url)) {
-				toRemove += key
+				if (predicate == null || predicate.test(cookie.cookie)) {
+					toRemove += key
+				}
 			}
 		}
 		if (toRemove.isNotEmpty()) {

app/src/main/kotlin/org/koitharu/kotatsu/core/os/AppShortcutManager.kt

@@ -21,6 +21,7 @@ import kotlinx.coroutines.launch
 import org.koitharu.kotatsu.R
 import org.koitharu.kotatsu.core.db.TABLE_HISTORY
 import org.koitharu.kotatsu.core.parser.MangaDataRepository
+import org.koitharu.kotatsu.core.parser.favicon.faviconUri
 import org.koitharu.kotatsu.core.prefs.AppSettings
 import org.koitharu.kotatsu.core.ui.image.ThumbnailTransformation
 import org.koitharu.kotatsu.core.util.ext.getDrawableOrThrow
@@ -29,8 +30,10 @@ import org.koitharu.kotatsu.core.util.ext.processLifecycleScope
 import org.koitharu.kotatsu.core.util.ext.source
 import org.koitharu.kotatsu.history.data.HistoryRepository
 import org.koitharu.kotatsu.parsers.model.Manga
+import org.koitharu.kotatsu.parsers.model.MangaSource
 import org.koitharu.kotatsu.parsers.util.runCatchingCancellable
 import org.koitharu.kotatsu.reader.ui.ReaderActivity
+import org.koitharu.kotatsu.search.ui.MangaListActivity
 import javax.inject.Inject
 import javax.inject.Singleton
 
@@ -73,8 +76,18 @@ class AppShortcutManager @Inject constructor(
 		}
 	}
 
-	suspend fun requestPinShortcut(manga: Manga): Boolean {
+	suspend fun requestPinShortcut(manga: Manga): Boolean = try {
-		return ShortcutManagerCompat.requestPinShortcut(context, buildShortcutInfo(manga), null)
+		ShortcutManagerCompat.requestPinShortcut(context, buildShortcutInfo(manga), null)
+	} catch (e: IllegalStateException) {
+		e.printStackTraceDebug()
+		false
+	}
+
+	suspend fun requestPinShortcut(source: MangaSource): Boolean = try {
+		ShortcutManagerCompat.requestPinShortcut(context, buildShortcutInfo(source), null)
+	} catch (e: IllegalStateException) {
+		e.printStackTraceDebug()
+		false
 	}
 
 	@VisibleForTesting
@@ -86,6 +99,11 @@ class AppShortcutManager @Inject constructor(
 		ShortcutManagerCompat.reportShortcutUsed(context, mangaId.toString())
 	}
 
+	fun isDynamicShortcutsAvailable(): Boolean {
+		return Build.VERSION.SDK_INT >= Build.VERSION_CODES.N_MR1 &&
+			context.getSystemService(ShortcutManager::class.java).maxShortcutCountPerActivity > 0
+	}
+
 	private suspend fun updateShortcutsImpl() = runCatchingCancellable {
 		val maxShortcuts = ShortcutManagerCompat.getMaxShortcutCountPerActivity(context).coerceAtLeast(5)
 		val shortcuts = historyRepository.getList(0, maxShortcuts)
@@ -132,8 +150,25 @@ class AppShortcutManager @Inject constructor(
 			.build()
 	}
 
-	fun isDynamicShortcutsAvailable(): Boolean {
+	private suspend fun buildShortcutInfo(source: MangaSource): ShortcutInfoCompat {
-		return Build.VERSION.SDK_INT >= Build.VERSION_CODES.N_MR1 &&
+		val icon = runCatchingCancellable {
-			context.getSystemService(ShortcutManager::class.java).maxShortcutCountPerActivity > 0
+			coil.execute(
+				ImageRequest.Builder(context)
+					.data(source.faviconUri())
+					.size(iconSize)
+					.scale(Scale.FIT)
+					.build(),
+			).getDrawableOrThrow().toBitmap()
+		}.fold(
+			onSuccess = { IconCompat.createWithAdaptiveBitmap(it) },
+			onFailure = { IconCompat.createWithResource(context, R.drawable.ic_shortcut_default) },
+		)
+		return ShortcutInfoCompat.Builder(context, source.name)
+			.setShortLabel(source.title)
+			.setLongLabel(source.title)
+			.setIcon(icon)
+			.setLongLived(true)
+			.setIntent(MangaListActivity.newIntent(context, source))
+			.build()
 	}
 }

app/src/main/kotlin/org/koitharu/kotatsu/core/parser/MangaLoaderContextImpl.kt

@@ -17,7 +17,7 @@ import org.koitharu.kotatsu.parsers.MangaLoaderContext
 import org.koitharu.kotatsu.parsers.config.MangaSourceConfig
 import org.koitharu.kotatsu.parsers.model.MangaSource
 import java.lang.ref.WeakReference
-import java.util.*
+import java.util.Locale
 import javax.inject.Inject
 import javax.inject.Singleton
 import kotlin.coroutines.resume
@@ -50,7 +50,7 @@ class MangaLoaderContextImpl @Inject constructor(
 	}
 
 	override fun encodeBase64(data: ByteArray): String {
-		return Base64.encodeToString(data, Base64.NO_PADDING)
+		return Base64.encodeToString(data, Base64.NO_WRAP)
 	}
 
 	override fun decodeBase64(data: String): ByteArray {

app/src/main/kotlin/org/koitharu/kotatsu/core/parser/MangaRepository.kt

@@ -2,6 +2,7 @@ package org.koitharu.kotatsu.core.parser
 
 import androidx.annotation.AnyThread
 import org.koitharu.kotatsu.core.cache.ContentCache
+import org.koitharu.kotatsu.core.network.MirrorSwitchInterceptor
 import org.koitharu.kotatsu.local.data.LocalMangaRepository
 import org.koitharu.kotatsu.parsers.MangaLoaderContext
 import org.koitharu.kotatsu.parsers.model.Manga
@@ -43,6 +44,7 @@ interface MangaRepository {
 		private val localMangaRepository: LocalMangaRepository,
 		private val loaderContext: MangaLoaderContext,
 		private val contentCache: ContentCache,
+		private val mirrorSwitchInterceptor: MirrorSwitchInterceptor,
 	) {
 
 		private val cache = EnumMap<MangaSource, WeakReference<RemoteMangaRepository>>(MangaSource::class.java)
@@ -55,7 +57,11 @@ interface MangaRepository {
 			cache[source]?.get()?.let { return it }
 			return synchronized(cache) {
 				cache[source]?.get()?.let { return it }
-				val repository = RemoteMangaRepository(MangaParser(source, loaderContext), contentCache)
+				val repository = RemoteMangaRepository(
+					parser = MangaParser(source, loaderContext),
+					cache = contentCache,
+					mirrorSwitchInterceptor = mirrorSwitchInterceptor,
+				)
 				cache[source] = WeakReference(repository)
 				repository
 			}

app/src/main/kotlin/org/koitharu/kotatsu/core/parser/RemoteMangaRepository.kt

@@ -13,11 +13,13 @@ import okhttp3.Response
 import org.koitharu.kotatsu.BuildConfig
 import org.koitharu.kotatsu.core.cache.ContentCache
 import org.koitharu.kotatsu.core.cache.SafeDeferred
+import org.koitharu.kotatsu.core.network.MirrorSwitchInterceptor
 import org.koitharu.kotatsu.core.prefs.SourceSettings
 import org.koitharu.kotatsu.core.util.ext.processLifecycleScope
 import org.koitharu.kotatsu.parsers.MangaParser
 import org.koitharu.kotatsu.parsers.MangaParserAuthProvider
 import org.koitharu.kotatsu.parsers.config.ConfigKey
+import org.koitharu.kotatsu.parsers.exception.ParseException
 import org.koitharu.kotatsu.parsers.model.Favicons
 import org.koitharu.kotatsu.parsers.model.Manga
 import org.koitharu.kotatsu.parsers.model.MangaChapter
@@ -31,6 +33,7 @@ import org.koitharu.kotatsu.parsers.util.runCatchingCancellable
 class RemoteMangaRepository(
 	private val parser: MangaParser,
 	private val cache: ContentCache,
+	private val mirrorSwitchInterceptor: MirrorSwitchInterceptor,
 ) : MangaRepository, Interceptor {
 
 	override val source: MangaSource
@@ -66,11 +69,15 @@ class RemoteMangaRepository(
 	}
 
 	override suspend fun getList(offset: Int, query: String): List<Manga> {
-		return parser.getList(offset, query)
+		return mirrorSwitchInterceptor.withMirrorSwitching {
+			parser.getList(offset, query)
+		}
 	}
 
 	override suspend fun getList(offset: Int, tags: Set<MangaTag>?, sortOrder: SortOrder?): List<Manga> {
-		return parser.getList(offset, tags, sortOrder)
+		return mirrorSwitchInterceptor.withMirrorSwitching {
+			parser.getList(offset, tags, sortOrder)
+		}
 	}
 
 	override suspend fun getDetails(manga: Manga): Manga = getDetails(manga, withCache = true)
@@ -78,17 +85,25 @@ class RemoteMangaRepository(
 	override suspend fun getPages(chapter: MangaChapter): List<MangaPage> {
 		cache.getPages(source, chapter.url)?.let { return it }
 		val pages = asyncSafe {
-			parser.getPages(chapter).distinctById()
+			mirrorSwitchInterceptor.withMirrorSwitching {
+				parser.getPages(chapter).distinctById()
+			}
 		}
 		cache.putPages(source, chapter.url, pages)
 		return pages.await()
 	}
 
-	override suspend fun getPageUrl(page: MangaPage): String = parser.getPageUrl(page)
+	override suspend fun getPageUrl(page: MangaPage): String = mirrorSwitchInterceptor.withMirrorSwitching {
+		parser.getPageUrl(page)
+	}
 
-	override suspend fun getTags(): Set<MangaTag> = parser.getTags()
+	override suspend fun getTags(): Set<MangaTag> = mirrorSwitchInterceptor.withMirrorSwitching {
+		parser.getTags()
+	}
 
-	suspend fun getFavicons(): Favicons = parser.getFavicons()
+	suspend fun getFavicons(): Favicons = mirrorSwitchInterceptor.withMirrorSwitching {
+		parser.getFavicons()
+	}
 
 	override suspend fun getRelated(seed: Manga): List<Manga> {
 		cache.getRelatedManga(source, seed.url)?.let { return it }
@@ -105,7 +120,9 @@ class RemoteMangaRepository(
 		}
 		cache.getDetails(source, manga.url)?.let { return it }
 		val details = asyncSafe {
-			parser.getDetails(manga)
+			mirrorSwitchInterceptor.withMirrorSwitching {
+				parser.getDetails(manga)
+			}
 		}
 		cache.putDetails(source, manga.url, details)
 		return details.await()
@@ -155,4 +172,33 @@ class RemoteMangaRepository(
 		}
 		return result
 	}
+
+	private suspend fun <R> MirrorSwitchInterceptor.withMirrorSwitching(block: suspend () -> R): R {
+		if (!isEnabled) {
+			return block()
+		}
+		val initialMirror = domain
+		val result = runCatchingCancellable {
+			block()
+		}
+		if (result.isValidResult()) {
+			return result.getOrThrow()
+		}
+		return if (trySwitchMirror(this@RemoteMangaRepository)) {
+			val newResult = runCatchingCancellable {
+				block()
+			}
+			if (newResult.isValidResult()) {
+				return newResult.getOrThrow()
+			} else {
+				rollback(this@RemoteMangaRepository, initialMirror)
+				return result.getOrThrow()
+			}
+		} else {
+			result.getOrThrow()
+		}
+	}
+
+	private fun Result<*>.isValidResult() = exceptionOrNull() !is ParseException
+		&& (getOrNull() as? Collection<*>)?.isEmpty() != true
 }

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

@@ -24,6 +24,7 @@ import org.koitharu.kotatsu.core.util.ext.takeIfReadable
 import org.koitharu.kotatsu.core.util.ext.toUriOrNull
 import org.koitharu.kotatsu.history.domain.model.HistoryOrder
 import org.koitharu.kotatsu.parsers.model.SortOrder
+import org.koitharu.kotatsu.parsers.util.find
 import org.koitharu.kotatsu.parsers.util.mapNotNullToSet
 import org.koitharu.kotatsu.parsers.util.mapToSet
 import java.io.File
@@ -43,7 +44,8 @@ class AppSettings @Inject constructor(@ApplicationContext context: Context) {
 		set(value) = prefs.edit { putEnumValue(KEY_LIST_MODE, value) }
 
 	val theme: Int
-		get() = prefs.getString(KEY_THEME, null)?.toIntOrNull() ?: AppCompatDelegate.MODE_NIGHT_FOLLOW_SYSTEM
+		get() = prefs.getString(KEY_THEME, null)?.toIntOrNull()
+			?: AppCompatDelegate.MODE_NIGHT_FOLLOW_SYSTEM
 
 	val colorScheme: ColorScheme
 		get() = prefs.getEnumValue(KEY_COLOR_THEME, ColorScheme.default)
@@ -51,8 +53,20 @@ class AppSettings @Inject constructor(@ApplicationContext context: Context) {
 	val isAmoledTheme: Boolean
 		get() = prefs.getBoolean(KEY_THEME_AMOLED, false)
 
-	val isFavoritesNavItemFirst: Boolean
+	var mainNavItems: List<NavItem>
-		get() = (prefs.getString(KEY_FIRST_NAV_ITEM, null)?.toIntOrNull() ?: 0) == 1
+		get() {
+			val raw = prefs.getString(KEY_NAV_MAIN, null)?.split(',')
+			return if (raw.isNullOrEmpty()) {
+				listOf(NavItem.HISTORY, NavItem.FAVORITES, NavItem.EXPLORE, NavItem.FEED)
+			} else {
+				raw.mapNotNull { x -> NavItem.entries.find(x) }.ifEmpty { listOf(NavItem.EXPLORE) }
+			}
+		}
+		set(value) {
+			prefs.edit {
+				putString(KEY_NAV_MAIN, value.joinToString(",") { it.name })
+			}
+		}
 
 	var gridSize: Int
 		get() = prefs.getInt(KEY_GRID_SIZE, 100)
@@ -76,6 +90,9 @@ class AppSettings @Inject constructor(@ApplicationContext context: Context) {
 	val readerPageSwitch: Set<String>
 		get() = prefs.getStringSet(KEY_READER_SWITCHERS, null) ?: setOf(PAGE_SWITCH_TAPS)
 
+	val isReaderZoomButtonsEnabled: Boolean
+		get() = prefs.getBoolean(KEY_READER_ZOOM_BUTTONS, false)
+
 	val isReaderTapsAdaptive: Boolean
 		get() = !prefs.getBoolean(KEY_READER_TAPS_LTR, false)
 
@@ -145,7 +162,11 @@ class AppSettings @Inject constructor(@ApplicationContext context: Context) {
 
 	var appPassword: String?
 		get() = prefs.getString(KEY_APP_PASSWORD, null)
-		set(value) = prefs.edit { if (value != null) putString(KEY_APP_PASSWORD, value) else remove(KEY_APP_PASSWORD) }
+		set(value) = prefs.edit {
+			if (value != null) putString(KEY_APP_PASSWORD, value) else remove(
+				KEY_APP_PASSWORD,
+			)
+		}
 
 	val isLoggingEnabled: Boolean
 		get() = prefs.getBoolean(KEY_LOGGING_ENABLED, false)
@@ -171,7 +192,8 @@ class AppSettings @Inject constructor(@ApplicationContext context: Context) {
 			if (isBackgroundNetworkRestricted()) {
 				return false
 			}
-			val policy = NetworkPolicy.from(prefs.getString(KEY_PREFETCH_CONTENT, null), NetworkPolicy.NEVER)
+			val policy =
+				NetworkPolicy.from(prefs.getString(KEY_PREFETCH_CONTENT, null), NetworkPolicy.NEVER)
 			return policy.isNetworkAllowed(connectivityManager)
 		}
 
@@ -248,6 +270,9 @@ class AppSettings @Inject constructor(@ApplicationContext context: Context) {
 	val isReaderSliderEnabled: Boolean
 		get() = prefs.getBoolean(KEY_READER_SLIDER, true)
 
+	val isReaderKeepScreenOn: Boolean
+		get() = prefs.getBoolean(KEY_READER_SCREEN_ON, true)
+
 	val isImagesProxyEnabled: Boolean
 		get() = prefs.getBoolean(KEY_IMAGES_PROXY, false)
 
@@ -292,14 +317,22 @@ class AppSettings @Inject constructor(@ApplicationContext context: Context) {
 	@get:FloatRange(from = 0.0, to = 1.0)
 	var readerAutoscrollSpeed: Float
 		get() = prefs.getFloat(KEY_READER_AUTOSCROLL_SPEED, 0f)
-		set(@FloatRange(from = 0.0, to = 1.0) value) = prefs.edit { putFloat(KEY_READER_AUTOSCROLL_SPEED, value) }
+		set(@FloatRange(from = 0.0, to = 1.0) value) = prefs.edit {
+			putFloat(
+				KEY_READER_AUTOSCROLL_SPEED,
+				value,
+			)
+		}
 
 	val isPagesPreloadEnabled: Boolean
 		get() {
 			if (isBackgroundNetworkRestricted()) {
 				return false
 			}
-			val policy = NetworkPolicy.from(prefs.getString(KEY_PAGES_PRELOAD, null), NetworkPolicy.NON_METERED)
+			val policy = NetworkPolicy.from(
+				prefs.getString(KEY_PAGES_PRELOAD, null),
+				NetworkPolicy.NON_METERED,
+			)
 			return policy.isNetworkAllowed(connectivityManager)
 		}
 
@@ -382,6 +415,7 @@ class AppSettings @Inject constructor(@ApplicationContext context: Context) {
 		const val KEY_REMOTE_SOURCES = "remote_sources"
 		const val KEY_LOCAL_STORAGE = "local_storage"
 		const val KEY_READER_SWITCHERS = "reader_switchers"
+		const val KEY_READER_ZOOM_BUTTONS = "reader_zoom_buttons"
 		const val KEY_TRACKER_ENABLED = "tracker_enabled"
 		const val KEY_TRACKER_WIFI_ONLY = "tracker_wifi"
 		const val KEY_TRACK_SOURCES = "track_sources"
@@ -429,6 +463,7 @@ class AppSettings @Inject constructor(@ApplicationContext context: Context) {
 		const val KEY_READER_BAR = "reader_bar"
 		const val KEY_READER_SLIDER = "reader_slider"
 		const val KEY_READER_BACKGROUND = "reader_background"
+		const val KEY_READER_SCREEN_ON = "reader_screen_on"
 		const val KEY_SHORTCUTS = "dynamic_shortcuts"
 		const val KEY_READER_TAPS_LTR = "reader_taps_ltr"
 		const val KEY_LOCAL_LIST_ORDER = "local_order"
@@ -455,7 +490,7 @@ class AppSettings @Inject constructor(@ApplicationContext context: Context) {
 		const val KEY_LOCAL_MANGA_DIRS = "local_manga_dirs"
 		const val KEY_DISABLE_NSFW = "no_nsfw"
 		const val KEY_RELATED_MANGA = "related_manga"
-		const val KEY_FIRST_NAV_ITEM = "nav_first"
+		const val KEY_NAV_MAIN = "nav_main"
 
 		// About
 		const val KEY_APP_UPDATE = "app_update"

app/src/main/kotlin/org/koitharu/kotatsu/core/prefs/NavItem.kt

@@ -0,0 +1,33 @@
+package org.koitharu.kotatsu.core.prefs
+
+import androidx.annotation.DrawableRes
+import androidx.annotation.IdRes
+import androidx.annotation.StringRes
+import org.koitharu.kotatsu.R
+import org.koitharu.kotatsu.list.ui.model.ListModel
+
+enum class NavItem(
+	@IdRes val id: Int,
+	@StringRes val title: Int,
+	@DrawableRes val icon: Int,
+) : ListModel {
+
+	HISTORY(R.id.nav_history, R.string.history, R.drawable.ic_history_selector),
+	FAVORITES(R.id.nav_favorites, R.string.favourites, R.drawable.ic_favourites_selector),
+	LOCAL(R.id.nav_local, R.string.on_device, R.drawable.ic_storage_selector),
+	EXPLORE(R.id.nav_explore, R.string.explore, R.drawable.ic_explore_selector),
+	SUGGESTIONS(R.id.nav_suggestions, R.string.suggestions, R.drawable.ic_suggestion_selector),
+	FEED(R.id.nav_feed, R.string.feed, R.drawable.ic_feed_selector),
+	BOOKMARKS(R.id.nav_bookmarks, R.string.bookmarks, R.drawable.ic_bookmark_selector),
+	;
+
+	override fun areItemsTheSame(other: ListModel): Boolean {
+		return other is NavItem && ordinal == other.ordinal
+	}
+
+	fun isAvailable(settings: AppSettings): Boolean = when (this) {
+		SUGGESTIONS -> settings.isSuggestionsEnabled
+		FEED -> settings.isTrackerEnabled
+		else -> true
+	}
+}

app/src/main/kotlin/org/koitharu/kotatsu/core/ui/BaseFullscreenActivity.kt

@@ -5,20 +5,19 @@ import android.os.Build
 import android.os.Bundle
 import android.view.WindowManager
 import androidx.core.content.ContextCompat
-import androidx.core.view.WindowInsetsCompat
-import androidx.core.view.WindowInsetsControllerCompat
 import androidx.viewbinding.ViewBinding
 import org.koitharu.kotatsu.R
+import org.koitharu.kotatsu.core.ui.util.SystemUiController
 
 abstract class BaseFullscreenActivity<B : ViewBinding> :
 	BaseActivity<B>() {
 
-	private lateinit var insetsControllerCompat: WindowInsetsControllerCompat
+	protected lateinit var systemUiController: SystemUiController
 
 	override fun onCreate(savedInstanceState: Bundle?) {
 		super.onCreate(savedInstanceState)
 		with(window) {
-			insetsControllerCompat = WindowInsetsControllerCompat(this, decorView)
+			systemUiController = SystemUiController(this)
 			statusBarColor = Color.TRANSPARENT
 			navigationBarColor = if (Build.VERSION.SDK_INT < Build.VERSION_CODES.M) {
 				ContextCompat.getColor(this@BaseFullscreenActivity, R.color.dim)
@@ -30,15 +29,7 @@ abstract class BaseFullscreenActivity<B : ViewBinding> :
 					WindowManager.LayoutParams.LAYOUT_IN_DISPLAY_CUTOUT_MODE_SHORT_EDGES
 			}
 		}
-		insetsControllerCompat.systemBarsBehavior = WindowInsetsControllerCompat.BEHAVIOR_SHOW_TRANSIENT_BARS_BY_SWIPE
+		// insetsControllerCompat.systemBarsBehavior = WindowInsetsControllerCompat.BEHAVIOR_SHOW_TRANSIENT_BARS_BY_SWIPE
-		showSystemUI()
+		systemUiController.setSystemUiVisible(true)
-	}
-
-	protected fun hideSystemUI() {
-		insetsControllerCompat.hide(WindowInsetsCompat.Type.systemBars())
-	}
-
-	protected fun showSystemUI() {
-		insetsControllerCompat.show(WindowInsetsCompat.Type.systemBars())
 	}
 }

app/src/main/kotlin/org/koitharu/kotatsu/core/ui/list/fastscroll/FastScroller.kt

@@ -19,13 +19,13 @@ import androidx.coordinatorlayout.widget.CoordinatorLayout
 import androidx.core.content.ContextCompat
 import androidx.core.content.withStyledAttributes
 import androidx.core.view.GravityCompat
+import androidx.core.view.ancestors
 import androidx.core.view.isGone
 import androidx.core.view.isVisible
 import androidx.recyclerview.widget.RecyclerView
 import org.koitharu.kotatsu.R
 import org.koitharu.kotatsu.core.util.ext.getThemeColor
 import org.koitharu.kotatsu.core.util.ext.isLayoutReversed
-import org.koitharu.kotatsu.core.util.ext.parents
 import org.koitharu.kotatsu.databinding.FastScrollerBinding
 import kotlin.math.roundToInt
 import com.google.android.material.R as materialR
@@ -522,7 +522,7 @@ class FastScroller @JvmOverloads constructor(
 		return BubbleSize.entries.getOrNull(ordinal) ?: defaultValue
 	}
 
-	private fun findValidParent(view: View): ViewGroup? = view.parents.firstNotNullOfOrNull { p ->
+	private fun findValidParent(view: View): ViewGroup? = view.ancestors.firstNotNullOfOrNull { p ->
 		if (p is FrameLayout || p is ConstraintLayout || p is CoordinatorLayout || p is RelativeLayout) {
 			p as ViewGroup
 		} else {

app/src/main/kotlin/org/koitharu/kotatsu/core/ui/sheet/AdaptiveSheetBehavior.kt

@@ -104,6 +104,7 @@ sealed class AdaptiveSheetBehavior {
 	companion object {
 
 		const val STATE_EXPANDED = SideSheetBehavior.STATE_EXPANDED
+		const val STATE_COLLAPSED = BottomSheetBehavior.STATE_COLLAPSED
 		const val STATE_SETTLING = SideSheetBehavior.STATE_SETTLING
 		const val STATE_DRAGGING = SideSheetBehavior.STATE_DRAGGING
 		const val STATE_HIDDEN = SideSheetBehavior.STATE_HIDDEN
@@ -114,10 +115,11 @@ sealed class AdaptiveSheetBehavior {
 			else -> null
 		}
 
-		fun from(lp: CoordinatorLayout.LayoutParams): AdaptiveSheetBehavior? = when (val behavior = lp.behavior) {
+		fun from(lp: CoordinatorLayout.LayoutParams): AdaptiveSheetBehavior? =
-			is BottomSheetBehavior<*> -> Bottom(behavior)
+			when (val behavior = lp.behavior) {
-			is SideSheetBehavior<*> -> Side(behavior)
+				is BottomSheetBehavior<*> -> Bottom(behavior)
-			else -> null
+				is SideSheetBehavior<*> -> Side(behavior)
-		}
+				else -> null
+			}
 	}
 }

app/src/main/kotlin/org/koitharu/kotatsu/core/ui/sheet/AdaptiveSheetHeaderBar.kt

@@ -2,17 +2,19 @@ package org.koitharu.kotatsu.core.ui.sheet
 
 import android.content.Context
 import android.util.AttributeSet
+import android.view.InputDevice
 import android.view.LayoutInflater
+import android.view.MotionEvent
 import android.view.View
 import android.widget.LinearLayout
 import androidx.annotation.AttrRes
 import androidx.annotation.StringRes
 import androidx.coordinatorlayout.widget.CoordinatorLayout
 import androidx.core.content.withStyledAttributes
+import androidx.core.view.ancestors
 import androidx.core.view.isGone
 import androidx.core.view.isVisible
 import org.koitharu.kotatsu.R
-import org.koitharu.kotatsu.core.util.ext.parents
 import org.koitharu.kotatsu.databinding.LayoutSheetHeaderAdaptiveBinding
 
 class AdaptiveSheetHeaderBar @JvmOverloads constructor(
@@ -21,7 +23,8 @@ class AdaptiveSheetHeaderBar @JvmOverloads constructor(
 	@AttrRes defStyleAttr: Int = 0,
 ) : LinearLayout(context, attrs, defStyleAttr), AdaptiveSheetCallback {
 
-	private val binding = LayoutSheetHeaderAdaptiveBinding.inflate(LayoutInflater.from(context), this)
+	private val binding =
+		LayoutSheetHeaderAdaptiveBinding.inflate(LayoutInflater.from(context), this)
 	private var sheetBehavior: AdaptiveSheetBehavior? = null
 
 	var title: CharSequence?
@@ -60,6 +63,28 @@ class AdaptiveSheetHeaderBar @JvmOverloads constructor(
 		super.onDetachedFromWindow()
 	}
 
+	override fun onGenericMotionEvent(event: MotionEvent): Boolean {
+		val behavior = sheetBehavior ?: return super.onGenericMotionEvent(event)
+		if (event.source and InputDevice.SOURCE_CLASS_POINTER != 0) {
+			if (event.actionMasked == MotionEvent.ACTION_SCROLL) {
+				if (event.getAxisValue(MotionEvent.AXIS_VSCROLL) < 0f) {
+					behavior.state = if (
+						behavior is AdaptiveSheetBehavior.Bottom
+						&& behavior.state == AdaptiveSheetBehavior.STATE_EXPANDED
+					) {
+						AdaptiveSheetBehavior.STATE_COLLAPSED
+					} else {
+						AdaptiveSheetBehavior.STATE_HIDDEN
+					}
+				} else {
+					behavior.state = AdaptiveSheetBehavior.STATE_EXPANDED
+				}
+				return true
+			}
+		}
+		return super.onGenericMotionEvent(event)
+	}
+
 	override fun onStateChanged(sheet: View, newState: Int) {
 
 	}
@@ -81,14 +106,9 @@ class AdaptiveSheetHeaderBar @JvmOverloads constructor(
 	}
 
 	private fun findParentSheetBehavior(): AdaptiveSheetBehavior? {
-		for (p in parents) {
+		return ancestors.firstNotNullOfOrNull {
-			val layoutParams = (p as? View)?.layoutParams
+			((it as? View)?.layoutParams as? CoordinatorLayout.LayoutParams)
-			if (layoutParams is CoordinatorLayout.LayoutParams) {
+				?.let { params -> AdaptiveSheetBehavior.from(params) }
-				AdaptiveSheetBehavior.from(layoutParams)?.let {
-					return it
-				}
-			}
 		}
-		return null
 	}
 }

app/src/main/kotlin/org/koitharu/kotatsu/core/ui/util/SystemUiController.kt

@@ -0,0 +1,60 @@
+package org.koitharu.kotatsu.core.ui.util
+
+import android.os.Build
+import android.view.View
+import android.view.Window
+import android.view.WindowInsets
+import android.view.WindowInsetsController
+import androidx.annotation.RequiresApi
+
+sealed class SystemUiController(
+	protected val window: Window,
+) {
+
+	abstract fun setSystemUiVisible(value: Boolean)
+
+	@RequiresApi(Build.VERSION_CODES.S)
+	private class Api30Impl(window: Window) : SystemUiController(window) {
+
+		private val insetsController = checkNotNull(window.decorView.windowInsetsController)
+
+		override fun setSystemUiVisible(value: Boolean) {
+			if (value) {
+				insetsController.show(WindowInsets.Type.systemBars())
+				insetsController.systemBarsBehavior = WindowInsetsController.BEHAVIOR_DEFAULT
+			} else {
+				insetsController.systemBarsBehavior = WindowInsetsController.BEHAVIOR_SHOW_TRANSIENT_BARS_BY_SWIPE
+				insetsController.hide(WindowInsets.Type.systemBars())
+			}
+		}
+	}
+
+	@Suppress("DEPRECATION")
+	private class LegacyImpl(window: Window) : SystemUiController(window) {
+
+		override fun setSystemUiVisible(value: Boolean) {
+			window.decorView.systemUiVisibility = if (value) {
+				View.SYSTEM_UI_FLAG_LAYOUT_STABLE or
+						View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION or
+						View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
+			} else {
+				View.SYSTEM_UI_FLAG_LAYOUT_STABLE or
+						View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION or
+						View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN or
+						View.SYSTEM_UI_FLAG_HIDE_NAVIGATION or
+						View.SYSTEM_UI_FLAG_FULLSCREEN or
+						View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY
+			}
+		}
+	}
+
+	companion object {
+
+		operator fun invoke(window: Window): SystemUiController =
+			if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S) {
+				Api30Impl(window)
+			} else {
+				LegacyImpl(window)
+			}
+	}
+}

app/src/main/kotlin/org/koitharu/kotatsu/core/ui/widgets/EnhancedViewPager.kt

@@ -5,6 +5,7 @@ import android.content.Context
 import android.util.AttributeSet
 import android.view.MotionEvent
 import androidx.viewpager.widget.ViewPager
+import org.koitharu.kotatsu.core.util.ext.printStackTraceDebug
 
 @SuppressLint("ClickableViewAccessibility")
 class EnhancedViewPager @JvmOverloads constructor(
@@ -25,6 +26,11 @@ class EnhancedViewPager @JvmOverloads constructor(
 	}
 
 	override fun onInterceptTouchEvent(event: MotionEvent): Boolean {
-		return isUserInputEnabled && super.onInterceptTouchEvent(event)
+		return try {
+			isUserInputEnabled && super.onInterceptTouchEvent(event)
+		} catch (e: IllegalArgumentException) {
+			e.printStackTraceDebug()
+			false
+		}
 	}
 }

app/src/main/kotlin/org/koitharu/kotatsu/core/ui/widgets/SlidingBottomNavigationView.kt

@@ -65,6 +65,9 @@ class SlidingBottomNavigationView @JvmOverloads constructor(
 	}
 
 	fun show() {
+		if (currentState == STATE_UP) {
+			return
+		}
 		currentAnimator?.cancel()
 		clearAnimation()
 
@@ -77,6 +80,9 @@ class SlidingBottomNavigationView @JvmOverloads constructor(
 	}
 
 	fun hide() {
+		if (currentState == STATE_DOWN) {
+			return
+		}
 		currentAnimator?.cancel()
 		clearAnimation()
 
@@ -117,6 +123,7 @@ class SlidingBottomNavigationView @JvmOverloads constructor(
 	}
 
 	internal class SavedState : AbsSavedState {
+
 		var currentState = STATE_UP
 		var translationY = 0F
 

app/src/main/kotlin/org/koitharu/kotatsu/core/ui/widgets/ZoomControl.kt

@@ -0,0 +1,38 @@
+package org.koitharu.kotatsu.core.ui.widgets
+
+import android.content.Context
+import android.util.AttributeSet
+import android.view.LayoutInflater
+import android.view.View
+import android.widget.LinearLayout
+import org.koitharu.kotatsu.R
+import org.koitharu.kotatsu.databinding.ViewZoomBinding
+
+class ZoomControl @JvmOverloads constructor(
+	context: Context,
+	attrs: AttributeSet? = null,
+) : LinearLayout(context, attrs), View.OnClickListener {
+
+	private val binding = ViewZoomBinding.inflate(LayoutInflater.from(context), this)
+
+	var listener: ZoomControlListener? = null
+
+	init {
+		binding.buttonZoomIn.setOnClickListener(this)
+		binding.buttonZoomOut.setOnClickListener(this)
+	}
+
+	override fun onClick(v: View) {
+		when (v.id) {
+			R.id.button_zoom_in -> listener?.onZoomIn()
+			R.id.button_zoom_out -> listener?.onZoomOut()
+		}
+	}
+
+	interface ZoomControlListener {
+
+		fun onZoomIn()
+
+		fun onZoomOut()
+	}
+}

app/src/main/kotlin/org/koitharu/kotatsu/core/util/ext/File.kt

@@ -16,8 +16,10 @@ import org.koitharu.kotatsu.R
 import org.koitharu.kotatsu.core.fs.FileSequence
 import java.io.File
 import java.io.FileFilter
+import java.nio.file.attribute.BasicFileAttributes
 import java.util.zip.ZipEntry
 import java.util.zip.ZipFile
+import kotlin.io.path.readAttributes
 
 fun File.subdir(name: String) = File(this, name).also {
 	if (!it.exists()) it.mkdirs()
@@ -99,3 +101,10 @@ private suspend fun SequenceScope<File>.listFilesRecursiveImpl(root: File, filte
 fun File.children() = FileSequence(this)
 
 fun Sequence<File>.filterWith(filter: FileFilter): Sequence<File> = filter { f -> filter.accept(f) }
+
+val File.creationTime
+	get() = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+		toPath().readAttributes<BasicFileAttributes>().creationTime().toMillis()
+	} else {
+		lastModified()
+	}

app/src/main/kotlin/org/koitharu/kotatsu/core/util/ext/Flow.kt

@@ -5,6 +5,8 @@ import kotlinx.coroutines.delay
 import kotlinx.coroutines.flow.Flow
 import kotlinx.coroutines.flow.StateFlow
 import kotlinx.coroutines.flow.combine
+import kotlinx.coroutines.flow.first
+import kotlinx.coroutines.flow.firstOrNull
 import kotlinx.coroutines.flow.flow
 import kotlinx.coroutines.flow.map
 import kotlinx.coroutines.flow.onCompletion
@@ -72,7 +74,7 @@ fun <T1, T2, T3, T4, T5, T6, R> combine(
 	flow4: Flow<T4>,
 	flow5: Flow<T5>,
 	flow6: Flow<T6>,
-	transform: suspend (T1, T2, T3, T4, T5, T6) -> R
+	transform: suspend (T1, T2, T3, T4, T5, T6) -> R,
 ): Flow<R> = combine(flow, flow2, flow3, flow4, flow5, flow6) { args: Array<*> ->
 	transform(
 		args[0] as T1,
@@ -83,3 +85,7 @@ fun <T1, T2, T3, T4, T5, T6, R> combine(
 		args[5] as T6,
 	)
 }
+
+suspend fun <T : Any> Flow<T?>.firstNotNull(): T = checkNotNull(first { x -> x != null })
+
+suspend fun <T : Any> Flow<T?>.firstNotNullOrNull(): T? = firstOrNull { x -> x != null }

app/src/main/kotlin/org/koitharu/kotatsu/core/util/ext/Throwable.kt

@@ -27,6 +27,7 @@ import java.net.SocketTimeoutException
 import java.net.UnknownHostException
 
 private const val MSG_NO_SPACE_LEFT = "No space left on device"
+private const val IMAGE_FORMAT_NO_SUPPORTED = "Image format not supported"
 
 fun Throwable.getDisplayMessage(resources: Resources): String = when (this) {
 	is AuthRequiredException -> resources.getString(R.string.auth_required)
@@ -81,6 +82,7 @@ private fun getHttpDisplayMessage(statusCode: Int, resources: Resources): String
 private fun getDisplayMessage(msg: String?, resources: Resources): String? = when {
 	msg.isNullOrEmpty() -> null
 	msg.contains(MSG_NO_SPACE_LEFT) -> resources.getString(R.string.error_no_space_left)
+	msg.contains(IMAGE_FORMAT_NO_SUPPORTED) -> resources.getString(R.string.error_corrupted_file)
 	else -> null
 }
 

app/src/main/kotlin/org/koitharu/kotatsu/core/util/ext/View.kt

@@ -2,16 +2,18 @@ package org.koitharu.kotatsu.core.util.ext
 
 import android.app.Activity
 import android.graphics.Rect
+import android.os.Build
 import android.view.View
 import android.view.View.MeasureSpec
 import android.view.ViewGroup
-import android.view.ViewParent
 import android.view.inputmethod.InputMethodManager
 import android.widget.Checkable
-import android.widget.CompoundButton
 import androidx.core.view.children
+import androidx.core.view.descendants
+import androidx.core.view.isVisible
 import androidx.recyclerview.widget.RecyclerView
 import androidx.viewpager2.widget.ViewPager2
+import com.google.android.material.progressindicator.BaseProgressIndicator
 import com.google.android.material.slider.Slider
 import com.google.android.material.tabs.TabLayout
 import kotlin.math.roundToInt
@@ -88,23 +90,8 @@ fun Slider.setValueRounded(newValue: Float) {
 	value = roundedValue.coerceIn(valueFrom, valueTo)
 }
 
-fun <T : View> ViewGroup.findViewsByType(clazz: Class<T>): Sequence<T> {
-	if (childCount == 0) {
-		return emptySequence()
-	}
-	return sequence {
-		for (view in children) {
-			if (clazz.isInstance(view)) {
-				yield(clazz.cast(view)!!)
-			} else if (view is ViewGroup && view.childCount != 0) {
-				yieldAll(view.findViewsByType(clazz))
-			}
-		}
-	}
-}
-
 fun RecyclerView.invalidateNestedItemDecorations() {
-	findViewsByType(RecyclerView::class.java).forEach {
+	descendants.filterIsInstance<RecyclerView>().forEach {
 		it.invalidateItemDecorations()
 	}
 }
@@ -112,15 +99,6 @@ fun RecyclerView.invalidateNestedItemDecorations() {
 val View.parentView: ViewGroup?
 	get() = parent as? ViewGroup
 
-val View.parents: Sequence<ViewParent>
-	get() = sequence {
-		var p: ViewParent? = parent
-		while (p != null) {
-			yield(p)
-			p = p.parent
-		}
-	}
-
 fun View.measureDimension(desiredSize: Int, measureSpec: Int): Int {
 	var result: Int
 	val specMode = MeasureSpec.getMode(measureSpec)
@@ -155,3 +133,17 @@ fun TabLayout.setTabsEnabled(enabled: Boolean) {
 		getTabAt(i)?.view?.isEnabled = enabled
 	}
 }
+
+fun BaseProgressIndicator<*>.showOrHide(value: Boolean) {
+	if (value) {
+		if (!isVisible) show()
+	} else {
+		if (isVisible) hide()
+	}
+}
+
+fun View.setOnContextClickListenerCompat(listener: View.OnLongClickListener) {
+	if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
+		setOnContextClickListener(listener::onLongClick)
+	}
+}

app/src/main/kotlin/org/koitharu/kotatsu/details/domain/DoubleMangaLoadUseCase.kt

@@ -1,8 +1,11 @@
 package org.koitharu.kotatsu.details.domain
 
 import kotlinx.coroutines.Dispatchers
-import kotlinx.coroutines.async
+import kotlinx.coroutines.flow.Flow
-import kotlinx.coroutines.coroutineScope
+import kotlinx.coroutines.flow.combine
+import kotlinx.coroutines.flow.flatMapLatest
+import kotlinx.coroutines.flow.flow
+import kotlinx.coroutines.flow.flowOn
 import org.koitharu.kotatsu.core.model.isLocal
 import org.koitharu.kotatsu.core.parser.MangaDataRepository
 import org.koitharu.kotatsu.core.parser.MangaIntent
@@ -23,24 +26,28 @@ class DoubleMangaLoadUseCase @Inject constructor(
 	private val recoverUseCase: RecoverMangaUseCase,
 ) {
 
-	suspend operator fun invoke(manga: Manga): DoubleManga = coroutineScope {
+	operator fun invoke(manga: Manga): Flow<DoubleManga> = flow {
-		val remoteDeferred = async(Dispatchers.Default) { loadRemote(manga) }
+		var lastValue: DoubleManga? = null
-		val localDeferred = async(Dispatchers.Default) { loadLocal(manga) }
+		var emitted = false
-		DoubleManga(
+		invokeImpl(manga).collect {
-			remoteManga = remoteDeferred.await(),
+			lastValue = it
-			localManga = localDeferred.await(),
+			if (it.any != null) {
-		)
+				emitted = true
-	}
+				emit(it)
+			}
+		}
+		if (!emitted) {
+			lastValue?.requireAny()
+		}
+	}.flowOn(Dispatchers.Default)
 
-	suspend operator fun invoke(mangaId: Long): DoubleManga {
+	operator fun invoke(mangaId: Long): Flow<DoubleManga> = flow {
-		val manga = mangaDataRepository.findMangaById(mangaId) ?: throwNFE()
+		emit(mangaDataRepository.findMangaById(mangaId) ?: throwNFE())
-		return invoke(manga)
+	}.flatMapLatest { invoke(it) }
-	}
 
-	suspend operator fun invoke(intent: MangaIntent): DoubleManga {
+	operator fun invoke(intent: MangaIntent): Flow<DoubleManga> = flow {
-		val manga = mangaDataRepository.resolveIntent(intent) ?: throwNFE()
+		emit(mangaDataRepository.resolveIntent(intent) ?: throwNFE())
-		return invoke(manga)
+	}.flatMapLatest { invoke(it) }
-	}
 
 	private suspend fun loadLocal(manga: Manga): Result<Manga>? {
 		return runCatchingCancellable {
@@ -70,5 +77,15 @@ class DoubleMangaLoadUseCase @Inject constructor(
 		}
 	}
 
+	private fun invokeImpl(manga: Manga): Flow<DoubleManga> = combine(
+		flow { emit(null); emit(loadRemote(manga)) },
+		flow { emit(null); emit(loadLocal(manga)) },
+	) { remote, local ->
+		DoubleManga(
+			remoteManga = remote,
+			localManga = local,
+		)
+	}
+
 	private fun throwNFE(): Nothing = throw NotFoundException("Cannot find manga", "")
 }

app/src/main/kotlin/org/koitharu/kotatsu/details/domain/model/DoubleManga.kt

@@ -1,5 +1,6 @@
 package org.koitharu.kotatsu.details.domain.model
 
+import org.koitharu.kotatsu.core.model.findById
 import org.koitharu.kotatsu.parsers.model.Manga
 import org.koitharu.kotatsu.parsers.model.MangaChapter
 import org.koitharu.kotatsu.parsers.model.MangaSource
@@ -34,6 +35,10 @@ data class DoubleManga(
 		mergeChapters()
 	}
 
+	fun hasChapter(id: Long): Boolean {
+		return local?.chapters?.findById(id) != null || remote?.chapters?.findById(id) != null
+	}
+
 	fun requireAny(): Manga {
 		val result = remoteManga?.getOrNull() ?: localManga?.getOrNull()
 		if (result != null) {

app/src/main/kotlin/org/koitharu/kotatsu/details/service/MangaPrefetchService.kt

@@ -5,8 +5,9 @@ import android.content.Intent
 import dagger.hilt.android.AndroidEntryPoint
 import dagger.hilt.android.EntryPointAccessors
 import org.koitharu.kotatsu.core.cache.ContentCache
+import org.koitharu.kotatsu.core.model.findById
+import org.koitharu.kotatsu.core.model.parcelable.ParcelableChapter
 import org.koitharu.kotatsu.core.model.parcelable.ParcelableManga
-import org.koitharu.kotatsu.core.model.parcelable.ParcelableMangaChapters
 import org.koitharu.kotatsu.core.parser.MangaRepository
 import org.koitharu.kotatsu.core.ui.CoroutineIntentService
 import org.koitharu.kotatsu.core.util.ext.getParcelableExtraCompat
@@ -34,12 +35,13 @@ class MangaPrefetchService : CoroutineIntentService() {
 	override suspend fun processIntent(startId: Int, intent: Intent) {
 		when (intent.action) {
 			ACTION_PREFETCH_DETAILS -> prefetchDetails(
-				manga = intent.getParcelableExtraCompat<ParcelableManga>(EXTRA_MANGA)?.manga ?: return,
+				manga = intent.getParcelableExtraCompat<ParcelableManga>(EXTRA_MANGA)?.manga
+					?: return,
 			)
 
 			ACTION_PREFETCH_PAGES -> prefetchPages(
-				chapter = intent.getParcelableExtraCompat<ParcelableMangaChapters>(EXTRA_CHAPTER)
+				chapter = intent.getParcelableExtraCompat<ParcelableChapter>(EXTRA_CHAPTER)?.chapter
-					?.chapters?.singleOrNull() ?: return,
+					?: return,
 			)
 
 			ACTION_PREFETCH_LAST -> prefetchLast()
@@ -71,7 +73,7 @@ class MangaPrefetchService : CoroutineIntentService() {
 		val chapter = if (history == null) {
 			chapters.firstOrNull()
 		} else {
-			chapters.find { x -> x.id == history.chapterId } ?: chapters.firstOrNull()
+			chapters.findById(history.chapterId) ?: chapters.firstOrNull()
 		} ?: return
 		runCatchingCancellable { repo.getPages(chapter) }
 	}
@@ -88,7 +90,7 @@ class MangaPrefetchService : CoroutineIntentService() {
 			if (!isPrefetchAvailable(context, manga.source)) return
 			val intent = Intent(context, MangaPrefetchService::class.java)
 			intent.action = ACTION_PREFETCH_DETAILS
-			intent.putExtra(EXTRA_MANGA, ParcelableManga(manga, withChapters = false))
+			intent.putExtra(EXTRA_MANGA, ParcelableManga(manga))
 			context.startService(intent)
 		}
 
@@ -96,7 +98,7 @@ class MangaPrefetchService : CoroutineIntentService() {
 			if (!isPrefetchAvailable(context, chapter.source)) return
 			val intent = Intent(context, MangaPrefetchService::class.java)
 			intent.action = ACTION_PREFETCH_PAGES
-			intent.putExtra(EXTRA_CHAPTER, ParcelableMangaChapters(listOf(chapter)))
+			intent.putExtra(EXTRA_CHAPTER, ParcelableChapter(chapter))
 			try {
 				context.startService(intent)
 			} catch (e: IllegalStateException) {
@@ -119,7 +121,10 @@ class MangaPrefetchService : CoroutineIntentService() {
 			if (context.isPowerSaveMode()) {
 				return false
 			}
-			val entryPoint = EntryPointAccessors.fromApplication(context, PrefetchCompanionEntryPoint::class.java)
+			val entryPoint = EntryPointAccessors.fromApplication(
+				context,
+				PrefetchCompanionEntryPoint::class.java,
+			)
 			return entryPoint.contentCache.isCachingEnabled && entryPoint.settings.isContentPrefetchEnabled
 		}
 	}

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

@@ -1,5 +1,7 @@
 package org.koitharu.kotatsu.details.ui
 
+import android.view.InputDevice
+import android.view.MotionEvent
 import android.view.View
 import android.view.View.OnLayoutChangeListener
 import androidx.activity.OnBackPressedCallback
@@ -12,7 +14,7 @@ class ChaptersBottomSheetMediator(
 	private val behavior: BottomSheetBehavior<*>,
 ) : OnBackPressedCallback(false),
 	ActionModeListener,
-	OnLayoutChangeListener {
+	OnLayoutChangeListener, View.OnGenericMotionListener {
 
 	private var lockCounter = 0
 
@@ -55,6 +57,20 @@ class ChaptersBottomSheetMediator(
 		}
 	}
 
+	override fun onGenericMotion(v: View?, event: MotionEvent): Boolean {
+		if (event.source and InputDevice.SOURCE_CLASS_POINTER != 0) {
+			if (event.actionMasked == MotionEvent.ACTION_SCROLL) {
+				if (event.getAxisValue(MotionEvent.AXIS_VSCROLL) < 0f) {
+					behavior.state = BottomSheetBehavior.STATE_COLLAPSED
+				} else {
+					behavior.state = BottomSheetBehavior.STATE_EXPANDED
+				}
+				return true
+			}
+		}
+		return false
+	}
+
 	fun lock() {
 		lockCounter++
 		behavior.isDraggable = lockCounter <= 0

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

@@ -49,6 +49,7 @@ import org.koitharu.kotatsu.core.util.ext.observe
 import org.koitharu.kotatsu.core.util.ext.observeEvent
 import org.koitharu.kotatsu.core.util.ext.setNavigationBarTransparentCompat
 import org.koitharu.kotatsu.core.util.ext.setNavigationIconSafe
+import org.koitharu.kotatsu.core.util.ext.setOnContextClickListenerCompat
 import org.koitharu.kotatsu.core.util.ext.textAndVisible
 import org.koitharu.kotatsu.databinding.ActivityDetailsBinding
 import org.koitharu.kotatsu.details.service.MangaPrefetchService
@@ -89,6 +90,7 @@ class DetailsActivity :
 		}
 		viewBinding.buttonRead.setOnClickListener(this)
 		viewBinding.buttonRead.setOnLongClickListener(this)
+		viewBinding.buttonRead.setOnContextClickListenerCompat(this)
 		viewBinding.buttonDropdown.setOnClickListener(this)
 		viewBadge = ViewBadge(viewBinding.buttonRead, this)
 
@@ -103,6 +105,7 @@ class DetailsActivity :
 			viewBinding.toolbarChapters?.setNavigationOnClickListener {
 				behavior.state = BottomSheetBehavior.STATE_COLLAPSED
 			}
+			viewBinding.toolbarChapters?.setOnGenericMotionListener(bsMediator)
 		} else {
 			chaptersMenuProvider = ChaptersMenuProvider(viewModel, null)
 			addMenuProvider(chaptersMenuProvider)
@@ -134,13 +137,19 @@ class DetailsActivity :
 			viewBinding.toolbarChapters?.subtitle = it
 			viewBinding.textViewSubtitle?.textAndVisible = it
 		}
-		viewModel.isChaptersReversed.observe(this, MenuInvalidator(viewBinding.toolbarChapters ?: this))
+		viewModel.isChaptersReversed.observe(
+			this,
+			MenuInvalidator(viewBinding.toolbarChapters ?: this)
+		)
 		viewModel.favouriteCategories.observe(this, MenuInvalidator(this))
 		viewModel.branches.observe(this) {
 			viewBinding.buttonDropdown.isVisible = it.size > 1
 		}
 		viewModel.chapters.observe(this, PrefetchObserver(this))
-		viewModel.onDownloadStarted.observeEvent(this, DownloadStartedObserver(viewBinding.containerDetails))
+		viewModel.onDownloadStarted.observeEvent(
+			this,
+			DownloadStartedObserver(viewBinding.containerDetails)
+		)
 
 		addMenuProvider(
 			DetailsMenuProvider(
@@ -243,7 +252,11 @@ class DetailsActivity :
 			right = insets.right,
 		)
 		if (insets.bottom > 0) {
-			window.setNavigationBarTransparentCompat(this, viewBinding.layoutBottom?.elevation ?: 0f, 0.9f)
+			window.setNavigationBarTransparentCompat(
+				this,
+				viewBinding.layoutBottom?.elevation ?: 0f,
+				0.9f
+			)
 		}
 		viewBinding.cardChapters?.updateLayoutParams<MarginLayoutParams> {
 			bottomMargin = insets.bottom + marginEnd
@@ -265,9 +278,18 @@ class DetailsActivity :
 		}
 		val text = when {
 			!info.isValid -> getString(R.string.loading_)
-			info.currentChapter >= 0 -> getString(R.string.chapter_d_of_d, info.currentChapter + 1, info.totalChapters)
+			info.currentChapter >= 0 -> getString(
+				R.string.chapter_d_of_d,
+				info.currentChapter + 1,
+				info.totalChapters
+			)
+
 			info.totalChapters == 0 -> getString(R.string.no_chapters)
-			else -> resources.getQuantityString(R.plurals.chapters, info.totalChapters, info.totalChapters)
+			else -> resources.getQuantityString(
+				R.plurals.chapters,
+				info.totalChapters,
+				info.totalChapters
+			)
 		}
 		viewBinding.toolbarChapters?.title = text
 		viewBinding.textViewTitle?.text = text
@@ -286,7 +308,12 @@ class DetailsActivity :
 				append(' ')
 				append(' ')
 				inSpans(
-					ForegroundColorSpan(v.context.getThemeColor(android.R.attr.textColorSecondary, Color.LTGRAY)),
+					ForegroundColorSpan(
+						v.context.getThemeColor(
+							android.R.attr.textColorSecondary,
+							Color.LTGRAY
+						)
+					),
 					RelativeSizeSpan(0.74f),
 				) {
 					append(branch.count.toString())
@@ -305,7 +332,8 @@ class DetailsActivity :
 		val manga = viewModel.manga.value ?: return
 		val chapterId = viewModel.historyInfo.value.history?.chapterId
 		if (chapterId != null && manga.chapters?.none { x -> x.id == chapterId } == true) {
-			val snackbar = makeSnackbar(getString(R.string.chapter_is_missing), Snackbar.LENGTH_SHORT)
+			val snackbar =
+				makeSnackbar(getString(R.string.chapter_is_missing), Snackbar.LENGTH_SHORT)
 			snackbar.show()
 		} else {
 			startActivity(
@@ -331,7 +359,10 @@ class DetailsActivity :
 		view.isVisible = isVisible
 	}
 
-	private fun makeSnackbar(text: CharSequence, @BaseTransientBottomBar.Duration duration: Int): Snackbar {
+	private fun makeSnackbar(
+		text: CharSequence,
+		@BaseTransientBottomBar.Duration duration: Int,
+	): Snackbar {
 		val sb = Snackbar.make(viewBinding.containerDetails, text, duration)
 		if (viewBinding.layoutBottom?.isVisible == true) {
 			sb.anchorView = viewBinding.toolbarChapters
@@ -369,7 +400,7 @@ class DetailsActivity :
 
 		fun newIntent(context: Context, manga: Manga): Intent {
 			return Intent(context, DetailsActivity::class.java)
-				.putExtra(MangaIntent.KEY_MANGA, ParcelableManga(manga, withChapters = true))
+				.putExtra(MangaIntent.KEY_MANGA, ParcelableManga(manga))
 		}
 
 		fun newIntent(context: Context, mangaId: Long): Intent {

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

@@ -43,6 +43,7 @@ import org.koitharu.kotatsu.core.util.ext.observe
 import org.koitharu.kotatsu.core.util.ext.parentView
 import org.koitharu.kotatsu.core.util.ext.resolveDp
 import org.koitharu.kotatsu.core.util.ext.scaleUpActivityOptionsOf
+import org.koitharu.kotatsu.core.util.ext.showOrHide
 import org.koitharu.kotatsu.core.util.ext.textAndVisible
 import org.koitharu.kotatsu.databinding.FragmentDetailsBinding
 import org.koitharu.kotatsu.details.ui.model.ChapterListItem
@@ -159,21 +160,22 @@ class DetailsFragment :
 			}
 
 			when (manga.state) {
-				MangaState.FINISHED -> {
+				MangaState.FINISHED -> infoLayout.textViewState.apply {
-					infoLayout.textViewState.apply {
+					textAndVisible = resources.getString(R.string.state_finished)
-						textAndVisible = resources.getString(R.string.state_finished)
+					drawableTop = ContextCompat.getDrawable(context, R.drawable.ic_state_finished)
-						drawableTop = ContextCompat.getDrawable(context, R.drawable.ic_state_finished)
-					}
 				}
 
-				MangaState.ONGOING -> {
+				MangaState.ONGOING -> infoLayout.textViewState.apply {
-					infoLayout.textViewState.apply {
+					textAndVisible = resources.getString(R.string.state_ongoing)
-						textAndVisible = resources.getString(R.string.state_ongoing)
+					drawableTop = ContextCompat.getDrawable(context, R.drawable.ic_state_ongoing)
-						drawableTop = ContextCompat.getDrawable(context, R.drawable.ic_state_ongoing)
-					}
 				}
 
-				else -> infoLayout.textViewState.isVisible = false
+				MangaState.ABANDONED -> infoLayout.textViewState.apply {
+					textAndVisible = resources.getString(R.string.state_abandoned)
+					drawableTop = ContextCompat.getDrawable(context, R.drawable.ic_state_abandoned)
+				}
+
+				null -> infoLayout.textViewState.isVisible = false
 			}
 			if (manga.source == MangaSource.LOCAL) {
 				infoLayout.textViewSource.isVisible = false
@@ -247,11 +249,7 @@ class DetailsFragment :
 	}
 
 	private fun onLoadingStateChanged(isLoading: Boolean) {
-		if (isLoading) {
+		requireViewBinding().progressBar.showOrHide(isLoading)
-			requireViewBinding().progressBar.show()
-		} else {
-			requireViewBinding().progressBar.hide()
-		}
 	}
 
 	private fun onBookmarksChanged(bookmarks: List<Bookmark>) {

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

@@ -42,6 +42,7 @@ import org.koitharu.kotatsu.core.util.ext.MutableEventFlow
 import org.koitharu.kotatsu.core.util.ext.call
 import org.koitharu.kotatsu.core.util.ext.combine
 import org.koitharu.kotatsu.core.util.ext.computeSize
+import org.koitharu.kotatsu.core.util.ext.onFirst
 import org.koitharu.kotatsu.core.util.ext.requireValue
 import org.koitharu.kotatsu.core.util.ext.sanitize
 import org.koitharu.kotatsu.core.util.ext.toFileOrNull
@@ -87,7 +88,8 @@ class DetailsViewModel @Inject constructor(
 
 	private val intent = MangaIntent(savedStateHandle)
 	private val mangaId = intent.mangaId
-	private val doubleManga: MutableStateFlow<DoubleManga?> = MutableStateFlow(intent.manga?.let { DoubleManga(it) })
+	private val doubleManga: MutableStateFlow<DoubleManga?> =
+		MutableStateFlow(intent.manga?.let { DoubleManga(it) })
 	private var loadingJob: Job
 
 	val onShowToast = MutableEventFlow<Int>()
@@ -202,7 +204,14 @@ class DetailsViewModel @Inject constructor(
 			bookmarks,
 			networkState,
 		) { manga, history, branch, news, bookmarks, isOnline ->
-			mapChapters(manga?.remote?.takeIf { isOnline }, manga?.local, history, news, branch, bookmarks)
+			mapChapters(
+				manga?.remote?.takeIf { isOnline },
+				manga?.local,
+				history,
+				news,
+				branch,
+				bookmarks,
+			)
 		},
 		isChaptersReversed,
 		chaptersQuery,
@@ -324,12 +333,15 @@ class DetailsViewModel @Inject constructor(
 	}
 
 	private fun doLoad() = launchLoadingJob(Dispatchers.Default) {
-		val result = doubleMangaLoadUseCase(intent)
+		doubleMangaLoadUseCase.invoke(intent)
-		val manga = result.requireAny()
+			.onFirst {
-		// find default branch
+				val manga = it.requireAny()
-		val hist = historyRepository.getOne(manga)
+				// find default branch
-		selectedBranch.value = manga.getPreferredBranch(hist)
+				val hist = historyRepository.getOne(manga)
-		doubleManga.value = result
+				selectedBranch.value = manga.getPreferredBranch(hist)
+			}.collect {
+				doubleManga.value = it
+			}
 	}
 
 	private fun List<ChapterListItem>.filterSearch(query: String): List<ChapterListItem> {

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

@@ -45,6 +45,6 @@ class RelatedMangaActivity : BaseActivity<ActivityContainerBinding>(), AppBarOwn
 	companion object {
 
 		fun newIntent(context: Context, seed: Manga) = Intent(context, RelatedMangaActivity::class.java)
-			.putExtra(MangaIntent.KEY_MANGA, ParcelableManga(seed, withChapters = false))
+			.putExtra(MangaIntent.KEY_MANGA, ParcelableManga(seed))
 	}
 }

app/src/main/kotlin/org/koitharu/kotatsu/explore/data/MangaSourcesRepository.kt

@@ -3,6 +3,7 @@ package org.koitharu.kotatsu.explore.data
 import androidx.room.withTransaction
 import dagger.Reusable
 import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.combine
 import kotlinx.coroutines.flow.distinctUntilChanged
 import kotlinx.coroutines.flow.flatMapLatest
 import kotlinx.coroutines.flow.map
@@ -11,12 +12,12 @@ import org.koitharu.kotatsu.core.db.MangaDatabase
 import org.koitharu.kotatsu.core.db.dao.MangaSourcesDao
 import org.koitharu.kotatsu.core.db.entity.MangaSourceEntity
 import org.koitharu.kotatsu.core.model.MangaSource
+import org.koitharu.kotatsu.core.model.isNsfw
 import org.koitharu.kotatsu.core.prefs.AppSettings
 import org.koitharu.kotatsu.core.prefs.observeAsFlow
 import org.koitharu.kotatsu.core.ui.util.ReversibleHandle
 import org.koitharu.kotatsu.parsers.model.ContentType
 import org.koitharu.kotatsu.parsers.model.MangaSource
-import org.koitharu.kotatsu.parsers.util.move
 import java.util.Collections
 import java.util.EnumSet
 import javax.inject.Inject
@@ -76,14 +77,6 @@ class MangaSourcesRepository @Inject constructor(
 		}
 	}
 
-	suspend fun setSourcesEnabled(sources: Iterable<MangaSource>, isEnabled: Boolean) {
-		db.withTransaction {
-			for (s in sources) {
-				dao.setEnabled(s.name, isEnabled)
-			}
-		}
-	}
-
 	suspend fun disableAllSources() {
 		db.withTransaction {
 			assimilateNewSources()
@@ -99,46 +92,20 @@ class MangaSourcesRepository @Inject constructor(
 		}
 	}
 
-	suspend fun setPosition(source: MangaSource, index: Int) {
+	fun observeNewSources(): Flow<Set<MangaSource>> = combine(
-		db.withTransaction {
+		dao.observeAll(),
-			val all = dao.findAll().toMutableList()
+		observeIsNsfwDisabled(),
-			val sourceIndex = all.indexOfFirst { x -> x.source == source.name }
+	) { entities, skipNsfw ->
-			if (sourceIndex !in all.indices) {
-				val entity = MangaSourceEntity(
-					source = source.name,
-					isEnabled = false,
-					sortKey = index,
-				)
-				all.add(index, entity)
-				dao.upsert(entity)
-			} else {
-				all.move(sourceIndex, index)
-			}
-			for ((i, e) in all.withIndex()) {
-				if (e.sortKey != i) {
-					dao.setSortKey(e.source, i)
-				}
-			}
-		}
-	}
-
-	fun observeNewSources(): Flow<Set<MangaSource>> = dao.observeAll().map { entities ->
 		val result = EnumSet.copyOf(remoteSources)
 		for (e in entities) {
 			result.remove(MangaSource(e.source))
 		}
+		if (skipNsfw) {
+			result.removeAll { x -> x.isNsfw() }
+		}
 		result
 	}.distinctUntilChanged()
 
-	suspend fun getNewSources(): Set<MangaSource> {
-		val entities = dao.findAll()
-		val result = EnumSet.copyOf(remoteSources)
-		for (e in entities) {
-			result.remove(MangaSource(e.source))
-		}
-		return result
-	}
-
 	suspend fun assimilateNewSources(): Set<MangaSource> {
 		val new = getNewSources()
 		if (new.isEmpty()) {
@@ -153,6 +120,9 @@ class MangaSourcesRepository @Inject constructor(
 			)
 		}
 		dao.insertIfAbsent(entities)
+		if (settings.isNsfwContentDisabled) {
+			new.removeAll { x -> x.isNsfw() }
+		}
 		return new
 	}
 
@@ -160,6 +130,15 @@ class MangaSourcesRepository @Inject constructor(
 		return dao.findAll().isEmpty()
 	}
 
+	private suspend fun getNewSources(): MutableSet<MangaSource> {
+		val entities = dao.findAll()
+		val result = EnumSet.copyOf(remoteSources)
+		for (e in entities) {
+			result.remove(MangaSource(e.source))
+		}
+		return result
+	}
+
 	private fun List<MangaSourceEntity>.toSources(skipNsfwSources: Boolean): List<MangaSource> {
 		val result = ArrayList<MangaSource>(size)
 		for (entity in this) {

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

@@ -7,6 +7,7 @@ import android.view.MenuItem
 import android.view.View
 import android.view.ViewGroup
 import androidx.appcompat.widget.PopupMenu
+import androidx.core.content.pm.ShortcutManagerCompat
 import androidx.core.graphics.Insets
 import androidx.core.view.updatePadding
 import androidx.fragment.app.viewModels
@@ -15,9 +16,11 @@ import androidx.recyclerview.widget.LinearLayoutManager
 import androidx.recyclerview.widget.RecyclerView
 import coil.ImageLoader
 import dagger.hilt.android.AndroidEntryPoint
+import kotlinx.coroutines.launch
 import org.koitharu.kotatsu.R
 import org.koitharu.kotatsu.bookmarks.ui.BookmarksActivity
 import org.koitharu.kotatsu.core.exceptions.resolve.SnackbarErrorObserver
+import org.koitharu.kotatsu.core.os.AppShortcutManager
 import org.koitharu.kotatsu.core.ui.BaseFragment
 import org.koitharu.kotatsu.core.ui.dialog.TwoButtonsAlertDialog
 import org.koitharu.kotatsu.core.ui.list.OnListItemClickListener
@@ -28,6 +31,7 @@ import org.koitharu.kotatsu.core.ui.widgets.TipView
 import org.koitharu.kotatsu.core.util.ext.addMenuProvider
 import org.koitharu.kotatsu.core.util.ext.observe
 import org.koitharu.kotatsu.core.util.ext.observeEvent
+import org.koitharu.kotatsu.core.util.ext.viewLifecycleScope
 import org.koitharu.kotatsu.databinding.FragmentExploreBinding
 import org.koitharu.kotatsu.details.ui.DetailsActivity
 import org.koitharu.kotatsu.download.ui.list.DownloadsActivity
@@ -55,6 +59,9 @@ class ExploreFragment :
 	@Inject
 	lateinit var coil: ImageLoader
 
+	@Inject
+	lateinit var shortcutManager: AppShortcutManager
+
 	private val viewModel by viewModels<ExploreViewModel>()
 	private var exploreAdapter: ExploreAdapter? = null
 
@@ -141,6 +148,8 @@ class ExploreFragment :
 	override fun onItemLongClick(item: MangaSourceItem, view: View): Boolean {
 		val menu = PopupMenu(view.context, view)
 		menu.inflate(R.menu.popup_source)
+		menu.menu.findItem(R.id.action_shortcut)
+			?.isVisible = ShortcutManagerCompat.isRequestPinShortcutSupported(view.context)
 		menu.setOnMenuItemClickListener(SourceMenuListener(item))
 		menu.show()
 		return true
@@ -195,6 +204,12 @@ class ExploreFragment :
 					viewModel.hideSource(sourceItem.source)
 				}
 
+				R.id.action_shortcut -> {
+					viewLifecycleScope.launch {
+						shortcutManager.requestPinShortcut(sourceItem.source)
+					}
+				}
+
 				else -> return false
 			}
 			return true

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

@@ -16,6 +16,7 @@ import org.koitharu.kotatsu.core.util.ext.enqueueWith
 import org.koitharu.kotatsu.core.util.ext.getThemeColor
 import org.koitharu.kotatsu.core.util.ext.newImageRequest
 import org.koitharu.kotatsu.core.util.ext.resolveDp
+import org.koitharu.kotatsu.core.util.ext.setOnContextClickListenerCompat
 import org.koitharu.kotatsu.core.util.ext.source
 import org.koitharu.kotatsu.core.util.ext.textAndVisible
 import org.koitharu.kotatsu.databinding.ItemExploreButtonsBinding
@@ -44,7 +45,12 @@ fun exploreButtonsAD(
 		if (item.isRandomLoading) {
 			val icon = CircularProgressDrawable(context)
 			icon.strokeWidth = context.resources.resolveDp(2f)
-			icon.setColorSchemeColors(context.getThemeColor(materialR.attr.colorPrimary, Color.DKGRAY))
+			icon.setColorSchemeColors(
+				context.getThemeColor(
+					materialR.attr.colorPrimary,
+					Color.DKGRAY
+				)
+			)
 			binding.buttonRandom.icon = icon
 			icon.start()
 		} else {
@@ -88,7 +94,13 @@ fun exploreSourceListItemAD(
 	listener: OnListItemClickListener<MangaSourceItem>,
 	lifecycleOwner: LifecycleOwner,
 ) = adapterDelegateViewBinding<MangaSourceItem, ListModel, ItemExploreSourceListBinding>(
-	{ layoutInflater, parent -> ItemExploreSourceListBinding.inflate(layoutInflater, parent, false) },
+	{ layoutInflater, parent ->
+		ItemExploreSourceListBinding.inflate(
+			layoutInflater,
+			parent,
+			false
+		)
+	},
 	on = { item, _, _ -> item is MangaSourceItem && !item.isGrid },
 ) {
 
@@ -96,6 +108,7 @@ fun exploreSourceListItemAD(
 
 	binding.root.setOnClickListener(eventListener)
 	binding.root.setOnLongClickListener(eventListener)
+	binding.root.setOnContextClickListenerCompat(eventListener)
 
 	bind {
 		binding.textViewTitle.text = item.source.title
@@ -115,7 +128,13 @@ fun exploreSourceGridItemAD(
 	listener: OnListItemClickListener<MangaSourceItem>,
 	lifecycleOwner: LifecycleOwner,
 ) = adapterDelegateViewBinding<MangaSourceItem, ListModel, ItemExploreSourceGridBinding>(
-	{ layoutInflater, parent -> ItemExploreSourceGridBinding.inflate(layoutInflater, parent, false) },
+	{ layoutInflater, parent ->
+		ItemExploreSourceGridBinding.inflate(
+			layoutInflater,
+			parent,
+			false
+		)
+	},
 	on = { item, _, _ -> item is MangaSourceItem && item.isGrid },
 ) {
 
@@ -123,6 +142,7 @@ fun exploreSourceGridItemAD(
 
 	binding.root.setOnClickListener(eventListener)
 	binding.root.setOnLongClickListener(eventListener)
+	binding.root.setOnContextClickListenerCompat(eventListener)
 
 	bind {
 		binding.textViewTitle.text = item.source.title

app/src/main/kotlin/org/koitharu/kotatsu/favourites/ui/categories/FavouriteCategoriesActivity.kt

@@ -67,7 +67,7 @@ class FavouriteCategoriesActivity :
 			attachToRecyclerView(viewBinding.recyclerView)
 		}
 
-		viewModel.categories.observe(this, ::onCategoriesChanged)
+		viewModel.content.observe(this, ::onCategoriesChanged)
 		viewModel.onError.observeEvent(this, SnackbarErrorObserver(viewBinding.recyclerView, null))
 	}
 

app/src/main/kotlin/org/koitharu/kotatsu/favourites/ui/categories/FavouritesCategoriesViewModel.kt

@@ -1,21 +1,23 @@
 package org.koitharu.kotatsu.favourites.ui.categories
 
-import androidx.lifecycle.viewModelScope
 import dagger.hilt.android.lifecycle.HiltViewModel
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.Job
-import kotlinx.coroutines.flow.SharingStarted
+import kotlinx.coroutines.cancelAndJoin
-import kotlinx.coroutines.flow.map
+import kotlinx.coroutines.delay
-import kotlinx.coroutines.flow.stateIn
+import kotlinx.coroutines.flow.MutableStateFlow
-import kotlinx.coroutines.plus
+import kotlinx.coroutines.flow.collectLatest
+import kotlinx.coroutines.yield
 import org.koitharu.kotatsu.R
 import org.koitharu.kotatsu.core.model.FavouriteCategory
 import org.koitharu.kotatsu.core.prefs.AppSettings
 import org.koitharu.kotatsu.core.ui.BaseViewModel
 import org.koitharu.kotatsu.core.util.ext.requireValue
 import org.koitharu.kotatsu.favourites.domain.FavouritesRepository
+import org.koitharu.kotatsu.favourites.domain.model.Cover
 import org.koitharu.kotatsu.favourites.ui.categories.adapter.CategoryListModel
 import org.koitharu.kotatsu.list.ui.model.EmptyState
+import org.koitharu.kotatsu.list.ui.model.ListModel
 import org.koitharu.kotatsu.list.ui.model.LoadingState
 import org.koitharu.kotatsu.parsers.util.move
 import javax.inject.Inject
@@ -26,28 +28,19 @@ class FavouritesCategoriesViewModel @Inject constructor(
 	private val settings: AppSettings,
 ) : BaseViewModel() {
 
-	private var reorderJob: Job? = null
+	private var commitJob: Job? = null
 
-	val categories = repository.observeCategoriesWithCovers()
+	val content = MutableStateFlow<List<ListModel>>(listOf(LoadingState))
-		.map { list ->
+
-			list.map { (category, covers) ->
+	init {
-				CategoryListModel(
+		launchJob(Dispatchers.Default) {
-					mangaCount = covers.size,
+			repository.observeCategoriesWithCovers()
-					covers = covers.take(3),
+				.collectLatest {
-					category = category,
+					commitJob?.join()
-					isTrackerEnabled = settings.isTrackerEnabled && AppSettings.TRACK_FAVOURITES in settings.trackSources,
+					updateContent(it)
-				)
+				}
-			}.ifEmpty {
+		}
-				listOf(
+	}
-					EmptyState(
-						icon = R.drawable.ic_empty_favourites,
-						textPrimary = R.string.text_empty_holder_primary,
-						textSecondary = R.string.empty_favourite_categories,
-						actionStringRes = 0,
-					),
-				)
-			}
-		}.stateIn(viewModelScope + Dispatchers.Default, SharingStarted.Eagerly, listOf(LoadingState))
 
 	fun deleteCategories(ids: Set<Long>) {
 		launchJob(Dispatchers.Default) {
@@ -59,19 +52,13 @@ class FavouritesCategoriesViewModel @Inject constructor(
 		settings.isAllFavouritesVisible = isVisible
 	}
 
-	fun isEmpty(): Boolean = categories.value.none { it is CategoryListModel }
+	fun isEmpty(): Boolean = content.value.none { it is CategoryListModel }
 
 	fun reorderCategories(oldPos: Int, newPos: Int) {
-		val prevJob = reorderJob
+		val snapshot = content.requireValue().toMutableList()
-		reorderJob = launchJob(Dispatchers.Default) {
+		snapshot.move(oldPos, newPos)
-			prevJob?.join()
+		content.value = snapshot
-			val snapshot = categories.requireValue().toMutableList()
+		commit(snapshot)
-			snapshot.move(oldPos, newPos)
-			val ids = snapshot.mapNotNullTo(ArrayList(snapshot.size)) {
-				(it as? CategoryListModel)?.category?.id
-			}
-			repository.reorderCategories(ids)
-		}
 	}
 
 	fun setIsVisible(ids: Set<Long>, isVisible: Boolean) {
@@ -83,9 +70,42 @@ class FavouritesCategoriesViewModel @Inject constructor(
 	}
 
 	fun getCategories(ids: Set<Long>): ArrayList<FavouriteCategory> {
-		val items = categories.requireValue()
+		val items = content.requireValue()
 		return items.mapNotNullTo(ArrayList(ids.size)) { item ->
 			(item as? CategoryListModel)?.category?.takeIf { it.id in ids }
 		}
 	}
+
+	private fun commit(snapshot: List<ListModel>) {
+		val prevJob = commitJob
+		commitJob = launchJob {
+			prevJob?.cancelAndJoin()
+			delay(500)
+			val ids = snapshot.mapNotNullTo(ArrayList(snapshot.size)) {
+				(it as? CategoryListModel)?.category?.id
+			}
+			repository.reorderCategories(ids)
+			yield()
+		}
+	}
+
+	private fun updateContent(categories: Map<FavouriteCategory, List<Cover>>) {
+		content.value = categories.map { (category, covers) ->
+			CategoryListModel(
+				mangaCount = covers.size,
+				covers = covers.take(3),
+				category = category,
+				isTrackerEnabled = settings.isTrackerEnabled && AppSettings.TRACK_FAVOURITES in settings.trackSources,
+			)
+		}.ifEmpty {
+			listOf(
+				EmptyState(
+					icon = R.drawable.ic_empty_favourites,
+					textPrimary = R.string.text_empty_holder_primary,
+					textSecondary = R.string.empty_favourite_categories,
+					actionStringRes = 0,
+				),
+			)
+		}
+	}
 }

app/src/main/kotlin/org/koitharu/kotatsu/favourites/ui/categories/select/FavouriteSheet.kt

@@ -76,10 +76,7 @@ class FavouriteSheet :
 				putParcelableArrayList(
 					KEY_MANGA_LIST,
 					manga.mapTo(ArrayList(manga.size)) {
-						ParcelableManga(
+						ParcelableManga(it)
-							it,
-							withChapters = false,
-						)
 					},
 				)
 			}.showDistinct(fm, TAG)

app/src/main/kotlin/org/koitharu/kotatsu/filter/ui/FilterCoordinator.kt

@@ -131,7 +131,7 @@ class FilterCoordinator @Inject constructor(
 		observeState(),
 		observeAvailableTags(),
 	) { state, available ->
-		val chips = createChipsList(state, available.orEmpty())
+		val chips = createChipsList(state, available.orEmpty(), 8)
 		FilterHeaderModel(chips, state.sortOrder, state.tags.isNotEmpty())
 	}
 
@@ -157,11 +157,16 @@ class FilterCoordinator @Inject constructor(
 	private suspend fun createChipsList(
 		filterState: FilterState,
 		availableTags: Set<MangaTag>,
+		limit: Int,
 	): List<ChipsView.ChipModel> {
 		val selectedTags = filterState.tags.toMutableSet()
-		var tags = searchRepository.getTagsSuggestion("", 6, repository.source)
+		var tags = if (selectedTags.isEmpty()) {
-		if (tags.isEmpty()) {
+			searchRepository.getTagsSuggestion("", limit, repository.source)
-			tags = availableTags.take(6)
+		} else {
+			searchRepository.getTagsSuggestion(selectedTags).take(limit)
+		}
+		if (tags.size < limit) {
+			tags = tags + availableTags.take(limit - tags.size)
 		}
 		if (tags.isEmpty() && selectedTags.isEmpty()) {
 			return emptyList()

app/src/main/kotlin/org/koitharu/kotatsu/history/data/HistoryRepository.kt

@@ -14,6 +14,7 @@ import org.koitharu.kotatsu.core.db.entity.toManga
 import org.koitharu.kotatsu.core.db.entity.toMangaTag
 import org.koitharu.kotatsu.core.db.entity.toMangaTags
 import org.koitharu.kotatsu.core.model.MangaHistory
+import org.koitharu.kotatsu.core.model.findById
 import org.koitharu.kotatsu.core.prefs.AppSettings
 import org.koitharu.kotatsu.core.ui.util.ReversibleHandle
 import org.koitharu.kotatsu.core.util.ext.mapItems
@@ -107,7 +108,7 @@ class HistoryRepository @Inject constructor(
 				),
 			)
 			trackingRepository.syncWithHistory(manga, chapterId)
-			val chapter = manga.chapters?.find { x -> x.id == chapterId }
+			val chapter = manga.chapters?.findById(chapterId)
 			if (chapter != null) {
 				scrobblers.forEach { it.tryScrobble(manga.id, chapter) }
 			}
@@ -181,7 +182,7 @@ class HistoryRepository @Inject constructor(
 
 	private suspend fun HistoryEntity.recoverIfNeeded(manga: Manga): HistoryEntity {
 		val chapters = manga.chapters
-		if (chapters.isNullOrEmpty() || chapters.any { it.id == chapterId }) {
+		if (chapters.isNullOrEmpty() || chapters.findById(chapterId) != null) {
 			return this
 		}
 		val newChapterId = chapters.getOrNull(

app/src/main/kotlin/org/koitharu/kotatsu/list/ui/MangaListViewModel.kt

@@ -34,6 +34,9 @@ abstract class MangaListViewModel(
 	)
 	val onDownloadStarted = MutableEventFlow<Unit>()
 
+	val isIncognitoModeEnabled: Boolean
+		get() = settings.isIncognitoModeEnabled
+
 	open fun onUpdateFilter(tags: Set<MangaTag>) = Unit
 
 	abstract fun onRefresh()

app/src/main/kotlin/org/koitharu/kotatsu/list/ui/adapter/ListItemType.kt

@@ -25,4 +25,5 @@ enum class ListItemType {
 	DOWNLOAD,
 	CATEGORY_LARGE,
 	MANGA_SCROBBLING,
+	NAV_ITEM,
 }

app/src/main/kotlin/org/koitharu/kotatsu/list/ui/adapter/MangaGridItemAD.kt

@@ -1,5 +1,6 @@
 package org.koitharu.kotatsu.list.ui.adapter
 
+import android.view.View
 import androidx.lifecycle.LifecycleOwner
 import coil.ImageLoader
 import com.google.android.material.badge.BadgeDrawable
@@ -10,6 +11,7 @@ import org.koitharu.kotatsu.core.ui.image.TrimTransformation
 import org.koitharu.kotatsu.core.ui.list.OnListItemClickListener
 import org.koitharu.kotatsu.core.util.ext.enqueueWith
 import org.koitharu.kotatsu.core.util.ext.newImageRequest
+import org.koitharu.kotatsu.core.util.ext.setOnContextClickListenerCompat
 import org.koitharu.kotatsu.core.util.ext.source
 import org.koitharu.kotatsu.databinding.ItemMangaGridBinding
 import org.koitharu.kotatsu.list.ui.ListModelDiffCallback
@@ -28,12 +30,13 @@ fun mangaGridItemAD(
 ) {
 	var badge: BadgeDrawable? = null
 
-	itemView.setOnClickListener {
+	val eventListener = object : View.OnClickListener, View.OnLongClickListener {
-		clickListener.onItemClick(item.manga, it)
+		override fun onClick(v: View) = clickListener.onItemClick(item.manga, v)
-	}
+		override fun onLongClick(v: View): Boolean = clickListener.onItemLongClick(item.manga, v)
-	itemView.setOnLongClickListener {
-		clickListener.onItemLongClick(item.manga, it)
 	}
+	itemView.setOnClickListener(eventListener)
+	itemView.setOnLongClickListener(eventListener)
+	itemView.setOnContextClickListenerCompat(eventListener)
 	sizeResolver.attachToView(lifecycleOwner, itemView, binding.textViewTitle, binding.progressView)
 
 	bind { payloads ->

app/src/main/kotlin/org/koitharu/kotatsu/list/ui/adapter/MangaListDetailedItemAD.kt

@@ -13,6 +13,7 @@ import org.koitharu.kotatsu.core.ui.image.TrimTransformation
 import org.koitharu.kotatsu.core.ui.widgets.ChipsView
 import org.koitharu.kotatsu.core.util.ext.enqueueWith
 import org.koitharu.kotatsu.core.util.ext.newImageRequest
+import org.koitharu.kotatsu.core.util.ext.setOnContextClickListenerCompat
 import org.koitharu.kotatsu.core.util.ext.source
 import org.koitharu.kotatsu.core.util.ext.textAndVisible
 import org.koitharu.kotatsu.databinding.ItemMangaListDetailsBinding
@@ -45,6 +46,7 @@ fun mangaListDetailedItemAD(
 	}
 	itemView.setOnClickListener(listenerAdapter)
 	itemView.setOnLongClickListener(listenerAdapter)
+	itemView.setOnContextClickListenerCompat(listenerAdapter)
 	binding.buttonRead.setOnClickListener(listenerAdapter)
 	binding.chipsTags.onChipClickListener = listenerAdapter
 

app/src/main/kotlin/org/koitharu/kotatsu/list/ui/adapter/MangaListItemAD.kt

@@ -1,5 +1,6 @@
 package org.koitharu.kotatsu.list.ui.adapter
 
+import android.view.View
 import androidx.lifecycle.LifecycleOwner
 import coil.ImageLoader
 import com.google.android.material.badge.BadgeDrawable
@@ -9,6 +10,7 @@ import org.koitharu.kotatsu.core.ui.image.TrimTransformation
 import org.koitharu.kotatsu.core.ui.list.OnListItemClickListener
 import org.koitharu.kotatsu.core.util.ext.enqueueWith
 import org.koitharu.kotatsu.core.util.ext.newImageRequest
+import org.koitharu.kotatsu.core.util.ext.setOnContextClickListenerCompat
 import org.koitharu.kotatsu.core.util.ext.source
 import org.koitharu.kotatsu.core.util.ext.textAndVisible
 import org.koitharu.kotatsu.databinding.ItemMangaListBinding
@@ -25,12 +27,13 @@ fun mangaListItemAD(
 ) {
 	var badge: BadgeDrawable? = null
 
-	itemView.setOnClickListener {
+	val eventListener = object : View.OnClickListener, View.OnLongClickListener {
-		clickListener.onItemClick(item.manga, it)
+		override fun onClick(v: View) = clickListener.onItemClick(item.manga, v)
-	}
+		override fun onLongClick(v: View): Boolean = clickListener.onItemLongClick(item.manga, v)
-	itemView.setOnLongClickListener {
-		clickListener.onItemLongClick(item.manga, it)
 	}
+	itemView.setOnClickListener(eventListener)
+	itemView.setOnLongClickListener(eventListener)
+	itemView.setOnContextClickListenerCompat(eventListener)
 
 	bind {
 		binding.textViewTitle.text = item.title

app/src/main/kotlin/org/koitharu/kotatsu/list/ui/adapter/TypedListSpacingDecoration.kt

@@ -13,34 +13,39 @@ class TypedListSpacingDecoration(
 ) : ItemDecoration() {
 
 	private val spacingSmall = context.resources.getDimensionPixelOffset(R.dimen.list_spacing_small)
-	private val spacingNormal = context.resources.getDimensionPixelOffset(R.dimen.list_spacing_normal)
+	private val spacingNormal =
+		context.resources.getDimensionPixelOffset(R.dimen.list_spacing_normal)
 	private val spacingLarge = context.resources.getDimensionPixelOffset(R.dimen.list_spacing_large)
 
 	override fun getItemOffsets(
 		outRect: Rect,
 		view: View,
 		parent: RecyclerView,
-		state: RecyclerView.State
+		state: RecyclerView.State,
 	) {
 		val itemType = parent.getChildViewHolder(view)?.itemViewType?.let {
 			ListItemType.entries.getOrNull(it)
 		}
 		when (itemType) {
 			ListItemType.FILTER_SORT,
-			ListItemType.FILTER_TAG -> outRect.set(0)
+			ListItemType.FILTER_TAG,
+			-> outRect.set(0)
 
 			ListItemType.HEADER,
 			ListItemType.FEED,
 			ListItemType.EXPLORE_SOURCE_LIST,
 			ListItemType.MANGA_SCROBBLING,
-			ListItemType.MANGA_LIST -> outRect.set(0)
+			ListItemType.MANGA_LIST,
+			-> outRect.set(0)
 
 			ListItemType.DOWNLOAD,
 			ListItemType.HINT_EMPTY,
-			ListItemType.MANGA_LIST_DETAILED -> outRect.set(spacingNormal)
+			ListItemType.MANGA_LIST_DETAILED,
+			-> outRect.set(spacingNormal)
 
 			ListItemType.PAGE_THUMB,
-			ListItemType.MANGA_GRID -> outRect.set(spacingNormal)
+			ListItemType.MANGA_GRID,
+			-> outRect.set(spacingNormal)
 
 			ListItemType.EXPLORE_BUTTONS -> outRect.set(spacingNormal)
 
@@ -53,7 +58,9 @@ class TypedListSpacingDecoration(
 			ListItemType.EXPLORE_SUGGESTION,
 			ListItemType.MANGA_NESTED_GROUP,
 			ListItemType.CATEGORY_LARGE,
-			null -> outRect.set(0)
+			ListItemType.NAV_ITEM,
+			null,
+			-> outRect.set(0)
 
 			ListItemType.TIP -> outRect.set(0) // TODO
 		}
@@ -70,6 +77,6 @@ class TypedListSpacingDecoration(
 	private fun Rect.set(spacing: Int) = set(spacing, spacing, spacing, spacing)
 
 	private fun ListItemType?.isEdgeToEdge() = this == ListItemType.MANGA_NESTED_GROUP
-		|| this == ListItemType.FILTER_SORT
+			|| this == ListItemType.FILTER_SORT
-		|| this == ListItemType.FILTER_TAG
+			|| this == ListItemType.FILTER_TAG
 }

app/src/main/kotlin/org/koitharu/kotatsu/local/data/input/LocalMangaDirInput.kt

@@ -5,6 +5,7 @@ import androidx.core.net.toUri
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.runInterruptible
 import org.koitharu.kotatsu.core.util.AlphanumComparator
+import org.koitharu.kotatsu.core.util.ext.creationTime
 import org.koitharu.kotatsu.core.util.ext.listFilesRecursive
 import org.koitharu.kotatsu.core.util.ext.longHashCode
 import org.koitharu.kotatsu.core.util.ext.toListSorted
@@ -62,7 +63,7 @@ class LocalMangaDirInput(root: File) : LocalMangaInput(root) {
 					name = f.nameWithoutExtension.toHumanReadable(),
 					number = i + 1,
 					source = MangaSource.LOCAL,
-					uploadDate = f.lastModified(),
+					uploadDate = f.creationTime,
 					url = f.toUri().toString(),
 					scanlator = null,
 					branch = null,

app/src/main/kotlin/org/koitharu/kotatsu/local/data/output/LocalMangaDirOutput.kt

@@ -2,6 +2,7 @@ package org.koitharu.kotatsu.local.data.output
 
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.runInterruptible
+import org.koitharu.kotatsu.core.model.findById
 import org.koitharu.kotatsu.core.util.ext.deleteAwait
 import org.koitharu.kotatsu.core.util.ext.takeIfReadable
 import org.koitharu.kotatsu.core.zip.ZipOutput
@@ -87,7 +88,7 @@ class LocalMangaDirOutput(
 	suspend fun deleteChapter(chapterId: Long) {
 		val chapter = checkNotNull(index.getMangaInfo()?.chapters) {
 			"No chapters found"
-		}.first { it.id == chapterId }
+		}.findById(chapterId) ?: error("Chapter not found")
 		val chapterDir = File(rootFile, chapterFileName(chapter))
 		chapterDir.deleteAwait()
 		index.removeChapter(chapterId)

app/src/main/kotlin/org/koitharu/kotatsu/local/domain/model/LocalManga.kt

@@ -2,6 +2,7 @@ package org.koitharu.kotatsu.local.domain.model
 
 import androidx.core.net.toFile
 import androidx.core.net.toUri
+import org.koitharu.kotatsu.core.util.ext.creationTime
 import org.koitharu.kotatsu.parsers.model.Manga
 import org.koitharu.kotatsu.parsers.model.MangaTag
 import java.io.File
@@ -15,7 +16,7 @@ data class LocalManga(
 		private set
 		get() {
 			if (field == -1L) {
-				field = file.lastModified()
+				field = file.creationTime
 			}
 			return field
 		}

app/src/main/kotlin/org/koitharu/kotatsu/local/ui/ImportDialogFragment.kt

@@ -11,6 +11,7 @@ import androidx.fragment.app.FragmentManager
 import com.google.android.material.dialog.MaterialAlertDialogBuilder
 import org.koitharu.kotatsu.R
 import org.koitharu.kotatsu.core.ui.AlertDialogFragment
+import org.koitharu.kotatsu.core.util.ext.tryLaunch
 import org.koitharu.kotatsu.databinding.DialogImportBinding
 
 class ImportDialogFragment : AlertDialogFragment<DialogImportBinding>(), View.OnClickListener {
@@ -40,9 +41,13 @@ class ImportDialogFragment : AlertDialogFragment<DialogImportBinding>(), View.On
 	}
 
 	override fun onClick(v: View) {
-		when (v.id) {
+		val res = when (v.id) {
-			R.id.button_file -> importFileCall.launch(arrayOf("*/*"))
+			R.id.button_file -> importFileCall.tryLaunch(arrayOf("*/*"))
-			R.id.button_dir -> importDirCall.launch(null)
+			R.id.button_dir -> importDirCall.tryLaunch(null)
+			else -> true
+		}
+		if (!res) {
+			Toast.makeText(v.context, R.string.operation_not_supported, Toast.LENGTH_SHORT).show()
 		}
 	}
 

app/src/main/kotlin/org/koitharu/kotatsu/local/ui/LocalChaptersRemoveService.kt

@@ -106,7 +106,7 @@ class LocalChaptersRemoveService : CoroutineIntentService() {
 				return
 			}
 			val intent = Intent(context, LocalChaptersRemoveService::class.java)
-			intent.putExtra(EXTRA_MANGA, ParcelableManga(manga, withChapters = false))
+			intent.putExtra(EXTRA_MANGA, ParcelableManga(manga))
 			intent.putExtra(EXTRA_CHAPTERS_IDS, chaptersIds.toLongArray())
 			ContextCompat.startForegroundService(context, intent)
 		}

app/src/main/kotlin/org/koitharu/kotatsu/local/ui/LocalListFragment.kt

@@ -47,12 +47,20 @@ class LocalListFragment : MangaListFragment(), FilterOwner {
 
 	override fun onScrolledToEnd() = viewModel.loadNextPage()
 
-	override fun onCreateActionMode(controller: ListSelectionController, mode: ActionMode, menu: Menu): Boolean {
+	override fun onCreateActionMode(
+		controller: ListSelectionController,
+		mode: ActionMode,
+		menu: Menu,
+	): Boolean {
 		mode.menuInflater.inflate(R.menu.mode_local, menu)
 		return super.onCreateActionMode(controller, mode, menu)
 	}
 
-	override fun onActionItemClicked(controller: ListSelectionController, mode: ActionMode, item: MenuItem): Boolean {
+	override fun onActionItemClicked(
+		controller: ListSelectionController,
+		mode: ActionMode,
+		item: MenuItem,
+	): Boolean {
 		return when (item.itemId) {
 			R.id.action_remove -> {
 				showDeletionConfirm(selectedItemsIds, mode)
@@ -83,13 +91,20 @@ class LocalListFragment : MangaListFragment(), FilterOwner {
 	}
 
 	private fun onItemRemoved() {
-		Snackbar.make(requireViewBinding().recyclerView, R.string.removal_completed, Snackbar.LENGTH_SHORT).show()
+		Snackbar.make(
+			requireViewBinding().recyclerView,
+			R.string.removal_completed,
+			Snackbar.LENGTH_SHORT
+		).show()
 	}
 
 	companion object {
 
 		fun newInstance() = LocalListFragment().withArgs(1) {
-			putSerializable(RemoteListFragment.ARG_SOURCE, MangaSource.LOCAL) // required by FilterCoordinator
+			putSerializable(
+				RemoteListFragment.ARG_SOURCE,
+				MangaSource.LOCAL
+			) // required by FilterCoordinator
 		}
 	}
 }

app/src/main/kotlin/org/koitharu/kotatsu/main/domain/CoverRestoreInterceptor.kt

@@ -8,6 +8,7 @@ import coil.request.ImageResult
 import org.jsoup.HttpStatusException
 import org.koitharu.kotatsu.bookmarks.domain.Bookmark
 import org.koitharu.kotatsu.bookmarks.domain.BookmarksRepository
+import org.koitharu.kotatsu.core.model.findById
 import org.koitharu.kotatsu.core.parser.MangaDataRepository
 import org.koitharu.kotatsu.core.parser.MangaRepository
 import org.koitharu.kotatsu.core.parser.RemoteMangaRepository
@@ -92,7 +93,7 @@ class CoverRestoreInterceptor @Inject constructor(
 
 	private suspend fun restoreBookmarkImpl(bookmark: Bookmark): Boolean {
 		val repo = repositoryFactory.create(bookmark.manga.source) as? RemoteMangaRepository ?: return false
-		val chapter = repo.getDetails(bookmark.manga).chapters?.find { it.id == bookmark.chapterId } ?: return false
+		val chapter = repo.getDetails(bookmark.manga).chapters?.findById(bookmark.chapterId) ?: return false
 		val page = repo.getPages(chapter)[bookmark.page]
 		val imageUrl = page.preview.ifNullOrEmpty { page.url }
 		return if (imageUrl != bookmark.imageUrl) {

app/src/main/kotlin/org/koitharu/kotatsu/main/ui/MainActivity.kt

@@ -37,6 +37,7 @@ import kotlinx.coroutines.withContext
 import org.koitharu.kotatsu.R
 import org.koitharu.kotatsu.core.exceptions.resolve.SnackbarErrorObserver
 import org.koitharu.kotatsu.core.prefs.AppSettings
+import org.koitharu.kotatsu.core.prefs.NavItem
 import org.koitharu.kotatsu.core.ui.BaseActivity
 import org.koitharu.kotatsu.core.ui.util.MenuInvalidator
 import org.koitharu.kotatsu.core.ui.util.OptionsMenuBadgeHelper
@@ -71,8 +72,10 @@ import com.google.android.material.R as materialR
 private const val TAG_SEARCH = "search"
 
 @AndroidEntryPoint
-class MainActivity : BaseActivity<ActivityMainBinding>(), AppBarOwner, BottomNavOwner, View.OnClickListener,
+class MainActivity : BaseActivity<ActivityMainBinding>(), AppBarOwner, BottomNavOwner,
-	View.OnFocusChangeListener, SearchSuggestionListener, MainNavigationDelegate.OnFragmentChangedListener {
+	View.OnClickListener,
+	View.OnFocusChangeListener, SearchSuggestionListener,
+	MainNavigationDelegate.OnFragmentChangedListener {
 
 	@Inject
 	lateinit var settings: AppSettings
@@ -80,6 +83,7 @@ class MainActivity : BaseActivity<ActivityMainBinding>(), AppBarOwner, BottomNav
 	private val viewModel by viewModels<MainViewModel>()
 	private val searchSuggestionViewModel by viewModels<SearchSuggestionViewModel>()
 	private val closeSearchCallback = CloseSearchCallback()
+	private val appUpdateDialog = AppUpdateDialog(this)
 	private lateinit var navigationDelegate: MainNavigationDelegate
 	private lateinit var appUpdateBadge: OptionsMenuBadgeHelper
 
@@ -108,7 +112,6 @@ class MainActivity : BaseActivity<ActivityMainBinding>(), AppBarOwner, BottomNav
 			onFocusChangeListener = this@MainActivity
 			searchSuggestionListener = this@MainActivity
 		}
-		window.statusBarColor = ContextCompat.getColor(this, R.color.dim_statusbar)
 
 		viewBinding.fab?.setOnClickListener(this)
 		viewBinding.navRail?.headerView?.setOnClickListener(this)
@@ -119,7 +122,7 @@ class MainActivity : BaseActivity<ActivityMainBinding>(), AppBarOwner, BottomNav
 			settings = settings,
 		)
 		navigationDelegate.addOnFragmentChangedListener(this)
-		navigationDelegate.onCreate(savedInstanceState)
+		navigationDelegate.onCreate(this, savedInstanceState)
 
 		appUpdateBadge = OptionsMenuBadgeHelper(viewBinding.toolbar, R.id.action_app_update)
 
@@ -137,8 +140,12 @@ class MainActivity : BaseActivity<ActivityMainBinding>(), AppBarOwner, BottomNav
 		viewModel.isResumeEnabled.observe(this, this::onResumeEnabledChanged)
 		viewModel.counters.observe(this, ::onCountersChanged)
 		viewModel.appUpdate.observe(this, MenuInvalidator(this))
-		viewModel.onFirstStart.observeEvent(this) { OnboardDialogFragment.showWelcome(supportFragmentManager) }
+		viewModel.onFirstStart.observeEvent(this) {
-		viewModel.isFeedAvailable.observe(this, ::onFeedAvailabilityChanged)
+			OnboardDialogFragment.show(supportFragmentManager)
+		}
+		viewModel.isIncognitoMode.observe(this) {
+			adjustSearchUI(isSearchOpened(), false)
+		}
 		searchSuggestionViewModel.isIncognitoModeEnabled.observe(this, this::onIncognitoModeChanged)
 	}
 
@@ -166,7 +173,8 @@ class MainActivity : BaseActivity<ActivityMainBinding>(), AppBarOwner, BottomNav
 		if (menu == null) {
 			return false
 		}
-		menu.findItem(R.id.action_incognito)?.isChecked = searchSuggestionViewModel.isIncognitoModeEnabled.value
+		menu.findItem(R.id.action_incognito)?.isChecked =
+			searchSuggestionViewModel.isIncognitoModeEnabled.value
 		val hasAppUpdate = viewModel.appUpdate.value != null
 		menu.findItem(R.id.action_app_update)?.isVisible = hasAppUpdate
 		appUpdateBadge.setBadgeVisible(hasAppUpdate)
@@ -193,8 +201,7 @@ class MainActivity : BaseActivity<ActivityMainBinding>(), AppBarOwner, BottomNav
 
 		R.id.action_app_update -> {
 			viewModel.appUpdate.value?.also {
-				AppUpdateDialog(this)
+				appUpdateDialog.show(it)
-					.show(it)
 			} != null
 		}
 
@@ -234,10 +241,11 @@ class MainActivity : BaseActivity<ActivityMainBinding>(), AppBarOwner, BottomNav
 
 	override fun onQueryClick(query: String, submit: Boolean) {
 		viewBinding.searchView.query = query
-		if (submit) {
+		if (submit && query.isNotEmpty()) {
-			if (query.isNotEmpty()) {
+			startActivity(MultiSearchActivity.newIntent(this, query))
-				startActivity(MultiSearchActivity.newIntent(this, query))
+			searchSuggestionViewModel.saveQuery(query)
-				searchSuggestionViewModel.saveQuery(query)
+			viewBinding.searchView.post {
+				closeSearchCallback.handleOnBackPressed()
 			}
 		}
 	}
@@ -279,17 +287,12 @@ class MainActivity : BaseActivity<ActivityMainBinding>(), AppBarOwner, BottomNav
 		startActivity(IntentBuilder(this).manga(manga).build(), options)
 	}
 
-	private fun onCountersChanged(counters: IntArray) {
+	private fun onCountersChanged(counters: Map<NavItem, Int>) {
-		repeat(counters.size) { i ->
+		counters.forEach { (navItem, counter) ->
-			val counter = counters[i]
+			navigationDelegate.setCounter(navItem, counter)
-			navigationDelegate.setCounterAt(i, counter)
 		}
 	}
 
-	private fun onFeedAvailabilityChanged(isFeedAvailable: Boolean) {
-		navigationDelegate.setItemVisibility(R.id.nav_feed, isFeedAvailable)
-	}
-
 	private fun onIncognitoModeChanged(isIncognito: Boolean) {
 		var options = viewBinding.searchView.imeOptions
 		options = if (isIncognito) {
@@ -311,13 +314,11 @@ class MainActivity : BaseActivity<ActivityMainBinding>(), AppBarOwner, BottomNav
 
 	private fun onSearchOpened() {
 		adjustSearchUI(isOpened = true, animate = true)
-		closeSearchCallback.isEnabled = true
 	}
 
 	private fun onSearchClosed() {
 		viewBinding.searchView.hideKeyboard()
 		adjustSearchUI(isOpened = false, animate = true)
-		closeSearchCallback.isEnabled = false
 	}
 
 	private fun isSearchOpened(): Boolean {
@@ -362,8 +363,12 @@ class MainActivity : BaseActivity<ActivityMainBinding>(), AppBarOwner, BottomNav
 		} else {
 			SCROLL_FLAG_SCROLL or SCROLL_FLAG_ENTER_ALWAYS or SCROLL_FLAG_SNAP
 		}
-		viewBinding.toolbarCard.updateLayoutParams<AppBarLayout.LayoutParams> { scrollFlags = appBarScrollFlags }
+		viewBinding.toolbarCard.updateLayoutParams<AppBarLayout.LayoutParams> {
-		viewBinding.insetsHolder.updateLayoutParams<AppBarLayout.LayoutParams> { scrollFlags = appBarScrollFlags }
+			scrollFlags = appBarScrollFlags
+		}
+		viewBinding.insetsHolder.updateLayoutParams<AppBarLayout.LayoutParams> {
+			scrollFlags = appBarScrollFlags
+		}
 		viewBinding.toolbarCard.background = if (isOpened) {
 			null
 		} else {
@@ -372,13 +377,23 @@ class MainActivity : BaseActivity<ActivityMainBinding>(), AppBarOwner, BottomNav
 		val padding = if (isOpened) 0 else resources.getDimensionPixelOffset(R.dimen.margin_normal)
 		viewBinding.appbar.updatePadding(left = padding, right = padding)
 		adjustFabVisibility(isSearchOpened = isOpened)
-		supportActionBar?.setHomeAsUpIndicator(
+		supportActionBar?.apply {
-			if (isOpened) materialR.drawable.abc_ic_ab_back_material else materialR.drawable.abc_ic_search_api_material,
+			setHomeAsUpIndicator(
-		)
+				when {
+					isOpened -> materialR.drawable.abc_ic_ab_back_material
+					viewModel.isIncognitoMode.value -> R.drawable.ic_incognito
+					else -> materialR.drawable.abc_ic_search_api_material
+				},
+			)
+			setHomeActionContentDescription(
+				if (isOpened) R.string.back else R.string.search,
+			)
+		}
 		viewBinding.searchView.setHintCompat(
 			if (isOpened) R.string.search_hint else R.string.search_manga,
 		)
 		bottomNav?.showOrHide(!isOpened)
+		closeSearchCallback.isEnabled = isOpened
 	}
 
 	private fun requestNotificationsPermission() {
@@ -387,7 +402,11 @@ class MainActivity : BaseActivity<ActivityMainBinding>(), AppBarOwner, BottomNav
 				Manifest.permission.POST_NOTIFICATIONS,
 			) != PERMISSION_GRANTED
 		) {
-			ActivityCompat.requestPermissions(this, arrayOf(Manifest.permission.POST_NOTIFICATIONS), 1)
+			ActivityCompat.requestPermissions(
+				this,
+				arrayOf(Manifest.permission.POST_NOTIFICATIONS),
+				1,
+			)
 		}
 	}
 

app/src/main/kotlin/org/koitharu/kotatsu/main/ui/MainNavigationDelegate.kt

@@ -1,6 +1,7 @@
 package org.koitharu.kotatsu.main.ui
 
 import android.os.Bundle
+import android.view.Menu
 import android.view.MenuItem
 import androidx.activity.OnBackPressedCallback
 import androidx.annotation.IdRes
@@ -8,16 +9,28 @@ import androidx.core.view.isEmpty
 import androidx.core.view.iterator
 import androidx.fragment.app.Fragment
 import androidx.fragment.app.FragmentManager
+import androidx.lifecycle.LifecycleOwner
+import androidx.lifecycle.lifecycleScope
 import com.google.android.material.navigation.NavigationBarView
 import com.google.android.material.transition.MaterialFadeThrough
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.flow.filter
+import kotlinx.coroutines.flow.flowOn
+import kotlinx.coroutines.flow.launchIn
+import kotlinx.coroutines.flow.onEach
+import kotlinx.coroutines.flow.onStart
 import org.koitharu.kotatsu.R
+import org.koitharu.kotatsu.bookmarks.ui.BookmarksFragment
 import org.koitharu.kotatsu.core.prefs.AppSettings
+import org.koitharu.kotatsu.core.prefs.NavItem
 import org.koitharu.kotatsu.core.ui.util.RecyclerViewOwner
 import org.koitharu.kotatsu.core.util.ext.firstVisibleItemPosition
 import org.koitharu.kotatsu.core.util.ext.isAnimationsEnabled
 import org.koitharu.kotatsu.explore.ui.ExploreFragment
 import org.koitharu.kotatsu.favourites.ui.container.FavouritesContainerFragment
 import org.koitharu.kotatsu.history.ui.HistoryListFragment
+import org.koitharu.kotatsu.local.ui.LocalListFragment
+import org.koitharu.kotatsu.suggestions.ui.SuggestionsFragment
 import org.koitharu.kotatsu.tracker.ui.feed.FeedFragment
 import java.util.LinkedList
 
@@ -59,14 +72,14 @@ class MainNavigationDelegate(
 	}
 
 	override fun handleOnBackPressed() {
-		navBar.selectedItemId = R.id.nav_history
+		navBar.selectedItemId = firstItem()?.itemId ?: return
 	}
 
-	fun onCreate(savedInstanceState: Bundle?) {
+	fun onCreate(lifecycleOwner: LifecycleOwner, savedInstanceState: Bundle?) {
 		if (navBar.menu.isEmpty()) {
-			val menuRes = if (settings.isFavoritesNavItemFirst) R.menu.nav_bottom_alt else R.menu.nav_bottom
+			createMenu(settings.mainNavItems, navBar.menu)
-			navBar.inflateMenu(menuRes)
 		}
+		observeSettings(lifecycleOwner)
 		val fragment = primaryFragment
 		if (fragment != null) {
 			onFragmentChanged(fragment, fromUser = false)
@@ -84,12 +97,11 @@ class MainNavigationDelegate(
 		}
 	}
 
-	fun setCounterAt(position: Int, counter: Int) {
+	fun setCounter(item: NavItem, counter: Int) {
-		val id = navBar.menu.getItem(position).itemId
+		setCounter(item.id, counter)
-		setCounter(id, counter)
 	}
 
-	fun setCounter(@IdRes id: Int, counter: Int) {
+	private fun setCounter(@IdRes id: Int, counter: Int) {
 		if (counter == 0) {
 			navBar.getBadge(id)?.isVisible = false
 		} else {
@@ -123,9 +135,12 @@ class MainNavigationDelegate(
 		return setPrimaryFragment(
 			when (itemId) {
 				R.id.nav_history -> HistoryListFragment()
-				R.id.nav_favourites -> FavouritesContainerFragment()
+				R.id.nav_favorites -> FavouritesContainerFragment()
 				R.id.nav_explore -> ExploreFragment()
 				R.id.nav_feed -> FeedFragment()
+				R.id.nav_local -> LocalListFragment.newInstance()
+				R.id.nav_suggestions -> SuggestionsFragment()
+				R.id.nav_bookmarks -> BookmarksFragment()
 				else -> return false
 			},
 		)
@@ -133,9 +148,12 @@ class MainNavigationDelegate(
 
 	private fun getItemId(fragment: Fragment) = when (fragment) {
 		is HistoryListFragment -> R.id.nav_history
-		is FavouritesContainerFragment -> R.id.nav_favourites
+		is FavouritesContainerFragment -> R.id.nav_favorites
 		is ExploreFragment -> R.id.nav_explore
 		is FeedFragment -> R.id.nav_feed
+		is LocalListFragment -> R.id.nav_local
+		is SuggestionsFragment -> R.id.nav_suggestions
+		is BookmarksFragment -> R.id.nav_bookmarks
 		else -> 0
 	}
 
@@ -153,10 +171,28 @@ class MainNavigationDelegate(
 	}
 
 	private fun onFragmentChanged(fragment: Fragment, fromUser: Boolean) {
-		isEnabled = fragment !is HistoryListFragment
+		isEnabled = getItemId(fragment) != firstItem()?.itemId
 		listeners.forEach { it.onFragmentChanged(fragment, fromUser) }
 	}
 
+	private fun createMenu(items: List<NavItem>, menu: Menu) {
+		for (item in items) {
+			menu.add(Menu.NONE, item.id, Menu.NONE, item.title)
+				.setIcon(item.icon)
+		}
+	}
+
+	private fun observeSettings(lifecycleOwner: LifecycleOwner) {
+		settings.observe()
+			.filter { x -> x == AppSettings.KEY_TRACKER_ENABLED || x == AppSettings.KEY_SUGGESTIONS }
+			.onStart { emit("") }
+			.flowOn(Dispatchers.Default)
+			.onEach {
+				setItemVisibility(R.id.nav_suggestions, settings.isSuggestionsEnabled)
+				setItemVisibility(R.id.nav_feed, settings.isTrackerEnabled)
+			}.launchIn(lifecycleOwner.lifecycleScope)
+	}
+
 	private fun firstItem(): MenuItem? {
 		val menu = navBar.menu
 		for (item in menu) {

app/src/main/kotlin/org/koitharu/kotatsu/main/ui/MainViewModel.kt

@@ -12,6 +12,7 @@ import kotlinx.coroutines.plus
 import org.koitharu.kotatsu.core.exceptions.EmptyHistoryException
 import org.koitharu.kotatsu.core.github.AppUpdateRepository
 import org.koitharu.kotatsu.core.prefs.AppSettings
+import org.koitharu.kotatsu.core.prefs.NavItem
 import org.koitharu.kotatsu.core.prefs.observeAsStateFlow
 import org.koitharu.kotatsu.core.ui.BaseViewModel
 import org.koitharu.kotatsu.core.util.ext.MutableEventFlow
@@ -21,6 +22,7 @@ import org.koitharu.kotatsu.history.data.HistoryRepository
 import org.koitharu.kotatsu.main.domain.ReadingResumeEnabledUseCase
 import org.koitharu.kotatsu.parsers.model.Manga
 import org.koitharu.kotatsu.tracker.domain.TrackingRepository
+import java.util.EnumMap
 import javax.inject.Inject
 
 @HiltViewModel
@@ -42,10 +44,10 @@ class MainViewModel @Inject constructor(
 		initialValue = false,
 	)
 
-	val isFeedAvailable = settings.observeAsStateFlow(
+	val isIncognitoMode = settings.observeAsStateFlow(
 		scope = viewModelScope + Dispatchers.Default,
-		key = AppSettings.KEY_TRACKER_ENABLED,
+		key = AppSettings.KEY_INCOGNITO_MODE,
-		valueProducer = { isTrackerEnabled },
+		valueProducer = { isIncognitoModeEnabled },
 	)
 
 	val appUpdate = appUpdateRepository.observeAvailableUpdate()
@@ -54,11 +56,14 @@ class MainViewModel @Inject constructor(
 		trackingRepository.observeUpdatedMangaCount(),
 		observeNewSourcesCount(),
 	) { tracks, newSources ->
-		intArrayOf(0, 0, newSources, tracks)
+		val em = EnumMap<NavItem, Int>(NavItem::class.java)
+		em[NavItem.EXPLORE] = newSources
+		em[NavItem.FEED] = tracks
+		em
 	}.stateIn(
 		scope = viewModelScope + Dispatchers.Default,
 		started = SharingStarted.WhileSubscribed(5000),
-		initialValue = IntArray(4),
+		initialValue = emptyMap<NavItem, Int>(),
 	)
 
 	init {

app/src/main/kotlin/org/koitharu/kotatsu/reader/domain/ChaptersLoader.kt

@@ -2,6 +2,12 @@ package org.koitharu.kotatsu.reader.domain
 
 import android.util.LongSparseArray
 import dagger.hilt.android.scopes.ViewModelScoped
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.firstOrNull
+import kotlinx.coroutines.flow.mapNotNull
+import kotlinx.coroutines.launch
 import kotlinx.coroutines.sync.Mutex
 import kotlinx.coroutines.sync.withLock
 import org.koitharu.kotatsu.core.parser.MangaRepository
@@ -17,24 +23,32 @@ class ChaptersLoader @Inject constructor(
 	private val mangaRepositoryFactory: MangaRepository.Factory,
 ) {
 
-	private val chapters = LongSparseArray<MangaChapter>()
+	private val chapters = MutableStateFlow(LongSparseArray<MangaChapter>(0))
 	private val chapterPages = ChapterPages()
 	private val mutex = Mutex()
 
-	val size: Int
+	val size: Int // TODO flow
-		get() = chapters.size()
+		get() = chapters.value.size()
 
-	suspend fun init(manga: DoubleManga) = mutex.withLock {
+	fun init(scope: CoroutineScope, manga: Flow<DoubleManga>) = scope.launch {
-		chapters.clear()
+		manga.collect {
-		manga.chapters?.forEach {
+			val ch = it.chapters.orEmpty()
-			chapters.put(it.id, it)
+			val longSparseArray = LongSparseArray<MangaChapter>(ch.size)
+			ch.forEach { x -> longSparseArray.put(x.id, x) }
+			mutex.withLock {
+				chapters.value = longSparseArray
+			}
 		}
 	}
 
 	suspend fun loadPrevNextChapter(manga: DoubleManga, currentId: Long, isNext: Boolean) {
 		val chapters = manga.chapters ?: return
 		val predicate: (MangaChapter) -> Boolean = { it.id == currentId }
-		val index = if (isNext) chapters.indexOfFirst(predicate) else chapters.indexOfLast(predicate)
+		val index = if (isNext) {
+			chapters.indexOfFirst(predicate)
+		} else {
+			chapters.indexOfLast(predicate)
+		}
 		if (index == -1) return
 		val newChapter = chapters.getOrNull(if (isNext) index + 1 else index - 1) ?: return
 		val newPages = loadChapter(newChapter.id)
@@ -65,7 +79,11 @@ class ChaptersLoader @Inject constructor(
 		}
 	}
 
-	fun peekChapter(chapterId: Long): MangaChapter? = chapters[chapterId]
+	fun peekChapter(chapterId: Long): MangaChapter? = chapters.value[chapterId]
+
+	suspend fun awaitChapter(chapterId: Long): MangaChapter? = chapters.mapNotNull { x ->
+		x[chapterId]
+	}.firstOrNull()
 
 	fun getPages(chapterId: Long): List<ReaderPage> {
 		return chapterPages.subList(chapterId)
@@ -82,7 +100,7 @@ class ChaptersLoader @Inject constructor(
 	fun snapshot() = chapterPages.toList()
 
 	private suspend fun loadChapter(chapterId: Long): List<ReaderPage> {
-		val chapter = checkNotNull(chapters[chapterId]) { "Requested chapter not found" }
+		val chapter = checkNotNull(awaitChapter(chapterId)) { "Requested chapter not found" }
 		val repo = mangaRepositoryFactory.create(chapter.source)
 		return repo.getPages(chapter).mapIndexed { index, page ->
 			ReaderPage(page, index, chapterId)

app/src/main/kotlin/org/koitharu/kotatsu/reader/domain/DetectReaderModeUseCase.kt

@@ -13,11 +13,11 @@ import org.koitharu.kotatsu.core.parser.MangaDataRepository
 import org.koitharu.kotatsu.core.parser.MangaRepository
 import org.koitharu.kotatsu.core.prefs.AppSettings
 import org.koitharu.kotatsu.core.prefs.ReaderMode
+import org.koitharu.kotatsu.core.util.ext.printStackTraceDebug
 import org.koitharu.kotatsu.parsers.model.Manga
 import org.koitharu.kotatsu.parsers.model.MangaPage
 import org.koitharu.kotatsu.parsers.util.runCatchingCancellable
 import org.koitharu.kotatsu.reader.ui.ReaderState
-import org.koitharu.kotatsu.core.util.ext.printStackTraceDebug
 import java.io.InputStream
 import java.util.zip.ZipFile
 import javax.inject.Inject

app/src/main/kotlin/org/koitharu/kotatsu/reader/ui/ChaptersSheet.kt

@@ -5,16 +5,14 @@ import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
 import androidx.fragment.app.FragmentManager
+import androidx.fragment.app.activityViewModels
 import dagger.hilt.android.AndroidEntryPoint
 import org.koitharu.kotatsu.R
-import org.koitharu.kotatsu.core.model.parcelable.ParcelableMangaChapters
 import org.koitharu.kotatsu.core.prefs.AppSettings
 import org.koitharu.kotatsu.core.ui.list.OnListItemClickListener
 import org.koitharu.kotatsu.core.ui.sheet.BaseAdaptiveSheet
 import org.koitharu.kotatsu.core.util.RecyclerViewScrollCallback
-import org.koitharu.kotatsu.core.util.ext.getParcelableCompat
 import org.koitharu.kotatsu.core.util.ext.showDistinct
-import org.koitharu.kotatsu.core.util.ext.withArgs
 import org.koitharu.kotatsu.databinding.SheetChaptersBinding
 import org.koitharu.kotatsu.details.ui.adapter.ChaptersAdapter
 import org.koitharu.kotatsu.details.ui.model.ChapterListItem
@@ -24,23 +22,29 @@ import javax.inject.Inject
 import kotlin.math.roundToInt
 
 @AndroidEntryPoint
-class ChaptersSheet : BaseAdaptiveSheet<SheetChaptersBinding>(), OnListItemClickListener<ChapterListItem> {
+class ChaptersSheet : BaseAdaptiveSheet<SheetChaptersBinding>(),
+	OnListItemClickListener<ChapterListItem> {
 
 	@Inject
 	lateinit var settings: AppSettings
 
-	override fun onCreateViewBinding(inflater: LayoutInflater, container: ViewGroup?): SheetChaptersBinding {
+	private val viewModel: ReaderViewModel by activityViewModels()
+
+	override fun onCreateViewBinding(
+		inflater: LayoutInflater,
+		container: ViewGroup?,
+	): SheetChaptersBinding {
 		return SheetChaptersBinding.inflate(inflater, container, false)
 	}
 
 	override fun onViewBindingCreated(binding: SheetChaptersBinding, savedInstanceState: Bundle?) {
 		super.onViewBindingCreated(binding, savedInstanceState)
-		val chapters = arguments?.getParcelableCompat<ParcelableMangaChapters>(ARG_CHAPTERS)?.chapters
+		val chapters = viewModel.manga?.chapters
 		if (chapters.isNullOrEmpty()) {
 			dismissAllowingStateLoss()
 			return
 		}
-		val currentId = requireArguments().getLong(ARG_CURRENT_ID, 0L)
+		val currentId = viewModel.getCurrentState()?.chapterId ?: 0L
 		val currentPosition = chapters.indexOfFirst { it.id == currentId }
 		val items = chapters.mapIndexed { index, chapter ->
 			chapter.toListItem(
@@ -54,8 +58,11 @@ class ChaptersSheet : BaseAdaptiveSheet<SheetChaptersBinding>(), OnListItemClick
 		binding.recyclerView.adapter = ChaptersAdapter(this).also { adapter ->
 			if (currentPosition >= 0) {
 				val targetPosition = (currentPosition - 1).coerceAtLeast(0)
-				val offset = (resources.getDimensionPixelSize(R.dimen.chapter_list_item_height) * 0.6).roundToInt()
+				val offset =
-				adapter.setItems(items, RecyclerViewScrollCallback(binding.recyclerView, targetPosition, offset))
+					(resources.getDimensionPixelSize(R.dimen.chapter_list_item_height) * 0.6).roundToInt()
+				adapter.setItems(
+					items, RecyclerViewScrollCallback(binding.recyclerView, targetPosition, offset)
+				)
 			} else {
 				adapter.items = items
 			}
@@ -63,7 +70,8 @@ class ChaptersSheet : BaseAdaptiveSheet<SheetChaptersBinding>(), OnListItemClick
 	}
 
 	override fun onItemClick(item: ChapterListItem, view: View) {
-		((parentFragment as? OnChapterChangeListener) ?: (activity as? OnChapterChangeListener))?.let {
+		((parentFragment as? OnChapterChangeListener)
+			?: (activity as? OnChapterChangeListener))?.let {
 			dismiss()
 			it.onChapterChanged(item.chapter)
 		}
@@ -76,18 +84,8 @@ class ChaptersSheet : BaseAdaptiveSheet<SheetChaptersBinding>(), OnListItemClick
 
 	companion object {
 
-		private const val ARG_CHAPTERS = "chapters"
-		private const val ARG_CURRENT_ID = "current_id"
-
 		private const val TAG = "ChaptersBottomSheet"
 
-		fun show(
+		fun show(fm: FragmentManager) = ChaptersSheet().showDistinct(fm, TAG)
-			fm: FragmentManager,
-			chapters: List<MangaChapter>,
-			currentId: Long,
-		) = ChaptersSheet().withArgs(2) {
-			putParcelable(ARG_CHAPTERS, ParcelableMangaChapters(chapters))
-			putLong(ARG_CURRENT_ID, currentId)
-		}.showDistinct(fm, TAG)
 	}
 }

app/src/main/kotlin/org/koitharu/kotatsu/reader/ui/ReaderActivity.kt

@@ -44,6 +44,7 @@ import org.koitharu.kotatsu.core.util.GridTouchHelper
 import org.koitharu.kotatsu.core.util.IdlingDetector
 import org.koitharu.kotatsu.core.util.ShareHelper
 import org.koitharu.kotatsu.core.util.ext.hasGlobalPoint
+import org.koitharu.kotatsu.core.util.ext.isAnimationsEnabled
 import org.koitharu.kotatsu.core.util.ext.isRtl
 import org.koitharu.kotatsu.core.util.ext.observe
 import org.koitharu.kotatsu.core.util.ext.observeEvent
@@ -102,11 +103,11 @@ class ReaderActivity :
 	override fun onCreate(savedInstanceState: Bundle?) {
 		super.onCreate(savedInstanceState)
 		setContentView(ActivityReaderBinding.inflate(layoutInflater))
-		readerManager = ReaderManager(supportFragmentManager, R.id.container)
+		readerManager = ReaderManager(supportFragmentManager, viewBinding.container)
 		supportActionBar?.setDisplayHomeAsUpEnabled(true)
 		touchHelper = GridTouchHelper(this, this)
 		scrollTimer = scrollTimerFactory.create(this, this)
-		controlDelegate = ReaderControlDelegate(settings, this, this)
+		controlDelegate = ReaderControlDelegate(resources, settings, this, this)
 		viewBinding.toolbarBottom.setOnMenuItemClickListener(::onOptionsItemSelected)
 		viewBinding.slider.setLabelFormatter(PageLabelFormatter())
 		ReaderSliderListener(this, viewModel).attachToSlider(viewBinding.slider)
@@ -136,6 +137,7 @@ class ReaderActivity :
 			onLoadingStateChanged(viewModel.isLoading.value)
 		}
 		viewModel.isScreenshotsBlockEnabled.observe(this, this::setWindowSecure)
+		viewModel.isKeepScreenOnEnabled.observe(this, this::setKeepScreenOn)
 		viewModel.isInfoBarEnabled.observe(this, ::onReaderBarChanged)
 		viewModel.isBookmarkAdded.observe(this, this::onBookmarkStateChanged)
 		viewModel.onShowToast.observeEvent(this) { msgId ->
@@ -180,11 +182,7 @@ class ReaderActivity :
 			}
 
 			R.id.action_chapters -> {
-				ChaptersSheet.show(
+				ChaptersSheet.show(supportFragmentManager)
-					supportFragmentManager,
-					viewModel.manga?.chapters.orEmpty(),
-					viewModel.getCurrentState()?.chapterId ?: 0L,
-				)
 			}
 
 			R.id.action_pages_thumbs -> {
@@ -307,24 +305,30 @@ class ReaderActivity :
 		}
 	}
 
+	private fun setKeepScreenOn(isKeep: Boolean) {
+		if (isKeep) {
+			window.addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON)
+		} else {
+			window.clearFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON)
+		}
+	}
+
 	private fun setUiIsVisible(isUiVisible: Boolean) {
 		if (viewBinding.appbarTop.isVisible != isUiVisible) {
-			val transition = TransitionSet()
+			if (isAnimationsEnabled) {
-				.setOrdering(TransitionSet.ORDERING_TOGETHER)
+				val transition = TransitionSet()
-				.addTransition(Slide(Gravity.TOP).addTarget(viewBinding.appbarTop))
+					.setOrdering(TransitionSet.ORDERING_TOGETHER)
-				.addTransition(Fade().addTarget(viewBinding.infoBar))
+					.addTransition(Slide(Gravity.TOP).addTarget(viewBinding.appbarTop))
-			viewBinding.appbarBottom?.let { bottomBar ->
+					.addTransition(Fade().addTarget(viewBinding.infoBar))
-				transition.addTransition(Slide(Gravity.BOTTOM).addTarget(bottomBar))
+				viewBinding.appbarBottom?.let { bottomBar ->
+					transition.addTransition(Slide(Gravity.BOTTOM).addTarget(bottomBar))
+				}
+				TransitionManager.beginDelayedTransition(viewBinding.root, transition)
 			}
-			TransitionManager.beginDelayedTransition(viewBinding.root, transition)
 			viewBinding.appbarTop.isVisible = isUiVisible
 			viewBinding.appbarBottom?.isVisible = isUiVisible
 			viewBinding.infoBar.isGone = isUiVisible || (!viewModel.isInfoBarEnabled.value)
-			if (isUiVisible) {
+			systemUiController.setSystemUiVisible(isUiVisible)
-				showSystemUI()
-			} else {
-				hideSystemUI()
-			}
 		}
 	}
 
@@ -352,8 +356,8 @@ class ReaderActivity :
 		readerManager.currentReader?.switchPageBy(delta)
 	}
 
-	override fun scrollBy(delta: Int): Boolean {
+	override fun scrollBy(delta: Int, smooth: Boolean): Boolean {
-		return readerManager.currentReader?.scrollBy(delta) ?: false
+		return readerManager.currentReader?.scrollBy(delta, smooth) ?: false
 	}
 
 	override fun toggleUiVisibility() {
@@ -405,7 +409,7 @@ class ReaderActivity :
 			.setAction(ACTION_MANGA_READ)
 
 		fun manga(manga: Manga) = apply {
-			intent.putExtra(MangaIntent.KEY_MANGA, ParcelableManga(manga, withChapters = true))
+			intent.putExtra(MangaIntent.KEY_MANGA, ParcelableManga(manga))
 		}
 
 		fun mangaId(mangaId: Long) = apply {

app/src/main/kotlin/org/koitharu/kotatsu/reader/ui/ReaderControlDelegate.kt

@@ -1,16 +1,19 @@
 package org.koitharu.kotatsu.reader.ui
 
 import android.content.SharedPreferences
+import android.content.res.Resources
 import android.view.KeyEvent
 import android.view.SoundEffectConstants
 import android.view.View
 import androidx.lifecycle.DefaultLifecycleObserver
 import androidx.lifecycle.LifecycleOwner
+import org.koitharu.kotatsu.R
 import org.koitharu.kotatsu.core.prefs.AppSettings
 import org.koitharu.kotatsu.core.prefs.ReaderMode
 import org.koitharu.kotatsu.core.util.GridTouchHelper
 
 class ReaderControlDelegate(
+	resources: Resources,
 	private val settings: AppSettings,
 	private val listener: OnInteractionListener,
 	owner: LifecycleOwner,
@@ -19,6 +22,7 @@ class ReaderControlDelegate(
 	private var isTapSwitchEnabled: Boolean = true
 	private var isVolumeKeysSwitchEnabled: Boolean = false
 	private var isReaderTapsAdaptive: Boolean = true
+	private var minScrollDelta = resources.getDimensionPixelSize(R.dimen.reader_scroll_delta_min)
 
 	init {
 		owner.lifecycle.addObserver(this)
@@ -82,8 +86,6 @@ class ReaderControlDelegate(
 
 		KeyEvent.KEYCODE_SPACE,
 		KeyEvent.KEYCODE_PAGE_DOWN,
-		KeyEvent.KEYCODE_SYSTEM_NAVIGATION_DOWN,
-		KeyEvent.KEYCODE_DPAD_DOWN,
 		-> {
 			listener.switchPageBy(1)
 			true
@@ -95,8 +97,6 @@ class ReaderControlDelegate(
 		}
 
 		KeyEvent.KEYCODE_PAGE_UP,
-		KeyEvent.KEYCODE_SYSTEM_NAVIGATION_UP,
-		KeyEvent.KEYCODE_DPAD_UP,
 		-> {
 			listener.switchPageBy(-1)
 			true
@@ -112,6 +112,22 @@ class ReaderControlDelegate(
 			true
 		}
 
+		KeyEvent.KEYCODE_SYSTEM_NAVIGATION_UP,
+		KeyEvent.KEYCODE_DPAD_UP -> {
+			if (!listener.scrollBy(-minScrollDelta, smooth = true)) {
+				listener.switchPageBy(-1)
+			}
+			true
+		}
+
+		KeyEvent.KEYCODE_SYSTEM_NAVIGATION_DOWN,
+		KeyEvent.KEYCODE_DPAD_DOWN -> {
+			if (!listener.scrollBy(minScrollDelta, smooth = true)) {
+				listener.switchPageBy(1)
+			}
+			true
+		}
+
 		else -> false
 	}
 
@@ -139,7 +155,7 @@ class ReaderControlDelegate(
 
 		fun switchPageBy(delta: Int)
 
-		fun scrollBy(delta: Int): Boolean
+		fun scrollBy(delta: Int, smooth: Boolean): Boolean
 
 		fun toggleUiVisibility()
 

app/src/main/kotlin/org/koitharu/kotatsu/reader/ui/ReaderManager.kt

@@ -1,10 +1,12 @@
 package org.koitharu.kotatsu.reader.ui
 
-import androidx.annotation.IdRes
+import androidx.fragment.app.FragmentContainerView
 import androidx.fragment.app.FragmentManager
 import androidx.fragment.app.commit
+import org.koitharu.kotatsu.R
 import org.koitharu.kotatsu.core.prefs.ReaderMode
 import org.koitharu.kotatsu.reader.ui.pager.BaseReaderFragment
+import org.koitharu.kotatsu.reader.ui.pager.doublepage.DoublePageReaderFragment
 import org.koitharu.kotatsu.reader.ui.pager.reversed.ReversedReaderFragment
 import org.koitharu.kotatsu.reader.ui.pager.standard.PagerReaderFragment
 import org.koitharu.kotatsu.reader.ui.pager.webtoon.WebtoonReaderFragment
@@ -12,19 +14,24 @@ import java.util.EnumMap
 
 class ReaderManager(
 	private val fragmentManager: FragmentManager,
-	@IdRes private val containerResId: Int,
+	private val container: FragmentContainerView,
 ) {
 
 	private val modeMap = EnumMap<ReaderMode, Class<out BaseReaderFragment<*>>>(ReaderMode::class.java)
 
 	init {
-		modeMap[ReaderMode.STANDARD] = PagerReaderFragment::class.java
+		val isTablet = container.resources.getBoolean(R.bool.is_tablet)
+		modeMap[ReaderMode.STANDARD] = if (isTablet) {
+			DoublePageReaderFragment::class.java
+		} else {
+			PagerReaderFragment::class.java
+		}
 		modeMap[ReaderMode.REVERSED] = ReversedReaderFragment::class.java
 		modeMap[ReaderMode.WEBTOON] = WebtoonReaderFragment::class.java
 	}
 
 	val currentReader: BaseReaderFragment<*>?
-		get() = fragmentManager.findFragmentById(containerResId) as? BaseReaderFragment<*>
+		get() = fragmentManager.findFragmentById(container.id) as? BaseReaderFragment<*>
 
 	val currentMode: ReaderMode?
 		get() {
@@ -36,14 +43,14 @@ class ReaderManager(
 		val readerClass = requireNotNull(modeMap[newMode])
 		fragmentManager.commit {
 			setReorderingAllowed(true)
-			replace(containerResId, readerClass, null, null)
+			replace(container.id, readerClass, null, null)
 		}
 	}
 
-	fun replace(reader: BaseReaderFragment<*>) {
+	/*fun replace(reader: BaseReaderFragment<*>) {
 		fragmentManager.commit {
 			setReorderingAllowed(true)
 			replace(containerResId, reader)
 		}
-	}
+	}*/
 }

app/src/main/kotlin/org/koitharu/kotatsu/reader/ui/ReaderViewModel.kt

@@ -113,12 +113,24 @@ class ReaderViewModel @Inject constructor(
 		valueProducer = { isReaderBarEnabled },
 	)
 
+	val isKeepScreenOnEnabled = settings.observeAsStateFlow(
+		scope = viewModelScope + Dispatchers.Default,
+		key = AppSettings.KEY_READER_SCREEN_ON,
+		valueProducer = { isReaderKeepScreenOn },
+	)
+
 	val isWebtoonZoomEnabled = settings.observeAsStateFlow(
 		scope = viewModelScope + Dispatchers.Default,
 		key = AppSettings.KEY_WEBTOON_ZOOM,
 		valueProducer = { isWebtoonZoomEnable },
 	)
 
+	val isZoomControlEnabled = settings.observeAsStateFlow(
+		scope = viewModelScope + Dispatchers.Default,
+		key = AppSettings.KEY_READER_ZOOM_BUTTONS,
+		valueProducer = { isReaderZoomButtonsEnabled },
+	)
+
 	val readerSettings = ReaderSettings(
 		parentScope = viewModelScope,
 		settings = settings,
@@ -317,8 +329,9 @@ class ReaderViewModel @Inject constructor(
 					?: throw NotFoundException("Cannot find manga", ""),
 			)
 			mangaData.value = manga
-			manga = doubleMangaLoadUseCase(intent)
+			val mangaFlow = doubleMangaLoadUseCase(intent)
-			chaptersLoader.init(manga)
+			manga = mangaFlow.first { x -> x.any != null }
+			chaptersLoader.init(viewModelScope, mangaFlow.withErrorHandling())
 			// determine mode
 			val singleManga = manga.requireAny()
 			// obtain state
@@ -328,7 +341,7 @@ class ReaderViewModel @Inject constructor(
 				} ?: ReaderState(singleManga, preselectedBranch)
 			}
 			val mode = detectReaderModeUseCase.invoke(singleManga, currentState.value)
-			val branch = chaptersLoader.peekChapter(currentState.value?.chapterId ?: 0L)?.branch
+			val branch = chaptersLoader.awaitChapter(currentState.value?.chapterId ?: 0L)?.branch
 			mangaData.value = manga.filterChapters(branch)
 			readerMode.value = mode
 

app/src/main/kotlin/org/koitharu/kotatsu/reader/ui/ScrollTimer.kt

@@ -17,7 +17,7 @@ import org.koitharu.kotatsu.core.prefs.AppSettings
 import org.koitharu.kotatsu.core.prefs.observeAsFlow
 import kotlin.math.roundToLong
 
-private const val MAX_DELAY = 20L
+private const val MAX_DELAY = 8L
 private const val MAX_SWITCH_DELAY = 10_000L
 private const val INTERACTION_SKIP_MS = 2_000L
 private const val SPEED_FACTOR_DELTA = 0.02f
@@ -96,7 +96,7 @@ class ScrollTimer @AssistedInject constructor(
 				if (!listener.isReaderResumed()) {
 					continue
 				}
-				if (!listener.scrollBy(1)) {
+				if (!listener.scrollBy(1, false)) {
 					accumulator += delayMs
 				}
 				if (accumulator >= pageSwitchDelay) {

app/src/main/kotlin/org/koitharu/kotatsu/reader/ui/colorfilter/ColorFilterConfigActivity.kt

@@ -152,7 +152,7 @@ class ColorFilterConfigActivity :
 
 		fun newIntent(context: Context, manga: Manga, page: MangaPage) =
 			Intent(context, ColorFilterConfigActivity::class.java)
-				.putExtra(EXTRA_MANGA, ParcelableManga(manga, withChapters = false))
+				.putExtra(EXTRA_MANGA, ParcelableManga(manga))
 				.putExtra(EXTRA_PAGES, ParcelableMangaPage(page))
 	}
 }

app/src/main/kotlin/org/koitharu/kotatsu/reader/ui/config/ReaderSettings.kt

@@ -32,6 +32,9 @@ class ReaderSettings(
 	val isPagesNumbersEnabled: Boolean
 		get() = settings.isPagesNumbersEnabled
 
+	val isZoomControlsEnabled: Boolean
+		get() = settings.isReaderZoomButtonsEnabled
+
 	fun applyBackground(view: View) {
 		val bg = settings.readerBackground
 		view.background = bg.resolve(view.context)
@@ -74,6 +77,7 @@ class ReaderSettings(
 				key == AppSettings.KEY_ZOOM_MODE ||
 				key == AppSettings.KEY_PAGES_NUMBERS ||
 				key == AppSettings.KEY_WEBTOON_ZOOM ||
+				key == AppSettings.KEY_READER_ZOOM_BUTTONS ||
 				key == AppSettings.KEY_READER_BACKGROUND
 			) {
 				notifyChanged()

app/src/main/kotlin/org/koitharu/kotatsu/reader/ui/pager/BasePageHolder.kt

@@ -13,7 +13,7 @@ import org.koitharu.kotatsu.reader.ui.config.ReaderSettings
 abstract class BasePageHolder<B : ViewBinding>(
 	protected val binding: B,
 	loader: PageLoader,
-	private val settings: ReaderSettings,
+	protected val settings: ReaderSettings,
 	networkState: NetworkState,
 	exceptionResolver: ExceptionResolver,
 ) : RecyclerView.ViewHolder(binding.root), PageHolderDelegate.Callback {

app/src/main/kotlin/org/koitharu/kotatsu/reader/ui/pager/BaseReaderFragment.kt

@@ -66,7 +66,7 @@ abstract class BaseReaderFragment<B : ViewBinding> : BaseFragment<B>() {
 
 	abstract fun switchPageTo(position: Int, smooth: Boolean)
 
-	open fun scrollBy(delta: Int): Boolean = false
+	open fun scrollBy(delta: Int, smooth: Boolean): Boolean = false
 
 	abstract fun getCurrentState(): ReaderState?
 

app/src/main/kotlin/org/koitharu/kotatsu/reader/ui/pager/doublepage/DoublePageHolder.kt

@@ -0,0 +1,48 @@
+package org.koitharu.kotatsu.reader.ui.pager.doublepage
+
+import android.graphics.PointF
+import android.view.Gravity
+import android.widget.FrameLayout
+import androidx.lifecycle.LifecycleOwner
+import com.davemorrissey.labs.subscaleview.SubsamplingScaleImageView
+import org.koitharu.kotatsu.core.exceptions.resolve.ExceptionResolver
+import org.koitharu.kotatsu.core.os.NetworkState
+import org.koitharu.kotatsu.databinding.ItemPageBinding
+import org.koitharu.kotatsu.reader.domain.PageLoader
+import org.koitharu.kotatsu.reader.ui.config.ReaderSettings
+import org.koitharu.kotatsu.reader.ui.pager.ReaderPage
+import org.koitharu.kotatsu.reader.ui.pager.standard.PageHolder
+
+class DoublePageHolder(
+	owner: LifecycleOwner,
+	binding: ItemPageBinding,
+	loader: PageLoader,
+	settings: ReaderSettings,
+	networkState: NetworkState,
+	exceptionResolver: ExceptionResolver,
+) : PageHolder(owner, binding, loader, settings, networkState, exceptionResolver) {
+
+	private val isEven: Boolean
+		get() = bindingAdapterPosition and 1 == 0
+
+	override fun onBind(data: ReaderPage) {
+		super.onBind(data)
+		(binding.textViewNumber.layoutParams as FrameLayout.LayoutParams)
+			.gravity = (if (isEven) Gravity.START else Gravity.END) or Gravity.BOTTOM
+	}
+
+	override fun onImageShowing(settings: ReaderSettings) {
+		with(binding.ssiv) {
+			maxScale = 2f * maxOf(
+				width / sWidth.toFloat(),
+				height / sHeight.toFloat(),
+			)
+			binding.ssiv.colorFilter = settings.colorFilter?.toColorFilter()
+			minimumScaleType = SubsamplingScaleImageView.SCALE_TYPE_CENTER_INSIDE
+			setScaleAndCenter(
+				minScale,
+				PointF(if (isEven) sWidth.toFloat() else 0f, 0f),
+			)
+		}
+	}
+}

app/src/main/kotlin/org/koitharu/kotatsu/reader/ui/pager/doublepage/DoublePageLayoutManager.kt

@@ -0,0 +1,19 @@
+package org.koitharu.kotatsu.reader.ui.pager.doublepage
+
+import android.content.Context
+import android.util.AttributeSet
+import androidx.recyclerview.widget.LinearLayoutManager
+import androidx.recyclerview.widget.RecyclerView
+
+class DoublePageLayoutManager(
+	context: Context,
+	attrs: AttributeSet?,
+	defStyleAttr: Int,
+	defStyleRes: Int,
+) : LinearLayoutManager(context, attrs, defStyleAttr, defStyleRes) {
+
+	override fun checkLayoutParams(lp: RecyclerView.LayoutParams?): Boolean {
+		lp?.width = width / 2
+		return super.checkLayoutParams(lp)
+	}
+}

app/src/main/kotlin/org/koitharu/kotatsu/reader/ui/pager/doublepage/DoublePageReaderFragment.kt

@@ -0,0 +1,128 @@
+package org.koitharu.kotatsu.reader.ui.pager.doublepage
+
+import android.os.Bundle
+import android.view.LayoutInflater
+import android.view.ViewGroup
+import androidx.recyclerview.widget.LinearLayoutManager
+import androidx.recyclerview.widget.RecyclerView
+import com.google.android.material.snackbar.Snackbar
+import dagger.hilt.android.AndroidEntryPoint
+import kotlinx.coroutines.async
+import kotlinx.coroutines.coroutineScope
+import kotlinx.coroutines.yield
+import org.koitharu.kotatsu.R
+import org.koitharu.kotatsu.core.os.NetworkState
+import org.koitharu.kotatsu.core.util.ext.firstVisibleItemPosition
+import org.koitharu.kotatsu.databinding.FragmentReaderDoubleBinding
+import org.koitharu.kotatsu.parsers.util.toIntUp
+import org.koitharu.kotatsu.reader.domain.PageLoader
+import org.koitharu.kotatsu.reader.ui.ReaderState
+import org.koitharu.kotatsu.reader.ui.pager.BaseReaderAdapter
+import org.koitharu.kotatsu.reader.ui.pager.BaseReaderFragment
+import org.koitharu.kotatsu.reader.ui.pager.ReaderPage
+import javax.inject.Inject
+import kotlin.math.absoluteValue
+
+@AndroidEntryPoint
+class DoublePageReaderFragment : BaseReaderFragment<FragmentReaderDoubleBinding>() {
+
+	@Inject
+	lateinit var networkState: NetworkState
+
+	@Inject
+	lateinit var pageLoader: PageLoader
+
+	override fun onCreateViewBinding(
+		inflater: LayoutInflater,
+		container: ViewGroup?,
+	) = FragmentReaderDoubleBinding.inflate(inflater, container, false)
+
+	override fun onViewBindingCreated(
+		binding: FragmentReaderDoubleBinding,
+		savedInstanceState: Bundle?,
+	) {
+		super.onViewBindingCreated(binding, savedInstanceState)
+		with(binding.recyclerView) {
+			adapter = readerAdapter
+			addOnScrollListener(PageScrollListener())
+			DoublePageSnapHelper().attachToRecyclerView(this)
+		}
+	}
+
+	override fun onDestroyView() {
+		requireViewBinding().recyclerView.adapter = null
+		super.onDestroyView()
+	}
+
+	override suspend fun onPagesChanged(pages: List<ReaderPage>, pendingState: ReaderState?) =
+		coroutineScope {
+			val items = async {
+				requireAdapter().setItems(pages)
+				yield()
+			}
+			if (pendingState != null) {
+				val position = pages.indexOfFirst {
+					it.chapterId == pendingState.chapterId && it.index == pendingState.page
+				}
+				items.await()
+				if (position != -1) {
+					requireViewBinding().recyclerView.firstVisibleItemPosition = position or 1
+					notifyPageChanged(position)
+				} else {
+					Snackbar.make(requireView(), R.string.not_found_404, Snackbar.LENGTH_SHORT)
+						.show()
+				}
+			} else {
+				items.await()
+			}
+		}
+
+	override fun onCreateAdapter() = DoublePagesAdapter(
+		lifecycleOwner = viewLifecycleOwner,
+		loader = pageLoader,
+		settings = viewModel.readerSettings,
+		networkState = networkState,
+		exceptionResolver = exceptionResolver,
+	)
+
+	override fun switchPageBy(delta: Int) {
+		switchPageTo((requireViewBinding().recyclerView.currentItem() + delta) or 1, delta.absoluteValue > 1)
+	}
+
+	override fun switchPageTo(position: Int, smooth: Boolean) {
+		requireViewBinding().recyclerView.firstVisibleItemPosition = position or 1
+	}
+
+	override fun getCurrentState(): ReaderState? = viewBinding?.run {
+		val adapter = recyclerView.adapter as? BaseReaderAdapter<*>
+		val page = adapter?.getItemOrNull(recyclerView.currentItem()) ?: return@run null
+		ReaderState(
+			chapterId = page.chapterId,
+			page = page.index,
+			scroll = 0,
+		)
+	}
+
+	private fun notifyPageChanged(page: Int) {
+		viewModel.onCurrentPageChanged(page)
+	}
+
+	private fun RecyclerView.currentItem(): Int {
+		val lm = layoutManager as LinearLayoutManager
+		return ((lm.findFirstVisibleItemPosition() + lm.findLastVisibleItemPosition()) / 2f).toIntUp()
+	}
+
+	private inner class PageScrollListener : RecyclerView.OnScrollListener() {
+
+		private var lastPage = RecyclerView.NO_POSITION
+
+		override fun onScrolled(recyclerView: RecyclerView, dx: Int, dy: Int) {
+			super.onScrolled(recyclerView, dx, dy)
+			val page = recyclerView.currentItem()
+			if (page != lastPage) {
+				lastPage = page
+				notifyPageChanged(page)
+			}
+		}
+	}
+}

app/src/main/kotlin/org/koitharu/kotatsu/reader/ui/pager/doublepage/DoublePageSnapHelper.kt

@@ -0,0 +1,280 @@
+package org.koitharu.kotatsu.reader.ui.pager.doublepage
+
+import android.util.DisplayMetrics
+import android.view.View
+import android.view.animation.Interpolator
+import android.widget.Scroller
+import androidx.core.view.ViewCompat
+import androidx.recyclerview.widget.GridLayoutManager
+import androidx.recyclerview.widget.LinearLayoutManager
+import androidx.recyclerview.widget.LinearSmoothScroller
+import androidx.recyclerview.widget.OrientationHelper
+import androidx.recyclerview.widget.RecyclerView
+import androidx.recyclerview.widget.RecyclerView.SmoothScroller.ScrollVectorProvider
+import androidx.recyclerview.widget.SnapHelper
+import kotlin.math.abs
+import kotlin.math.max
+import kotlin.math.roundToInt
+
+class DoublePageSnapHelper : SnapHelper() {
+
+	private lateinit var recyclerView: RecyclerView
+
+	// Total number of items in a block of view in the RecyclerView
+	private var blockSize = 2
+
+	// Maximum number of positions to move on a fling.
+	private var maxPositionsToMove = 0
+
+	// Width of a RecyclerView item if orientation is horizontal; height of the item if vertical
+	private var itemDimension = 0
+
+	// Maxim blocks to move during most vigorous fling.
+	private val maxFlingBlocks = 2
+
+	// When snapping, used to determine direction of snap.
+	private var priorFirstPosition = RecyclerView.NO_POSITION
+
+	// Our private scroller
+	private var scroller: Scroller? = null
+
+	// Horizontal/vertical layout helper
+	private lateinit var orientationHelper: OrientationHelper
+
+	// LTR/RTL helper
+	private lateinit var layoutDirectionHelper: LayoutDirectionHelper
+
+	private val snapInterpolator = Interpolator { input ->
+		var t = input
+		t -= 1.0f
+		t * t * t + 1.0f
+	}
+
+	@Throws(IllegalStateException::class)
+	override fun attachToRecyclerView(target: RecyclerView?) {
+		if (target != null) {
+			recyclerView = target
+			val layoutManager = recyclerView.layoutManager as LinearLayoutManager
+			check(layoutManager.canScrollHorizontally()) { "RecyclerView must be scrollable" }
+			orientationHelper = OrientationHelper.createHorizontalHelper(layoutManager)
+			layoutDirectionHelper = LayoutDirectionHelper(ViewCompat.getLayoutDirection(recyclerView))
+			scroller = Scroller(target.context, snapInterpolator)
+			initItemDimensionIfNeeded(layoutManager)
+		}
+		super.attachToRecyclerView(recyclerView)
+	}
+
+	override fun calculateDistanceToFinalSnap(
+		layoutManager: RecyclerView.LayoutManager,
+		targetView: View
+	): IntArray {
+		val out = IntArray(2)
+		if (layoutManager.canScrollHorizontally()) {
+			out[0] = layoutDirectionHelper.getScrollToAlignView(targetView)
+		}
+		if (layoutManager.canScrollVertically()) {
+			out[1] = layoutDirectionHelper.getScrollToAlignView(targetView)
+		}
+		return out
+	}
+
+	// We are flinging and need to know where we are heading.
+	override fun findTargetSnapPosition(
+		layoutManager: RecyclerView.LayoutManager,
+		velocityX: Int, velocityY: Int
+	): Int {
+		val lm = layoutManager as LinearLayoutManager
+		initItemDimensionIfNeeded(layoutManager)
+		scroller!!.fling(0, 0, velocityX, velocityY, Int.MIN_VALUE, Int.MAX_VALUE, Int.MIN_VALUE, Int.MAX_VALUE)
+		if (velocityX != 0) {
+			return layoutDirectionHelper
+				.getPositionsToMove(lm, scroller!!.finalX, itemDimension)
+		}
+		return if (velocityY != 0) {
+			layoutDirectionHelper
+				.getPositionsToMove(lm, scroller!!.finalY, itemDimension)
+		} else RecyclerView.NO_POSITION
+	}
+
+	// We have scrolled to the neighborhood where we will snap. Determine the snap position.
+	override fun findSnapView(layoutManager: RecyclerView.LayoutManager): View? {
+		// Snap to a view that is either 1) toward the bottom of the data and therefore on screen,
+		// or, 2) toward the top of the data and may be off-screen.
+		val snapPos: Int = calcTargetPosition(layoutManager as LinearLayoutManager)
+		return if (snapPos == RecyclerView.NO_POSITION) null else layoutManager.findViewByPosition(snapPos)
+	}
+
+	// Does the heavy lifting for findSnapView.
+	private fun calcTargetPosition(layoutManager: LinearLayoutManager): Int {
+		val snapPos: Int
+		val firstVisiblePos = layoutManager.findFirstVisibleItemPosition()
+		if (firstVisiblePos == RecyclerView.NO_POSITION) {
+			return RecyclerView.NO_POSITION
+		}
+		initItemDimensionIfNeeded(layoutManager)
+		if (firstVisiblePos >= priorFirstPosition) {
+			// Scrolling toward bottom of data
+			val firstCompletePosition = layoutManager.findFirstCompletelyVisibleItemPosition()
+			snapPos = if (firstCompletePosition != RecyclerView.NO_POSITION
+				&& firstCompletePosition % blockSize == 0
+			) {
+				firstCompletePosition
+			} else {
+				roundDownToBlockSize(firstVisiblePos + blockSize)
+			}
+		} else {
+			// Scrolling toward top of data
+			snapPos = roundDownToBlockSize(firstVisiblePos)
+			// Check to see if target view exists. If it doesn't, force a smooth scroll.
+			// SnapHelper only snaps to existing views and will not scroll to a non-existent one.
+			// If limiting fling to single block, then the following is not needed since the
+			// views are likely to be in the RecyclerView pool.
+			if (layoutManager.findViewByPosition(snapPos) == null) {
+				val toScroll: IntArray = layoutDirectionHelper.calculateDistanceToScroll(layoutManager, snapPos)
+				recyclerView.smoothScrollBy(toScroll[0], toScroll[1], snapInterpolator)
+			}
+		}
+		priorFirstPosition = firstVisiblePos
+		return snapPos
+	}
+
+	private fun initItemDimensionIfNeeded(layoutManager: RecyclerView.LayoutManager) {
+		if (itemDimension != 0) {
+			return
+		}
+		val child: View = layoutManager.getChildAt(0) ?: return
+		if (layoutManager.canScrollHorizontally()) {
+			itemDimension = child.width
+			blockSize = getSpanCount(layoutManager) * (recyclerView.width / itemDimension)
+		} else if (layoutManager.canScrollVertically()) {
+			itemDimension = child.height
+			blockSize = getSpanCount(layoutManager) * (recyclerView.height / itemDimension)
+		}
+		maxPositionsToMove = blockSize * maxFlingBlocks
+	}
+
+	private fun getSpanCount(layoutManager: RecyclerView.LayoutManager): Int {
+		return if (layoutManager is GridLayoutManager) layoutManager.spanCount else 1
+	}
+
+	private fun roundDownToBlockSize(trialPosition: Int): Int {
+		return trialPosition - trialPosition % blockSize
+	}
+
+	private fun roundUpToBlockSize(trialPosition: Int): Int {
+		return roundDownToBlockSize(trialPosition + blockSize - 1)
+	}
+
+	override fun createScroller(layoutManager: RecyclerView.LayoutManager): RecyclerView.SmoothScroller? {
+		return if (layoutManager !is ScrollVectorProvider) {
+			null
+		} else object : LinearSmoothScroller(recyclerView.context) {
+			override fun onTargetFound(targetView: View, state: RecyclerView.State, action: Action) {
+				val snapDistances = calculateDistanceToFinalSnap(
+					recyclerView.layoutManager!!,
+					targetView,
+				)
+				val dx = snapDistances[0]
+				val dy = snapDistances[1]
+				val time = calculateTimeForDeceleration(
+					max(abs(dx.toDouble()), abs(dy.toDouble()))
+						.toInt(),
+				)
+				if (time > 0) {
+					action.update(dx, dy, time, snapInterpolator)
+				}
+			}
+
+			override fun calculateSpeedPerPixel(displayMetrics: DisplayMetrics): Float {
+				return 40f / displayMetrics.densityDpi
+			}
+		}
+	}
+
+	/*
+		Helper class that handles calculations for LTR and RTL layouts.
+	 */
+	private inner class LayoutDirectionHelper(direction: Int) {
+
+		// Is the layout an RTL one?
+		private val mIsRTL: Boolean
+
+		init {
+			mIsRTL = direction == View.LAYOUT_DIRECTION_RTL
+		}
+
+		/*
+			Calculate the amount of scroll needed to align the target view with the layout edge.
+		 */
+		fun getScrollToAlignView(targetView: View?): Int {
+			return if (mIsRTL) orientationHelper.getDecoratedEnd(targetView) - recyclerView.width else orientationHelper.getDecoratedStart(
+				targetView,
+			)
+		}
+
+		/**
+		 * Calculate the distance to final snap position when the view corresponding to the snap
+		 * position is not currently available.
+		 *
+		 * @param layoutManager LinearLayoutManager or descendant class
+		 * @param targetPos     - Adapter position to snap to
+		 * @return int[2] {x-distance in pixels, y-distance in pixels}
+		 */
+		fun calculateDistanceToScroll(layoutManager: LinearLayoutManager, targetPos: Int): IntArray {
+			val out = IntArray(2)
+			val firstVisiblePos = layoutManager.findFirstVisibleItemPosition()
+			if (layoutManager.canScrollHorizontally()) {
+				if (targetPos <= firstVisiblePos) { // scrolling toward top of data
+					if (mIsRTL) {
+						val lastView = layoutManager.findViewByPosition(layoutManager.findLastVisibleItemPosition())
+						out[0] = (orientationHelper.getDecoratedEnd(lastView)
+							+ (firstVisiblePos - targetPos) * itemDimension)
+					} else {
+						val firstView = layoutManager.findViewByPosition(firstVisiblePos)
+						out[0] = (orientationHelper.getDecoratedStart(firstView)
+							- (firstVisiblePos - targetPos) * itemDimension)
+					}
+				}
+			}
+			if (layoutManager.canScrollVertically()) {
+				if (targetPos <= firstVisiblePos) { // scrolling toward top of data
+					val firstView = layoutManager.findViewByPosition(firstVisiblePos)
+					out[1] = firstView!!.top - (firstVisiblePos - targetPos) * itemDimension
+				}
+			}
+			return out
+		}
+
+		/*
+			Calculate the number of positions to move in the RecyclerView given a scroll amount
+			and the size of the items to be scrolled. Return integral multiple of mBlockSize not
+			equal to zero.
+		 */
+		fun getPositionsToMove(llm: LinearLayoutManager, scroll: Int, itemSize: Int): Int {
+			var positionsToMove: Int
+			positionsToMove = roundUpToBlockSize(abs((scroll.toDouble()) / itemSize).roundToInt())
+			if (positionsToMove < blockSize) {
+				// Must move at least one block
+				positionsToMove = blockSize
+			} else if (positionsToMove > maxPositionsToMove) {
+				// Clamp number of positions to move, so we don't get wild flinging.
+				positionsToMove = maxPositionsToMove
+			}
+			if (scroll < 0) {
+				positionsToMove *= -1
+			}
+			if (mIsRTL) {
+				positionsToMove *= -1
+			}
+			return if (layoutDirectionHelper.isDirectionToBottom(scroll < 0)) {
+				// Scrolling toward the bottom of data.
+				roundDownToBlockSize(llm.findFirstVisibleItemPosition()) + positionsToMove
+			} else roundDownToBlockSize(llm.findLastVisibleItemPosition()) + positionsToMove
+			// Scrolling toward the top of the data.
+		}
+
+		fun isDirectionToBottom(velocityNegative: Boolean): Boolean {
+			return if (mIsRTL) velocityNegative else !velocityNegative
+		}
+	}
+}

app/src/main/kotlin/org/koitharu/kotatsu/reader/ui/pager/doublepage/DoublePagesAdapter.kt

@@ -0,0 +1,35 @@
+package org.koitharu.kotatsu.reader.ui.pager.doublepage
+
+import android.view.LayoutInflater
+import android.view.ViewGroup
+import androidx.lifecycle.LifecycleOwner
+import org.koitharu.kotatsu.core.exceptions.resolve.ExceptionResolver
+import org.koitharu.kotatsu.core.os.NetworkState
+import org.koitharu.kotatsu.databinding.ItemPageBinding
+import org.koitharu.kotatsu.reader.domain.PageLoader
+import org.koitharu.kotatsu.reader.ui.config.ReaderSettings
+import org.koitharu.kotatsu.reader.ui.pager.BaseReaderAdapter
+
+class DoublePagesAdapter(
+	private val lifecycleOwner: LifecycleOwner,
+	loader: PageLoader,
+	settings: ReaderSettings,
+	networkState: NetworkState,
+	exceptionResolver: ExceptionResolver,
+) : BaseReaderAdapter<DoublePageHolder>(loader, settings, networkState, exceptionResolver) {
+
+	override fun onCreateViewHolder(
+		parent: ViewGroup,
+		loader: PageLoader,
+		settings: ReaderSettings,
+		networkState: NetworkState,
+		exceptionResolver: ExceptionResolver,
+	) = DoublePageHolder(
+		owner = lifecycleOwner,
+		binding = ItemPageBinding.inflate(LayoutInflater.from(parent.context), parent, false),
+		loader = loader,
+		settings = settings,
+		networkState = networkState,
+		exceptionResolver = exceptionResolver,
+	)
+}

app/src/main/kotlin/org/koitharu/kotatsu/reader/ui/pager/reversed/ReversedReaderFragment.kt

@@ -1,7 +1,12 @@
 package org.koitharu.kotatsu.reader.ui.pager.reversed
 
+import android.os.Build
 import android.os.Bundle
+import android.view.InputDevice
+import android.view.KeyEvent
 import android.view.LayoutInflater
+import android.view.MotionEvent
+import android.view.View
 import android.view.ViewGroup
 import androidx.core.view.children
 import com.google.android.material.snackbar.Snackbar
@@ -23,12 +28,15 @@ import org.koitharu.kotatsu.reader.ui.pager.BaseReaderAdapter
 import org.koitharu.kotatsu.reader.ui.pager.BaseReaderFragment
 import org.koitharu.kotatsu.reader.ui.pager.ReaderPage
 import org.koitharu.kotatsu.reader.ui.pager.standard.NoAnimPageTransformer
+import org.koitharu.kotatsu.reader.ui.pager.standard.PagerEventSupplier
 import org.koitharu.kotatsu.reader.ui.pager.standard.PagerReaderFragment
 import javax.inject.Inject
 import kotlin.math.absoluteValue
+import kotlin.math.sign
 
 @AndroidEntryPoint
-class ReversedReaderFragment : BaseReaderFragment<FragmentReaderStandardBinding>() {
+class ReversedReaderFragment : BaseReaderFragment<FragmentReaderStandardBinding>(),
+	View.OnGenericMotionListener {
 
 	@Inject
 	lateinit var networkState: NetworkState
@@ -47,6 +55,11 @@ class ReversedReaderFragment : BaseReaderFragment<FragmentReaderStandardBinding>
 			adapter = readerAdapter
 			offscreenPageLimit = 2
 			doOnPageChanged(::notifyPageChanged)
+			setOnGenericMotionListener(this@ReversedReaderFragment)
+			if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+				recyclerView?.defaultFocusHighlightEnabled = false
+			}
+			PagerEventSupplier(this).attach()
 		}
 
 		viewModel.pageAnimation.observe(viewLifecycleOwner) {
@@ -69,6 +82,20 @@ class ReversedReaderFragment : BaseReaderFragment<FragmentReaderStandardBinding>
 		super.onDestroyView()
 	}
 
+	override fun onGenericMotion(v: View?, event: MotionEvent): Boolean {
+		if (event.source and InputDevice.SOURCE_CLASS_POINTER != 0) {
+			if (event.actionMasked == MotionEvent.ACTION_SCROLL) {
+				val axisValue = event.getAxisValue(MotionEvent.AXIS_VSCROLL)
+				val withCtrl = event.metaState and KeyEvent.META_CTRL_MASK != 0
+				if (!withCtrl) {
+					switchPageBy(-axisValue.sign.toInt())
+					return true
+				}
+			}
+		}
+		return false
+	}
+
 	override fun onCreateAdapter() = ReversedPagesAdapter(
 		lifecycleOwner = viewLifecycleOwner,
 		loader = pageLoader,

app/src/main/kotlin/org/koitharu/kotatsu/reader/ui/pager/standard/PageHolder.kt

@@ -40,6 +40,12 @@ open class PageHolder(
 		@Suppress("LeakingThis")
 		bindingInfo.buttonErrorDetails.setOnClickListener(this)
 		binding.textViewNumber.isVisible = settings.isPagesNumbersEnabled
+		binding.zoomControl.listener = SsivZoomListener(binding.ssiv)
+	}
+
+	override fun onConfigChanged() {
+		super.onConfigChanged()
+		binding.zoomControl.isVisible = settings.isZoomControlsEnabled
 	}
 
 	@SuppressLint("SetTextI18n")

app/src/main/kotlin/org/koitharu/kotatsu/reader/ui/pager/standard/PagerEventSupplier.kt

@@ -0,0 +1,24 @@
+package org.koitharu.kotatsu.reader.ui.pager.standard
+
+import android.view.KeyEvent
+import android.view.View
+import android.view.ViewGroup
+import androidx.core.view.children
+import androidx.viewpager2.widget.ViewPager2
+import com.davemorrissey.labs.subscaleview.SubsamplingScaleImageView
+import org.koitharu.kotatsu.core.util.ext.recyclerView
+
+class PagerEventSupplier(private val pager: ViewPager2) : View.OnKeyListener {
+
+	fun attach() {
+		pager.recyclerView?.setOnKeyListener(this)
+	}
+
+	override fun onKey(v: View?, keyCode: Int, event: KeyEvent?): Boolean {
+		val rootView = pager.recyclerView?.findViewHolderForAdapterPosition(pager.currentItem)?.itemView as? ViewGroup
+			?: return false
+		return rootView.children.firstNotNullOfOrNull { x ->
+			x as? SubsamplingScaleImageView
+		}?.dispatchKeyEvent(event) == true
+	}
+}

app/src/main/kotlin/org/koitharu/kotatsu/reader/ui/pager/standard/PagerReaderFragment.kt

@@ -1,7 +1,12 @@
 package org.koitharu.kotatsu.reader.ui.pager.standard
 
+import android.os.Build
 import android.os.Bundle
+import android.view.InputDevice
+import android.view.KeyEvent
 import android.view.LayoutInflater
+import android.view.MotionEvent
+import android.view.View
 import android.view.ViewGroup
 import androidx.core.view.children
 import com.google.android.material.snackbar.Snackbar
@@ -24,9 +29,11 @@ import org.koitharu.kotatsu.reader.ui.pager.BaseReaderFragment
 import org.koitharu.kotatsu.reader.ui.pager.ReaderPage
 import javax.inject.Inject
 import kotlin.math.absoluteValue
+import kotlin.math.sign
 
 @AndroidEntryPoint
-class PagerReaderFragment : BaseReaderFragment<FragmentReaderStandardBinding>() {
+class PagerReaderFragment : BaseReaderFragment<FragmentReaderStandardBinding>(),
+	View.OnGenericMotionListener {
 
 	@Inject
 	lateinit var networkState: NetworkState
@@ -39,12 +46,20 @@ class PagerReaderFragment : BaseReaderFragment<FragmentReaderStandardBinding>()
 		container: ViewGroup?,
 	) = FragmentReaderStandardBinding.inflate(inflater, container, false)
 
-	override fun onViewBindingCreated(binding: FragmentReaderStandardBinding, savedInstanceState: Bundle?) {
+	override fun onViewBindingCreated(
+		binding: FragmentReaderStandardBinding,
+		savedInstanceState: Bundle?,
+	) {
 		super.onViewBindingCreated(binding, savedInstanceState)
 		with(binding.pager) {
 			adapter = readerAdapter
 			offscreenPageLimit = 2
 			doOnPageChanged(::notifyPageChanged)
+			setOnGenericMotionListener(this@PagerReaderFragment)
+			if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+				recyclerView?.defaultFocusHighlightEnabled = false
+			}
+			PagerEventSupplier(this).attach()
 		}
 
 		viewModel.pageAnimation.observe(viewLifecycleOwner) {
@@ -67,28 +82,43 @@ class PagerReaderFragment : BaseReaderFragment<FragmentReaderStandardBinding>()
 		super.onDestroyView()
 	}
 
-	override suspend fun onPagesChanged(pages: List<ReaderPage>, pendingState: ReaderState?) = coroutineScope {
+	override fun onGenericMotion(v: View?, event: MotionEvent): Boolean {
-		val items = async {
+		if (event.source and InputDevice.SOURCE_CLASS_POINTER != 0) {
-			requireAdapter().setItems(pages)
+			if (event.actionMasked == MotionEvent.ACTION_SCROLL) {
-			yield()
+				val axisValue = event.getAxisValue(MotionEvent.AXIS_VSCROLL)
-		}
+				val withCtrl = event.metaState and KeyEvent.META_CTRL_MASK != 0
-		if (pendingState != null) {
+				if (!withCtrl) {
-			val position = pages.indexOfFirst {
+					switchPageBy(-axisValue.sign.toInt())
-				it.chapterId == pendingState.chapterId && it.index == pendingState.page
+					return true
+				}
 			}
-			items.await()
-			if (position != -1) {
-				requireViewBinding().pager.setCurrentItem(position, false)
-				notifyPageChanged(position)
-			} else {
-				Snackbar.make(requireView(), R.string.not_found_404, Snackbar.LENGTH_SHORT)
-					.show()
-			}
-		} else {
-			items.await()
 		}
+		return false
 	}
 
+	override suspend fun onPagesChanged(pages: List<ReaderPage>, pendingState: ReaderState?) =
+		coroutineScope {
+			val items = async {
+				requireAdapter().setItems(pages)
+				yield()
+			}
+			if (pendingState != null) {
+				val position = pages.indexOfFirst {
+					it.chapterId == pendingState.chapterId && it.index == pendingState.page
+				}
+				items.await()
+				if (position != -1) {
+					requireViewBinding().pager.setCurrentItem(position, false)
+					notifyPageChanged(position)
+				} else {
+					Snackbar.make(requireView(), R.string.not_found_404, Snackbar.LENGTH_SHORT)
+						.show()
+				}
+			} else {
+				items.await()
+			}
+		}
+
 	override fun onCreateAdapter() = PagesAdapter(
 		lifecycleOwner = viewLifecycleOwner,
 		loader = pageLoader,

app/src/main/kotlin/org/koitharu/kotatsu/reader/ui/pager/standard/SsivZoomListener.kt

@@ -0,0 +1,28 @@
+package org.koitharu.kotatsu.reader.ui.pager.standard
+
+import android.view.animation.DecelerateInterpolator
+import com.davemorrissey.labs.subscaleview.SubsamplingScaleImageView
+import org.koitharu.kotatsu.core.ui.widgets.ZoomControl
+
+class SsivZoomListener(
+	private val ssiv: SubsamplingScaleImageView,
+) : ZoomControl.ZoomControlListener {
+
+	override fun onZoomIn() {
+		scaleBy(1.2f)
+	}
+
+	override fun onZoomOut() {
+		scaleBy(0.8f)
+	}
+
+	private fun scaleBy(factor: Float) {
+		val center = ssiv.getCenter() ?: return
+		val newScale = ssiv.scale * factor
+		ssiv.animateScaleAndCenter(newScale, center)?.apply {
+			withDuration(ssiv.resources.getInteger(android.R.integer.config_shortAnimTime).toLong())
+			withInterpolator(DecelerateInterpolator())
+			start()
+		}
+	}
+}

app/src/main/kotlin/org/koitharu/kotatsu/reader/ui/pager/webtoon/WebtoonFrameLayout.kt

@@ -12,8 +12,8 @@ class WebtoonFrameLayout @JvmOverloads constructor(
 	@AttrRes defStyleAttr: Int = 0,
 ) : FrameLayout(context, attrs, defStyleAttr) {
 
-	val target by lazy(LazyThreadSafetyMode.NONE) {
+	val target: WebtoonImageView by lazy(LazyThreadSafetyMode.NONE) {
-		findViewById<WebtoonImageView>(R.id.ssiv)
+		findViewById(R.id.ssiv)
 	}
 
 	fun dispatchVerticalScroll(dy: Int): Int {

app/src/main/kotlin/org/koitharu/kotatsu/reader/ui/pager/webtoon/WebtoonImageView.kt

@@ -3,9 +3,9 @@ package org.koitharu.kotatsu.reader.ui.pager.webtoon
 import android.content.Context
 import android.graphics.PointF
 import android.util.AttributeSet
+import androidx.core.view.ancestors
 import androidx.recyclerview.widget.RecyclerView
 import com.davemorrissey.labs.subscaleview.SubsamplingScaleImageView
-import org.koitharu.kotatsu.core.util.ext.parents
 import org.koitharu.kotatsu.parsers.util.toIntUp
 
 private const val SCROLL_UNKNOWN = -1
@@ -93,7 +93,7 @@ class WebtoonImageView @JvmOverloads constructor(
 		if (oldh == h || oldw == 0 || oldh == 0 || scrollRange == SCROLL_UNKNOWN) return
 
 		computeScrollRange()
-		val container = parents.firstNotNullOfOrNull { it as? WebtoonFrameLayout } ?: return
+		val container = ancestors.firstNotNullOfOrNull { it as? WebtoonFrameLayout } ?: return
 		val parentHeight = parentHeight()
 		if (scrollPos != 0 && container.bottom < parentHeight) {
 			scrollTo(scrollRange)
@@ -115,6 +115,6 @@ class WebtoonImageView @JvmOverloads constructor(
 	}
 
 	private fun parentHeight(): Int {
-		return parents.firstNotNullOfOrNull { it as? RecyclerView }?.height ?: 0
+		return ancestors.firstNotNullOfOrNull { it as? RecyclerView }?.height ?: 0
 	}
 }

app/src/main/kotlin/org/koitharu/kotatsu/reader/ui/pager/webtoon/WebtoonReaderFragment.kt

@@ -3,11 +3,13 @@ package org.koitharu.kotatsu.reader.ui.pager.webtoon
 import android.os.Bundle
 import android.view.LayoutInflater
 import android.view.ViewGroup
-import android.view.animation.AccelerateDecelerateInterpolator
+import android.view.animation.DecelerateInterpolator
+import androidx.core.view.isVisible
 import com.google.android.material.snackbar.Snackbar
 import dagger.hilt.android.AndroidEntryPoint
 import kotlinx.coroutines.async
 import kotlinx.coroutines.coroutineScope
+import kotlinx.coroutines.flow.combine
 import kotlinx.coroutines.yield
 import org.koitharu.kotatsu.R
 import org.koitharu.kotatsu.core.os.NetworkState
@@ -31,7 +33,7 @@ class WebtoonReaderFragment : BaseReaderFragment<FragmentReaderWebtoonBinding>()
 	@Inject
 	lateinit var pageLoader: PageLoader
 
-	private val scrollInterpolator = AccelerateDecelerateInterpolator()
+	private val scrollInterpolator = DecelerateInterpolator()
 
 	override fun onCreateViewBinding(
 		inflater: LayoutInflater,
@@ -45,10 +47,15 @@ class WebtoonReaderFragment : BaseReaderFragment<FragmentReaderWebtoonBinding>()
 			adapter = readerAdapter
 			addOnPageScrollListener(PageScrollListener())
 		}
+		binding.zoomControl.listener = binding.frame
 
 		viewModel.isWebtoonZoomEnabled.observe(viewLifecycleOwner) {
 			binding.frame.isZoomEnable = it
 		}
+		combine(viewModel.isWebtoonZoomEnabled, viewModel.isZoomControlEnabled, Boolean::and)
+			.observe(viewLifecycleOwner) {
+				binding.zoomControl.isVisible = it
+			}
 	}
 
 	override fun onDestroyView() {
@@ -122,8 +129,12 @@ class WebtoonReaderFragment : BaseReaderFragment<FragmentReaderWebtoonBinding>()
 		requireViewBinding().recyclerView.firstVisibleItemPosition = position
 	}
 
-	override fun scrollBy(delta: Int): Boolean {
+	override fun scrollBy(delta: Int, smooth: Boolean): Boolean {
-		requireViewBinding().recyclerView.nestedScrollBy(0, delta)
+		if (smooth && isAnimationEnabled()) {
+			requireViewBinding().recyclerView.smoothScrollBy(0, delta, scrollInterpolator)
+		} else {
+			requireViewBinding().recyclerView.nestedScrollBy(0, delta)
+		}
 		return true
 	}
 

app/src/main/kotlin/org/koitharu/kotatsu/reader/ui/pager/webtoon/WebtoonScalingFrame.kt

@@ -7,12 +7,19 @@ import android.graphics.Rect
 import android.graphics.RectF
 import android.util.AttributeSet
 import android.view.GestureDetector
+import android.view.InputDevice
+import android.view.KeyEvent
 import android.view.MotionEvent
 import android.view.ScaleGestureDetector
+import android.view.ViewConfiguration
 import android.view.animation.AccelerateDecelerateInterpolator
+import android.view.animation.DecelerateInterpolator
 import android.widget.FrameLayout
 import android.widget.OverScroller
 import androidx.core.view.GestureDetectorCompat
+import androidx.core.view.ViewConfigurationCompat
+import org.koitharu.kotatsu.core.ui.widgets.ZoomControl
+import org.koitharu.kotatsu.core.util.ext.getAnimationDuration
 
 private const val MAX_SCALE = 2.5f
 private const val MIN_SCALE = 0.5f
@@ -21,7 +28,9 @@ class WebtoonScalingFrame @JvmOverloads constructor(
 	context: Context,
 	attrs: AttributeSet? = null,
 	defStyles: Int = 0,
-) : FrameLayout(context, attrs, defStyles), ScaleGestureDetector.OnScaleGestureListener {
+) : FrameLayout(context, attrs, defStyles),
+	ScaleGestureDetector.OnScaleGestureListener,
+	ZoomControl.ZoomControlListener {
 
 	private val targetChild by lazy(LazyThreadSafetyMode.NONE) { getChildAt(0) as WebtoonRecyclerView }
 
@@ -40,6 +49,7 @@ class WebtoonScalingFrame @JvmOverloads constructor(
 	private var halfHeight = 0f
 	private val translateBounds = RectF()
 	private val targetHitRect = Rect()
+	private var animator: ValueAnimator? = null
 
 	var isZoomEnable = true
 		set(value) {
@@ -77,10 +87,79 @@ class WebtoonScalingFrame @JvmOverloads constructor(
 		return super.dispatchTouchEvent(ev)
 	}
 
-	override fun onMeasure(widthMeasureSpec: Int, heightMeasureSpec: Int) {
+	override fun onGenericMotionEvent(event: MotionEvent): Boolean {
-		super.onMeasure(widthMeasureSpec, heightMeasureSpec)
+		if (isZoomEnable && event.source and InputDevice.SOURCE_CLASS_POINTER != 0) {
-		halfWidth = measuredWidth / 2f
+			if (event.actionMasked == MotionEvent.ACTION_SCROLL) {
-		halfHeight = measuredHeight / 2f
+				val withCtrl = event.metaState and KeyEvent.META_CTRL_MASK != 0
+				if (withCtrl) {
+					val axisValue =
+						event.getAxisValue(MotionEvent.AXIS_VSCROLL) * ViewConfigurationCompat.getScaledVerticalScrollFactor(
+							ViewConfiguration.get(context), context,
+						)
+					val newScale = (scale + axisValue).coerceIn(MIN_SCALE, MAX_SCALE)
+					scaleChild(newScale, event.x, event.y)
+					return true
+				}
+			}
+		}
+		return super.onGenericMotionEvent(event)
+	}
+
+	override fun onKeyDown(keyCode: Int, event: KeyEvent?): Boolean {
+		if (!isZoomEnable) {
+			return super.onKeyDown(keyCode, event)
+		}
+		return when (keyCode) {
+			KeyEvent.KEYCODE_ZOOM_IN,
+			KeyEvent.KEYCODE_NUMPAD_ADD,
+			KeyEvent.KEYCODE_PLUS -> {
+				onZoomIn()
+				true
+			}
+
+			KeyEvent.KEYCODE_ZOOM_OUT,
+			KeyEvent.KEYCODE_NUMPAD_SUBTRACT,
+			KeyEvent.KEYCODE_MINUS -> {
+				onZoomOut()
+				true
+			}
+
+			KeyEvent.KEYCODE_ESCAPE -> {
+				smoothScaleTo(1f)
+				true
+			}
+
+			else -> super.onKeyDown(keyCode, event)
+		}
+	}
+
+	override fun onKeyUp(keyCode: Int, event: KeyEvent?): Boolean {
+		return if (isZoomEnable) {
+			keyCode == KeyEvent.KEYCODE_NUMPAD_ADD
+				|| keyCode == KeyEvent.KEYCODE_PLUS
+				|| keyCode == KeyEvent.KEYCODE_NUMPAD_SUBTRACT
+				|| keyCode == KeyEvent.KEYCODE_MINUS
+				|| keyCode == KeyEvent.KEYCODE_ZOOM_IN
+				|| keyCode == KeyEvent.KEYCODE_ZOOM_OUT
+				|| keyCode == KeyEvent.KEYCODE_ESCAPE
+				|| super.onKeyUp(keyCode, event)
+		} else {
+			super.onKeyUp(keyCode, event)
+		}
+	}
+
+	override fun onSizeChanged(w: Int, h: Int, oldw: Int, oldh: Int) {
+		super.onSizeChanged(w, h, oldw, oldh)
+		halfWidth = w / 2f
+		halfHeight = h / 2f
+	}
+
+	override fun onZoomIn() {
+		smoothScaleTo(scale * 1.1f)
+	}
+
+	override fun onZoomOut() {
+		smoothScaleTo(scale * 0.9f)
 	}
 
 	private fun invalidateTarget() {
@@ -154,14 +233,33 @@ class WebtoonScalingFrame @JvmOverloads constructor(
 		return true
 	}
 
-	override fun onScaleBegin(detector: ScaleGestureDetector): Boolean = true
+	override fun onScaleBegin(detector: ScaleGestureDetector): Boolean {
+		animator?.cancel()
+		animator = null
+		return true
+	}
 
 	override fun onScaleEnd(p0: ScaleGestureDetector) = Unit
 
+	private fun smoothScaleTo(target: Float) {
+		val newScale = target.coerceIn(MIN_SCALE, MAX_SCALE)
+		animator?.cancel()
+		animator = ValueAnimator.ofFloat(scale, newScale).apply {
+			setDuration(context.getAnimationDuration(android.R.integer.config_shortAnimTime))
+			interpolator = DecelerateInterpolator()
+			addUpdateListener { scaleChild(it.animatedValue as Float, halfWidth, halfHeight) }
+			start()
+		}
+	}
 
 	private inner class GestureListener : GestureDetector.SimpleOnGestureListener(), Runnable {
 
-		override fun onScroll(e1: MotionEvent?, e2: MotionEvent, distanceX: Float, distanceY: Float): Boolean {
+		override fun onScroll(
+			e1: MotionEvent?,
+			e2: MotionEvent,
+			distanceX: Float,
+			distanceY: Float,
+		): Boolean {
 			if (scale <= 1f) return false
 			transformMatrix.postTranslate(-distanceX, -distanceY)
 			invalidateTarget()
@@ -181,7 +279,12 @@ class WebtoonScalingFrame @JvmOverloads constructor(
 			return true
 		}
 
-		override fun onFling(e1: MotionEvent?, e2: MotionEvent, velocityX: Float, velocityY: Float): Boolean {
+		override fun onFling(
+			e1: MotionEvent?,
+			e2: MotionEvent,
+			velocityX: Float,
+			velocityY: Float,
+		): Boolean {
 			if (scale <= 1) return false
 
 			overScroller.fling(
@@ -200,7 +303,10 @@ class WebtoonScalingFrame @JvmOverloads constructor(
 
 		override fun run() {
 			if (overScroller.computeScrollOffset()) {
-				transformMatrix.postTranslate(overScroller.currX - transX, overScroller.currY - transY)
+				transformMatrix.postTranslate(
+					overScroller.currX - transX,
+					overScroller.currY - transY,
+				)
 				invalidateTarget()
 				postOnAnimation(this)
 			}

app/src/main/kotlin/org/koitharu/kotatsu/reader/ui/thumbnails/PagesThumbnailsSheet.kt

@@ -24,6 +24,7 @@ import org.koitharu.kotatsu.core.util.ext.observe
 import org.koitharu.kotatsu.core.util.ext.observeEvent
 import org.koitharu.kotatsu.core.util.ext.plus
 import org.koitharu.kotatsu.core.util.ext.showDistinct
+import org.koitharu.kotatsu.core.util.ext.showOrHide
 import org.koitharu.kotatsu.core.util.ext.withArgs
 import org.koitharu.kotatsu.databinding.SheetPagesBinding
 import org.koitharu.kotatsu.list.ui.MangaListSpanResolver
@@ -84,6 +85,7 @@ class PagesThumbnailsSheet :
 		viewModel.thumbnails.observe(viewLifecycleOwner, ::onThumbnailsChanged)
 		viewModel.branch.observe(viewLifecycleOwner, ::updateTitle)
 		viewModel.onError.observeEvent(viewLifecycleOwner, SnackbarErrorObserver(binding.recyclerView, this))
+		viewModel.isLoading.observe(viewLifecycleOwner) { binding.progressBar.showOrHide(it) }
 	}
 
 	override fun onDestroyView() {
@@ -150,13 +152,6 @@ class PagesThumbnailsSheet :
 		override fun onScrolledToEnd(recyclerView: RecyclerView) {
 			viewModel.loadNextChapter()
 		}
-
-		override fun onPostScrolled(recyclerView: RecyclerView, firstVisibleItemPosition: Int, visibleItemCount: Int) {
-			super.onPostScrolled(recyclerView, firstVisibleItemPosition, visibleItemCount)
-			if (firstVisibleItemPosition > offsetTop) {
-				viewModel.allowLoadAbove()
-			}
-		}
 	}
 
 	private inner class SpanSizeLookup : GridLayoutManager.SpanSizeLookup() {
@@ -190,7 +185,7 @@ class PagesThumbnailsSheet :
 
 		fun show(fm: FragmentManager, manga: Manga, chapterId: Long, currentPage: Int = -1) {
 			PagesThumbnailsSheet().withArgs(3) {
-				putParcelable(ARG_MANGA, ParcelableManga(manga, withChapters = true))
+				putParcelable(ARG_MANGA, ParcelableManga(manga))
 				putLong(ARG_CHAPTER_ID, chapterId)
 				putInt(ARG_CURRENT_PAGE, currentPage)
 			}.showDistinct(fm, TAG)

app/src/main/kotlin/org/koitharu/kotatsu/reader/ui/thumbnails/PagesThumbnailsViewModel.kt

@@ -1,19 +1,25 @@
 package org.koitharu.kotatsu.reader.ui.thumbnails
 
 import androidx.lifecycle.SavedStateHandle
+import androidx.lifecycle.viewModelScope
 import dagger.hilt.android.lifecycle.HiltViewModel
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.Job
 import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.SharingStarted
+import kotlinx.coroutines.flow.filterNotNull
+import kotlinx.coroutines.flow.first
+import kotlinx.coroutines.flow.map
+import kotlinx.coroutines.flow.stateIn
+import org.koitharu.kotatsu.core.model.findById
 import org.koitharu.kotatsu.core.model.parcelable.ParcelableManga
 import org.koitharu.kotatsu.core.parser.MangaRepository
 import org.koitharu.kotatsu.core.ui.BaseViewModel
+import org.koitharu.kotatsu.core.util.ext.firstNotNull
 import org.koitharu.kotatsu.core.util.ext.require
 import org.koitharu.kotatsu.details.domain.DoubleMangaLoadUseCase
 import org.koitharu.kotatsu.list.ui.model.ListHeader
 import org.koitharu.kotatsu.list.ui.model.ListModel
-import org.koitharu.kotatsu.list.ui.model.LoadingFooter
-import org.koitharu.kotatsu.parsers.util.SuspendLazy
 import org.koitharu.kotatsu.reader.domain.ChaptersLoader
 import javax.inject.Inject
 
@@ -22,48 +28,39 @@ class PagesThumbnailsViewModel @Inject constructor(
 	savedStateHandle: SavedStateHandle,
 	mangaRepositoryFactory: MangaRepository.Factory,
 	private val chaptersLoader: ChaptersLoader,
-	private val doubleMangaLoadUseCase: DoubleMangaLoadUseCase,
+	doubleMangaLoadUseCase: DoubleMangaLoadUseCase,
 ) : BaseViewModel() {
 
-	private val currentPageIndex: Int = savedStateHandle[PagesThumbnailsSheet.ARG_CURRENT_PAGE] ?: -1
+	private val currentPageIndex: Int =
+		savedStateHandle[PagesThumbnailsSheet.ARG_CURRENT_PAGE] ?: -1
 	private val initialChapterId: Long = savedStateHandle[PagesThumbnailsSheet.ARG_CHAPTER_ID] ?: 0L
 	val manga = savedStateHandle.require<ParcelableManga>(PagesThumbnailsSheet.ARG_MANGA).manga
 
 	private val repository = mangaRepositoryFactory.create(manga.source)
-	private val mangaDetails = SuspendLazy {
+	private val mangaDetails = doubleMangaLoadUseCase(manga).map {
-		doubleMangaLoadUseCase(manga).let {
+		val b = manga.chapters?.findById(initialChapterId)?.branch
-			val b = manga.chapters?.find { ch -> ch.id == initialChapterId }?.branch
+		branch.value = b
-			branch.value = b
+		it.filterChapters(b)
-			it.filterChapters(b)
+	}.withErrorHandling()
-		}
+		.stateIn(viewModelScope, SharingStarted.Lazily, null)
-	}
 	private var loadingJob: Job? = null
 	private var loadingPrevJob: Job? = null
 	private var loadingNextJob: Job? = null
-	private var isLoadAboveAllowed = false
 
 	val thumbnails = MutableStateFlow<List<ListModel>>(emptyList())
 	val branch = MutableStateFlow<String?>(null)
 
 	init {
-		loadingJob = launchJob(Dispatchers.Default) {
+		loadingJob = launchLoadingJob(Dispatchers.Default) {
-			chaptersLoader.init(mangaDetails.get())
+			chaptersLoader.init(viewModelScope, mangaDetails.filterNotNull())
+			mangaDetails.first { x -> x?.hasChapter(initialChapterId) == true }
 			chaptersLoader.loadSingleChapter(initialChapterId)
 			updateList()
 		}
 	}
 
-	fun allowLoadAbove() {
-		if (!isLoadAboveAllowed) {
-			loadingJob = launchJob(Dispatchers.Default) {
-				isLoadAboveAllowed = true
-				updateList()
-			}
-		}
-	}
-
 	fun loadPrevChapter() {
-		if (!isLoadAboveAllowed || loadingJob?.isActive == true || loadingPrevJob?.isActive == true) {
+		if (loadingJob?.isActive == true || loadingPrevJob?.isActive == true) {
 			return
 		}
 		loadingPrevJob = loadPrevNextChapter(isNext = false)
@@ -78,23 +75,17 @@ class PagesThumbnailsViewModel @Inject constructor(
 
 	private fun loadPrevNextChapter(isNext: Boolean): Job = launchLoadingJob(Dispatchers.Default) {
 		val currentId = (if (isNext) chaptersLoader.last() else chaptersLoader.first()).chapterId
-		chaptersLoader.loadPrevNextChapter(mangaDetails.get(), currentId, isNext)
+		chaptersLoader.loadPrevNextChapter(mangaDetails.firstNotNull(), currentId, isNext)
 		updateList()
 	}
 
 	private suspend fun updateList() {
 		val snapshot = chaptersLoader.snapshot()
-		val mangaChapters = mangaDetails.tryGet().getOrNull()?.chapters.orEmpty()
-		val hasPrevChapter = isLoadAboveAllowed && snapshot.firstOrNull()?.chapterId != mangaChapters.firstOrNull()?.id
-		val hasNextChapter = snapshot.lastOrNull()?.chapterId != mangaChapters.lastOrNull()?.id
 		val pages = buildList(snapshot.size + chaptersLoader.size + 2) {
-			if (hasPrevChapter) {
-				add(LoadingFooter(-1))
-			}
 			var previousChapterId = 0L
 			for (page in snapshot) {
 				if (page.chapterId != previousChapterId) {
-					chaptersLoader.peekChapter(page.chapterId)?.let {
+					chaptersLoader.awaitChapter(page.chapterId)?.let {
 						add(ListHeader(it.name))
 					}
 					previousChapterId = page.chapterId
@@ -105,9 +96,6 @@ class PagesThumbnailsViewModel @Inject constructor(
 					page = page,
 				)
 			}
-			if (hasNextChapter) {
-				add(LoadingFooter(1))
-			}
 		}
 		thumbnails.value = pages
 	}

app/src/main/kotlin/org/koitharu/kotatsu/reader/ui/thumbnails/adapter/PageThumbnailAdapter.kt

@@ -8,7 +8,6 @@ import org.koitharu.kotatsu.core.ui.list.OnListItemClickListener
 import org.koitharu.kotatsu.core.ui.list.fastscroll.FastScroller
 import org.koitharu.kotatsu.list.ui.adapter.ListItemType
 import org.koitharu.kotatsu.list.ui.adapter.listHeaderAD
-import org.koitharu.kotatsu.list.ui.adapter.loadingFooterAD
 import org.koitharu.kotatsu.list.ui.model.ListHeader
 import org.koitharu.kotatsu.list.ui.model.ListModel
 import org.koitharu.kotatsu.reader.ui.thumbnails.PageThumbnail
@@ -22,7 +21,6 @@ class PageThumbnailAdapter(
 	init {
 		addDelegate(ListItemType.PAGE_THUMB, pageThumbnailAD(coil, lifecycleOwner, clickListener))
 		addDelegate(ListItemType.HEADER, listHeaderAD(null))
-		addDelegate(ListItemType.FOOTER_LOADING, loadingFooterAD())
 	}
 
 	override fun getSectionText(context: Context, position: Int): CharSequence? {