Setting to optionally sort by ignoring articles

app/src/main/java/eu/kanade/tachiyomi/data/preference/PreferenceKeys.kt

@@ -125,6 +125,8 @@ object PreferenceKeys {
 
     const val lastUnlock = "last_unlock"
 
+    const val removeArticles = "remove_articles"
+
     @Deprecated("Use the preferences of the source")
     fun sourceUsername(sourceId: Long) = "pref_source_username_$sourceId"
 

app/src/main/java/eu/kanade/tachiyomi/data/preference/PreferencesHelper.kt

@@ -184,6 +184,8 @@ class PreferencesHelper(val context: Context) {
 
     fun lastUnlock() = rxPrefs.getLong(Keys.lastUnlock, 0)
 
+    fun removeArticles() = rxPrefs.getBoolean(Keys.removeArticles, false)
+
     fun migrateFlags() = rxPrefs.getInteger("migrate_flags", Int.MAX_VALUE)
 
     fun trustedSignatures() = rxPrefs.getStringSet("trusted_signatures", emptySet())

app/src/main/java/eu/kanade/tachiyomi/ui/library/LibraryPresenter.kt

@@ -5,7 +5,6 @@ import com.jakewharton.rxrelay.BehaviorRelay
 import eu.kanade.tachiyomi.data.cache.CoverCache
 import eu.kanade.tachiyomi.data.database.DatabaseHelper
 import eu.kanade.tachiyomi.data.database.models.Category
-import eu.kanade.tachiyomi.data.database.models.LibraryManga
 import eu.kanade.tachiyomi.data.database.models.Manga
 import eu.kanade.tachiyomi.data.database.models.MangaCategory
 import eu.kanade.tachiyomi.data.download.DownloadManager
@@ -17,14 +16,14 @@ import eu.kanade.tachiyomi.source.SourceManager
 import eu.kanade.tachiyomi.source.model.SChapter
 import eu.kanade.tachiyomi.source.model.SManga
 import eu.kanade.tachiyomi.source.online.HttpSource
-import eu.kanade.tachiyomi.widget.ExtendedNavigationView.Item.TriStateGroup.Companion.STATE_EXCLUDE
-import eu.kanade.tachiyomi.widget.ExtendedNavigationView.Item.TriStateGroup.Companion.STATE_INCLUDE
 import eu.kanade.tachiyomi.ui.base.presenter.BasePresenter
 import eu.kanade.tachiyomi.ui.migration.MigrationFlags
 import eu.kanade.tachiyomi.util.combineLatest
 import eu.kanade.tachiyomi.util.isNullOrUnsubscribed
 import eu.kanade.tachiyomi.util.syncChaptersWithSource
+import eu.kanade.tachiyomi.widget.ExtendedNavigationView.Item.TriStateGroup.Companion.STATE_EXCLUDE
 import eu.kanade.tachiyomi.widget.ExtendedNavigationView.Item.TriStateGroup.Companion.STATE_IGNORE
+import eu.kanade.tachiyomi.widget.ExtendedNavigationView.Item.TriStateGroup.Companion.STATE_INCLUDE
 import rx.Observable
 import rx.Subscription
 import rx.android.schedulers.AndroidSchedulers
@@ -223,11 +222,13 @@ class LibraryPresenter(
         return map.mapValues { entry -> entry.value.sortedWith(comparator) }
     }
 
-    fun sortAlphabetical(i1: LibraryItem, i2: LibraryItem): Int {
+    private fun sortAlphabetical(i1: LibraryItem, i2: LibraryItem): Int {
-        return i1.manga.title.removeArticles().compareTo(i2.manga.title.removeArticles(), true)
+        return if (preferences.removeArticles().getOrDefault())
+            i1.manga.title.removeArticles().compareTo(i2.manga.title.removeArticles(), true)
+        else i1.manga.title.compareTo(i2.manga.title, true)
     }
 
-    fun String.removeArticles(): String {
+    private fun String.removeArticles(): String {
         return this.replace(Regex("^(an|a|the) ", RegexOption.IGNORE_CASE), "")
     }
 

app/src/main/java/eu/kanade/tachiyomi/ui/setting/SettingsGeneralController.kt

@@ -199,6 +199,14 @@ class SettingsGeneralController : SettingsController() {
                 true
             }
         }
+
+        switchPreference {
+            key = Keys.removeArticles
+            titleRes = R.string.pref_remove_articles
+            summaryRes = R.string.pref_remove_articles_summary
+            defaultValue = false
+        }
+
         val biometricManager = BiometricManager.from(context)
         if (biometricManager.canAuthenticate() == BiometricManager.BIOMETRIC_SUCCESS) {
             var preference:IntListPreference? = null

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

@@ -150,6 +150,9 @@
     <string name="charging">Charging</string>
     <string name="pref_update_only_non_completed">Only update ongoing manga</string>
     <string name="pref_auto_update_manga_sync">Sync chapters after reading</string>
+    <string name="pref_remove_articles">Sort by ignoring articles</string>
+    <string name="pref_remove_articles_summary">When sorting alphabetically, sort ignoring
+        articles (a, an, the) at the start of manga titles</string>
     <string name="pref_theme">Application theme</string>
     <string name="light_theme">Main theme</string>
     <string name="dark_theme">Dark theme</string>