Rewrite catalogue adapter

app/src/main/java/eu/kanade/tachiyomi/widget/EndlessScrollListener.kt

@@ -1,46 +0,0 @@
-package eu.kanade.tachiyomi.widget
-
-import android.support.v7.widget.LinearLayoutManager
-import android.support.v7.widget.RecyclerView
-
-class EndlessScrollListener(
-        private val layoutManager: LinearLayoutManager,
-        private val requestNext: () -> Unit)
-: RecyclerView.OnScrollListener() {
-
-    companion object {
-        // The minimum amount of items to have below your current scroll position before loading
-        // more.
-        private val VISIBLE_THRESHOLD = 5
-    }
-
-    private var previousTotal = 0 // The total number of items in the dataset after the last load
-    private var loading = true // True if we are still waiting for the last set of data to load.
-    private var firstVisibleItem = 0
-    private var visibleItemCount = 0
-    private var totalItemCount = 0
-
-    fun resetScroll() {
-        previousTotal = 0
-        loading = true
-    }
-
-    override fun onScrolled(recyclerView: RecyclerView, dx: Int, dy: Int) {
-        super.onScrolled(recyclerView, dx, dy)
-
-        visibleItemCount = recyclerView.childCount
-        totalItemCount = layoutManager.itemCount
-        firstVisibleItem = layoutManager.findFirstVisibleItemPosition()
-
-        if (loading && totalItemCount > previousTotal) {
-            loading = false
-            previousTotal = totalItemCount
-        }
-        if (!loading && totalItemCount - visibleItemCount <= firstVisibleItem + VISIBLE_THRESHOLD) {
-            // End has been reached
-            requestNext()
-            loading = true
-        }
-    }
-
-}