From cb2223d47aafaa8fa4458041e3dcc5bf9d1ef9a2 Mon Sep 17 00:00:00 2001
From: Jay <jays2kings@gmail.com>
Date: Tue, 19 May 2020 01:34:14 -0400
Subject: [PATCH] Don't scroll to the top of the list on group change until
 view refresh

---
 .../eu/kanade/tachiyomi/ui/library/LibraryController.kt  | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/app/src/main/java/eu/kanade/tachiyomi/ui/library/LibraryController.kt b/app/src/main/java/eu/kanade/tachiyomi/ui/library/LibraryController.kt
index 3752c803ce..061f40a2e3 100644
--- a/app/src/main/java/eu/kanade/tachiyomi/ui/library/LibraryController.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/ui/library/LibraryController.kt
@@ -176,6 +176,7 @@ class LibraryController(
     private var filterTooltip: ViewTooltip? = null
     private var isAnimatingHopper: Boolean? = null
     var hasMovedHopper = preferences.shownHopperSwipeTutorial().get()
+    private var shouldScrollToTop = false
     private lateinit var elevateAppBar: ((Boolean) -> Unit)
 
     override fun getTitle(): String? {
@@ -454,7 +455,7 @@ class LibraryController(
                     ) { _, item ->
                         preferences.groupLibraryBy().set(item)
                         presenter.groupType = item
-                        recycler?.scrollToPosition(0)
+                        shouldScrollToTop = true
                         presenter.getLibrary()
                         true
                     }.show()
@@ -697,6 +698,10 @@ class LibraryController(
         category_recycler.setCategories(presenter.categories)
         filter_bottom_sheet.setExpandText(preferences.collapsedCategories().getOrDefault().isNotEmpty())
         setActiveCategory()
+        if (shouldScrollToTop) {
+            recycler.scrollToPosition(0)
+            shouldScrollToTop = false
+        }
         if (onRoot) {
             activity?.toolbar?.setOnClickListener {
                 val recycler = recycler ?: return@setOnClickListener
@@ -780,7 +785,7 @@ class LibraryController(
             presenter.switchSection(pos)
             activeCategory = pos
             setActiveCategory()
-            recycler.scrollToPosition(0)
+            shouldScrollToTop = true
             return
         }
         val headerPosition = adapter.indexOf(pos)