Reduce memory usage

app/src/main/java/org/koitharu/kotatsu/core/db/entity/MangaWithTags.kt

@@ -3,6 +3,7 @@ package org.koitharu.kotatsu.core.db.entity
 import androidx.room.Embedded
 import androidx.room.Junction
 import androidx.room.Relation
+import org.koitharu.kotatsu.utils.ext.mapToSet
 
 data class MangaWithTags(
 	@Embedded val manga: MangaEntity,
@@ -14,7 +15,7 @@ data class MangaWithTags(
 	val tags: List<TagEntity>
 ) {
 
-	fun toManga() = manga.toManga(tags.map {
+	fun toManga() = manga.toManga(tags.mapToSet {
 		it.toMangaTag()
-	}.toSet())
+	})
 }

app/src/main/java/org/koitharu/kotatsu/core/db/entity/TrackLogWithManga.kt

@@ -4,6 +4,7 @@ import androidx.room.Embedded
 import androidx.room.Junction
 import androidx.room.Relation
 import org.koitharu.kotatsu.core.model.TrackingLogItem
+import org.koitharu.kotatsu.utils.ext.mapToSet
 import java.util.*
 
 data class TrackLogWithManga(
@@ -24,7 +25,7 @@ data class TrackLogWithManga(
 	fun toTrackingLogItem() = TrackingLogItem(
 		id = trackLog.id,
 		chapters = trackLog.chapters.split('\n').filterNot { x -> x.isEmpty() },
-		manga = manga.toManga(tags.map { x -> x.toMangaTag() }.toSet()),
+		manga = manga.toManga(tags.mapToSet { x -> x.toMangaTag() }),
 		createdAt = Date(trackLog.createdAt)
 	)
 }

app/src/main/java/org/koitharu/kotatsu/core/parser/site/ChanRepository.kt

@@ -1,5 +1,6 @@
 package org.koitharu.kotatsu.core.parser.site
 
+import androidx.collection.arraySetOf
 import org.koitharu.kotatsu.R
 import org.koitharu.kotatsu.core.exceptions.ParseException
 import org.koitharu.kotatsu.core.model.*
@@ -13,7 +14,11 @@ abstract class ChanRepository(loaderContext: MangaLoaderContext) : RemoteMangaRe
 
 	protected abstract val defaultDomain: String
 
-	override val sortOrders = setOf(SortOrder.NEWEST, SortOrder.POPULARITY, SortOrder.ALPHABETICAL)
+	override val sortOrders = arraySetOf(
+		SortOrder.NEWEST,
+		SortOrder.POPULARITY,
+		SortOrder.ALPHABETICAL
+	)
 
 	override suspend fun getList(
 		offset: Int,
@@ -51,13 +56,13 @@ abstract class ChanRepository(loaderContext: MangaLoaderContext) : RemoteMangaRe
 				coverUrl = row.selectFirst("div.manga_images")?.selectFirst("img")
 					?.attr("src")?.withDomain(domain).orEmpty(),
 				tags = safe {
-					row.selectFirst("div.genre")?.select("a")?.map {
+					row.selectFirst("div.genre")?.select("a")?.mapToSet {
 						MangaTag(
 							title = it.text(),
 							key = it.attr("href").substringAfterLast('/').urlEncoded(),
 							source = source
 						)
-					}?.toSet()
+					}
 				}.orEmpty(),
 				source = source
 			)
@@ -118,17 +123,17 @@ abstract class ChanRepository(loaderContext: MangaLoaderContext) : RemoteMangaRe
 		val doc = loaderContext.httpGet("https://$domain/catalog").parseHtml()
 		val root = doc.body().selectFirst("div.main_fon").getElementById("side")
 			.select("ul").last()
-		return root.select("li.sidetag").map { li ->
+		return root.select("li.sidetag").mapToSet { li ->
 			val a = li.children().last()
 			MangaTag(
 				title = a.text().capitalize(),
 				key = a.attr("href").substringAfterLast('/'),
 				source = source
 			)
-		}.toSet()
+		}
 	}
 
-	override fun onCreatePreferences() = setOf(R.string.key_parser_domain)
+	override fun onCreatePreferences() = arraySetOf(R.string.key_parser_domain)
 
 	private fun getSortKey(sortOrder: SortOrder?) =
 		when (sortOrder ?: sortOrders.minByOrNull { it.ordinal }) {

app/src/main/java/org/koitharu/kotatsu/core/parser/site/DesuMeRepository.kt

@@ -1,20 +1,18 @@
 package org.koitharu.kotatsu.core.parser.site
 
+import androidx.collection.arraySetOf
 import org.koitharu.kotatsu.R
 import org.koitharu.kotatsu.core.exceptions.ParseException
 import org.koitharu.kotatsu.core.model.*
 import org.koitharu.kotatsu.core.parser.RemoteMangaRepository
 import org.koitharu.kotatsu.domain.MangaLoaderContext
-import org.koitharu.kotatsu.utils.ext.map
+import org.koitharu.kotatsu.utils.ext.*
-import org.koitharu.kotatsu.utils.ext.mapIndexed
-import org.koitharu.kotatsu.utils.ext.parseHtml
-import org.koitharu.kotatsu.utils.ext.parseJson
 
 class DesuMeRepository(loaderContext: MangaLoaderContext) : RemoteMangaRepository(loaderContext) {
 
 	override val source = MangaSource.DESUME
 
-	override val sortOrders = setOf(
+	override val sortOrders = arraySetOf(
 		SortOrder.UPDATED,
 		SortOrder.POPULARITY,
 		SortOrder.NEWEST,
@@ -76,13 +74,13 @@ class DesuMeRepository(loaderContext: MangaLoaderContext) : RemoteMangaRepositor
 		val json = loaderContext.httpGet(url).parseJson().getJSONObject("response")
 			?: throw ParseException("Invalid response")
 		return manga.copy(
-			tags = json.getJSONArray("genres").map {
+			tags = json.getJSONArray("genres").mapToSet {
 				MangaTag(
 					key = it.getString("text"),
 					title = it.getString("russian"),
 					source = manga.source
 				)
-			}.toSet(),
+			},
 			description = json.getString("description"),
 			chapters = json.getJSONObject("chapters").getJSONArray("list").mapIndexed { i, it ->
 				val chid = it.getLong("id")
@@ -113,16 +111,16 @@ class DesuMeRepository(loaderContext: MangaLoaderContext) : RemoteMangaRepositor
 		val domain = conf.getDomain(DOMAIN)
 		val doc = loaderContext.httpGet("https://$domain/manga/").parseHtml()
 		val root = doc.body().getElementById("animeFilter").selectFirst(".catalog-genres")
-		return root.select("li").map {
+		return root.select("li").mapToSet {
 			MangaTag(
 				source = source,
 				key = it.selectFirst("input").attr("data-genre"),
 				title = it.selectFirst("label").text()
 			)
-		}.toSet()
+		}
 	}
 
-	override fun onCreatePreferences() = setOf(R.string.key_parser_domain)
+	override fun onCreatePreferences() = arraySetOf(R.string.key_parser_domain)
 
 	private fun getSortKey(sortOrder: SortOrder?) =
 		when (sortOrder) {

app/src/main/java/org/koitharu/kotatsu/core/parser/site/GroupleRepository.kt

@@ -1,5 +1,6 @@
 package org.koitharu.kotatsu.core.parser.site
 
+import androidx.collection.arraySetOf
 import org.koitharu.kotatsu.R
 import org.koitharu.kotatsu.core.exceptions.ParseException
 import org.koitharu.kotatsu.core.model.*
@@ -12,7 +13,7 @@ abstract class GroupleRepository(loaderContext: MangaLoaderContext) :
 
 	protected abstract val defaultDomain: String
 
-	override val sortOrders = setOf(
+	override val sortOrders = arraySetOf(
 		SortOrder.UPDATED, SortOrder.POPULARITY,
 		SortOrder.NEWEST, SortOrder.RATING
 		//FIXME SortOrder.ALPHABETICAL
@@ -70,13 +71,13 @@ abstract class GroupleRepository(loaderContext: MangaLoaderContext) :
 				author = tileInfo?.selectFirst("a.person-link")?.text(),
 				tags = safe {
 					tileInfo?.select("a.element-link")
-						?.map {
+						?.mapToSet {
 							MangaTag(
 								title = it.text(),
 								key = it.attr("href").substringAfterLast('/'),
 								source = source
 							)
-						}?.toSet()
+						}
 				}.orEmpty(),
 				state = when {
 					node.selectFirst("div.tags")
@@ -153,16 +154,16 @@ abstract class GroupleRepository(loaderContext: MangaLoaderContext) :
 		val doc = loaderContext.httpGet("https://$domain/list/genres/sort_name").parseHtml()
 		val root = doc.body().getElementById("mangaBox").selectFirst("div.leftContent")
 			.selectFirst("table.table")
-		return root.select("a.element-link").map { a ->
+		return root.select("a.element-link").mapToSet { a ->
 			MangaTag(
 				title = a.text().capitalize(),
 				key = a.attr("href").substringAfterLast('/'),
 				source = source
 			)
-		}.toSet()
+		}
 	}
 
-	override fun onCreatePreferences() = setOf(R.string.key_parser_domain)
+	override fun onCreatePreferences() = arraySetOf(R.string.key_parser_domain)
 
 	private fun getSortKey(sortOrder: SortOrder?) =
 		when (sortOrder ?: sortOrders.minByOrNull { it.ordinal }) {

app/src/main/java/org/koitharu/kotatsu/core/parser/site/HenChanRepository.kt

@@ -4,6 +4,7 @@ import org.koitharu.kotatsu.core.exceptions.ParseException
 import org.koitharu.kotatsu.core.model.*
 import org.koitharu.kotatsu.domain.MangaLoaderContext
 import org.koitharu.kotatsu.utils.ext.longHashCode
+import org.koitharu.kotatsu.utils.ext.mapToSet
 import org.koitharu.kotatsu.utils.ext.parseHtml
 import org.koitharu.kotatsu.utils.ext.withDomain
 
@@ -37,14 +38,14 @@ class HenChanRepository(loaderContext: MangaLoaderContext) : ChanRepository(load
 		return manga.copy(
 			description = root.getElementById("description")?.html()?.substringBeforeLast("<div"),
 			largeCoverUrl = root.getElementById("cover")?.attr("src")?.withDomain(domain),
-			tags = root.selectFirst("div.sidetags")?.select("li.sidetag")?.map {
+			tags = root.selectFirst("div.sidetags")?.select("li.sidetag")?.mapToSet {
 				val a = it.children().last()
 				MangaTag(
 					title = a.text(),
 					key = a.attr("href").substringAfterLast('/'),
 					source = source
 				)
-			}?.toSet() ?: manga.tags,
+			} ?: manga.tags,
 			chapters = listOf(
 				MangaChapter(
 					id = readLink.longHashCode(),

app/src/main/java/org/koitharu/kotatsu/core/parser/site/MangaLibRepository.kt

@@ -1,5 +1,7 @@
 package org.koitharu.kotatsu.core.parser.site
 
+import androidx.collection.ArraySet
+import androidx.collection.arraySetOf
 import org.json.JSONArray
 import org.json.JSONObject
 import org.koitharu.kotatsu.R
@@ -16,7 +18,7 @@ open class MangaLibRepository(loaderContext: MangaLoaderContext) :
 
 	override val source = MangaSource.MANGALIB
 
-	override val sortOrders = setOf(
+	override val sortOrders = arraySetOf(
 		SortOrder.RATING,
 		SortOrder.ALPHABETICAL,
 		SortOrder.POPULARITY,
@@ -68,7 +70,7 @@ open class MangaLibRepository(loaderContext: MangaLoaderContext) :
 		}
 	}
 
-	override fun onCreatePreferences() = setOf(R.string.key_parser_domain)
+	override fun onCreatePreferences() = arraySetOf(R.string.key_parser_domain)
 
 	override suspend fun getDetails(manga: Manga): Manga {
 		val doc = loaderContext.httpGet(manga.url + "?section=info").parseHtml()
@@ -126,13 +128,13 @@ open class MangaLibRepository(loaderContext: MangaLoaderContext) :
 			author = info.getElementsMatchingOwnText("Автор").firstOrNull()
 				?.nextElementSibling()?.text() ?: manga.author,
 			tags = info.getElementsMatchingOwnText("Жанры")?.firstOrNull()
-				?.nextElementSibling()?.select("a")?.mapNotNull { a ->
+				?.nextElementSibling()?.select("a")?.mapToSet { a ->
 					MangaTag(
 						title = a.text().capitalize(),
 						key = a.attr("href").substringAfterLast('='),
 						source = source
 					)
-				}?.toSet() ?: manga.tags,
+				} ?: manga.tags,
 			description = info.getElementsMatchingOwnText("Описание")?.firstOrNull()
 				?.nextElementSibling()?.html(),
 			chapters = chapters
@@ -183,7 +185,7 @@ open class MangaLibRepository(loaderContext: MangaLoaderContext) :
 			if (raw.startsWith("window.__DATA")) {
 				val json = JSONObject(raw.substringAfter('=').substringBeforeLast(';'))
 				val genres = json.getJSONObject("filters").getJSONArray("genres")
-				val result = HashSet<MangaTag>(genres.length())
+				val result = ArraySet<MangaTag>(genres.length())
 				for (x in genres) {
 					result += MangaTag(
 						source = source,

app/src/main/java/org/koitharu/kotatsu/core/parser/site/MangaTownRepository.kt

@@ -1,5 +1,6 @@
 package org.koitharu.kotatsu.core.parser.site
 
+import androidx.collection.arraySetOf
 import org.intellij.lang.annotations.Language
 import org.koitharu.kotatsu.R
 import org.koitharu.kotatsu.core.exceptions.ParseException
@@ -13,7 +14,7 @@ class MangaTownRepository(loaderContext: MangaLoaderContext) : RemoteMangaReposi
 
 	override val source = MangaSource.MANGATOWN
 
-	override val sortOrders = setOf(
+	override val sortOrders = arraySetOf(
 		SortOrder.ALPHABETICAL,
 		SortOrder.RATING,
 		SortOrder.POPULARITY,
@@ -71,13 +72,13 @@ class MangaTownRepository(loaderContext: MangaLoaderContext) : RemoteMangaReposi
 					"completed" -> MangaState.FINISHED
 					else -> null
 				},
-				tags = li.selectFirst("p.keyWord")?.select("a")?.mapNotNull tags@{ x ->
+				tags = li.selectFirst("p.keyWord")?.select("a")?.mapNotNullToSet tags@{ x ->
 					MangaTag(
 						title = x.attr("title"),
 						key = x.attr("href").parseTagKey() ?: return@tags null,
 						source = MangaSource.MANGATOWN
 					)
-				}?.toSet().orEmpty(),
+				}.orEmpty(),
 				url = href
 			)
 		}
@@ -150,22 +151,22 @@ class MangaTownRepository(loaderContext: MangaLoaderContext) : RemoteMangaReposi
 			.getElementsContainingOwnText("Genres")
 			.first()
 			.nextElementSibling()
-		return root.select("li").mapNotNull { li ->
+		return root.select("li").mapNotNullToSet { li ->
-			val a = li.selectFirst("a") ?: return@mapNotNull null
+			val a = li.selectFirst("a") ?: return@mapNotNullToSet null
 			val key = a.attr("href").parseTagKey()
 			if (key.isNullOrEmpty()) {
-				return@mapNotNull null
+				return@mapNotNullToSet null
 			}
 			MangaTag(
 				source = MangaSource.MANGATOWN,
 				key = key,
 				title = a.text()
 			)
-		}.toSet()
+		}
 	}
 
 
-	override fun onCreatePreferences() = setOf(R.string.key_parser_domain, R.string.key_parser_ssl)
+	override fun onCreatePreferences() = arraySetOf(R.string.key_parser_domain, R.string.key_parser_ssl)
 
 	private fun String.parseTagKey() = split('/').findLast { TAG_REGEX matches it }
 

app/src/main/java/org/koitharu/kotatsu/core/parser/site/NudeMoonRepository.kt

@@ -1,5 +1,6 @@
 package org.koitharu.kotatsu.core.parser.site
 
+import androidx.collection.arraySetOf
 import org.koitharu.kotatsu.R
 import org.koitharu.kotatsu.core.exceptions.ParseException
 import org.koitharu.kotatsu.core.model.*
@@ -12,7 +13,7 @@ class NudeMoonRepository(loaderContext: MangaLoaderContext) : RemoteMangaReposit
 
 	override val source = MangaSource.NUDEMOON
 
-	override val sortOrders = setOf(SortOrder.NEWEST, SortOrder.POPULARITY, SortOrder.RATING)
+	override val sortOrders = arraySetOf(SortOrder.NEWEST, SortOrder.POPULARITY, SortOrder.RATING)
 
 	init {
 		loaderContext.insertCookies(
@@ -133,7 +134,7 @@ class NudeMoonRepository(loaderContext: MangaLoaderContext) : RemoteMangaReposit
 		}
 	}
 
-	override fun onCreatePreferences() = setOf(R.string.key_parser_domain)
+	override fun onCreatePreferences() = arraySetOf(R.string.key_parser_domain)
 
 	private fun getSortKey(sortOrder: SortOrder?) =
 		when (sortOrder ?: sortOrders.minByOrNull { it.ordinal }) {

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

@@ -5,6 +5,7 @@ import android.content.SharedPreferences
 import android.content.res.Resources
 import android.provider.Settings
 import androidx.appcompat.app.AppCompatDelegate
+import androidx.collection.arraySetOf
 import androidx.core.content.edit
 import androidx.preference.PreferenceManager
 import org.koitharu.kotatsu.R
@@ -44,7 +45,7 @@ class AppSettings private constructor(resources: Resources, private val prefs: S
 
 	val readerPageSwitch by StringSetPreferenceDelegate(
 		resources.getString(R.string.key_reader_switchers),
-		setOf(PAGE_SWITCH_TAPS)
+		arraySetOf(PAGE_SWITCH_TAPS)
 	)
 
 	var isTrafficWarningEnabled by BoolPreferenceDelegate(
@@ -89,7 +90,7 @@ class AppSettings private constructor(resources: Resources, private val prefs: S
 
 	val trackSources by StringSetPreferenceDelegate(
 		resources.getString(R.string.key_track_sources),
-		setOf(TRACK_FAVOURITES, TRACK_HISTORY)
+		arraySetOf(TRACK_FAVOURITES, TRACK_HISTORY)
 	)
 
 	var appPassword by NullableStringPreferenceDelegate(

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

@@ -11,27 +11,28 @@ import org.koitharu.kotatsu.core.db.entity.MangaEntity
 import org.koitharu.kotatsu.core.db.entity.TagEntity
 import org.koitharu.kotatsu.core.model.FavouriteCategory
 import org.koitharu.kotatsu.core.model.Manga
+import org.koitharu.kotatsu.utils.ext.mapToSet
 
 class FavouritesRepository(private val db: MangaDatabase) {
 
 	suspend fun getAllManga(): List<Manga> {
 		val entities = db.favouritesDao.findAll()
-		return entities.map { it.manga.toManga(it.tags.map(TagEntity::toMangaTag).toSet()) }
+		return entities.map { it.manga.toManga(it.tags.mapToSet(TagEntity::toMangaTag)) }
 	}
 
 	suspend fun getAllManga(offset: Int): List<Manga> {
 		val entities = db.favouritesDao.findAll(offset, 20)
-		return entities.map { it.manga.toManga(it.tags.map(TagEntity::toMangaTag).toSet()) }
+		return entities.map { it.manga.toManga(it.tags.mapToSet(TagEntity::toMangaTag)) }
 	}
 
 	suspend fun getManga(categoryId: Long): List<Manga> {
 		val entities = db.favouritesDao.findAll(categoryId)
-		return entities.map { it.manga.toManga(it.tags.map(TagEntity::toMangaTag).toSet()) }
+		return entities.map { it.manga.toManga(it.tags.mapToSet(TagEntity::toMangaTag)) }
 	}
 
 	suspend fun getManga(categoryId: Long, offset: Int): List<Manga> {
 		val entities = db.favouritesDao.findAll(categoryId, offset, 20)
-		return entities.map { it.manga.toManga(it.tags.map(TagEntity::toMangaTag).toSet()) }
+		return entities.map { it.manga.toManga(it.tags.mapToSet(TagEntity::toMangaTag)) }
 	}
 
 	suspend fun getAllCategories(): List<FavouriteCategory> {

app/src/main/java/org/koitharu/kotatsu/domain/history/HistoryRepository.kt

@@ -13,6 +13,7 @@ import org.koitharu.kotatsu.core.db.entity.TagEntity
 import org.koitharu.kotatsu.core.model.Manga
 import org.koitharu.kotatsu.core.model.MangaHistory
 import org.koitharu.kotatsu.domain.tracking.TrackingRepository
+import org.koitharu.kotatsu.utils.ext.mapToSet
 
 class HistoryRepository(private val db: MangaDatabase) : KoinComponent {
 
@@ -20,7 +21,7 @@ class HistoryRepository(private val db: MangaDatabase) : KoinComponent {
 
 	suspend fun getList(offset: Int, limit: Int = 20): List<Manga> {
 		val entities = db.historyDao.findAll(offset, limit)
-		return entities.map { it.manga.toManga(it.tags.map(TagEntity::toMangaTag).toSet()) }
+		return entities.map { it.manga.toManga(it.tags.mapToSet(TagEntity::toMangaTag)) }
 	}
 
 	suspend fun addOrUpdate(manga: Manga, chapterId: Long, page: Int, scroll: Int) {

app/src/main/java/org/koitharu/kotatsu/domain/local/MangaIndex.kt

@@ -8,7 +8,7 @@ import org.koitharu.kotatsu.core.model.MangaChapter
 import org.koitharu.kotatsu.core.model.MangaSource
 import org.koitharu.kotatsu.core.model.MangaTag
 import org.koitharu.kotatsu.utils.ext.getStringOrNull
-import org.koitharu.kotatsu.utils.ext.map
+import org.koitharu.kotatsu.utils.ext.mapToSet
 import org.koitharu.kotatsu.utils.ext.safe
 
 class MangaIndex(source: String?) {
@@ -51,13 +51,13 @@ class MangaIndex(source: String?) {
 			rating = json.getDouble("rating").toFloat(),
 			coverUrl = json.getString("cover"),
 			description = json.getStringOrNull("description"),
-			tags = json.getJSONArray("tags").map { x ->
+			tags = json.getJSONArray("tags").mapToSet { x ->
 				MangaTag(
 					title = x.getString("title"),
 					key = x.getString("key"),
 					source = source
 				)
-			}.toSet(),
+			},
 			chapters = getChapters(json.getJSONObject("chapters"), source)
 		)
 	}

app/src/main/java/org/koitharu/kotatsu/ui/download/DownloadService.kt

@@ -56,7 +56,7 @@ class DownloadService : BaseService() {
 		when (intent?.action) {
 			ACTION_DOWNLOAD_START -> {
 				val manga = intent.getParcelableExtra<Manga>(EXTRA_MANGA)
-				val chapters = intent.getLongArrayExtra(EXTRA_CHAPTERS_IDS)?.toSet()
+				val chapters = intent.getLongArrayExtra(EXTRA_CHAPTERS_IDS)?.toArraySet()
 				if (manga != null) {
 					jobs[startId] = downloadManga(manga, chapters, startId)
 					Toast.makeText(this, R.string.manga_downloading_, Toast.LENGTH_SHORT).show()

app/src/main/java/org/koitharu/kotatsu/ui/list/favourites/categories/FavouriteCategoriesPresenter.kt

@@ -7,6 +7,7 @@ import org.koin.core.component.get
 import org.koitharu.kotatsu.core.model.Manga
 import org.koitharu.kotatsu.domain.favourites.FavouritesRepository
 import org.koitharu.kotatsu.ui.base.BasePresenter
+import org.koitharu.kotatsu.utils.ext.mapToSet
 
 @InjectViewState
 class FavouriteCategoriesPresenter : BasePresenter<FavouriteCategoriesView>() {
@@ -29,7 +30,7 @@ class FavouriteCategoriesPresenter : BasePresenter<FavouriteCategoriesView>() {
 	fun loadMangaCategories(manga: Manga) {
 		launchJob {
 			val categories = repository.getCategories(manga.id)
-			viewState.onCheckedCategoriesChanged(categories.map { it.id.toInt() }.toSet())
+			viewState.onCheckedCategoriesChanged(categories.mapToSet { it.id.toInt() })
 		}
 	}
 

app/src/main/java/org/koitharu/kotatsu/ui/settings/sources/SourcesAdapter.kt

@@ -11,6 +11,7 @@ import org.koitharu.kotatsu.core.model.MangaSource
 import org.koitharu.kotatsu.core.prefs.AppSettings
 import org.koitharu.kotatsu.domain.MangaProviderFactory
 import org.koitharu.kotatsu.ui.base.list.OnRecyclerItemClickListener
+import org.koitharu.kotatsu.utils.ext.mapToSet
 import org.koitharu.kotatsu.utils.ext.safe
 
 class SourcesAdapter(private val onItemClickListener: OnRecyclerItemClickListener<MangaSource>) :
@@ -44,7 +45,7 @@ class SourcesAdapter(private val onItemClickListener: OnRecyclerItemClickListene
 			} else {
 				hiddenItems.add(holder.requireData())
 			}
-			settings.hiddenSources = hiddenItems.map { x -> x.name }.toSet()
+			settings.hiddenSources = hiddenItems.mapToSet { x -> x.name }
 		}
 		holder.imageView_config.setOnClickListener { v ->
 			onItemClickListener.onItemClick(holder.requireData(), holder.bindingAdapterPosition, v)

app/src/main/java/org/koitharu/kotatsu/utils/ext/CollectionExt.kt

@@ -30,7 +30,28 @@ fun <T> List<T>.medianOrNull(): T? = when {
 
 inline fun <T, R> Collection<T>.mapToSet(transform: (T) -> R): Set<R> {
 	val destination = ArraySet<R>(size)
-	for (item in this)
+	for (item in this) {
 		destination.add(transform(item))
+	}
 	return destination
+}
+
+inline fun <T, R> Collection<T>.mapNotNullToSet(transform: (T) -> R?): Set<R> {
+	val destination = ArraySet<R>(size)
+	for (item in this) {
+		destination.add(transform(item) ?: continue)
+	}
+	return destination
+}
+
+fun LongArray.toArraySet(): Set<Long> {
+	return when (size) {
+		0 -> emptySet()
+		1 -> setOf(this[0])
+		else -> ArraySet<Long>(size).also { set ->
+			for (item in this) {
+				set.add(item)
+			}
+		}
+	}
 }

app/src/main/java/org/koitharu/kotatsu/utils/ext/FragmentExt.kt

@@ -3,7 +3,7 @@ package org.koitharu.kotatsu.utils.ext
 import android.os.Bundle
 import androidx.fragment.app.Fragment
 
-fun <T : Fragment> T.withArgs(size: Int, block: Bundle.() -> Unit): T {
+inline fun <T : Fragment> T.withArgs(size: Int, block: Bundle.() -> Unit): T {
 	val b = Bundle(size)
 	b.block()
 	this.arguments = b

app/src/main/java/org/koitharu/kotatsu/utils/ext/JsonExt.kt

@@ -1,5 +1,6 @@
 package org.koitharu.kotatsu.utils.ext
 
+import androidx.collection.ArraySet
 import org.json.JSONArray
 import org.json.JSONObject
 
@@ -36,4 +37,14 @@ private class JSONIterator(private val array: JSONArray) : Iterator<JSONObject>
 
 	override fun next(): JSONObject = array.getJSONObject(index++)
 
+}
+
+fun <T> JSONArray.mapToSet(block: (JSONObject) -> T): Set<T> {
+	val len = length()
+	val result = ArraySet<T>(len)
+	for (i in 0 until len) {
+		val jo = getJSONObject(i)
+		result.add(block(jo))
+	}
+	return result
 }

app/src/main/java/org/koitharu/kotatsu/utils/ext/StringExt.kt

@@ -1,6 +1,7 @@
 package org.koitharu.kotatsu.utils.ext
 
 import android.net.Uri
+import androidx.collection.arraySetOf
 import java.math.BigInteger
 import java.net.URLEncoder
 import java.security.MessageDigest
@@ -71,7 +72,7 @@ fun String.transliterate(skipMissing: Boolean): String {
 }
 
 fun String.toFileNameSafe() = this.transliterate(false)
-	.replace(Regex("[^a-z0-9_\\-]", setOf(RegexOption.IGNORE_CASE)), " ")
+	.replace(Regex("[^a-z0-9_\\-]", arraySetOf(RegexOption.IGNORE_CASE)), " ")
 	.replace(Regex("\\s+"), "_")
 
 fun String.ellipsize(maxLength: Int) = if (this.length > maxLength) {

app/src/main/java/org/koitharu/kotatsu/utils/ext/ViewExt.kt

@@ -143,7 +143,7 @@ fun View.measureWidth(): Int {
 	} else vw
 }
 
-fun ViewPager2.doOnPageChanged(callback: (Int) -> Unit) {
+inline fun ViewPager2.doOnPageChanged(crossinline callback: (Int) -> Unit) {
 	registerOnPageChangeCallback(object : ViewPager2.OnPageChangeCallback() {
 
 		override fun onPageSelected(position: Int) {
@@ -153,7 +153,7 @@ fun ViewPager2.doOnPageChanged(callback: (Int) -> Unit) {
 	})
 }
 
-fun RecyclerView.doOnCurrentItemChanged(callback: (Int) -> Unit) {
+inline fun RecyclerView.doOnCurrentItemChanged(crossinline callback: (Int) -> Unit) {
 	addOnScrollListener(object : RecyclerView.OnScrollListener() {
 
 		private var lastItem = -1