UpdatesController: Don't init adapter until chapter data is ready (#6824)

Considering there's no pagination for this list, the data loading can take some
time. So this will show the existing refresh indicator instead of empty view
while the list is loading.

app/src/main/java/eu/kanade/tachiyomi/ui/manga/chapter/base/BaseChaptersAdapter.kt

@@ -4,8 +4,9 @@ import eu.davidea.flexibleadapter.FlexibleAdapter
 import eu.davidea.flexibleadapter.items.IFlexible
 
 abstract class BaseChaptersAdapter<T : IFlexible<*>>(
-    controller: OnChapterClickListener
-) : FlexibleAdapter<T>(null, controller, true) {
+    controller: OnChapterClickListener,
+    items: List<T>? = null,
+) : FlexibleAdapter<T>(items, controller, true) {
 
     /**
      * Listener for browse item clicks.

app/src/main/java/eu/kanade/tachiyomi/ui/recent/updates/UpdatesAdapter.kt

@@ -8,8 +8,9 @@ import eu.kanade.tachiyomi.util.system.getResourceColor
 
 class UpdatesAdapter(
     val controller: UpdatesController,
-    context: Context
-) : BaseChaptersAdapter<IFlexible<*>>(controller) {
+    context: Context,
+    val items: List<IFlexible<*>>?
+) : BaseChaptersAdapter<IFlexible<*>>(controller, items) {
 
     var readColor = context.getResourceColor(R.attr.colorOnSurface, 0.38f)
     var unreadColor = context.getResourceColor(R.attr.colorOnSurface)

app/src/main/java/eu/kanade/tachiyomi/ui/recent/updates/UpdatesController.kt

@@ -6,6 +6,7 @@ import android.view.MenuInflater
 import android.view.MenuItem
 import android.view.View
 import androidx.appcompat.view.ActionMode
+import androidx.core.view.isVisible
 import androidx.recyclerview.widget.LinearLayoutManager
 import dev.chrisbanes.insetter.applyInsetter
 import eu.davidea.flexibleadapter.FlexibleAdapter
@@ -88,10 +89,6 @@ class UpdatesController :
         val layoutManager = LinearLayoutManager(view.context)
         binding.recycler.layoutManager = layoutManager
         binding.recycler.setHasFixedSize(true)
-        adapter = UpdatesAdapter(this@UpdatesController, view.context)
-        binding.recycler.adapter = adapter
-        adapter?.fastScroller = binding.fastScroller
-
         binding.recycler.scrollStateChanges()
             .onEach {
                 // Disable swipe refresh when view is not at the top
@@ -100,6 +97,7 @@ class UpdatesController :
             }
             .launchIn(viewScope)
 
+        binding.swipeRefresh.isRefreshing = true
         binding.swipeRefresh.setDistanceToTriggerSync((2 * 64 * view.resources.displayMetrics.density).toInt())
         binding.swipeRefresh.refreshes()
             .onEach {
@@ -212,7 +210,15 @@ class UpdatesController :
      */
     fun onNextRecentChapters(chapters: List<IFlexible<*>>) {
         destroyActionModeIfNeeded()
-        adapter?.updateDataSet(chapters)
+        if (adapter == null) {
+            adapter = UpdatesAdapter(this@UpdatesController, binding.recycler.context, chapters)
+            binding.recycler.adapter = adapter
+            adapter!!.fastScroller = binding.fastScroller
+        } else {
+            adapter?.updateDataSet(chapters)
+        }
+        binding.swipeRefresh.isRefreshing = false
+        binding.fastScroller.isVisible = true
         binding.recycler.onAnimationsFinished {
             (activity as? MainActivity)?.ready = true
         }

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

@@ -24,6 +24,7 @@
             android:layout_width="wrap_content"
             android:layout_height="match_parent"
             android:layout_gravity="end"
+            android:visibility="gone"
             app:fastScrollerBubbleEnabled="false"
             tools:visibility="visible" />