Merge branch 'master' into devel

(cherry picked from commit e7c9d1943d)

CONTRIBUTING.md

@@ -1,11 +1,12 @@
 ## Kotatsu contribution guidelines
 
-- If you want to fix bug or implement a new feature, that already mention in the [issues](https://github.com/KotatsuApp/Kotatsu/issues), please, assign this issue to you and/or comment about it.
-- Whether you have to implement new feature, please, open an issue or discussion regarding it to ensure it will be accepted.
-- Translations have to be managed using the [Weblate](https://hosted.weblate.org/engage/kotatsu/) platform.
-- In case you want to add a new manga source, refer to the [parsers repository](https://github.com/KotatsuApp/kotatsu-parsers).
++ If you want to **fix bugs** or **implement new features** that **already have an [issue card](https://github.com/KotatsuApp/Kotatsu/issues):** please assign this issue to you and/or comment about it.
++ If you want to **implement a new feature:** open an issue or discussion regarding it to ensure it will be accepted.
++ **Translations** have to be managed using the [Weblate](https://hosted.weblate.org/engage/kotatsu/) platform.
++ In case you want to **add a new manga source,** refer to the [parsers repository](https://github.com/KotatsuApp/kotatsu-parsers).
 
-Refactoring or some dev-faces improvements are also might be accepted, however please stick to the following principles:
-- Performance matters. In the case of choosing between source code beauty and performance, performance should be a priority. 
-- Please, do not modify readme and other information files (except for typos).
-- Avoid adding new dependencies unless required. APK size is important.
+**Refactoring** or some **dev-faces improvements** might also be accepted. However, please stick to the following principles:
+
++ **Performance matters.** In the case of choosing between source code beauty and performance, performance should be a priority. 
++ Please, **do not modify readme and other information files** (except for typos).
++ **Avoid adding new dependencies** unless required. APK size is important.

app/build.gradle

@@ -16,8 +16,8 @@ android {
 		applicationId 'org.koitharu.kotatsu'
 		minSdk = 21
 		targetSdk = 34
-		versionCode = 611
-		versionName = '6.6'
+		versionCode = 615
+		versionName = '6.6.6'
 		generatedDensities = []
 		testInstrumentationRunner 'org.koitharu.kotatsu.HiltTestRunner'
 		ksp {
@@ -82,7 +82,7 @@ afterEvaluate {
 }
 dependencies {
 	//noinspection GradleDependency
-	implementation('com.github.KotatsuApp:kotatsu-parsers:e03d0efe71') {
+	implementation('com.github.KotatsuApp:kotatsu-parsers:a8f9423307') {
 		exclude group: 'org.json', module: 'json'
 	}
 
@@ -94,17 +94,17 @@ dependencies {
 	implementation 'androidx.core:core-ktx:1.12.0'
 	implementation 'androidx.activity:activity-ktx:1.8.2'
 	implementation 'androidx.fragment:fragment-ktx:1.6.2'
-	implementation 'androidx.lifecycle:lifecycle-viewmodel-ktx:2.6.2'
-	implementation 'androidx.lifecycle:lifecycle-service:2.6.2'
-	implementation 'androidx.lifecycle:lifecycle-process:2.6.2'
+	implementation 'androidx.lifecycle:lifecycle-viewmodel-ktx:2.7.0'
+	implementation 'androidx.lifecycle:lifecycle-service:2.7.0'
+	implementation 'androidx.lifecycle:lifecycle-process:2.7.0'
 	implementation 'androidx.constraintlayout:constraintlayout:2.1.4'
 	implementation 'androidx.swiperefreshlayout:swiperefreshlayout:1.1.0'
 	implementation 'androidx.recyclerview:recyclerview:1.3.2'
 	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:1.11.0'
-	implementation 'androidx.lifecycle:lifecycle-common-java8:2.6.2'
+	implementation 'com.google.android.material:material:1.12.0-alpha03'
+	implementation 'androidx.lifecycle:lifecycle-common-java8:2.7.0'
 
 	implementation 'androidx.work:work-runtime:2.9.0'
 	//noinspection GradleDependency
@@ -138,8 +138,10 @@ dependencies {
 
 	implementation 'ch.acra:acra-http:5.11.3'
 	implementation 'ch.acra:acra-dialog:5.11.3'
+	compileOnly 'com.google.auto.service:auto-service-annotations:1.1.1'
+	ksp 'dev.zacsweers.autoservice:auto-service-ksp:1.1.0'
 
-	debugImplementation 'com.squareup.leakcanary:leakcanary-android:2.12'
+	debugImplementation 'com.squareup.leakcanary:leakcanary-android:2.13'
 
 	testImplementation 'junit:junit:4.13.2'
 	testImplementation 'org.json:json:20231013'

app/src/debug/kotlin/org/koitharu/kotatsu/KotatsuApp.kt

@@ -36,7 +36,7 @@ class KotatsuApp : BaseApp() {
 		FragmentStrictMode.defaultPolicy = FragmentStrictMode.Policy.Builder()
 			.penaltyDeath()
 			.detectFragmentReuse()
-			// .detectWrongFragmentContainer() FIXME: migrate to ViewPager2
+			.detectWrongFragmentContainer()
 			.detectRetainInstanceUsage()
 			.detectSetUserVisibleHint()
 			.detectFragmentTagUsage()

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

@@ -13,7 +13,6 @@ import org.koitharu.kotatsu.list.ui.adapter.emptyStateListAD
 import org.koitharu.kotatsu.list.ui.adapter.listHeaderAD
 import org.koitharu.kotatsu.list.ui.adapter.loadingFooterAD
 import org.koitharu.kotatsu.list.ui.adapter.loadingStateAD
-import org.koitharu.kotatsu.list.ui.model.ListHeader
 import org.koitharu.kotatsu.list.ui.model.ListModel
 
 class BookmarksAdapter(
@@ -32,13 +31,6 @@ class BookmarksAdapter(
 	}
 
 	override fun getSectionText(context: Context, position: Int): CharSequence? {
-		val list = items
-		for (i in (0..position).reversed()) {
-			val item = list.getOrNull(i) ?: continue
-			if (item is ListHeader) {
-				return item.getText(context)
-			}
-		}
-		return null
+		return findHeader(position)?.getText(context)
 	}
 }

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

@@ -0,0 +1,24 @@
+package org.koitharu.kotatsu.core
+
+import android.content.Context
+import com.google.auto.service.AutoService
+import org.acra.builder.ReportBuilder
+import org.acra.config.CoreConfiguration
+import org.acra.config.ReportingAdministrator
+
+@AutoService(ReportingAdministrator::class)
+class ErrorReportingAdmin : ReportingAdministrator {
+
+	override fun shouldStartCollecting(
+		context: Context,
+		config: CoreConfiguration,
+		reportBuilder: ReportBuilder
+	): Boolean {
+		return reportBuilder.exception?.isDeadOs() != true
+	}
+
+	private fun Throwable.isDeadOs(): Boolean {
+		val className = javaClass.simpleName
+		return className == "DeadSystemException" || className == "DeadSystemRuntimeException" || cause?.isDeadOs() == true
+	}
+}

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

@@ -13,6 +13,8 @@ import org.koitharu.kotatsu.parsers.model.MangaChapter
 import org.koitharu.kotatsu.parsers.model.MangaSource
 import org.koitharu.kotatsu.parsers.model.MangaState
 import org.koitharu.kotatsu.parsers.util.mapToSet
+import java.text.DecimalFormat
+import java.text.DecimalFormatSymbols
 import com.google.android.material.R as materialR
 
 @JvmName("mangaIds")
@@ -113,3 +115,16 @@ val Manga.appUrl: Uri
 		.appendQueryParameter("name", title)
 		.appendQueryParameter("url", url)
 		.build()
+
+private val chaptersNumberFormat = DecimalFormat("#.#").also { f ->
+	f.decimalFormatSymbols = DecimalFormatSymbols.getInstance().also {
+		it.decimalSeparator = '.'
+	}
+}
+
+fun MangaChapter.formatNumber(): String? {
+	if (number <= 0f) {
+		return null
+	}
+	return chaptersNumberFormat.format(number.toDouble())
+}

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

@@ -19,7 +19,8 @@ data class ParcelableChapter(
 			MangaChapter(
 				id = parcel.readLong(),
 				name = parcel.readString().orEmpty(),
-				number = parcel.readInt(),
+				number = parcel.readFloat(),
+				volume = parcel.readInt(),
 				url = parcel.readString().orEmpty(),
 				scanlator = parcel.readString(),
 				uploadDate = parcel.readLong(),
@@ -31,7 +32,8 @@ data class ParcelableChapter(
 		override fun ParcelableChapter.write(parcel: Parcel, flags: Int) = with(chapter) {
 			parcel.writeLong(id)
 			parcel.writeString(name)
-			parcel.writeInt(number)
+			parcel.writeFloat(number)
+			parcel.writeInt(volume)
 			parcel.writeString(url)
 			parcel.writeString(scanlator)
 			parcel.writeLong(uploadDate)

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

@@ -1,16 +1,9 @@
 package org.koitharu.kotatsu.core.os
 
-import android.annotation.SuppressLint
 import android.content.Context
 import android.content.pm.PackageManager
+import androidx.core.content.pm.PackageInfoCompat
 import dagger.hilt.android.qualifiers.ApplicationContext
-import org.koitharu.kotatsu.core.util.ext.printStackTraceDebug
-import org.koitharu.kotatsu.parsers.util.byte2HexFormatted
-import java.io.ByteArrayInputStream
-import java.io.InputStream
-import java.security.MessageDigest
-import java.security.cert.CertificateFactory
-import java.security.cert.X509Certificate
 import javax.inject.Inject
 import javax.inject.Singleton
 
@@ -18,29 +11,13 @@ import javax.inject.Singleton
 class AppValidator @Inject constructor(
 	@ApplicationContext private val context: Context,
 ) {
-
+	@Suppress("NewApi")
 	val isOriginalApp by lazy {
-		getCertificateSHA1Fingerprint() == CERT_SHA1
+		val certificates = mapOf(CERT_SHA256.toByteArray() to PackageManager.CERT_INPUT_SHA256)
+		PackageInfoCompat.hasSignatures(context.packageManager, context.packageName, certificates, false)
 	}
 
-	@Suppress("DEPRECATION")
-	@SuppressLint("PackageManagerGetSignatures")
-	private fun getCertificateSHA1Fingerprint(): String? = runCatching {
-		val packageInfo = context.packageManager.getPackageInfo(context.packageName, PackageManager.GET_SIGNATURES)
-		val signatures = requireNotNull(packageInfo?.signatures)
-		val cert: ByteArray = signatures.first().toByteArray()
-		val input: InputStream = ByteArrayInputStream(cert)
-		val cf = CertificateFactory.getInstance("X509")
-		val c = cf.generateCertificate(input) as X509Certificate
-		val md: MessageDigest = MessageDigest.getInstance("SHA1")
-		val publicKey: ByteArray = md.digest(c.encoded)
-		return publicKey.byte2HexFormatted()
-	}.onFailure { error ->
-		error.printStackTraceDebug()
-	}.getOrNull()
-
 	private companion object {
-
-		private const val CERT_SHA1 = "2C:19:C7:E8:07:61:2B:8E:94:51:1B:FD:72:67:07:64:5D:C2:58:AE"
+		private const val CERT_SHA256 = "67e15100bb809301783edcb6348fa3bbf83034d91e62868a91053dbd70db3f18"
 	}
 }

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

@@ -347,9 +347,13 @@ class AppSettings @Inject constructor(@ApplicationContext context: Context) {
 		set(value) = prefs.edit { putEnumValue(KEY_LOCAL_LIST_ORDER, value) }
 
 	var historySortOrder: ListSortOrder
-		get() = prefs.getEnumValue(KEY_HISTORY_ORDER, ListSortOrder.UPDATED)
+		get() = prefs.getEnumValue(KEY_HISTORY_ORDER, ListSortOrder.LAST_READ)
 		set(value) = prefs.edit { putEnumValue(KEY_HISTORY_ORDER, value) }
 
+	var allFavoritesSortOrder: ListSortOrder
+		get() = prefs.getEnumValue(KEY_FAVORITES_ORDER, ListSortOrder.NEWEST)
+		set(value) = prefs.edit { putEnumValue(KEY_FAVORITES_ORDER, value) }
+
 	val isRelatedMangaEnabled: Boolean
 		get() = prefs.getBoolean(KEY_RELATED_MANGA, true)
 
@@ -530,6 +534,7 @@ class AppSettings @Inject constructor(@ApplicationContext context: Context) {
 		const val KEY_READER_OPTIMIZE = "reader_optimize"
 		const val KEY_LOCAL_LIST_ORDER = "local_order"
 		const val KEY_HISTORY_ORDER = "history_order"
+		const val KEY_FAVORITES_ORDER = "fav_order"
 		const val KEY_WEBTOON_ZOOM = "webtoon_zoom"
 		const val KEY_PREFETCH_CONTENT = "prefetch_content"
 		const val KEY_APP_LOCALE = "app_locale"

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

@@ -4,7 +4,9 @@ enum class ReaderMode(val id: Int) {
 
 	STANDARD(1),
 	REVERSED(3),
-	WEBTOON(2);
+	VERTICAL(4),
+	WEBTOON(2),
+	;
 
 	companion object {
 

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

@@ -10,6 +10,7 @@ import kotlinx.coroutines.flow.FlowCollector
 import org.koitharu.kotatsu.core.util.ContinuationResumeRunnable
 import org.koitharu.kotatsu.list.ui.ListModelDiffCallback
 import org.koitharu.kotatsu.list.ui.adapter.ListItemType
+import org.koitharu.kotatsu.list.ui.model.ListHeader
 import org.koitharu.kotatsu.list.ui.model.ListModel
 import kotlin.coroutines.suspendCoroutine
 
@@ -35,4 +36,15 @@ open class BaseListAdapter<T : ListModel> : AsyncListDifferDelegationAdapter<T>(
 	fun removeListListener(listListener: ListListener<T>) {
 		differ.removeListListener(listListener)
 	}
+
+	fun findHeader(position: Int): ListHeader? {
+		val snapshot = items
+		for (i in (0..position).reversed()) {
+			val item = snapshot.getOrNull(i) ?: continue
+			if (item is ListHeader) {
+				return item
+			}
+		}
+		return null
+	}
 }

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

@@ -4,8 +4,10 @@ import android.content.Context
 import android.util.AttributeSet
 import android.view.ViewGroup
 import androidx.annotation.AttrRes
+import androidx.core.view.ancestors
 import androidx.core.view.isVisible
 import androidx.recyclerview.widget.RecyclerView
+import androidx.viewpager2.widget.ViewPager2
 import org.koitharu.kotatsu.R
 
 class FastScrollRecyclerView @JvmOverloads constructor(
@@ -15,6 +17,16 @@ class FastScrollRecyclerView @JvmOverloads constructor(
 ) : RecyclerView(context, attrs, defStyleAttr) {
 
 	val fastScroller = FastScroller(context, attrs)
+	var isVP2BugWorkaroundEnabled = false
+		set(value) {
+			field = value
+			if (value && isAttachedToWindow) {
+				checkIfInVP2()
+			} else if (!value) {
+				applyVP2Workaround = false
+			}
+		}
+	private var applyVP2Workaround = false
 
 	var isFastScrollerEnabled: Boolean = true
 		set(value) {
@@ -43,10 +55,29 @@ class FastScrollRecyclerView @JvmOverloads constructor(
 	override fun onAttachedToWindow() {
 		super.onAttachedToWindow()
 		fastScroller.attachRecyclerView(this)
+		if (isVP2BugWorkaroundEnabled) {
+			checkIfInVP2()
+		}
 	}
 
 	override fun onDetachedFromWindow() {
 		fastScroller.detachRecyclerView()
 		super.onDetachedFromWindow()
+		applyVP2Workaround = false
+	}
+
+	override fun isLayoutRequested(): Boolean {
+		return if (applyVP2Workaround) false else super.isLayoutRequested()
+	}
+
+	override fun requestLayout() {
+		super.requestLayout()
+		if (applyVP2Workaround && parent?.isLayoutRequested == true) {
+			parent?.requestLayout()
+		}
+	}
+
+	private fun checkIfInVP2() {
+		applyVP2Workaround = ancestors.any { it is ViewPager2 } == true
 	}
 }

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

@@ -0,0 +1,38 @@
+package org.koitharu.kotatsu.core.ui.util
+
+import android.view.MenuItem
+import android.view.View
+import androidx.appcompat.widget.PopupMenu
+import androidx.core.view.MenuProvider
+import org.koitharu.kotatsu.core.util.ext.setOnContextClickListenerCompat
+
+class PopupMenuMediator(
+	private val provider: MenuProvider,
+) : View.OnLongClickListener, PopupMenu.OnMenuItemClickListener, PopupMenu.OnDismissListener {
+
+	override fun onLongClick(v: View): Boolean {
+		val menu = PopupMenu(v.context, v)
+		provider.onCreateMenu(menu.menu, menu.menuInflater)
+		provider.onPrepareMenu(menu.menu)
+		if (!menu.menu.hasVisibleItems()) {
+			return false
+		}
+		menu.setOnMenuItemClickListener(this)
+		menu.setOnDismissListener(this)
+		menu.show()
+		return true
+	}
+
+	override fun onMenuItemClick(item: MenuItem): Boolean {
+		return provider.onMenuItemSelected(item)
+	}
+
+	override fun onDismiss(menu: PopupMenu) {
+		provider.onMenuClosed(menu.menu)
+	}
+
+	fun attach(view: View) {
+		view.setOnLongClickListener(this)
+		view.setOnContextClickListenerCompat(this)
+	}
+}

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

@@ -8,9 +8,11 @@ import androidx.annotation.AttrRes
 import androidx.annotation.ColorInt
 import androidx.annotation.FloatRange
 import androidx.annotation.Px
+import androidx.annotation.StyleRes
 import androidx.core.content.ContextCompat
 import androidx.core.content.res.use
 import androidx.core.graphics.ColorUtils
+import com.google.android.material.R as materialR
 
 fun Context.getThemeDrawable(
 	@AttrRes resId: Int,
@@ -75,3 +77,7 @@ fun TypedArray.getDrawableCompat(context: Context, index: Int): Drawable? {
 	val resId = getResourceId(index, 0)
 	return if (resId != 0) ContextCompat.getDrawable(context, resId) else null
 }
+
+@get:StyleRes
+val DIALOG_THEME_CENTERED: Int
+	inline get() = materialR.style.ThemeOverlay_Material3_MaterialAlertDialog_Centered

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

@@ -15,7 +15,9 @@ import androidx.core.view.descendants
 import androidx.core.view.isVisible
 import androidx.recyclerview.widget.RecyclerView
 import androidx.recyclerview.widget.RecyclerView.ViewHolder
+import androidx.swiperefreshlayout.widget.CircularProgressDrawable
 import androidx.viewpager2.widget.ViewPager2
+import com.google.android.material.button.MaterialButton
 import com.google.android.material.progressindicator.BaseProgressIndicator
 import com.google.android.material.slider.Slider
 import com.google.android.material.tabs.TabLayout
@@ -161,3 +163,12 @@ val Toolbar.menuView: ActionMenuView?
 		menu // to call ensureMenu()
 		return children.firstNotNullOfOrNull { it as? ActionMenuView }
 	}
+
+fun MaterialButton.setProgressIcon() {
+	val progressDrawable = CircularProgressDrawable(context)
+	progressDrawable.strokeWidth = resources.resolveDp(2f)
+	progressDrawable.setColorSchemeColors(currentTextColor)
+	progressDrawable.setTintList(textColors)
+	icon = progressDrawable
+	progressDrawable.start()
+}

app/src/main/kotlin/org/koitharu/kotatsu/details/data/ReadingTime.kt

@@ -0,0 +1,21 @@
+package org.koitharu.kotatsu.details.data
+
+import android.content.res.Resources
+import org.koitharu.kotatsu.R
+
+data class ReadingTime(
+	val minutes: Int,
+	val hours: Int,
+	val isContinue: Boolean,
+) {
+
+	fun format(resources: Resources): String = when {
+		hours == 0 -> resources.getQuantityString(R.plurals.minutes, minutes, minutes)
+		minutes == 0 -> resources.getQuantityString(R.plurals.hours, hours, hours)
+		else -> resources.getString(
+			R.string.remaining_time_pattern,
+			resources.getQuantityString(R.plurals.hours, hours, hours),
+			resources.getQuantityString(R.plurals.minutes, minutes, minutes),
+		)
+	}
+}

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

@@ -0,0 +1,33 @@
+package org.koitharu.kotatsu.details.domain
+
+import org.koitharu.kotatsu.core.model.MangaHistory
+import org.koitharu.kotatsu.core.model.findById
+import org.koitharu.kotatsu.details.data.MangaDetails
+import org.koitharu.kotatsu.details.data.ReadingTime
+import javax.inject.Inject
+import kotlin.math.roundToInt
+
+class ReadingTimeUseCase @Inject constructor() {
+
+	fun invoke(manga: MangaDetails?, branch: String?, history: MangaHistory?): ReadingTime? {
+		// FIXME MAXIMUM HARDCODE!!! To do calculation with user's page read speed and his favourites/history mangas average pages in chapter
+		val chapters = manga?.chapters?.get(branch)
+		if (chapters.isNullOrEmpty()) {
+			return null
+		}
+		val isOnHistoryBranch = history != null && chapters.findById(history.chapterId) != null
+		// Impossible task, I guess. Good luck on this.
+		var averageTimeSec: Int = 20 * 10 * chapters.size // 20 pages, 10 seconds per page
+		if (isOnHistoryBranch) {
+			averageTimeSec = (averageTimeSec * (1f - checkNotNull(history).percent)).roundToInt()
+		}
+		if (averageTimeSec < 60) {
+			return null
+		}
+		return ReadingTime(
+			minutes = (averageTimeSec / 60) % 60,
+			hours = averageTimeSec / 3600,
+			isContinue = isOnHistoryBranch,
+		)
+	}
+}

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

@@ -8,12 +8,15 @@ import androidx.activity.OnBackPressedCallback
 import androidx.appcompat.view.ActionMode
 import androidx.viewpager2.widget.ViewPager2
 import com.google.android.material.bottomsheet.BottomSheetBehavior
+import com.google.android.material.tabs.TabLayout
 import org.koitharu.kotatsu.core.ui.util.ActionModeListener
 import org.koitharu.kotatsu.core.util.ext.doOnExpansionsChanged
+import org.koitharu.kotatsu.core.util.ext.setTabsEnabled
 
 class ChaptersBottomSheetMediator(
 	private val behavior: BottomSheetBehavior<*>,
 	private val pager: ViewPager2,
+	private val tabLayout: TabLayout,
 ) : OnBackPressedCallback(false),
 	ActionModeListener,
 	OnLayoutChangeListener, View.OnGenericMotionListener {
@@ -75,8 +78,7 @@ class ChaptersBottomSheetMediator(
 
 	fun lock() {
 		lockCounter++
-		behavior.isDraggable = lockCounter <= 0
-		pager.isUserInputEnabled = lockCounter <= 0
+		updateLock()
 	}
 
 	fun unlock() {
@@ -84,7 +86,12 @@ class ChaptersBottomSheetMediator(
 		if (lockCounter < 0) {
 			lockCounter = 0
 		}
+		updateLock()
+	}
+
+	private fun updateLock() {
 		behavior.isDraggable = lockCounter <= 0
 		pager.isUserInputEnabled = lockCounter <= 0
+		tabLayout.setTabsEnabled(lockCounter <= 0)
 	}
 }

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

@@ -1,10 +1,14 @@
 package org.koitharu.kotatsu.details.ui
 
+import android.content.Context
+import org.koitharu.kotatsu.R
 import org.koitharu.kotatsu.bookmarks.domain.Bookmark
 import org.koitharu.kotatsu.core.model.MangaHistory
 import org.koitharu.kotatsu.details.data.MangaDetails
 import org.koitharu.kotatsu.details.ui.model.ChapterListItem
 import org.koitharu.kotatsu.details.ui.model.toListItem
+import org.koitharu.kotatsu.list.ui.model.ListHeader
+import org.koitharu.kotatsu.list.ui.model.ListModel
 import org.koitharu.kotatsu.parsers.util.mapToSet
 
 fun MangaDetails.mapChapters(
@@ -61,3 +65,22 @@ fun MangaDetails.mapChapters(
 	}
 	return result
 }
+
+fun List<ChapterListItem>.withVolumeHeaders(context: Context): List<ListModel> {
+	var prevVolume = 0
+	val result = ArrayList<ListModel>((size * 1.4).toInt())
+	for (item in this) {
+		val chapter = item.chapter
+		if (chapter.volume != prevVolume) {
+			val text = if (chapter.volume == 0) {
+				context.getString(R.string.volume_unknown)
+			} else {
+				context.getString(R.string.volume_, chapter.volume)
+			}
+			result.add(ListHeader(text))
+			prevVolume = chapter.volume
+		}
+		result.add(item)
+	}
+	return result
+}

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

@@ -4,7 +4,9 @@ import android.content.Context
 import android.content.Intent
 import android.graphics.Color
 import android.os.Bundle
+import android.text.style.DynamicDrawableSpan
 import android.text.style.ForegroundColorSpan
+import android.text.style.ImageSpan
 import android.text.style.RelativeSizeSpan
 import android.transition.AutoTransition
 import android.transition.Slide
@@ -107,7 +109,7 @@ class DetailsActivity :
 
 		if (viewBinding.layoutBottom != null) {
 			val behavior = BottomSheetBehavior.from(checkNotNull(viewBinding.layoutBottom))
-			val bsMediator = ChaptersBottomSheetMediator(behavior, viewBinding.pager)
+			val bsMediator = ChaptersBottomSheetMediator(behavior, viewBinding.pager, viewBinding.tabs)
 			actionModeDelegate.addListener(bsMediator)
 			checkNotNull(viewBinding.layoutBsHeader).addOnLayoutChangeListener(bsMediator)
 			onBackPressedDispatcher.addCallback(bsMediator)
@@ -318,6 +320,18 @@ class DetailsActivity :
 		val branches = viewModel.branches.value
 		for ((i, branch) in branches.withIndex()) {
 			val title = buildSpannedString {
+				if (branch.isCurrent) {
+					inSpans(
+						ImageSpan(
+							this@DetailsActivity,
+							R.drawable.ic_current_chapter,
+							DynamicDrawableSpan.ALIGN_BASELINE,
+						),
+					) {
+						append(' ')
+					}
+					append(' ')
+				}
 				append(branch.name ?: getString(R.string.system_default))
 				append(' ')
 				append(' ')
@@ -363,8 +377,9 @@ class DetailsActivity :
 	}
 
 	private fun initPager() {
-		viewBinding.pager.recyclerView?.isNestedScrollingEnabled = false
 		val adapter = DetailsPagerAdapter(this)
+		viewBinding.pager.recyclerView?.isNestedScrollingEnabled = false
+		viewBinding.pager.offscreenPageLimit = 1
 		viewBinding.pager.adapter = adapter
 		TabLayoutMediator(viewBinding.tabs, viewBinding.pager, adapter).attach()
 		viewBinding.pager.setCurrentItem(settings.defaultDetailsTab, false)

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

@@ -48,6 +48,7 @@ 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.data.ReadingTime
 import org.koitharu.kotatsu.details.ui.model.ChapterListItem
 import org.koitharu.kotatsu.details.ui.model.HistoryInfo
 import org.koitharu.kotatsu.details.ui.related.RelatedMangaActivity
@@ -70,6 +71,8 @@ import org.koitharu.kotatsu.scrobbling.common.domain.model.ScrobblingInfo
 import org.koitharu.kotatsu.scrobbling.common.ui.selector.ScrobblingSelectorSheet
 import org.koitharu.kotatsu.search.ui.MangaListActivity
 import org.koitharu.kotatsu.search.ui.SearchActivity
+import java.text.SimpleDateFormat
+import java.util.Date
 import javax.inject.Inject
 
 @AndroidEntryPoint
@@ -118,6 +121,7 @@ class DetailsFragment :
 		viewModel.localSize.observe(viewLifecycleOwner, ::onLocalSizeChanged)
 		viewModel.relatedManga.observe(viewLifecycleOwner, ::onRelatedMangaChanged)
 		viewModel.chapters.observe(viewLifecycleOwner, ::onChaptersChanged)
+		viewModel.readingTime.observe(viewLifecycleOwner, ::onReadingTimeChanged)
 	}
 
 	override fun onItemClick(item: Bookmark, view: View) {
@@ -211,6 +215,19 @@ class DetailsFragment :
 		}
 	}
 
+	private fun onReadingTimeChanged(time: ReadingTime?) {
+		val binding = viewBinding ?: return
+		if (time == null) {
+			binding.approximateReadTimeLayout.isVisible = false
+			return
+		}
+		binding.approximateReadTime.text = time.format(resources)
+		binding.approximateReadTimeTitle.setText(
+			if (time.isContinue) R.string.approximate_remaining_time else R.string.approximate_reading_time
+		)
+		binding.approximateReadTimeLayout.isVisible = true
+	}
+
 	private fun onDescriptionChanged(description: CharSequence?) {
 		val tv = requireViewBinding().textViewDescription
 		if (description.isNullOrBlank()) {

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

@@ -25,6 +25,7 @@ import okio.FileNotFoundException
 import org.koitharu.kotatsu.R
 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.model.getPreferredBranch
 import org.koitharu.kotatsu.core.parser.MangaIntent
 import org.koitharu.kotatsu.core.prefs.AppSettings
@@ -42,6 +43,7 @@ import org.koitharu.kotatsu.details.domain.BranchComparator
 import org.koitharu.kotatsu.details.domain.DetailsInteractor
 import org.koitharu.kotatsu.details.domain.DetailsLoadUseCase
 import org.koitharu.kotatsu.details.domain.ProgressUpdateUseCase
+import org.koitharu.kotatsu.details.domain.ReadingTimeUseCase
 import org.koitharu.kotatsu.details.domain.RelatedMangaUseCase
 import org.koitharu.kotatsu.details.ui.model.ChapterListItem
 import org.koitharu.kotatsu.details.ui.model.HistoryInfo
@@ -76,6 +78,7 @@ class DetailsViewModel @Inject constructor(
 	private val extraProvider: ListExtraProvider,
 	private val detailsLoadUseCase: DetailsLoadUseCase,
 	private val progressUpdateUseCase: ProgressUpdateUseCase,
+	private val readingTimeUseCase: ReadingTimeUseCase,
 ) : BaseViewModel() {
 
 	private val intent = MangaIntent(savedStateHandle)
@@ -169,10 +172,21 @@ class DetailsViewModel @Inject constructor(
 	val branches: StateFlow<List<MangaBranch>> = combine(
 		details,
 		selectedBranch,
-	) { m, b ->
-		(m?.chapters ?: return@combine emptyList())
-			.map { x -> MangaBranch(x.key, x.value.size, x.key == b) }
-			.sortedWith(BranchComparator())
+		history,
+	) { m, b, h ->
+		val c = m?.chapters
+		if (c.isNullOrEmpty()) {
+			return@combine emptyList()
+		}
+		val currentBranch = h?.let { m.allChapters.findById(it.chapterId) }?.branch
+		c.map { x ->
+			MangaBranch(
+				name = x.key,
+				count = x.value.size,
+				isSelected = x.key == b,
+				isCurrent = h != null && x.key == currentBranch,
+			)
+		}.sortedWith(BranchComparator())
 	}.stateIn(viewModelScope + Dispatchers.Default, SharingStarted.Eagerly, emptyList())
 
 	val isChaptersEmpty: StateFlow<Boolean> = details.map {
@@ -200,6 +214,14 @@ class DetailsViewModel @Inject constructor(
 		(if (reversed) list.asReversed() else list).filterSearch(query)
 	}.stateIn(viewModelScope, SharingStarted.Eagerly, emptyList())
 
+	val readingTime = combine(
+		details,
+		selectedBranch,
+		history,
+	) { m, b, h ->
+		readingTimeUseCase.invoke(m, b, h)
+	}.stateIn(viewModelScope, SharingStarted.Lazily, null)
+
 	val selectedBranchValue: String?
 		get() = selectedBranch.value
 

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

@@ -1,5 +1,6 @@
 package org.koitharu.kotatsu.details.ui.adapter
 
+import android.graphics.Typeface
 import androidx.core.content.ContextCompat
 import androidx.core.view.isVisible
 import com.hannesdorfmann.adapterdelegates4.dsl.adapterDelegateViewBinding
@@ -7,15 +8,15 @@ import org.koitharu.kotatsu.R
 import org.koitharu.kotatsu.core.ui.list.AdapterDelegateClickListenerAdapter
 import org.koitharu.kotatsu.core.ui.list.OnListItemClickListener
 import org.koitharu.kotatsu.core.util.ext.drawableStart
-import org.koitharu.kotatsu.core.util.ext.getThemeColor
+import org.koitharu.kotatsu.core.util.ext.getThemeColorStateList
 import org.koitharu.kotatsu.core.util.ext.textAndVisible
 import org.koitharu.kotatsu.databinding.ItemChapterBinding
 import org.koitharu.kotatsu.details.ui.model.ChapterListItem
-import com.google.android.material.R as materialR
+import org.koitharu.kotatsu.list.ui.model.ListModel
 
 fun chapterListItemAD(
 	clickListener: OnListItemClickListener<ChapterListItem>,
-) = adapterDelegateViewBinding<ChapterListItem, ChapterListItem, ItemChapterBinding>(
+) = adapterDelegateViewBinding<ChapterListItem, ListModel, ItemChapterBinding>(
 	{ inflater, parent -> ItemChapterBinding.inflate(inflater, parent, false) },
 ) {
 
@@ -26,31 +27,38 @@ fun chapterListItemAD(
 	bind { payloads ->
 		if (payloads.isEmpty()) {
 			binding.textViewTitle.text = item.chapter.name
-			binding.textViewNumber.text = item.chapter.number.toString()
-			binding.textViewDescription.textAndVisible = item.description()
+			binding.textViewDescription.textAndVisible = item.description
 		}
 		when {
 			item.isCurrent -> {
-				binding.textViewNumber.setBackgroundResource(R.drawable.bg_badge_primary)
-				binding.textViewNumber.setTextColor(context.getThemeColor(materialR.attr.colorOnPrimary))
+				binding.textViewTitle.drawableStart = ContextCompat.getDrawable(context, R.drawable.ic_current_chapter)
+				binding.textViewTitle.setTextColor(context.getThemeColorStateList(android.R.attr.textColorPrimary))
+				binding.textViewDescription.setTextColor(context.getThemeColorStateList(android.R.attr.textColorPrimary))
+				binding.textViewTitle.typeface = Typeface.DEFAULT_BOLD
+				binding.textViewDescription.typeface = Typeface.DEFAULT_BOLD
 			}
 
 			item.isUnread -> {
-				binding.textViewNumber.setBackgroundResource(R.drawable.bg_badge_default)
-				binding.textViewNumber.setTextColor(context.getThemeColor(materialR.attr.colorOnTertiary))
+				binding.textViewTitle.drawableStart = if (item.isNew) {
+					ContextCompat.getDrawable(context, R.drawable.ic_new)
+				} else {
+					null
+				}
+				binding.textViewTitle.setTextColor(context.getThemeColorStateList(android.R.attr.textColorPrimary))
+				binding.textViewDescription.setTextColor(context.getThemeColorStateList(android.R.attr.textColorPrimary))
+				binding.textViewTitle.typeface = Typeface.DEFAULT
+				binding.textViewDescription.typeface = Typeface.DEFAULT
 			}
 
 			else -> {
-				binding.textViewNumber.setBackgroundResource(R.drawable.bg_badge_outline)
-				binding.textViewNumber.setTextColor(context.getThemeColor(android.R.attr.textColorTertiary))
+				binding.textViewTitle.drawableStart = null
+				binding.textViewTitle.setTextColor(context.getThemeColorStateList(android.R.attr.textColorHint))
+				binding.textViewDescription.setTextColor(context.getThemeColorStateList(android.R.attr.textColorHint))
+				binding.textViewTitle.typeface = Typeface.DEFAULT
+				binding.textViewDescription.typeface = Typeface.DEFAULT
 			}
 		}
 		binding.imageViewBookmarked.isVisible = item.isBookmarked
 		binding.imageViewDownloaded.isVisible = item.isDownloaded
-		binding.textViewTitle.drawableStart = if (item.isNew) {
-			ContextCompat.getDrawable(context, R.drawable.ic_new)
-		} else {
-			null
-		}
 	}
 }

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

@@ -5,22 +5,20 @@ import org.koitharu.kotatsu.core.ui.BaseListAdapter
 import org.koitharu.kotatsu.core.ui.list.OnListItemClickListener
 import org.koitharu.kotatsu.core.ui.list.fastscroll.FastScroller
 import org.koitharu.kotatsu.details.ui.model.ChapterListItem
+import org.koitharu.kotatsu.list.ui.adapter.ListItemType
+import org.koitharu.kotatsu.list.ui.adapter.listHeaderAD
+import org.koitharu.kotatsu.list.ui.model.ListModel
 
 class ChaptersAdapter(
 	onItemClickListener: OnListItemClickListener<ChapterListItem>,
-) : BaseListAdapter<ChapterListItem>(), FastScroller.SectionIndexer {
+) : BaseListAdapter<ListModel>(), FastScroller.SectionIndexer {
 
 	init {
-		setHasStableIds(true)
-		delegatesManager.addDelegate(chapterListItemAD(onItemClickListener))
-	}
-
-	override fun getItemId(position: Int): Long {
-		return items[position].chapter.id
+		addDelegate(ListItemType.CHAPTER, chapterListItemAD(onItemClickListener))
+		addDelegate(ListItemType.HEADER, listHeaderAD(null))
 	}
 
 	override fun getSectionText(context: Context, position: Int): CharSequence? {
-		val item = items.getOrNull(position) ?: return null
-		return item.chapter.number.toString()
+		return findHeader(position)?.getText(context)
 	}
 }

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

@@ -1,6 +1,8 @@
 package org.koitharu.kotatsu.details.ui.model
 
 import android.text.format.DateUtils
+import org.jsoup.internal.StringUtil.StringJoiner
+import org.koitharu.kotatsu.core.model.formatNumber
 import org.koitharu.kotatsu.list.ui.model.ListModel
 import org.koitharu.kotatsu.parsers.model.MangaChapter
 
@@ -10,6 +12,14 @@ data class ChapterListItem(
 	private val uploadDateMs: Long,
 ) : ListModel {
 
+	var description: String? = null
+		private set
+		get() {
+			if (field != null) return field
+			field = buildDescription()
+			return field
+		}
+
 	var uploadDate: CharSequence? = null
 		private set
 		get() {
@@ -38,13 +48,20 @@ data class ChapterListItem(
 	val isNew: Boolean
 		get() = hasFlag(FLAG_NEW)
 
-	fun description(): CharSequence? {
-		val scanlator = chapter.scanlator?.takeUnless { it.isBlank() }
-		return when {
-			uploadDate != null && scanlator != null -> "$uploadDate • $scanlator"
-			scanlator != null -> scanlator
-			else -> uploadDate
+	private fun buildDescription(): String {
+		val joiner = StringJoiner(" • ")
+		chapter.formatNumber()?.let {
+			joiner.add("#").append(it)
 		}
+		uploadDate?.let { date ->
+			joiner.add(date.toString())
+		}
+		chapter.scanlator?.let { scanlator ->
+			if (scanlator.isNotBlank()) {
+				joiner.add(scanlator)
+			}
+		}
+		return joiner.complete()
 	}
 
 	private fun hasFlag(flag: Int): Boolean {

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

@@ -7,6 +7,7 @@ data class MangaBranch(
 	val name: String?,
 	val count: Int,
 	val isSelected: Boolean,
+	val isCurrent: Boolean,
 ) : ListModel {
 
 	override fun areItemsTheSame(other: ListModel): Boolean {

app/src/main/kotlin/org/koitharu/kotatsu/details/ui/pager/chapters/ChaptersFragment.kt

@@ -12,6 +12,9 @@ import androidx.core.view.isVisible
 import androidx.fragment.app.activityViewModels
 import androidx.lifecycle.Lifecycle
 import com.google.android.material.snackbar.Snackbar
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.flow.flowOn
+import kotlinx.coroutines.flow.map
 import org.koitharu.kotatsu.R
 import org.koitharu.kotatsu.core.ui.BaseFragment
 import org.koitharu.kotatsu.core.ui.list.ListSelectionController
@@ -26,6 +29,9 @@ import org.koitharu.kotatsu.details.ui.DetailsViewModel
 import org.koitharu.kotatsu.details.ui.adapter.ChaptersAdapter
 import org.koitharu.kotatsu.details.ui.adapter.ChaptersSelectionDecoration
 import org.koitharu.kotatsu.details.ui.model.ChapterListItem
+import org.koitharu.kotatsu.details.ui.withVolumeHeaders
+import org.koitharu.kotatsu.list.ui.adapter.TypedListSpacingDecoration
+import org.koitharu.kotatsu.list.ui.model.ListModel
 import org.koitharu.kotatsu.local.ui.LocalChaptersRemoveService
 import org.koitharu.kotatsu.parsers.model.MangaSource
 import org.koitharu.kotatsu.reader.ui.ReaderActivity.IntentBuilder
@@ -57,12 +63,17 @@ class ChaptersFragment :
 			callback = this,
 		)
 		with(binding.recyclerViewChapters) {
+			addItemDecoration(TypedListSpacingDecoration(context, true))
 			checkNotNull(selectionController).attachToRecyclerView(this)
 			setHasFixedSize(true)
+			isNestedScrollingEnabled = false
 			adapter = chaptersAdapter
 		}
 		viewModel.isLoading.observe(viewLifecycleOwner, this::onLoadingStateChanged)
-		viewModel.chapters.observe(viewLifecycleOwner, this::onChaptersChanged)
+		viewModel.chapters
+			.map { it.withVolumeHeaders(requireContext()) }
+			.flowOn(Dispatchers.Default)
+			.observe(viewLifecycleOwner, this::onChaptersChanged)
 		viewModel.isChaptersEmpty.observe(viewLifecycleOwner) {
 			binding.textViewHolder.isVisible = it
 		}
@@ -83,6 +94,17 @@ class ChaptersFragment :
 		super.onDestroyView()
 	}
 
+	override fun onPause() {
+		// required for BottomSheetBehavior
+		requireViewBinding().recyclerViewChapters.isNestedScrollingEnabled = false
+		super.onPause()
+	}
+
+	override fun onResume() {
+		requireViewBinding().recyclerViewChapters.isNestedScrollingEnabled = true
+		super.onResume()
+	}
+
 	override fun onItemClick(item: ChapterListItem, view: View) {
 		if (selectionController?.onItemClick(item.chapter.id) == true) {
 			return
@@ -132,6 +154,9 @@ class ChaptersFragment :
 				val buffer = HashSet<Long>()
 				var isAdding = false
 				for (x in items) {
+					if (x !is ChapterListItem) {
+						continue
+					}
 					if (x.chapter.id in ids) {
 						isAdding = true
 						if (buffer.isNotEmpty()) {
@@ -147,7 +172,13 @@ class ChaptersFragment :
 			}
 
 			R.id.action_select_all -> {
-				val ids = chaptersAdapter?.items?.map { it.chapter.id } ?: return false
+				val ids = chaptersAdapter?.items?.mapNotNull {
+					if (it is ChapterListItem) {
+						it.chapter.id
+					} else {
+						null
+					}
+				} ?: return false
 				controller.addAll(ids)
 				true
 			}
@@ -171,7 +202,15 @@ class ChaptersFragment :
 	override fun onPrepareActionMode(controller: ListSelectionController, mode: ActionMode, menu: Menu): Boolean {
 		val selectedIds = selectionController?.peekCheckedIds() ?: return false
 		val allItems = chaptersAdapter?.items.orEmpty()
-		val items = allItems.withIndex().filter { (_, x) -> x.chapter.id in selectedIds }
+		val items = allItems.withIndex().mapNotNull<IndexedValue<ListModel>, IndexedValue<ChapterListItem>> { x ->
+			val value = x.value
+			@Suppress("UNCHECKED_CAST")
+			if (value is ChapterListItem && value.chapter.id in selectedIds) {
+				x as IndexedValue<ChapterListItem>
+			} else {
+				null
+			}
+		}
 		var canSave = true
 		var canDelete = true
 		items.forEach { (_, x) ->
@@ -200,10 +239,10 @@ class ChaptersFragment :
 
 	override fun onWindowInsetsChanged(insets: Insets) = Unit
 
-	private fun onChaptersChanged(list: List<ChapterListItem>) {
+	private fun onChaptersChanged(list: List<ListModel>) {
 		val adapter = chaptersAdapter ?: return
 		if (adapter.itemCount == 0) {
-			val position = list.indexOfFirst { it.isCurrent } - 1
+			val position = list.indexOfFirst { it is ChapterListItem && it.isCurrent } - 1
 			if (position > 0) {
 				val offset = (resources.getDimensionPixelSize(R.dimen.chapter_list_item_height) * 0.6).roundToInt()
 				adapter.setItems(

app/src/main/kotlin/org/koitharu/kotatsu/details/ui/pager/pages/PagesFragment.kt

@@ -88,6 +88,7 @@ class PagesFragment :
 			addItemDecoration(TypedListSpacingDecoration(context, false))
 			adapter = thumbnailsAdapter
 			setHasFixedSize(true)
+			isNestedScrollingEnabled = false
 			addOnLayoutChangeListener(spanResolver)
 			spanResolver?.setGridSize(settings.gridSize / 100f, this)
 			addOnScrollListener(ScrollListener().also { scrollListener = it })
@@ -112,6 +113,17 @@ class PagesFragment :
 		super.onDestroyView()
 	}
 
+	override fun onPause() {
+		// required for BottomSheetBehavior
+		requireViewBinding().recyclerView.isNestedScrollingEnabled = false
+		super.onPause()
+	}
+
+	override fun onResume() {
+		requireViewBinding().recyclerView.isNestedScrollingEnabled = true
+		super.onResume()
+	}
+
 	override fun onWindowInsetsChanged(insets: Insets) = Unit
 
 	override fun onItemClick(item: PageThumbnail, view: View) {

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

@@ -7,6 +7,7 @@ import android.view.MenuItem
 import androidx.core.view.MenuProvider
 import com.google.android.material.dialog.MaterialAlertDialogBuilder
 import org.koitharu.kotatsu.R
+import org.koitharu.kotatsu.core.util.ext.DIALOG_THEME_CENTERED
 import org.koitharu.kotatsu.settings.SettingsActivity
 
 class DownloadsMenuProvider(
@@ -41,10 +42,8 @@ class DownloadsMenuProvider(
 	}
 
 	private fun confirmCancelAll() {
-		MaterialAlertDialogBuilder(
-			context,
-			com.google.android.material.R.style.ThemeOverlay_Material3_MaterialAlertDialog_Centered,
-		).setTitle(R.string.cancel_all)
+		MaterialAlertDialogBuilder(context, DIALOG_THEME_CENTERED)
+			.setTitle(R.string.cancel_all)
 			.setMessage(R.string.cancel_all_downloads_confirm)
 			.setIcon(R.drawable.ic_cancel_multiple)
 			.setNegativeButton(android.R.string.cancel, null)
@@ -54,10 +53,8 @@ class DownloadsMenuProvider(
 	}
 
 	private fun confirmRemoveCompleted() {
-		MaterialAlertDialogBuilder(
-			context,
-			com.google.android.material.R.style.ThemeOverlay_Material3_MaterialAlertDialog_Centered,
-		).setTitle(R.string.remove_completed)
+		MaterialAlertDialogBuilder(context, DIALOG_THEME_CENTERED)
+			.setTitle(R.string.remove_completed)
 			.setMessage(R.string.remove_completed_downloads_confirm)
 			.setIcon(R.drawable.ic_clear_all)
 			.setNegativeButton(android.R.string.cancel, null)

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

@@ -21,6 +21,7 @@ import kotlinx.coroutines.plus
 import kotlinx.coroutines.sync.Mutex
 import kotlinx.coroutines.sync.withLock
 import org.koitharu.kotatsu.R
+import org.koitharu.kotatsu.core.model.formatNumber
 import org.koitharu.kotatsu.core.parser.MangaDataRepository
 import org.koitharu.kotatsu.core.parser.MangaRepository
 import org.koitharu.kotatsu.core.parser.RemoteMangaRepository
@@ -306,7 +307,7 @@ class DownloadsViewModel @Inject constructor(
 			return chapters.mapNotNullTo(ArrayList(size)) {
 				if (chapterIds == null || it.id in chapterIds) {
 					DownloadChapter(
-						number = it.number,
+						number = it.formatNumber(),
 						name = it.name,
 						isDownloaded = it.id in localChapters,
 					)

app/src/main/kotlin/org/koitharu/kotatsu/download/ui/list/chapters/DownloadChapter.kt

@@ -4,7 +4,7 @@ import org.koitharu.kotatsu.list.ui.ListModelDiffCallback
 import org.koitharu.kotatsu.list.ui.model.ListModel
 
 data class DownloadChapter(
-	val number: Int,
+	val number: String?,
 	val name: String,
 	val isDownloaded: Boolean,
 ) : ListModel {

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

@@ -1,9 +1,7 @@
 package org.koitharu.kotatsu.explore.ui.adapter
 
-import android.graphics.Color
 import android.view.View
 import androidx.lifecycle.LifecycleOwner
-import androidx.swiperefreshlayout.widget.CircularProgressDrawable
 import coil.ImageLoader
 import com.hannesdorfmann.adapterdelegates4.dsl.adapterDelegateViewBinding
 import org.koitharu.kotatsu.R
@@ -15,10 +13,9 @@ import org.koitharu.kotatsu.core.ui.image.TrimTransformation
 import org.koitharu.kotatsu.core.ui.list.AdapterDelegateClickListenerAdapter
 import org.koitharu.kotatsu.core.ui.list.OnListItemClickListener
 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.setProgressIcon
 import org.koitharu.kotatsu.core.util.ext.source
 import org.koitharu.kotatsu.core.util.ext.textAndVisible
 import org.koitharu.kotatsu.databinding.ItemExploreButtonsBinding
@@ -30,7 +27,6 @@ import org.koitharu.kotatsu.explore.ui.model.MangaSourceItem
 import org.koitharu.kotatsu.explore.ui.model.RecommendationsItem
 import org.koitharu.kotatsu.list.ui.model.ListModel
 import org.koitharu.kotatsu.parsers.model.Manga
-import com.google.android.material.R as materialR
 
 fun exploreButtonsAD(
 	clickListener: View.OnClickListener,
@@ -45,16 +41,7 @@ fun exploreButtonsAD(
 
 	bind {
 		if (item.isRandomLoading) {
-			val icon = CircularProgressDrawable(context)
-			icon.strokeWidth = context.resources.resolveDp(2f)
-			icon.setColorSchemeColors(
-				context.getThemeColor(
-					materialR.attr.colorPrimary,
-					Color.DKGRAY,
-				),
-			)
-			binding.buttonRandom.icon = icon
-			icon.start()
+			binding.buttonRandom.setProgressIcon()
 		} else {
 			binding.buttonRandom.setIconResource(R.drawable.ic_dice)
 		}

app/src/main/kotlin/org/koitharu/kotatsu/favourites/data/FavouritesDao.kt

@@ -95,6 +95,22 @@ abstract class FavouritesDao {
 		return findCoversImpl(query)
 	}
 
+	suspend fun findCovers(order: ListSortOrder, limit: Int): List<Cover> {
+		val orderBy = getOrderBy(order)
+
+		@Language("RoomSql")
+		val query = SimpleSQLiteQuery(
+			"SELECT manga.cover_url AS url, manga.source AS source FROM favourites " +
+				"LEFT JOIN manga ON favourites.manga_id = manga.manga_id " +
+				"WHERE deleted_at = 0 GROUP BY manga.manga_id ORDER BY $orderBy LIMIT ?",
+			arrayOf<Any>(limit),
+		)
+		return findCoversImpl(query)
+	}
+
+	@Query("SELECT COUNT(DISTINCT manga_id) FROM favourites WHERE deleted_at = 0")
+	abstract fun observeMangaCount(): Flow<Int>
+
 	@Query("SELECT * FROM manga WHERE manga_id IN (SELECT manga_id FROM favourites WHERE deleted_at = 0)")
 	abstract suspend fun findAllManga(): List<MangaEntity>
 
@@ -175,9 +191,10 @@ abstract class FavouritesDao {
 		ListSortOrder.RATING -> "manga.rating DESC"
 		ListSortOrder.NEWEST -> "favourites.created_at DESC"
 		ListSortOrder.ALPHABETIC -> "manga.title ASC"
-		ListSortOrder.NEW_CHAPTERS -> "(SELECT chapters_new FROM tracks WHERE tracks.manga_id = manga.manga_id) DESC"
-		ListSortOrder.UPDATED, // for legacy support
-		ListSortOrder.PROGRESS -> "(SELECT percent FROM history WHERE history.manga_id = manga.manga_id) DESC"
+		ListSortOrder.ALPHABETIC_REVERSE -> "manga.title DESC"
+		ListSortOrder.NEW_CHAPTERS -> "IFNULL((SELECT chapters_new FROM tracks WHERE tracks.manga_id = manga.manga_id), 0) DESC"
+		ListSortOrder.PROGRESS -> "IFNULL((SELECT percent FROM history WHERE history.manga_id = manga.manga_id), 0) DESC"
+		ListSortOrder.LAST_READ -> "IFNULL((SELECT updated_at FROM history WHERE history.manga_id = manga.manga_id), 0) DESC"
 
 		else -> throw IllegalArgumentException("Sort order $sortOrder is not supported")
 	}

app/src/main/kotlin/org/koitharu/kotatsu/favourites/domain/FavouritesRepository.kt

@@ -60,6 +60,11 @@ class FavouritesRepository @Inject constructor(
 			.flatMapLatest { order -> observeAll(categoryId, order) }
 	}
 
+	fun observeMangaCount(): Flow<Int> {
+		return db.getFavouritesDao().observeMangaCount()
+			.distinctUntilChanged()
+	}
+
 	fun observeCategories(): Flow<List<FavouriteCategory>> {
 		return db.getFavouriteCategoriesDao().observeAll().mapItems {
 			it.toFavouriteCategory()
@@ -89,6 +94,10 @@ class FavouritesRepository @Inject constructor(
 			}
 	}
 
+	suspend fun getAllFavoritesCovers(order: ListSortOrder, limit: Int): List<Cover> {
+		return db.getFavouritesDao().findCovers(order, limit)
+	}
+
 	fun observeCategory(id: Long): Flow<FavouriteCategory?> {
 		return db.getFavouriteCategoriesDao().observe(id)
 			.map { it?.toFavouriteCategory() }

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

@@ -7,7 +7,7 @@ import androidx.recyclerview.widget.RecyclerView
 import com.google.android.material.dialog.MaterialAlertDialogBuilder
 import org.koitharu.kotatsu.R
 import org.koitharu.kotatsu.core.ui.list.ListSelectionController
-import com.google.android.material.R as materialR
+import org.koitharu.kotatsu.core.util.ext.DIALOG_THEME_CENTERED
 
 class CategoriesSelectionCallback(
 	private val recyclerView: RecyclerView,
@@ -75,7 +75,7 @@ class CategoriesSelectionCallback(
 
 	private fun confirmDeleteCategories(ids: Set<Long>, mode: ActionMode) {
 		val context = recyclerView.context
-		MaterialAlertDialogBuilder(context, materialR.style.ThemeOverlay_Material3_MaterialAlertDialog_Centered)
+		MaterialAlertDialogBuilder(context, DIALOG_THEME_CENTERED)
 			.setMessage(R.string.categories_delete_confirm)
 			.setTitle(R.string.remove_category)
 			.setIcon(R.drawable.ic_delete)

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

@@ -76,7 +76,13 @@ class FavouriteCategoriesActivity :
 		}
 	}
 
-	override fun onItemClick(item: FavouriteCategory, view: View) {
+	override fun onItemClick(item: FavouriteCategory?, view: View) {
+		if (item == null) {
+			if (selectionController.count == 0) {
+				startActivity(FavouritesActivity.newIntent(view.context))
+			}
+			return
+		}
 		if (selectionController.onItemClick(item.id)) {
 			return
 		}
@@ -92,8 +98,12 @@ class FavouriteCategoriesActivity :
 		startActivity(intent)
 	}
 
-	override fun onItemLongClick(item: FavouriteCategory, view: View): Boolean {
-		return selectionController.onItemLongClick(item.id)
+	override fun onItemLongClick(item: FavouriteCategory?, view: View): Boolean {
+		return item != null && selectionController.onItemLongClick(item.id)
+	}
+
+	override fun onShowAllClick(isChecked: Boolean) {
+		viewModel.setAllCategoriesVisible(isChecked)
 	}
 
 	override fun onDragHandleTouch(holder: RecyclerView.ViewHolder): Boolean {

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

@@ -5,9 +5,11 @@ import androidx.recyclerview.widget.RecyclerView
 import org.koitharu.kotatsu.core.model.FavouriteCategory
 import org.koitharu.kotatsu.core.ui.list.OnListItemClickListener
 
-interface FavouriteCategoriesListListener : OnListItemClickListener<FavouriteCategory> {
+interface FavouriteCategoriesListListener : OnListItemClickListener<FavouriteCategory?> {
 
 	fun onDragHandleTouch(holder: RecyclerView.ViewHolder): Boolean
 
 	fun onEditClick(item: FavouriteCategory, view: View)
+
+	fun onShowAllClick(isChecked: Boolean)
 }

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

@@ -5,17 +5,21 @@ import dagger.hilt.android.lifecycle.HiltViewModel
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.Job
 import kotlinx.coroutines.cancelAndJoin
+import kotlinx.coroutines.flow.Flow
 import kotlinx.coroutines.flow.SharingStarted
-import kotlinx.coroutines.flow.map
+import kotlinx.coroutines.flow.combine
+import kotlinx.coroutines.flow.mapLatest
 import kotlinx.coroutines.flow.stateIn
 import kotlinx.coroutines.plus
 import org.koitharu.kotatsu.R
 import org.koitharu.kotatsu.core.model.FavouriteCategory
 import org.koitharu.kotatsu.core.prefs.AppSettings
+import org.koitharu.kotatsu.core.prefs.observeAsFlow
 import org.koitharu.kotatsu.core.ui.BaseViewModel
 import org.koitharu.kotatsu.core.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.AllCategoriesListModel
 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
@@ -30,9 +34,13 @@ class FavouritesCategoriesViewModel @Inject constructor(
 
 	private var commitJob: Job? = null
 
-	val content = repository.observeCategoriesWithCovers()
-		.map { it.toUiList() }
-		.stateIn(viewModelScope + Dispatchers.Default, SharingStarted.Eagerly, listOf(LoadingState))
+	val content = combine(
+		repository.observeCategoriesWithCovers(),
+		observeAllCategories(),
+		settings.observeAsFlow(AppSettings.KEY_ALL_FAVOURITES_VISIBLE) { isAllFavouritesVisible },
+	) { cats, all, showAll ->
+		cats.toUiList(all, showAll)
+	}.stateIn(viewModelScope + Dispatchers.Default, SharingStarted.Eagerly, listOf(LoadingState))
 
 	fun deleteCategories(ids: Set<Long>) {
 		launchJob(Dispatchers.Default) {
@@ -74,21 +82,46 @@ class FavouritesCategoriesViewModel @Inject constructor(
 		}
 	}
 
-	private fun Map<FavouriteCategory, List<Cover>>.toUiList(): List<ListModel> = 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,
+	private fun Map<FavouriteCategory, List<Cover>>.toUiList(
+		allFavorites: Pair<Int, List<Cover>>,
+		showAll: Boolean
+	): List<ListModel> {
+		if (isEmpty()) {
+			return listOf(
+				EmptyState(
+					icon = R.drawable.ic_empty_favourites,
+					textPrimary = R.string.text_empty_holder_primary,
+					textSecondary = R.string.empty_favourite_categories,
+					actionStringRes = 0,
+				),
+			)
+		}
+		val result = ArrayList<ListModel>(size + 1)
+		result.add(
+			AllCategoriesListModel(
+				mangaCount = allFavorites.first,
+				covers = allFavorites.second,
+				isVisible = showAll,
 			),
 		)
+		mapTo(result) { (category, covers) ->
+			CategoryListModel(
+				mangaCount = covers.size,
+				covers = covers.take(3),
+				category = category,
+				isTrackerEnabled = settings.isTrackerEnabled && AppSettings.TRACK_FAVOURITES in settings.trackSources,
+			)
+		}
+		return result
+	}
+
+	private fun observeAllCategories(): Flow<Pair<Int, List<Cover>>> {
+		return settings.observeAsFlow(AppSettings.KEY_FAVORITES_ORDER) {
+			allFavoritesSortOrder
+		}.mapLatest { order ->
+			repository.getAllFavoritesCovers(order, limit = 3)
+		}.combine(repository.observeMangaCount()) { covers, count ->
+			count to covers
+		}
 	}
 }

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

@@ -0,0 +1,24 @@
+package org.koitharu.kotatsu.favourites.ui.categories.adapter
+
+import org.koitharu.kotatsu.favourites.domain.model.Cover
+import org.koitharu.kotatsu.list.ui.ListModelDiffCallback
+import org.koitharu.kotatsu.list.ui.model.ListModel
+
+data class AllCategoriesListModel(
+	val mangaCount: Int,
+	val covers: List<Cover>,
+	val isVisible: Boolean,
+) : ListModel {
+
+	override fun areItemsTheSame(other: ListModel): Boolean {
+		return other is AllCategoriesListModel
+	}
+
+	override fun getChangePayload(previousState: ListModel): Any? {
+		return if (previousState is AllCategoriesListModel && previousState.isVisible != isVisible) {
+			ListModelDiffCallback.PAYLOAD_CHECKED_CHANGED
+		} else {
+			super.getChangePayload(previousState)
+		}
+	}
+}

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

@@ -19,6 +19,7 @@ class CategoriesAdapter(
 
 	init {
 		addDelegate(ListItemType.CATEGORY_LARGE, categoryAD(coil, lifecycleOwner, onItemClickListener))
+		addDelegate(ListItemType.NAV_ITEM, allCategoriesAD(coil, lifecycleOwner, onItemClickListener))
 		addDelegate(ListItemType.STATE_EMPTY, emptyStateListAD(coil, lifecycleOwner, listListener))
 		addDelegate(ListItemType.STATE_LOADING, loadingStateAD())
 	}

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

@@ -21,6 +21,7 @@ import org.koitharu.kotatsu.core.util.ext.getAnimationDuration
 import org.koitharu.kotatsu.core.util.ext.getThemeColor
 import org.koitharu.kotatsu.core.util.ext.newImageRequest
 import org.koitharu.kotatsu.core.util.ext.source
+import org.koitharu.kotatsu.databinding.ItemCategoriesAllBinding
 import org.koitharu.kotatsu.databinding.ItemCategoryBinding
 import org.koitharu.kotatsu.favourites.ui.categories.FavouriteCategoriesListListener
 import org.koitharu.kotatsu.list.ui.model.ListModel
@@ -92,3 +93,68 @@ fun categoryAD(
 		}
 	}
 }
+
+fun allCategoriesAD(
+	coil: ImageLoader,
+	lifecycleOwner: LifecycleOwner,
+	clickListener: FavouriteCategoriesListListener,
+) = adapterDelegateViewBinding<AllCategoriesListModel, ListModel, ItemCategoriesAllBinding>(
+	{ inflater, parent -> ItemCategoriesAllBinding.inflate(inflater, parent, false) },
+) {
+	val eventListener = OnClickListener { v ->
+		if (v.id == R.id.imageView_visible) {
+			clickListener.onShowAllClick(!item.isVisible)
+		} else {
+			clickListener.onItemClick(null, v)
+		}
+	}
+	val backgroundColor = context.getThemeColor(android.R.attr.colorBackground)
+	ImageViewCompat.setImageTintList(
+		binding.imageViewCover3,
+		ColorStateList.valueOf(ColorUtils.setAlphaComponent(backgroundColor, 153)),
+	)
+	ImageViewCompat.setImageTintList(
+		binding.imageViewCover2,
+		ColorStateList.valueOf(ColorUtils.setAlphaComponent(backgroundColor, 76)),
+	)
+	binding.imageViewCover2.backgroundTintList =
+		ColorStateList.valueOf(ColorUtils.setAlphaComponent(backgroundColor, 76))
+	binding.imageViewCover3.backgroundTintList =
+		ColorStateList.valueOf(ColorUtils.setAlphaComponent(backgroundColor, 153))
+	val fallback = ColorDrawable(Color.TRANSPARENT)
+	val coverViews = arrayOf(binding.imageViewCover1, binding.imageViewCover2, binding.imageViewCover3)
+	val crossFadeDuration = context.getAnimationDuration(R.integer.config_defaultAnimTime).toInt()
+	itemView.setOnClickListener(eventListener)
+	binding.imageViewVisible.setOnClickListener(eventListener)
+
+	bind {
+		binding.textViewSubtitle.text = if (item.mangaCount == 0) {
+			getString(R.string.empty)
+		} else {
+			context.resources.getQuantityString(
+				R.plurals.items,
+				item.mangaCount,
+				item.mangaCount,
+			)
+		}
+		binding.imageViewVisible.setImageResource(
+			if (item.isVisible) {
+				R.drawable.ic_eye
+			} else {
+				R.drawable.ic_eye_off
+			},
+		)
+		repeat(coverViews.size) { i ->
+			val cover = item.covers.getOrNull(i)
+			coverViews[i].newImageRequest(lifecycleOwner, cover?.url)?.run {
+				placeholder(R.drawable.ic_placeholder)
+				fallback(fallback)
+				source(cover?.mangaSource)
+				crossfade(crossFadeDuration * (i + 1))
+				error(R.drawable.ic_error_placeholder)
+				allowRgb565(true)
+				enqueueWith(coil)
+			}
+		}
+	}
+}

app/src/main/kotlin/org/koitharu/kotatsu/favourites/ui/container/FavouriteTabModel.kt

@@ -4,7 +4,7 @@ import org.koitharu.kotatsu.list.ui.model.ListModel
 
 data class FavouriteTabModel(
 	val id: Long,
-	val title: String,
+	val title: String?,
 ) : ListModel {
 
 	override fun areItemsTheSame(other: ListModel): Boolean {

app/src/main/kotlin/org/koitharu/kotatsu/favourites/ui/container/FavouriteTabPopupMenuProvider.kt

@@ -0,0 +1,53 @@
+package org.koitharu.kotatsu.favourites.ui.container
+
+import android.content.Context
+import android.view.Menu
+import android.view.MenuInflater
+import android.view.MenuItem
+import androidx.core.view.MenuProvider
+import com.google.android.material.dialog.MaterialAlertDialogBuilder
+import org.koitharu.kotatsu.R
+import org.koitharu.kotatsu.core.util.ext.DIALOG_THEME_CENTERED
+import org.koitharu.kotatsu.favourites.ui.categories.edit.FavouritesCategoryEditActivity
+import org.koitharu.kotatsu.favourites.ui.list.FavouritesListFragment.Companion.NO_ID
+
+class FavouriteTabPopupMenuProvider(
+	private val context: Context,
+	private val viewModel: FavouritesContainerViewModel,
+	private val categoryId: Long
+) : MenuProvider {
+
+	override fun onCreateMenu(menu: Menu, menuInflater: MenuInflater) {
+		val menuResId = if (categoryId == NO_ID) {
+			R.menu.popup_fav_tab_all
+		} else {
+			R.menu.popup_fav_tab
+		}
+		menuInflater.inflate(menuResId, menu)
+	}
+
+	override fun onMenuItemSelected(menuItem: MenuItem): Boolean {
+		when (menuItem.itemId) {
+			R.id.action_hide -> viewModel.hide(categoryId)
+			R.id.action_edit -> context.startActivity(
+				FavouritesCategoryEditActivity.newIntent(context, categoryId),
+			)
+
+			R.id.action_delete -> confirmDelete()
+
+			else -> return false
+		}
+		return true
+	}
+
+	private fun confirmDelete() {
+		MaterialAlertDialogBuilder(context, DIALOG_THEME_CENTERED)
+			.setMessage(R.string.categories_delete_confirm)
+			.setTitle(R.string.remove_category)
+			.setIcon(R.drawable.ic_delete)
+			.setNegativeButton(android.R.string.cancel, null)
+			.setPositiveButton(R.string.remove) { _, _ ->
+				viewModel.deleteCategory(categoryId)
+			}.show()
+	}
+}

app/src/main/kotlin/org/koitharu/kotatsu/favourites/ui/container/FavouritesContainerAdapter.kt

@@ -1,33 +1,46 @@
 package org.koitharu.kotatsu.favourites.ui.container
 
 import androidx.fragment.app.Fragment
-import androidx.fragment.app.FragmentManager
-import androidx.fragment.app.FragmentStatePagerAdapter
+import androidx.recyclerview.widget.AdapterListUpdateCallback
+import androidx.recyclerview.widget.AsyncDifferConfig
+import androidx.recyclerview.widget.AsyncListDiffer
+import androidx.viewpager2.adapter.FragmentStateAdapter
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.asExecutor
 import kotlinx.coroutines.flow.FlowCollector
+import org.koitharu.kotatsu.core.util.ContinuationResumeRunnable
 import org.koitharu.kotatsu.favourites.ui.list.FavouritesListFragment
-import org.koitharu.kotatsu.parsers.util.replaceWith
+import org.koitharu.kotatsu.list.ui.ListModelDiffCallback
+import kotlin.coroutines.suspendCoroutine
 
-@Suppress("DEPRECATION")
-class FavouritesContainerAdapter(
-	fm: FragmentManager
-) : FragmentStatePagerAdapter(fm, BEHAVIOR_RESUME_ONLY_CURRENT_FRAGMENT),
+class FavouritesContainerAdapter(fragment: Fragment) : FragmentStateAdapter(fragment),
 	FlowCollector<List<FavouriteTabModel>> {
 
-	private val dataSet = ArrayList<FavouriteTabModel>()
+	private val differ = AsyncListDiffer(
+		AdapterListUpdateCallback(this),
+		AsyncDifferConfig.Builder(ListModelDiffCallback<FavouriteTabModel>())
+			.setBackgroundThreadExecutor(Dispatchers.Default.limitedParallelism(2).asExecutor())
+			.build(),
+	)
 
-	override fun getCount(): Int = dataSet.size
+	override fun getItemCount(): Int = differ.currentList.size
 
-	override fun getItem(position: Int): Fragment {
-		val item = dataSet[position]
+	override fun getItemId(position: Int): Long {
+		return differ.currentList[position].id
+	}
+
+	override fun containsItem(itemId: Long): Boolean {
+		return differ.currentList.any { x -> x.id == itemId }
+	}
+
+	override fun createFragment(position: Int): Fragment {
+		val item = differ.currentList[position]
 		return FavouritesListFragment.newInstance(item.id)
 	}
 
-	override fun getPageTitle(position: Int): CharSequence {
-		return dataSet[position].title
+	override suspend fun emit(value: List<FavouriteTabModel>) = suspendCoroutine { cont ->
+		differ.submitList(value, ContinuationResumeRunnable(cont))
 	}
 
-	override suspend fun emit(value: List<FavouriteTabModel>) {
-		dataSet.replaceWith(value)
-		notifyDataSetChanged()
-	}
+	fun getItem(position: Int): FavouriteTabModel = differ.currentList[position]
 }

app/src/main/kotlin/org/koitharu/kotatsu/favourites/ui/container/FavouritesContainerAdapter2.kt

@@ -1,55 +0,0 @@
-package org.koitharu.kotatsu.favourites.ui.container
-
-import androidx.fragment.app.Fragment
-import androidx.recyclerview.widget.AdapterListUpdateCallback
-import androidx.recyclerview.widget.AsyncDifferConfig
-import androidx.recyclerview.widget.AsyncListDiffer
-import androidx.viewpager2.adapter.FragmentStateAdapter
-import com.google.android.material.tabs.TabLayout
-import com.google.android.material.tabs.TabLayoutMediator.TabConfigurationStrategy
-import kotlinx.coroutines.Dispatchers
-import kotlinx.coroutines.asExecutor
-import kotlinx.coroutines.flow.FlowCollector
-import org.koitharu.kotatsu.core.util.ContinuationResumeRunnable
-import org.koitharu.kotatsu.favourites.ui.list.FavouritesListFragment
-import org.koitharu.kotatsu.list.ui.ListModelDiffCallback
-import kotlin.coroutines.suspendCoroutine
-
-// FIXME migrate to ViewPager2 in FavouritesContainerFragment
-class FavouritesContainerAdapter2(fragment: Fragment) :
-	FragmentStateAdapter(fragment.childFragmentManager, fragment.viewLifecycleOwner.lifecycle),
-	TabConfigurationStrategy,
-	FlowCollector<List<FavouriteTabModel>> {
-
-	private val differ = AsyncListDiffer(
-		AdapterListUpdateCallback(this),
-		AsyncDifferConfig.Builder(ListModelDiffCallback<FavouriteTabModel>())
-			.setBackgroundThreadExecutor(Dispatchers.Default.limitedParallelism(2).asExecutor())
-			.build(),
-	)
-
-	override fun getItemCount(): Int = differ.currentList.size
-
-	override fun getItemId(position: Int): Long {
-		return differ.currentList[position].id
-	}
-
-	override fun containsItem(itemId: Long): Boolean {
-		return differ.currentList.any { x -> x.id == itemId }
-	}
-
-	override fun createFragment(position: Int): Fragment {
-		val item = differ.currentList[position]
-		return FavouritesListFragment.newInstance(item.id)
-	}
-
-	override fun onConfigureTab(tab: TabLayout.Tab, position: Int) {
-		val item = differ.currentList[position]
-		tab.text = item.title
-		tab.tag = item
-	}
-
-	override suspend fun emit(value: List<FavouriteTabModel>) = suspendCoroutine { cont ->
-		differ.submitList(value, ContinuationResumeRunnable(cont))
-	}
-}

app/src/main/kotlin/org/koitharu/kotatsu/favourites/ui/container/FavouritesContainerFragment.kt

@@ -12,14 +12,18 @@ import androidx.core.view.isVisible
 import androidx.core.view.updatePadding
 import androidx.fragment.app.viewModels
 import coil.ImageLoader
+import com.google.android.material.tabs.TabLayoutMediator
 import dagger.hilt.android.AndroidEntryPoint
 import org.koitharu.kotatsu.R
 import org.koitharu.kotatsu.core.ui.BaseFragment
 import org.koitharu.kotatsu.core.ui.util.ActionModeListener
+import org.koitharu.kotatsu.core.ui.util.ReversibleActionObserver
 import org.koitharu.kotatsu.core.util.ext.addMenuProvider
 import org.koitharu.kotatsu.core.util.ext.enqueueWith
 import org.koitharu.kotatsu.core.util.ext.newImageRequest
 import org.koitharu.kotatsu.core.util.ext.observe
+import org.koitharu.kotatsu.core.util.ext.observeEvent
+import org.koitharu.kotatsu.core.util.ext.recyclerView
 import org.koitharu.kotatsu.core.util.ext.setTabsEnabled
 import org.koitharu.kotatsu.core.util.ext.setTextAndVisible
 import org.koitharu.kotatsu.databinding.FragmentFavouritesContainerBinding
@@ -43,15 +47,21 @@ class FavouritesContainerFragment : BaseFragment<FragmentFavouritesContainerBind
 
 	override fun onViewBindingCreated(binding: FragmentFavouritesContainerBinding, savedInstanceState: Bundle?) {
 		super.onViewBindingCreated(binding, savedInstanceState)
-		val adapter = FavouritesContainerAdapter(childFragmentManager)
-		binding.pager.adapter = adapter
-		binding.tabs.setupWithViewPager(binding.pager)
+		val pagerAdapter = FavouritesContainerAdapter(this)
+		binding.pager.adapter = pagerAdapter
 		binding.pager.offscreenPageLimit = 1
+		binding.pager.recyclerView?.isNestedScrollingEnabled = false
+		TabLayoutMediator(
+			binding.tabs,
+			binding.pager,
+			FavouritesTabConfigurationStrategy(pagerAdapter, viewModel),
+		).attach()
 		binding.stubEmpty.setOnInflateListener(this)
 		actionModeDelegate.addListener(this)
-		viewModel.categories.observe(viewLifecycleOwner, adapter)
+		viewModel.categories.observe(viewLifecycleOwner, pagerAdapter)
 		viewModel.isEmpty.observe(viewLifecycleOwner, ::onEmptyStateChanged)
 		addMenuProvider(FavouritesContainerMenuProvider(binding.root.context))
+		viewModel.onActionDone.observeEvent(viewLifecycleOwner, ReversibleActionObserver(binding.pager))
 	}
 
 	override fun onDestroyView() {

app/src/main/kotlin/org/koitharu/kotatsu/favourites/ui/container/FavouritesContainerViewModel.kt

@@ -4,30 +4,80 @@ import androidx.lifecycle.viewModelScope
 import dagger.hilt.android.lifecycle.HiltViewModel
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.flow.SharingStarted
-import kotlinx.coroutines.flow.distinctUntilChanged
+import kotlinx.coroutines.flow.combine
 import kotlinx.coroutines.flow.filterNotNull
 import kotlinx.coroutines.flow.map
 import kotlinx.coroutines.flow.stateIn
 import kotlinx.coroutines.plus
+import org.koitharu.kotatsu.R
+import org.koitharu.kotatsu.core.model.FavouriteCategory
+import org.koitharu.kotatsu.core.prefs.AppSettings
+import org.koitharu.kotatsu.core.prefs.observeAsFlow
 import org.koitharu.kotatsu.core.ui.BaseViewModel
-import org.koitharu.kotatsu.core.util.ext.mapItems
+import org.koitharu.kotatsu.core.ui.util.ReversibleAction
+import org.koitharu.kotatsu.core.ui.util.ReversibleHandle
+import org.koitharu.kotatsu.core.util.ext.MutableEventFlow
+import org.koitharu.kotatsu.core.util.ext.call
 import org.koitharu.kotatsu.favourites.domain.FavouritesRepository
+import org.koitharu.kotatsu.favourites.ui.list.FavouritesListFragment.Companion.NO_ID
 import javax.inject.Inject
 
 @HiltViewModel
 class FavouritesContainerViewModel @Inject constructor(
-	favouritesRepository: FavouritesRepository,
+	private val settings: AppSettings,
+	private val favouritesRepository: FavouritesRepository,
 ) : BaseViewModel() {
 
+	val onActionDone = MutableEventFlow<ReversibleAction>()
+
 	private val categoriesStateFlow = favouritesRepository.observeCategoriesForLibrary()
 		.stateIn(viewModelScope + Dispatchers.Default, SharingStarted.Eagerly, null)
 
-	val categories = categoriesStateFlow.filterNotNull()
-		.mapItems { FavouriteTabModel(it.id, it.title) }
-		.distinctUntilChanged()
-		.stateIn(viewModelScope + Dispatchers.Default, SharingStarted.Eagerly, emptyList())
+	val categories = combine(
+		categoriesStateFlow.filterNotNull(),
+		observeAllFavouritesVisibility(),
+	) { list, showAll ->
+		list.toUi(showAll)
+	}.stateIn(viewModelScope + Dispatchers.Default, SharingStarted.Eagerly, emptyList())
 
 	val isEmpty = categoriesStateFlow.map {
 		it?.isEmpty() == true
 	}.stateIn(viewModelScope + Dispatchers.Default, SharingStarted.Eagerly, false)
+
+	private fun List<FavouriteCategory>.toUi(showAll: Boolean): List<FavouriteTabModel> {
+		if (isEmpty()) {
+			return emptyList()
+		}
+		val result = ArrayList<FavouriteTabModel>(if (showAll) size + 1 else size)
+		if (showAll) {
+			result.add(FavouriteTabModel(NO_ID, null))
+		}
+		mapTo(result) { FavouriteTabModel(it.id, it.title) }
+		return result
+	}
+
+	fun hide(categoryId: Long) {
+		launchJob(Dispatchers.Default) {
+			if (categoryId == NO_ID) {
+				settings.isAllFavouritesVisible = false
+			} else {
+				favouritesRepository.updateCategory(categoryId, isVisibleInLibrary = false)
+				val reverse = ReversibleHandle {
+					favouritesRepository.updateCategory(categoryId, isVisibleInLibrary = true)
+				}
+				onActionDone.call(ReversibleAction(R.string.category_hidden_done, reverse))
+			}
+		}
+	}
+
+	fun deleteCategory(categoryId: Long) {
+		launchJob(Dispatchers.Default) {
+			favouritesRepository.removeCategories(setOf(categoryId))
+		}
+	}
+
+	private fun observeAllFavouritesVisibility() = settings.observeAsFlow(
+		key = AppSettings.KEY_ALL_FAVOURITES_VISIBLE,
+		valueProducer = { isAllFavouritesVisible },
+	)
 }

app/src/main/kotlin/org/koitharu/kotatsu/favourites/ui/container/FavouritesTabConfigurationStrategy.kt

@@ -0,0 +1,19 @@
+package org.koitharu.kotatsu.favourites.ui.container
+
+import com.google.android.material.tabs.TabLayout
+import com.google.android.material.tabs.TabLayoutMediator.TabConfigurationStrategy
+import org.koitharu.kotatsu.R
+import org.koitharu.kotatsu.core.ui.util.PopupMenuMediator
+
+class FavouritesTabConfigurationStrategy(
+	private val adapter: FavouritesContainerAdapter,
+	private val viewModel: FavouritesContainerViewModel,
+) : TabConfigurationStrategy {
+
+	override fun onConfigureTab(tab: TabLayout.Tab, position: Int) {
+		val item = adapter.getItem(position)
+		tab.text = item.title ?: tab.view.context.getString(R.string.all_favourites)
+		tab.tag = item
+		PopupMenuMediator(FavouriteTabPopupMenuProvider(tab.view.context, viewModel, item.id)).attach(tab.view)
+	}
+}

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

@@ -7,10 +7,10 @@ import android.view.View
 import androidx.appcompat.view.ActionMode
 import androidx.appcompat.widget.PopupMenu
 import androidx.fragment.app.viewModels
+import com.google.android.material.dialog.MaterialAlertDialogBuilder
 import dagger.hilt.android.AndroidEntryPoint
 import org.koitharu.kotatsu.R
 import org.koitharu.kotatsu.core.ui.list.ListSelectionController
-import org.koitharu.kotatsu.core.util.ext.addMenuProvider
 import org.koitharu.kotatsu.core.util.ext.sortedByOrdinal
 import org.koitharu.kotatsu.core.util.ext.withArgs
 import org.koitharu.kotatsu.databinding.FragmentListBinding
@@ -30,9 +30,7 @@ class FavouritesListFragment : MangaListFragment(), PopupMenu.OnMenuItemClickLis
 
 	override fun onViewBindingCreated(binding: FragmentListBinding, savedInstanceState: Bundle?) {
 		super.onViewBindingCreated(binding, savedInstanceState)
-		if (viewModel.categoryId != NO_ID) {
-			addMenuProvider(FavouritesListMenuProvider(binding.root.context, viewModel))
-		}
+		binding.recyclerView.isVP2BugWorkaroundEnabled = true
 	}
 
 	override fun onScrolledToEnd() = Unit
@@ -73,6 +71,18 @@ class FavouritesListFragment : MangaListFragment(), PopupMenu.OnMenuItemClickLis
 				true
 			}
 
+			R.id.action_mark_current -> {
+				MaterialAlertDialogBuilder(context ?: return false)
+					.setTitle(item.title)
+					.setMessage(R.string.mark_as_completed_prompt)
+					.setNegativeButton(android.R.string.cancel, null)
+					.setPositiveButton(android.R.string.ok) { _, _ ->
+						viewModel.markAsRead(selectedItems)
+						mode.finish()
+					}.show()
+				true
+			}
+
 			else -> super.onActionItemClicked(controller, mode, item)
 		}
 	}

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

@@ -1,30 +0,0 @@
-package org.koitharu.kotatsu.favourites.ui.list
-
-import android.content.Context
-import android.view.Menu
-import android.view.MenuInflater
-import android.view.MenuItem
-import androidx.core.view.MenuProvider
-import org.koitharu.kotatsu.R
-import org.koitharu.kotatsu.favourites.ui.categories.edit.FavouritesCategoryEditActivity
-
-class FavouritesListMenuProvider(
-	private val context: Context,
-	private val viewModel: FavouritesListViewModel,
-) : MenuProvider {
-
-	override fun onCreateMenu(menu: Menu, menuInflater: MenuInflater) {
-		menuInflater.inflate(R.menu.opt_favourites, menu)
-	}
-
-	override fun onMenuItemSelected(menuItem: MenuItem): Boolean {
-		return when (menuItem.itemId) {
-			R.id.action_edit -> {
-				context.startActivity(FavouritesCategoryEditActivity.newIntent(context, viewModel.categoryId))
-				true
-			}
-
-			else -> false
-		}
-	}
-}

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

@@ -9,6 +9,8 @@ import kotlinx.coroutines.flow.SharingStarted
 import kotlinx.coroutines.flow.StateFlow
 import kotlinx.coroutines.flow.catch
 import kotlinx.coroutines.flow.combine
+import kotlinx.coroutines.flow.filterNotNull
+import kotlinx.coroutines.flow.flatMapLatest
 import kotlinx.coroutines.flow.map
 import kotlinx.coroutines.flow.stateIn
 import kotlinx.coroutines.plus
@@ -21,6 +23,7 @@ import org.koitharu.kotatsu.download.ui.worker.DownloadWorker
 import org.koitharu.kotatsu.favourites.domain.FavouritesRepository
 import org.koitharu.kotatsu.favourites.ui.list.FavouritesListFragment.Companion.ARG_CATEGORY_ID
 import org.koitharu.kotatsu.favourites.ui.list.FavouritesListFragment.Companion.NO_ID
+import org.koitharu.kotatsu.history.domain.MarkAsReadUseCase
 import org.koitharu.kotatsu.list.domain.ListExtraProvider
 import org.koitharu.kotatsu.list.domain.ListSortOrder
 import org.koitharu.kotatsu.list.ui.MangaListViewModel
@@ -28,6 +31,7 @@ import org.koitharu.kotatsu.list.ui.model.EmptyState
 import org.koitharu.kotatsu.list.ui.model.LoadingState
 import org.koitharu.kotatsu.list.ui.model.toErrorState
 import org.koitharu.kotatsu.list.ui.model.toUi
+import org.koitharu.kotatsu.parsers.model.Manga
 import javax.inject.Inject
 
 @HiltViewModel
@@ -35,31 +39,37 @@ class FavouritesListViewModel @Inject constructor(
 	savedStateHandle: SavedStateHandle,
 	private val repository: FavouritesRepository,
 	private val listExtraProvider: ListExtraProvider,
+	private val markAsReadUseCase: MarkAsReadUseCase,
 	settings: AppSettings,
 	downloadScheduler: DownloadWorker.Scheduler,
 ) : MangaListViewModel(settings, downloadScheduler) {
 
 	val categoryId: Long = savedStateHandle[ARG_CATEGORY_ID] ?: NO_ID
+	private val refreshTrigger = MutableStateFlow(Any())
 
 	override val listMode = settings.observeAsFlow(AppSettings.KEY_LIST_MODE_FAVORITES) { favoritesListMode }
 		.stateIn(viewModelScope + Dispatchers.Default, SharingStarted.Eagerly, settings.favoritesListMode)
 
 	val sortOrder: StateFlow<ListSortOrder?> = if (categoryId == NO_ID) {
-		MutableStateFlow(null)
+		settings.observeAsFlow(AppSettings.KEY_FAVORITES_ORDER) {
+			allFavoritesSortOrder
+		}
 	} else {
 		repository.observeCategory(categoryId)
 			.map { it?.order }
-			.stateIn(viewModelScope + Dispatchers.Default, SharingStarted.Eagerly, null)
-	}
+	}.stateIn(viewModelScope + Dispatchers.Default, SharingStarted.Eagerly, null)
 
 	override val content = combine(
 		if (categoryId == NO_ID) {
-			repository.observeAll(ListSortOrder.NEWEST)
+			sortOrder.filterNotNull().flatMapLatest {
+				repository.observeAll(it)
+			}
 		} else {
 			repository.observeAll(categoryId)
 		},
 		listMode,
-	) { list, mode ->
+		refreshTrigger,
+	) { list, mode, _ ->
 		when {
 			list.isEmpty() -> listOf(
 				EmptyState(
@@ -80,10 +90,19 @@ class FavouritesListViewModel @Inject constructor(
 		emit(listOf(it.toErrorState(canRetry = false)))
 	}.stateIn(viewModelScope + Dispatchers.Default, SharingStarted.Eagerly, listOf(LoadingState))
 
-	override fun onRefresh() = Unit
+	override fun onRefresh() {
+		refreshTrigger.value = Any()
+	}
 
 	override fun onRetry() = Unit
 
+	fun markAsRead(items: Set<Manga>) {
+		launchLoadingJob(Dispatchers.Default) {
+			markAsReadUseCase(items)
+			onRefresh()
+		}
+	}
+
 	fun removeFromFavourites(ids: Set<Long>) {
 		if (ids.isEmpty()) {
 			return

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

@@ -35,11 +35,12 @@ abstract class HistoryDao {
 
 	fun observeAll(order: ListSortOrder): Flow<List<HistoryWithManga>> {
 		val orderBy = when (order) {
-			ListSortOrder.UPDATED -> "history.updated_at DESC"
+			ListSortOrder.LAST_READ -> "history.updated_at DESC"
 			ListSortOrder.NEWEST -> "history.created_at DESC"
 			ListSortOrder.PROGRESS -> "history.percent DESC"
 			ListSortOrder.ALPHABETIC -> "manga.title"
-			ListSortOrder.NEW_CHAPTERS -> "(SELECT chapters_new FROM tracks WHERE tracks.manga_id = manga.manga_id) DESC"
+			ListSortOrder.ALPHABETIC_REVERSE -> "manga.title DESC"
+			ListSortOrder.NEW_CHAPTERS -> "IFNULL((SELECT chapters_new FROM tracks WHERE tracks.manga_id = manga.manga_id), 0) DESC"
 			else -> throw IllegalArgumentException("Sort order $order is not supported")
 		}
 

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

@@ -15,6 +15,7 @@ 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.model.isLocal
+import org.koitharu.kotatsu.core.model.isNsfw
 import org.koitharu.kotatsu.core.parser.MangaDataRepository
 import org.koitharu.kotatsu.core.prefs.AppSettings
 import org.koitharu.kotatsu.core.ui.util.ReversibleHandle
@@ -161,7 +162,7 @@ class HistoryRepository @Inject constructor(
 	}
 
 	fun shouldSkip(manga: Manga): Boolean {
-		return manga.isNsfw && settings.isHistoryExcludeNsfw || settings.isIncognitoModeEnabled
+		return ((manga.source.isNsfw() || manga.isNsfw) && settings.isHistoryExcludeNsfw) || settings.isIncognitoModeEnabled
 	}
 
 	fun observeShouldSkip(manga: Manga): Flow<Boolean> {

app/src/main/kotlin/org/koitharu/kotatsu/history/domain/MarkAsReadUseCase.kt

@@ -0,0 +1,49 @@
+package org.koitharu.kotatsu.history.domain
+
+import dagger.Reusable
+import kotlinx.coroutines.joinAll
+import kotlinx.coroutines.launch
+import kotlinx.coroutines.supervisorScope
+import org.koitharu.kotatsu.core.parser.MangaRepository
+import org.koitharu.kotatsu.history.data.HistoryRepository
+import org.koitharu.kotatsu.parsers.model.Manga
+import javax.inject.Inject
+
+@Reusable
+class MarkAsReadUseCase @Inject constructor(
+	private val historyRepository: HistoryRepository,
+	private val mangaRepositoryFactory: MangaRepository.Factory,
+) {
+
+	suspend operator fun invoke(manga: Manga) {
+		val repo = mangaRepositoryFactory.create(manga.source)
+		val details = if (manga.chapters.isNullOrEmpty()) {
+			repo.getDetails(manga)
+		} else {
+			manga
+		}
+		val lastChapter = checkNotNull(details.chapters).last()
+		val pages = repo.getPages(lastChapter)
+		historyRepository.addOrUpdate(
+			manga = details,
+			chapterId = lastChapter.id,
+			page = pages.lastIndex,
+			scroll = 0,
+			percent = 1f,
+		)
+	}
+
+	suspend operator fun invoke(manga: Collection<Manga>) {
+		when (manga.size) {
+			0 -> Unit
+			1 -> invoke(manga.first())
+			else -> supervisorScope {
+				manga.map {
+					launch {
+						invoke(it)
+					}
+				}.joinAll()
+			}
+		}
+	}
+}

app/src/main/kotlin/org/koitharu/kotatsu/history/ui/HistoryListAdapter.kt

@@ -6,7 +6,6 @@ import coil.ImageLoader
 import org.koitharu.kotatsu.core.ui.list.fastscroll.FastScroller
 import org.koitharu.kotatsu.list.ui.adapter.MangaListAdapter
 import org.koitharu.kotatsu.list.ui.adapter.MangaListListener
-import org.koitharu.kotatsu.list.ui.model.ListHeader
 import org.koitharu.kotatsu.list.ui.size.ItemSizeResolver
 
 class HistoryListAdapter(
@@ -17,13 +16,6 @@ class HistoryListAdapter(
 ) : MangaListAdapter(coil, lifecycleOwner, listener, sizeResolver), FastScroller.SectionIndexer {
 
 	override fun getSectionText(context: Context, position: Int): CharSequence? {
-		val list = items
-		for (i in (0..position).reversed()) {
-			val item = list.getOrNull(i) ?: continue
-			if (item is ListHeader) {
-				return item.getText(context)
-			}
-		}
-		return null
+		return findHeader(position)?.getText(context)
 	}
 }

app/src/main/kotlin/org/koitharu/kotatsu/history/ui/HistoryListFragment.kt

@@ -5,6 +5,7 @@ import android.view.Menu
 import android.view.MenuItem
 import androidx.appcompat.view.ActionMode
 import androidx.fragment.app.viewModels
+import com.google.android.material.dialog.MaterialAlertDialogBuilder
 import dagger.hilt.android.AndroidEntryPoint
 import org.koitharu.kotatsu.R
 import org.koitharu.kotatsu.core.os.NetworkManageIntent
@@ -54,6 +55,18 @@ class HistoryListFragment : MangaListFragment() {
 				true
 			}
 
+			R.id.action_mark_current -> {
+				MaterialAlertDialogBuilder(context ?: return false)
+					.setTitle(item.title)
+					.setMessage(R.string.mark_as_completed_prompt)
+					.setNegativeButton(android.R.string.cancel, null)
+					.setPositiveButton(android.R.string.ok) { _, _ ->
+						viewModel.markAsRead(selectedItems)
+						mode.finish()
+					}.show()
+				true
+			}
+
 			else -> super.onActionItemClicked(controller, mode, item)
 		}
 	}

app/src/main/kotlin/org/koitharu/kotatsu/history/ui/HistoryListMenuProvider.kt

@@ -8,6 +8,7 @@ import androidx.core.view.MenuProvider
 import com.google.android.material.dialog.MaterialAlertDialogBuilder
 import org.koitharu.kotatsu.R
 import org.koitharu.kotatsu.core.ui.dialog.RememberSelectionDialogListener
+import org.koitharu.kotatsu.core.util.ext.DIALOG_THEME_CENTERED
 import java.time.Instant
 import java.time.LocalDate
 import java.time.ZoneId
@@ -36,7 +37,7 @@ class HistoryListMenuProvider(
 
 	private fun showClearHistoryDialog() {
 		val selectionListener = RememberSelectionDialogListener(2)
-		MaterialAlertDialogBuilder(context, materialR.style.ThemeOverlay_Material3_MaterialAlertDialog_Centered)
+		MaterialAlertDialogBuilder(context, DIALOG_THEME_CENTERED)
 			.setTitle(R.string.clear_history)
 			.setSingleChoiceItems(
 				arrayOf(

app/src/main/kotlin/org/koitharu/kotatsu/history/ui/HistoryListViewModel.kt

@@ -25,6 +25,7 @@ import org.koitharu.kotatsu.core.util.ext.call
 import org.koitharu.kotatsu.core.util.ext.onFirst
 import org.koitharu.kotatsu.download.ui.worker.DownloadWorker
 import org.koitharu.kotatsu.history.data.HistoryRepository
+import org.koitharu.kotatsu.history.domain.MarkAsReadUseCase
 import org.koitharu.kotatsu.history.domain.model.MangaWithHistory
 import org.koitharu.kotatsu.list.domain.ListExtraProvider
 import org.koitharu.kotatsu.list.domain.ListSortOrder
@@ -39,6 +40,7 @@ import org.koitharu.kotatsu.list.ui.model.toGridModel
 import org.koitharu.kotatsu.list.ui.model.toListDetailedModel
 import org.koitharu.kotatsu.list.ui.model.toListModel
 import org.koitharu.kotatsu.local.data.LocalMangaRepository
+import org.koitharu.kotatsu.parsers.model.Manga
 import java.time.Instant
 import javax.inject.Inject
 
@@ -48,6 +50,7 @@ class HistoryListViewModel @Inject constructor(
 	settings: AppSettings,
 	private val extraProvider: ListExtraProvider,
 	private val localMangaRepository: LocalMangaRepository,
+	private val markAsReadUseCase: MarkAsReadUseCase,
 	networkState: NetworkState,
 	downloadScheduler: DownloadWorker.Scheduler,
 ) : MangaListViewModel(settings, downloadScheduler) {
@@ -121,6 +124,12 @@ class HistoryListViewModel @Inject constructor(
 		}
 	}
 
+	fun markAsRead(items: Set<Manga>) {
+		launchLoadingJob(Dispatchers.Default) {
+			markAsReadUseCase(items)
+		}
+	}
+
 	private suspend fun mapList(
 		list: List<MangaWithHistory>,
 		grouped: Boolean,
@@ -163,7 +172,7 @@ class HistoryListViewModel @Inject constructor(
 	}
 
 	private fun MangaHistory.header(order: ListSortOrder): ListHeader? = when (order) {
-		ListSortOrder.UPDATED -> ListHeader(calculateTimeAgo(updatedAt))
+		ListSortOrder.LAST_READ -> ListHeader(calculateTimeAgo(updatedAt))
 		ListSortOrder.NEWEST -> ListHeader(calculateTimeAgo(createdAt))
 		ListSortOrder.PROGRESS -> ListHeader(
 			when (percent) {
@@ -175,6 +184,7 @@ class HistoryListViewModel @Inject constructor(
 		)
 
 		ListSortOrder.ALPHABETIC,
+		ListSortOrder.ALPHABETIC_REVERSE,
 		ListSortOrder.RELEVANCE,
 		ListSortOrder.NEW_CHAPTERS,
 		ListSortOrder.RATING -> null

app/src/main/kotlin/org/koitharu/kotatsu/list/domain/ListSortOrder.kt

@@ -9,21 +9,22 @@ enum class ListSortOrder(
 	@StringRes val titleResId: Int,
 ) {
 
-	UPDATED(R.string.updated),
 	NEWEST(R.string.order_added),
 	PROGRESS(R.string.progress),
 	ALPHABETIC(R.string.by_name),
+	ALPHABETIC_REVERSE(R.string.by_name_reverse),
 	RATING(R.string.by_rating),
 	RELEVANCE(R.string.by_relevance),
 	NEW_CHAPTERS(R.string.new_chapters),
+	LAST_READ(R.string.last_read),
 	;
 
-	fun isGroupingSupported() = this == UPDATED || this == NEWEST || this == PROGRESS
+	fun isGroupingSupported() = this == LAST_READ || this == NEWEST || this == PROGRESS
 
 	companion object {
 
-		val HISTORY: Set<ListSortOrder> = EnumSet.of(UPDATED, NEWEST, PROGRESS, ALPHABETIC, NEW_CHAPTERS)
-		val FAVORITES: Set<ListSortOrder> = EnumSet.of(ALPHABETIC, NEWEST, RATING, NEW_CHAPTERS, PROGRESS)
+		val HISTORY: Set<ListSortOrder> = EnumSet.of(LAST_READ, NEWEST, PROGRESS, ALPHABETIC, ALPHABETIC_REVERSE, NEW_CHAPTERS)
+		val FAVORITES: Set<ListSortOrder> = EnumSet.of(ALPHABETIC, ALPHABETIC_REVERSE, NEWEST, RATING, NEW_CHAPTERS, PROGRESS, LAST_READ)
 		val SUGGESTIONS: Set<ListSortOrder> = EnumSet.of(RELEVANCE)
 
 		operator fun invoke(value: String, fallback: ListSortOrder) = entries.find(value) ?: fallback

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

@@ -83,4 +83,5 @@ class TypedListSpacingDecoration(
 	private fun ListItemType?.isEdgeToEdge() = this == ListItemType.MANGA_NESTED_GROUP
 		|| this == ListItemType.FILTER_SORT
 		|| this == ListItemType.FILTER_TAG
+		|| this == ListItemType.CHAPTER
 }

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

@@ -9,6 +9,7 @@ import org.koitharu.kotatsu.core.ui.BaseViewModel
 import org.koitharu.kotatsu.core.util.ext.require
 import org.koitharu.kotatsu.core.util.ext.sortedByOrdinal
 import org.koitharu.kotatsu.favourites.domain.FavouritesRepository
+import org.koitharu.kotatsu.favourites.ui.list.FavouritesListFragment.Companion.NO_ID
 import org.koitharu.kotatsu.list.domain.ListSortOrder
 import org.koitharu.kotatsu.parsers.util.runCatchingCancellable
 import javax.inject.Inject
@@ -65,7 +66,11 @@ class ListConfigViewModel @Inject constructor(
 		val value = getSortOrders()?.getOrNull(position) ?: return
 		when (section) {
 			is ListConfigSection.Favorites -> launchJob {
-				favouritesRepository.setCategoryOrder(section.categoryId, value)
+				if (section.categoryId == NO_ID) {
+					settings.allFavoritesSortOrder = value
+				} else {
+					favouritesRepository.setCategoryOrder(section.categoryId, value)
+				}
 			}
 
 			ListConfigSection.General -> Unit
@@ -75,9 +80,13 @@ class ListConfigViewModel @Inject constructor(
 		}
 	}
 
-	private fun getCategorySortOrder(id: Long): ListSortOrder = runBlocking {
+	private fun getCategorySortOrder(id: Long): ListSortOrder = if (id == NO_ID) {
+		settings.allFavoritesSortOrder
+	} else runBlocking {
 		runCatchingCancellable {
 			favouritesRepository.getCategory(id).order
-		}.getOrDefault(ListSortOrder.NEWEST)
+		}.getOrElse {
+			settings.allFavoritesSortOrder
+		}
 	}
 }

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

@@ -12,6 +12,8 @@ import org.koitharu.kotatsu.parsers.model.MangaState
 import org.koitharu.kotatsu.parsers.model.MangaTag
 import org.koitharu.kotatsu.parsers.util.find
 import org.koitharu.kotatsu.parsers.util.json.getBooleanOrDefault
+import org.koitharu.kotatsu.parsers.util.json.getFloatOrDefault
+import org.koitharu.kotatsu.parsers.util.json.getIntOrDefault
 import org.koitharu.kotatsu.parsers.util.json.getLongOrDefault
 import org.koitharu.kotatsu.parsers.util.json.getStringOrNull
 import org.koitharu.kotatsu.parsers.util.json.mapJSONToSet
@@ -91,6 +93,7 @@ class MangaIndex(source: String?) {
 		if (!chapters.has(chapter.id.toString())) {
 			val jo = JSONObject()
 			jo.put("number", chapter.number)
+			jo.put("volume", chapter.volume)
 			jo.put("url", chapter.url)
 			jo.put("name", chapter.name)
 			jo.put("uploadDate", chapter.uploadDate)
@@ -162,7 +165,8 @@ class MangaIndex(source: String?) {
 					id = k.toLong(),
 					name = v.getString("name"),
 					url = v.getString("url"),
-					number = v.getInt("number"),
+					number = v.getFloatOrDefault("number", 0f),
+					volume = v.getIntOrDefault("volume", 0),
 					uploadDate = v.getLongOrDefault("uploadDate", 0L),
 					scanlator = v.getStringOrNull("scanlator"),
 					branch = v.getStringOrNull("branch"),

app/src/main/kotlin/org/koitharu/kotatsu/local/data/importer/SingleMangaImporter.kt

@@ -47,7 +47,7 @@ class SingleMangaImporter @Inject constructor(
 		val contentResolver = storageManager.contentResolver
 		val name = contentResolver.resolveName(uri) ?: throw IOException("Cannot fetch name from uri: $uri")
 		if (!hasCbzExtension(name)) {
-			throw UnsupportedFileException("Unsupported file on $uri")
+			throw UnsupportedFileException("Unsupported file $name on $uri")
 		}
 		val dest = File(getOutputDir(), name)
 		runInterruptible {

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

@@ -71,7 +71,8 @@ class LocalMangaDirInput(root: File) : LocalMangaInput(root) {
 				MangaChapter(
 					id = "$i${f.name}".longHashCode(),
 					name = f.nameWithoutExtension.toHumanReadable(),
-					number = i + 1,
+					number = 0f,
+					volume = 0,
 					source = MangaSource.LOCAL,
 					uploadDate = f.creationTime,
 					url = f.toUri().toString(),

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

@@ -100,6 +100,7 @@ sealed class LocalMangaInput(
 			id = id,
 			name = name,
 			number = number,
+			volume = volume,
 			url = url,
 			scanlator = scanlator,
 			uploadDate = uploadDate,

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

@@ -76,7 +76,8 @@ class LocalMangaZipInput(root: File) : LocalMangaInput(root) {
 							MangaChapter(
 								id = "$i$s".longHashCode(),
 								name = s.ifEmpty { title },
-								number = i + 1,
+								number = 0f,
+								volume = 0,
 								source = MangaSource.LOCAL,
 								uploadDate = 0L,
 								url = uriBuilder.fragment(s).build().toString(),

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

@@ -9,13 +9,20 @@ import android.widget.Toast
 import androidx.activity.result.contract.ActivityResultContracts
 import androidx.fragment.app.FragmentManager
 import com.google.android.material.dialog.MaterialAlertDialogBuilder
+import dagger.hilt.android.AndroidEntryPoint
 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
+import org.koitharu.kotatsu.local.data.LocalStorageManager
+import javax.inject.Inject
 
+@AndroidEntryPoint
 class ImportDialogFragment : AlertDialogFragment<DialogImportBinding>(), View.OnClickListener {
 
+	@Inject
+	lateinit var storageManager: LocalStorageManager
+
 	private val importFileCall = registerForActivityResult(ActivityResultContracts.OpenMultipleDocuments()) {
 		startImport(it)
 	}
@@ -55,6 +62,9 @@ class ImportDialogFragment : AlertDialogFragment<DialogImportBinding>(), View.On
 		if (uris.isEmpty()) {
 			return
 		}
+		uris.forEach {
+			storageManager.takePermissions(it)
+		}
 		val ctx = requireContext()
 		ImportWorker.start(ctx, uris)
 		Toast.makeText(ctx, R.string.import_will_start_soon, Toast.LENGTH_LONG).show()

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

@@ -26,6 +26,15 @@ import org.koitharu.kotatsu.remotelist.ui.RemoteListFragment
 
 class LocalListFragment : MangaListFragment(), FilterOwner {
 
+	init {
+		withArgs(1) {
+			putSerializable(
+				RemoteListFragment.ARG_SOURCE,
+				MangaSource.LOCAL,
+			) // required by FilterCoordinator
+		}
+	}
+
 	override val viewModel by viewModels<LocalListViewModel>()
 
 	override val filter: MangaFilter
@@ -97,14 +106,4 @@ class LocalListFragment : MangaListFragment(), FilterOwner {
 			Snackbar.LENGTH_SHORT,
 		).show()
 	}
-
-	companion object {
-
-		fun newInstance() = LocalListFragment().withArgs(1) {
-			putSerializable(
-				RemoteListFragment.ARG_SOURCE,
-				MangaSource.LOCAL,
-			) // required by FilterCoordinator
-		}
-	}
 }

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

@@ -134,13 +134,13 @@ class MainNavigationDelegate(
 	private fun onNavigationItemSelected(@IdRes itemId: Int): Boolean {
 		return setPrimaryFragment(
 			when (itemId) {
-				R.id.nav_history -> HistoryListFragment()
-				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()
+				R.id.nav_history -> HistoryListFragment::class.java
+				R.id.nav_favorites -> FavouritesContainerFragment::class.java
+				R.id.nav_explore -> ExploreFragment::class.java
+				R.id.nav_feed -> FeedFragment::class.java
+				R.id.nav_local -> LocalListFragment::class.java
+				R.id.nav_suggestions -> SuggestionsFragment::class.java
+				R.id.nav_bookmarks -> BookmarksFragment::class.java
 				else -> return false
 			},
 		)
@@ -157,16 +157,17 @@ class MainNavigationDelegate(
 		else -> 0
 	}
 
-	private fun setPrimaryFragment(fragment: Fragment): Boolean {
-		if (fragmentManager.isStateSaved) {
+	private fun setPrimaryFragment(fragmentClass: Class<out Fragment>): Boolean {
+		if (fragmentManager.isStateSaved || fragmentClass.isInstance(primaryFragment)) {
 			return false
 		}
+		val fragment = instantiateFragment(fragmentClass)
 		fragment.enterTransition = MaterialFadeThrough()
 		fragmentManager.beginTransaction()
 			.setReorderingAllowed(true)
-			.replace(R.id.container, fragment, TAG_PRIMARY)
+			.replace(R.id.container, fragmentClass, null, TAG_PRIMARY)
+			.runOnCommit { onFragmentChanged(fragment, fromUser = true) }
 			.commit()
-		onFragmentChanged(fragment, fromUser = true)
 		return true
 	}
 
@@ -182,6 +183,11 @@ class MainNavigationDelegate(
 		}
 	}
 
+	private fun instantiateFragment(fragmentClass: Class<out Fragment>): Fragment {
+		val classLoader = navBar.context.classLoader
+		return fragmentManager.fragmentFactory.instantiate(classLoader, fragmentClass.name)
+	}
+
 	private fun observeSettings(lifecycleOwner: LifecycleOwner) {
 		settings.observe()
 			.filter { x -> x == AppSettings.KEY_TRACKER_ENABLED || x == AppSettings.KEY_SUGGESTIONS }

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

@@ -201,7 +201,7 @@ class PageLoader @Inject constructor(
 
 	private suspend fun loadPageImpl(page: MangaPage, progress: MutableStateFlow<Float>): Uri = semaphore.withPermit {
 		val pageUrl = getPageUrl(page)
-		check(pageUrl.isNotBlank()) { "Cannot obtain full image url" }
+		check(pageUrl.isNotBlank()) { "Cannot obtain full image url for $page" }
 		val uri = Uri.parse(pageUrl)
 		return if (uri.isZipUri()) {
 			if (uri.scheme == URI_SCHEME_ZIP) {

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

@@ -8,6 +8,8 @@ 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.MangaHistory
+import org.koitharu.kotatsu.core.model.findById
 import org.koitharu.kotatsu.core.prefs.AppSettings
 import org.koitharu.kotatsu.core.ui.list.OnListItemClickListener
 import org.koitharu.kotatsu.core.ui.sheet.BaseAdaptiveSheet
@@ -15,9 +17,13 @@ import org.koitharu.kotatsu.core.util.RecyclerViewScrollCallback
 import org.koitharu.kotatsu.core.util.ext.showDistinct
 import org.koitharu.kotatsu.databinding.SheetChaptersBinding
 import org.koitharu.kotatsu.details.ui.adapter.ChaptersAdapter
+import org.koitharu.kotatsu.details.ui.mapChapters
 import org.koitharu.kotatsu.details.ui.model.ChapterListItem
-import org.koitharu.kotatsu.details.ui.model.toListItem
+import org.koitharu.kotatsu.details.ui.withVolumeHeaders
+import org.koitharu.kotatsu.history.data.PROGRESS_NONE
+import org.koitharu.kotatsu.list.ui.adapter.TypedListSpacingDecoration
 import org.koitharu.kotatsu.parsers.model.MangaChapter
+import java.time.Instant
 import javax.inject.Inject
 import kotlin.math.roundToInt
 
@@ -37,32 +43,48 @@ class ChaptersSheet : BaseAdaptiveSheet<SheetChaptersBinding>(),
 
 	override fun onViewBindingCreated(binding: SheetChaptersBinding, savedInstanceState: Bundle?) {
 		super.onViewBindingCreated(binding, savedInstanceState)
-		val chapters = viewModel.manga?.allChapters
-		if (chapters.isNullOrEmpty()) {
+		val manga = viewModel.manga
+		if (manga == null) {
 			dismissAllowingStateLoss()
 			return
 		}
-		val currentId = viewModel.getCurrentState()?.chapterId ?: 0L
-		val currentPosition = chapters.indexOfFirst { it.id == currentId }
-		val items = chapters.mapIndexed { index, chapter ->
-			chapter.toListItem(
-				isCurrent = index == currentPosition,
-				isUnread = index > currentPosition,
-				isNew = false,
-				isDownloaded = false,
-				isBookmarked = false,
-			)
+		val state = viewModel.getCurrentState()
+		val currentChapter = state?.let { manga.allChapters.findById(it.chapterId) }
+		val chapters = manga.mapChapters(
+			history = state?.let {
+				MangaHistory(
+					createdAt = Instant.now(),
+					updatedAt = Instant.now(),
+					chapterId = it.chapterId,
+					page = it.page,
+					scroll = it.scroll,
+					percent = PROGRESS_NONE,
+				)
+			},
+			newCount = 0,
+			branch = currentChapter?.branch,
+			bookmarks = listOf(),
+		).withVolumeHeaders(binding.root.context)
+		if (chapters.isEmpty()) {
+			dismissAllowingStateLoss()
+			return
 		}
+		val currentPosition = if (currentChapter != null) {
+			chapters.indexOfFirst { it is ChapterListItem && it.chapter.id == currentChapter.id }
+		} else {
+			-1
+		}
+		binding.recyclerView.addItemDecoration(TypedListSpacingDecoration(binding.recyclerView.context, true))
 		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()
 				adapter.setItems(
-					items, RecyclerViewScrollCallback(binding.recyclerView, targetPosition, offset),
+					chapters, RecyclerViewScrollCallback(binding.recyclerView, targetPosition, offset),
 				)
 			} else {
-				adapter.items = items
+				adapter.items = chapters
 			}
 		}
 	}

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

@@ -10,8 +10,6 @@ import android.transition.TransitionManager
 import android.transition.TransitionSet
 import android.view.Gravity
 import android.view.KeyEvent
-import android.view.Menu
-import android.view.MenuItem
 import android.view.MotionEvent
 import android.view.View
 import android.view.ViewGroup.MarginLayoutParams
@@ -40,6 +38,7 @@ import org.koitharu.kotatsu.core.parser.MangaIntent
 import org.koitharu.kotatsu.core.prefs.AppSettings
 import org.koitharu.kotatsu.core.prefs.ReaderMode
 import org.koitharu.kotatsu.core.ui.BaseFullscreenActivity
+import org.koitharu.kotatsu.core.ui.util.MenuInvalidator
 import org.koitharu.kotatsu.core.ui.widgets.ZoomControl
 import org.koitharu.kotatsu.core.util.GridTouchHelper
 import org.koitharu.kotatsu.core.util.IdlingDetector
@@ -60,8 +59,6 @@ import org.koitharu.kotatsu.reader.ui.config.ReaderConfigSheet
 import org.koitharu.kotatsu.reader.ui.pager.ReaderPage
 import org.koitharu.kotatsu.reader.ui.pager.ReaderUiState
 import org.koitharu.kotatsu.reader.ui.thumbnails.OnPageSelectListener
-import org.koitharu.kotatsu.reader.ui.thumbnails.PagesThumbnailsSheet
-import org.koitharu.kotatsu.settings.SettingsActivity
 import java.util.concurrent.TimeUnit
 import javax.inject.Inject
 
@@ -111,7 +108,6 @@ class ReaderActivity :
 		touchHelper = GridTouchHelper(this, this)
 		scrollTimer = scrollTimerFactory.create(this, this)
 		controlDelegate = ReaderControlDelegate(resources, settings, this, this)
-		viewBinding.toolbarBottom.setOnMenuItemClickListener(::onOptionsItemSelected)
 		viewBinding.slider.setLabelFormatter(PageLabelFormatter())
 		viewBinding.zoomControl.listener = this
 		ReaderSliderListener(this, viewModel).attachToSlider(viewBinding.slider)
@@ -140,10 +136,11 @@ class ReaderActivity :
 		viewModel.content.observe(this) {
 			onLoadingStateChanged(viewModel.isLoading.value)
 		}
+		viewModel.incognitoMode.observe(this, MenuInvalidator(this))
 		viewModel.isScreenshotsBlockEnabled.observe(this, this::setWindowSecure)
 		viewModel.isKeepScreenOnEnabled.observe(this, this::setKeepScreenOn)
 		viewModel.isInfoBarEnabled.observe(this, ::onReaderBarChanged)
-		viewModel.isBookmarkAdded.observe(this, this::onBookmarkStateChanged)
+		viewModel.isBookmarkAdded.observe(this, MenuInvalidator(viewBinding.toolbarBottom))
 		viewModel.onShowToast.observeEvent(this) { msgId ->
 			Snackbar.make(viewBinding.container, msgId, Snackbar.LENGTH_SHORT)
 				.setAnchorView(viewBinding.appbarBottom)
@@ -152,6 +149,8 @@ class ReaderActivity :
 		viewModel.isZoomControlsEnabled.observe(this) {
 			viewBinding.zoomControl.isVisible = it
 		}
+		addMenuProvider(ReaderTopMenuProvider(this, viewModel))
+		viewBinding.toolbarBottom.addMenuProvider(ReaderBottomMenuProvider(this, readerManager, viewModel))
 	}
 
 	override fun getParentActivityIntent(): Intent? {
@@ -190,50 +189,6 @@ class ReaderActivity :
 		viewBinding.slider.isRtl = mode == ReaderMode.REVERSED
 	}
 
-	override fun onCreateOptionsMenu(menu: Menu): Boolean {
-		menuInflater.inflate(R.menu.opt_reader_top, menu)
-		return super.onCreateOptionsMenu(menu)
-	}
-
-	override fun onOptionsItemSelected(item: MenuItem): Boolean {
-		when (item.itemId) {
-			R.id.action_settings -> {
-				startActivity(SettingsActivity.newReaderSettingsIntent(this))
-			}
-
-			R.id.action_chapters -> {
-				ChaptersSheet.show(supportFragmentManager)
-			}
-
-			R.id.action_pages_thumbs -> {
-				val state = viewModel.getCurrentState() ?: return false
-				PagesThumbnailsSheet.show(
-					supportFragmentManager,
-					viewModel.manga?.toManga() ?: return false,
-					state.chapterId,
-					state.page,
-				)
-			}
-
-			R.id.action_bookmark -> {
-				if (viewModel.isBookmarkAdded.value) {
-					viewModel.removeBookmark()
-				} else {
-					viewModel.addBookmark()
-				}
-			}
-
-			R.id.action_options -> {
-				viewModel.saveCurrentState(readerManager.currentReader?.getCurrentState())
-				val currentMode = readerManager.currentMode ?: return false
-				ReaderConfigSheet.show(supportFragmentManager, currentMode)
-			}
-
-			else -> return super.onOptionsItemSelected(item)
-		}
-		return true
-	}
-
 	private fun onLoadingStateChanged(isLoading: Boolean) {
 		val hasPages = viewModel.content.value.pages.isNotEmpty()
 		viewBinding.layoutLoading.isVisible = isLoading && !hasPages
@@ -242,9 +197,7 @@ class ReaderActivity :
 		} else {
 			viewBinding.toastView.hide()
 		}
-		val menu = viewBinding.toolbarBottom.menu
-		menu.findItem(R.id.action_bookmark).isVisible = hasPages
-		menu.findItem(R.id.action_pages_thumbs).isVisible = hasPages
+		viewBinding.toolbarBottom.invalidateMenu()
 	}
 
 	override fun onGridTouch(area: Int) {
@@ -392,12 +345,6 @@ class ReaderActivity :
 		viewBinding.infoBar.isVisible = isBarEnabled && viewBinding.appbarTop.isGone
 	}
 
-	private fun onBookmarkStateChanged(isAdded: Boolean) {
-		val menuItem = viewBinding.toolbarBottom.menu.findItem(R.id.action_bookmark) ?: return
-		menuItem.setTitle(if (isAdded) R.string.bookmark_remove else R.string.bookmark_add)
-		menuItem.setIcon(if (isAdded) R.drawable.ic_bookmark_added else R.drawable.ic_bookmark)
-	}
-
 	private fun onUiStateChanged(pair: Pair<ReaderUiState?, ReaderUiState?>) {
 		val (previous: ReaderUiState?, uiState: ReaderUiState?) = pair
 		title = uiState?.resolveTitle(this) ?: getString(R.string.loading_)

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

@@ -0,0 +1,74 @@
+package org.koitharu.kotatsu.reader.ui
+
+import android.view.Menu
+import android.view.MenuInflater
+import android.view.MenuItem
+import androidx.core.view.MenuProvider
+import androidx.fragment.app.FragmentActivity
+import org.koitharu.kotatsu.R
+import org.koitharu.kotatsu.reader.ui.config.ReaderConfigSheet
+import org.koitharu.kotatsu.reader.ui.thumbnails.PagesThumbnailsSheet
+import org.koitharu.kotatsu.settings.SettingsActivity
+
+class ReaderBottomMenuProvider(
+	private val activity: FragmentActivity,
+	private val readerManager: ReaderManager,
+	private val viewModel: ReaderViewModel,
+) : MenuProvider {
+
+	override fun onCreateMenu(menu: Menu, menuInflater: MenuInflater) {
+		menuInflater.inflate(R.menu.opt_reader_bottom, menu)
+		onPrepareMenu(menu) // fix, not called in toolbar
+	}
+
+	override fun onPrepareMenu(menu: Menu) {
+		val hasPages = viewModel.content.value.pages.isNotEmpty()
+		menu.findItem(R.id.action_pages_thumbs).isVisible = hasPages
+
+		val bookmarkItem = menu.findItem(R.id.action_bookmark) ?: return
+		bookmarkItem.isVisible = hasPages
+		if (hasPages) {
+			val hasBookmark = viewModel.isBookmarkAdded.value
+			bookmarkItem.setTitle(if (hasBookmark) R.string.bookmark_remove else R.string.bookmark_add)
+			bookmarkItem.setIcon(if (hasBookmark) R.drawable.ic_bookmark_added else R.drawable.ic_bookmark)
+		}
+	}
+
+	override fun onMenuItemSelected(menuItem: MenuItem): Boolean {
+		return when (menuItem.itemId) {
+			R.id.action_settings -> {
+				activity.startActivity(SettingsActivity.newReaderSettingsIntent(activity))
+				true
+			}
+
+			R.id.action_pages_thumbs -> {
+				val state = viewModel.getCurrentState() ?: return false
+				PagesThumbnailsSheet.show(
+					activity.supportFragmentManager,
+					viewModel.manga?.toManga() ?: return false,
+					state.chapterId,
+					state.page,
+				)
+				true
+			}
+
+			R.id.action_bookmark -> {
+				if (viewModel.isBookmarkAdded.value) {
+					viewModel.removeBookmark()
+				} else {
+					viewModel.addBookmark()
+				}
+				true
+			}
+
+			R.id.action_options -> {
+				viewModel.saveCurrentState(readerManager.currentReader?.getCurrentState())
+				val currentMode = readerManager.currentMode ?: return false
+				ReaderConfigSheet.show(activity.supportFragmentManager, currentMode)
+				true
+			}
+
+			else -> false
+		}
+	}
+}

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

@@ -7,6 +7,7 @@ import org.koitharu.kotatsu.core.prefs.ReaderMode
 import org.koitharu.kotatsu.reader.ui.pager.BaseReaderFragment
 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.vertical.VerticalReaderFragment
 import org.koitharu.kotatsu.reader.ui.pager.webtoon.WebtoonReaderFragment
 import java.util.EnumMap
 
@@ -21,6 +22,7 @@ class ReaderManager(
 		modeMap[ReaderMode.STANDARD] = PagerReaderFragment::class.java
 		modeMap[ReaderMode.REVERSED] = ReversedReaderFragment::class.java
 		modeMap[ReaderMode.WEBTOON] = WebtoonReaderFragment::class.java
+		modeMap[ReaderMode.VERTICAL] = VerticalReaderFragment::class.java
 	}
 
 	val currentReader: BaseReaderFragment<*>?

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

@@ -0,0 +1,49 @@
+package org.koitharu.kotatsu.reader.ui
+
+import android.view.Menu
+import android.view.MenuInflater
+import android.view.MenuItem
+import androidx.core.view.MenuProvider
+import androidx.fragment.app.FragmentActivity
+import com.google.android.material.dialog.MaterialAlertDialogBuilder
+import org.koitharu.kotatsu.R
+import org.koitharu.kotatsu.core.util.ext.DIALOG_THEME_CENTERED
+
+class ReaderTopMenuProvider(
+	private val activity: FragmentActivity,
+	private val viewModel: ReaderViewModel,
+) : MenuProvider {
+
+	override fun onCreateMenu(menu: Menu, menuInflater: MenuInflater) {
+		menuInflater.inflate(R.menu.opt_reader_top, menu)
+	}
+
+	override fun onPrepareMenu(menu: Menu) {
+		menu.findItem(R.id.action_incognito)?.isVisible = viewModel.incognitoMode.value
+	}
+
+	override fun onMenuItemSelected(menuItem: MenuItem): Boolean {
+		return when (menuItem.itemId) {
+			R.id.action_chapters -> {
+				ChaptersSheet.show(activity.supportFragmentManager)
+				true
+			}
+
+			R.id.action_incognito -> {
+				showIncognitoModeDialog()
+				true
+			}
+
+			else -> false
+		}
+	}
+
+	private fun showIncognitoModeDialog() {
+		MaterialAlertDialogBuilder(activity, DIALOG_THEME_CENTERED)
+			.setIcon(R.drawable.ic_incognito)
+			.setTitle(R.string.incognito_mode)
+			.setMessage(R.string.incognito_mode_hint)
+			.setPositiveButton(R.string.got_it, null)
+			.show()
+	}
+}

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

@@ -51,6 +51,7 @@ import org.koitharu.kotatsu.history.data.PROGRESS_NONE
 import org.koitharu.kotatsu.history.domain.HistoryUpdateUseCase
 import org.koitharu.kotatsu.parsers.model.Manga
 import org.koitharu.kotatsu.parsers.model.MangaPage
+import org.koitharu.kotatsu.parsers.util.assertNotNull
 import org.koitharu.kotatsu.reader.domain.ChaptersLoader
 import org.koitharu.kotatsu.reader.domain.DetectReaderModeUseCase
 import org.koitharu.kotatsu.reader.domain.PageLoader
@@ -96,6 +97,12 @@ class ReaderViewModel @Inject constructor(
 	val onShowToast = MutableEventFlow<Int>()
 	val uiState = MutableStateFlow<ReaderUiState?>(null)
 
+	val incognitoMode = if (isIncognito) {
+		MutableStateFlow(true)
+	} else mangaFlow.map {
+		it != null && historyRepository.shouldSkip(it)
+	}.stateIn(viewModelScope + Dispatchers.Default, SharingStarted.Eagerly, false)
+
 	val content = MutableStateFlow(ReaderContent(emptyList(), null))
 	val manga: MangaDetails?
 		get() = mangaData.value
@@ -256,7 +263,7 @@ class ReaderViewModel @Inject constructor(
 	}
 
 	@MainThread
-	fun onCurrentPageChanged(position: Int) {
+	fun onCurrentPageChanged(lowerPos: Int, upperPos: Int) {
 		val prevJob = stateChangeJob
 		val pages = content.value.pages // capture immediately
 		stateChangeJob = launchJob(Dispatchers.Default) {
@@ -265,7 +272,8 @@ class ReaderViewModel @Inject constructor(
 			if (pages.size != content.value.pages.size) {
 				return@launchJob // TODO
 			}
-			pages.getOrNull(position)?.let { page ->
+			val centerPos = (lowerPos + upperPos) / 2
+			pages.getOrNull(centerPos)?.let { page ->
 				currentState.update { cs ->
 					cs?.copy(chapterId = page.chapterId, page = page.index)
 				}
@@ -275,14 +283,14 @@ class ReaderViewModel @Inject constructor(
 				return@launchJob
 			}
 			ensureActive()
-			if (position >= pages.lastIndex - BOUNDS_PAGE_OFFSET) {
+			if (upperPos >= pages.lastIndex - BOUNDS_PAGE_OFFSET) {
 				loadPrevNextChapter(pages.last().chapterId, isNext = true)
 			}
-			if (position <= BOUNDS_PAGE_OFFSET) {
+			if (lowerPos <= BOUNDS_PAGE_OFFSET) {
 				loadPrevNextChapter(pages.first().chapterId, isNext = false)
 			}
 			if (pageLoader.isPrefetchApplicable()) {
-				pageLoader.prefetch(pages.trySublist(position + 1, position + PREFETCH_LIMIT))
+				pageLoader.prefetch(pages.trySublist(upperPos + 1, upperPos + PREFETCH_LIMIT))
 			}
 		}
 	}
@@ -375,18 +383,20 @@ class ReaderViewModel @Inject constructor(
 
 	@WorkerThread
 	private fun notifyStateChanged() {
-		val state = getCurrentState()
-		val chapter = state?.chapterId?.let { chaptersLoader.peekChapter(it) }
+		val state = getCurrentState().assertNotNull("state") ?: return
+		val chapter = chaptersLoader.peekChapter(state.chapterId).assertNotNull("chapter") ?: return
+		val m = manga.assertNotNull("manga") ?: return
+		val chapterIndex = m.chapters[chapter.branch]?.indexOf(chapter) ?: -1
 		val newState = ReaderUiState(
-			mangaName = manga?.toManga()?.title,
-			branch = chapter?.branch,
-			chapterName = chapter?.name,
-			chapterNumber = chapter?.number ?: 0,
-			chaptersTotal = manga?.chapters?.get(chapter?.branch)?.size ?: 0,
-			totalPages = if (chapter != null) chaptersLoader.getPagesCount(chapter.id) else 0,
-			currentPage = state?.page ?: 0,
+			mangaName = m.toManga().title,
+			branch = chapter.branch,
+			chapterName = chapter.name,
+			chapterNumber = chapterIndex + 1,
+			chaptersTotal = m.chapters[chapter.branch]?.size ?: 0,
+			totalPages = chaptersLoader.getPagesCount(chapter.id),
+			currentPage = state.page,
 			isSliderEnabled = settings.isReaderSliderEnabled,
-			percent = if (state != null) computePercent(state.chapterId, state.page) else PROGRESS_NONE,
+			percent = computePercent(state.chapterId, state.page),
 		)
 		uiState.value = newState
 	}

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

@@ -79,6 +79,7 @@ class ReaderConfigSheet :
 		binding.buttonStandard.isChecked = mode == ReaderMode.STANDARD
 		binding.buttonReversed.isChecked = mode == ReaderMode.REVERSED
 		binding.buttonWebtoon.isChecked = mode == ReaderMode.WEBTOON
+		binding.buttonVertical.isChecked = mode == ReaderMode.VERTICAL
 
 		binding.checkableGroup.addOnButtonCheckedListener(this)
 		binding.buttonSavePage.setOnClickListener(this)
@@ -153,6 +154,7 @@ class ReaderConfigSheet :
 			R.id.button_standard -> ReaderMode.STANDARD
 			R.id.button_webtoon -> ReaderMode.WEBTOON
 			R.id.button_reversed -> ReaderMode.REVERSED
+			R.id.button_vertical -> ReaderMode.VERTICAL
 			else -> return
 		}
 		if (newMode == mode) {

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

@@ -0,0 +1,189 @@
+package org.koitharu.kotatsu.reader.ui.pager
+
+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 androidx.viewpager2.widget.ViewPager2
+import androidx.viewpager2.widget.ViewPager2.PageTransformer
+import com.google.android.material.snackbar.Snackbar
+import dagger.hilt.android.AndroidEntryPoint
+import kotlinx.coroutines.coroutineScope
+import kotlinx.coroutines.launch
+import kotlinx.coroutines.yield
+import org.koitharu.kotatsu.R
+import org.koitharu.kotatsu.core.os.NetworkState
+import org.koitharu.kotatsu.core.prefs.ReaderAnimation
+import org.koitharu.kotatsu.core.ui.list.lifecycle.PagerLifecycleDispatcher
+import org.koitharu.kotatsu.core.util.ext.doOnPageChanged
+import org.koitharu.kotatsu.core.util.ext.findCurrentViewHolder
+import org.koitharu.kotatsu.core.util.ext.observe
+import org.koitharu.kotatsu.core.util.ext.recyclerView
+import org.koitharu.kotatsu.core.util.ext.resetTransformations
+import org.koitharu.kotatsu.databinding.FragmentReaderPagerBinding
+import org.koitharu.kotatsu.reader.domain.PageLoader
+import org.koitharu.kotatsu.reader.ui.ReaderState
+import org.koitharu.kotatsu.reader.ui.pager.standard.NoAnimPageTransformer
+import org.koitharu.kotatsu.reader.ui.pager.standard.PageAnimTransformer
+import org.koitharu.kotatsu.reader.ui.pager.standard.PageHolder
+import org.koitharu.kotatsu.reader.ui.pager.standard.PagerEventSupplier
+import org.koitharu.kotatsu.reader.ui.pager.standard.PagesAdapter
+import javax.inject.Inject
+import kotlin.math.absoluteValue
+import kotlin.math.sign
+
+@AndroidEntryPoint
+abstract class BasePagerReaderFragment : BaseReaderFragment<FragmentReaderPagerBinding>(),
+	View.OnGenericMotionListener {
+
+	@Inject
+	lateinit var networkState: NetworkState
+
+	@Inject
+	lateinit var pageLoader: PageLoader
+
+	private var pagerLifecycleDispatcher: PagerLifecycleDispatcher? = null
+
+	override fun onCreateViewBinding(
+		inflater: LayoutInflater,
+		container: ViewGroup?,
+	) = FragmentReaderPagerBinding.inflate(inflater, container, false)
+
+	override fun onViewBindingCreated(
+		binding: FragmentReaderPagerBinding,
+		savedInstanceState: Bundle?,
+	) {
+		super.onViewBindingCreated(binding, savedInstanceState)
+		with(binding.pager) {
+			onInitPager(this)
+			doOnPageChanged(::notifyPageChanged)
+			setOnGenericMotionListener(this@BasePagerReaderFragment)
+			if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+				recyclerView?.defaultFocusHighlightEnabled = false
+			}
+			PagerEventSupplier(this).attach()
+			pagerLifecycleDispatcher = PagerLifecycleDispatcher(this).also {
+				registerOnPageChangeCallback(it)
+			}
+			adapter = readerAdapter
+		}
+
+		viewModel.pageAnimation.observe(viewLifecycleOwner) {
+			val transformer = when (it) {
+				ReaderAnimation.NONE -> NoAnimPageTransformer()
+				ReaderAnimation.DEFAULT -> null
+				ReaderAnimation.ADVANCED -> onCreateAdvancedTransformer()
+			}
+			binding.pager.setPageTransformer(transformer)
+			if (transformer == null) {
+				binding.pager.recyclerView?.children?.forEach { view ->
+					view.resetTransformations()
+				}
+			}
+		}
+	}
+
+	override fun onDestroyView() {
+		pagerLifecycleDispatcher = null
+		requireViewBinding().pager.adapter = null
+		super.onDestroyView()
+	}
+
+	override fun onZoomIn() {
+		(viewBinding?.pager?.findCurrentViewHolder() as? PageHolder)?.onZoomIn()
+	}
+
+	override fun onZoomOut() {
+		(viewBinding?.pager?.findCurrentViewHolder() as? PageHolder)?.onZoomOut()
+	}
+
+	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 suspend fun onPagesChanged(pages: List<ReaderPage>, pendingState: ReaderState?) = coroutineScope {
+		val items = launch {
+			requireAdapter().setItems(pages)
+			yield()
+			pagerLifecycleDispatcher?.invalidate()
+		}
+		if (pendingState != null) {
+			val position = pages.indexOfFirst {
+				it.chapterId == pendingState.chapterId && it.index == pendingState.page
+			}
+			items.join()
+			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.join()
+		}
+	}
+
+	override fun onCreateAdapter(): BaseReaderAdapter<*> = PagesAdapter(
+		lifecycleOwner = viewLifecycleOwner,
+		loader = pageLoader,
+		settings = viewModel.readerSettings,
+		networkState = networkState,
+		exceptionResolver = exceptionResolver,
+	)
+
+	override fun switchPageBy(delta: Int) {
+		with(requireViewBinding().pager) {
+			setCurrentItem(currentItem + delta, isAnimationEnabled())
+		}
+	}
+
+	override fun switchPageTo(position: Int, smooth: Boolean) {
+		with(requireViewBinding().pager) {
+			setCurrentItem(
+				position,
+				smooth && isAnimationEnabled() && (currentItem - position).absoluteValue < SMOOTH_SCROLL_LIMIT,
+			)
+		}
+	}
+
+	override fun getCurrentState(): ReaderState? = viewBinding?.run {
+		val adapter = pager.adapter as? BaseReaderAdapter<*>
+		val page = adapter?.getItemOrNull(pager.currentItem) ?: return@run null
+		ReaderState(
+			chapterId = page.chapterId,
+			page = page.index,
+			scroll = 0,
+		)
+	}
+
+	protected open fun onCreateAdvancedTransformer(): PageTransformer = PageAnimTransformer()
+
+	protected open fun onInitPager(pager: ViewPager2) {
+		pager.offscreenPageLimit = 2
+	}
+
+	protected open fun notifyPageChanged(page: Int) {
+		viewModel.onCurrentPageChanged(page, page)
+	}
+
+	companion object {
+
+		const val SMOOTH_SCROLL_LIMIT = 3
+	}
+}

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

@@ -1,109 +1,15 @@
 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
+import androidx.viewpager2.widget.ViewPager2
 import dagger.hilt.android.AndroidEntryPoint
-import kotlinx.coroutines.coroutineScope
-import kotlinx.coroutines.launch
-import kotlinx.coroutines.yield
-import org.koitharu.kotatsu.R
-import org.koitharu.kotatsu.core.os.NetworkState
-import org.koitharu.kotatsu.core.prefs.ReaderAnimation
-import org.koitharu.kotatsu.core.ui.list.lifecycle.PagerLifecycleDispatcher
-import org.koitharu.kotatsu.core.util.ext.doOnPageChanged
-import org.koitharu.kotatsu.core.util.ext.findCurrentViewHolder
-import org.koitharu.kotatsu.core.util.ext.observe
-import org.koitharu.kotatsu.core.util.ext.recyclerView
-import org.koitharu.kotatsu.core.util.ext.resetTransformations
-import org.koitharu.kotatsu.databinding.FragmentReaderStandardBinding
-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.BasePagerReaderFragment
 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.PageHolder
-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>(),
-	View.OnGenericMotionListener {
+class ReversedReaderFragment : BasePagerReaderFragment() {
 
-	@Inject
-	lateinit var networkState: NetworkState
-
-	@Inject
-	lateinit var pageLoader: PageLoader
-
-	private var pagerLifecycleDispatcher: PagerLifecycleDispatcher? = null
-
-	override fun onCreateViewBinding(
-		inflater: LayoutInflater,
-		container: ViewGroup?,
-	) = FragmentReaderStandardBinding.inflate(inflater, container, false)
-
-	override fun onViewBindingCreated(binding: FragmentReaderStandardBinding, savedInstanceState: Bundle?) {
-		super.onViewBindingCreated(binding, savedInstanceState)
-		with(binding.pager) {
-			adapter = readerAdapter
-			offscreenPageLimit = 2
-			doOnPageChanged(::notifyPageChanged)
-			setOnGenericMotionListener(this@ReversedReaderFragment)
-			if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
-				recyclerView?.defaultFocusHighlightEnabled = false
-			}
-			PagerEventSupplier(this).attach()
-			pagerLifecycleDispatcher = PagerLifecycleDispatcher(this).also {
-				registerOnPageChangeCallback(it)
-			}
-		}
-
-		viewModel.pageAnimation.observe(viewLifecycleOwner) {
-			val transformer = when (it) {
-				ReaderAnimation.NONE -> NoAnimPageTransformer()
-				ReaderAnimation.DEFAULT -> null
-				ReaderAnimation.ADVANCED -> ReversedPageAnimTransformer()
-			}
-			binding.pager.setPageTransformer(transformer)
-			if (transformer == null) {
-				binding.pager.recyclerView?.children?.forEach { v ->
-					v.resetTransformations()
-				}
-			}
-		}
-	}
-
-	override fun onDestroyView() {
-		pagerLifecycleDispatcher = null
-		requireViewBinding().pager.adapter = null
-		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 onCreateAdvancedTransformer(): ViewPager2.PageTransformer = ReversedPageAnimTransformer()
 
 	override fun onCreateAdapter() = ReversedPagesAdapter(
 		lifecycleOwner = viewLifecycleOwner,
@@ -113,66 +19,21 @@ class ReversedReaderFragment : BaseReaderFragment<FragmentReaderStandardBinding>
 		exceptionResolver = exceptionResolver,
 	)
 
-	override fun onZoomIn() {
-		(viewBinding?.pager?.findCurrentViewHolder() as? PageHolder)?.onZoomIn()
-	}
-
-	override fun onZoomOut() {
-		(viewBinding?.pager?.findCurrentViewHolder() as? PageHolder)?.onZoomOut()
-	}
-
-
 	override fun switchPageBy(delta: Int) {
-		with(requireViewBinding().pager) {
-			setCurrentItem(currentItem - delta, isAnimationEnabled())
-		}
+		super.switchPageBy(-delta)
 	}
 
 	override fun switchPageTo(position: Int, smooth: Boolean) {
-		with(requireViewBinding().pager) {
-			setCurrentItem(
-				reversed(position),
-				smooth && isAnimationEnabled() && (currentItem - position).absoluteValue < PagerReaderFragment.SMOOTH_SCROLL_LIMIT,
-			)
-		}
+		super.switchPageTo(reversed(position), smooth)
 	}
 
-	override suspend fun onPagesChanged(pages: List<ReaderPage>, pendingState: ReaderState?) = coroutineScope {
-		val reversedPages = pages.asReversed()
-		val items = launch {
-			requireAdapter().setItems(reversedPages)
-			yield()
-			pagerLifecycleDispatcher?.invalidate()
-		}
-		if (pendingState != null) {
-			val position = reversedPages.indexOfLast {
-				it.chapterId == pendingState.chapterId && it.index == pendingState.page
-			}
-			items.join()
-			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.join()
-		}
+	override suspend fun onPagesChanged(pages: List<ReaderPage>, pendingState: ReaderState?) {
+		super.onPagesChanged(pages.reversed(), pendingState)
 	}
 
-	override fun getCurrentState(): ReaderState? = viewBinding?.run {
-		val adapter = pager.adapter as? BaseReaderAdapter<*>
-		val page = adapter?.getItemOrNull(pager.currentItem) ?: return@run null
-		ReaderState(
-			chapterId = page.chapterId,
-			page = page.index,
-			scroll = 0,
-		)
-	}
-
-	private fun notifyPageChanged(page: Int) {
-		viewModel.onCurrentPageChanged(reversed(page))
+	override fun notifyPageChanged(page: Int) {
+		val pos = reversed(page)
+		viewModel.onCurrentPageChanged(pos, pos)
 	}
 
 	private fun reversed(position: Int): Int {

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

@@ -42,7 +42,6 @@ open class PageHolder(
 		bindingInfo.buttonRetry.setOnClickListener(this)
 		@Suppress("LeakingThis")
 		bindingInfo.buttonErrorDetails.setOnClickListener(this)
-		binding.textViewNumber.isVisible = settings.isPagesNumbersEnabled
 	}
 
 	override fun onResume() {
@@ -61,6 +60,7 @@ open class PageHolder(
 			delegate.reload()
 		}
 		binding.ssiv.applyDownsampling(isResumed())
+		binding.textViewNumber.isVisible = settings.isPagesNumbersEnabled
 	}
 
 	@SuppressLint("SetTextI18n")

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

@@ -1,180 +1,7 @@
 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
 import dagger.hilt.android.AndroidEntryPoint
-import kotlinx.coroutines.coroutineScope
-import kotlinx.coroutines.launch
-import kotlinx.coroutines.yield
-import org.koitharu.kotatsu.R
-import org.koitharu.kotatsu.core.os.NetworkState
-import org.koitharu.kotatsu.core.prefs.ReaderAnimation
-import org.koitharu.kotatsu.core.ui.list.lifecycle.PagerLifecycleDispatcher
-import org.koitharu.kotatsu.core.util.ext.doOnPageChanged
-import org.koitharu.kotatsu.core.util.ext.findCurrentViewHolder
-import org.koitharu.kotatsu.core.util.ext.observe
-import org.koitharu.kotatsu.core.util.ext.recyclerView
-import org.koitharu.kotatsu.core.util.ext.resetTransformations
-import org.koitharu.kotatsu.databinding.FragmentReaderStandardBinding
-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
-import kotlin.math.sign
+import org.koitharu.kotatsu.reader.ui.pager.BasePagerReaderFragment
 
 @AndroidEntryPoint
-class PagerReaderFragment : BaseReaderFragment<FragmentReaderStandardBinding>(),
-	View.OnGenericMotionListener {
-
-	@Inject
-	lateinit var networkState: NetworkState
-
-	@Inject
-	lateinit var pageLoader: PageLoader
-
-	private var pagerLifecycleDispatcher: PagerLifecycleDispatcher? = null
-
-	override fun onCreateViewBinding(
-		inflater: LayoutInflater,
-		container: ViewGroup?,
-	) = FragmentReaderStandardBinding.inflate(inflater, container, false)
-
-	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()
-			pagerLifecycleDispatcher = PagerLifecycleDispatcher(this).also {
-				registerOnPageChangeCallback(it)
-			}
-		}
-
-		viewModel.pageAnimation.observe(viewLifecycleOwner) {
-			val transformer = when (it) {
-				ReaderAnimation.NONE -> NoAnimPageTransformer()
-				ReaderAnimation.DEFAULT -> null
-				ReaderAnimation.ADVANCED -> PageAnimTransformer()
-			}
-			binding.pager.setPageTransformer(transformer)
-			if (transformer == null) {
-				binding.pager.recyclerView?.children?.forEach { view ->
-					view.resetTransformations()
-				}
-			}
-		}
-	}
-
-	override fun onDestroyView() {
-		pagerLifecycleDispatcher = null
-		requireViewBinding().pager.adapter = null
-		super.onDestroyView()
-	}
-
-	override fun onZoomIn() {
-		(viewBinding?.pager?.findCurrentViewHolder() as? PageHolder)?.onZoomIn()
-	}
-
-	override fun onZoomOut() {
-		(viewBinding?.pager?.findCurrentViewHolder() as? PageHolder)?.onZoomOut()
-	}
-
-	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 suspend fun onPagesChanged(pages: List<ReaderPage>, pendingState: ReaderState?) =
-		coroutineScope {
-			val items = launch {
-				requireAdapter().setItems(pages)
-				yield()
-				pagerLifecycleDispatcher?.invalidate()
-			}
-			if (pendingState != null) {
-				val position = pages.indexOfFirst {
-					it.chapterId == pendingState.chapterId && it.index == pendingState.page
-				}
-				items.join()
-				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.join()
-			}
-		}
-
-	override fun onCreateAdapter() = PagesAdapter(
-		lifecycleOwner = viewLifecycleOwner,
-		loader = pageLoader,
-		settings = viewModel.readerSettings,
-		networkState = networkState,
-		exceptionResolver = exceptionResolver,
-	)
-
-	override fun switchPageBy(delta: Int) {
-		with(requireViewBinding().pager) {
-			setCurrentItem(currentItem + delta, isAnimationEnabled())
-		}
-	}
-
-	override fun switchPageTo(position: Int, smooth: Boolean) {
-		with(requireViewBinding().pager) {
-			setCurrentItem(
-				position,
-				smooth && isAnimationEnabled() && (currentItem - position).absoluteValue < SMOOTH_SCROLL_LIMIT,
-			)
-		}
-	}
-
-	override fun getCurrentState(): ReaderState? = viewBinding?.run {
-		val adapter = pager.adapter as? BaseReaderAdapter<*>
-		val page = adapter?.getItemOrNull(pager.currentItem) ?: return@run null
-		ReaderState(
-			chapterId = page.chapterId,
-			page = page.index,
-			scroll = 0,
-		)
-	}
-
-	private fun notifyPageChanged(page: Int) {
-		viewModel.onCurrentPageChanged(page)
-	}
-
-	companion object {
-
-		const val SMOOTH_SCROLL_LIMIT = 3
-	}
-}
+class PagerReaderFragment : BasePagerReaderFragment()

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

@@ -0,0 +1,31 @@
+package org.koitharu.kotatsu.reader.ui.pager.vertical
+
+import android.view.View
+import androidx.viewpager2.widget.ViewPager2
+
+class VerticalPageAnimTransformer : ViewPager2.PageTransformer {
+
+	override fun transformPage(page: View, position: Float) = with(page) {
+		translationY = -position * height
+		pivotX = width / 2f
+		pivotY = height * 0.2f
+		cameraDistance = 20000f
+		when {
+			position < -1f || position > 1f -> {
+				alpha = 0f
+				rotationX = 0f
+				translationZ = -1f
+			}
+			position > 0f -> {
+				alpha = 1f
+				rotationX = 0f
+				translationZ = 0f
+			}
+			position <= 0f -> {
+				alpha = 1f
+				rotationX = -120 * position
+				translationZ = 2f
+			}
+		}
+	}
+}

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

@@ -0,0 +1,16 @@
+package org.koitharu.kotatsu.reader.ui.pager.vertical
+
+import androidx.viewpager2.widget.ViewPager2
+import dagger.hilt.android.AndroidEntryPoint
+import org.koitharu.kotatsu.reader.ui.pager.BasePagerReaderFragment
+
+@AndroidEntryPoint
+class VerticalReaderFragment : BasePagerReaderFragment() {
+
+	override fun onInitPager(pager: ViewPager2) {
+		super.onInitPager(pager)
+		pager.orientation = ViewPager2.ORIENTATION_VERTICAL
+	}
+
+	override fun onCreateAdvancedTransformer(): ViewPager2.PageTransformer = VerticalPageAnimTransformer()
+}

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

@@ -24,7 +24,8 @@ import org.koitharu.kotatsu.reader.ui.pager.ReaderPage
 import javax.inject.Inject
 
 @AndroidEntryPoint
-class WebtoonReaderFragment : BaseReaderFragment<FragmentReaderWebtoonBinding>() {
+class WebtoonReaderFragment : BaseReaderFragment<FragmentReaderWebtoonBinding>(),
+	WebtoonRecyclerView.OnWebtoonScrollListener {
 
 	@Inject
 	lateinit var networkState: NetworkState
@@ -46,7 +47,7 @@ class WebtoonReaderFragment : BaseReaderFragment<FragmentReaderWebtoonBinding>()
 		with(binding.recyclerView) {
 			setHasFixedSize(true)
 			adapter = readerAdapter
-			addOnPageScrollListener(PageScrollListener())
+			addOnPageScrollListener(this@WebtoonReaderFragment)
 			recyclerLifecycleDispatcher = RecyclerViewLifecycleDispatcher().also {
 				addOnScrollListener(it)
 			}
@@ -70,6 +71,15 @@ class WebtoonReaderFragment : BaseReaderFragment<FragmentReaderWebtoonBinding>()
 		exceptionResolver = exceptionResolver,
 	)
 
+	override fun onScrollChanged(
+		recyclerView: WebtoonRecyclerView,
+		dy: Int,
+		firstVisiblePosition: Int,
+		lastVisiblePosition: Int,
+	) {
+		viewModel.onCurrentPageChanged(firstVisiblePosition, lastVisiblePosition)
+	}
+
 	override suspend fun onPagesChanged(pages: List<ReaderPage>, pendingState: ReaderState?) = coroutineScope {
 		val setItems = launch {
 			requireAdapter().setItems(pages)
@@ -91,7 +101,7 @@ class WebtoonReaderFragment : BaseReaderFragment<FragmentReaderWebtoonBinding>()
 							?.restoreScroll(pendingState.scroll)
 					}
 				}
-				notifyPageChanged(position)
+				viewModel.onCurrentPageChanged(position, position)
 			} else {
 				Snackbar.make(requireView(), R.string.not_found_404, Snackbar.LENGTH_SHORT)
 					.show()
@@ -121,10 +131,6 @@ class WebtoonReaderFragment : BaseReaderFragment<FragmentReaderWebtoonBinding>()
 		viewBinding?.frame?.onZoomOut()
 	}
 
-	private fun notifyPageChanged(page: Int) {
-		viewModel.onCurrentPageChanged(page)
-	}
-
 	override fun switchPageBy(delta: Int) {
 		with(requireViewBinding().recyclerView) {
 			if (isAnimationEnabled()) {
@@ -147,12 +153,4 @@ class WebtoonReaderFragment : BaseReaderFragment<FragmentReaderWebtoonBinding>()
 		}
 		return true
 	}
-
-	private inner class PageScrollListener : WebtoonRecyclerView.OnPageScrollListener() {
-
-		override fun onPageChanged(recyclerView: WebtoonRecyclerView, index: Int) {
-			super.onPageChanged(recyclerView, index)
-			notifyPageChanged(index)
-		}
-	}
 }

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

@@ -6,8 +6,8 @@ import android.view.View
 import androidx.core.view.ViewCompat.TYPE_TOUCH
 import androidx.core.view.forEach
 import androidx.core.view.iterator
+import androidx.recyclerview.widget.LinearLayoutManager
 import androidx.recyclerview.widget.RecyclerView
-import org.koitharu.kotatsu.core.util.ext.findCenterViewPosition
 import java.util.LinkedList
 import java.util.WeakHashMap
 
@@ -15,7 +15,8 @@ class WebtoonRecyclerView @JvmOverloads constructor(
 	context: Context, attrs: AttributeSet? = null, defStyleAttr: Int = 0
 ) : RecyclerView(context, attrs, defStyleAttr) {
 
-	private var onPageScrollListeners: MutableList<OnPageScrollListener>? = null
+	private var onPageScrollListeners = LinkedList<OnWebtoonScrollListener>()
+	private val scrollDispatcher = WebtoonScrollDispatcher()
 	private val detachedViews = WeakHashMap<View, Unit>()
 	private var isFixingScroll: Boolean = false
 
@@ -103,22 +104,20 @@ class WebtoonRecyclerView @JvmOverloads constructor(
 		return 0
 	}
 
-	fun addOnPageScrollListener(listener: OnPageScrollListener) {
-		val list = onPageScrollListeners ?: LinkedList<OnPageScrollListener>().also { onPageScrollListeners = it }
-		list.add(listener)
+	fun addOnPageScrollListener(listener: OnWebtoonScrollListener) {
+		onPageScrollListeners.add(listener)
 	}
 
-	fun removeOnPageScrollListener(listener: OnPageScrollListener) {
-		onPageScrollListeners?.remove(listener)
+	fun removeOnPageScrollListener(listener: OnWebtoonScrollListener) {
+		onPageScrollListeners.remove(listener)
 	}
 
 	private fun notifyScrollChanged(dy: Int) {
 		val listeners = onPageScrollListeners
-		if (listeners.isNullOrEmpty()) {
+		if (listeners.isEmpty()) {
 			return
 		}
-		val centerPosition = findCenterViewPosition()
-		listeners.forEach { it.dispatchScroll(this, dy, centerPosition) }
+		scrollDispatcher.dispatchScroll(this, dy)
 	}
 
 	fun relayoutChildren() {
@@ -162,20 +161,30 @@ class WebtoonRecyclerView @JvmOverloads constructor(
 		else -> false
 	}
 
-	abstract class OnPageScrollListener {
+	private class WebtoonScrollDispatcher {
 
-		private var lastPosition = NO_POSITION
+		private var firstPos = NO_POSITION
+		private var lastPos = NO_POSITION
 
-		fun dispatchScroll(recyclerView: WebtoonRecyclerView, dy: Int, centerPosition: Int) {
-			onScroll(recyclerView, dy)
-			if (centerPosition != NO_POSITION && centerPosition != lastPosition) {
-				lastPosition = centerPosition
-				onPageChanged(recyclerView, centerPosition)
+		fun dispatchScroll(rv: WebtoonRecyclerView, dy: Int) {
+			val lm = rv.layoutManager as? LinearLayoutManager
+			if (lm == null) {
+				firstPos = NO_POSITION
+				lastPos = NO_POSITION
+				return
+			}
+			val newFirstPos = lm.findFirstVisibleItemPosition()
+			val newLastPos = lm.findLastVisibleItemPosition()
+			if (newFirstPos != firstPos || newLastPos != lastPos) {
+				firstPos = newFirstPos
+				lastPos = newLastPos
+				rv.onPageScrollListeners.forEach { it.onScrollChanged(rv, dy, newFirstPos, newLastPos) }
 			}
 		}
+	}
 
-		open fun onScroll(recyclerView: WebtoonRecyclerView, dy: Int) = Unit
+	interface OnWebtoonScrollListener {
 
-		open fun onPageChanged(recyclerView: WebtoonRecyclerView, index: Int) = Unit
+		fun onScrollChanged(recyclerView: WebtoonRecyclerView, dy: Int, firstVisiblePosition: Int, lastVisiblePosition: Int)
 	}
 }

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.model.ListHeader
 import org.koitharu.kotatsu.list.ui.model.ListModel
 import org.koitharu.kotatsu.reader.ui.thumbnails.PageThumbnail
 
@@ -24,13 +23,6 @@ class PageThumbnailAdapter(
 	}
 
 	override fun getSectionText(context: Context, position: Int): CharSequence? {
-		val list = items
-		for (i in (0..position).reversed()) {
-			val item = list.getOrNull(i) ?: continue
-			if (item is ListHeader) {
-				return item.getText(context)
-			}
-		}
-		return null
+		return findHeader(position)?.getText(context)
 	}
 }

app/src/main/kotlin/org/koitharu/kotatsu/remotelist/ui/RemoteListFragment.kt

@@ -111,6 +111,7 @@ class RemoteListFragment : MangaListFragment(), FilterOwner {
 
 		override fun onPrepareMenu(menu: Menu) {
 			super.onPrepareMenu(menu)
+			menu.findItem(R.id.action_search)?.isVisible = viewModel.isSearchAvailable
 			menu.findItem(R.id.action_random)?.isEnabled = !viewModel.isRandomLoading.value
 			menu.findItem(R.id.action_filter_reset)?.isVisible = viewModel.header.value.isFilterApplied
 		}

app/src/main/kotlin/org/koitharu/kotatsu/remotelist/ui/RemoteListViewModel.kt

@@ -68,6 +68,9 @@ open class RemoteListViewModel @Inject constructor(
 	private var loadingJob: Job? = null
 	private var randomJob: Job? = null
 
+	val isSearchAvailable: Boolean
+		get() = repository.isSearchSupported
+
 	override val content = combine(
 		mangaList.map { it?.distinctById()?.skipNsfwIfNeeded() },
 		listMode,

app/src/main/kotlin/org/koitharu/kotatsu/scrobbling/common/domain/Scrobbler.kt

@@ -1,5 +1,6 @@
 package org.koitharu.kotatsu.scrobbling.common.domain
 
+import androidx.annotation.FloatRange
 import androidx.collection.LongSparseArray
 import androidx.collection.getOrElse
 import androidx.core.text.parseAsHtml
@@ -11,9 +12,11 @@ import kotlinx.coroutines.flow.flow
 import kotlinx.coroutines.flow.map
 import org.koitharu.kotatsu.core.db.MangaDatabase
 import org.koitharu.kotatsu.core.util.ext.findKeyByValue
+import org.koitharu.kotatsu.core.util.ext.printStackTraceDebug
 import org.koitharu.kotatsu.core.util.ext.sanitize
 import org.koitharu.kotatsu.parsers.model.MangaChapter
 import org.koitharu.kotatsu.parsers.util.runCatchingCancellable
+import org.koitharu.kotatsu.scrobbling.common.data.ScrobblerRepository
 import org.koitharu.kotatsu.scrobbling.common.data.ScrobblingEntity
 import org.koitharu.kotatsu.scrobbling.common.domain.model.ScrobblerManga
 import org.koitharu.kotatsu.scrobbling.common.domain.model.ScrobblerMangaInfo
@@ -21,13 +24,12 @@ import org.koitharu.kotatsu.scrobbling.common.domain.model.ScrobblerService
 import org.koitharu.kotatsu.scrobbling.common.domain.model.ScrobblerUser
 import org.koitharu.kotatsu.scrobbling.common.domain.model.ScrobblingInfo
 import org.koitharu.kotatsu.scrobbling.common.domain.model.ScrobblingStatus
-import org.koitharu.kotatsu.core.util.ext.printStackTraceDebug
 import java.util.EnumMap
 
 abstract class Scrobbler(
 	protected val db: MangaDatabase,
 	val scrobblerService: ScrobblerService,
-	private val repository: org.koitharu.kotatsu.scrobbling.common.data.ScrobblerRepository,
+	private val repository: ScrobblerRepository,
 ) {
 
 	private val infoCache = LongSparseArray<ScrobblerMangaInfo>()
@@ -76,7 +78,12 @@ abstract class Scrobbler(
 		return entity.toScrobblingInfo()
 	}
 
-	abstract suspend fun updateScrobblingInfo(mangaId: Long, rating: Float, status: ScrobblingStatus?, comment: String?)
+	abstract suspend fun updateScrobblingInfo(
+		mangaId: Long,
+		@FloatRange(from = 0.0, to = 1.0) rating: Float,
+		status: ScrobblingStatus?,
+		comment: String?,
+	)
 
 	fun observeScrobblingInfo(mangaId: Long): Flow<ScrobblingInfo?> {
 		return db.getScrobblingDao().observe(scrobblerService.id, mangaId)

app/src/main/kotlin/org/koitharu/kotatsu/scrobbling/common/ui/selector/ScrobblingSelectorSheet.kt

@@ -23,6 +23,8 @@ import org.koitharu.kotatsu.core.util.ext.firstVisibleItemPosition
 import org.koitharu.kotatsu.core.util.ext.getDisplayMessage
 import org.koitharu.kotatsu.core.util.ext.observe
 import org.koitharu.kotatsu.core.util.ext.observeEvent
+import org.koitharu.kotatsu.core.util.ext.setProgressIcon
+import org.koitharu.kotatsu.core.util.ext.setTabsEnabled
 import org.koitharu.kotatsu.core.util.ext.withArgs
 import org.koitharu.kotatsu.databinding.SheetScrobblingSelectorBinding
 import org.koitharu.kotatsu.list.ui.adapter.ListStateHolderListener
@@ -80,6 +82,15 @@ class ScrobblingSelectorSheet :
 		viewModel.onClose.observeEvent(viewLifecycleOwner) {
 			dismiss()
 		}
+		viewModel.isLoading.observe(viewLifecycleOwner) { isLoading ->
+			binding.buttonDone.isEnabled = !isLoading
+			if (isLoading) {
+				binding.buttonDone.setProgressIcon()
+			} else {
+				binding.buttonDone.icon = null
+			}
+			binding.tabs.setTabsEnabled(!isLoading)
+		}
 		viewModel.selectedScrobblerIndex.observe(viewLifecycleOwner) { index ->
 			val tab = binding.tabs.getTabAt(index)
 			if (tab != null && !tab.isSelected) {
@@ -100,7 +111,7 @@ class ScrobblingSelectorSheet :
 	}
 
 	override fun onItemClick(item: ScrobblerManga, view: View) {
-		viewModel.selectedItemId.value = item.id
+		viewModel.selectItem(item.id)
 	}
 
 	override fun onRetryClick(error: Throwable) {

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

@@ -14,20 +14,24 @@ import kotlinx.coroutines.flow.map
 import kotlinx.coroutines.flow.stateIn
 import kotlinx.coroutines.plus
 import org.koitharu.kotatsu.R
+import org.koitharu.kotatsu.core.model.findById
 import org.koitharu.kotatsu.core.model.parcelable.ParcelableManga
 import org.koitharu.kotatsu.core.parser.MangaIntent
+import org.koitharu.kotatsu.core.parser.MangaRepository
 import org.koitharu.kotatsu.core.ui.BaseViewModel
 import org.koitharu.kotatsu.core.util.ext.MutableEventFlow
 import org.koitharu.kotatsu.core.util.ext.call
 import org.koitharu.kotatsu.core.util.ext.printStackTraceDebug
 import org.koitharu.kotatsu.core.util.ext.require
 import org.koitharu.kotatsu.core.util.ext.requireValue
+import org.koitharu.kotatsu.history.data.HistoryRepository
 import org.koitharu.kotatsu.list.ui.model.ListModel
 import org.koitharu.kotatsu.list.ui.model.LoadingFooter
 import org.koitharu.kotatsu.list.ui.model.LoadingState
 import org.koitharu.kotatsu.parsers.util.runCatchingCancellable
 import org.koitharu.kotatsu.scrobbling.common.domain.Scrobbler
 import org.koitharu.kotatsu.scrobbling.common.domain.model.ScrobblerManga
+import org.koitharu.kotatsu.scrobbling.common.domain.model.ScrobblingStatus
 import org.koitharu.kotatsu.scrobbling.common.ui.selector.model.ScrobblerHint
 import javax.inject.Inject
 
@@ -35,6 +39,8 @@ import javax.inject.Inject
 class ScrobblingSelectorViewModel @Inject constructor(
 	savedStateHandle: SavedStateHandle,
 	scrobblers: Set<@JvmSuppressWildcards Scrobbler>,
+	private val historyRepository: HistoryRepository,
+	private val mangaRepositoryFactory: MangaRepository.Factory,
 ) : BaseViewModel() {
 
 	val manga = savedStateHandle.require<ParcelableManga>(MangaIntent.KEY_MANGA).manga
@@ -92,6 +98,13 @@ class ScrobblingSelectorViewModel @Inject constructor(
 		loadList(append = false)
 	}
 
+	fun selectItem(id: Long) {
+		if (doneJob?.isActive == true) {
+			return
+		}
+		selectedItemId.value = id
+	}
+
 	fun loadNextPage() {
 		if (scrobblerMangaList.value.isNotEmpty() && hasNextPage.value) {
 			loadList(append = true)
@@ -109,7 +122,7 @@ class ScrobblingSelectorViewModel @Inject constructor(
 		if (loadingJob?.isActive == true) {
 			return
 		}
-		loadingJob = launchLoadingJob(Dispatchers.Default) {
+		loadingJob = launchJob(Dispatchers.Default) {
 			listError.value = null
 			val offset = if (append) scrobblerMangaList.value.size else 0
 			runCatchingCancellable {
@@ -136,8 +149,31 @@ class ScrobblingSelectorViewModel @Inject constructor(
 		if (targetId == NO_ID) {
 			onClose.call(Unit)
 		}
-		doneJob = launchJob(Dispatchers.Default) {
+		doneJob = launchLoadingJob(Dispatchers.Default) {
+			val prevInfo = currentScrobbler.getScrobblingInfoOrNull(manga.id)
 			currentScrobbler.linkManga(manga.id, targetId)
+			val history = historyRepository.getOne(manga)
+			currentScrobbler.updateScrobblingInfo(
+				mangaId = manga.id,
+				rating = prevInfo?.rating ?: manga.rating,
+				status = prevInfo?.status ?: if (history == null) {
+					ScrobblingStatus.PLANNED
+				} else {
+					ScrobblingStatus.READING
+				},
+				comment = prevInfo?.comment,
+			)
+			if (history != null) {
+				val chapter = mangaRepositoryFactory.create(manga.source)
+					.getDetails(manga)
+					.chapters?.findById(history.chapterId)
+				if (chapter != null) {
+					currentScrobbler.scrobble(
+						mangaId = manga.id,
+						chapter = chapter,
+					)
+				}
+			}
 			onClose.call(Unit)
 		}
 	}

app/src/main/kotlin/org/koitharu/kotatsu/search/ui/MangaListActivity.kt

@@ -118,7 +118,7 @@ class MangaListActivity :
 			fm.commit {
 				setReorderingAllowed(true)
 				val fragment = if (source == MangaSource.LOCAL) {
-					LocalListFragment.newInstance()
+					LocalListFragment()
 				} else {
 					RemoteListFragment.newInstance(source)
 				}

app/src/main/kotlin/org/koitharu/kotatsu/search/ui/multi/MultiSearchViewModel.kt

@@ -113,10 +113,14 @@ class MultiSearchViewModel @Inject constructor(
 		}
 		val semaphore = Semaphore(MAX_PARALLELISM)
 		for (source in sources) {
+			val repository = mangaRepositoryFactory.create(source)
+			if (!repository.isSearchSupported) {
+				continue
+			}
 			launch {
 				val item = runCatchingCancellable {
 					semaphore.withPermit {
-						mangaRepositoryFactory.create(source).getList(offset = 0, filter = MangaListFilter.Search(q))
+						repository.getList(offset = 0, filter = MangaListFilter.Search(q))
 							.toUi(ListMode.GRID, extraProvider)
 					}
 				}.fold(

app/src/main/kotlin/org/koitharu/kotatsu/search/ui/suggestion/SearchSuggestionMenuProvider.kt

@@ -8,6 +8,7 @@ import androidx.activity.result.ActivityResultLauncher
 import androidx.core.view.MenuProvider
 import com.google.android.material.dialog.MaterialAlertDialogBuilder
 import org.koitharu.kotatsu.R
+import org.koitharu.kotatsu.core.util.ext.DIALOG_THEME_CENTERED
 import org.koitharu.kotatsu.core.util.ext.resolve
 import org.koitharu.kotatsu.core.util.ext.tryLaunch
 import com.google.android.material.R as materialR
@@ -43,7 +44,7 @@ class SearchSuggestionMenuProvider(
 	}
 
 	private fun clearSearchHistory() {
-		MaterialAlertDialogBuilder(context, materialR.style.ThemeOverlay_Material3_MaterialAlertDialog_Centered)
+		MaterialAlertDialogBuilder(context, DIALOG_THEME_CENTERED)
 			.setTitle(R.string.clear_search_history)
 			.setIcon(R.drawable.ic_clear_all)
 			.setMessage(R.string.text_clear_search_history_prompt)

app/src/main/kotlin/org/koitharu/kotatsu/settings/about/AppUpdateDialog.kt

@@ -16,7 +16,8 @@ import io.noties.markwon.Markwon
 import org.koitharu.kotatsu.R
 import org.koitharu.kotatsu.core.github.AppVersion
 import org.koitharu.kotatsu.core.util.FileSize
-import com.google.android.material.R as materialR
+import org.koitharu.kotatsu.core.util.ext.DIALOG_THEME_CENTERED
+import org.koitharu.kotatsu.core.util.ext.getDisplayMessage
 
 class AppUpdateDialog(private val activity: AppCompatActivity) {
 
@@ -42,10 +43,7 @@ class AppUpdateDialog(private val activity: AppCompatActivity) {
 			appendLine()
 			append(Markwon.create(activity).toMarkdown(version.description))
 		}
-		MaterialAlertDialogBuilder(
-			activity,
-			materialR.style.ThemeOverlay_Material3_MaterialAlertDialog_Centered,
-		)
+		MaterialAlertDialogBuilder(activity, DIALOG_THEME_CENTERED)
 			.setTitle(R.string.app_update_available)
 			.setMessage(message)
 			.setIcon(R.drawable.ic_app_update)
@@ -68,7 +66,7 @@ class AppUpdateDialog(private val activity: AppCompatActivity) {
 		}
 	}
 
-	private fun downloadUpdateImpl() {
+	private fun downloadUpdateImpl() = runCatching {
 		val version = latestVersion
 		val url = version.apkUrl.toUri()
 		val dm = activity.getSystemService(Context.DOWNLOAD_SERVICE) as DownloadManager
@@ -78,7 +76,10 @@ class AppUpdateDialog(private val activity: AppCompatActivity) {
 			.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED)
 			.setMimeType("application/vnd.android.package-archive")
 		dm.enqueue(request)
+	}.onSuccess {
 		Toast.makeText(activity, R.string.download_started, Toast.LENGTH_SHORT).show()
+	}.onFailure { e ->
+		Toast.makeText(activity, e.getDisplayMessage(activity.resources), Toast.LENGTH_SHORT).show()
 	}
 
 	private fun openInBrowser() {

app/src/main/kotlin/org/koitharu/kotatsu/suggestions/ui/SuggestionsWorker.kt

@@ -352,7 +352,7 @@ class SuggestionsWorker @AssistedInject constructor(
 			val request = PeriodicWorkRequestBuilder<SuggestionsWorker>(6, TimeUnit.HOURS)
 				.setConstraints(createConstraints())
 				.addTag(TAG)
-				.setBackoffCriteria(BackoffPolicy.LINEAR, 30, TimeUnit.MINUTES)
+				.setBackoffCriteria(BackoffPolicy.LINEAR, 1, TimeUnit.HOURS)
 				.build()
 			workManager
 				.enqueueUniquePeriodicWork(TAG, ExistingPeriodicWorkPolicy.UPDATE, request)

app/src/main/kotlin/org/koitharu/kotatsu/tracker/ui/feed/adapter/FeedAdapter.kt

@@ -13,7 +13,6 @@ import org.koitharu.kotatsu.list.ui.adapter.errorStateListAD
 import org.koitharu.kotatsu.list.ui.adapter.listHeaderAD
 import org.koitharu.kotatsu.list.ui.adapter.loadingFooterAD
 import org.koitharu.kotatsu.list.ui.adapter.loadingStateAD
-import org.koitharu.kotatsu.list.ui.model.ListHeader
 import org.koitharu.kotatsu.list.ui.model.ListModel
 import org.koitharu.kotatsu.list.ui.size.ItemSizeResolver
 
@@ -45,13 +44,6 @@ class FeedAdapter(
 	}
 
 	override fun getSectionText(context: Context, position: Int): CharSequence? {
-		val list = items
-		for (i in (0..position).reversed()) {
-			val item = list.getOrNull(i) ?: continue
-			if (item is ListHeader) {
-				return item.getText(context)
-			}
-		}
-		return null
+		return findHeader(position)?.getText(context)
 	}
 }

app/src/main/kotlin/org/koitharu/kotatsu/tracker/work/TrackWorker.kt

@@ -323,7 +323,7 @@ class TrackWorker @AssistedInject constructor(
 			val request = PeriodicWorkRequestBuilder<TrackWorker>(4, TimeUnit.HOURS)
 				.setConstraints(constraints)
 				.addTag(TAG)
-				.setBackoffCriteria(BackoffPolicy.LINEAR, 5, TimeUnit.MINUTES)
+				.setBackoffCriteria(BackoffPolicy.LINEAR, 30, TimeUnit.MINUTES)
 				.build()
 			workManager
 				.enqueueUniquePeriodicWork(TAG, ExistingPeriodicWorkPolicy.UPDATE, request)
@@ -373,7 +373,7 @@ class TrackWorker @AssistedInject constructor(
 		const val TAG = "tracking"
 		const val TAG_ONESHOT = "tracking_oneshot"
 		const val MAX_PARALLELISM = 3
-		const val MAX_ATTEMPTS = 4
+		const val MAX_ATTEMPTS = 3
 		const val DATA_KEY_SUCCESS = "success"
 		const val DATA_KEY_FAILED = "failed"
 		const val KEY_RETRY_IDS = "retry"

app/src/main/res/drawable-v23/tabs_background.xml

@@ -4,7 +4,7 @@
 	<item>
 		<shape
 			android:shape="rectangle">
-			<solid android:color="?attr/colorOutline"/>
+			<solid android:color="?attr/colorSurfaceVariant"/>
 		</shape>
 	</item>
 	<!-- ..., then draws a rectangle with the container color to cover the area not for the divider. -->