diff --git a/app/src/main/kotlin/org/koitharu/kotatsu/core/ui/list/fastscroll/FastScroller.kt b/app/src/main/kotlin/org/koitharu/kotatsu/core/ui/list/fastscroll/FastScroller.kt
index 973664042..454b5c453 100644
--- a/app/src/main/kotlin/org/koitharu/kotatsu/core/ui/list/fastscroll/FastScroller.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/core/ui/list/fastscroll/FastScroller.kt
@@ -19,13 +19,13 @@ import androidx.coordinatorlayout.widget.CoordinatorLayout
 import androidx.core.content.ContextCompat
 import androidx.core.content.withStyledAttributes
 import androidx.core.view.GravityCompat
+import androidx.core.view.ancestors
 import androidx.core.view.isGone
 import androidx.core.view.isVisible
 import androidx.recyclerview.widget.RecyclerView
 import org.koitharu.kotatsu.R
 import org.koitharu.kotatsu.core.util.ext.getThemeColor
 import org.koitharu.kotatsu.core.util.ext.isLayoutReversed
-import org.koitharu.kotatsu.core.util.ext.parents
 import org.koitharu.kotatsu.databinding.FastScrollerBinding
 import kotlin.math.roundToInt
 import com.google.android.material.R as materialR
@@ -522,7 +522,7 @@ class FastScroller @JvmOverloads constructor(
 		return BubbleSize.entries.getOrNull(ordinal) ?: defaultValue
 	}
 
-	private fun findValidParent(view: View): ViewGroup? = view.parents.firstNotNullOfOrNull { p ->
+	private fun findValidParent(view: View): ViewGroup? = view.ancestors.firstNotNullOfOrNull { p ->
 		if (p is FrameLayout || p is ConstraintLayout || p is CoordinatorLayout || p is RelativeLayout) {
 			p as ViewGroup
 		} else {
diff --git a/app/src/main/kotlin/org/koitharu/kotatsu/core/ui/sheet/AdaptiveSheetHeaderBar.kt b/app/src/main/kotlin/org/koitharu/kotatsu/core/ui/sheet/AdaptiveSheetHeaderBar.kt
index 0e062a844..055454628 100644
--- a/app/src/main/kotlin/org/koitharu/kotatsu/core/ui/sheet/AdaptiveSheetHeaderBar.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/core/ui/sheet/AdaptiveSheetHeaderBar.kt
@@ -9,10 +9,10 @@ import androidx.annotation.AttrRes
 import androidx.annotation.StringRes
 import androidx.coordinatorlayout.widget.CoordinatorLayout
 import androidx.core.content.withStyledAttributes
+import androidx.core.view.ancestors
 import androidx.core.view.isGone
 import androidx.core.view.isVisible
 import org.koitharu.kotatsu.R
-import org.koitharu.kotatsu.core.util.ext.parents
 import org.koitharu.kotatsu.databinding.LayoutSheetHeaderAdaptiveBinding
 
 class AdaptiveSheetHeaderBar @JvmOverloads constructor(
@@ -81,14 +81,9 @@ class AdaptiveSheetHeaderBar @JvmOverloads constructor(
 	}
 
 	private fun findParentSheetBehavior(): AdaptiveSheetBehavior? {
-		for (p in parents) {
-			val layoutParams = (p as? View)?.layoutParams
-			if (layoutParams is CoordinatorLayout.LayoutParams) {
-				AdaptiveSheetBehavior.from(layoutParams)?.let {
-					return it
-				}
-			}
+		return ancestors.firstNotNullOfOrNull {
+			((it as? View)?.layoutParams as? CoordinatorLayout.LayoutParams)
+				?.let { params -> AdaptiveSheetBehavior.from(params) }
 		}
-		return null
 	}
 }
diff --git a/app/src/main/kotlin/org/koitharu/kotatsu/core/util/ext/View.kt b/app/src/main/kotlin/org/koitharu/kotatsu/core/util/ext/View.kt
index 5f3bc159e..41048c7e1 100644
--- a/app/src/main/kotlin/org/koitharu/kotatsu/core/util/ext/View.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/core/util/ext/View.kt
@@ -5,10 +5,10 @@ import android.graphics.Rect
 import android.view.View
 import android.view.View.MeasureSpec
 import android.view.ViewGroup
-import android.view.ViewParent
 import android.view.inputmethod.InputMethodManager
 import android.widget.Checkable
 import androidx.core.view.children
+import androidx.core.view.descendants
 import androidx.core.view.isVisible
 import androidx.recyclerview.widget.RecyclerView
 import androidx.viewpager2.widget.ViewPager2
@@ -89,23 +89,8 @@ fun Slider.setValueRounded(newValue: Float) {
 	value = roundedValue.coerceIn(valueFrom, valueTo)
 }
 
-fun <T : View> ViewGroup.findViewsByType(clazz: Class<T>): Sequence<T> {
-	if (childCount == 0) {
-		return emptySequence()
-	}
-	return sequence {
-		for (view in children) {
-			if (clazz.isInstance(view)) {
-				yield(clazz.cast(view)!!)
-			} else if (view is ViewGroup && view.childCount != 0) {
-				yieldAll(view.findViewsByType(clazz))
-			}
-		}
-	}
-}
-
 fun RecyclerView.invalidateNestedItemDecorations() {
-	findViewsByType(RecyclerView::class.java).forEach {
+	descendants.filterIsInstance<RecyclerView>().forEach {
 		it.invalidateItemDecorations()
 	}
 }
@@ -113,15 +98,6 @@ fun RecyclerView.invalidateNestedItemDecorations() {
 val View.parentView: ViewGroup?
 	get() = parent as? ViewGroup
 
-val View.parents: Sequence<ViewParent>
-	get() = sequence {
-		var p: ViewParent? = parent
-		while (p != null) {
-			yield(p)
-			p = p.parent
-		}
-	}
-
 fun View.measureDimension(desiredSize: Int, measureSpec: Int): Int {
 	var result: Int
 	val specMode = MeasureSpec.getMode(measureSpec)
diff --git a/app/src/main/kotlin/org/koitharu/kotatsu/reader/ui/pager/webtoon/WebtoonImageView.kt b/app/src/main/kotlin/org/koitharu/kotatsu/reader/ui/pager/webtoon/WebtoonImageView.kt
index 22c87c944..d663fa2da 100644
--- a/app/src/main/kotlin/org/koitharu/kotatsu/reader/ui/pager/webtoon/WebtoonImageView.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/reader/ui/pager/webtoon/WebtoonImageView.kt
@@ -3,9 +3,9 @@ package org.koitharu.kotatsu.reader.ui.pager.webtoon
 import android.content.Context
 import android.graphics.PointF
 import android.util.AttributeSet
+import androidx.core.view.ancestors
 import androidx.recyclerview.widget.RecyclerView
 import com.davemorrissey.labs.subscaleview.SubsamplingScaleImageView
-import org.koitharu.kotatsu.core.util.ext.parents
 import org.koitharu.kotatsu.parsers.util.toIntUp
 
 private const val SCROLL_UNKNOWN = -1
@@ -93,7 +93,7 @@ class WebtoonImageView @JvmOverloads constructor(
 		if (oldh == h || oldw == 0 || oldh == 0 || scrollRange == SCROLL_UNKNOWN) return
 
 		computeScrollRange()
-		val container = parents.firstNotNullOfOrNull { it as? WebtoonFrameLayout } ?: return
+		val container = ancestors.firstNotNullOfOrNull { it as? WebtoonFrameLayout } ?: return
 		val parentHeight = parentHeight()
 		if (scrollPos != 0 && container.bottom < parentHeight) {
 			scrollTo(scrollRange)
@@ -115,6 +115,6 @@ class WebtoonImageView @JvmOverloads constructor(
 	}
 
 	private fun parentHeight(): Int {
-		return parents.firstNotNullOfOrNull { it as? RecyclerView }?.height ?: 0
+		return ancestors.firstNotNullOfOrNull { it as? RecyclerView }?.height ?: 0
 	}
 }