MaterialFastScroll updates

(cherry picked from commit d86d861e4b)

app/src/main/java/eu/kanade/tachiyomi/ui/library/MaterialFastScroll.kt

@@ -5,7 +5,7 @@ import android.util.AttributeSet
 import android.view.MotionEvent
 import eu.davidea.fastscroller.FastScroller
 import eu.kanade.tachiyomi.R
-import eu.kanade.tachiyomi.util.system.dpToPx
+import eu.kanade.tachiyomi.util.system.dpToPxEnd
 
 class MaterialFastScroll @JvmOverloads constructor(context: Context, attrs: AttributeSet? = null) :
     FastScroller(context, attrs) {
@@ -14,6 +14,8 @@ class MaterialFastScroll @JvmOverloads constructor(context: Context, attrs: Attr
         setViewsToUse(
             R.layout.material_fastscroll, R.id.fast_scroller_bubble, R.id.fast_scroller_handle
         )
+        autoHideEnabled = true
+        ignoreTouchesOutsideHandle = true
     }
 
     override fun onTouchEvent(event: MotionEvent): Boolean {
@@ -23,7 +25,9 @@ class MaterialFastScroll @JvmOverloads constructor(context: Context, attrs: Attr
 
     override fun setBubbleAndHandlePosition(y: Float) {
         super.setBubbleAndHandlePosition(y)
-        bubble.y = handle.y - bubble.height / 2f + handle.height / 2f
-        bubble.translationX = (-45).dpToPx.toFloat()
+        if (bubbleEnabled) {
+            bubble.y = handle.y - bubble.height / 2f + handle.height / 2f
+            bubble.translationX = (-45f).dpToPxEnd
+        }
     }
 }

app/src/main/java/eu/kanade/tachiyomi/util/system/ContextExtensions.kt

@@ -13,6 +13,7 @@ import android.graphics.Color
 import android.net.ConnectivityManager
 import android.net.Uri
 import android.os.PowerManager
+import android.view.View
 import android.widget.Toast
 import androidx.annotation.AttrRes
 import androidx.annotation.ColorInt
@@ -136,6 +137,18 @@ val Int.pxToDp: Int
 val Int.dpToPx: Int
     get() = (this * Resources.getSystem().displayMetrics.density).toInt()
 
+/**
+ * Converts to px and takes into account LTR/RTL layout.
+ */
+val Float.dpToPxEnd: Float
+    get() = (
+        this * Resources.getSystem().displayMetrics.density *
+            if (Resources.getSystem().isLTR) 1 else -1
+        )
+
+val Resources.isLTR
+    get() = configuration.layoutDirection == View.LAYOUT_DIRECTION_LTR
+
 /**
  * Property to get the notification manager from the context.
  */