Autoscroll in reader #204

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

@@ -35,6 +35,7 @@ import org.koitharu.kotatsu.databinding.ActivityReaderBinding
 import org.koitharu.kotatsu.parsers.model.Manga
 import org.koitharu.kotatsu.parsers.model.MangaChapter
 import org.koitharu.kotatsu.parsers.model.MangaPage
+import org.koitharu.kotatsu.reader.ui.config.PageSwitchTimer
 import org.koitharu.kotatsu.reader.ui.config.ReaderConfigBottomSheet
 import org.koitharu.kotatsu.reader.ui.pager.ReaderUiState
 import org.koitharu.kotatsu.reader.ui.thumbnails.OnPageSelectListener
@@ -65,6 +66,13 @@ class ReaderActivity :
 		)
 	}
 
+	override var pageSwitchDelay: Float
+		get() = pageSwitchTimer.delaySec
+		set(value) {
+			pageSwitchTimer.delaySec = value
+		}
+
+	private lateinit var pageSwitchTimer: PageSwitchTimer
 	private lateinit var touchHelper: GridTouchHelper
 	private lateinit var controlDelegate: ReaderControlDelegate
 	private var gestureInsets: Insets = Insets.NONE
@@ -77,6 +85,7 @@ class ReaderActivity :
 		readerManager = ReaderManager(supportFragmentManager, R.id.container)
 		supportActionBar?.setDisplayHomeAsUpEnabled(true)
 		touchHelper = GridTouchHelper(this, this)
+		pageSwitchTimer = PageSwitchTimer(this, this)
 		controlDelegate = ReaderControlDelegate(lifecycleScope, settings, this)
 		binding.toolbarBottom.setOnMenuItemClickListener(::onOptionsItemSelected)
 		binding.slider.setLabelFormatter(PageLabelFormatter())
@@ -100,6 +109,11 @@ class ReaderActivity :
 		}
 	}
 
+	override fun onUserInteraction() {
+		super.onUserInteraction()
+		pageSwitchTimer.onUserInteraction()
+	}
+
 	private fun onInitReader(mode: ReaderMode) {
 		if (readerManager.currentMode != mode) {
 			readerManager.replace(mode)

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

@@ -15,7 +15,7 @@ import org.koitharu.kotatsu.utils.GridTouchHelper
 class ReaderControlDelegate(
 	scope: LifecycleCoroutineScope,
 	settings: AppSettings,
-	private val listener: OnInteractionListener
+	private val listener: OnInteractionListener,
 ) {
 
 	private var isTapSwitchEnabled: Boolean = true
@@ -72,14 +72,16 @@ class ReaderControlDelegate(
 		KeyEvent.KEYCODE_PAGE_DOWN,
 		KeyEvent.KEYCODE_SYSTEM_NAVIGATION_DOWN,
 		KeyEvent.KEYCODE_DPAD_DOWN,
-		KeyEvent.KEYCODE_DPAD_RIGHT -> {
+		KeyEvent.KEYCODE_DPAD_RIGHT,
+		-> {
 			listener.switchPageBy(1)
 			true
 		}
 		KeyEvent.KEYCODE_PAGE_UP,
 		KeyEvent.KEYCODE_SYSTEM_NAVIGATION_UP,
 		KeyEvent.KEYCODE_DPAD_UP,
-		KeyEvent.KEYCODE_DPAD_LEFT -> {
+		KeyEvent.KEYCODE_DPAD_LEFT,
+		-> {
 			listener.switchPageBy(-1)
 			true
 		}
@@ -103,4 +105,4 @@ class ReaderControlDelegate(
 
 		fun toggleUiVisibility()
 	}
-}
+}

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

@@ -0,0 +1,74 @@
+package org.koitharu.kotatsu.reader.ui.config
+
+import android.content.res.Resources
+import androidx.lifecycle.Lifecycle
+import androidx.lifecycle.LifecycleOwner
+import androidx.lifecycle.coroutineScope
+import androidx.lifecycle.repeatOnLifecycle
+import com.google.android.material.slider.LabelFormatter
+import kotlin.math.roundToLong
+import kotlinx.coroutines.Job
+import kotlinx.coroutines.delay
+import kotlinx.coroutines.isActive
+import kotlinx.coroutines.launch
+import org.koitharu.kotatsu.R
+import org.koitharu.kotatsu.parsers.util.format
+import org.koitharu.kotatsu.reader.ui.ReaderControlDelegate
+
+class PageSwitchTimer(
+	private val listener: ReaderControlDelegate.OnInteractionListener,
+	private val lifecycleOwner: LifecycleOwner,
+) {
+
+	var delaySec: Float = 0f
+		set(value) {
+			field = value
+			delayMs = mapDelay(value)
+			restartJob()
+		}
+	private var delayMs = 0L
+
+	fun onUserInteraction() {
+		restartJob()
+	}
+
+	private var job: Job? = null
+
+	private fun restartJob() {
+		job?.cancel()
+		if (delayMs == 0L) {
+			job = null
+			return
+		}
+		job = lifecycleOwner.lifecycle.coroutineScope.launch {
+			// FIXME: pause when bs is opened
+			lifecycleOwner.repeatOnLifecycle(Lifecycle.State.RESUMED) {
+				while (isActive) {
+					delay(delayMs)
+					listener.switchPageBy(1)
+				}
+			}
+		}
+	}
+
+	class DelayLabelFormatter(resources: Resources) : LabelFormatter {
+
+		private val textOff = resources.getString(R.string.off_short)
+		private val textSec = resources.getString(R.string.seconds_pattern)
+
+		override fun getFormattedValue(value: Float): String {
+			val ms = mapDelay(value)
+			return if (ms == 0L) textOff else textSec.format((ms / 1000.0).format(1))
+		}
+	}
+
+	companion object {
+
+		private const val DELAY_MIN = 2000L
+
+		fun mapDelay(value: Float): Long {
+			val delay = (value * 1000L).roundToLong()
+			return if (delay < DELAY_MIN) 0L else delay
+		}
+	}
+}

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

@@ -11,6 +11,7 @@ import androidx.fragment.app.FragmentManager
 import androidx.fragment.app.activityViewModels
 import androidx.lifecycle.flowWithLifecycle
 import com.google.android.material.button.MaterialButtonToggleGroup
+import com.google.android.material.slider.Slider
 import kotlinx.coroutines.flow.launchIn
 import kotlinx.coroutines.flow.onEach
 import org.koitharu.kotatsu.R
@@ -28,7 +29,8 @@ class ReaderConfigBottomSheet :
 	BaseBottomSheet<SheetReaderConfigBinding>(),
 	ActivityResultCallback<Uri?>,
 	View.OnClickListener,
-	MaterialButtonToggleGroup.OnButtonCheckedListener {
+	MaterialButtonToggleGroup.OnButtonCheckedListener,
+	Slider.OnSliderTouchListener {
 
 	private val viewModel by activityViewModels<ReaderViewModel>()
 	private val savePageRequest = registerForActivityResult(PageSaveContract(), this)
@@ -57,6 +59,12 @@ class ReaderConfigBottomSheet :
 		binding.buttonSavePage.setOnClickListener(this)
 		binding.buttonScreenRotate.setOnClickListener(this)
 		binding.buttonSettings.setOnClickListener(this)
+		binding.sliderTimer.addOnSliderTouchListener(this)
+		binding.sliderTimer.setLabelFormatter(PageSwitchTimer.DelayLabelFormatter(view.resources))
+
+		findCallback()?.run {
+			binding.sliderTimer.value = pageSwitchDelay
+		}
 	}
 
 	override fun onClick(v: View) {
@@ -92,6 +100,12 @@ class ReaderConfigBottomSheet :
 		mode = newMode
 	}
 
+	override fun onStartTrackingTouch(slider: Slider) = Unit
+
+	override fun onStopTrackingTouch(slider: Slider) {
+		findCallback()?.pageSwitchDelay = slider.value
+	}
+
 	override fun onActivityResult(uri: Uri?) {
 		viewModel.onActivityResult(uri)
 		dismissAllowingStateLoss()
@@ -113,6 +127,8 @@ class ReaderConfigBottomSheet :
 
 	interface Callback {
 
+		var pageSwitchDelay: Float
+
 		fun onReaderModeChanged(mode: ReaderMode)
 	}
 

app/src/main/res/drawable/ic_timer.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+<vector
+	xmlns:android="http://schemas.android.com/apk/res/android"
+	android:width="24dp"
+	android:height="24dp"
+	android:tint="?attr/colorControlNormal"
+	android:viewportWidth="24"
+	android:viewportHeight="24">
+	<path
+		android:fillColor="#000"
+		android:pathData="M12,20A7,7 0 0,1 5,13A7,7 0 0,1 12,6A7,7 0 0,1 19,13A7,7 0 0,1 12,20M19.03,7.39L20.45,5.97C20,5.46 19.55,5 19.04,4.56L17.62,6C16.07,4.74 14.12,4 12,4A9,9 0 0,0 3,13A9,9 0 0,0 12,22C17,22 21,17.97 21,13C21,10.88 20.26,8.93 19.03,7.39M11,14H13V8H11M15,1H9V3H15V1Z" />
+</vector>

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

@@ -27,24 +27,24 @@
 				android:id="@+id/button_save_page"
 				android:layout_width="match_parent"
 				android:layout_height="?android:listPreferredItemHeightSmall"
-				android:drawableStart="@drawable/ic_save"
 				android:drawablePadding="?android:listPreferredItemPaddingStart"
 				android:paddingStart="?android:listPreferredItemPaddingStart"
 				android:paddingEnd="?android:listPreferredItemPaddingEnd"
 				android:text="@string/save_page"
-				android:textAppearance="?attr/textAppearanceButton" />
+				android:textAppearance="?attr/textAppearanceButton"
+				app:drawableStartCompat="@drawable/ic_save" />
 
 			<org.koitharu.kotatsu.base.ui.widgets.ListItemTextView
 				android:id="@+id/button_screen_rotate"
 				android:layout_width="match_parent"
 				android:layout_height="?android:listPreferredItemHeightSmall"
-				android:drawableStart="@drawable/ic_screen_rotation"
 				android:drawablePadding="?android:listPreferredItemPaddingStart"
 				android:paddingStart="?android:listPreferredItemPaddingStart"
 				android:paddingEnd="?android:listPreferredItemPaddingEnd"
 				android:text="@string/rotate_screen"
 				android:textAppearance="?attr/textAppearanceButton"
 				android:visibility="gone"
+				app:drawableStartCompat="@drawable/ic_screen_rotation"
 				tools:visibility="visible" />
 
 			<TextView
@@ -62,7 +62,9 @@
 				android:layout_marginHorizontal="@dimen/margin_normal"
 				android:layout_marginTop="@dimen/margin_small"
 				android:baselineAligned="false"
-				android:orientation="horizontal">
+				android:orientation="horizontal"
+				app:selectionRequired="true"
+				app:singleSelection="true">
 
 				<com.google.android.material.button.MaterialButton
 					android:id="@+id/button_standard"
@@ -101,17 +103,46 @@
 				android:text="@string/reader_mode_hint"
 				android:textAppearance="?attr/textAppearanceBodySmall" />
 
+			<LinearLayout
+				android:layout_width="match_parent"
+				android:layout_height="wrap_content"
+				android:layout_marginTop="@dimen/margin_normal"
+				android:baselineAligned="false"
+				android:gravity="center_vertical"
+				android:minHeight="?android:listPreferredItemHeightSmall"
+				android:orientation="horizontal"
+				android:paddingStart="?android:listPreferredItemPaddingStart"
+				android:paddingEnd="?android:listPreferredItemPaddingEnd">
+
+				<TextView
+					android:layout_width="wrap_content"
+					android:layout_height="wrap_content"
+					android:drawablePadding="?android:listPreferredItemPaddingStart"
+					android:text="@string/automatic_scroll"
+					android:textAppearance="?attr/textAppearanceButton"
+					app:drawableStartCompat="@drawable/ic_timer" />
+
+				<com.google.android.material.slider.Slider
+					android:id="@+id/slider_timer"
+					android:layout_width="match_parent"
+					android:layout_height="wrap_content"
+					android:layout_marginStart="@dimen/margin_normal"
+					android:valueFrom="0"
+					android:valueTo="20"
+					app:labelBehavior="floating" />
+
+			</LinearLayout>
+
 			<org.koitharu.kotatsu.base.ui.widgets.ListItemTextView
 				android:id="@+id/button_settings"
 				android:layout_width="match_parent"
 				android:layout_height="?android:listPreferredItemHeightSmall"
-				android:layout_marginTop="@dimen/margin_normal"
-				android:drawableStart="@drawable/ic_settings"
 				android:drawablePadding="?android:listPreferredItemPaddingStart"
 				android:paddingStart="?android:listPreferredItemPaddingStart"
 				android:paddingEnd="?android:listPreferredItemPaddingEnd"
 				android:text="@string/settings"
-				android:textAppearance="?attr/textAppearanceButton" />
+				android:textAppearance="?attr/textAppearanceButton"
+				app:drawableStartCompat="@drawable/ic_settings" />
 
 		</LinearLayout>
 

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

@@ -361,4 +361,7 @@
 	<string name="incognito_mode">Incognito mode</string>
 	<string name="app_update_available_s">Application update available: %s</string>
 	<string name="no_chapters">No chapters</string>
+	<string name="automatic_scroll">Automatic scroll</string>
+	<string name="off_short">Off</string>
+	<string name="seconds_pattern">%ss</string>
 </resources>