Option to prefer Rtl reader

app/build.gradle

@@ -70,7 +70,7 @@ dependencies {
 	implementation 'androidx.activity:activity-ktx:1.2.0-beta01'
 	implementation 'androidx.fragment:fragment-ktx:1.3.0-beta01'
 	implementation 'androidx.lifecycle:lifecycle-runtime-ktx:2.3.0-beta01'
-	implementation 'androidx.constraintlayout:constraintlayout:2.0.2'
+	implementation 'androidx.constraintlayout:constraintlayout:2.0.4'
 	implementation 'androidx.swiperefreshlayout:swiperefreshlayout:1.1.0'
 	implementation 'androidx.recyclerview:recyclerview:1.2.0-alpha06'
 	implementation 'androidx.viewpager2:viewpager2:1.1.0-alpha01'

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

@@ -88,6 +88,11 @@ class AppSettings private constructor(resources: Resources, private val prefs: S
 		false
 	)
 
+	val isPreferRtlReader by BoolPreferenceDelegate(
+		resources.getString(R.string.key_reader_prefer_rtl),
+		false
+	)
+
 	val trackSources by StringSetPreferenceDelegate(
 		resources.getString(R.string.key_track_sources),
 		arraySetOf(TRACK_FAVOURITES, TRACK_HISTORY)

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

@@ -2,7 +2,6 @@ package org.koitharu.kotatsu.core.prefs
 
 enum class ReaderMode(val id: Int) {
 
-	UNKNOWN(0),
 	STANDARD(1),
 	WEBTOON(2),
 	REVERSED(3);

app/src/main/java/org/koitharu/kotatsu/domain/MangaUtils.kt

@@ -10,7 +10,6 @@ import org.koin.core.component.KoinComponent
 import org.koin.core.component.get
 import org.koitharu.kotatsu.BuildConfig
 import org.koitharu.kotatsu.core.model.MangaPage
-import org.koitharu.kotatsu.core.prefs.ReaderMode
 import org.koitharu.kotatsu.utils.ext.await
 import org.koitharu.kotatsu.utils.ext.medianOrNull
 import java.io.InputStream
@@ -24,7 +23,7 @@ object MangaUtils : KoinComponent {
 	 */
 	@WorkerThread
 	@Suppress("BlockingMethodInNonBlockingContext")
-	suspend fun determineReaderMode(pages: List<MangaPage>): ReaderMode? {
+	suspend fun determineMangaIsWebtoon(pages: List<MangaPage>): Boolean? {
 		try {
 			val page = pages.medianOrNull() ?: return null
 			val url = page.source.repository.getPageFullUrl(page)
@@ -45,10 +44,7 @@ object MangaUtils : KoinComponent {
 					getBitmapSize(it.body?.byteStream())
 				}
 			}
-			return when {
+			return size.width * 2 < size.height
-				size.width * 2 < size.height -> ReaderMode.WEBTOON
-				else -> ReaderMode.STANDARD
-			}
 		} catch (e: Exception) {
 			if (BuildConfig.DEBUG) {
 				e.printStackTrace()

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

@@ -1,13 +1,10 @@
 package org.koitharu.kotatsu.ui.base
 
 import android.content.Context
-import android.os.Parcelable
 import androidx.annotation.LayoutRes
 import coil.ImageLoader
 import moxy.MvpAppCompatFragment
 import org.koin.android.ext.android.inject
-import org.koitharu.kotatsu.utils.delegates.ParcelableArgumentDelegate
-import org.koitharu.kotatsu.utils.delegates.StringArgumentDelegate
 
 abstract class BaseFragment(
 	@LayoutRes contentLayoutId: Int
@@ -15,11 +12,6 @@ abstract class BaseFragment(
 
 	protected val coil by inject<ImageLoader>()
 
-	fun stringArg(name: String) = StringArgumentDelegate(name)
-
-	@Deprecated("Use extension", replaceWith = ReplaceWith("parcelableArgument(name)"))
-	fun <T : Parcelable> arg(name: String) = ParcelableArgumentDelegate<T>(name)
-
 	open fun getTitle(): CharSequence? = null
 
 	override fun onAttach(context: Context) {

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

@@ -125,7 +125,7 @@ class ReaderActivity : BaseFullscreenActivity(), ReaderView, ChaptersDialog.OnCh
 					replace(R.id.container, ReversedReaderFragment.newInstance(state))
 				}
 			}
-			else -> if (currentReader !is PagerReaderFragment) {
+			ReaderMode.STANDARD -> if (currentReader !is PagerReaderFragment) {
 				supportFragmentManager.commit {
 					replace(R.id.container, PagerReaderFragment.newInstance(state))
 				}
@@ -135,7 +135,7 @@ class ReaderActivity : BaseFullscreenActivity(), ReaderView, ChaptersDialog.OnCh
 			when (mode) {
 				ReaderMode.WEBTOON -> R.drawable.ic_script
 				ReaderMode.REVERSED -> R.drawable.ic_read_reversed
-				else -> R.drawable.ic_book_page
+				ReaderMode.STANDARD -> R.drawable.ic_book_page
 			}
 		)
 		appbar_top.postDelayed(1000) {
@@ -158,21 +158,23 @@ class ReaderActivity : BaseFullscreenActivity(), ReaderView, ChaptersDialog.OnCh
 		outState.putParcelable(EXTRA_STATE, state)
 	}
 
-	override fun onOptionsItemSelected(item: MenuItem) = when (item.itemId) {
+	override fun onOptionsItemSelected(item: MenuItem): Boolean {
+		when (item.itemId) {
 			R.id.action_reader_mode -> {
 				ReaderConfigDialog.show(
 					supportFragmentManager, when (reader) {
 						is PagerReaderFragment -> ReaderMode.STANDARD
 						is WebtoonReaderFragment -> ReaderMode.WEBTOON
 						is ReversedReaderFragment -> ReaderMode.REVERSED
-					else -> ReaderMode.UNKNOWN
+						else -> {
+							showWaitWhileLoading()
+							return false
+						}
 					}
 				)
-			true
 			}
 			R.id.action_settings -> {
 				startActivity(SimpleSettingsActivity.newReaderSettingsIntent(this))
-			true
 			}
 			R.id.action_chapters -> {
 				ChaptersDialog.show(
@@ -180,11 +182,9 @@ class ReaderActivity : BaseFullscreenActivity(), ReaderView, ChaptersDialog.OnCh
 					state.manga.chapters.orEmpty(),
 					state.chapterId
 				)
-			true
 			}
 			R.id.action_screen_rotate -> {
 				orientationHelper.toggleOrientation()
-			true
 			}
 			R.id.action_pages_thumbs -> {
 				if (reader?.hasItems == true) {
@@ -200,7 +200,6 @@ class ReaderActivity : BaseFullscreenActivity(), ReaderView, ChaptersDialog.OnCh
 				} else {
 					showWaitWhileLoading()
 				}
-			true
 			}
 			R.id.action_save_page -> {
 				if (reader?.hasItems == true) {
@@ -219,9 +218,10 @@ class ReaderActivity : BaseFullscreenActivity(), ReaderView, ChaptersDialog.OnCh
 				} else {
 					showWaitWhileLoading()
 				}
-			true
 			}
-		else -> super.onOptionsItemSelected(item)
+			else -> return super.onOptionsItemSelected(item)
+		}
+		return true
 	}
 
 	override fun onActivityResult(result: Boolean) {

app/src/main/java/org/koitharu/kotatsu/ui/reader/ReaderConfigDialog.kt

@@ -18,9 +18,8 @@ class ReaderConfigDialog : AlertDialogFragment(R.layout.dialog_reader_config),
 
 	override fun onCreate(savedInstanceState: Bundle?) {
 		super.onCreate(savedInstanceState)
-		mode = arguments?.getInt(ARG_MODE, ReaderMode.UNKNOWN.id)
+		mode = arguments?.getInt(ARG_MODE)
 			?.let { ReaderMode.valueOf(it) }
-			?.takeUnless { it == ReaderMode.UNKNOWN }
 			?: ReaderMode.STANDARD
 	}
 

app/src/main/java/org/koitharu/kotatsu/ui/reader/ReaderPresenter.kt

@@ -13,6 +13,7 @@ import org.koin.core.component.inject
 import org.koitharu.kotatsu.BuildConfig
 import org.koitharu.kotatsu.core.model.Manga
 import org.koitharu.kotatsu.core.model.MangaPage
+import org.koitharu.kotatsu.core.prefs.AppSettings
 import org.koitharu.kotatsu.core.prefs.ReaderMode
 import org.koitharu.kotatsu.domain.MangaDataRepository
 import org.koitharu.kotatsu.domain.MangaUtils
@@ -28,27 +29,29 @@ import org.koitharu.kotatsu.utils.ext.mimeType
 class ReaderPresenter : BasePresenter<ReaderView>() {
 
 	private val dataRepository by inject<MangaDataRepository>()
+	private val appSettings by inject<AppSettings>()
 
 	fun init(manga: Manga) {
 		presenterScope.launch {
 			viewState.onLoadingStateChanged(isLoading = true)
 			try {
-				val mode = withContext(Dispatchers.IO) {
+				val mode = withContext(Dispatchers.Default) {
 					val repo = manga.source.repository
 					val chapter =
 						(manga.chapters ?: throw RuntimeException("Chapters is null")).random()
 					var mode = dataRepository.getReaderMode(manga.id)
 					if (mode == null) {
 						val pages = repo.getPages(chapter)
-						mode = MangaUtils.determineReaderMode(pages)
+						val isWebtoon = MangaUtils.determineMangaIsWebtoon(pages)
-						if (mode != null) {
+						mode = getReaderMode(isWebtoon)
+						if (isWebtoon != null) {
 							dataRepository.savePreferences(
 								manga = manga,
 								mode = mode
 							)
 						}
 					}
-					mode ?: ReaderMode.UNKNOWN
+					mode
 				}
 				viewState.onInitReader(manga, mode)
 			} catch (_: CancellationException) {
@@ -101,6 +104,12 @@ class ReaderPresenter : BasePresenter<ReaderView>() {
 		}
 	}
 
+	private fun getReaderMode(isWebtoon: Boolean?) = when {
+		isWebtoon == true -> ReaderMode.WEBTOON
+		appSettings.isPreferRtlReader -> ReaderMode.REVERSED
+		else -> ReaderMode.STANDARD
+	}
+
 	companion object : KoinComponent {
 
 		fun saveState(state: ReaderState) {

app/src/main/java/org/koitharu/kotatsu/ui/search/SearchFragment.kt

@@ -3,14 +3,16 @@ package org.koitharu.kotatsu.ui.search
 import moxy.ktx.moxyPresenter
 import org.koitharu.kotatsu.core.model.MangaSource
 import org.koitharu.kotatsu.ui.list.MangaListFragment
+import org.koitharu.kotatsu.utils.ext.parcelableArgument
+import org.koitharu.kotatsu.utils.ext.stringArgument
 import org.koitharu.kotatsu.utils.ext.withArgs
 
 class SearchFragment : MangaListFragment<Unit>() {
 
 	private val presenter by moxyPresenter(factory = ::SearchPresenter)
 
-	private val query by stringArg(ARG_QUERY)
+	private val query by stringArgument(ARG_QUERY)
-	private val source by arg<MangaSource>(ARG_SOURCE)
+	private val source by parcelableArgument<MangaSource>(ARG_SOURCE)
 
 	override fun onRequestMoreItems(offset: Int) {
 		presenter.loadList(source, query.orEmpty(), offset)

app/src/main/java/org/koitharu/kotatsu/ui/search/global/GlobalSearchFragment.kt

@@ -2,14 +2,15 @@ package org.koitharu.kotatsu.ui.search.global
 
 import moxy.ktx.moxyPresenter
 import org.koitharu.kotatsu.ui.list.MangaListFragment
+import org.koitharu.kotatsu.utils.ext.stringArgument
 import org.koitharu.kotatsu.utils.ext.withArgs
 
 
-class GlobalSearchFragment: MangaListFragment<Unit>() {
+class GlobalSearchFragment : MangaListFragment<Unit>() {
 
 	private val presenter by moxyPresenter(factory = ::GlobalSearchPresenter)
 
-	private val query by stringArg(ARG_QUERY)
+	private val query by stringArgument(ARG_QUERY)
 
 	override fun onRequestMoreItems(offset: Int) {
 		if (offset == 0) {

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

@@ -21,3 +21,8 @@ inline fun <T : Parcelable> Fragment.parcelableArgument(name: String) =
 		requireArguments().getParcelable(name)
 			?: error("No argument $name passed in ${javaClass.simpleName}")
 	}
+
+@Suppress("NOTHING_TO_INLINE")
+inline fun Fragment.stringArgument(name: String) = lazy(LazyThreadSafetyMode.NONE) {
+	arguments?.getString(name)
+}

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

@@ -160,4 +160,6 @@
 	<string name="update_check_failed">Ошибка при проверке обновления</string>
 	<string name="no_update_available">Нет доступных обновлений</string>
 	<string name="right_to_left">Справа налево</string>
+	<string name="prefer_rtl_reader">Предпочитать режим Справа налево</string>
+	<string name="prefer_rtl_reader_summary">Вы можете настроить режим чтения для каждой манги отдельно</string>
 </resources>

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

@@ -23,6 +23,7 @@
 	<string name="key_notifications_vibrate">notifications_vibrate</string>
 	<string name="key_notifications_light">notifications_light</string>
 	<string name="key_reader_animation">reader_animation</string>
+	<string name="key_reader_prefer_rtl">reader_prefer_rtl</string>
 	<string name="key_app_password">app_password</string>
 	<string name="key_protect_app">protect_app</string>
 	<string name="key_app_version">app_version</string>

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

@@ -161,4 +161,6 @@
 	<string name="update_check_failed">Update check failed</string>
 	<string name="no_update_available">No updates available</string>
 	<string name="right_to_left">Right to left</string>
+	<string name="prefer_rtl_reader">Prefer Right to left reader</string>
+	<string name="prefer_rtl_reader_summary">You can set up the reading mode for each manga separately</string>
 </resources>

app/src/main/res/xml/pref_main.xml

@@ -70,6 +70,13 @@
 		android:title="@string/pages_animation"
 		app:iconSpaceReserved="false" />
 
+	<SwitchPreference
+		android:defaultValue="false"
+		android:key="@string/key_reader_prefer_rtl"
+		android:summary="@string/prefer_rtl_reader_summary"
+		android:title="@string/prefer_rtl_reader"
+		app:iconSpaceReserved="false" />
+
 	<PreferenceCategory
 		android:title="@string/new_chapters"
 		app:allowDividerAbove="true"

app/src/main/res/xml/pref_reader.xml

@@ -13,8 +13,15 @@
 
 	<SwitchPreferenceCompat
 		android:defaultValue="false"
-		android:title="@string/pages_animation"
 		android:key="@string/key_reader_animation"
+		android:title="@string/pages_animation"
+		app:iconSpaceReserved="false" />
+
+	<SwitchPreference
+		android:defaultValue="false"
+		android:key="@string/key_reader_prefer_rtl"
+		android:summary="@string/prefer_rtl_reader_summary"
+		android:title="@string/prefer_rtl_reader"
 		app:iconSpaceReserved="false" />
 
 </PreferenceScreen>