feat(reader): Add setting to toggle chapter toast

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

@@ -409,6 +409,9 @@ class AppSettings @Inject constructor(@ApplicationContext context: Context) {
 	val isReaderBarTransparent: Boolean
 		get() = prefs.getBoolean(KEY_READER_BAR_TRANSPARENT, true)
 
+	val isReaderChapterToastEnabled: Boolean
+		get() = prefs.getBoolean(KEY_READER_CHAPTER_TOAST, true)
+
 	val isReaderKeepScreenOn: Boolean
 		get() = prefs.getBoolean(KEY_READER_SCREEN_ON, true)
 
@@ -747,6 +750,7 @@ class AppSettings @Inject constructor(@ApplicationContext context: Context) {
 		const val KEY_SYNC_SETTINGS = "sync_settings"
 		const val KEY_READER_BAR = "reader_bar"
 		const val KEY_READER_BAR_TRANSPARENT = "reader_bar_transparent"
+		const val KEY_READER_CHAPTER_TOAST = "reader_chapter_toast"
 		const val KEY_READER_BACKGROUND = "reader_background"
 		const val KEY_READER_SCREEN_ON = "reader_screen_on"
 		const val KEY_SHORTCUTS = "dynamic_shortcuts"

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

@@ -488,7 +488,11 @@ class ReaderActivity :
 			uiState.incognito -> getString(R.string.incognito_mode)
 			else -> chapterTitle
 		}
-		if (chapterTitle != previous?.getChapterTitle(resources) && chapterTitle.isNotEmpty()) {
+		if (
+			viewModel.isChapterToastEnabled.value &&
+			chapterTitle != previous?.getChapterTitle(resources) &&
+			chapterTitle.isNotEmpty()
+		) {
 			viewBinding.toastView.showTemporary(chapterTitle, TOAST_DURATION)
 		}
 		if (uiState.isSliderAvailable()) {

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

@@ -142,6 +142,12 @@ class ReaderViewModel @Inject constructor(
 		valueProducer = { isReaderBarTransparent },
 	)
 
+	val isChapterToastEnabled = settings.observeAsStateFlow(
+		scope = viewModelScope + Dispatchers.Default,
+		key = AppSettings.KEY_READER_CHAPTER_TOAST,
+		valueProducer = { isReaderChapterToastEnabled },
+	)
+
 	val isKeepScreenOnEnabled = settings.observeAsStateFlow(
 		scope = viewModelScope + Dispatchers.Default,
 		key = AppSettings.KEY_READER_SCREEN_ON,

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

@@ -803,6 +803,8 @@
 	<string name="enable_all_sources">Enable all manga sources</string>
 	<string name="enable_all_sources_summary">All available manga sources will be enabled permanently</string>
 	<string name="all_sources_enabled">All sources are enabled</string>
+	<string name="reader_chapter_toast">Show chapter toast</string>
+	<string name="reader_chapter_toast_summary">Show a toast message with the chapter name when it changes</string>
 	<string name="reader_info_bar_transparent">Transparent reader information bar</string>
 	<string name="backup_restored_background">The backup will be restored in the background</string>
 	<string name="restoring_backup">Restoring backup</string>

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

@@ -144,6 +144,12 @@
 		android:key="reader_bar_transparent"
 		android:title="@string/reader_info_bar_transparent" />
 
+	<SwitchPreferenceCompat
+		android:defaultValue="true"
+		android:key="reader_chapter_toast"
+		android:summary="@string/reader_chapter_toast_summary"
+		android:title="@string/reader_chapter_toast" />
+
 	<ListPreference
 		android:entries="@array/reader_backgrounds"
 		android:key="reader_background"