Adopt MaterialFastScroll from J2K fork

de8cb8c1b0

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

@@ -0,0 +1,29 @@
+package eu.kanade.tachiyomi.ui.library
+
+import android.content.Context
+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
+
+class MaterialFastScroll @JvmOverloads constructor(context: Context, attrs: AttributeSet? = null) :
+    FastScroller(context, attrs) {
+
+    init {
+        setViewsToUse(
+            R.layout.material_fastscroll, R.id.fast_scroller_bubble, R.id.fast_scroller_handle
+        )
+    }
+
+    override fun onTouchEvent(event: MotionEvent): Boolean {
+        if (isHidden) return false
+        return super.onTouchEvent(event)
+    }
+
+    override fun setBubbleAndHandlePosition(y: Float) {
+        super.setBubbleAndHandlePosition(y)
+        bubble.y = handle.y - bubble.height / 2f + handle.height / 2f
+        bubble.translationX = (-45).dpToPx.toFloat()
+    }
+}