Cubic reader scroll speed

app/src/main/kotlin/org/koitharu/kotatsu/browser/cloudflare/CloudFlareActivity.kt

@@ -48,8 +48,8 @@ class CloudFlareActivity : BaseActivity<ActivityBrowserBinding>(), CloudFlareCal
 		if (!catchingWebViewUnavailability {
 				setContentView(
 					ActivityBrowserBinding.inflate(
-						layoutInflater
-					)
+						layoutInflater,
+					),
 				)
 			}) {
 			return
@@ -82,9 +82,11 @@ class CloudFlareActivity : BaseActivity<ActivityBrowserBinding>(), CloudFlareCal
 	}
 
 	override fun onDestroy() {
-		viewBinding.webView.run {
-			stopLoading()
-			destroy()
+		runCatching {
+			viewBinding.webView
+		}.onSuccess {
+			it.stopLoading()
+			it.destroy()
 		}
 		super.onDestroy()
 	}

app/src/main/kotlin/org/koitharu/kotatsu/core/ui/widgets/CubicSlider.kt

@@ -0,0 +1,74 @@
+package org.koitharu.kotatsu.core.ui.widgets
+
+import android.content.Context
+import android.util.ArrayMap
+import android.util.AttributeSet
+import com.google.android.material.slider.Slider
+import kotlin.math.cbrt
+import kotlin.math.pow
+
+class CubicSlider @JvmOverloads constructor(
+	context: Context,
+	attrs: AttributeSet? = null,
+) : Slider(context, attrs) {
+
+	private val changeListeners = ArrayMap<OnChangeListener, OnChangeListenerMapper>(1)
+
+	override fun setValue(value: Float) {
+		super.setValue(value.unmap())
+	}
+
+	override fun getValue(): Float {
+		return super.getValue().map()
+	}
+
+	override fun getValueFrom(): Float {
+		return super.getValueFrom().map()
+	}
+
+	override fun setValueFrom(valueFrom: Float) {
+		super.setValueFrom(valueFrom.unmap())
+	}
+
+	override fun getValueTo(): Float {
+		return super.getValueTo().map()
+	}
+
+	override fun setValueTo(valueTo: Float) {
+		super.setValueTo(valueTo.unmap())
+	}
+
+	override fun addOnChangeListener(listener: OnChangeListener) {
+		val mapper = OnChangeListenerMapper(listener)
+		super.addOnChangeListener(mapper)
+		changeListeners[listener] = mapper
+	}
+
+	override fun removeOnChangeListener(listener: OnChangeListener) {
+		changeListeners.remove(listener)?.let {
+			super.removeOnChangeListener(it)
+		}
+	}
+
+	override fun clearOnChangeListeners() {
+		super.clearOnChangeListeners()
+		changeListeners.clear()
+	}
+
+	private fun Float.map(): Float {
+		return this.pow(3)
+	}
+
+	private fun Float.unmap(): Float {
+		return cbrt(this)
+	}
+
+	private inner class OnChangeListenerMapper(
+		private val delegate: OnChangeListener,
+	) : OnChangeListener {
+
+		override fun onValueChange(slider: Slider, value: Float, fromUser: Boolean) {
+			delegate.onValueChange(slider, value.map(), fromUser)
+		}
+	}
+}

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

@@ -128,7 +128,7 @@ class ReaderConfigSheet :
 		when (buttonView.id) {
 			R.id.switch_scroll_timer -> {
 				findCallback()?.isAutoScrollEnabled = isChecked
-				requireViewBinding().labelTimer.isVisible = isChecked
+				requireViewBinding().layoutTimer.isVisible = isChecked
 				requireViewBinding().sliderTimer.isVisible = isChecked
 			}
 		}
@@ -159,6 +159,7 @@ class ReaderConfigSheet :
 		if (fromUser) {
 			settings.readerAutoscrollSpeed = value
 		}
+		(viewBinding ?: return).labelTimerValue.text = getString(R.string.speed_value, value * 10f)
 	}
 
 	override fun onActivityResult(result: Uri?) {

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

@@ -119,18 +119,35 @@
 				android:textColor="?colorOnSurfaceVariant"
 				app:drawableStartCompat="@drawable/ic_timer" />
 
-			<TextView
-				android:id="@+id/label_timer"
+			<LinearLayout
+				android:id="@+id/layout_timer"
 				android:layout_width="match_parent"
 				android:layout_height="wrap_content"
 				android:layout_marginHorizontal="@dimen/margin_normal"
-				android:layout_marginTop="@dimen/margin_small"
-				android:text="@string/speed"
-				android:textAppearance="?attr/textAppearanceBodySmall"
+				android:layout_marginTop="@dimen/margin_normal"
+				android:textAppearance="?textAppearanceTitleSmall"
 				android:visibility="gone"
-				tools:visibility="visible" />
+				tools:visibility="visible">
+
+				<TextView
+					android:id="@+id/label_timer"
+					android:layout_width="0dp"
+					android:layout_height="wrap_content"
+					android:layout_weight="1"
+					android:text="@string/speed"
+					android:textAppearance="?attr/textAppearanceTitleSmall" />
+
+				<TextView
+					android:id="@+id/label_timer_value"
+					android:layout_width="wrap_content"
+					android:layout_height="wrap_content"
+					android:layout_marginStart="@dimen/margin_small"
+					android:textAppearance="?attr/textAppearanceBodySmall"
+					tools:text="x0.5" />
+
+			</LinearLayout>
 
-			<com.google.android.material.slider.Slider
+			<org.koitharu.kotatsu.core.ui.widgets.CubicSlider
 				android:id="@+id/slider_timer"
 				android:layout_width="match_parent"
 				android:layout_height="wrap_content"

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

@@ -510,4 +510,5 @@
 	<string name="periodic_backups_enable">Enable periodic backups</string>
 	<string name="backups_output_directory">Backups output directory</string>
 	<string name="last_successful_backup">Last successful backup: %s</string>
+	<string name="speed_value">x%.1f</string>
 </resources>