Make keep screen on in reader optional

app/build.gradle

@@ -90,7 +90,7 @@ dependencies {
 
 	implementation 'androidx.appcompat:appcompat:1.6.1'
 	implementation 'androidx.core:core-ktx:1.12.0'
-	implementation 'androidx.activity:activity-ktx:1.7.2'
+	implementation 'androidx.activity:activity-ktx:1.8.0-rc01'
 	implementation 'androidx.fragment:fragment-ktx:1.6.1'
 	implementation 'androidx.lifecycle:lifecycle-viewmodel-ktx:2.6.2'
 	implementation 'androidx.lifecycle:lifecycle-livedata-ktx:2.6.2'

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

@@ -270,6 +270,9 @@ class AppSettings @Inject constructor(@ApplicationContext context: Context) {
 	val isReaderSliderEnabled: Boolean
 		get() = prefs.getBoolean(KEY_READER_SLIDER, true)
 
+	val isReaderKeepScreenOn: Boolean
+		get() = prefs.getBoolean(KEY_READER_SCREEN_ON, true)
+
 	val isImagesProxyEnabled: Boolean
 		get() = prefs.getBoolean(KEY_IMAGES_PROXY, false)
 
@@ -460,6 +463,7 @@ class AppSettings @Inject constructor(@ApplicationContext context: Context) {
 		const val KEY_READER_BAR = "reader_bar"
 		const val KEY_READER_SLIDER = "reader_slider"
 		const val KEY_READER_BACKGROUND = "reader_background"
+		const val KEY_READER_SCREEN_ON = "reader_screen_on"
 		const val KEY_SHORTCUTS = "dynamic_shortcuts"
 		const val KEY_READER_TAPS_LTR = "reader_taps_ltr"
 		const val KEY_LOCAL_LIST_ORDER = "local_order"

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

@@ -137,6 +137,7 @@ class ReaderActivity :
 			onLoadingStateChanged(viewModel.isLoading.value)
 		}
 		viewModel.isScreenshotsBlockEnabled.observe(this, this::setWindowSecure)
+		viewModel.isKeepScreenOnEnabled.observe(this, this::setKeepScreenOn)
 		viewModel.isInfoBarEnabled.observe(this, ::onReaderBarChanged)
 		viewModel.isBookmarkAdded.observe(this, this::onBookmarkStateChanged)
 		viewModel.onShowToast.observeEvent(this) { msgId ->
@@ -304,6 +305,14 @@ class ReaderActivity :
 		}
 	}
 
+	private fun setKeepScreenOn(isKeep: Boolean) {
+		if (isKeep) {
+			window.addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON)
+		} else {
+			window.clearFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON)
+		}
+	}
+
 	private fun setUiIsVisible(isUiVisible: Boolean) {
 		if (viewBinding.appbarTop.isVisible != isUiVisible) {
 			if (isAnimationsEnabled) {

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

@@ -113,6 +113,12 @@ class ReaderViewModel @Inject constructor(
 		valueProducer = { isReaderBarEnabled },
 	)
 
+	val isKeepScreenOnEnabled = settings.observeAsStateFlow(
+		scope = viewModelScope + Dispatchers.Default,
+		key = AppSettings.KEY_READER_SCREEN_ON,
+		valueProducer = { isReaderKeepScreenOn },
+	)
+
 	val isWebtoonZoomEnabled = settings.observeAsStateFlow(
 		scope = viewModelScope + Dispatchers.Default,
 		key = AppSettings.KEY_WEBTOON_ZOOM,

app/src/main/res/layout/activity_reader.xml

@@ -4,8 +4,7 @@
 	xmlns:app="http://schemas.android.com/apk/res-auto"
 	xmlns:tools="http://schemas.android.com/tools"
 	android:layout_width="match_parent"
-	android:layout_height="match_parent"
-	android:keepScreenOn="true">
+	android:layout_height="match_parent">
 
 	<androidx.fragment.app.FragmentContainerView
 		android:id="@+id/container"

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

@@ -489,4 +489,6 @@
 	<string name="zoom_in">Zoom in</string>
 	<string name="reader_zoom_buttons">Show zoom buttons</string>
 	<string name="reader_zoom_buttons_summary">Whether to show zoom control buttons in the bottom right corner</string>
+	<string name="keep_screen_on">Keep screen on</string>
+	<string name="keep_screen_on_summary">Do not turn the screen off while you\'re reading manga</string>
 </resources>

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

@@ -78,13 +78,19 @@
 		android:summary="@string/show_pages_numbers_summary"
 		android:title="@string/show_pages_numbers" />
 
+	<SwitchPreferenceCompat
+		android:defaultValue="true"
+		android:key="reader_screen_on"
+		android:summary="@string/keep_screen_on_summary"
+		android:title="@string/keep_screen_on"
+		app:allowDividerAbove="true" />
+
 	<ListPreference
 		android:defaultValue="allow"
 		android:entries="@array/screenshots_policy"
 		android:entryValues="@array/values_screenshots_policy"
 		android:key="screenshots_policy"
 		android:title="@string/screenshots_policy"
-		app:allowDividerAbove="true"
 		app:useSimpleSummaryProvider="true" />
 
 	<ListPreference