Refactor and tune FastScroller

app/src/main/java/org/koitharu/kotatsu/base/ui/list/fastscroll/BubbleAnimator.kt

@@ -0,0 +1,82 @@
+package org.koitharu.kotatsu.base.ui.list.fastscroll
+
+import android.animation.Animator
+import android.animation.AnimatorListenerAdapter
+import android.view.View
+import android.view.ViewAnimationUtils
+import android.view.animation.AccelerateInterpolator
+import android.view.animation.DecelerateInterpolator
+import androidx.core.view.isInvisible
+import androidx.core.view.isVisible
+import org.koitharu.kotatsu.utils.ext.animatorDurationScale
+import org.koitharu.kotatsu.utils.ext.measureWidth
+import kotlin.math.hypot
+
+class BubbleAnimator(
+	private val bubble: View,
+) {
+
+	private val animationDuration = (bubble.resources.getInteger(android.R.integer.config_shortAnimTime) *
+		bubble.context.animatorDurationScale).toLong()
+	private var animator: Animator? = null
+	private var isHiding = false
+
+	fun show() {
+		if (bubble.isVisible && !isHiding) {
+			return
+		}
+		isHiding = false
+		animator?.cancel()
+		animator = ViewAnimationUtils.createCircularReveal(
+			bubble,
+			bubble.measureWidth(),
+			bubble.measuredHeight,
+			0f,
+			hypot(bubble.width.toDouble(), bubble.height.toDouble()).toFloat(),
+		).apply {
+			bubble.isVisible = true
+			duration = animationDuration
+			interpolator = DecelerateInterpolator()
+			start()
+		}
+	}
+
+	fun hide() {
+		if (!bubble.isVisible || isHiding) {
+			return
+		}
+		animator?.cancel()
+		isHiding = true
+		animator = ViewAnimationUtils.createCircularReveal(
+			bubble,
+			bubble.width,
+			bubble.height,
+			hypot(bubble.width.toDouble(), bubble.height.toDouble()).toFloat(),
+			0f,
+		).apply {
+			duration = animationDuration
+			interpolator = AccelerateInterpolator()
+			addListener(HideListener())
+			start()
+		}
+	}
+
+	private inner class HideListener : AnimatorListenerAdapter() {
+
+		private var isCancelled = false
+
+		override fun onAnimationCancel(animation: Animator?) {
+			super.onAnimationCancel(animation)
+			isCancelled = true
+		}
+
+		override fun onAnimationEnd(animation: Animator?) {
+			super.onAnimationEnd(animation)
+			if (!isCancelled && animation === this@BubbleAnimator.animator) {
+				bubble.isInvisible = true
+				isHiding = false
+				this@BubbleAnimator.animator = null
+			}
+		}
+	}
+}

app/src/main/java/org/koitharu/kotatsu/base/ui/list/fastscroll/FastScrollRecyclerView.kt

@@ -0,0 +1,79 @@
+package org.koitharu.kotatsu.base.ui.list.fastscroll
+
+import android.content.Context
+import android.util.AttributeSet
+import android.view.ViewGroup
+import androidx.annotation.AttrRes
+import androidx.annotation.ColorInt
+import androidx.recyclerview.widget.RecyclerView
+import androidx.swiperefreshlayout.widget.SwipeRefreshLayout
+import org.koitharu.kotatsu.R
+import org.koitharu.kotatsu.utils.ext.parents
+
+class FastScrollRecyclerView @JvmOverloads constructor(
+	context: Context,
+	attrs: AttributeSet? = null,
+	@AttrRes defStyleAttr: Int = androidx.recyclerview.R.attr.recyclerViewStyle,
+) : RecyclerView(context, attrs, defStyleAttr) {
+
+	val fastScroller = FastScroller(context, attrs)
+
+	init {
+		fastScroller.id = R.id.fast_scroller
+		fastScroller.layoutParams = ViewGroup.LayoutParams(
+			ViewGroup.LayoutParams.WRAP_CONTENT,
+			ViewGroup.LayoutParams.MATCH_PARENT,
+		)
+	}
+
+	override fun setAdapter(adapter: Adapter<*>?) {
+		super.setAdapter(adapter)
+		fastScroller.setSectionIndexer(adapter as? FastScroller.SectionIndexer)
+	}
+
+	override fun setVisibility(visibility: Int) {
+		super.setVisibility(visibility)
+		fastScroller.visibility = visibility
+	}
+
+	fun setFastScrollListener(fastScrollListener: FastScroller.FastScrollListener?) =
+		fastScroller.setFastScrollListener(fastScrollListener)
+
+	fun setFastScrollEnabled(enabled: Boolean) {
+		fastScroller.isEnabled = enabled
+	}
+
+	fun setHideScrollbar(hideScrollbar: Boolean) = fastScroller.setHideScrollbar(hideScrollbar)
+
+	fun setTrackVisible(visible: Boolean) = fastScroller.setTrackVisible(visible)
+
+	fun setTrackColor(@ColorInt color: Int) = fastScroller.setTrackColor(color)
+
+	fun setHandleColor(@ColorInt color: Int) = fastScroller.setHandleColor(color)
+
+	@JvmOverloads
+	fun setBubbleVisible(visible: Boolean, always: Boolean = false) = fastScroller.setBubbleVisible(visible, always)
+
+	fun setBubbleColor(@ColorInt color: Int) = fastScroller.setBubbleColor(color)
+
+	fun setBubbleTextColor(@ColorInt color: Int) = fastScroller.setBubbleTextColor(color)
+
+	fun setBubbleTextSize(size: Int) = fastScroller.setBubbleTextSize(size)
+
+	override fun onAttachedToWindow() {
+		super.onAttachedToWindow()
+		fastScroller.attachRecyclerView(this)
+		for (p in parents) {
+			if (p is SwipeRefreshLayout) {
+				fastScroller.setSwipeRefreshLayout(p)
+				return
+			}
+		}
+	}
+
+	override fun onDetachedFromWindow() {
+		fastScroller.detachRecyclerView()
+		fastScroller.setSwipeRefreshLayout(null)
+		super.onDetachedFromWindow()
+	}
+}

app/src/main/java/org/koitharu/kotatsu/base/ui/list/fastscroll/FastScroller.kt

@@ -1,23 +1,5 @@
-/*
+package org.koitharu.kotatsu.base.ui.list.fastscroll
- * Copyright 2022 Randy Webster. All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 
-package org.koitharu.kotatsu.base.ui.widgets
-
-import android.animation.Animator
-import android.animation.AnimatorListenerAdapter
 import android.annotation.SuppressLint
 import android.content.Context
 import android.content.res.TypedArray
@@ -25,54 +7,43 @@ import android.graphics.Color
 import android.graphics.drawable.Drawable
 import android.util.AttributeSet
 import android.util.TypedValue
-import android.view.MotionEvent
+import android.view.*
-import android.view.View
-import android.view.ViewGroup
-import android.view.ViewPropertyAnimator
 import android.widget.*
-import android.widget.RelativeLayout.*
+import androidx.annotation.*
-import androidx.annotation.ColorInt
-import androidx.annotation.DimenRes
-import androidx.annotation.DrawableRes
-import androidx.annotation.StyleableRes
 import androidx.constraintlayout.widget.ConstraintLayout
 import androidx.constraintlayout.widget.ConstraintSet
 import androidx.coordinatorlayout.widget.CoordinatorLayout
 import androidx.core.content.ContextCompat
 import androidx.core.content.withStyledAttributes
 import androidx.core.view.GravityCompat
+import androidx.core.view.isGone
 import androidx.core.view.isVisible
 import androidx.recyclerview.widget.RecyclerView
 import androidx.swiperefreshlayout.widget.SwipeRefreshLayout
 import org.koitharu.kotatsu.R
+import org.koitharu.kotatsu.databinding.FastScrollerBinding
 import org.koitharu.kotatsu.utils.ext.*
 import kotlin.math.roundToInt
+import com.google.android.material.R as materialR
 
-private const val BUBBLE_ANIM_DURATION = 100L
 private const val SCROLLBAR_HIDE_DELAY = 1000L
 private const val TRACK_SNAP_RANGE = 5
 
 @Suppress("MemberVisibilityCanBePrivate", "unused")
-class FastScroller : LinearLayout {
+class FastScroller @JvmOverloads constructor(
+	context: Context,
+	attrs: AttributeSet? = null,
+	@AttrRes defStyleAttr: Int = R.attr.fastScrollerStyle,
+) : LinearLayout(context, attrs, defStyleAttr) {
 
-	enum class Size(@DrawableRes val drawableId: Int, @DimenRes val textSizeId: Int) {
+	enum class BubbleSize(@DrawableRes val drawableId: Int, @DimenRes val textSizeId: Int) {
 		NORMAL(R.drawable.fastscroll_bubble, R.dimen.fastscroll_bubble_text_size),
 		SMALL(R.drawable.fastscroll_bubble_small, R.dimen.fastscroll_bubble_text_size_small)
 	}
 
-	private val Size.textSize get() = resources.getDimension(textSizeId)
+	private val binding = FastScrollerBinding.inflate(LayoutInflater.from(context), this)
 
-	private val animationDuration = (context.resources.getInteger(R.integer.config_defaultAnimTime) *
+	private val scrollbarPaddingEnd = context.resources.getDimension(R.dimen.fastscroll_scrollbar_padding_end)
-		context.animatorDurationScale).toLong()
-
-	private val bubbleView: TextView by lazy { findViewById(R.id.fastscroll_bubble) }
-	private val handleView: ImageView by lazy { findViewById(R.id.fastscroll_handle) }
-	private val trackView: ImageView by lazy { findViewById(R.id.fastscroll_track) }
-	private val scrollbar: View by lazy { findViewById(R.id.fastscroll_scrollbar) }
-
-	private val scrollbarPaddingEnd by lazy {
-		resources.getDimensionPixelSize(R.dimen.fastscroll_scrollbar_padding_end).toFloat()
-	}
 
 	@ColorInt
 	private var bubbleColor = 0
@@ -86,14 +57,14 @@ class FastScroller : LinearLayout {
 	private var hideScrollbar = true
 	private var showBubble = true
 	private var showBubbleAlways = false
-	private var bubbleSize = Size.NORMAL
+	private var bubbleSize = BubbleSize.NORMAL
 	private var bubbleImage: Drawable? = null
 	private var handleImage: Drawable? = null
 	private var trackImage: Drawable? = null
 	private var recyclerView: RecyclerView? = null
 	private var swipeRefreshLayout: SwipeRefreshLayout? = null
-	private var scrollbarAnimator: ViewPropertyAnimator? = null
+	private val scrollbarAnimator = ScrollbarAnimator(binding.scrollbar, scrollbarPaddingEnd)
-	private var bubbleAnimator: ViewPropertyAnimator? = null
+	private val bubbleAnimator = BubbleAnimator(binding.bubble)
 
 	private var fastScrollListener: FastScrollListener? = null
 	private var sectionIndexer: SectionIndexer? = null
@@ -103,19 +74,15 @@ class FastScroller : LinearLayout {
 		hideScrollbar()
 	}
 
-	private val alphaAnimatorListener = object : AnimatorListenerAdapter() {
-		/* adapter required for new alpha value to stick */
-	}
-
 	private val scrollListener: RecyclerView.OnScrollListener = object : RecyclerView.OnScrollListener() {
 		override fun onScrolled(recyclerView: RecyclerView, dx: Int, dy: Int) {
-			if (!handleView.isSelected && isEnabled) {
+			if (!binding.thumb.isSelected && isEnabled) {
 				val y = recyclerView.scrollProportion
 				setViewPositions(y)
 
 				if (showBubbleAlways) {
 					val targetPos = getRecyclerViewTargetPosition(y)
-					sectionIndexer?.let { bubbleView.text = it.getSectionText(targetPos) }
+					sectionIndexer?.let { binding.bubble.text = it.getSectionText(recyclerView.context, targetPos) }
 				}
 			}
 
@@ -133,12 +100,10 @@ class FastScroller : LinearLayout {
 				when (newState) {
 					RecyclerView.SCROLL_STATE_DRAGGING -> {
 						handler.removeCallbacks(scrollbarHider)
-						scrollbarAnimator?.cancel()
+						showScrollbar()
-
-						if (!scrollbar.isVisible) showScrollbar()
 						if (showBubbleAlways && sectionIndexer != null) showBubble()
 					}
-					RecyclerView.SCROLL_STATE_IDLE -> if (hideScrollbar && !handleView.isSelected) {
+					RecyclerView.SCROLL_STATE_IDLE -> if (hideScrollbar && !binding.thumb.isSelected) {
 						handler.postDelayed(scrollbarHider, SCROLLBAR_HIDE_DELAY)
 					}
 				}
@@ -153,22 +118,42 @@ class FastScroller : LinearLayout {
 			return viewHeight * proportion
 		}
 
-	@JvmOverloads
+	init {
-	constructor(context: Context, size: Size = Size.NORMAL) : super(context) {
+		clipChildren = false
-		context.layout(size = size)
+		orientation = HORIZONTAL
-		layoutParams = LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.MATCH_PARENT)
+
+		@ColorInt var bubbleColor = context.getThemeColor(materialR.attr.colorControlNormal, Color.DKGRAY)
+		@ColorInt var handleColor = bubbleColor
+		@ColorInt var trackColor = context.getThemeColor(materialR.attr.colorOutline, Color.LTGRAY)
+		@ColorInt var textColor = context.getThemeColor(android.R.attr.textColorPrimaryInverse, Color.WHITE)
+
+		var showTrack = false
+
+		context.withStyledAttributes(attrs, R.styleable.FastScroller, defStyleAttr) {
+			bubbleColor = getColor(R.styleable.FastScroller_bubbleColor, bubbleColor)
+			handleColor = getColor(R.styleable.FastScroller_thumbColor, handleColor)
+			trackColor = getColor(R.styleable.FastScroller_trackColor, trackColor)
+			textColor = getColor(R.styleable.FastScroller_bubbleTextColor, textColor)
+			hideScrollbar = getBoolean(R.styleable.FastScroller_hideScrollbar, hideScrollbar)
+			showBubble = getBoolean(R.styleable.FastScroller_showBubble, showBubble)
+			showBubbleAlways = getBoolean(R.styleable.FastScroller_showBubbleAlways, showBubbleAlways)
+			showTrack = getBoolean(R.styleable.FastScroller_showTrack, showTrack)
+			bubbleSize = getBubbleSize(R.styleable.FastScroller_bubbleSize, BubbleSize.NORMAL)
+			val textSize = getDimension(R.styleable.FastScroller_bubbleTextSize, bubbleSize.textSize)
+			binding.bubble.setTextSize(TypedValue.COMPLEX_UNIT_PX, textSize)
+		}
+
+		setTrackColor(trackColor)
+		setHandleColor(handleColor)
+		setBubbleColor(bubbleColor)
+		setBubbleTextColor(textColor)
+		setHideScrollbar(hideScrollbar)
+		setBubbleVisible(showBubble, showBubbleAlways)
+		setTrackVisible(showTrack)
 	}
 
-	@JvmOverloads
+	override fun onSizeChanged(w: Int, h: Int, oldW: Int, oldH: Int) {
-	constructor(context: Context, attrs: AttributeSet?, defStyleAttr: Int = 0) : super(context, attrs, defStyleAttr) {
+		super.onSizeChanged(w, h, oldW, oldH)
-		context.layout(attrs)
-		layoutParams = attrs?.let { generateLayoutParams(it) } ?: LayoutParams(
-			LayoutParams.WRAP_CONTENT,
-			LayoutParams.MATCH_PARENT
-		)
-	}
-
-	override fun onSizeChanged(w: Int, h: Int, oldW: Int, oldH: Int) = super.onSizeChanged(w, h, oldW, oldH).also {
 		viewHeight = h
 	}
 
@@ -180,18 +165,15 @@ class FastScroller : LinearLayout {
 			setRecyclerViewPosition(y)
 		}
 
-		when (event.action) {
+		when (event.actionMasked) {
 			MotionEvent.ACTION_DOWN -> {
-				if (event.x < handleView.x - scrollbar.compatPaddingStart) return false
+				if (event.x.toInt() !in binding.scrollbar.left..binding.scrollbar.right) return false
 
 				requestDisallowInterceptTouchEvent(true)
 				setHandleSelected(true)
 
 				handler.removeCallbacks(scrollbarHider)
-				scrollbarAnimator?.cancel()
+				showScrollbar()
-				bubbleAnimator?.cancel()
-
-				if (!scrollbar.isVisible) showScrollbar()
 				if (showBubble && sectionIndexer != null) showBubble()
 
 				fastScrollListener?.onFastScrollStart(this)
@@ -224,7 +206,8 @@ class FastScroller : LinearLayout {
 	 *
 	 * @param enabled True if this view is enabled, false otherwise
 	 */
-	override fun setEnabled(enabled: Boolean) = super.setEnabled(enabled).also {
+	override fun setEnabled(enabled: Boolean) {
+		super.setEnabled(enabled)
 		isVisible = enabled
 	}
 
@@ -283,9 +266,9 @@ class FastScroller : LinearLayout {
 			}
 			is RelativeLayout -> layoutParams = (layoutParams as RelativeLayout.LayoutParams).apply {
 				height = 0
-				addRule(ALIGN_TOP, recyclerViewId)
+				addRule(RelativeLayout.ALIGN_TOP, recyclerViewId)
-				addRule(ALIGN_BOTTOM, recyclerViewId)
+				addRule(RelativeLayout.ALIGN_BOTTOM, recyclerViewId)
-				addRule(ALIGN_END, recyclerViewId)
+				addRule(RelativeLayout.ALIGN_END, recyclerViewId)
 				setMargins(0, marginTop, 0, marginBottom)
 			}
 			else -> throw IllegalArgumentException("Parent ViewGroup must be a ConstraintLayout, CoordinatorLayout, FrameLayout, or RelativeLayout")
@@ -302,6 +285,9 @@ class FastScroller : LinearLayout {
 	 * @see detachRecyclerView
 	 */
 	fun attachRecyclerView(recyclerView: RecyclerView) {
+		if (this.recyclerView != null) {
+			detachRecyclerView()
+		}
 		this.recyclerView = recyclerView
 
 		if (parent is ViewGroup) {
@@ -314,7 +300,7 @@ class FastScroller : LinearLayout {
 
 		recyclerView.addOnScrollListener(scrollListener)
 
-		// set initial positions for bubble and handle
+		// set initial positions for bubble and thumb
 		post { setViewPositions(this.recyclerView?.scrollProportion ?: 0f) }
 	}
 
@@ -365,7 +351,8 @@ class FastScroller : LinearLayout {
 	 */
 	fun setHideScrollbar(hideScrollbar: Boolean) {
 		if (this.hideScrollbar != hideScrollbar) {
-			scrollbar.isVisible = !hideScrollbar.also { this.hideScrollbar = it }
+			this.hideScrollbar = hideScrollbar
+			binding.scrollbar.isGone = hideScrollbar
 		}
 	}
 
@@ -375,7 +362,7 @@ class FastScroller : LinearLayout {
 	 * @param visible True to show scroll track, false to hide
 	 */
 	fun setTrackVisible(visible: Boolean) {
-		trackView.isVisible = visible
+		binding.track.isVisible = visible
 	}
 
 	/**
@@ -390,14 +377,14 @@ class FastScroller : LinearLayout {
 
 		trackImage?.let {
 			it.setTint(color)
-			trackView.setImageDrawable(it)
+			binding.track.setImageDrawable(it)
 		}
 	}
 
 	/**
-	 * Set the color of the scroll handle.
+	 * Set the color of the scroll thumb.
 	 *
-	 * @param color The color for the scroll handle
+	 * @param color The color for the scroll thumb
 	 */
 	fun setHandleColor(@ColorInt color: Int) {
 		handleColor = color
@@ -408,7 +395,7 @@ class FastScroller : LinearLayout {
 
 		handleImage?.let {
 			it.setTint(handleColor)
-			handleView.setImageDrawable(it)
+			binding.thumb.setImageDrawable(it)
 		}
 	}
 
@@ -416,7 +403,7 @@ class FastScroller : LinearLayout {
 	 * Show the section bubble while scrolling.
 	 *
 	 * @param visible True to show the bubble, false to hide
-	 * @param always  True to always show the bubble, false to only show on handle touch
+	 * @param always  True to always show the bubble, false to only show on thumb touch
 	 */
 	@JvmOverloads
 	fun setBubbleVisible(visible: Boolean, always: Boolean = false) {
@@ -438,7 +425,7 @@ class FastScroller : LinearLayout {
 
 		bubbleImage?.let {
 			it.setTint(bubbleColor)
-			bubbleView.background = it
+			binding.bubble.background = it
 		}
 	}
 
@@ -447,7 +434,7 @@ class FastScroller : LinearLayout {
 	 *
 	 * @param color The text color for the section bubble
 	 */
-	fun setBubbleTextColor(@ColorInt color: Int) = bubbleView.setTextColor(color)
+	fun setBubbleTextColor(@ColorInt color: Int) = binding.bubble.setTextColor(color)
 
 	/**
 	 * Set the scaled pixel text size of the section bubble.
@@ -455,15 +442,15 @@ class FastScroller : LinearLayout {
 	 * @param size The scaled pixel text size for the section bubble
 	 */
 	fun setBubbleTextSize(size: Int) {
-		bubbleView.textSize = size.toFloat()
+		binding.bubble.textSize = size.toFloat()
 	}
 
 	private fun getRecyclerViewTargetPosition(y: Float) = recyclerView?.let { recyclerView ->
 		val itemCount = recyclerView.adapter?.itemCount ?: 0
 
 		val proportion = when {
-			handleView.y == 0f -> 0f
+			binding.thumb.y == 0f -> 0f
-			handleView.y + handleHeight >= viewHeight - TRACK_SNAP_RANGE -> 1f
+			binding.thumb.y + handleHeight >= viewHeight - TRACK_SNAP_RANGE -> 1f
 			else -> y / viewHeight.toFloat()
 		}
 
@@ -477,139 +464,65 @@ class FastScroller : LinearLayout {
 	} ?: 0
 
 	private fun setRecyclerViewPosition(y: Float) {
-		recyclerView?.layoutManager?.let { layoutManager ->
+		val layoutManager = recyclerView?.layoutManager ?: return
-			val targetPos = getRecyclerViewTargetPosition(y)
+		val targetPos = getRecyclerViewTargetPosition(y)
-			layoutManager.scrollToPosition(targetPos)
+		layoutManager.scrollToPosition(targetPos)
-			if (showBubble) sectionIndexer?.let { bubbleView.text = it.getSectionText(targetPos) }
+		if (showBubble) sectionIndexer?.let { binding.bubble.text = it.getSectionText(context, targetPos) }
-		}
 	}
 
 	private fun setViewPositions(y: Float) {
-		bubbleHeight = bubbleView.measuredHeight
+		bubbleHeight = binding.bubble.measuredHeight
-		handleHeight = handleView.measuredHeight
+		handleHeight = binding.thumb.measuredHeight
 
 		val bubbleHandleHeight = bubbleHeight + handleHeight / 2f
 
 		if (showBubble && viewHeight >= bubbleHandleHeight) {
-			bubbleView.y = (y - bubbleHeight).coerceIn(0f, viewHeight - bubbleHandleHeight)
+			binding.bubble.y = (y - bubbleHeight).coerceIn(0f, viewHeight - bubbleHandleHeight)
 		}
 
 		if (viewHeight >= handleHeight) {
-			handleView.y = (y - handleHeight / 2).coerceIn(0f, viewHeight - handleHeight.toFloat())
+			binding.thumb.y = (y - handleHeight / 2).coerceIn(0f, viewHeight - handleHeight.toFloat())
 		}
 	}
 
 	private fun updateViewHeights() {
 		val measureSpec = MeasureSpec.makeMeasureSpec(MeasureSpec.UNSPECIFIED, MeasureSpec.UNSPECIFIED)
-		bubbleView.measure(measureSpec, measureSpec)
+		binding.bubble.measure(measureSpec, measureSpec)
-		bubbleHeight = bubbleView.measuredHeight
+		bubbleHeight = binding.bubble.measuredHeight
-		handleView.measure(measureSpec, measureSpec)
+		binding.thumb.measure(measureSpec, measureSpec)
-		handleHeight = handleView.measuredHeight
+		handleHeight = binding.thumb.measuredHeight
 	}
 
 	private fun showBubble() {
-		if (!bubbleView.isVisible) {
+		bubbleAnimator.show()
-			bubbleView.isVisible = true
-			bubbleAnimator = bubbleView.animate().alpha(1f)
-				.setDuration(BUBBLE_ANIM_DURATION)
-				.setListener(alphaAnimatorListener)
-		}
 	}
 
 	private fun hideBubble() {
-		if (bubbleView.isVisible) {
+		bubbleAnimator.hide()
-			bubbleAnimator = bubbleView.animate().alpha(0f)
-				.setDuration(BUBBLE_ANIM_DURATION)
-				.setListener(object : AnimatorListenerAdapter() {
-					override fun onAnimationEnd(animation: Animator) {
-						super.onAnimationEnd(animation)
-						bubbleView.isVisible = false
-						bubbleAnimator = null
-					}
-
-					override fun onAnimationCancel(animation: Animator) {
-						super.onAnimationCancel(animation)
-						bubbleView.isVisible = false
-						bubbleAnimator = null
-					}
-				})
-		}
 	}
 
 	private fun showScrollbar() {
 		if ((recyclerView?.computeVerticalScrollRange() ?: (0 - viewHeight)) > 0) {
-			scrollbar.translationX = scrollbarPaddingEnd
+			scrollbarAnimator.show()
-			scrollbar.isVisible = true
-			scrollbarAnimator = scrollbar.animate().translationX(0f).alpha(1f)
-				.setDuration(animationDuration)
-				.setListener(alphaAnimatorListener)
 		}
 	}
 
 	private fun hideScrollbar() {
-		scrollbarAnimator = scrollbar.animate().translationX(scrollbarPaddingEnd).alpha(0f)
+		scrollbarAnimator.hide()
-			.setDuration(animationDuration)
-			.setListener(object : AnimatorListenerAdapter() {
-				override fun onAnimationEnd(animation: Animator) {
-					super.onAnimationEnd(animation)
-					scrollbar.isVisible = false
-					scrollbarAnimator = null
-				}
-
-				override fun onAnimationCancel(animation: Animator) {
-					super.onAnimationCancel(animation)
-					scrollbar.isVisible = false
-					scrollbarAnimator = null
-				}
-			})
 	}
 
 	private fun setHandleSelected(selected: Boolean) {
-		handleView.isSelected = selected
+		binding.thumb.isSelected = selected
 		handleImage?.setTint(if (selected) bubbleColor else handleColor)
 	}
 
-	private fun TypedArray.getSize(@StyleableRes index: Int, defValue: Int) = getInt(index, defValue).let { ordinal ->
+	private fun TypedArray.getBubbleSize(@StyleableRes index: Int, defaultValue: BubbleSize): BubbleSize {
-		Size.values().find { it.ordinal == ordinal } ?: Size.NORMAL
+		val ordinal = getInt(index, -1)
+		return BubbleSize.values().getOrNull(ordinal) ?: defaultValue
 	}
 
-	private fun Context.layout(attrs: AttributeSet? = null, size: Size = Size.NORMAL) {
+	private val BubbleSize.textSize
-		inflate(this, R.layout.fast_scroller, this@FastScroller)
+		@Px get() = resources.getDimension(textSizeId)
-
-		clipChildren = false
-		orientation = HORIZONTAL
-
-		@ColorInt var bubbleColor = Color.GRAY
-		@ColorInt var handleColor = Color.DKGRAY
-		@ColorInt var trackColor = Color.LTGRAY
-		@ColorInt var textColor = Color.WHITE
-
-		var showTrack = false
-		var textSize = size.textSize
-
-		withStyledAttributes(attrs, R.styleable.FastScroller) {
-			bubbleColor = getColor(R.styleable.FastScroller_bubbleColor, bubbleColor)
-			handleColor = getColor(R.styleable.FastScroller_handleColor, handleColor)
-			trackColor = getColor(R.styleable.FastScroller_trackColor, trackColor)
-			textColor = getColor(R.styleable.FastScroller_bubbleTextColor, textColor)
-			hideScrollbar = getBoolean(R.styleable.FastScroller_hideScrollbar, hideScrollbar)
-			showBubble = getBoolean(R.styleable.FastScroller_showBubble, showBubble)
-			showBubbleAlways = getBoolean(R.styleable.FastScroller_showBubbleAlways, showBubbleAlways)
-			showTrack = getBoolean(R.styleable.FastScroller_showTrack, showTrack)
-			bubbleSize = getSize(R.styleable.FastScroller_bubbleSize, size.ordinal)
-			textSize = getDimension(R.styleable.FastScroller_bubbleTextSize, bubbleSize.textSize)
-		}
-
-		setTrackColor(trackColor)
-		setHandleColor(handleColor)
-		setBubbleColor(bubbleColor)
-		setBubbleTextColor(textColor)
-		setHideScrollbar(hideScrollbar)
-		setBubbleVisible(showBubble, showBubbleAlways)
-		setTrackVisible(showTrack)
-
-		bubbleView.setTextSize(TypedValue.COMPLEX_UNIT_PX, textSize)
-	}
 
 	interface FastScrollListener {
 
@@ -620,6 +533,6 @@ class FastScroller : LinearLayout {
 
 	interface SectionIndexer {
 
-		fun getSectionText(position: Int): CharSequence
+		fun getSectionText(context: Context, position: Int): CharSequence
 	}
 }

app/src/main/java/org/koitharu/kotatsu/base/ui/list/fastscroll/ScrollbarAnimator.kt

@@ -0,0 +1,69 @@
+package org.koitharu.kotatsu.base.ui.list.fastscroll
+
+import android.animation.Animator
+import android.animation.AnimatorListenerAdapter
+import android.view.View
+import android.view.ViewPropertyAnimator
+import androidx.core.view.isInvisible
+import androidx.core.view.isVisible
+import org.koitharu.kotatsu.R
+import org.koitharu.kotatsu.utils.ext.animatorDurationScale
+
+class ScrollbarAnimator(
+	private val scrollbar: View,
+	private val scrollbarPaddingEnd: Float,
+) {
+
+	private val animationDuration = (scrollbar.resources.getInteger(R.integer.config_defaultAnimTime) *
+		scrollbar.context.animatorDurationScale).toLong()
+	private var animator: ViewPropertyAnimator? = null
+	private var isHiding = false
+
+	fun show() {
+		if (scrollbar.isVisible && !isHiding) {
+			return
+		}
+		isHiding = false
+		animator?.cancel()
+		scrollbar.translationX = scrollbarPaddingEnd
+		scrollbar.isVisible = true
+		animator = scrollbar
+			.animate()
+			.translationX(0f)
+			.alpha(1f)
+			.setDuration(animationDuration)
+	}
+
+	fun hide() {
+		if (!scrollbar.isVisible || isHiding) {
+			return
+		}
+		animator?.cancel()
+		isHiding = true
+		animator = scrollbar
+			.animate()
+			.translationX(scrollbarPaddingEnd)
+			.alpha(0f)
+			.setDuration(animationDuration)
+			.setListener(HideListener())
+	}
+
+	private inner class HideListener : AnimatorListenerAdapter() {
+
+		private var isCancelled = false
+
+		override fun onAnimationCancel(animation: Animator?) {
+			super.onAnimationCancel(animation)
+			isCancelled = true
+		}
+
+		override fun onAnimationEnd(animation: Animator?) {
+			super.onAnimationEnd(animation)
+			if (!isCancelled && animation === this@ScrollbarAnimator.animator) {
+				scrollbar.isInvisible = true
+				isHiding = false
+				this@ScrollbarAnimator.animator = null
+			}
+		}
+	}
+}

app/src/main/java/org/koitharu/kotatsu/base/ui/widgets/FastScrollRecyclerView.kt

@@ -1,85 +0,0 @@
-/*
- * Copyright 2022 Randy Webster. All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package org.koitharu.kotatsu.base.ui.widgets
-
-import android.content.Context
-import android.util.AttributeSet
-import androidx.annotation.ColorInt
-import androidx.recyclerview.widget.RecyclerView
-import org.koitharu.kotatsu.R
-
-class FastScrollRecyclerView : RecyclerView {
-
-	private val fastScroller: FastScroller
-
-	constructor(context: Context) : super(context) {
-		fastScroller = context.layout()
-		layoutParams = LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT)
-	}
-
-	@JvmOverloads
-	constructor(context: Context, attrs: AttributeSet?, defStyleAttr: Int = 0) : super(context, attrs, defStyleAttr) {
-		fastScroller = context.layout(attrs)
-	}
-
-	override fun setAdapter(adapter: Adapter<*>?) = super.setAdapter(adapter).also {
-		when (adapter) {
-			is FastScroller.SectionIndexer -> fastScroller.setSectionIndexer(adapter)
-			null -> fastScroller.setSectionIndexer(null)
-		}
-	}
-
-	override fun setVisibility(visibility: Int) = super.setVisibility(visibility).also {
-		fastScroller.visibility = visibility
-	}
-
-	fun setFastScrollListener(fastScrollListener: FastScroller.FastScrollListener?) =
-		fastScroller.setFastScrollListener(fastScrollListener)
-
-	fun setFastScrollEnabled(enabled: Boolean) {
-		fastScroller.isEnabled = enabled
-	}
-
-	fun setHideScrollbar(hideScrollbar: Boolean) = fastScroller.setHideScrollbar(hideScrollbar)
-
-	fun setTrackVisible(visible: Boolean) = fastScroller.setTrackVisible(visible)
-
-	fun setTrackColor(@ColorInt color: Int) = fastScroller.setTrackColor(color)
-
-	fun setHandleColor(@ColorInt color: Int) = fastScroller.setHandleColor(color)
-
-	@JvmOverloads
-	fun setBubbleVisible(visible: Boolean, always: Boolean = false) = fastScroller.setBubbleVisible(visible, always)
-
-	fun setBubbleColor(@ColorInt color: Int) = fastScroller.setBubbleColor(color)
-
-	fun setBubbleTextColor(@ColorInt color: Int) = fastScroller.setBubbleTextColor(color)
-
-	fun setBubbleTextSize(size: Int) = fastScroller.setBubbleTextSize(size)
-
-	override fun onAttachedToWindow() = super.onAttachedToWindow().also {
-		fastScroller.attachRecyclerView(this)
-	}
-
-	override fun onDetachedFromWindow() {
-		fastScroller.detachRecyclerView()
-		super.onDetachedFromWindow()
-	}
-
-	private fun Context.layout(attrs: AttributeSet? = null) =
-		FastScroller(this, attrs).apply { id = R.id.fast_scroller }
-}

app/src/main/java/org/koitharu/kotatsu/details/ui/ChaptersFragment.kt

@@ -10,6 +10,7 @@ import androidx.appcompat.widget.SearchView
 import androidx.core.graphics.Insets
 import androidx.core.view.MenuProvider
 import androidx.core.view.isVisible
+import androidx.core.view.updateLayoutParams
 import androidx.core.view.updatePadding
 import com.google.android.material.snackbar.Snackbar
 import org.koin.androidx.viewmodel.ext.android.sharedViewModel
@@ -29,6 +30,7 @@ import org.koitharu.kotatsu.reader.ui.ReaderActivity
 import org.koitharu.kotatsu.reader.ui.ReaderState
 import org.koitharu.kotatsu.utils.RecyclerViewScrollCallback
 import org.koitharu.kotatsu.utils.ext.addMenuProvider
+import org.koitharu.kotatsu.utils.ext.end
 import kotlin.math.roundToInt
 
 class ChaptersFragment :
@@ -192,6 +194,9 @@ class ChaptersFragment :
 		binding.recyclerViewChapters.updatePadding(
 			bottom = insets.bottom + (binding.spinnerBranches?.height ?: 0),
 		)
+		binding.recyclerViewChapters.fastScroller.updateLayoutParams<ViewGroup.MarginLayoutParams> {
+			bottomMargin = insets.bottom
+		}
 	}
 
 	private fun initSpinner(spinner: Spinner) {

app/src/main/java/org/koitharu/kotatsu/details/ui/adapter/ChaptersAdapter.kt

@@ -1,15 +1,16 @@
 package org.koitharu.kotatsu.details.ui.adapter
 
+import android.content.Context
 import androidx.recyclerview.widget.DiffUtil
 import com.hannesdorfmann.adapterdelegates4.AsyncListDifferDelegationAdapter
 import org.koitharu.kotatsu.base.ui.list.OnListItemClickListener
-import org.koitharu.kotatsu.base.ui.widgets.FastScroller
+import org.koitharu.kotatsu.base.ui.list.fastscroll.FastScroller
 import org.koitharu.kotatsu.details.ui.model.ChapterListItem
 import kotlin.jvm.internal.Intrinsics
 
 class ChaptersAdapter(
 	onItemClickListener: OnListItemClickListener<ChapterListItem>,
-) :	AsyncListDifferDelegationAdapter<ChapterListItem>(DiffCallback()), FastScroller.SectionIndexer {
+) : AsyncListDifferDelegationAdapter<ChapterListItem>(DiffCallback()), FastScroller.SectionIndexer {
 
 	init {
 		setHasStableIds(true)
@@ -41,7 +42,7 @@ class ChaptersAdapter(
 		}
 	}
 
-	override fun getSectionText(position: Int): CharSequence {
+	override fun getSectionText(context: Context, position: Int): CharSequence {
 		return items[position].chapter.number.toString()
 	}
 }

app/src/main/java/org/koitharu/kotatsu/history/ui/HistoryListAdapter.kt

@@ -0,0 +1,27 @@
+package org.koitharu.kotatsu.history.ui
+
+import android.content.Context
+import androidx.lifecycle.LifecycleOwner
+import coil.ImageLoader
+import org.koitharu.kotatsu.base.ui.list.fastscroll.FastScroller
+import org.koitharu.kotatsu.core.ui.DateTimeAgo
+import org.koitharu.kotatsu.list.ui.adapter.MangaListAdapter
+import org.koitharu.kotatsu.list.ui.adapter.MangaListListener
+
+class HistoryListAdapter(
+	coil: ImageLoader,
+	lifecycleOwner: LifecycleOwner,
+	listener: MangaListListener
+) : MangaListAdapter(coil, lifecycleOwner, listener), FastScroller.SectionIndexer {
+
+	override fun getSectionText(context: Context, position: Int): CharSequence {
+		val list = items
+		for (i in (0..position).reversed()) {
+			val item = list[i]
+			if (item is DateTimeAgo) {
+				return item.format(context.resources)
+			}
+		}
+		return ""
+	}
+}

app/src/main/java/org/koitharu/kotatsu/history/ui/HistoryListFragment.kt

@@ -6,6 +6,7 @@ import android.view.MenuItem
 import android.view.View
 import androidx.appcompat.view.ActionMode
 import com.google.android.material.snackbar.Snackbar
+import org.koin.android.ext.android.get
 import org.koin.androidx.viewmodel.ext.android.viewModel
 import org.koitharu.kotatsu.R
 import org.koitharu.kotatsu.base.domain.ReversibleHandle
@@ -53,6 +54,8 @@ class HistoryListFragment : MangaListFragment() {
 		}
 	}
 
+	override fun onCreateAdapter() = HistoryListAdapter(get(), viewLifecycleOwner, this)
+
 	private fun onItemsRemoved(reversibleHandle: ReversibleHandle) {
 		Snackbar.make(binding.recyclerView, R.string.removed_from_history, Snackbar.LENGTH_LONG)
 			.setAction(R.string.undo) { reversibleHandle.reverseAsync() }

app/src/main/java/org/koitharu/kotatsu/list/ui/MangaListFragment.kt

@@ -2,11 +2,13 @@ package org.koitharu.kotatsu.list.ui
 
 import android.os.Bundle
 import android.view.*
+import android.view.ViewGroup.MarginLayoutParams
 import androidx.annotation.CallSuper
 import androidx.appcompat.view.ActionMode
 import androidx.collection.ArraySet
 import androidx.core.graphics.Insets
 import androidx.core.view.isNotEmpty
+import androidx.core.view.updateLayoutParams
 import androidx.core.view.updatePadding
 import androidx.recyclerview.widget.GridLayoutManager
 import androidx.swiperefreshlayout.widget.SwipeRefreshLayout
@@ -73,11 +75,7 @@ abstract class MangaListFragment :
 
 	override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
 		super.onViewCreated(view, savedInstanceState)
-		listAdapter = MangaListAdapter(
+		listAdapter = onCreateAdapter()
-			coil = get(),
-			lifecycleOwner = viewLifecycleOwner,
-			listener = this,
-		)
 		selectionController = ListSelectionController(
 			activity = requireActivity(),
 			decoration = MangaSelectionDecoration(view.context),
@@ -167,6 +165,14 @@ abstract class MangaListFragment :
 		}
 	}
 
+	protected open fun onCreateAdapter(): MangaListAdapter {
+		return MangaListAdapter(
+			coil = get(),
+			lifecycleOwner = viewLifecycleOwner,
+			listener = this,
+		)
+	}
+
 	override fun onWindowInsetsChanged(insets: Insets) {
 		binding.root.updatePadding(
 			left = insets.left,
@@ -175,6 +181,10 @@ abstract class MangaListFragment :
 		binding.recyclerView.updatePadding(
 			bottom = insets.bottom,
 		)
+		binding.recyclerView.fastScroller.updateLayoutParams<MarginLayoutParams> {
+			bottomMargin = insets.bottom
+			marginEnd = insets.end(binding.recyclerView)
+		}
 		if (activity is MainActivity) {
 			val headerHeight = (activity as? AppBarOwner)?.appBar?.measureHeight() ?: insets.top
 			binding.swipeRefreshLayout.setProgressViewOffset(

app/src/main/java/org/koitharu/kotatsu/list/ui/adapter/MangaListAdapter.kt

@@ -8,7 +8,7 @@ import org.koitharu.kotatsu.core.ui.DateTimeAgo
 import org.koitharu.kotatsu.list.ui.model.*
 import kotlin.jvm.internal.Intrinsics
 
-class MangaListAdapter(
+open class MangaListAdapter(
 	coil: ImageLoader,
 	lifecycleOwner: LifecycleOwner,
 	listener: MangaListListener,

app/src/main/java/org/koitharu/kotatsu/utils/ext/InsetsExt.kt

@@ -0,0 +1,12 @@
+package org.koitharu.kotatsu.utils.ext
+
+import android.view.View
+import androidx.core.graphics.Insets
+
+fun Insets.end(view: View): Int {
+	return if (view.layoutDirection == View.LAYOUT_DIRECTION_RTL) left else right
+}
+
+fun Insets.start(view: View): Int {
+	return if (view.layoutDirection == View.LAYOUT_DIRECTION_RTL) right else left
+}

app/src/main/java/org/koitharu/kotatsu/utils/ext/ViewExt.kt

@@ -4,6 +4,7 @@ import android.app.Activity
 import android.graphics.Rect
 import android.view.View
 import android.view.ViewGroup
+import android.view.ViewParent
 import android.view.inputmethod.InputMethodManager
 import androidx.core.view.ViewCompat
 import androidx.core.view.children
@@ -147,4 +148,13 @@ fun RecyclerView.invalidateNestedItemDecorations() {
 	}
 }
 
-internal val View.compatPaddingStart get() = ViewCompat.getPaddingStart(this)
+internal val View.compatPaddingStart get() = ViewCompat.getPaddingStart(this)
+
+val View.parents: Sequence<ViewParent>
+	get() = sequence {
+		var p: ViewParent? = parent
+		while (p != null) {
+			yield(p)
+			p = p.parent
+		}
+	}

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

@@ -1,11 +1,8 @@
 <?xml version="1.0" encoding="utf-8"?>
 <shape
 	xmlns:android="http://schemas.android.com/apk/res/android"
-	xmlns:tools="http://schemas.android.com/tools"
 	android:shape="rectangle">
 
-	<tools:solid android:color="#777777" />
-
 	<corners
 		android:topLeftRadius="@dimen/fastscroll_bubble_radius"
 		android:topRightRadius="@dimen/fastscroll_bubble_radius"

app/src/main/res/layout-w720dp/activity_details.xml

@@ -12,6 +12,7 @@
 		android:id="@+id/appbar"
 		android:layout_width="0dp"
 		android:layout_height="wrap_content"
+		android:fitsSystemWindows="true"
 		app:elevation="0dp"
 		app:layout_constraintEnd_toEndOf="parent"
 		app:layout_constraintStart_toStartOf="parent"

app/src/main/res/layout-w720dp/fragment_chapters.xml

@@ -6,13 +6,12 @@
 	android:layout_width="match_parent"
 	android:layout_height="match_parent">
 
-	<org.koitharu.kotatsu.base.ui.widgets.FastScrollRecyclerView
+	<org.koitharu.kotatsu.base.ui.list.fastscroll.FastScrollRecyclerView
 		android:id="@+id/recyclerView_chapters"
 		android:layout_width="match_parent"
 		android:layout_height="match_parent"
 		android:clipToPadding="false"
 		android:orientation="vertical"
-		app:handleColor="?attr/colorTertiary"
 		app:layoutManager="androidx.recyclerview.widget.LinearLayoutManager"
 		tools:listitem="@layout/item_chapter" />
 

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

@@ -1,5 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
+<?xml version="1.0" encoding="utf-8"?><!--
-<!--
   ~ Copyright 2022 Randy Webster. All rights reserved.
   ~
   ~ Licensed under the Apache License, Version 2.0 (the "License");
@@ -17,45 +16,54 @@
 
 <merge
 	xmlns:android="http://schemas.android.com/apk/res/android"
-	xmlns:tools="http://schemas.android.com/tools">
+	xmlns:tools="http://schemas.android.com/tools"
+	tools:clipChildren="false"
+	tools:layout_gravity="end"
+	tools:layout_height="match_parent"
+	tools:layout_width="wrap_content"
+	tools:orientation="horizontal"
+	tools:parentTag="android.widget.LinearLayout">
 
 	<TextView
-		android:id="@+id/fastscroll_bubble"
+		android:id="@+id/bubble"
 		android:layout_width="wrap_content"
 		android:layout_height="wrap_content"
 		android:layout_gravity="end"
 		android:gravity="center"
-		android:maxLines="1"
+		android:singleLine="true"
-		android:visibility="gone"
+		android:visibility="invisible"
 		tools:background="@drawable/fastscroll_bubble"
+		tools:backgroundTint="@color/blue_primary"
 		tools:text="A"
 		tools:textColor="#ffffff"
 		tools:visibility="visible" />
 
 	<FrameLayout
-		android:id="@+id/fastscroll_scrollbar"
+		android:id="@+id/scrollbar"
 		android:layout_width="wrap_content"
 		android:layout_height="match_parent"
-		android:paddingEnd="@dimen/fastscroll_scrollbar_padding_end"
 		android:paddingStart="@dimen/fastscroll_scrollbar_padding_start"
+		android:paddingEnd="@dimen/fastscroll_scrollbar_padding_end"
 		android:visibility="gone"
 		tools:visibility="visible">
 
 		<ImageView
-			android:id="@+id/fastscroll_track"
+			android:id="@+id/track"
 			android:layout_width="wrap_content"
 			android:layout_height="match_parent"
 			android:layout_gravity="center_horizontal"
 			tools:ignore="ContentDescription"
-			tools:src="@drawable/fastscroll_track" />
+			tools:src="@drawable/fastscroll_track"
+			tools:tint="@color/kotatsu_outline" />
 
 		<ImageView
-			android:id="@+id/fastscroll_handle"
+			android:id="@+id/thumb"
 			android:layout_width="wrap_content"
 			android:layout_height="wrap_content"
 			android:layout_gravity="center_horizontal"
 			tools:ignore="ContentDescription"
-			tools:src="@drawable/fastscroll_handle" />
+			tools:src="@drawable/fastscroll_handle"
+			tools:tint="@color/kotatsu_primary" />
 
 	</FrameLayout>
 

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

@@ -17,7 +17,7 @@
 		tools:listitem="@layout/item_branch"
 		tools:visibility="visible" />
 
-	<org.koitharu.kotatsu.base.ui.widgets.FastScrollRecyclerView
+	<org.koitharu.kotatsu.base.ui.list.fastscroll.FastScrollRecyclerView
 		android:id="@+id/recyclerView_chapters"
 		android:layout_width="0dp"
 		android:layout_height="0dp"
@@ -28,11 +28,7 @@
 		android:layout_alignParentBottom="true"
 		android:clipToPadding="false"
 		android:orientation="vertical"
-		app:bubbleColor="?attr/colorTertiary"
-		app:bubbleTextColor="?attr/colorOnTertiary"
-		app:handleColor="?attr/colorTertiary"
 		app:layoutManager="androidx.recyclerview.widget.LinearLayoutManager"
-		app:showBubble="true"
 		tools:listitem="@layout/item_chapter" />
 
 	<com.google.android.material.progressindicator.CircularProgressIndicator

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

@@ -11,7 +11,7 @@
 		android:layout_width="match_parent"
 		android:layout_height="match_parent">
 
-		<org.koitharu.kotatsu.base.ui.widgets.FastScrollRecyclerView
+		<org.koitharu.kotatsu.base.ui.list.fastscroll.FastScrollRecyclerView
 			android:id="@+id/recyclerView"
 			android:layout_width="match_parent"
 			android:layout_height="match_parent"
@@ -21,8 +21,8 @@
 			android:paddingTop="@dimen/grid_spacing_outer"
 			android:paddingRight="@dimen/list_spacing"
 			android:paddingBottom="@dimen/grid_spacing_outer"
-			app:trackColor="?attr/colorOutline"
 			app:layoutManager="androidx.recyclerview.widget.LinearLayoutManager"
+			app:trackColor="?attr/colorOutline"
 			tools:listitem="@layout/item_feed" />
 
 	</FrameLayout>

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

@@ -3,7 +3,6 @@
 	xmlns:android="http://schemas.android.com/apk/res/android"
 	xmlns:app="http://schemas.android.com/apk/res-auto"
 	xmlns:tools="http://schemas.android.com/tools"
-	android:id="@+id/swipeRefreshLayout"
 	android:layout_width="match_parent"
 	android:layout_height="match_parent"
 	android:clipToPadding="false"
@@ -12,13 +11,12 @@
 	android:paddingRight="@dimen/list_spacing"
 	android:paddingBottom="@dimen/grid_spacing_outer">
 
-	<org.koitharu.kotatsu.base.ui.widgets.FastScrollRecyclerView
+	<androidx.recyclerview.widget.RecyclerView
 		android:id="@+id/recyclerView"
 		android:layout_width="match_parent"
 		android:layout_height="match_parent"
 		android:orientation="vertical"
 		app:layoutManager="androidx.recyclerview.widget.LinearLayoutManager"
-		app:handleColor="?attr/colorTertiary"
 		tools:listitem="@layout/item_feed" />
 
 </FrameLayout>

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

@@ -11,17 +11,17 @@
 		android:layout_width="match_parent"
 		android:layout_height="match_parent">
 
-		<androidx.recyclerview.widget.RecyclerView
+		<org.koitharu.kotatsu.base.ui.list.fastscroll.FastScrollRecyclerView
 			android:id="@+id/recyclerView"
 			android:layout_width="match_parent"
 			android:layout_height="match_parent"
 			android:clipToPadding="false"
 			android:orientation="vertical"
 			android:paddingLeft="@dimen/list_spacing"
-			android:paddingRight="@dimen/list_spacing"
 			android:paddingTop="@dimen/grid_spacing_outer"
+			android:paddingRight="@dimen/list_spacing"
 			android:paddingBottom="@dimen/grid_spacing_outer"
-			app:handleColor="?attr/colorTertiary"
+			app:bubbleSize="small"
 			tools:layoutManager="org.koitharu.kotatsu.base.ui.list.FitHeightLinearLayoutManager"
 			tools:listitem="@layout/item_manga_list" />
 

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

@@ -12,13 +12,12 @@
 	android:paddingRight="@dimen/list_spacing"
 	android:paddingBottom="@dimen/grid_spacing_outer">
 
-	<org.koitharu.kotatsu.base.ui.widgets.FastScrollRecyclerView
+	<org.koitharu.kotatsu.base.ui.list.fastscroll.FastScrollRecyclerView
 		android:id="@+id/recyclerView"
 		android:layout_width="match_parent"
 		android:layout_height="match_parent"
 		android:orientation="vertical"
 		app:layoutManager="androidx.recyclerview.widget.LinearLayoutManager"
-		app:handleColor="?attr/colorTertiary"
 		tools:listitem="@layout/item_feed" />
 
 </FrameLayout>

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

@@ -22,13 +22,12 @@
 
 	</com.google.android.material.appbar.AppBarLayout>
 
-	<org.koitharu.kotatsu.base.ui.widgets.FastScrollRecyclerView
+	<org.koitharu.kotatsu.base.ui.list.fastscroll.FastScrollRecyclerView
 		android:id="@+id/recyclerView"
 		android:layout_width="match_parent"
 		android:layout_height="wrap_content"
 		android:clipToPadding="false"
 		android:orientation="vertical"
-		app:handleColor="?attr/colorOutline"
 		app:layoutManager="androidx.recyclerview.widget.LinearLayoutManager"
 		tools:listitem="@layout/item_chapter" />
 

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

@@ -5,6 +5,7 @@
 	<attr name="multiAutoCompleteTextViewPreferenceStyle" />
 	<attr name="autoCompleteTextViewPreferenceStyle" />
 	<attr name="listItemTextViewStyle" />
+	<attr name="fastScrollerStyle" />
 
 	<declare-styleable name="Theme">
 		<attr name="navigationBarDividerColor" format="color" />
@@ -53,16 +54,16 @@
 	</declare-styleable>
 
 	<declare-styleable name="FastScroller">
-		<attr format="boolean" name="hideScrollbar" />
+		<attr name="hideScrollbar" format="boolean" />
-		<attr format="boolean" name="showBubble" />
+		<attr name="showBubble" format="boolean" />
-		<attr format="boolean" name="showBubbleAlways" />
+		<attr name="showBubbleAlways" format="boolean" />
-		<attr format="boolean" name="showTrack" />
+		<attr name="showTrack" format="boolean" />
-		<attr format="color" name="bubbleColor" />
+		<attr name="bubbleColor" format="color" />
-		<attr format="color" name="bubbleTextColor" />
+		<attr name="bubbleTextColor" format="color" />
-		<attr format="color" name="handleColor" />
+		<attr name="thumbColor" format="color" />
-		<attr format="color" name="trackColor" />
+		<attr name="trackColor" format="color" />
-		<attr format="dimension" name="bubbleTextSize" />
+		<attr name="bubbleTextSize" format="dimension" />
-		<attr format="enum" name="bubbleSize">
+		<attr name="bubbleSize" format="enum">
 			<enum name="normal" value="0" />
 			<enum name="small" value="1" />
 		</attr>

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

@@ -44,8 +44,8 @@
 	<dimen name="fastscroll_bubble_padding">16dp</dimen>
 
 	<dimen name="fastscroll_bubble_radius_small">32dp</dimen>
-	<dimen name="fastscroll_bubble_size_small">64dp</dimen>
+	<dimen name="fastscroll_bubble_size_small">36dp</dimen>
-	<dimen name="fastscroll_bubble_text_size_small">36sp</dimen>
+	<dimen name="fastscroll_bubble_text_size_small">24sp</dimen>
 	<dimen name="fastscroll_bubble_padding_small">12dp</dimen>
 
 	<dimen name="fastscroll_handle_height">58dp</dimen>

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

@@ -115,6 +115,14 @@
 		<item name="android:scrollbarStyle">outsideOverlay</item>
 	</style>
 
+	<style name="Widget.Kotatsu.FastScroller" parent="">
+		<item name="thumbColor">?colorTertiary</item>
+		<item name="bubbleColor">?colorTertiary</item>
+		<item name="bubbleTextColor">?colorOnTertiary</item>
+		<item name="trackColor">?colorOutline</item>
+		<item name="bubbleSize">normal</item>
+	</style>
+
 	<style name="Widget.Kotatsu.ListItemTextView" parent="">
 		<item name="android:textColor">@color/list_item_text_color</item>
 		<item name="backgroundFillColor">@color/list_item_background_color</item>

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

@@ -71,6 +71,7 @@
 		<item name="tabStyle">@style/Widget.Kotatsu.Tabs</item>
 		<item name="materialCardViewStyle">@style/Widget.Material3.CardView.Filled</item>
 		<item name="recyclerViewStyle">@style/Widget.Kotatsu.RecyclerView</item>
+		<item name="fastScrollerStyle">@style/Widget.Kotatsu.FastScroller</item>
 		<item name="listItemTextViewStyle">@style/Widget.Kotatsu.ListItemTextView</item>
 		<item name="materialSwitchStyle">@style/Widget.Material3.CompoundButton.MaterialSwitch</item>
 		<item name="switchPreferenceCompatStyle">@style/Preference.SwitchPreferenceCompat.M3</item>