Translated using Weblate (Polish)

Currently translated at 100.0% (636 of 636 strings)

Co-authored-by: maryush <maryush@gmail.com>
Translate-URL: https://hosted.weblate.org/projects/kotatsu/strings/pl/
Translation: Kotatsu/Strings

.gitignore

@@ -10,6 +10,7 @@
 /.idea/compiler.xml
 /.idea/workspace.xml
 /.idea/navEditor.xml
+/.idea/ktlint-plugin.xml
 /.idea/assetWizardSettings.xml
 /.idea/kotlinScripting.xml
 /.idea/kotlinc.xml

.idea/gradle.xml

@@ -4,9 +4,8 @@
   <component name="GradleSettings">
     <option name="linkedExternalProjectsSettings">
       <GradleProjectSettings>
-        <option name="testRunner" value="GRADLE" />
         <option name="externalProjectPath" value="$PROJECT_DIR$" />
-        <option name="gradleJvm" value="jbr-17" />
+        <option name="gradleJvm" value="#GRADLE_LOCAL_JAVA_HOME" />
         <option name="modules">
           <set>
             <option value="$PROJECT_DIR$" />

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.

LICENSE

@@ -619,56 +619,3 @@ Program, unless a warranty or assumption of liability accompanies a
 copy of the Program in return for a fee.
 
                      END OF TERMS AND CONDITIONS
-
-            How to Apply These Terms to Your New Programs
-
-  If you develop a new program, and you want it to be of the greatest
-possible use to the public, the best way to achieve this is to make it
-free software which everyone can redistribute and change under these terms.
-
-  To do so, attach the following notices to the program.  It is safest
-to attach them to the start of each source file to most effectively
-state the exclusion of warranty; and each file should have at least
-the "copyright" line and a pointer to where the full notice is found.
-
-    <one line to give the program's name and a brief idea of what it does.>
-    Copyright (C) <year>  <name of author>
-
-    This program is free software: you can redistribute it and/or modify
-    it under the terms of the GNU General Public License as published by
-    the Free Software Foundation, either version 3 of the License, or
-    (at your option) any later version.
-
-    This program is distributed in the hope that it will be useful,
-    but WITHOUT ANY WARRANTY; without even the implied warranty of
-    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-    GNU General Public License for more details.
-
-    You should have received a copy of the GNU General Public License
-    along with this program.  If not, see <https://www.gnu.org/licenses/>.
-
-Also add information on how to contact you by electronic and paper mail.
-
-  If the program does terminal interaction, make it output a short
-notice like this when it starts in an interactive mode:
-
-    <program>  Copyright (C) <year>  <name of author>
-    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
-    This is free software, and you are welcome to redistribute it
-    under certain conditions; type `show c' for details.
-
-The hypothetical commands `show w' and `show c' should show the appropriate
-parts of the General Public License.  Of course, your program's commands
-might be different; for a GUI interface, you would use an "about box".
-
-  You should also get your employer (if you work as a programmer) or school,
-if any, to sign a "copyright disclaimer" for the program, if necessary.
-For more information on this, and how to apply and follow the GNU GPL, see
-<https://www.gnu.org/licenses/>.
-
-  The GNU General Public License does not permit incorporating your program
-into proprietary programs.  If your program is a subroutine library, you
-may consider it more useful to permit linking proprietary applications with
-the library.  If this is what you want to do, use the GNU Lesser General
-Public License instead of this License.  But first, please read
-<https://www.gnu.org/licenses/why-not-lgpl.html>.

README.md

@@ -19,7 +19,7 @@ Kotatsu is a free and open source manga reader for Android.
 * Tablet-optimized Material You UI
 * Standard and Webtoon-optimized reader
 * Notifications about new chapters with updates feed
-* Integration with manga tracking services: Shikimori, AniList, MyAnimeList
+* Integration with manga tracking services: Shikimori, AniList, MyAnimeList, Kitsu
 * Password/fingerprint protect access to the app
 * History and favourites [synchronization](https://github.com/KotatsuApp/kotatsu-syncserver) across devices
 

app/build.gradle

@@ -16,8 +16,8 @@ android {
 		applicationId 'org.koitharu.kotatsu'
 		minSdk = 21
 		targetSdk = 34
-		versionCode = 607
-		versionName = '6.5.1'
+		versionCode = 631
+		versionName = '6.8.1'
 		generatedDensities = []
 		testInstrumentationRunner 'org.koitharu.kotatsu.HiltTestRunner'
 		ksp {
@@ -82,29 +82,31 @@ afterEvaluate {
 }
 dependencies {
 	//noinspection GradleDependency
-	implementation('com.github.KotatsuApp:kotatsu-parsers:86a2b95141') {
+	implementation('com.github.KotatsuApp:kotatsu-parsers:9821e93d25') {
 		exclude group: 'org.json', module: 'json'
 	}
 
 	coreLibraryDesugaring 'com.android.tools:desugar_jdk_libs:2.0.4'
-	implementation 'org.jetbrains.kotlin:kotlin-stdlib:1.9.21'
-	implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-android:1.7.3'
+	implementation 'org.jetbrains.kotlin:kotlin-stdlib:1.9.23'
+	implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-android:1.8.0'
 
 	implementation 'androidx.appcompat:appcompat:1.6.1'
 	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.collection:collection-ktx:1.4.0'
+	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-beta01'
+	implementation 'androidx.lifecycle:lifecycle-common-java8:2.7.0'
+	implementation 'androidx.webkit:webkit:1.10.0'
 
 	implementation 'androidx.work:work-runtime:2.9.0'
 	//noinspection GradleDependency
@@ -120,41 +122,45 @@ dependencies {
 
 	implementation 'com.squareup.okhttp3:okhttp:4.12.0'
 	implementation 'com.squareup.okhttp3:okhttp-dnsoverhttps:4.12.0'
-	implementation 'com.squareup.okio:okio:3.7.0'
+	implementation 'com.squareup.okio:okio:3.9.0'
 
 	implementation 'com.hannesdorfmann:adapterdelegates4-kotlin-dsl:4.3.2'
 	implementation 'com.hannesdorfmann:adapterdelegates4-kotlin-dsl-viewbinding:4.3.2'
 
-	implementation 'com.google.dagger:hilt-android:2.49'
-	kapt 'com.google.dagger:hilt-compiler:2.49'
-	implementation 'androidx.hilt:hilt-work:1.1.0'
-	kapt 'androidx.hilt:hilt-compiler:1.1.0'
+	implementation 'com.google.dagger:hilt-android:2.51'
+	kapt 'com.google.dagger:hilt-compiler:2.51'
+	implementation 'androidx.hilt:hilt-work:1.2.0'
+	kapt 'androidx.hilt:hilt-compiler:1.2.0'
 
-	implementation 'io.coil-kt:coil-base:2.5.0'
-	implementation 'io.coil-kt:coil-svg:2.5.0'
+	implementation 'io.coil-kt:coil-base:2.6.0'
+	implementation 'io.coil-kt:coil-svg:2.6.0'
 	implementation 'com.github.KotatsuApp:subsampling-scale-image-view:02e6d6cfe9'
 	implementation 'com.github.solkin:disk-lru-cache:1.4'
 	implementation 'io.noties.markwon:core:4.6.2'
 
 	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'
+	implementation 'org.conscrypt:conscrypt-android:2.5.2'
+
+	debugImplementation 'com.squareup.leakcanary:leakcanary-android:2.13'
 
 	testImplementation 'junit:junit:4.13.2'
-	testImplementation 'org.json:json:20231013'
-	testImplementation 'org.jetbrains.kotlinx:kotlinx-coroutines-test:1.7.3'
+	testImplementation 'org.json:json:20240303'
+	testImplementation 'org.jetbrains.kotlinx:kotlinx-coroutines-test:1.8.0'
 
 	androidTestImplementation 'androidx.test:runner:1.5.2'
 	androidTestImplementation 'androidx.test:rules:1.5.0'
 	androidTestImplementation 'androidx.test:core-ktx:1.5.0'
 	androidTestImplementation 'androidx.test.ext:junit-ktx:1.1.5'
 
-	androidTestImplementation 'org.jetbrains.kotlinx:kotlinx-coroutines-test:1.7.3'
+	androidTestImplementation 'org.jetbrains.kotlinx:kotlinx-coroutines-test:1.8.0'
 
 	androidTestImplementation 'androidx.room:room-testing:2.6.1'
-	androidTestImplementation 'com.squareup.moshi:moshi-kotlin:1.15.0'
+	androidTestImplementation 'com.squareup.moshi:moshi-kotlin:1.15.1'
 
-	androidTestImplementation 'com.google.dagger:hilt-android-testing:2.49'
-	kaptAndroidTest 'com.google.dagger:hilt-android-compiler:2.49'
+	androidTestImplementation 'com.google.dagger:hilt-android-testing:2.51'
+	kaptAndroidTest 'com.google.dagger:hilt-android-compiler:2.51'
 }

app/src/androidTest/kotlin/org/koitharu/kotatsu/core/os/AppShortcutManagerTest.kt

@@ -57,6 +57,7 @@ class AppShortcutManagerTest {
 			page = 4,
 			scroll = 2,
 			percent = 0.3f,
+			force = false,
 		)
 		awaitUpdate()
 

app/src/androidTest/kotlin/org/koitharu/kotatsu/settings/backup/AppBackupAgentTest.kt

@@ -7,7 +7,9 @@ import dagger.hilt.android.testing.HiltAndroidRule
 import dagger.hilt.android.testing.HiltAndroidTest
 import kotlinx.coroutines.flow.first
 import kotlinx.coroutines.test.runTest
-import org.junit.Assert.*
+import org.junit.Assert.assertEquals
+import org.junit.Assert.assertNull
+import org.junit.Assert.assertTrue
 import org.junit.Before
 import org.junit.Rule
 import org.junit.Test
@@ -61,6 +63,7 @@ class AppBackupAgentTest {
 			page = 3,
 			scroll = 40,
 			percent = 0.2f,
+			force = false,
 		)
 		val history = checkNotNull(historyRepository.getOne(SampleData.manga))
 

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/debug/kotlin/org/koitharu/kotatsu/core/network/CurlLoggingInterceptor.kt

@@ -10,6 +10,8 @@ class CurlLoggingInterceptor(
 	private val curlOptions: String? = null
 ) : Interceptor {
 
+	private val escapeRegex = Regex("([\\[\\]\"])")
+
 	override fun intercept(chain: Interceptor.Chain): Response {
 		val request = chain.request()
 		var isCompressed = false
@@ -40,7 +42,7 @@ class CurlLoggingInterceptor(
 		if (isCompressed) {
 			curlCmd.append(" --compressed")
 		}
-		curlCmd.append(" \"").append(request.url).append('"')
+		curlCmd.append(" \"").append(request.url.toString().escape()).append('"')
 
 		log("---cURL (" + request.url + ")")
 		log(curlCmd.toString())
@@ -48,7 +50,12 @@ class CurlLoggingInterceptor(
 		return chain.proceed(request)
 	}
 
-	private fun String.escape() = replace("\"", "\\\"")
+	private fun String.escape() = replace(escapeRegex) { match ->
+		"\\" + match.value
+	}
+		// .replace("\"", "\\\"")
+		// .replace("[", "\\[")
+		// .replace("]", "\\]")
 
 	private fun log(msg: String) {
 		Log.d("CURL", msg)

app/src/main/kotlin/org/koitharu/kotatsu/alternatives/domain/AlternativesUseCase.kt

@@ -0,0 +1,85 @@
+package org.koitharu.kotatsu.alternatives.domain
+
+import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.channelFlow
+import kotlinx.coroutines.flow.emptyFlow
+import kotlinx.coroutines.flow.map
+import kotlinx.coroutines.launch
+import kotlinx.coroutines.sync.Semaphore
+import kotlinx.coroutines.sync.withPermit
+import org.koitharu.kotatsu.core.parser.MangaRepository
+import org.koitharu.kotatsu.core.util.ext.almostEquals
+import org.koitharu.kotatsu.explore.data.MangaSourcesRepository
+import org.koitharu.kotatsu.parsers.model.Manga
+import org.koitharu.kotatsu.parsers.model.MangaListFilter
+import org.koitharu.kotatsu.parsers.model.MangaSource
+import org.koitharu.kotatsu.parsers.util.runCatchingCancellable
+import javax.inject.Inject
+
+private const val MAX_PARALLELISM = 4
+private const val MATCH_THRESHOLD = 0.2f
+
+class AlternativesUseCase @Inject constructor(
+	private val sourcesRepository: MangaSourcesRepository,
+	private val mangaRepositoryFactory: MangaRepository.Factory,
+) {
+
+	suspend operator fun invoke(manga: Manga): Flow<Manga> {
+		val sources = getSources(manga.source)
+		if (sources.isEmpty()) {
+			return emptyFlow()
+		}
+		val semaphore = Semaphore(MAX_PARALLELISM)
+		return channelFlow {
+			for (source in sources) {
+				val repository = mangaRepositoryFactory.create(source)
+				if (!repository.isSearchSupported) {
+					continue
+				}
+				launch {
+					val list = runCatchingCancellable {
+						semaphore.withPermit {
+							repository.getList(offset = 0, filter = MangaListFilter.Search(manga.title))
+						}
+					}.getOrDefault(emptyList())
+					for (item in list) {
+						if (item.matches(manga)) {
+							send(item)
+						}
+					}
+				}
+			}
+		}.map {
+			runCatchingCancellable {
+				mangaRepositoryFactory.create(it.source).getDetails(it)
+			}.getOrDefault(it)
+		}
+	}
+
+	private suspend fun getSources(ref: MangaSource): List<MangaSource> {
+		val result = ArrayList<MangaSource>(MangaSource.entries.size - 2)
+		result.addAll(sourcesRepository.getEnabledSources())
+		result.sortByDescending { it.priority(ref) }
+		result.addAll(sourcesRepository.getDisabledSources().sortedByDescending { it.priority(ref) })
+		return result
+	}
+
+	private fun Manga.matches(ref: Manga): Boolean {
+		return matchesTitles(title, ref.title) ||
+			matchesTitles(title, ref.altTitle) ||
+			matchesTitles(altTitle, ref.title) ||
+			matchesTitles(altTitle, ref.altTitle)
+
+	}
+
+	private fun matchesTitles(a: String?, b: String?): Boolean {
+		return !a.isNullOrEmpty() && !b.isNullOrEmpty() && a.almostEquals(b, MATCH_THRESHOLD)
+	}
+
+	private fun MangaSource.priority(ref: MangaSource): Int {
+		var res = 0
+		if (locale == ref.locale) res += 2
+		if (contentType == ref.contentType) res++
+		return res
+	}
+}

app/src/main/kotlin/org/koitharu/kotatsu/alternatives/domain/MigrateUseCase.kt

@@ -0,0 +1,129 @@
+package org.koitharu.kotatsu.alternatives.domain
+
+import androidx.room.withTransaction
+import org.koitharu.kotatsu.core.db.MangaDatabase
+import org.koitharu.kotatsu.core.model.getPreferredBranch
+import org.koitharu.kotatsu.core.parser.MangaDataRepository
+import org.koitharu.kotatsu.core.parser.MangaRepository
+import org.koitharu.kotatsu.details.domain.ProgressUpdateUseCase
+import org.koitharu.kotatsu.history.data.HistoryEntity
+import org.koitharu.kotatsu.history.data.PROGRESS_NONE
+import org.koitharu.kotatsu.history.data.toMangaHistory
+import org.koitharu.kotatsu.parsers.model.Manga
+import org.koitharu.kotatsu.parsers.model.MangaChapter
+import org.koitharu.kotatsu.parsers.util.runCatchingCancellable
+import javax.inject.Inject
+
+class MigrateUseCase @Inject constructor(
+	private val mangaRepositoryFactory: MangaRepository.Factory,
+	private val mangaDataRepository: MangaDataRepository,
+	private val database: MangaDatabase,
+	private val progressUpdateUseCase: ProgressUpdateUseCase,
+) {
+
+	suspend operator fun invoke(oldManga: Manga, newManga: Manga) {
+		val oldDetails = if (oldManga.chapters.isNullOrEmpty()) {
+			runCatchingCancellable {
+				mangaRepositoryFactory.create(oldManga.source).getDetails(oldManga)
+			}.getOrDefault(oldManga)
+		} else {
+			oldManga
+		}
+		val newDetails = if (newManga.chapters.isNullOrEmpty()) {
+			mangaRepositoryFactory.create(newManga.source).getDetails(newManga)
+		} else {
+			newManga
+		}
+		mangaDataRepository.storeManga(newDetails)
+		database.withTransaction {
+			// replace favorites
+			val favoritesDao = database.getFavouritesDao()
+			val oldFavourites = favoritesDao.findAllRaw(oldDetails.id)
+			if (oldFavourites.isNotEmpty()) {
+				favoritesDao.delete(oldManga.id)
+				for (f in oldFavourites) {
+					val e = f.copy(
+						mangaId = newManga.id,
+					)
+					favoritesDao.upsert(e)
+				}
+			}
+			// replace history
+			val historyDao = database.getHistoryDao()
+			val oldHistory = historyDao.find(oldDetails.id)
+			if (oldHistory != null) {
+				val newHistory = makeNewHistory(oldDetails, newDetails, oldHistory)
+				historyDao.delete(oldDetails.id)
+				historyDao.upsert(newHistory)
+			}
+		}
+		progressUpdateUseCase(newManga)
+	}
+
+	private fun makeNewHistory(
+		oldManga: Manga,
+		newManga: Manga,
+		history: HistoryEntity,
+	): HistoryEntity {
+		if (oldManga.chapters.isNullOrEmpty()) { // probably broken manga/source
+			val branch = newManga.getPreferredBranch(null)
+			val chapters = checkNotNull(newManga.getChapters(branch))
+			val currentChapter = if (history.percent in 0f..1f) {
+				chapters[(chapters.lastIndex * history.percent).toInt()]
+			} else {
+				chapters.first()
+			}
+			return HistoryEntity(
+				mangaId = newManga.id,
+				createdAt = history.createdAt,
+				updatedAt = System.currentTimeMillis(),
+				chapterId = currentChapter.id,
+				page = history.page,
+				scroll = history.scroll,
+				percent = history.percent,
+				deletedAt = 0,
+				chaptersCount = chapters.size,
+			)
+		}
+		val branch = oldManga.getPreferredBranch(history.toMangaHistory())
+		val oldChapters = checkNotNull(oldManga.getChapters(branch))
+		var index = oldChapters.indexOfFirst { it.id == history.chapterId }
+		if (index < 0) {
+			index = if (history.percent in 0f..1f) {
+				(oldChapters.lastIndex * history.percent).toInt()
+			} else {
+				0
+			}
+		}
+		val newChapters = checkNotNull(newManga.chapters).groupBy { it.branch }
+		val newBranch = if (newChapters.containsKey(branch)) {
+			branch
+		} else {
+			newManga.getPreferredBranch(null)
+		}
+		val newChapterId = checkNotNull(newChapters[newBranch]).let {
+			val oldChapter = oldChapters[index]
+			it.findByNumber(oldChapter.volume, oldChapter.number) ?: it.getOrNull(index) ?: it.last()
+		}.id
+
+		return HistoryEntity(
+			mangaId = newManga.id,
+			createdAt = history.createdAt,
+			updatedAt = System.currentTimeMillis(),
+			chapterId = newChapterId,
+			page = history.page,
+			scroll = history.scroll,
+			percent = PROGRESS_NONE,
+			deletedAt = 0,
+			chaptersCount = checkNotNull(newChapters[newBranch]).size,
+		)
+	}
+
+	private fun List<MangaChapter>.findByNumber(volume: Int, number: Float): MangaChapter? {
+		return if (number <= 0f) {
+			null
+		} else {
+			firstOrNull { it.volume == volume && it.number == number }
+		}
+	}
+}

app/src/main/kotlin/org/koitharu/kotatsu/alternatives/ui/AlternativeAD.kt

@@ -0,0 +1,92 @@
+package org.koitharu.kotatsu.alternatives.ui
+
+import android.text.style.ForegroundColorSpan
+import androidx.core.content.ContextCompat
+import androidx.core.text.buildSpannedString
+import androidx.core.text.inSpans
+import androidx.lifecycle.LifecycleOwner
+import coil.ImageLoader
+import coil.request.ImageRequest
+import coil.transform.CircleCropTransformation
+import com.hannesdorfmann.adapterdelegates4.dsl.adapterDelegateViewBinding
+import org.koitharu.kotatsu.R
+import org.koitharu.kotatsu.core.parser.favicon.faviconUri
+import org.koitharu.kotatsu.core.ui.image.ChipIconTarget
+import org.koitharu.kotatsu.core.ui.image.CoverSizeResolver
+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.newImageRequest
+import org.koitharu.kotatsu.core.util.ext.source
+import org.koitharu.kotatsu.databinding.ItemMangaAlternativeBinding
+import org.koitharu.kotatsu.list.ui.ListModelDiffCallback
+import org.koitharu.kotatsu.list.ui.model.ListModel
+import kotlin.math.sign
+import com.google.android.material.R as materialR
+
+fun alternativeAD(
+	coil: ImageLoader,
+	lifecycleOwner: LifecycleOwner,
+	listener: OnListItemClickListener<MangaAlternativeModel>,
+) = adapterDelegateViewBinding<MangaAlternativeModel, ListModel, ItemMangaAlternativeBinding>(
+	{ inflater, parent -> ItemMangaAlternativeBinding.inflate(inflater, parent, false) },
+) {
+
+	val colorGreen = ContextCompat.getColor(context, R.color.common_green)
+	val colorRed = ContextCompat.getColor(context, R.color.common_red)
+	val clickListener = AdapterDelegateClickListenerAdapter(this, listener)
+	itemView.setOnClickListener(clickListener)
+	binding.buttonMigrate.setOnClickListener(clickListener)
+	binding.chipSource.setOnClickListener(clickListener)
+
+	bind { payloads ->
+		binding.textViewTitle.text = item.manga.title
+		binding.textViewSubtitle.text = buildSpannedString {
+			if (item.chaptersCount > 0) {
+				append(context.resources.getQuantityString(R.plurals.chapters, item.chaptersCount, item.chaptersCount))
+			} else {
+				append(context.getString(R.string.no_chapters))
+			}
+			when (item.chaptersDiff.sign) {
+				-1 -> inSpans(ForegroundColorSpan(colorRed)) {
+					append("  ▼ ")
+					append(item.chaptersDiff.toString())
+				}
+
+				1 -> inSpans(ForegroundColorSpan(colorGreen)) {
+					append("  ▲ +")
+					append(item.chaptersDiff.toString())
+				}
+			}
+		}
+		binding.progressView.setPercent(item.progress, ListModelDiffCallback.PAYLOAD_PROGRESS_CHANGED in payloads)
+		binding.chipSource.also { chip ->
+			chip.text = item.manga.source.title
+			ImageRequest.Builder(context)
+				.data(item.manga.source.faviconUri())
+				.lifecycle(lifecycleOwner)
+				.crossfade(false)
+				.size(context.resources.getDimensionPixelSize(materialR.dimen.m3_chip_icon_size))
+				.target(ChipIconTarget(chip))
+				.placeholder(R.drawable.ic_web)
+				.fallback(R.drawable.ic_web)
+				.error(R.drawable.ic_web)
+				.source(item.manga.source)
+				.transformations(CircleCropTransformation())
+				.allowRgb565(true)
+				.enqueueWith(coil)
+		}
+		binding.imageViewCover.newImageRequest(lifecycleOwner, item.manga.coverUrl)?.run {
+			size(CoverSizeResolver(binding.imageViewCover))
+			placeholder(R.drawable.ic_placeholder)
+			fallback(R.drawable.ic_placeholder)
+			error(R.drawable.ic_error_placeholder)
+			transformations(TrimTransformation())
+			allowRgb565(true)
+			tag(item.manga)
+			source(item.manga.source)
+			enqueueWith(coil)
+		}
+	}
+}

app/src/main/kotlin/org/koitharu/kotatsu/alternatives/ui/AlternativesActivity.kt

@@ -0,0 +1,114 @@
+package org.koitharu.kotatsu.alternatives.ui
+
+import android.content.Context
+import android.content.Intent
+import android.os.Bundle
+import android.view.View
+import android.widget.Toast
+import androidx.activity.viewModels
+import androidx.core.graphics.Insets
+import androidx.core.view.updatePadding
+import coil.ImageLoader
+import com.google.android.material.dialog.MaterialAlertDialogBuilder
+import dagger.hilt.android.AndroidEntryPoint
+import org.koitharu.kotatsu.R
+import org.koitharu.kotatsu.core.exceptions.resolve.SnackbarErrorObserver
+import org.koitharu.kotatsu.core.model.parcelable.ParcelableManga
+import org.koitharu.kotatsu.core.parser.MangaIntent
+import org.koitharu.kotatsu.core.ui.BaseActivity
+import org.koitharu.kotatsu.core.ui.BaseListAdapter
+import org.koitharu.kotatsu.core.ui.list.OnListItemClickListener
+import org.koitharu.kotatsu.core.util.ext.DIALOG_THEME_CENTERED
+import org.koitharu.kotatsu.core.util.ext.observe
+import org.koitharu.kotatsu.core.util.ext.observeEvent
+import org.koitharu.kotatsu.databinding.ActivityAlternativesBinding
+import org.koitharu.kotatsu.details.ui.DetailsActivity
+import org.koitharu.kotatsu.list.ui.adapter.ListItemType
+import org.koitharu.kotatsu.list.ui.adapter.TypedListSpacingDecoration
+import org.koitharu.kotatsu.list.ui.adapter.emptyStateListAD
+import org.koitharu.kotatsu.list.ui.adapter.loadingFooterAD
+import org.koitharu.kotatsu.list.ui.adapter.loadingStateAD
+import org.koitharu.kotatsu.list.ui.model.ListModel
+import org.koitharu.kotatsu.parsers.model.Manga
+import org.koitharu.kotatsu.search.ui.SearchActivity
+import javax.inject.Inject
+
+@AndroidEntryPoint
+class AlternativesActivity : BaseActivity<ActivityAlternativesBinding>(),
+	OnListItemClickListener<MangaAlternativeModel> {
+
+	@Inject
+	lateinit var coil: ImageLoader
+
+	private val viewModel by viewModels<AlternativesViewModel>()
+
+	override fun onCreate(savedInstanceState: Bundle?) {
+		super.onCreate(savedInstanceState)
+		setContentView(ActivityAlternativesBinding.inflate(layoutInflater))
+		supportActionBar?.run {
+			setDisplayHomeAsUpEnabled(true)
+			subtitle = viewModel.manga.title
+		}
+		val listAdapter = BaseListAdapter<ListModel>()
+			.addDelegate(ListItemType.MANGA_LIST_DETAILED, alternativeAD(coil, this, this))
+			.addDelegate(ListItemType.STATE_EMPTY, emptyStateListAD(coil, this, null))
+			.addDelegate(ListItemType.FOOTER_LOADING, loadingFooterAD())
+			.addDelegate(ListItemType.STATE_LOADING, loadingStateAD())
+		with(viewBinding.recyclerView) {
+			setHasFixedSize(true)
+			addItemDecoration(TypedListSpacingDecoration(context, addHorizontalPadding = false))
+			adapter = listAdapter
+		}
+
+		viewModel.onError.observeEvent(this, SnackbarErrorObserver(viewBinding.recyclerView, null))
+		viewModel.content.observe(this, listAdapter)
+		viewModel.onMigrated.observeEvent(this) {
+			Toast.makeText(this, R.string.migration_completed, Toast.LENGTH_SHORT).show()
+			startActivity(DetailsActivity.newIntent(this, it))
+			finishAfterTransition()
+		}
+	}
+
+	override fun onWindowInsetsChanged(insets: Insets) {
+		viewBinding.root.updatePadding(
+			left = insets.left,
+			right = insets.right,
+		)
+		viewBinding.recyclerView.updatePadding(
+			bottom = insets.bottom + viewBinding.recyclerView.paddingTop,
+		)
+	}
+
+	override fun onItemClick(item: MangaAlternativeModel, view: View) {
+		when (view.id) {
+			R.id.chip_source -> startActivity(SearchActivity.newIntent(this, item.manga.source, viewModel.manga.title))
+			R.id.button_migrate -> confirmMigration(item.manga)
+			else -> startActivity(DetailsActivity.newIntent(this, item.manga))
+		}
+	}
+
+	private fun confirmMigration(target: Manga) {
+		MaterialAlertDialogBuilder(this, DIALOG_THEME_CENTERED)
+			.setIcon(R.drawable.ic_replace)
+			.setTitle(R.string.manga_migration)
+			.setMessage(
+				getString(
+					R.string.migrate_confirmation,
+					viewModel.manga.title,
+					viewModel.manga.source.title,
+					target.title,
+					target.source.title,
+				),
+			)
+			.setNegativeButton(android.R.string.cancel, null)
+			.setPositiveButton(R.string.migrate) { _, _ ->
+				viewModel.migrate(target)
+			}.show()
+	}
+
+	companion object {
+
+		fun newIntent(context: Context, manga: Manga) = Intent(context, AlternativesActivity::class.java)
+			.putExtra(MangaIntent.KEY_MANGA, ParcelableManga(manga))
+	}
+}

app/src/main/kotlin/org/koitharu/kotatsu/alternatives/ui/AlternativesViewModel.kt

@@ -0,0 +1,98 @@
+package org.koitharu.kotatsu.alternatives.ui
+
+import androidx.lifecycle.SavedStateHandle
+import dagger.hilt.android.lifecycle.HiltViewModel
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.Job
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.map
+import kotlinx.coroutines.flow.onEmpty
+import kotlinx.coroutines.flow.runningFold
+import org.koitharu.kotatsu.R
+import org.koitharu.kotatsu.alternatives.domain.AlternativesUseCase
+import org.koitharu.kotatsu.alternatives.domain.MigrateUseCase
+import org.koitharu.kotatsu.core.model.chaptersCount
+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.require
+import org.koitharu.kotatsu.list.domain.ListExtraProvider
+import org.koitharu.kotatsu.list.ui.model.EmptyState
+import org.koitharu.kotatsu.list.ui.model.ListModel
+import org.koitharu.kotatsu.list.ui.model.LoadingFooter
+import org.koitharu.kotatsu.list.ui.model.LoadingState
+import org.koitharu.kotatsu.parsers.model.Manga
+import org.koitharu.kotatsu.parsers.util.runCatchingCancellable
+import javax.inject.Inject
+
+@HiltViewModel
+class AlternativesViewModel @Inject constructor(
+	savedStateHandle: SavedStateHandle,
+	private val mangaRepositoryFactory: MangaRepository.Factory,
+	private val alternativesUseCase: AlternativesUseCase,
+	private val migrateUseCase: MigrateUseCase,
+	private val extraProvider: ListExtraProvider,
+) : BaseViewModel() {
+
+	val manga = savedStateHandle.require<ParcelableManga>(MangaIntent.KEY_MANGA).manga
+
+	val onMigrated = MutableEventFlow<Manga>()
+	val content = MutableStateFlow<List<ListModel>>(listOf(LoadingState))
+	private var migrationJob: Job? = null
+
+	init {
+		launchJob(Dispatchers.Default) {
+			val ref = runCatchingCancellable {
+				mangaRepositoryFactory.create(manga.source).getDetails(manga)
+			}.getOrDefault(manga)
+			val refCount = ref.chaptersCount()
+			alternativesUseCase(ref)
+				.map {
+					MangaAlternativeModel(
+						manga = it,
+						progress = extraProvider.getProgress(it.id),
+						referenceChapters = refCount,
+					)
+				}.runningFold<MangaAlternativeModel, List<ListModel>>(listOf(LoadingState)) { acc, item ->
+					acc.filterIsInstance<MangaAlternativeModel>() + item + LoadingFooter()
+				}.onEmpty {
+					emit(
+						listOf(
+							EmptyState(
+								icon = R.drawable.ic_empty_common,
+								textPrimary = R.string.nothing_found,
+								textSecondary = R.string.text_search_holder_secondary,
+								actionStringRes = 0,
+							),
+						),
+					)
+				}.collect {
+					content.value = it
+				}
+			content.value = content.value.filterNot { it is LoadingFooter }
+		}
+	}
+
+	fun migrate(target: Manga) {
+		if (migrationJob?.isActive == true) {
+			return
+		}
+		migrationJob = launchLoadingJob(Dispatchers.Default) {
+			migrateUseCase(manga, target)
+			onMigrated.call(target)
+		}
+	}
+
+	private suspend fun mapList(list: List<Manga>, refCount: Int): List<MangaAlternativeModel> {
+		return list.map {
+			MangaAlternativeModel(
+				manga = it,
+				progress = extraProvider.getProgress(it.id),
+				referenceChapters = refCount,
+			)
+		}
+	}
+}

app/src/main/kotlin/org/koitharu/kotatsu/alternatives/ui/MangaAlternativeModel.kt

@@ -0,0 +1,21 @@
+package org.koitharu.kotatsu.alternatives.ui
+
+import org.koitharu.kotatsu.core.model.chaptersCount
+import org.koitharu.kotatsu.list.ui.model.ListModel
+import org.koitharu.kotatsu.parsers.model.Manga
+
+data class MangaAlternativeModel(
+	val manga: Manga,
+	val progress: Float,
+	private val referenceChapters: Int,
+) : ListModel {
+
+	val chaptersCount = manga.chaptersCount()
+
+	val chaptersDiff: Int
+		get() = if (referenceChapters == 0 || chaptersCount == 0) 0 else chaptersCount - referenceChapters
+
+	override fun areItemsTheSame(other: ListModel): Boolean {
+		return other is MangaAlternativeModel && other.manga.id == manga.id
+	}
+}

app/src/main/kotlin/org/koitharu/kotatsu/bookmarks/data/EntityMapping.kt

@@ -2,7 +2,7 @@ package org.koitharu.kotatsu.bookmarks.data
 
 import org.koitharu.kotatsu.bookmarks.domain.Bookmark
 import org.koitharu.kotatsu.parsers.model.Manga
-import java.util.Date
+import java.time.Instant
 
 fun BookmarkEntity.toBookmark(manga: Manga) = Bookmark(
 	manga = manga,
@@ -11,7 +11,7 @@ fun BookmarkEntity.toBookmark(manga: Manga) = Bookmark(
 	page = page,
 	scroll = scroll,
 	imageUrl = imageUrl,
-	createdAt = Date(createdAt),
+	createdAt = Instant.ofEpochMilli(createdAt),
 	percent = percent,
 )
 
@@ -22,7 +22,7 @@ fun Bookmark.toEntity() = BookmarkEntity(
 	page = page,
 	scroll = scroll,
 	imageUrl = imageUrl,
-	createdAt = createdAt.time,
+	createdAt = createdAt.toEpochMilli(),
 	percent = percent,
 )
 

app/src/main/kotlin/org/koitharu/kotatsu/bookmarks/domain/Bookmark.kt

@@ -4,7 +4,7 @@ import org.koitharu.kotatsu.list.ui.model.ListModel
 import org.koitharu.kotatsu.local.data.hasImageExtension
 import org.koitharu.kotatsu.parsers.model.Manga
 import org.koitharu.kotatsu.parsers.model.MangaPage
-import java.util.Date
+import java.time.Instant
 
 data class Bookmark(
 	val manga: Manga,
@@ -13,7 +13,7 @@ data class Bookmark(
 	val page: Int,
 	val scroll: Int,
 	val imageUrl: String,
-	val createdAt: Date,
+	val createdAt: Instant,
 	val percent: Float,
 ) : ListModel {
 

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/browser/BrowserActivity.kt

@@ -14,9 +14,9 @@ import androidx.core.view.isVisible
 import androidx.core.view.updatePadding
 import org.koitharu.kotatsu.R
 import org.koitharu.kotatsu.core.ui.BaseActivity
-import org.koitharu.kotatsu.core.util.ext.catchingWebViewUnavailability
+import org.koitharu.kotatsu.core.util.ext.configureForParser
+import org.koitharu.kotatsu.core.util.ext.toUriOrNull
 import org.koitharu.kotatsu.databinding.ActivityBrowserBinding
-import org.koitharu.kotatsu.parsers.network.UserAgents
 import com.google.android.material.R as materialR
 
 @SuppressLint("SetJavaScriptEnabled")
@@ -26,17 +26,14 @@ class BrowserActivity : BaseActivity<ActivityBrowserBinding>(), BrowserCallback
 
 	override fun onCreate(savedInstanceState: Bundle?) {
 		super.onCreate(savedInstanceState)
-		if (!catchingWebViewUnavailability { setContentView(ActivityBrowserBinding.inflate(layoutInflater)) }) {
+		if (!setContentViewWebViewSafe { ActivityBrowserBinding.inflate(layoutInflater) }) {
 			return
 		}
 		supportActionBar?.run {
 			setDisplayHomeAsUpEnabled(true)
 			setHomeAsUpIndicator(materialR.drawable.abc_ic_clear_material)
 		}
-		with(viewBinding.webView.settings) {
-			javaScriptEnabled = true
-			userAgentString = UserAgents.CHROME_MOBILE
-		}
+		viewBinding.webView.configureForParser(null)
 		CookieManager.getInstance().setAcceptThirdPartyCookies(viewBinding.webView, true)
 		viewBinding.webView.webViewClient = BrowserClient(this)
 		viewBinding.webView.webChromeClient = ProgressChromeClient(viewBinding.progressBar)
@@ -81,11 +78,14 @@ class BrowserActivity : BaseActivity<ActivityBrowserBinding>(), BrowserCallback
 		}
 
 		R.id.action_browser -> {
-			val intent = Intent(Intent.ACTION_VIEW)
-			intent.data = Uri.parse(viewBinding.webView.url)
-			try {
-				startActivity(Intent.createChooser(intent, item.title))
-			} catch (_: ActivityNotFoundException) {
+			val url = viewBinding.webView.url?.toUriOrNull()
+			if (url != null) {
+				val intent = Intent(Intent.ACTION_VIEW)
+				intent.data = url
+				try {
+					startActivity(Intent.createChooser(intent, item.title))
+				} catch (_: ActivityNotFoundException) {
+				}
 			}
 			true
 		}

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

@@ -13,6 +13,7 @@ import org.koitharu.kotatsu.R
 import org.koitharu.kotatsu.core.exceptions.CloudFlareProtectedException
 import org.koitharu.kotatsu.core.util.ext.checkNotificationPermission
 import org.koitharu.kotatsu.parsers.model.ContentType
+import org.koitharu.kotatsu.parsers.model.MangaSource
 
 class CaptchaNotifier(
 	private val context: Context,
@@ -58,16 +59,27 @@ class CaptchaNotifier(
 		manager.notify(TAG, exception.source.hashCode(), notification)
 	}
 
+	fun dismiss(source: MangaSource) {
+		NotificationManagerCompat.from(context).cancel(TAG, source.hashCode())
+	}
+
 	override fun onError(request: ImageRequest, result: ErrorResult) {
 		super.onError(request, result)
 		val e = result.throwable
-		if (e is CloudFlareProtectedException) {
+		if (e is CloudFlareProtectedException && request.parameters.value<Boolean>(PARAM_IGNORE_CAPTCHA) != true) {
 			notify(e)
 		}
 	}
 
-	private companion object {
+	companion object {
 
+		fun ImageRequest.Builder.ignoreCaptchaErrors() = setParameter(
+			key = PARAM_IGNORE_CAPTCHA,
+			value = true,
+			memoryCacheKey = null,
+		)
+
+		private const val PARAM_IGNORE_CAPTCHA = "ignore_captcha"
 		private const val CHANNEL_ID = "captcha"
 		private const val TAG = CHANNEL_ID
 	}

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

@@ -27,9 +27,8 @@ import org.koitharu.kotatsu.core.network.CommonHeaders
 import org.koitharu.kotatsu.core.network.cookies.MutableCookieJar
 import org.koitharu.kotatsu.core.ui.BaseActivity
 import org.koitharu.kotatsu.core.util.TaggedActivityResult
-import org.koitharu.kotatsu.core.util.ext.catchingWebViewUnavailability
+import org.koitharu.kotatsu.core.util.ext.configureForParser
 import org.koitharu.kotatsu.databinding.ActivityBrowserBinding
-import org.koitharu.kotatsu.parsers.network.UserAgents
 import javax.inject.Inject
 import com.google.android.material.R as materialR
 
@@ -41,17 +40,12 @@ class CloudFlareActivity : BaseActivity<ActivityBrowserBinding>(), CloudFlareCal
 	@Inject
 	lateinit var cookieJar: MutableCookieJar
 
+	private lateinit var cfClient: CloudFlareClient
 	private var onBackPressedCallback: WebViewBackPressedCallback? = null
 
 	override fun onCreate(savedInstanceState: Bundle?) {
 		super.onCreate(savedInstanceState)
-		if (!catchingWebViewUnavailability {
-				setContentView(
-					ActivityBrowserBinding.inflate(
-						layoutInflater,
-					),
-				)
-			}) {
+		if (!setContentViewWebViewSafe { ActivityBrowserBinding.inflate(layoutInflater) }) {
 			return
 		}
 		supportActionBar?.run {
@@ -59,13 +53,9 @@ class CloudFlareActivity : BaseActivity<ActivityBrowserBinding>(), CloudFlareCal
 			setHomeAsUpIndicator(materialR.drawable.abc_ic_clear_material)
 		}
 		val url = intent?.dataString.orEmpty()
-		with(viewBinding.webView.settings) {
-			javaScriptEnabled = true
-			domStorageEnabled = true
-			databaseEnabled = true
-			userAgentString = intent?.getStringExtra(ARG_UA) ?: UserAgents.CHROME_MOBILE
-		}
-		viewBinding.webView.webViewClient = CloudFlareClient(cookieJar, this, url)
+		cfClient = CloudFlareClient(cookieJar, this, url)
+		viewBinding.webView.configureForParser(intent?.getStringExtra(ARG_UA))
+		viewBinding.webView.webViewClient = cfClient
 		onBackPressedCallback = WebViewBackPressedCallback(viewBinding.webView).also {
 			onBackPressedDispatcher.addCallback(it)
 		}
@@ -125,15 +115,7 @@ class CloudFlareActivity : BaseActivity<ActivityBrowserBinding>(), CloudFlareCal
 		}
 
 		R.id.action_retry -> {
-			lifecycleScope.launch {
-				viewBinding.webView.stopLoading()
-				yield()
-				val targetUrl = intent?.dataString?.toHttpUrlOrNull()
-				if (targetUrl != null) {
-					clearCfCookies(targetUrl)
-					viewBinding.webView.loadUrl(targetUrl.toString())
-				}
-			}
+			restartCheck()
 			true
 		}
 
@@ -159,6 +141,10 @@ class CloudFlareActivity : BaseActivity<ActivityBrowserBinding>(), CloudFlareCal
 		viewBinding.progressBar.isInvisible = true
 	}
 
+	override fun onLoopDetected() {
+		restartCheck()
+	}
+
 	override fun onCheckPassed() {
 		pendingResult = RESULT_OK
 		finishAfterTransition()
@@ -178,10 +164,23 @@ class CloudFlareActivity : BaseActivity<ActivityBrowserBinding>(), CloudFlareCal
 			subtitle?.toString()?.toHttpUrlOrNull()?.topPrivateDomain() ?: subtitle
 	}
 
+	private fun restartCheck() {
+		lifecycleScope.launch {
+			viewBinding.webView.stopLoading()
+			yield()
+			cfClient.reset()
+			val targetUrl = intent?.dataString?.toHttpUrlOrNull()
+			if (targetUrl != null) {
+				clearCfCookies(targetUrl)
+				viewBinding.webView.loadUrl(targetUrl.toString())
+			}
+		}
+	}
+
 	private suspend fun clearCfCookies(url: HttpUrl) = runInterruptible(Dispatchers.Default) {
 		cookieJar.removeCookies(url) { cookie ->
 			val name = cookie.name
-			name.startsWith("cf_") || name.startsWith("_cf") || name.startsWith("__cf")
+			name.startsWith("cf_") || name.startsWith("_cf") || name.startsWith("__cf") || name == "csrftoken"
 		}
 	}
 

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

@@ -11,4 +11,6 @@ interface CloudFlareCallback : BrowserCallback {
 	fun onPageLoaded()
 
 	fun onCheckPassed()
+
+	fun onLoopDetected()
 }

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

@@ -7,6 +7,7 @@ import org.koitharu.kotatsu.browser.BrowserClient
 import org.koitharu.kotatsu.core.network.cookies.MutableCookieJar
 
 private const val CF_CLEARANCE = "cf_clearance"
+private const val LOOP_COUNTER = 3
 
 class CloudFlareClient(
 	private val cookieJar: MutableCookieJar,
@@ -15,6 +16,7 @@ class CloudFlareClient(
 ) : BrowserClient(callback) {
 
 	private val oldClearance = getClearance()
+	private var counter = 0
 
 	override fun onPageStarted(view: WebView?, url: String?, favicon: Bitmap?) {
 		super.onPageStarted(view, url, favicon)
@@ -31,10 +33,20 @@ class CloudFlareClient(
 		callback.onPageLoaded()
 	}
 
+	fun reset() {
+		counter = 0
+	}
+
 	private fun checkClearance() {
 		val clearance = getClearance()
 		if (clearance != null && clearance != oldClearance) {
 			callback.onCheckPassed()
+		} else {
+			counter++
+			if (counter >= LOOP_COUNTER) {
+				reset()
+				callback.onLoopDetected()
+			}
 		}
 	}
 

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

@@ -2,6 +2,7 @@ package org.koitharu.kotatsu.core
 
 import android.app.Application
 import android.content.Context
+import android.os.Build
 import androidx.annotation.WorkerThread
 import androidx.appcompat.app.AppCompatDelegate
 import androidx.hilt.work.HiltWorkerFactory
@@ -19,6 +20,7 @@ import org.acra.config.httpSender
 import org.acra.data.StringFormat
 import org.acra.ktx.initAcra
 import org.acra.sender.HttpSender
+import org.conscrypt.Conscrypt
 import org.koitharu.kotatsu.BuildConfig
 import org.koitharu.kotatsu.R
 import org.koitharu.kotatsu.core.db.MangaDatabase
@@ -27,6 +29,7 @@ import org.koitharu.kotatsu.core.prefs.AppSettings
 import org.koitharu.kotatsu.core.util.WorkServiceStopHelper
 import org.koitharu.kotatsu.core.util.ext.processLifecycleScope
 import org.koitharu.kotatsu.settings.work.WorkScheduleManager
+import java.security.Security
 import javax.inject.Inject
 import javax.inject.Provider
 
@@ -52,7 +55,7 @@ open class BaseApp : Application(), Configuration.Provider {
 	lateinit var appValidator: AppValidator
 
 	@Inject
-	lateinit var workScheduleManager: Provider<WorkScheduleManager>
+	lateinit var workScheduleManager: WorkScheduleManager
 
 	@Inject
 	lateinit var workManagerProvider: Provider<WorkManager>
@@ -66,6 +69,10 @@ open class BaseApp : Application(), Configuration.Provider {
 		super.onCreate()
 		AppCompatDelegate.setDefaultNightMode(settings.theme)
 		AppCompatDelegate.setApplicationLocales(settings.appLocales)
+		// TLS 1.3 support for Android < 10
+		if (Build.VERSION.SDK_INT < Build.VERSION_CODES.Q) {
+			Security.insertProviderAt(Conscrypt.newProvider(), 1)
+		}
 		setupActivityLifecycleCallbacks()
 		processLifecycleScope.launch {
 			val isOriginalApp = withContext(Dispatchers.Default) {
@@ -76,7 +83,7 @@ open class BaseApp : Application(), Configuration.Provider {
 		processLifecycleScope.launch(Dispatchers.Default) {
 			setupDatabaseObservers()
 		}
-		workScheduleManager.get().init()
+		workScheduleManager.init()
 		WorkServiceStopHelper(workManagerProvider).setup()
 	}
 

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/backup/BackupRepository.kt

@@ -55,7 +55,7 @@ class BackupRepository @Inject constructor(
 		var offset = 0
 		val entry = BackupEntry(BackupEntry.Name.FAVOURITES, JSONArray())
 		while (true) {
-			val favourites = db.getFavouritesDao().findAll(offset, PAGE_SIZE)
+			val favourites = db.getFavouritesDao().findAllRaw(offset, PAGE_SIZE)
 			if (favourites.isEmpty()) {
 				break
 			}

app/src/main/kotlin/org/koitharu/kotatsu/core/backup/BackupZipOutput.kt

@@ -5,10 +5,10 @@ import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.runInterruptible
 import okio.Closeable
 import org.koitharu.kotatsu.R
-import org.koitharu.kotatsu.core.util.ext.format
 import org.koitharu.kotatsu.core.zip.ZipOutput
 import java.io.File
-import java.util.Date
+import java.time.LocalDate
+import java.time.format.DateTimeFormatter
 import java.util.Locale
 import java.util.zip.Deflater
 
@@ -39,7 +39,7 @@ suspend fun BackupZipOutput(context: Context): BackupZipOutput = runInterruptibl
 	val filename = buildString {
 		append(context.getString(R.string.app_name).replace(' ', '_').lowercase(Locale.ROOT))
 		append('_')
-		append(Date().format("ddMMyyyy"))
+		append(LocalDate.now().format(DateTimeFormatter.ofPattern("ddMMyyyy")))
 		append(".bk.zip")
 	}
 	BackupZipOutput(File(dir, filename))

app/src/main/kotlin/org/koitharu/kotatsu/core/backup/JsonDeserializer.kt

@@ -54,6 +54,7 @@ class JsonDeserializer(private val json: JSONObject) {
 		page = json.getInt("page"),
 		scroll = json.getDouble("scroll").toFloat(),
 		percent = json.getFloatOrDefault("percent", -1f),
+		chaptersCount = json.getIntOrDefault("chapters", -1),
 		deletedAt = 0L,
 	)
 

app/src/main/kotlin/org/koitharu/kotatsu/core/backup/JsonSerializer.kt

@@ -41,6 +41,7 @@ class JsonSerializer private constructor(private val json: JSONObject) {
 			put("page", e.page)
 			put("scroll", e.scroll)
 			put("percent", e.percent)
+			put("chapters", e.chaptersCount)
 		},
 	)
 

app/src/main/kotlin/org/koitharu/kotatsu/core/cache/ContentCache.kt

@@ -20,6 +20,8 @@ interface ContentCache {
 
 	fun putRelatedManga(source: MangaSource, url: String, related: SafeDeferred<List<Manga>>)
 
+	fun clear(source: MangaSource)
+
 	data class Key(
 		val source: MangaSource,
 		val url: String,

app/src/main/kotlin/org/koitharu/kotatsu/core/cache/ExpiringLruCache.kt

@@ -7,10 +7,12 @@ class ExpiringLruCache<T>(
 	val maxSize: Int,
 	private val lifetime: Long,
 	private val timeUnit: TimeUnit,
-) {
+) : Iterable<ContentCache.Key> {
 
 	private val cache = LruCache<ContentCache.Key, ExpiringValue<T>>(maxSize)
 
+	override fun iterator(): Iterator<ContentCache.Key> = cache.snapshot().keys.iterator()
+
 	operator fun get(key: ContentCache.Key): T? {
 		val value = cache[key] ?: return null
 		if (value.isExpired) {
@@ -30,4 +32,8 @@ class ExpiringLruCache<T>(
 	fun trimToSize(size: Int) {
 		cache.trimToSize(size)
 	}
+
+	fun remove(key: ContentCache.Key) {
+		cache.remove(key)
+	}
 }

app/src/main/kotlin/org/koitharu/kotatsu/core/cache/MemoryContentCache.kt

@@ -44,6 +44,12 @@ class MemoryContentCache(application: Application) : ContentCache, ComponentCall
 		relatedMangaCache[ContentCache.Key(source, url)] = related
 	}
 
+	override fun clear(source: MangaSource) {
+		clearCache(detailsCache, source)
+		clearCache(pagesCache, source)
+		clearCache(relatedMangaCache, source)
+	}
+
 	override fun onConfigurationChanged(newConfig: Configuration) = Unit
 
 	override fun onLowMemory() = Unit
@@ -67,4 +73,12 @@ class MemoryContentCache(application: Application) : ContentCache, ComponentCall
 			else -> cache.trimToSize(cache.maxSize / 2)
 		}
 	}
+
+	private fun clearCache(cache: ExpiringLruCache<*>, source: MangaSource) {
+		cache.forEach { key ->
+			if (key.source == source) {
+				cache.remove(key)
+			}
+		}
+	}
 }

app/src/main/kotlin/org/koitharu/kotatsu/core/cache/StubContentCache.kt

@@ -19,4 +19,6 @@ class StubContentCache : ContentCache {
 	override suspend fun getRelatedManga(source: MangaSource, url: String): List<Manga>? = null
 
 	override fun putRelatedManga(source: MangaSource, url: String, related: SafeDeferred<List<Manga>>) = Unit
+
+	override fun clear(source: MangaSource) = Unit
 }

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

@@ -30,6 +30,7 @@ import org.koitharu.kotatsu.core.db.migrations.Migration14To15
 import org.koitharu.kotatsu.core.db.migrations.Migration15To16
 import org.koitharu.kotatsu.core.db.migrations.Migration16To17
 import org.koitharu.kotatsu.core.db.migrations.Migration17To18
+import org.koitharu.kotatsu.core.db.migrations.Migration18To19
 import org.koitharu.kotatsu.core.db.migrations.Migration1To2
 import org.koitharu.kotatsu.core.db.migrations.Migration2To3
 import org.koitharu.kotatsu.core.db.migrations.Migration3To4
@@ -48,20 +49,22 @@ import org.koitharu.kotatsu.history.data.HistoryDao
 import org.koitharu.kotatsu.history.data.HistoryEntity
 import org.koitharu.kotatsu.scrobbling.common.data.ScrobblingDao
 import org.koitharu.kotatsu.scrobbling.common.data.ScrobblingEntity
+import org.koitharu.kotatsu.stats.data.StatsDao
+import org.koitharu.kotatsu.stats.data.StatsEntity
 import org.koitharu.kotatsu.suggestions.data.SuggestionDao
 import org.koitharu.kotatsu.suggestions.data.SuggestionEntity
 import org.koitharu.kotatsu.tracker.data.TrackEntity
 import org.koitharu.kotatsu.tracker.data.TrackLogEntity
 import org.koitharu.kotatsu.tracker.data.TracksDao
 
-const val DATABASE_VERSION = 18
+const val DATABASE_VERSION = 19
 
 @Database(
 	entities = [
 		MangaEntity::class, TagEntity::class, HistoryEntity::class, MangaTagsEntity::class,
 		FavouriteCategoryEntity::class, FavouriteEntity::class, MangaPrefsEntity::class,
 		TrackEntity::class, TrackLogEntity::class, SuggestionEntity::class, BookmarkEntity::class,
-		ScrobblingEntity::class, MangaSourceEntity::class,
+		ScrobblingEntity::class, MangaSourceEntity::class, StatsEntity::class,
 	],
 	version = DATABASE_VERSION,
 )
@@ -90,6 +93,8 @@ abstract class MangaDatabase : RoomDatabase() {
 	abstract fun getScrobblingDao(): ScrobblingDao
 
 	abstract fun getSourcesDao(): MangaSourcesDao
+
+	abstract fun getStatsDao(): StatsDao
 }
 
 fun getDatabaseMigrations(context: Context): Array<Migration> = arrayOf(
@@ -110,6 +115,7 @@ fun getDatabaseMigrations(context: Context): Array<Migration> = arrayOf(
 	Migration15To16(),
 	Migration16To17(context),
 	Migration17To18(),
+	Migration18To19(),
 )
 
 fun MangaDatabase(context: Context): MangaDatabase = Room

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

@@ -29,6 +29,9 @@ abstract class MangaSourcesDao {
 	@Query("SELECT * FROM sources ORDER BY sort_key")
 	abstract fun observeAll(): Flow<List<MangaSourceEntity>>
 
+	@Query("SELECT enabled FROM sources WHERE source = :source")
+	abstract fun observeIsEnabled(source: String): Flow<Boolean>
+
 	@Query("SELECT IFNULL(MAX(sort_key),0) FROM sources")
 	abstract suspend fun getMaxSortKey(): Int
 

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

@@ -31,6 +31,16 @@ abstract class TagsDao {
 	)
 	abstract suspend fun findPopularTags(source: String, limit: Int): List<TagEntity>
 
+	@Query(
+		"""SELECT tags.* FROM tags
+		LEFT JOIN manga_tags ON tags.tag_id = manga_tags.tag_id 
+		WHERE tags.source = :source  
+		GROUP BY tags.title
+		ORDER BY COUNT(manga_id) ASC 
+		LIMIT :limit""",
+	)
+	abstract suspend fun findRareTags(source: String, limit: Int): List<TagEntity>
+
 	@Query(
 		"""SELECT tags.* FROM tags
 		LEFT JOIN manga_tags ON tags.tag_id = manga_tags.tag_id 

app/src/main/kotlin/org/koitharu/kotatsu/core/db/migrations/Migration18To19.kt

@@ -0,0 +1,12 @@
+package org.koitharu.kotatsu.core.db.migrations
+
+import androidx.room.migration.Migration
+import androidx.sqlite.db.SupportSQLiteDatabase
+
+class Migration18To19 : Migration(18, 19) {
+
+	override fun migrate(db: SupportSQLiteDatabase) {
+		db.execSQL("ALTER TABLE history ADD COLUMN `chapters` INTEGER NOT NULL DEFAULT -1")
+		db.execSQL("CREATE TABLE IF NOT EXISTS `stats` (`manga_id` INTEGER NOT NULL, `started_at` INTEGER NOT NULL, `duration` INTEGER NOT NULL, `pages` INTEGER NOT NULL, PRIMARY KEY(`manga_id`, `started_at`), FOREIGN KEY(`manga_id`) REFERENCES `history`(`manga_id`) ON UPDATE NO ACTION ON DELETE CASCADE )")
+	}
+}

app/src/main/kotlin/org/koitharu/kotatsu/core/exceptions/TooManyRequestExceptions.kt

@@ -1,13 +1,13 @@
 package org.koitharu.kotatsu.core.exceptions
 
 import okio.IOException
-import java.util.Date
+import java.time.Instant
+import java.time.temporal.ChronoUnit
 
 class TooManyRequestExceptions(
 	val url: String,
-	val retryAt: Date?,
+	val retryAt: Instant?,
 ) : IOException() {
-
 	val retryAfter: Long
-		get() = if (retryAt == null) 0 else (retryAt.time - System.currentTimeMillis()).coerceAtLeast(0)
+		get() = retryAt?.until(Instant.now(), ChronoUnit.MILLIS) ?: 0
 }

app/src/main/kotlin/org/koitharu/kotatsu/core/exceptions/UnsupportedSourceException.kt

@@ -0,0 +1,8 @@
+package org.koitharu.kotatsu.core.exceptions
+
+import org.koitharu.kotatsu.parsers.model.Manga
+
+class UnsupportedSourceException(
+	message: String?,
+	val manga: Manga?,
+) : IllegalArgumentException(message)

app/src/main/kotlin/org/koitharu/kotatsu/core/exceptions/resolve/ErrorObserver.kt

@@ -21,7 +21,7 @@ abstract class ErrorObserver(
 	private val onResolved: Consumer<Boolean>?,
 ) : FlowCollector<Throwable> {
 
-	protected val activity = host.context.findActivity()
+	protected open val activity = host.context.findActivity()
 
 	private val lifecycleScope: LifecycleCoroutineScope
 		get() = checkNotNull(fragment?.viewLifecycleScope ?: (activity as? LifecycleOwner)?.lifecycle?.coroutineScope)
@@ -36,7 +36,7 @@ abstract class ErrorObserver(
 	private fun isAlive(): Boolean {
 		return when {
 			fragment != null -> fragment.view != null
-			activity != null -> !activity.isDestroyed
+			activity != null -> activity?.isDestroyed == false
 			else -> true
 		}
 	}

app/src/main/kotlin/org/koitharu/kotatsu/core/exceptions/resolve/ExceptionResolver.kt

@@ -8,13 +8,16 @@ import androidx.fragment.app.Fragment
 import androidx.fragment.app.FragmentActivity
 import okhttp3.Headers
 import org.koitharu.kotatsu.R
+import org.koitharu.kotatsu.alternatives.ui.AlternativesActivity
 import org.koitharu.kotatsu.browser.BrowserActivity
 import org.koitharu.kotatsu.browser.cloudflare.CloudFlareActivity
 import org.koitharu.kotatsu.core.exceptions.CloudFlareProtectedException
+import org.koitharu.kotatsu.core.exceptions.UnsupportedSourceException
 import org.koitharu.kotatsu.core.ui.dialog.ErrorDetailsDialog
 import org.koitharu.kotatsu.core.util.TaggedActivityResult
 import org.koitharu.kotatsu.parsers.exception.AuthRequiredException
 import org.koitharu.kotatsu.parsers.exception.NotFoundException
+import org.koitharu.kotatsu.parsers.model.Manga
 import org.koitharu.kotatsu.parsers.model.MangaSource
 import org.koitharu.kotatsu.settings.sources.auth.SourceAuthActivity
 import kotlin.coroutines.Continuation
@@ -59,6 +62,11 @@ class ExceptionResolver : ActivityResultCallback<TaggedActivityResult> {
 			false
 		}
 
+		is UnsupportedSourceException -> {
+			e.manga?.let { openAlternatives(it) }
+			false
+		}
+
 		else -> false
 	}
 
@@ -77,6 +85,11 @@ class ExceptionResolver : ActivityResultCallback<TaggedActivityResult> {
 		context.startActivity(BrowserActivity.newIntent(context, url, null))
 	}
 
+	private fun openAlternatives(manga: Manga) {
+		val context = activity ?: fragment?.activity ?: return
+		context.startActivity(AlternativesActivity.newIntent(context, manga))
+	}
+
 	private fun getFragmentManager() = checkNotNull(fragment?.childFragmentManager ?: activity?.supportFragmentManager)
 
 	companion object {
@@ -86,6 +99,7 @@ class ExceptionResolver : ActivityResultCallback<TaggedActivityResult> {
 			is CloudFlareProtectedException -> R.string.captcha_solve
 			is AuthRequiredException -> R.string.sign_in
 			is NotFoundException -> if (e.url.isNotEmpty()) R.string.open_in_browser else 0
+			is UnsupportedSourceException -> if (e.manga != null) R.string.alternatives else 0
 			else -> 0
 		}
 

app/src/main/kotlin/org/koitharu/kotatsu/core/logs/FileLogger.kt

@@ -20,8 +20,9 @@ import org.koitharu.kotatsu.parsers.util.runCatchingCancellable
 import org.koitharu.kotatsu.core.util.ext.printStackTraceDebug
 import java.io.File
 import java.io.FileOutputStream
-import java.text.SimpleDateFormat
-import java.util.Date
+import java.time.LocalDateTime
+import java.time.format.DateTimeFormatter
+import java.time.format.FormatStyle
 import java.util.Locale
 import java.util.concurrent.ConcurrentLinkedQueue
 
@@ -41,11 +42,7 @@ class FileLogger(
 	}
 	val isEnabled: Boolean
 		get() = settings.isLoggingEnabled
-	private val dateFormat = SimpleDateFormat.getDateTimeInstance(
-		SimpleDateFormat.SHORT,
-		SimpleDateFormat.SHORT,
-		Locale.ROOT,
-	)
+	private val dateTimeFormatter = DateTimeFormatter.ofLocalizedDateTime(FormatStyle.SHORT).withLocale(Locale.ROOT)
 	private val buffer = ConcurrentLinkedQueue<String>()
 	private val mutex = Mutex()
 	private var flushJob: Job? = null
@@ -55,7 +52,7 @@ class FileLogger(
 			return
 		}
 		val text = buildString {
-			append(dateFormat.format(Date()))
+			append(dateTimeFormatter.format(LocalDateTime.now()))
 			append(": ")
 			if (e != null) {
 				append("E!")

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

@@ -5,7 +5,7 @@ import kotlinx.parcelize.Parcelize
 import org.koitharu.kotatsu.list.domain.ListSortOrder
 import org.koitharu.kotatsu.list.ui.ListModelDiffCallback
 import org.koitharu.kotatsu.list.ui.model.ListModel
-import java.util.Date
+import java.time.Instant
 
 @Parcelize
 data class FavouriteCategory(
@@ -13,7 +13,7 @@ data class FavouriteCategory(
 	val title: String,
 	val sortKey: Int,
 	val order: ListSortOrder,
-	val createdAt: Date,
+	val createdAt: Instant,
 	val isTrackingEnabled: Boolean,
 	val isVisibleInLibrary: Boolean,
 ) : Parcelable, ListModel {

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

@@ -3,15 +3,20 @@ package org.koitharu.kotatsu.core.model
 import android.net.Uri
 import androidx.annotation.DrawableRes
 import androidx.annotation.StringRes
+import androidx.collection.MutableObjectIntMap
 import androidx.core.os.LocaleListCompat
 import org.koitharu.kotatsu.R
 import org.koitharu.kotatsu.core.util.ext.iterator
 import org.koitharu.kotatsu.details.ui.model.ChapterListItem
+import org.koitharu.kotatsu.parsers.model.ContentRating
 import org.koitharu.kotatsu.parsers.model.Manga
 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")
 fun Collection<Manga>.ids() = mapToSet { it.id }
@@ -27,12 +32,14 @@ fun Collection<ChapterListItem>.countChaptersByBranch(): Int {
 	if (size <= 1) {
 		return size
 	}
-	val acc = HashMap<String?, Int>()
+	val acc = MutableObjectIntMap<String?>()
 	for (item in this) {
 		val branch = item.chapter.branch
-		acc[branch] = (acc[branch] ?: 0) + 1
+		acc[branch] = acc.getOrDefault(branch, 0) + 1
 	}
-	return acc.values.max()
+	var max = 0
+	acc.forEachValue { x -> if (x > max) max = x }
+	return max
 }
 
 @get:StringRes
@@ -42,15 +49,25 @@ val MangaState.titleResId: Int
 		MangaState.FINISHED -> R.string.state_finished
 		MangaState.ABANDONED -> R.string.state_abandoned
 		MangaState.PAUSED -> R.string.state_paused
+		MangaState.UPCOMING -> R.string.state_upcoming
 	}
 
 @get:DrawableRes
 val MangaState.iconResId: Int
 	get() = when (this) {
-		MangaState.ONGOING -> R.drawable.ic_state_ongoing
+		MangaState.ONGOING -> R.drawable.ic_play
 		MangaState.FINISHED -> R.drawable.ic_state_finished
 		MangaState.ABANDONED -> R.drawable.ic_state_abandoned
 		MangaState.PAUSED -> R.drawable.ic_action_pause
+		MangaState.UPCOMING -> materialR.drawable.ic_clock_black_24dp
+	}
+
+@get:StringRes
+val ContentRating.titleResId: Int
+	get() = when (this) {
+		ContentRating.SAFE -> R.string.rating_safe
+		ContentRating.SUGGESTIVE -> R.string.rating_suggestive
+		ContentRating.ADULT -> R.string.rating_adult
 	}
 
 fun Manga.findChapter(id: Long): MangaChapter? {
@@ -101,3 +118,32 @@ 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())
+}
+
+fun Manga.chaptersCount(): Int {
+	if (chapters.isNullOrEmpty()) {
+		return 0
+	}
+	val counters = MutableObjectIntMap<String?>()
+	var max = 0
+	chapters?.forEach { x ->
+		val c = counters.getOrDefault(x.branch, 0) + 1
+		counters[x.branch] = c
+		if (max < c) {
+			max = c
+		}
+	}
+	return max
+}

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

@@ -2,14 +2,14 @@ package org.koitharu.kotatsu.core.model
 
 import android.os.Parcelable
 import kotlinx.parcelize.Parcelize
-import java.util.*
+import java.time.Instant
 
 @Parcelize
 data class MangaHistory(
-	val createdAt: Date,
-	val updatedAt: Date,
+	val createdAt: Instant,
+	val updatedAt: Instant,
 	val chapterId: Long,
 	val page: Int,
 	val scroll: Int,
 	val percent: Float,
-) : Parcelable
+) : Parcelable

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

@@ -1,17 +1,23 @@
 package org.koitharu.kotatsu.core.model
 
 import android.content.Context
+import android.graphics.Color
+import android.text.SpannableStringBuilder
+import android.text.style.ForegroundColorSpan
+import android.text.style.RelativeSizeSpan
+import android.text.style.SuperscriptSpan
 import androidx.annotation.StringRes
+import androidx.core.text.buildSpannedString
+import androidx.core.text.inSpans
 import org.koitharu.kotatsu.R
+import org.koitharu.kotatsu.core.util.ext.getDisplayName
+import org.koitharu.kotatsu.core.util.ext.getThemeColor
+import org.koitharu.kotatsu.core.util.ext.toLocale
 import org.koitharu.kotatsu.parsers.model.ContentType
 import org.koitharu.kotatsu.parsers.model.MangaSource
 import org.koitharu.kotatsu.parsers.util.toTitleCase
 import java.util.Locale
-
-fun MangaSource.getLocaleTitle(): String? {
-	val lc = Locale(locale ?: return null)
-	return lc.getDisplayLanguage(lc).toTitleCase(lc)
-}
+import com.google.android.material.R as materialR
 
 fun MangaSource(name: String): MangaSource {
 	MangaSource.entries.forEach {
@@ -33,6 +39,24 @@ val ContentType.titleResId
 
 fun MangaSource.getSummary(context: Context): String {
 	val type = context.getString(contentType.titleResId)
-	val locale = getLocaleTitle() ?: context.getString(R.string.various_languages)
+	val locale = locale?.toLocale().getDisplayName(context)
 	return context.getString(R.string.source_summary_pattern, type, locale)
 }
+
+fun MangaSource.getTitle(context: Context): CharSequence = if (isNsfw()) {
+	buildSpannedString {
+		append(title)
+		append(' ')
+		appendNsfwLabel(context)
+	}
+} else {
+	title
+}
+
+private fun SpannableStringBuilder.appendNsfwLabel(context: Context) = inSpans(
+	ForegroundColorSpan(context.getThemeColor(materialR.attr.colorError, Color.RED)),
+	RelativeSizeSpan(0.74f),
+	SuperscriptSpan(),
+) {
+	append(context.getString(R.string.nsfw))
+}

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/network/CommonHeadersInterceptor.kt

@@ -7,11 +7,11 @@ import okhttp3.Interceptor
 import okhttp3.Request
 import okhttp3.Response
 import org.koitharu.kotatsu.BuildConfig
+import org.koitharu.kotatsu.core.parser.MangaLoaderContextImpl
 import org.koitharu.kotatsu.core.parser.MangaRepository
 import org.koitharu.kotatsu.core.parser.RemoteMangaRepository
 import org.koitharu.kotatsu.core.util.ext.printStackTraceDebug
 import org.koitharu.kotatsu.parsers.model.MangaSource
-import org.koitharu.kotatsu.parsers.network.UserAgents
 import org.koitharu.kotatsu.parsers.util.mergeWith
 import java.net.IDN
 import javax.inject.Inject
@@ -20,6 +20,7 @@ import javax.inject.Singleton
 @Singleton
 class CommonHeadersInterceptor @Inject constructor(
 	private val mangaRepositoryFactoryLazy: Lazy<MangaRepository.Factory>,
+	private val mangaLoaderContextLazy: Lazy<MangaLoaderContextImpl>,
 ) : Interceptor {
 
 	override fun intercept(chain: Interceptor.Chain): Response {
@@ -38,7 +39,7 @@ class CommonHeadersInterceptor @Inject constructor(
 			headersBuilder.mergeWith(it, replaceExisting = false)
 		}
 		if (headersBuilder[CommonHeaders.USER_AGENT] == null) {
-			headersBuilder[CommonHeaders.USER_AGENT] = UserAgents.CHROME_MOBILE
+			headersBuilder[CommonHeaders.USER_AGENT] = mangaLoaderContextLazy.get().getDefaultUserAgent()
 		}
 		if (headersBuilder[CommonHeaders.REFERER] == null && repository != null) {
 			val idn = IDN.toASCII(repository.domain)

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

@@ -7,6 +7,7 @@ import coil.request.ErrorResult
 import coil.request.ImageResult
 import coil.request.SuccessResult
 import coil.size.Dimension
+import coil.size.isOriginal
 import okhttp3.HttpUrl
 import okhttp3.HttpUrl.Companion.toHttpUrlOrNull
 import okhttp3.OkHttpClient
@@ -46,11 +47,13 @@ class ImageProxyInterceptor @Inject constructor(
 			.scheme("https")
 			.host("wsrv.nl")
 			.addQueryParameter("url", url.toString())
-			.addQueryParameter("fit", "outside")
 			.addQueryParameter("we", null)
 		val size = request.sizeResolver.size()
-		(size.height as? Dimension.Pixels)?.let { newUrl.addQueryParameter("h", it.toString()) }
-		(size.width as? Dimension.Pixels)?.let { newUrl.addQueryParameter("w", it.toString()) }
+		if (!size.isOriginal) {
+			newUrl.addQueryParameter("crop", "cover")
+			(size.height as? Dimension.Pixels)?.let { newUrl.addQueryParameter("h", it.toString()) }
+			(size.width as? Dimension.Pixels)?.let { newUrl.addQueryParameter("w", it.toString()) }
+		}
 
 		val newRequest = request.newBuilder()
 			.data(newUrl.build())

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

@@ -4,15 +4,11 @@ import okhttp3.Interceptor
 import okhttp3.Response
 import okhttp3.internal.closeQuietly
 import org.koitharu.kotatsu.core.exceptions.TooManyRequestExceptions
-import java.text.SimpleDateFormat
-import java.util.Date
-import java.util.Locale
-import java.util.concurrent.TimeUnit
+import java.time.Instant
+import java.time.ZonedDateTime
+import java.time.format.DateTimeFormatter
 
 class RateLimitInterceptor : Interceptor {
-
-	private val dateFormat = SimpleDateFormat("EEE, dd MMM yyyy HH:mm:ss ZZZ", Locale.ENGLISH)
-
 	override fun intercept(chain: Interceptor.Chain): Response {
 		val response = chain.proceed(chain.request())
 		if (response.code == 429) {
@@ -27,10 +23,8 @@ class RateLimitInterceptor : Interceptor {
 		return response
 	}
 
-	private fun String.parseRetryDate(): Date? {
-		toIntOrNull()?.let {
-			return Date(System.currentTimeMillis() + TimeUnit.SECONDS.toMillis(it.toLong()))
-		}
-		return dateFormat.parse(this)
+	private fun String.parseRetryDate(): Instant? {
+		return toLongOrNull()?.let { Instant.now().plusSeconds(it) }
+			?: ZonedDateTime.parse(this, DateTimeFormatter.RFC_1123_DATE_TIME).toInstant()
 	}
 }

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.hexToByteArray() 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/parser/DummyParser.kt

@@ -1,5 +1,6 @@
 package org.koitharu.kotatsu.core.parser
 
+import org.koitharu.kotatsu.core.exceptions.UnsupportedSourceException
 import org.koitharu.kotatsu.parsers.MangaLoaderContext
 import org.koitharu.kotatsu.parsers.MangaParser
 import org.koitharu.kotatsu.parsers.config.ConfigKey
@@ -18,24 +19,20 @@ import java.util.EnumSet
 class DummyParser(context: MangaLoaderContext) : MangaParser(context, MangaSource.DUMMY) {
 
 	override val configKeyDomain: ConfigKey.Domain
-		get() = ConfigKey.Domain("")
+		get() = ConfigKey.Domain("localhost")
 
 	override val availableSortOrders: Set<SortOrder>
 		get() = EnumSet.allOf(SortOrder::class.java)
 
-	override suspend fun getDetails(manga: Manga): Manga {
-		TODO("Not yet implemented")
-	}
+	override suspend fun getDetails(manga: Manga): Manga = stub(manga)
 
-	override suspend fun getList(offset: Int, filter: MangaListFilter?): List<Manga> {
-		TODO("Not yet implemented")
-	}
+	override suspend fun getList(offset: Int, filter: MangaListFilter?): List<Manga> = stub(null)
 
-	override suspend fun getPages(chapter: MangaChapter): List<MangaPage> {
-		TODO("Not yet implemented")
-	}
+	override suspend fun getPages(chapter: MangaChapter): List<MangaPage> = stub(null)
 
-	override suspend fun getAvailableTags(): Set<MangaTag> {
-		TODO("Not yet implemented")
+	override suspend fun getAvailableTags(): Set<MangaTag> = stub(null)
+
+	private fun stub(manga: Manga?): Nothing {
+		throw UnsupportedSourceException("Usage of Dummy parser", manga)
 	}
 }

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

@@ -4,18 +4,25 @@ import android.annotation.SuppressLint
 import android.content.Context
 import android.util.Base64
 import android.webkit.WebView
+import androidx.annotation.MainThread
 import androidx.core.os.LocaleListCompat
 import dagger.hilt.android.qualifiers.ApplicationContext
 import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.runBlocking
 import kotlinx.coroutines.withContext
 import okhttp3.OkHttpClient
 import org.koitharu.kotatsu.core.network.MangaHttpClient
 import org.koitharu.kotatsu.core.network.cookies.MutableCookieJar
 import org.koitharu.kotatsu.core.prefs.SourceSettings
+import org.koitharu.kotatsu.core.util.ext.configureForParser
+import org.koitharu.kotatsu.core.util.ext.printStackTraceDebug
+import org.koitharu.kotatsu.core.util.ext.sanitizeHeaderValue
 import org.koitharu.kotatsu.core.util.ext.toList
 import org.koitharu.kotatsu.parsers.MangaLoaderContext
 import org.koitharu.kotatsu.parsers.config.MangaSourceConfig
 import org.koitharu.kotatsu.parsers.model.MangaSource
+import org.koitharu.kotatsu.parsers.network.UserAgents
+import org.koitharu.kotatsu.parsers.util.SuspendLazy
 import java.lang.ref.WeakReference
 import java.util.Locale
 import javax.inject.Inject
@@ -32,12 +39,15 @@ class MangaLoaderContextImpl @Inject constructor(
 
 	private var webViewCached: WeakReference<WebView>? = null
 
+	private val userAgentLazy = SuspendLazy {
+		withContext(Dispatchers.Main) {
+			obtainWebView().settings.userAgentString
+		}.sanitizeHeaderValue()
+	}
+
 	@SuppressLint("SetJavaScriptEnabled")
 	override suspend fun evaluateJs(script: String): String? = withContext(Dispatchers.Main) {
-		val webView = webViewCached?.get() ?: WebView(androidContext).also {
-			it.settings.javaScriptEnabled = true
-			webViewCached = WeakReference(it)
-		}
+		val webView = obtainWebView()
 		suspendCoroutine { cont ->
 			webView.evaluateJavascript(script) { result ->
 				cont.resume(result?.takeUnless { it == "null" })
@@ -45,6 +55,14 @@ class MangaLoaderContextImpl @Inject constructor(
 		}
 	}
 
+	override fun getDefaultUserAgent(): String = runCatching {
+		runBlocking {
+			userAgentLazy.get()
+		}
+	}.onFailure { e ->
+		e.printStackTraceDebug()
+	}.getOrDefault(UserAgents.FIREFOX_MOBILE)
+
 	override fun getConfig(source: MangaSource): MangaSourceConfig {
 		return SourceSettings(androidContext, source)
 	}
@@ -60,4 +78,12 @@ class MangaLoaderContextImpl @Inject constructor(
 	override fun getPreferredLocales(): List<Locale> {
 		return LocaleListCompat.getAdjustedDefault().toList()
 	}
+
+	@MainThread
+	private fun obtainWebView(): WebView {
+		return webViewCached?.get() ?: WebView(androidContext).also {
+			it.configureForParser(null)
+			webViewCached = WeakReference(it)
+		}
+	}
 }

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

@@ -5,6 +5,7 @@ import org.koitharu.kotatsu.core.cache.ContentCache
 import org.koitharu.kotatsu.core.network.MirrorSwitchInterceptor
 import org.koitharu.kotatsu.local.data.LocalMangaRepository
 import org.koitharu.kotatsu.parsers.MangaLoaderContext
+import org.koitharu.kotatsu.parsers.model.ContentRating
 import org.koitharu.kotatsu.parsers.model.Manga
 import org.koitharu.kotatsu.parsers.model.MangaChapter
 import org.koitharu.kotatsu.parsers.model.MangaListFilter
@@ -28,10 +29,16 @@ interface MangaRepository {
 
 	val states: Set<MangaState>
 
+	val contentRatings: Set<ContentRating>
+
 	var defaultSortOrder: SortOrder
 
 	val isMultipleTagsSupported: Boolean
 
+	val isTagsExclusionSupported: Boolean
+
+	val isSearchSupported: Boolean
+
 	suspend fun getList(offset: Int, filter: MangaListFilter?): List<Manga>
 
 	suspend fun getDetails(manga: Manga): Manga

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

@@ -1,6 +1,7 @@
 package org.koitharu.kotatsu.core.parser
 
 import android.util.Log
+import androidx.collection.MutableLongSet
 import coil.request.CachePolicy
 import kotlinx.coroutines.CoroutineDispatcher
 import kotlinx.coroutines.CoroutineScope
@@ -21,6 +22,7 @@ import org.koitharu.kotatsu.parsers.MangaParser
 import org.koitharu.kotatsu.parsers.MangaParserAuthProvider
 import org.koitharu.kotatsu.parsers.config.ConfigKey
 import org.koitharu.kotatsu.parsers.exception.ParseException
+import org.koitharu.kotatsu.parsers.model.ContentRating
 import org.koitharu.kotatsu.parsers.model.Favicons
 import org.koitharu.kotatsu.parsers.model.Manga
 import org.koitharu.kotatsu.parsers.model.MangaChapter
@@ -49,6 +51,9 @@ class RemoteMangaRepository(
 	override val states: Set<MangaState>
 		get() = parser.availableStates
 
+	override val contentRatings: Set<ContentRating>
+		get() = parser.availableContentRating
+
 	override var defaultSortOrder: SortOrder
 		get() = getConfig().defaultSortOrder ?: sortOrders.first()
 		set(value) {
@@ -58,6 +63,12 @@ class RemoteMangaRepository(
 	override val isMultipleTagsSupported: Boolean
 		get() = parser.isMultipleTagsSupported
 
+	override val isSearchSupported: Boolean
+		get() = parser.isSearchSupported
+
+	override val isTagsExclusionSupported: Boolean
+		get() = parser.isTagsExclusionSupported
+
 	var domain: String
 		get() = parser.domain
 		set(value) {
@@ -160,7 +171,11 @@ class RemoteMangaRepository(
 		return getConfig().isSlowdownEnabled
 	}
 
-	private fun getConfig() = parser.config as SourceSettings
+	fun invalidateCache() {
+		cache.clear(source)
+	}
+
+	fun getConfig() = parser.config as SourceSettings
 
 	private suspend fun <T> asyncSafe(block: suspend CoroutineScope.() -> T): SafeDeferred<T> {
 		var dispatcher = currentCoroutineContext()[CoroutineDispatcher.Key]
@@ -179,7 +194,7 @@ class RemoteMangaRepository(
 			return emptyList()
 		}
 		val result = ArrayList<MangaPage>(size)
-		val set = HashSet<Long>(size)
+		val set = MutableLongSet(size)
 		for (page in this) {
 			if (set.add(page.id)) {
 				result.add(page)
@@ -216,6 +231,5 @@ class RemoteMangaRepository(
 		}
 	}
 
-	private fun Result<*>.isValidResult() = exceptionOrNull() !is ParseException
-		&& (getOrNull() as? Collection<*>)?.isEmpty() != true
+	private fun Result<*>.isValidResult() = isSuccess && (getOrNull() as? Collection<*>)?.isEmpty() != true
 }

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

@@ -11,6 +11,7 @@ import androidx.appcompat.app.AppCompatDelegate
 import androidx.collection.ArraySet
 import androidx.core.content.edit
 import androidx.core.os.LocaleListCompat
+import androidx.documentfile.provider.DocumentFile
 import androidx.preference.PreferenceManager
 import dagger.hilt.android.qualifiers.ApplicationContext
 import org.json.JSONArray
@@ -70,6 +71,9 @@ class AppSettings @Inject constructor(@ApplicationContext context: Context) {
 			}
 		}
 
+	val isNavLabelsVisible: Boolean
+		get() = prefs.getBoolean(KEY_NAV_LABELS, true)
+
 	var gridSize: Int
 		get() = prefs.getInt(KEY_GRID_SIZE, 100)
 		set(value) = prefs.edit { putInt(KEY_GRID_SIZE, value) }
@@ -101,14 +105,21 @@ class AppSettings @Inject constructor(@ApplicationContext context: Context) {
 			}
 		}
 
-	val readerPageSwitch: Set<String>
-		get() = prefs.getStringSet(KEY_READER_SWITCHERS, null) ?: setOf(PAGE_SWITCH_TAPS)
+	var isReaderDoubleOnLandscape: Boolean
+		get() = prefs.getBoolean(KEY_READER_DOUBLE_PAGES, false)
+		set(value) = prefs.edit { putBoolean(KEY_READER_DOUBLE_PAGES, value) }
+
+	val isReaderVolumeButtonsEnabled: Boolean
+		get() = prefs.getBoolean(KEY_READER_VOLUME_BUTTONS, false)
 
 	val isReaderZoomButtonsEnabled: Boolean
 		get() = prefs.getBoolean(KEY_READER_ZOOM_BUTTONS, false)
 
-	val isReaderTapsAdaptive: Boolean
-		get() = !prefs.getBoolean(KEY_READER_TAPS_LTR, false)
+	val isReaderControlAlwaysLTR: Boolean
+		get() = prefs.getBoolean(KEY_READER_CONTROL_LTR, false)
+
+	val isReaderFullscreenEnabled: Boolean
+		get() = prefs.getBoolean(KEY_READER_FULLSCREEN, true)
 
 	val isReaderOptimizationEnabled: Boolean
 		get() = prefs.getBoolean(KEY_READER_OPTIMIZE, false)
@@ -167,10 +178,14 @@ class AppSettings @Inject constructor(@ApplicationContext context: Context) {
 		get() = prefs.getBoolean(KEY_INCOGNITO_MODE, false)
 		set(value) = prefs.edit { putBoolean(KEY_INCOGNITO_MODE, value) }
 
-	var chaptersReverse: Boolean
+	var isChaptersReverse: Boolean
 		get() = prefs.getBoolean(KEY_REVERSE_CHAPTERS, false)
 		set(value) = prefs.edit { putBoolean(KEY_REVERSE_CHAPTERS, value) }
 
+	var isChaptersGridView: Boolean
+		get() = prefs.getBoolean(KEY_GRID_VIEW_CHAPTERS, false)
+		set(value) = prefs.edit { putBoolean(KEY_GRID_VIEW_CHAPTERS, value) }
+
 	val zoomMode: ZoomMode
 		get() = prefs.getEnumValue(KEY_ZOOM_MODE, ZoomMode.FIT_CENTER)
 
@@ -180,11 +195,13 @@ class AppSettings @Inject constructor(@ApplicationContext context: Context) {
 	var appPassword: String?
 		get() = prefs.getString(KEY_APP_PASSWORD, null)
 		set(value) = prefs.edit {
-			if (value != null) putString(KEY_APP_PASSWORD, value) else remove(
-				KEY_APP_PASSWORD,
-			)
+			if (value != null) putString(KEY_APP_PASSWORD, value) else remove(KEY_APP_PASSWORD)
 		}
 
+	var isAppPasswordNumeric: Boolean
+		get() = prefs.getBoolean(KEY_APP_PASSWORD_NUMERIC, false)
+		set(value) = prefs.edit { putBoolean(KEY_APP_PASSWORD_NUMERIC, value) }
+
 	val isLoggingEnabled: Boolean
 		get() = prefs.getBoolean(KEY_LOGGING_ENABLED, false)
 
@@ -204,6 +221,16 @@ class AppSettings @Inject constructor(@ApplicationContext context: Context) {
 	val isUnstableUpdatesAllowed: Boolean
 		get() = prefs.getBoolean(KEY_UPDATES_UNSTABLE, false)
 
+	val isPagesTabEnabled: Boolean
+		get() = prefs.getBoolean(KEY_PAGES_TAB, true)
+
+	val defaultDetailsTab: Int
+		get() = if (isPagesTabEnabled) {
+			prefs.getString(KEY_DETAILS_TAB, null)?.toIntOrNull()?.coerceIn(0, 1) ?: 0
+		} else {
+			0
+		}
+
 	val isContentPrefetchEnabled: Boolean
 		get() {
 			if (isBackgroundNetworkRestricted()) {
@@ -263,6 +290,9 @@ class AppSettings @Inject constructor(@ApplicationContext context: Context) {
 	val isDownloadsWiFiOnly: Boolean
 		get() = prefs.getBoolean(KEY_DOWNLOADS_WIFI, false)
 
+	val preferredDownloadFormat: DownloadFormat
+		get() = prefs.getEnumValue(KEY_DOWNLOADS_FORMAT, DownloadFormat.AUTOMATIC)
+
 	var isSuggestionsEnabled: Boolean
 		get() = prefs.getBoolean(KEY_SUGGESTIONS, false)
 		set(value) = prefs.edit { putBoolean(KEY_SUGGESTIONS, value) }
@@ -295,13 +325,13 @@ class AppSettings @Inject constructor(@ApplicationContext context: Context) {
 		get() = prefs.getBoolean(KEY_READER_SCREEN_ON, true)
 
 	var readerColorFilter: ReaderColorFilter?
-		get() {
+		get() = runCatching {
 			val brightness = prefs.getFloat(KEY_CF_BRIGHTNESS, ReaderColorFilter.EMPTY.brightness)
 			val contrast = prefs.getFloat(KEY_CF_CONTRAST, ReaderColorFilter.EMPTY.contrast)
 			val inverted = prefs.getBoolean(KEY_CF_INVERTED, ReaderColorFilter.EMPTY.isInverted)
 			val grayscale = prefs.getBoolean(KEY_CF_GRAYSCALE, ReaderColorFilter.EMPTY.isGrayscale)
-			return ReaderColorFilter(brightness, contrast, inverted, grayscale).takeUnless { it.isEmpty }
-		}
+			ReaderColorFilter(brightness, contrast, inverted, grayscale).takeUnless { it.isEmpty }
+		}.getOrNull()
 		set(value) {
 			prefs.edit {
 				val cf = value ?: ReaderColorFilter.EMPTY
@@ -344,15 +374,23 @@ 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)
 
 	val isWebtoonZoomEnable: Boolean
 		get() = prefs.getBoolean(KEY_WEBTOON_ZOOM, true)
 
+	@get:FloatRange(from = 0.0, to = 0.5)
+	val defaultWebtoonZoomOut: Float
+		get() = prefs.getInt(KEY_WEBTOON_ZOOM_OUT, 0).coerceIn(0, 50) / 100f
+
 	@get:FloatRange(from = 0.0, to = 1.0)
 	var readerAutoscrollSpeed: Float
 		get() = prefs.getFloat(KEY_READER_AUTOSCROLL_SPEED, 0f)
@@ -388,6 +426,18 @@ class AppSettings @Inject constructor(@ApplicationContext context: Context) {
 		get() = prefs.getString(KEY_BACKUP_PERIODICAL_OUTPUT, null)?.toUriOrNull()
 		set(value) = prefs.edit { putString(KEY_BACKUP_PERIODICAL_OUTPUT, value?.toString()) }
 
+	val isReadingTimeEstimationEnabled: Boolean
+		get() = prefs.getBoolean(KEY_READING_TIME, true)
+
+	val isPagesSavingAskEnabled: Boolean
+		get() = prefs.getBoolean(KEY_PAGES_SAVE_ASK, true)
+
+	val isStatsEnabled: Boolean
+		get() = prefs.getBoolean(KEY_STATS_ENABLED, false)
+
+	val isAutoLocalChaptersCleanupEnabled: Boolean
+		get() = prefs.getBoolean(KEY_CHAPTERS_CLEAR_AUTO, false)
+
 	fun isTipEnabled(tip: String): Boolean {
 		return prefs.getStringSet(KEY_TIPS_CLOSED, emptySet())?.contains(tip) != true
 	}
@@ -400,6 +450,15 @@ class AppSettings @Inject constructor(@ApplicationContext context: Context) {
 		prefs.edit { putStringSet(KEY_TIPS_CLOSED, closedTips + tip) }
 	}
 
+	fun getPagesSaveDir(context: Context): DocumentFile? =
+		prefs.getString(KEY_PAGES_SAVE_DIR, null)?.toUriOrNull()?.let {
+			DocumentFile.fromTreeUri(context, it)?.takeIf { it.canWrite() }
+		}
+
+	fun setPagesSaveDir(uri: Uri?) {
+		prefs.edit { putString(KEY_PAGES_SAVE_DIR, uri?.toString()) }
+	}
+
 	fun subscribe(listener: SharedPreferences.OnSharedPreferenceChangeListener) {
 		prefs.registerOnSharedPreferenceChangeListener(listener)
 	}
@@ -446,7 +505,6 @@ class AppSettings @Inject constructor(@ApplicationContext context: Context) {
 
 	companion object {
 
-		const val PAGE_SWITCH_TAPS = "taps"
 		const val PAGE_SWITCH_VOLUME_KEYS = "volume"
 
 		const val TRACK_HISTORY = "history"
@@ -463,14 +521,19 @@ class AppSettings @Inject constructor(@ApplicationContext context: Context) {
 		const val KEY_PAGES_CACHE_CLEAR = "pages_cache_clear"
 		const val KEY_HTTP_CACHE_CLEAR = "http_cache_clear"
 		const val KEY_COOKIES_CLEAR = "cookies_clear"
+		const val KEY_CHAPTERS_CLEAR = "chapters_clear"
+		const val KEY_CHAPTERS_CLEAR_AUTO = "chapters_clear_auto"
 		const val KEY_THUMBS_CACHE_CLEAR = "thumbs_cache_clear"
 		const val KEY_SEARCH_HISTORY_CLEAR = "search_history_clear"
 		const val KEY_UPDATES_FEED_CLEAR = "updates_feed_clear"
 		const val KEY_GRID_SIZE = "grid_size"
 		const val KEY_REMOTE_SOURCES = "remote_sources"
 		const val KEY_LOCAL_STORAGE = "local_storage"
-		const val KEY_READER_SWITCHERS = "reader_switchers"
+		const val KEY_READER_DOUBLE_PAGES = "reader_double_pages"
 		const val KEY_READER_ZOOM_BUTTONS = "reader_zoom_buttons"
+		const val KEY_READER_CONTROL_LTR = "reader_taps_ltr"
+		const val KEY_READER_FULLSCREEN = "reader_fullscreen"
+		const val KEY_READER_VOLUME_BUTTONS = "reader_volume_buttons"
 		const val KEY_TRACKER_ENABLED = "tracker_enabled"
 		const val KEY_TRACKER_WIFI_ONLY = "tracker_wifi"
 		const val KEY_TRACK_SOURCES = "track_sources"
@@ -486,6 +549,7 @@ class AppSettings @Inject constructor(@ApplicationContext context: Context) {
 		const val KEY_READER_MODE = "reader_mode"
 		const val KEY_READER_MODE_DETECT = "reader_mode_detect"
 		const val KEY_APP_PASSWORD = "app_password"
+		const val KEY_APP_PASSWORD_NUMERIC = "app_password_num"
 		const val KEY_PROTECT_APP = "protect_app"
 		const val KEY_PROTECT_APP_BIOMETRIC = "protect_app_bio"
 		const val KEY_APP_VERSION = "app_version"
@@ -499,6 +563,7 @@ class AppSettings @Inject constructor(@ApplicationContext context: Context) {
 		const val KEY_HISTORY_GROUPING = "history_grouping"
 		const val KEY_READING_INDICATORS = "reading_indicators"
 		const val KEY_REVERSE_CHAPTERS = "reverse_chapters"
+		const val KEY_GRID_VIEW_CHAPTERS = "grid_view_chapters"
 		const val KEY_HISTORY_EXCLUDE_NSFW = "history_exclude_nsfw"
 		const val KEY_PAGES_NUMBERS = "pages_numbers"
 		const val KEY_SCREENSHOTS_POLICY = "screenshots_policy"
@@ -511,7 +576,9 @@ class AppSettings @Inject constructor(@ApplicationContext context: Context) {
 		const val KEY_SHIKIMORI = "shikimori"
 		const val KEY_ANILIST = "anilist"
 		const val KEY_MAL = "mal"
+		const val KEY_KITSU = "kitsu"
 		const val KEY_DOWNLOADS_WIFI = "downloads_wifi"
+		const val KEY_DOWNLOADS_FORMAT = "downloads_format"
 		const val KEY_ALL_FAVOURITES_VISIBLE = "all_favourites_visible"
 		const val KEY_DOH = "doh"
 		const val KEY_EXIT_CONFIRM = "exit_confirm"
@@ -523,11 +590,13 @@ class AppSettings @Inject constructor(@ApplicationContext context: Context) {
 		const val KEY_READER_BACKGROUND = "reader_background"
 		const val KEY_READER_SCREEN_ON = "reader_screen_on"
 		const val KEY_SHORTCUTS = "dynamic_shortcuts"
-		const val KEY_READER_TAPS_LTR = "reader_taps_ltr"
+		const val KEY_READER_TAP_ACTIONS = "reader_tap_actions"
 		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_WEBTOON_ZOOM_OUT = "webtoon_zoom_out"
 		const val KEY_PREFETCH_CONTENT = "prefetch_content"
 		const val KEY_APP_LOCALE = "app_locale"
 		const val KEY_LOGGING_ENABLED = "logging"
@@ -551,6 +620,7 @@ class AppSettings @Inject constructor(@ApplicationContext context: Context) {
 		const val KEY_DISABLE_NSFW = "no_nsfw"
 		const val KEY_RELATED_MANGA = "related_manga"
 		const val KEY_NAV_MAIN = "nav_main"
+		const val KEY_NAV_LABELS = "nav_labels"
 		const val KEY_32BIT_COLOR = "enhanced_colors"
 		const val KEY_SOURCES_ORDER = "sources_sort_order"
 		const val KEY_SOURCES_CATALOG = "sources_catalog"
@@ -559,8 +629,12 @@ class AppSettings @Inject constructor(@ApplicationContext context: Context) {
 		const val KEY_CF_INVERTED = "cf_inverted"
 		const val KEY_CF_GRAYSCALE = "cf_grayscale"
 		const val KEY_IGNORE_DOZE = "ignore_dose"
-
-		// About
+		const val KEY_PAGES_TAB = "pages_tab"
+		const val KEY_DETAILS_TAB = "details_tab"
+		const val KEY_READING_TIME = "reading_time"
+		const val KEY_PAGES_SAVE_DIR = "pages_dir"
+		const val KEY_PAGES_SAVE_ASK = "pages_dir_ask"
+		const val KEY_STATS_ENABLED = "stats_on"
 		const val KEY_APP_UPDATE = "app_update"
 		const val KEY_APP_TRANSLATION = "about_app_translation"
 	}

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

@@ -0,0 +1,8 @@
+package org.koitharu.kotatsu.core.prefs
+
+enum class DownloadFormat {
+
+	AUTOMATIC,
+	SINGLE_CBZ,
+	MULTIPLE_CBZ,
+}

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

@@ -4,13 +4,12 @@ import androidx.annotation.DrawableRes
 import androidx.annotation.IdRes
 import androidx.annotation.StringRes
 import org.koitharu.kotatsu.R
-import org.koitharu.kotatsu.list.ui.model.ListModel
 
 enum class NavItem(
 	@IdRes val id: Int,
 	@StringRes val title: Int,
 	@DrawableRes val icon: Int,
-) : ListModel {
+) {
 
 	HISTORY(R.id.nav_history, R.string.history, R.drawable.ic_history_selector),
 	FAVORITES(R.id.nav_favorites, R.string.favourites, R.drawable.ic_favourites_selector),
@@ -21,10 +20,6 @@ enum class NavItem(
 	BOOKMARKS(R.id.nav_bookmarks, R.string.bookmarks, R.drawable.ic_bookmark_selector),
 	;
 
-	override fun areItemsTheSame(other: ListModel): Boolean {
-		return other is NavItem && ordinal == other.ordinal
-	}
-
 	fun isAvailable(settings: AppSettings): Boolean = when (this) {
 		SUGGESTIONS -> settings.isSuggestionsEnabled
 		FEED -> settings.isTrackerEnabled

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/prefs/SourceSettings.kt

@@ -1,18 +1,18 @@
 package org.koitharu.kotatsu.core.prefs
 
 import android.content.Context
+import android.content.SharedPreferences.OnSharedPreferenceChangeListener
 import androidx.core.content.edit
+import okhttp3.internal.isSensitiveHeader
 import org.koitharu.kotatsu.core.util.ext.getEnumValue
 import org.koitharu.kotatsu.core.util.ext.ifNullOrEmpty
 import org.koitharu.kotatsu.core.util.ext.putEnumValue
+import org.koitharu.kotatsu.core.util.ext.sanitizeHeaderValue
 import org.koitharu.kotatsu.parsers.config.ConfigKey
 import org.koitharu.kotatsu.parsers.config.MangaSourceConfig
 import org.koitharu.kotatsu.parsers.model.MangaSource
 import org.koitharu.kotatsu.parsers.model.SortOrder
 
-private const val KEY_SORT_ORDER = "sort_order"
-private const val KEY_SLOWDOWN = "slowdown"
-
 class SourceSettings(context: Context, source: MangaSource) : MangaSourceConfig {
 
 	private val prefs = context.getSharedPreferences(source.name, Context.MODE_PRIVATE)
@@ -27,9 +27,13 @@ class SourceSettings(context: Context, source: MangaSource) : MangaSourceConfig
 	@Suppress("UNCHECKED_CAST")
 	override fun <T> get(key: ConfigKey<T>): T {
 		return when (key) {
-			is ConfigKey.UserAgent -> prefs.getString(key.key, key.defaultValue).ifNullOrEmpty { key.defaultValue }
+			is ConfigKey.UserAgent -> prefs.getString(key.key, key.defaultValue)
+				.ifNullOrEmpty { key.defaultValue }
+				.sanitizeHeaderValue()
+
 			is ConfigKey.Domain -> prefs.getString(key.key, key.defaultValue).ifNullOrEmpty { key.defaultValue }
 			is ConfigKey.ShowSuspiciousContent -> prefs.getBoolean(key.key, key.defaultValue)
+			is ConfigKey.SplitByTranslations -> prefs.getBoolean(key.key, key.defaultValue)
 		} as T
 	}
 
@@ -37,7 +41,22 @@ class SourceSettings(context: Context, source: MangaSource) : MangaSourceConfig
 		when (key) {
 			is ConfigKey.Domain -> putString(key.key, value as String?)
 			is ConfigKey.ShowSuspiciousContent -> putBoolean(key.key, value as Boolean)
-			is ConfigKey.UserAgent -> putString(key.key, value as String?)
+			is ConfigKey.UserAgent -> putString(key.key, (value as String?)?.sanitizeHeaderValue())
+			is ConfigKey.SplitByTranslations -> putBoolean(key.key, value as Boolean)
 		}
 	}
+
+	fun subscribe(listener: OnSharedPreferenceChangeListener) {
+		prefs.registerOnSharedPreferenceChangeListener(listener)
+	}
+
+	fun unsubscribe(listener: OnSharedPreferenceChangeListener) {
+		prefs.unregisterOnSharedPreferenceChangeListener(listener)
+	}
+
+	companion object {
+
+		const val KEY_SORT_ORDER = "sort_order"
+		const val KEY_SLOWDOWN = "slowdown"
+	}
 }

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

@@ -8,6 +8,7 @@ import android.os.Bundle
 import android.view.KeyEvent
 import android.view.View
 import android.view.ViewGroup
+import android.widget.Toast
 import androidx.annotation.CallSuper
 import androidx.appcompat.app.AppCompatActivity
 import androidx.appcompat.view.ActionMode
@@ -29,6 +30,7 @@ import org.koitharu.kotatsu.core.ui.util.ActionModeDelegate
 import org.koitharu.kotatsu.core.ui.util.BaseActivityEntryPoint
 import org.koitharu.kotatsu.core.ui.util.WindowInsetsDelegate
 import org.koitharu.kotatsu.core.util.ext.getThemeColor
+import org.koitharu.kotatsu.core.util.ext.isWebViewUnavailable
 
 @Suppress("LeakingThis")
 abstract class BaseActivity<B : ViewBinding> :
@@ -58,11 +60,11 @@ abstract class BaseActivity<B : ViewBinding> :
 		if (isAmoledTheme) {
 			setTheme(R.style.ThemeOverlay_Kotatsu_Amoled)
 		}
+		putDataToExtras(intent)
 		super.onCreate(savedInstanceState)
 		WindowCompat.setDecorFitsSystemWindows(window, false)
 		insetsDelegate.handleImeInsets = true
 		insetsDelegate.addInsetsListener(this)
-		putDataToExtras(intent)
 	}
 
 	override fun onPostCreate(savedInstanceState: Bundle?) {
@@ -164,6 +166,21 @@ abstract class BaseActivity<B : ViewBinding> :
 		intent?.putExtra(EXTRA_DATA, intent.data)
 	}
 
+	protected fun setContentViewWebViewSafe(viewBindingProducer: () -> B): Boolean {
+		return try {
+			setContentView(viewBindingProducer())
+			true
+		} catch (e: Exception) {
+			if (e.isWebViewUnavailable()) {
+				Toast.makeText(this, R.string.web_view_unavailable, Toast.LENGTH_LONG).show()
+				finishAfterTransition()
+				false
+			} else {
+				throw e
+			}
+		}
+	}
+
 	companion object {
 
 		const val EXTRA_DATA = "data"

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

@@ -29,7 +29,6 @@ abstract class BaseFullscreenActivity<B : ViewBinding> :
 					WindowManager.LayoutParams.LAYOUT_IN_DISPLAY_CUTOUT_MODE_SHORT_EDGES
 			}
 		}
-		// insetsControllerCompat.systemBarsBehavior = WindowInsetsControllerCompat.BEHAVIOR_SHOW_TRANSIENT_BARS_BY_SWIPE
 		systemUiController.setSystemUiVisible(true)
 	}
 }

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
 
@@ -28,11 +29,23 @@ open class BaseListAdapter<T : ListModel> : AsyncListDifferDelegationAdapter<T>(
 		return this
 	}
 
-	fun addListListener(listListener: ListListener<T>) {
+	fun addListListener(listListener: ListListener<T>): BaseListAdapter<T> {
 		differ.addListListener(listListener)
+		return this
 	}
 
 	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/BasePreferenceFragment.kt

@@ -1,5 +1,7 @@
 package org.koitharu.kotatsu.core.ui
 
+import android.content.ActivityNotFoundException
+import android.content.Intent
 import android.os.Bundle
 import android.view.View
 import androidx.annotation.CallSuper
@@ -8,7 +10,9 @@ import androidx.core.graphics.Insets
 import androidx.core.view.updatePadding
 import androidx.preference.PreferenceFragmentCompat
 import androidx.recyclerview.widget.RecyclerView
+import com.google.android.material.snackbar.Snackbar
 import dagger.hilt.android.AndroidEntryPoint
+import org.koitharu.kotatsu.R
 import org.koitharu.kotatsu.core.prefs.AppSettings
 import org.koitharu.kotatsu.core.ui.util.RecyclerViewOwner
 import org.koitharu.kotatsu.core.ui.util.WindowInsetsDelegate
@@ -62,4 +66,12 @@ abstract class BasePreferenceFragment(@StringRes private val titleId: Int) :
 	protected fun setTitle(title: CharSequence?) {
 		(activity as? SettingsActivity)?.setSectionTitle(title)
 	}
+
+	protected fun startActivitySafe(intent: Intent) {
+		try {
+			startActivity(intent)
+		} catch (_: ActivityNotFoundException) {
+			Snackbar.make(listView, R.string.operation_not_supported, Snackbar.LENGTH_SHORT).show()
+		}
+	}
 }

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

@@ -68,6 +68,13 @@ abstract class BaseViewModel : ViewModel() {
 		errorEvent.call(error)
 	}
 
+	protected inline suspend fun <T> withLoading(block: () -> T): T = try {
+		loadingCounter.increment()
+		block()
+	} finally {
+		loadingCounter.decrement()
+	}
+
 	protected fun MutableStateFlow<Int>.increment() = update { it + 1 }
 
 	protected fun MutableStateFlow<Int>.decrement() = update { it - 1 }

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

@@ -68,6 +68,14 @@ class RecyclerViewAlertDialog private constructor(
 			return this
 		}
 
+		fun setNeutralButton(
+			@StringRes textId: Int,
+			listener: DialogInterface.OnClickListener,
+		): Builder<T> {
+			delegate.setNeutralButton(textId, listener)
+			return this
+		}
+
 		fun setCancelable(isCancelable: Boolean): Builder<T> {
 			delegate.setCancelable(isCancelable)
 			return this

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

@@ -0,0 +1,14 @@
+package org.koitharu.kotatsu.core.ui.image
+
+import android.graphics.drawable.Drawable
+import coil.target.GenericViewTarget
+import com.google.android.material.chip.Chip
+
+class ChipIconTarget(override val view: Chip) : GenericViewTarget<Chip>() {
+
+	override var drawable: Drawable?
+		get() = view.chipIcon
+		set(value) {
+			view.chipIcon = value
+		}
+}

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

@@ -12,11 +12,10 @@ import android.graphics.RectF
 import android.graphics.drawable.Drawable
 import androidx.annotation.StyleRes
 import androidx.core.content.withStyledAttributes
-import androidx.core.graphics.ColorUtils
 import androidx.core.graphics.withClip
 import com.google.android.material.color.MaterialColors
 import org.koitharu.kotatsu.R
-import kotlin.math.absoluteValue
+import org.koitharu.kotatsu.core.util.KotatsuColors
 
 class FaviconDrawable(
 	context: Context,
@@ -44,7 +43,7 @@ class FaviconDrawable(
 		}
 		paint.textAlign = Paint.Align.CENTER
 		paint.isFakeBoldText = true
-		colorForeground = MaterialColors.harmonize(colorOfString(name), colorBackground)
+		colorForeground = MaterialColors.harmonize(KotatsuColors.random(name), colorBackground)
 	}
 
 	override fun draw(canvas: Canvas) {
@@ -104,9 +103,4 @@ class FaviconDrawable(
 		paint.getTextBounds(text, 0, text.length, tempRect)
 		return testTextSize * width / tempRect.width()
 	}
-
-	private fun colorOfString(str: String): Int {
-		val hue = (str.hashCode() % 360).absoluteValue.toFloat()
-		return ColorUtils.HSLToColor(floatArrayOf(hue, 0.5f, 0.5f))
-	}
 }

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

@@ -38,4 +38,12 @@ abstract class BoundsScrollListener(
 		firstVisibleItemPosition: Int,
 		visibleItemCount: Int
 	) = Unit
+
+	fun invalidate(recyclerView: RecyclerView) {
+		onScrolled(recyclerView, 0, 0)
+	}
+
+	fun postInvalidate(recyclerView: RecyclerView) = recyclerView.post {
+		invalidate(recyclerView)
+	}
 }

app/src/main/kotlin/org/koitharu/kotatsu/core/ui/list/decor/AbstractSelectionItemDecoration.kt

@@ -91,7 +91,7 @@ abstract class AbstractSelectionItemDecoration : RecyclerView.ItemDecoration() {
 		canvas.restoreToCount(checkpoint)
 	}
 
-	protected open fun getItemId(parent: RecyclerView, child: View) = parent.getChildItemId(child)
+	abstract fun getItemId(parent: RecyclerView, child: View): Long
 
 	protected open fun onDrawBackground(
 		canvas: Canvas,

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/model/DateTimeAgo.kt

@@ -2,9 +2,8 @@ package org.koitharu.kotatsu.core.ui.model
 
 import android.content.res.Resources
 import org.koitharu.kotatsu.R
-import org.koitharu.kotatsu.core.util.ext.daysDiff
-import org.koitharu.kotatsu.core.util.ext.format
-import java.util.Date
+import java.time.LocalDate
+import java.time.format.DateTimeFormatter
 
 sealed class DateTimeAgo {
 
@@ -74,32 +73,22 @@ sealed class DateTimeAgo {
 		}
 	}
 
-	class Absolute(private val date: Date) : DateTimeAgo() {
-
-		private val day = date.daysDiff(0)
-
+	data class Absolute(private val date: LocalDate) : DateTimeAgo() {
 		override fun format(resources: Resources): String {
-			return if (date.time == 0L) {
+			return if (date == EPOCH_DATE) {
 				resources.getString(R.string.unknown)
 			} else {
-				date.format("d MMMM")
+				date.format(formatter)
 			}
 		}
 
-		override fun equals(other: Any?): Boolean {
-			if (this === other) return true
-			if (javaClass != other?.javaClass) return false
+		override fun toString() = "abs_${date.toEpochDay()}"
 
-			other as Absolute
-
-			return day == other.day
+		companion object {
+			// TODO: Use Java 9's LocalDate.EPOCH.
+			private val EPOCH_DATE = LocalDate.of(1970, 1, 1)
+			private val formatter = DateTimeFormatter.ofPattern("d MMMM")
 		}
-
-		override fun hashCode(): Int {
-			return day
-		}
-
-		override fun toString() = "abs_$day"
 	}
 
 	object LongAgo : DateTimeAgo() {

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

@@ -12,4 +12,5 @@ val SortOrder.titleRes: Int
 		SortOrder.RATING -> R.string.by_rating
 		SortOrder.NEWEST -> R.string.newest
 		SortOrder.ALPHABETICAL -> R.string.by_name
+		SortOrder.ALPHABETICAL_DESC -> R.string.by_name_reverse
 	}

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/ui/util/ReversibleActionObserver.kt

@@ -7,12 +7,16 @@ import org.koitharu.kotatsu.R
 
 class ReversibleActionObserver(
 	private val snackbarHost: View,
+	private val snackbarAnchor: View? = null,
 ) : FlowCollector<ReversibleAction> {
 
 	override suspend fun emit(value: ReversibleAction) {
 		val handle = value.handle
 		val length = if (handle == null) Snackbar.LENGTH_SHORT else Snackbar.LENGTH_LONG
 		val snackbar = Snackbar.make(snackbarHost, value.stringResId, length)
+		if (snackbarAnchor?.isShown == true) {
+			snackbar.anchorView = snackbarAnchor
+		}
 		if (handle != null) {
 			snackbar.setAction(R.string.undo) { handle.reverseAsync() }
 		}

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

@@ -70,7 +70,7 @@ class WindowInsetsDelegate : OnApplyWindowInsetsListener, View.OnLayoutChangeLis
 		lastInsets = null
 	}
 
-	interface WindowInsetsListener {
+	fun interface WindowInsetsListener {
 
 		fun onWindowInsetsChanged(insets: Insets)
 	}

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

@@ -108,10 +108,9 @@ class ChipsView @JvmOverloads constructor(
 		chip.setChipDrawable(drawable)
 		chip.isCheckedIconVisible = true
 		chip.isChipIconVisible = false
-		chip.setCheckedIconResource(R.drawable.ic_check)
 		chip.isCloseIconVisible = onChipCloseClickListener != null
 		chip.setOnCloseIconClickListener(chipOnCloseListener)
-		chip.setEnsureMinTouchTargetSize(false)
+		chip.setEnsureMinTouchTargetSize(false) // TODO remove
 		chip.setOnClickListener(chipOnClickListener)
 		addView(chip)
 		return chip

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

@@ -1,8 +1,8 @@
 package org.koitharu.kotatsu.core.ui.widgets
 
 import android.content.Context
-import android.util.ArrayMap
 import android.util.AttributeSet
+import androidx.collection.MutableScatterMap
 import com.google.android.material.slider.Slider
 import kotlin.math.cbrt
 import kotlin.math.pow
@@ -12,7 +12,7 @@ class CubicSlider @JvmOverloads constructor(
 	attrs: AttributeSet? = null,
 ) : Slider(context, attrs) {
 
-	private val changeListeners = ArrayMap<OnChangeListener, OnChangeListenerMapper>(1)
+	private val changeListeners = MutableScatterMap<OnChangeListener, OnChangeListenerMapper>(1)
 
 	override fun setValue(value: Float) {
 		super.setValue(value.unmap())

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

@@ -1,397 +0,0 @@
-package org.koitharu.kotatsu.core.ui.widgets
-
-import android.animation.ValueAnimator
-import android.content.Context
-import android.graphics.Canvas
-import android.graphics.Color
-import android.graphics.CornerPathEffect
-import android.graphics.Paint
-import android.graphics.Rect
-import android.graphics.RectF
-import android.graphics.Typeface
-import android.os.Build
-import android.os.Parcelable
-import android.text.Layout
-import android.text.StaticLayout
-import android.text.TextDirectionHeuristic
-import android.text.TextDirectionHeuristics
-import android.text.TextPaint
-import android.util.AttributeSet
-import android.view.View
-import androidx.annotation.RequiresApi
-import androidx.interpolator.view.animation.FastOutSlowInInterpolator
-import org.koitharu.kotatsu.R
-import org.koitharu.kotatsu.core.util.ext.draw
-import org.koitharu.kotatsu.core.util.ext.getAnimationDuration
-import org.koitharu.kotatsu.core.util.ext.resolveDp
-import org.koitharu.kotatsu.core.util.ext.resolveSp
-
-class PieChart @JvmOverloads constructor(
-	context: Context,
-	attrs: AttributeSet? = null,
-	defStyleAttr: Int = 0
-) : View(context, attrs, defStyleAttr), PieChartInterface {
-
-	private var marginTextFirst: Float = context.resources.resolveDp(DEFAULT_MARGIN_TEXT_1)
-	private var marginTextSecond: Float = context.resources.resolveDp(DEFAULT_MARGIN_TEXT_2)
-	private var marginTextThird: Float = context.resources.resolveDp(DEFAULT_MARGIN_TEXT_3)
-	private var marginSmallCircle: Float = context.resources.resolveDp(DEFAULT_MARGIN_SMALL_CIRCLE)
-	private val marginText: Float = marginTextFirst + marginTextSecond
-	private val circleRect = RectF()
-	private var circleStrokeWidth: Float = context.resources.resolveDp(6f)
-	private var circleRadius: Float = 0f
-	private var circlePadding: Float = context.resources.resolveDp(8f)
-	private var circlePaintRoundSize: Boolean = true
-	private var circleSectionSpace: Float = 3f
-	private var circleCenterX: Float = 0f
-	private var circleCenterY: Float = 0f
-	private var numberTextPaint: TextPaint = TextPaint()
-	private var descriptionTextPain: TextPaint = TextPaint()
-	private var amountTextPaint: TextPaint = TextPaint()
-	private var textStartX: Float = 0f
-	private var textStartY: Float = 0f
-	private var textHeight: Int = 0
-	private var textCircleRadius: Float = context.resources.resolveDp(4f)
-	private var textAmountStr: String = ""
-	private var textAmountY: Float = 0f
-	private var textAmountXNumber: Float = 0f
-	private var textAmountXDescription: Float = 0f
-	private var textAmountYDescription: Float = 0f
-	private var totalAmount: Int = 0
-	private var pieChartColors: List<String> = listOf()
-	private var percentageCircleList: List<PieChartModel> = listOf()
-	private var textRowList: MutableList<StaticLayout> = mutableListOf()
-	private var dataList: List<Pair<Int, String>> = listOf()
-	private var animationSweepAngle: Int = 0
-
-	init {
-		var textAmountSize: Float = context.resources.resolveSp(22f)
-		var textNumberSize: Float = context.resources.resolveSp(20f)
-		var textDescriptionSize: Float = context.resources.resolveSp(14f)
-		var textAmountColor: Int = Color.WHITE
-		var textNumberColor: Int = Color.WHITE
-		var textDescriptionColor: Int = Color.GRAY
-
-		if (attrs != null) {
-			val typeArray = context.obtainStyledAttributes(attrs, R.styleable.PieChart)
-
-			val colorResId = typeArray.getResourceId(R.styleable.PieChart_pieChartColors, 0)
-			pieChartColors = typeArray.resources.getStringArray(colorResId).toList()
-
-			marginTextFirst = typeArray.getDimension(R.styleable.PieChart_pieChartMarginTextFirst, marginTextFirst)
-			marginTextSecond = typeArray.getDimension(R.styleable.PieChart_pieChartMarginTextSecond, marginTextSecond)
-			marginTextThird = typeArray.getDimension(R.styleable.PieChart_pieChartMarginTextThird, marginTextThird)
-			marginSmallCircle =
-				typeArray.getDimension(R.styleable.PieChart_pieChartMarginSmallCircle, marginSmallCircle)
-
-			circleStrokeWidth =
-				typeArray.getDimension(R.styleable.PieChart_pieChartCircleStrokeWidth, circleStrokeWidth)
-			circlePadding = typeArray.getDimension(R.styleable.PieChart_pieChartCirclePadding, circlePadding)
-			circlePaintRoundSize =
-				typeArray.getBoolean(R.styleable.PieChart_pieChartCirclePaintRoundSize, circlePaintRoundSize)
-			circleSectionSpace = typeArray.getFloat(R.styleable.PieChart_pieChartCircleSectionSpace, circleSectionSpace)
-
-			textCircleRadius = typeArray.getDimension(R.styleable.PieChart_pieChartTextCircleRadius, textCircleRadius)
-			textAmountSize = typeArray.getDimension(R.styleable.PieChart_pieChartTextAmountSize, textAmountSize)
-			textNumberSize = typeArray.getDimension(R.styleable.PieChart_pieChartTextNumberSize, textNumberSize)
-			textDescriptionSize =
-				typeArray.getDimension(R.styleable.PieChart_pieChartTextDescriptionSize, textDescriptionSize)
-			textAmountColor = typeArray.getColor(R.styleable.PieChart_pieChartTextAmountColor, textAmountColor)
-			textNumberColor = typeArray.getColor(R.styleable.PieChart_pieChartTextNumberColor, textNumberColor)
-			textDescriptionColor =
-				typeArray.getColor(R.styleable.PieChart_pieChartTextDescriptionColor, textDescriptionColor)
-			textAmountStr = typeArray.getString(R.styleable.PieChart_pieChartTextAmount) ?: ""
-
-			typeArray.recycle()
-		}
-
-		circlePadding += circleStrokeWidth
-
-		// Инициализация кистей View
-		initPaints(amountTextPaint, textAmountSize, textAmountColor)
-		initPaints(numberTextPaint, textNumberSize, textNumberColor)
-		initPaints(descriptionTextPain, textDescriptionSize, textDescriptionColor, true)
-	}
-
-	@RequiresApi(Build.VERSION_CODES.M)
-	override fun onMeasure(widthMeasureSpec: Int, heightMeasureSpec: Int) {
-		textRowList.clear()
-
-		val initSizeWidth = resolveDefaultSize(widthMeasureSpec, DEFAULT_VIEW_SIZE_WIDTH)
-
-		val textTextWidth = (initSizeWidth * TEXT_WIDTH_PERCENT)
-		val initSizeHeight = calculateViewHeight(heightMeasureSpec, textTextWidth.toInt())
-
-		textStartX = initSizeWidth - textTextWidth.toFloat()
-		textStartY = initSizeHeight.toFloat() / 2 - textHeight / 2
-
-		calculateCircleRadius(initSizeWidth, initSizeHeight)
-
-		setMeasuredDimension(initSizeWidth, initSizeHeight)
-	}
-
-	override fun onDraw(canvas: Canvas) {
-		super.onDraw(canvas)
-
-		drawCircle(canvas)
-		drawText(canvas)
-	}
-
-	override fun onRestoreInstanceState(state: Parcelable?) {
-		val pieChartState = state as? PieChartState
-		super.onRestoreInstanceState(pieChartState?.superState ?: state)
-
-		dataList = pieChartState?.dataList ?: listOf()
-	}
-
-	override fun onSaveInstanceState(): Parcelable {
-		val superState = super.onSaveInstanceState()
-		return PieChartState(superState, dataList)
-	}
-
-	override fun setDataChart(list: List<Pair<Int, String>>) {
-		dataList = list
-		calculatePercentageOfData()
-	}
-
-	override fun startAnimation() {
-		val animator = ValueAnimator.ofInt(0, 360).apply {
-			duration = context.getAnimationDuration(android.R.integer.config_longAnimTime)
-			interpolator = FastOutSlowInInterpolator()
-			addUpdateListener { valueAnimator ->
-				animationSweepAngle = valueAnimator.animatedValue as Int
-				invalidate()
-			}
-		}
-		animator.start()
-	}
-
-	private fun drawCircle(canvas: Canvas) {
-		for (percent in percentageCircleList) {
-			if (animationSweepAngle > percent.percentToStartAt + percent.percentOfCircle) {
-				canvas.drawArc(circleRect, percent.percentToStartAt, percent.percentOfCircle, false, percent.paint)
-			} else if (animationSweepAngle > percent.percentToStartAt) {
-				canvas.drawArc(
-					circleRect,
-					percent.percentToStartAt,
-					animationSweepAngle - percent.percentToStartAt,
-					false,
-					percent.paint,
-				)
-			}
-		}
-	}
-
-	private fun drawText(canvas: Canvas) {
-		var textBuffY = textStartY
-		textRowList.forEachIndexed { index, staticLayout ->
-			if (index % 2 == 0) {
-				staticLayout.draw(canvas, textStartX + marginSmallCircle + textCircleRadius, textBuffY)
-				canvas.drawCircle(
-					textStartX + marginSmallCircle / 2,
-					textBuffY + staticLayout.height / 2 + textCircleRadius / 2,
-					textCircleRadius,
-					Paint().apply { color = Color.parseColor(pieChartColors[(index / 2) % pieChartColors.size]) },
-				)
-				textBuffY += staticLayout.height + marginTextFirst
-			} else {
-				staticLayout.draw(canvas, textStartX, textBuffY)
-				textBuffY += staticLayout.height + marginTextSecond
-			}
-		}
-
-		canvas.drawText(totalAmount.toString(), textAmountXNumber, textAmountY, amountTextPaint)
-		canvas.drawText(textAmountStr, textAmountXDescription, textAmountYDescription, descriptionTextPain)
-	}
-
-	private fun initPaints(textPaint: TextPaint, textSize: Float, textColor: Int, isDescription: Boolean = false) {
-		textPaint.color = textColor
-		textPaint.textSize = textSize
-		textPaint.isAntiAlias = true
-
-		if (!isDescription) textPaint.typeface = Typeface.create(Typeface.DEFAULT, Typeface.BOLD)
-	}
-
-	private fun resolveDefaultSize(spec: Int, defValue: Int): Int {
-		return when (MeasureSpec.getMode(spec)) {
-			MeasureSpec.UNSPECIFIED -> resources.resolveDp(defValue)
-			else -> MeasureSpec.getSize(spec)
-		}
-	}
-
-	@RequiresApi(Build.VERSION_CODES.M)
-	private fun calculateViewHeight(heightMeasureSpec: Int, textWidth: Int): Int {
-		val initSizeHeight = resolveDefaultSize(heightMeasureSpec, DEFAULT_VIEW_SIZE_HEIGHT)
-		textHeight = (dataList.size * marginText + getTextViewHeight(textWidth)).toInt()
-
-		val textHeightWithPadding = textHeight + paddingTop + paddingBottom
-		return if (textHeightWithPadding > initSizeHeight) textHeightWithPadding else initSizeHeight
-	}
-
-	private fun calculateCircleRadius(width: Int, height: Int) {
-		val circleViewWidth = (width * CIRCLE_WIDTH_PERCENT)
-		circleRadius = if (circleViewWidth > height) {
-			(height.toFloat() - circlePadding) / 2
-		} else {
-			circleViewWidth.toFloat() / 2
-		}
-
-		with(circleRect) {
-			left = circlePadding
-			top = height / 2 - circleRadius
-			right = circleRadius * 2 + circlePadding
-			bottom = height / 2 + circleRadius
-		}
-
-		circleCenterX = (circleRadius * 2 + circlePadding + circlePadding) / 2
-		circleCenterY = (height / 2 + circleRadius + (height / 2 - circleRadius)) / 2
-
-		textAmountY = circleCenterY
-
-		val sizeTextAmountNumber = getWidthOfAmountText(
-			totalAmount.toString(),
-			amountTextPaint,
-		)
-
-		textAmountXNumber = circleCenterX - sizeTextAmountNumber.width() / 2
-		textAmountXDescription = circleCenterX - getWidthOfAmountText(textAmountStr, descriptionTextPain).width() / 2
-		textAmountYDescription = circleCenterY + sizeTextAmountNumber.height() + marginTextThird
-	}
-
-	@RequiresApi(Build.VERSION_CODES.M)
-	private fun getTextViewHeight(maxWidth: Int): Int {
-		var textHeight = 0
-		dataList.forEach {
-			val textLayoutNumber = getMultilineText(
-				text = it.first.toString(),
-				textPaint = numberTextPaint,
-				width = maxWidth,
-			)
-			val textLayoutDescription = getMultilineText(
-				text = it.second,
-				textPaint = descriptionTextPain,
-				width = maxWidth,
-			)
-			textRowList.apply {
-				add(textLayoutNumber)
-				add(textLayoutDescription)
-			}
-			textHeight += textLayoutNumber.height + textLayoutDescription.height
-		}
-
-		return textHeight
-	}
-
-	private fun calculatePercentageOfData() {
-		totalAmount = dataList.fold(0) { res, value -> res + value.first }
-
-		var startAt = circleSectionSpace
-		percentageCircleList = dataList.mapIndexed { index, pair ->
-			var percent = pair.first * 100 / totalAmount.toFloat() - circleSectionSpace
-			percent = if (percent < 0f) 0f else percent
-
-			val resultModel = PieChartModel(
-				percentOfCircle = percent,
-				percentToStartAt = startAt,
-				colorOfLine = Color.parseColor(pieChartColors[index % pieChartColors.size]),
-				stroke = circleStrokeWidth,
-				paintRound = circlePaintRoundSize,
-			)
-			if (percent != 0f) startAt += percent + circleSectionSpace
-			resultModel
-		}
-	}
-
-	private fun getWidthOfAmountText(text: String, textPaint: TextPaint): Rect {
-		val bounds = Rect()
-		textPaint.getTextBounds(text, 0, text.length, bounds)
-		return bounds
-	}
-
-	@RequiresApi(Build.VERSION_CODES.M)
-	private fun getMultilineText(
-		text: CharSequence,
-		textPaint: TextPaint,
-		width: Int,
-		start: Int = 0,
-		end: Int = text.length,
-		alignment: Layout.Alignment = Layout.Alignment.ALIGN_NORMAL,
-		textDir: TextDirectionHeuristic = TextDirectionHeuristics.LTR,
-		spacingMult: Float = 1f,
-		spacingAdd: Float = 0f
-	): StaticLayout {
-
-		return StaticLayout.Builder
-			.obtain(text, start, end, textPaint, width)
-			.setAlignment(alignment)
-			.setTextDirection(textDir)
-			.setLineSpacing(spacingAdd, spacingMult)
-			.build()
-	}
-
-	companion object {
-		private const val DEFAULT_MARGIN_TEXT_1 = 2f
-		private const val DEFAULT_MARGIN_TEXT_2 = 10f
-		private const val DEFAULT_MARGIN_TEXT_3 = 2f
-		private const val DEFAULT_MARGIN_SMALL_CIRCLE = 12f
-
-		private const val TEXT_WIDTH_PERCENT = 0.40
-		private const val CIRCLE_WIDTH_PERCENT = 0.50
-
-		const val DEFAULT_VIEW_SIZE_HEIGHT = 150
-		const val DEFAULT_VIEW_SIZE_WIDTH = 250
-	}
-}
-
-interface PieChartInterface {
-
-	fun setDataChart(list: List<Pair<Int, String>>)
-
-	fun startAnimation()
-}
-
-data class PieChartModel(
-	var percentOfCircle: Float = 0f,
-	var percentToStartAt: Float = 0f,
-	var colorOfLine: Int = 0,
-	var stroke: Float = 0f,
-	var paint: Paint = Paint(),
-	var paintRound: Boolean = true
-) {
-
-	init {
-		if (percentOfCircle < 0 || percentOfCircle > 100) {
-			percentOfCircle = 100f
-		}
-
-		percentOfCircle = 360 * percentOfCircle / 100
-
-		if (percentToStartAt < 0 || percentToStartAt > 100) {
-			percentToStartAt = 0f
-		}
-
-		percentToStartAt = 360 * percentToStartAt / 100
-
-		if (colorOfLine == 0) {
-			colorOfLine = Color.parseColor("#000000")
-		}
-
-		paint = Paint()
-		paint.color = colorOfLine
-		paint.isAntiAlias = true
-		paint.style = Paint.Style.STROKE
-		paint.strokeWidth = stroke
-		paint.isDither = true
-
-		if (paintRound) {
-			paint.strokeJoin = Paint.Join.ROUND
-			paint.strokeCap = Paint.Cap.ROUND
-			paint.pathEffect = CornerPathEffect(8f)
-		}
-	}
-}
-
-class PieChartState(
-	superSavedState: Parcelable?,
-	val dataList: List<Pair<Int, String>>
-) : View.BaseSavedState(superSavedState), Parcelable

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

@@ -11,6 +11,7 @@ import android.view.View
 import android.view.ViewOutlineProvider
 import androidx.annotation.ColorInt
 import androidx.annotation.FloatRange
+import androidx.collection.MutableFloatList
 import androidx.interpolator.view.animation.FastOutSlowInInterpolator
 import org.koitharu.kotatsu.core.util.ext.getAnimationDuration
 import org.koitharu.kotatsu.core.util.ext.isAnimationsEnabled
@@ -25,7 +26,7 @@ class SegmentedBarView @JvmOverloads constructor(
 
 	private val paint = Paint(Paint.ANTI_ALIAS_FLAG)
 	private val segmentsData = ArrayList<Segment>()
-	private val segmentsSizes = ArrayList<Float>()
+	private val segmentsSizes = MutableFloatList()
 	private var cornerSize = 0f
 	private var scaleFactor = 1f
 	private var scaleAnimator: ValueAnimator? = null

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

@@ -9,10 +9,8 @@ import androidx.fragment.app.FragmentManager
 import androidx.fragment.app.FragmentManager.FragmentLifecycleCallbacks
 import org.acra.ACRA
 import org.koitharu.kotatsu.core.ui.DefaultActivityLifecycleCallbacks
-import java.text.DateFormat
-import java.text.SimpleDateFormat
-import java.util.Date
-import java.util.Locale
+import java.time.LocalTime
+import java.time.temporal.ChronoUnit
 import java.util.WeakHashMap
 import javax.inject.Inject
 import javax.inject.Singleton
@@ -20,7 +18,6 @@ import javax.inject.Singleton
 @Singleton
 class AcraScreenLogger @Inject constructor() : FragmentLifecycleCallbacks(), DefaultActivityLifecycleCallbacks {
 
-	private val timeFormat = SimpleDateFormat.getTimeInstance(DateFormat.DEFAULT, Locale.ROOT)
 	private val keys = WeakHashMap<Any, String>()
 
 	override fun onFragmentAttached(fm: FragmentManager, f: Fragment, context: Context) {
@@ -47,11 +44,10 @@ class AcraScreenLogger @Inject constructor() : FragmentLifecycleCallbacks(), Def
 	}
 
 	private fun Any.key() = keys.getOrPut(this) {
-		"${time()}: ${javaClass.simpleName}"
+		val time = LocalTime.now().truncatedTo(ChronoUnit.SECONDS)
+		"$time: ${javaClass.simpleName}"
 	}
 
-	private fun time() = timeFormat.format(Date())
-
 	@Suppress("DEPRECATION")
 	private fun Bundle?.contentToString() = this?.keySet()?.joinToString { k ->
 		val v = get(k)

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

@@ -1,70 +0,0 @@
-package org.koitharu.kotatsu.core.util
-
-import android.content.Context
-import android.view.GestureDetector
-import android.view.MotionEvent
-import kotlin.math.roundToInt
-
-class GridTouchHelper(
-	context: Context,
-	private val listener: OnGridTouchListener,
-) : GestureDetector.SimpleOnGestureListener() {
-
-	private val detector = GestureDetector(context, this)
-	private val width = context.resources.displayMetrics.widthPixels
-	private val height = context.resources.displayMetrics.heightPixels
-	private var isDispatching = false
-
-	init {
-		detector.setIsLongpressEnabled(true)
-		detector.setOnDoubleTapListener(this)
-	}
-
-	fun dispatchTouchEvent(event: MotionEvent) {
-		if (event.actionMasked == MotionEvent.ACTION_DOWN) {
-			isDispatching = listener.onProcessTouch(event.rawX.toInt(), event.rawY.toInt())
-		}
-		detector.onTouchEvent(event)
-	}
-
-	override fun onSingleTapConfirmed(event: MotionEvent): Boolean {
-		if (!isDispatching) {
-			return true
-		}
-		val xIndex = (event.rawX * 2f / width).roundToInt()
-		val yIndex = (event.rawY * 2f / height).roundToInt()
-		listener.onGridTouch(
-			when (xIndex) {
-				0 -> AREA_LEFT
-				1 -> {
-					when (yIndex) {
-						0 -> AREA_TOP
-						1 -> AREA_CENTER
-						2 -> AREA_BOTTOM
-						else -> return false
-					}
-				}
-
-				2 -> AREA_RIGHT
-				else -> return false
-			},
-		)
-		return true
-	}
-
-	companion object {
-
-		const val AREA_CENTER = 1
-		const val AREA_LEFT = 2
-		const val AREA_RIGHT = 3
-		const val AREA_TOP = 4
-		const val AREA_BOTTOM = 5
-	}
-
-	interface OnGridTouchListener {
-
-		fun onGridTouch(area: Int)
-
-		fun onProcessTouch(rawX: Int, rawY: Int): Boolean
-	}
-}

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

@@ -0,0 +1,55 @@
+package org.koitharu.kotatsu.core.util
+
+import android.content.Context
+import androidx.annotation.AttrRes
+import androidx.annotation.ColorInt
+import androidx.core.graphics.ColorUtils
+import com.google.android.material.R
+import com.google.android.material.color.MaterialColors
+import org.koitharu.kotatsu.core.util.ext.getThemeColor
+import org.koitharu.kotatsu.parsers.model.Manga
+import kotlin.math.absoluteValue
+
+object KotatsuColors {
+
+	@ColorInt
+	fun segmentColor(context: Context, @AttrRes resId: Int): Int {
+		val colorHex = String.format("%06x", context.getThemeColor(resId))
+		val hue = getHue(colorHex)
+		val color = ColorUtils.HSLToColor(floatArrayOf(hue, 0.5f, 0.5f))
+		val backgroundColor = context.getThemeColor(R.attr.colorSurfaceContainerHigh)
+		return MaterialColors.harmonize(color, backgroundColor)
+	}
+
+	@ColorInt
+	fun random(seed: Any): Int {
+		val hue = (seed.hashCode() % 360).absoluteValue.toFloat()
+		return ColorUtils.HSLToColor(floatArrayOf(hue, 0.5f, 0.5f))
+	}
+
+	@ColorInt
+	fun ofManga(context: Context, manga: Manga?): Int {
+		val color = if (manga != null) {
+			val hue = (manga.id.absoluteValue % 360).toFloat()
+			ColorUtils.HSLToColor(floatArrayOf(hue, 0.5f, 0.5f))
+		} else {
+			context.getThemeColor(R.attr.colorOutline)
+		}
+		val backgroundColor = context.getThemeColor(R.attr.colorSurfaceContainerHigh)
+		return MaterialColors.harmonize(color, backgroundColor)
+	}
+
+	private fun getHue(hex: String): Float {
+		val r = (hex.substring(0, 2).toInt(16)).toFloat()
+		val g = (hex.substring(2, 4).toInt(16)).toFloat()
+		val b = (hex.substring(4, 6).toInt(16)).toFloat()
+
+		var hue = 0F
+		if ((r >= g) && (g >= b)) {
+			hue = 60 * (g - b) / (r - b)
+		} else if ((g > r) && (r >= b)) {
+			hue = 60 * (2 - (r - b) / (g - b))
+		}
+		return hue
+	}
+}

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

@@ -17,6 +17,7 @@ import android.content.SyncResult
 import android.content.pm.PackageManager
 import android.content.pm.ResolveInfo
 import android.database.SQLException
+import android.graphics.Bitmap
 import android.graphics.Color
 import android.net.Uri
 import android.os.Build
@@ -26,9 +27,10 @@ import android.provider.Settings
 import android.view.View
 import android.view.ViewPropertyAnimator
 import android.view.Window
-import android.widget.Toast
+import android.webkit.WebView
 import androidx.activity.result.ActivityResultLauncher
 import androidx.annotation.IntegerRes
+import androidx.annotation.WorkerThread
 import androidx.core.app.ActivityOptionsCompat
 import androidx.core.app.NotificationManagerCompat
 import androidx.core.content.ContextCompat
@@ -37,6 +39,7 @@ import androidx.lifecycle.Lifecycle
 import androidx.lifecycle.coroutineScope
 import androidx.work.CoroutineWorker
 import com.google.android.material.elevation.ElevationOverlayProvider
+import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.channels.awaitClose
 import kotlinx.coroutines.channels.trySendBlocking
 import kotlinx.coroutines.delay
@@ -45,7 +48,9 @@ import kotlinx.coroutines.flow.callbackFlow
 import kotlinx.coroutines.flow.distinctUntilChanged
 import kotlinx.coroutines.flow.flow
 import kotlinx.coroutines.launch
+import kotlinx.coroutines.runInterruptible
 import okio.IOException
+import okio.use
 import org.json.JSONException
 import org.jsoup.internal.StringUtil.StringJoiner
 import org.koitharu.kotatsu.BuildConfig
@@ -53,6 +58,7 @@ import org.koitharu.kotatsu.R
 import org.koitharu.kotatsu.parsers.util.runCatchingCancellable
 import org.xmlpull.v1.XmlPullParser
 import org.xmlpull.v1.XmlPullParserException
+import java.io.File
 import kotlin.math.roundToLong
 
 val Context.activityManager: ActivityManager?
@@ -210,23 +216,33 @@ fun Context.findActivity(): Activity? = when (this) {
 	else -> null
 }
 
-inline fun Activity.catchingWebViewUnavailability(block: () -> Unit): Boolean {
-	return try {
-		block()
-		true
-	} catch (e: Exception) {
-		if (e.isWebViewUnavailable()) {
-			Toast.makeText(this, R.string.web_view_unavailable, Toast.LENGTH_LONG).show()
-			finishAfterTransition()
-			false
-		} else {
-			throw e
-		}
-	}
-}
-
 fun Context.checkNotificationPermission(): Boolean = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU) {
 	ContextCompat.checkSelfPermission(this, Manifest.permission.POST_NOTIFICATIONS) == PackageManager.PERMISSION_GRANTED
 } else {
 	NotificationManagerCompat.from(this).areNotificationsEnabled()
 }
+
+@WorkerThread
+suspend fun Bitmap.compressToPNG(output: File) = runInterruptible(Dispatchers.IO) {
+	output.outputStream().use { os ->
+		if (!compress(Bitmap.CompressFormat.PNG, 100, os)) {
+			throw IOException("Failed to encode bitmap into PNG format")
+		}
+	}
+}
+
+fun Context.ensureRamAtLeast(requiredSize: Long) {
+	if (ramAvailable < requiredSize) {
+		throw IllegalStateException("Not enough free memory")
+	}
+}
+
+fun WebView.configureForParser(userAgentOverride: String?) = with(settings) {
+	javaScriptEnabled = true
+	domStorageEnabled = true
+	mediaPlaybackRequiresUserGesture = false
+	databaseEnabled = true
+	if (userAgentOverride != null) {
+		userAgentString = userAgentOverride
+	}
+}

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

@@ -24,11 +24,15 @@ inline fun <reified T : Parcelable> Intent.getParcelableExtraCompat(key: String)
 }
 
 inline fun <reified T : Serializable> Intent.getSerializableExtraCompat(key: String): T? {
-	return getSerializableExtra(key) as T?
+	return if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.UPSIDE_DOWN_CAKE) {
+		getSerializableExtra(key, T::class.java)
+	} else {
+		getSerializableExtra(key) as T?
+	}
 }
 
 inline fun <reified T : Serializable> Bundle.getSerializableCompat(key: String): T? {
-	return if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU) {
+	return if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.UPSIDE_DOWN_CAKE) {
 		getSerializable(key, T::class.java)
 	} else {
 		getSerializable(key) as T?

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

@@ -25,7 +25,7 @@ fun ImageView.newImageRequest(lifecycleOwner: LifecycleOwner, data: Any?): Image
 	}
 	// disposeImageRequest()
 	return ImageRequest.Builder(context)
-		.data(data)
+		.data(data?.takeUnless { it == "" })
 		.lifecycle(lifecycleOwner)
 		.crossfade(context)
 		.target(this)

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

@@ -1,30 +1,32 @@
 package org.koitharu.kotatsu.core.util.ext
 
-import android.annotation.SuppressLint
-import android.text.format.DateUtils
-import java.text.SimpleDateFormat
-import java.util.*
-import java.util.concurrent.TimeUnit
+import org.koitharu.kotatsu.core.ui.model.DateTimeAgo
+import java.time.Instant
+import java.time.LocalDate
+import java.time.LocalDateTime
+import java.time.ZoneId
+import java.time.temporal.ChronoUnit
 
-@SuppressLint("SimpleDateFormat")
-fun Date.format(pattern: String): String = SimpleDateFormat(pattern).format(this)
+fun calculateTimeAgo(instant: Instant, showMonths: Boolean = false): DateTimeAgo {
+	// TODO: Use Java 9's LocalDate.ofInstant().
+	val localDate = LocalDateTime.ofInstant(instant, ZoneId.systemDefault()).toLocalDate()
+	val now = LocalDate.now()
+	val diffDays = localDate.until(now, ChronoUnit.DAYS)
 
-fun Date.formatRelative(minResolution: Long): CharSequence = DateUtils.getRelativeTimeSpanString(
-	time, System.currentTimeMillis(), minResolution,
-)
-
-fun Date.daysDiff(other: Long): Int {
-	val thisDay = time / TimeUnit.DAYS.toMillis(1L)
-	val otherDay = other / TimeUnit.DAYS.toMillis(1L)
-	return (thisDay - otherDay).toInt()
-}
-
-fun Date.startOfDay(): Long {
-	val calendar = Calendar.getInstance()
-	calendar.time = this
-	calendar[Calendar.HOUR_OF_DAY] = 0
-	calendar[Calendar.MINUTE] = 0
-	calendar[Calendar.SECOND] = 0
-	calendar[Calendar.MILLISECOND] = 0
-	return calendar.timeInMillis
+	return when {
+		diffDays == 0L -> {
+			if (instant.until(Instant.now(), ChronoUnit.MINUTES) < 3) DateTimeAgo.JustNow
+			else DateTimeAgo.Today
+		}
+		diffDays == 1L -> DateTimeAgo.Yesterday
+		diffDays < 6 -> DateTimeAgo.DaysAgo(diffDays.toInt())
+		else -> {
+			val diffMonths = localDate.until(now, ChronoUnit.MONTHS)
+			if (showMonths && diffMonths <= 6) {
+				DateTimeAgo.MonthsAgo(diffMonths.toInt())
+			} else {
+				DateTimeAgo.Absolute(localDate)
+			}
+		}
+	}
 }

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

@@ -10,7 +10,6 @@ import android.provider.OpenableColumns
 import androidx.core.database.getStringOrNull
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.runInterruptible
-import kotlinx.coroutines.withContext
 import org.koitharu.kotatsu.R
 import org.koitharu.kotatsu.core.fs.FileSequence
 import java.io.File
@@ -19,6 +18,7 @@ import java.nio.file.attribute.BasicFileAttributes
 import java.util.zip.ZipEntry
 import java.util.zip.ZipFile
 import kotlin.io.path.ExperimentalPathApi
+import kotlin.io.path.PathWalkOption
 import kotlin.io.path.readAttributes
 import kotlin.io.path.walk
 
@@ -52,7 +52,7 @@ fun File.getStorageName(context: Context): String = runCatching {
 
 fun Uri.toFileOrNull() = if (scheme == URI_SCHEME_FILE) path?.let(::File) else null
 
-suspend fun File.deleteAwait() = withContext(Dispatchers.IO) {
+suspend fun File.deleteAwait() = runInterruptible(Dispatchers.IO) {
 	delete() || deleteRecursively()
 }
 
@@ -72,7 +72,7 @@ fun ContentResolver.resolveName(uri: Uri): String? {
 }
 
 suspend fun File.computeSize(): Long = runInterruptible(Dispatchers.IO) {
-	walkCompat().sumOf { it.length() }
+	walkCompat(includeDirectories = false).sumOf { it.length() }
 }
 
 fun File.children() = FileSequence(this)
@@ -87,10 +87,16 @@ val File.creationTime
 	}
 
 @OptIn(ExperimentalPathApi::class)
-fun File.walkCompat() = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+fun File.walkCompat(includeDirectories: Boolean): Sequence<File> = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
 	// Use lazy loading on Android 8.0 and later
-	toPath().walk().map { it.toFile() }
+	val walk = if (includeDirectories) {
+		toPath().walk(PathWalkOption.INCLUDE_DIRECTORIES)
+	} else {
+		toPath().walk()
+	}
+	walk.map { it.toFile() }
 } else {
 	// Directories are excluded by default in Path.walk(), so do it here as well
-	walk().filter { it.isFile }
+	val walk = walk()
+	if (includeDirectories) walk else walk.filter { it.isFile }
 }

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

@@ -11,8 +11,10 @@ import kotlinx.coroutines.flow.flow
 import kotlinx.coroutines.flow.map
 import kotlinx.coroutines.flow.onCompletion
 import kotlinx.coroutines.flow.onEach
+import kotlinx.coroutines.flow.transform
 import kotlinx.coroutines.flow.transformLatest
 import org.koitharu.kotatsu.R
+import java.util.concurrent.atomic.AtomicInteger
 
 fun <T> Flow<T>.onFirst(action: suspend (T) -> Unit): Flow<T> {
 	var isFirstCall = true
@@ -37,6 +39,14 @@ fun <T> Flow<T>.onEachWhile(action: suspend (T) -> Boolean): Flow<T> {
 	}
 }
 
+fun <T> Flow<T>.onEachIndexed(action: suspend (index: Int, T) -> Unit): Flow<T> {
+	val counter = AtomicInteger(0)
+	return transform { value ->
+		action(counter.getAndIncrement(), value)
+		return@transform emit(value)
+	}
+}
+
 inline fun <T, R> Flow<List<T>>.mapItems(crossinline transform: (T) -> R): Flow<List<R>> {
 	return map { list -> list.map(transform) }
 }

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

@@ -1,11 +1,13 @@
 package org.koitharu.kotatsu.core.util.ext
 
 import okhttp3.Cookie
+import okhttp3.Headers
 import okhttp3.HttpUrl
 import okhttp3.MediaType.Companion.toMediaType
 import okhttp3.RequestBody.Companion.toRequestBody
 import okhttp3.Response
 import okhttp3.internal.closeQuietly
+import okhttp3.internal.isSensitiveHeader
 import okio.IOException
 import org.json.JSONObject
 import org.jsoup.HttpStatusException
@@ -59,3 +61,16 @@ fun Cookie.newBuilder(): Cookie.Builder = Cookie.Builder().also { c ->
 		c.httpOnly()
 	}
 }
+
+fun String.sanitizeHeaderValue(): String {
+	return if (all(Char::isValidForHeaderValue)) {
+		this // fast path
+	} else {
+		filter(Char::isValidForHeaderValue)
+	}
+}
+
+private fun Char.isValidForHeaderValue(): Boolean {
+	// from okhttp3.Headers$Companion.checkValue
+	return this == '\t' || this in '\u0020'..'\u007e'
+}

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

@@ -20,12 +20,13 @@ inline fun <T> LocaleListCompat.mapToSet(block: (Locale) -> T): Set<T> {
 
 fun LocaleListCompat.getOrThrow(index: Int) = get(index) ?: throw NoSuchElementException()
 
-fun String?.getLocaleDisplayName(context: Context): String {
+fun String.toLocale() = Locale(this)
+
+fun Locale?.getDisplayName(context: Context): String {
 	if (this == null) {
 		return context.getString(R.string.various_languages)
 	}
-	val lc = Locale(this)
-	return lc.getDisplayLanguage(lc).toTitleCase(lc)
+	return getDisplayLanguage(this).toTitleCase(this)
 }
 
 private class LocaleListCompatIterator(private val list: LocaleListCompat) : ListIterator<Locale> {

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

@@ -3,18 +3,18 @@ package org.koitharu.kotatsu.core.util.ext
 import android.annotation.SuppressLint
 import android.content.Context
 import android.content.res.Resources
-import android.util.TypedValue
 import androidx.annotation.Px
+import androidx.core.util.TypedValueCompat
 import kotlin.math.roundToInt
 
 @Px
-fun Resources.resolveDp(dp: Int) = (dp * displayMetrics.density).roundToInt()
+fun Resources.resolveDp(dp: Int) = resolveDp(dp.toFloat()).roundToInt()
 
 @Px
-fun Resources.resolveDp(dp: Float) = dp * displayMetrics.density
+fun Resources.resolveDp(dp: Float) = TypedValueCompat.dpToPx(dp, displayMetrics)
 
 @Px
-fun Resources.resolveSp(sp: Float) = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_SP, sp, displayMetrics)
+fun Resources.resolveSp(sp: Float) = TypedValueCompat.spToPx(sp, displayMetrics)
 
 @SuppressLint("DiscouragedApi")
 fun Context.getSystemBoolean(resName: String, fallback: Boolean): Boolean {

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/Throwable.kt

@@ -2,7 +2,6 @@ package org.koitharu.kotatsu.core.util.ext
 
 import android.content.ActivityNotFoundException
 import android.content.res.Resources
-import android.util.AndroidRuntimeException
 import androidx.annotation.DrawableRes
 import androidx.collection.arraySetOf
 import coil.network.HttpException
@@ -18,6 +17,7 @@ import org.koitharu.kotatsu.core.exceptions.EmptyHistoryException
 import org.koitharu.kotatsu.core.exceptions.SyncApiException
 import org.koitharu.kotatsu.core.exceptions.TooManyRequestExceptions
 import org.koitharu.kotatsu.core.exceptions.UnsupportedFileException
+import org.koitharu.kotatsu.core.exceptions.UnsupportedSourceException
 import org.koitharu.kotatsu.core.exceptions.WrongPasswordException
 import org.koitharu.kotatsu.parsers.ErrorMessages.FILTER_BOTH_LOCALE_GENRES_NOT_SUPPORTED
 import org.koitharu.kotatsu.parsers.ErrorMessages.FILTER_BOTH_STATES_GENRES_NOT_SUPPORTED
@@ -57,6 +57,7 @@ fun Throwable.getDisplayMessage(resources: Resources): String = when (this) {
 
 	is WrongPasswordException -> resources.getString(R.string.wrong_password)
 	is NotFoundException -> resources.getString(R.string.not_found_404)
+	is UnsupportedSourceException -> resources.getString(R.string.unsupported_source)
 
 	is HttpException -> getHttpDisplayMessage(response.code, resources)
 	is HttpStatusException -> getHttpDisplayMessage(statusCode, resources)
@@ -99,14 +100,16 @@ fun Throwable.isReportable(): Boolean {
 	return this is Error || this.javaClass in reportableExceptions
 }
 
+fun Throwable.isNetworkError(): Boolean {
+	return this is UnknownHostException || this is SocketTimeoutException
+}
+
 fun Throwable.report() {
 	val exception = CaughtException(this, "${javaClass.simpleName}($message)")
 	exception.sendWithAcra()
 }
 
 private val reportableExceptions = arraySetOf<Class<*>>(
-	ParseException::class.java,
-	JSONException::class.java,
 	RuntimeException::class.java,
 	IllegalStateException::class.java,
 	IllegalArgumentException::class.java,
@@ -115,8 +118,8 @@ private val reportableExceptions = arraySetOf<Class<*>>(
 )
 
 fun Throwable.isWebViewUnavailable(): Boolean {
-	return (this is AndroidRuntimeException && message?.contains("WebView") == true) ||
-		cause?.isWebViewUnavailable() == true
+	val trace = stackTraceToString()
+	return trace.contains("android.webkit.WebView.<init>")
 }
 
 @Suppress("FunctionName")

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

@@ -1,32 +1,34 @@
 package org.koitharu.kotatsu.core.util.ext
 
-import android.app.Activity
 import android.graphics.Rect
 import android.os.Build
 import android.view.View
 import android.view.View.MeasureSpec
 import android.view.ViewGroup
-import android.view.inputmethod.InputMethodManager
 import android.widget.Checkable
+import androidx.appcompat.widget.ActionMenuView
+import androidx.appcompat.widget.Toolbar
+import androidx.core.view.SoftwareKeyboardControllerCompat
 import androidx.core.view.children
 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.chip.Chip
 import com.google.android.material.progressindicator.BaseProgressIndicator
 import com.google.android.material.slider.Slider
 import com.google.android.material.tabs.TabLayout
 import kotlin.math.roundToInt
 
 fun View.hideKeyboard() {
-	val imm = context.getSystemService(Activity.INPUT_METHOD_SERVICE) as InputMethodManager
-	imm.hideSoftInputFromWindow(this.windowToken, 0)
+	SoftwareKeyboardControllerCompat(this).hide()
 }
 
 fun View.showKeyboard() {
-	val imm = context.getSystemService(Activity.INPUT_METHOD_SERVICE) as InputMethodManager
-	imm.showSoftInput(this, 0)
+	SoftwareKeyboardControllerCompat(this).show()
 }
 
 fun View.hasGlobalPoint(x: Int, y: Int): Boolean {
@@ -153,3 +155,26 @@ fun View.setOnContextClickListenerCompat(listener: View.OnLongClickListener) {
 		setOnContextClickListener(listener::onLongClick)
 	}
 }
+
+val Toolbar.menuView: ActionMenuView?
+	get() {
+		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()
+}
+
+fun Chip.setProgressIcon() {
+	val progressDrawable = CircularProgressDrawable(context)
+	progressDrawable.strokeWidth = resources.resolveDp(2f)
+	progressDrawable.setColorSchemeColors(currentTextColor)
+	chipIcon = progressDrawable
+	progressDrawable.start()
+}

app/src/main/kotlin/org/koitharu/kotatsu/core/util/progress/TimeLeftEstimator.kt

@@ -1,6 +1,8 @@
 package org.koitharu.kotatsu.core.util.progress
 
 import android.os.SystemClock
+import androidx.collection.IntList
+import androidx.collection.MutableIntList
 import java.util.concurrent.TimeUnit
 import kotlin.math.roundToInt
 import kotlin.math.roundToLong
@@ -10,7 +12,7 @@ private const val NO_TIME = -1L
 
 class TimeLeftEstimator {
 
-	private var times = ArrayList<Int>()
+	private var times = MutableIntList()
 	private var lastTick: Tick? = null
 	private val tooLargeTime = TimeUnit.DAYS.toMillis(1)
 
@@ -50,6 +52,15 @@ class TimeLeftEstimator {
 		return if (etl == NO_TIME) NO_TIME else System.currentTimeMillis() + etl
 	}
 
+	private fun IntList.average(): Double {
+		if (isEmpty()) {
+			return 0.0
+		}
+		var acc = 0L
+		forEach { acc += it }
+		return acc / size.toDouble()
+	}
+
 	private class Tick(
 		@JvmField val value: Int,
 		@JvmField val total: Int,

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

@@ -0,0 +1,22 @@
+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 && minutes == 0 -> resources.getString(R.string.less_than_minute)
+		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 +1,53 @@
+package org.koitharu.kotatsu.details.domain
+
+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.details.data.MangaDetails
+import org.koitharu.kotatsu.details.data.ReadingTime
+import org.koitharu.kotatsu.stats.data.StatsRepository
+import java.util.concurrent.TimeUnit
+import javax.inject.Inject
+import kotlin.math.roundToInt
+
+class ReadingTimeUseCase @Inject constructor(
+	private val settings: AppSettings,
+	private val statsRepository: StatsRepository,
+) {
+
+	suspend fun invoke(manga: MangaDetails?, branch: String?, history: MangaHistory?): ReadingTime? {
+		if (!settings.isReadingTimeEstimationEnabled) {
+			return null
+		}
+		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 /* pages */ * getSecondsPerPage(manga.id) * chapters.size
+		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,
+		)
+	}
+
+	private suspend fun getSecondsPerPage(mangaId: Long): Int {
+		var time = if (settings.isStatsEnabled) {
+			TimeUnit.MILLISECONDS.toSeconds(statsRepository.getTimePerPage(mangaId)).toInt()
+		} else {
+			0
+		}
+		if (time == 0) {
+			time = 10 // default
+		}
+		return time
+	}
+}