Reader control direction depends on mode #214

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

@@ -65,6 +65,9 @@ class AppSettings @Inject constructor(@ApplicationContext context: Context) {
 	val readerPageSwitch: Set<String>
 		get() = prefs.getStringSet(KEY_READER_SWITCHERS, null) ?: setOf(PAGE_SWITCH_TAPS)
 
+	val isReaderTapsAdaptive: Boolean
+		get() = !prefs.getBoolean(KEY_READER_TAPS_LTR, false)
+
 	var isTrafficWarningEnabled: Boolean
 		get() = prefs.getBoolean(KEY_TRAFFIC_WARNING, true)
 		set(value) = prefs.edit { putBoolean(KEY_TRAFFIC_WARNING, value) }
@@ -321,6 +324,7 @@ class AppSettings @Inject constructor(@ApplicationContext context: Context) {
 		const val KEY_SYNC = "sync"
 		const val KEY_READER_BAR = "reader_bar"
 		const val KEY_SHORTCUTS = "dynamic_shortcuts"
+		const val KEY_READER_TAPS_LTR = "reader_taps_ltr"
 
 		// About
 		const val KEY_APP_UPDATE = "app_update"

app/src/main/java/org/koitharu/kotatsu/main/ui/protect/AppProtectHelper.kt

@@ -6,6 +6,7 @@ import android.content.Intent
 import android.os.Bundle
 import javax.inject.Inject
 import javax.inject.Singleton
+import org.acra.dialog.CrashReportDialog
 import org.koitharu.kotatsu.core.prefs.AppSettings
 
 @Singleton
@@ -14,7 +15,7 @@ class AppProtectHelper @Inject constructor(private val settings: AppSettings) :
 	private var isUnlocked = settings.appPassword.isNullOrEmpty()
 
 	override fun onActivityCreated(activity: Activity, savedInstanceState: Bundle?) {
-		if (activity !is ProtectActivity && !isUnlocked) {
+		if (!isUnlocked && activity !is ProtectActivity && activity !is CrashReportDialog) {
 			val sourceIntent = Intent(activity, activity.javaClass)
 			activity.intent?.let {
 				sourceIntent.putExtras(it)

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

@@ -74,6 +74,9 @@ class ReaderActivity :
 			pageSwitchTimer.delaySec = value
 		}
 
+	override val readerMode: ReaderMode?
+		get() = readerManager.currentMode
+
 	private lateinit var pageSwitchTimer: PageSwitchTimer
 	private lateinit var touchHelper: GridTouchHelper
 	private lateinit var controlDelegate: ReaderControlDelegate
@@ -88,7 +91,7 @@ class ReaderActivity :
 		supportActionBar?.setDisplayHomeAsUpEnabled(true)
 		touchHelper = GridTouchHelper(this, this)
 		pageSwitchTimer = PageSwitchTimer(this, this)
-		controlDelegate = ReaderControlDelegate(lifecycleScope, settings, this)
+		controlDelegate = ReaderControlDelegate(settings, this, this)
 		binding.toolbarBottom.setOnMenuItemClickListener(::onOptionsItemSelected)
 		binding.slider.setLabelFormatter(PageLabelFormatter())
 		ReaderSliderListener(this, viewModel).attachToSlider(binding.slider)

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

@@ -1,33 +1,39 @@
 package org.koitharu.kotatsu.reader.ui
 
+import android.content.SharedPreferences
 import android.view.KeyEvent
 import android.view.SoundEffectConstants
 import android.view.View
-import androidx.lifecycle.LifecycleCoroutineScope
+import androidx.lifecycle.DefaultLifecycleObserver
-import kotlinx.coroutines.Dispatchers
+import androidx.lifecycle.LifecycleOwner
-import kotlinx.coroutines.flow.flowOn
-import kotlinx.coroutines.flow.launchIn
-import kotlinx.coroutines.flow.onEach
 import org.koitharu.kotatsu.core.prefs.AppSettings
-import org.koitharu.kotatsu.core.prefs.observeAsFlow
+import org.koitharu.kotatsu.core.prefs.ReaderMode
 import org.koitharu.kotatsu.utils.GridTouchHelper
 
 class ReaderControlDelegate(
-	scope: LifecycleCoroutineScope,
+	private val settings: AppSettings,
-	settings: AppSettings,
 	private val listener: OnInteractionListener,
-) {
+	owner: LifecycleOwner,
+) : DefaultLifecycleObserver, SharedPreferences.OnSharedPreferenceChangeListener {
 
 	private var isTapSwitchEnabled: Boolean = true
 	private var isVolumeKeysSwitchEnabled: Boolean = false
+	private var isReaderTapsAdaptive: Boolean = true
 
 	init {
-		settings.observeAsFlow(AppSettings.KEY_READER_SWITCHERS) { readerPageSwitch }
+		owner.lifecycle.addObserver(this)
-			.flowOn(Dispatchers.Default)
+		settings.subscribe(this)
-			.onEach {
+		updateSettings()
-				isTapSwitchEnabled = AppSettings.PAGE_SWITCH_TAPS in it
+	}
-				isVolumeKeysSwitchEnabled = AppSettings.PAGE_SWITCH_VOLUME_KEYS in it
+
-			}.launchIn(scope)
+	override fun onDestroy(owner: LifecycleOwner) {
+		settings.unsubscribe(this)
+		owner.lifecycle.removeObserver(this)
+		super.onDestroy(owner)
+	}
+
+	override fun onSharedPreferenceChanged(sharedPreferences: SharedPreferences?, key: String?) {
+		updateSettings()
 	}
 
 	fun onGridTouch(area: Int, view: View) {
@@ -41,7 +47,7 @@ class ReaderControlDelegate(
 				view.playSoundEffect(SoundEffectConstants.NAVIGATION_UP)
 			}
 			GridTouchHelper.AREA_LEFT -> if (isTapSwitchEnabled) {
-				listener.switchPageBy(-1)
+				listener.switchPageBy(if (isReaderTapsReversed()) 1 else -1)
 				view.playSoundEffect(SoundEffectConstants.NAVIGATION_LEFT)
 			}
 			GridTouchHelper.AREA_BOTTOM -> if (isTapSwitchEnabled) {
@@ -49,7 +55,7 @@ class ReaderControlDelegate(
 				view.playSoundEffect(SoundEffectConstants.NAVIGATION_DOWN)
 			}
 			GridTouchHelper.AREA_RIGHT -> if (isTapSwitchEnabled) {
-				listener.switchPageBy(1)
+				listener.switchPageBy(if (isReaderTapsReversed()) -1 else 1)
 				view.playSoundEffect(SoundEffectConstants.NAVIGATION_RIGHT)
 			}
 		}
@@ -72,19 +78,25 @@ class ReaderControlDelegate(
 		KeyEvent.KEYCODE_PAGE_DOWN,
 		KeyEvent.KEYCODE_SYSTEM_NAVIGATION_DOWN,
 		KeyEvent.KEYCODE_DPAD_DOWN,
-		KeyEvent.KEYCODE_DPAD_RIGHT,
 		-> {
 			listener.switchPageBy(1)
 			true
 		}
+		KeyEvent.KEYCODE_DPAD_RIGHT -> {
+			listener.switchPageBy(if (isReaderTapsReversed()) -1 else 1)
+			true
+		}
 		KeyEvent.KEYCODE_PAGE_UP,
 		KeyEvent.KEYCODE_SYSTEM_NAVIGATION_UP,
 		KeyEvent.KEYCODE_DPAD_UP,
-		KeyEvent.KEYCODE_DPAD_LEFT,
 		-> {
 			listener.switchPageBy(-1)
 			true
 		}
+		KeyEvent.KEYCODE_DPAD_LEFT -> {
+			listener.switchPageBy(if (isReaderTapsReversed()) 1 else -1)
+			true
+		}
 		KeyEvent.KEYCODE_DPAD_CENTER -> {
 			listener.toggleUiVisibility()
 			true
@@ -99,8 +111,21 @@ class ReaderControlDelegate(
 			)
 	}
 
+	private fun updateSettings() {
+		val switch = settings.readerPageSwitch
+		isTapSwitchEnabled = AppSettings.PAGE_SWITCH_TAPS in switch
+		isVolumeKeysSwitchEnabled = AppSettings.PAGE_SWITCH_VOLUME_KEYS in switch
+		isReaderTapsAdaptive = settings.isReaderTapsAdaptive
+	}
+
+	private fun isReaderTapsReversed(): Boolean {
+		return isReaderTapsAdaptive && listener.readerMode == ReaderMode.REVERSED
+	}
+
 	interface OnInteractionListener {
 
+		val readerMode: ReaderMode?
+
 		fun switchPageBy(delta: Int)
 
 		fun toggleUiVisibility()

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

@@ -379,4 +379,6 @@
 	<string name="manga_error_description_pattern">Error details:&lt;br>&lt;tt>%1$s&lt;/tt>&lt;br>&lt;br>1. Try to &lt;a href="%2$s">open manga in a web browser&lt;/a> to ensure it is available on its source&lt;br>2. If it is available, send an error report to the developers.</string>
 	<string name="history_shortcuts">Show recent manga shortcuts</string>
 	<string name="history_shortcuts_summary">Make recent manga available by long pressing on application icon</string>
+	<string name="reader_control_ltr_summary">Tap on the right edge or pressing the right key always switches to the next page</string>
+	<string name="reader_control_ltr">Ergonomic reader control</string>
 </resources>

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

@@ -29,6 +29,12 @@
 		android:title="@string/switch_pages"
 		app:allowDividerAbove="true" />
 
+	<SwitchPreferenceCompat
+		android:defaultValue="false"
+		android:key="reader_taps_ltr"
+		android:summary="@string/reader_control_ltr_summary"
+		android:title="@string/reader_control_ltr" />
+
 	<SwitchPreferenceCompat
 		android:defaultValue="false"
 		android:key="reader_animation"