Add fast scroller to library

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

@@ -18,6 +18,7 @@ import eu.kanade.tachiyomi.util.lang.plusAssign
 import eu.kanade.tachiyomi.util.system.toast
 import eu.kanade.tachiyomi.util.view.inflate
 import eu.kanade.tachiyomi.widget.AutofitRecyclerView
+import kotlinx.android.synthetic.main.library_category.view.fast_scroller
 import kotlinx.android.synthetic.main.library_category.view.swipe_refresh
 import rx.subscriptions.CompositeSubscription
 import uy.kohesive.injekt.injectLazy
@@ -81,6 +82,7 @@ class LibraryCategoryView @JvmOverloads constructor(context: Context, attrs: Att
         recycler.setHasFixedSize(true)
         recycler.adapter = adapter
         swipe_refresh.addView(recycler)
+        adapter.fastScroller = fast_scroller
 
         recycler.addOnScrollListener(object : RecyclerView.OnScrollListener() {
             override fun onScrollStateChanged(recycler: RecyclerView, newState: Int) {

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

@@ -1,5 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <eu.kanade.tachiyomi.ui.library.LibraryCategoryView 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:layout_width="match_parent"
     android:layout_height="match_parent">
 
@@ -8,4 +10,13 @@
         android:layout_width="match_parent"
         android:layout_height="match_parent" />
 
+    <eu.davidea.fastscroller.FastScroller
+        android:id="@+id/fast_scroller"
+        android:layout_width="wrap_content"
+        android:layout_height="match_parent"
+        android:layout_centerHorizontal="true"
+        android:layout_gravity="end"
+        app:fastScrollerBubbleEnabled="false"
+        tools:visibility="visible" />
+
 </eu.kanade.tachiyomi.ui.library.LibraryCategoryView>