Current category logic update + hopper up button update

Current category header now works by the first visual item in the view, not the first completely visible item anymore. Saving current item pref still relies on first completely visible

Hopper up button now goes to the top of the current category before going to the next category

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

@@ -119,6 +119,7 @@ class LibraryController(
      * Position of the active category.
      */
     private var activeCategory: Int = preferences.lastUsedCategory().getOrDefault()
+    private var lastUsedCategory: Int = preferences.lastUsedCategory().getOrDefault()
 
     private var justStarted = true
 
@@ -215,6 +216,11 @@ class LibraryController(
                     showCategoryText(currentCategory.name)
                 }
             }
+            val savedCurrentCategory = getHeader(true)?.category ?: return
+            if (savedCurrentCategory.order != lastUsedCategory) {
+                lastUsedCategory = savedCurrentCategory.order
+                preferences.lastUsedCategory().set(savedCurrentCategory.order)
+            }
         }
 
         override fun onScrollStateChanged(recyclerView: RecyclerView, newState: Int) {
@@ -240,7 +246,6 @@ class LibraryController(
     }
 
     fun saveActiveCategory(category: Category) {
-        preferences.lastUsedCategory().set(category.order)
         activeCategory = category.order
         val headerItem = getHeader() ?: return
         header_title.text = headerItem.category.name
@@ -515,12 +520,16 @@ class LibraryController(
     private fun jumpToNextCategory(next: Boolean) {
         val category = getVisibleHeader() ?: return
         if (presenter.showAllCategories) {
+            if (!next) {
+                val fPosition =
+                    (recycler.layoutManager as LinearLayoutManager).findFirstVisibleItemPosition()
+                if (fPosition != adapter.currentItems.indexOf(category)) {
+                    scrollToHeader(category.category.order)
+                    return
+                }
+            }
             val newOffset = adapter.headerItems.indexOf(category) + (if (next) 1 else -1)
-            if (if (!next) {
+            if (if (!next) newOffset > -1 else newOffset < adapter.headerItems.size) {
-                    newOffset > -1
-                } else {
-                    newOffset < adapter.headerItems.size
-                }) {
                 val newCategory = (adapter.headerItems[newOffset] as LibraryHeaderItem).category
                 val newOrder = newCategory.order
                 scrollToHeader(newOrder)
@@ -546,9 +555,12 @@ class LibraryController(
         }
     }
 
-    private fun getHeader(): LibraryHeaderItem? {
+    private fun getHeader(firstCompletelyVisible: Boolean = false): LibraryHeaderItem? {
-        val position =
+        val position = if (firstCompletelyVisible) {
             (recycler.layoutManager as LinearLayoutManager).findFirstCompletelyVisibleItemPosition()
+        } else {
+            -1
+        }
         if (position > 0) {
             when (val item = adapter.getItem(position)) {
                 is LibraryHeaderItem -> return item
@@ -566,12 +578,6 @@ class LibraryController(
     }
 
     private fun getVisibleHeader(): LibraryHeaderItem? {
-        val position =
-            (recycler.layoutManager as LinearLayoutManager).findFirstCompletelyVisibleItemPosition()
-        when (val item = adapter.getItem(position)) {
-            is LibraryHeaderItem -> return item
-            is LibraryItem -> return item.header
-        }
         val fPosition =
             (recycler.layoutManager as LinearLayoutManager).findFirstVisibleItemPosition()
         when (val item = adapter.getItem(fPosition)) {