Option to always show the current category in the title

app/src/main/java/eu/kanade/tachiyomi/data/preference/PreferencesHelper.kt

@@ -273,6 +273,8 @@ class PreferencesHelper(val context: Context) {
 
     fun groupLibraryBy() = flowPrefs.getInt("group_library_by", 0)
 
+    fun showCategoryInTitle() = flowPrefs.getBoolean("category_in_title", false)
+
     // Tutorial preferences
     fun shownFilterTutorial() = flowPrefs.getBoolean("shown_filter_tutorial", false)
 

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

@@ -85,6 +85,11 @@ class DisplayBottomSheet(private val controller: LibraryController) : BottomShee
         }
         show_all.bindToPreference(preferences.showAllCategories()) {
             controller.presenter.getLibrary()
+            category_show.isEnabled = it
+        }
+        category_show.isEnabled = show_all.isChecked
+        category_show.bindToPreference(preferences.showCategoryInTitle()) {
+            controller.showMiniBar()
         }
         hide_hopper.bindToPreference(preferences.hideHopper()) {
             controller.hideHopper(it)

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

@@ -177,17 +177,22 @@ class LibraryController(
     private var isAnimatingHopper: Boolean? = null
     var hasMovedHopper = preferences.shownHopperSwipeTutorial().get()
     private var shouldScrollToTop = false
+    private val showCategoryInTitle
+        get() = preferences.showCategoryInTitle().get() && presenter.showAllCategories
     private lateinit var elevateAppBar: ((Boolean) -> Unit)
 
     override fun getTitle(): String? {
-        return view?.context?.getString(R.string.library)
+        return if (!showCategoryInTitle || header_title.text.isNullOrBlank() || recycler_cover?.isClickable == true) {
+            view?.context?.getString(R.string.library)
+        } else {
+            header_title.text.toString()
+        }
     }
 
     private var scrollListener = object : RecyclerView.OnScrollListener() {
         override fun onScrolled(recyclerView: RecyclerView, dx: Int, dy: Int) {
             super.onScrolled(recyclerView, dx, dy)
             val recyclerCover = recycler_cover ?: return
-            val order = getCategoryOrder()
             if (!recyclerCover.isClickable && isAnimatingHopper != true) {
                 category_hopper_frame.translationY += dy
                 category_hopper_frame.translationY =
@@ -202,13 +207,11 @@ class LibraryController(
                     scrollDistance = 0f
                 }
             } else scrollDistance = 0f
-            if (order != null && order != activeCategory && lastItem == null) {
+            val currentCategory = getHeader()?.category ?: return
-                preferences.lastUsedCategory().set(order)
+            if (currentCategory.order != activeCategory) {
-                activeCategory = order
+                saveActiveCategory(currentCategory)
-                setActiveCategory()
+                if (!showCategoryInTitle && presenter.categories.size > 1 && dy != 0 && recyclerView.translationY == 0f) {
-                if (presenter.categories.size > 1 && dy != 0 && recyclerView.translationY == 0f) {
+                    showCategoryText(currentCategory.name)
-                    val headerItem = getHeader() ?: return
-                    showCategoryText(headerItem.category.name)
                 }
             }
         }
@@ -235,6 +238,30 @@ class LibraryController(
         }
     }
 
+    fun saveActiveCategory(category: Category) {
+        preferences.lastUsedCategory().set(category.order)
+        activeCategory = category.order
+        val headerItem = getHeader() ?: return
+        header_title.text = headerItem.category.name
+        setActiveCategory()
+    }
+
+    private fun setActiveCategory() {
+        val currentCategory = presenter.categories.indexOfFirst {
+            if (presenter.showAllCategories) it.order == activeCategory else presenter.currentCategory == it.id
+        }
+        if (currentCategory > -1) {
+            category_recycler.setCategories(currentCategory)
+            header_title.text = presenter.categories[currentCategory].name
+            setTitle()
+        }
+    }
+
+    fun showMiniBar() {
+        header_title.visibleIf(showCategoryInTitle)
+        setTitle()
+    }
+
     fun showCategoryText(name: String) {
         textAnim?.cancel()
         textAnim = jumper_category_text.animate().alpha(0f).setDuration(250L).setStartDelay(2000)
@@ -316,7 +343,7 @@ class LibraryController(
         category_recycler.onCategoryClicked = {
             recycler.itemAnimator = null
             scrollToHeader(it)
-            showCategories(show = false, scroll = false)
+            showCategories(show = false)
         }
         category_recycler.onShowAllClicked = { isChecked ->
             preferences.showAllCategories().set(isChecked)
@@ -378,6 +405,8 @@ class LibraryController(
                     topMargin = recycler?.paddingTop ?: 0
                 }
                 header_title?.updatePaddingRelative(top = insets.systemWindowInsetTop + 2.dpToPx)
+            }, onLeavingController = {
+                header_title?.gone()
             })
 
         swipe_refresh.setOnRefreshListener {
@@ -690,6 +719,11 @@ class LibraryController(
         if (justStarted && freshStart) {
             scrollToHeader(activeCategory)
         }
+        recycler.post {
+            elevateAppBar(recycler.canScrollVertically(-1))
+            setActiveCategory()
+        }
+
         category_hopper_frame.visibleIf(!singleCategory && !preferences.hideHopper().get())
         filter_bottom_sheet.updateButtons(
             showExpand = !singleCategory && presenter.showAllCategories, groupType = presenter.groupType
@@ -697,13 +731,13 @@ class LibraryController(
         adapter.isLongPressDragEnabled = canDrag()
         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 {
+            listOf(activity?.toolbar, header_title).forEach {
+                it?.setOnClickListener {
                     val recycler = recycler ?: return@setOnClickListener
                     if (singleCategory) {
                         recycler.scrollToPosition(0)
@@ -715,6 +749,9 @@ class LibraryController(
                     showSlideAnimation()
                 }
             }
+            showMiniBar()
+        }
+    }
 
     private fun showDropdown() {
         if (onRoot) {
@@ -750,7 +787,7 @@ class LibraryController(
             .setDuration(duration)
     }
 
-    private fun showCategories(show: Boolean, scroll: Boolean = true) {
+    private fun showCategories(show: Boolean) {
         recycler_cover.isClickable = show
         recycler_cover.isFocusable = show
         val full = category_layout.height.toFloat() + recycler.paddingTop
@@ -761,6 +798,7 @@ class LibraryController(
         recycler_cover.animate().alpha(if (show) 0.75f else 0f).start()
         recycler.suppressLayout(show)
         activity?.toolbar?.showDropdown(!show)
+        setTitle()
         if (show) {
             category_recycler.scrollToCategory(activeCategory)
             fast_scroller?.hideScrollbar()
@@ -773,13 +811,6 @@ class LibraryController(
         }
     }
 
-    fun setActiveCategory() {
-        val currentCategory = presenter.categories.indexOfFirst {
-            if (presenter.showAllCategories) it.order == activeCategory else presenter.currentCategory == it.id
-        }
-        category_recycler.setCategories(currentCategory)
-    }
-
     private fun scrollToHeader(pos: Int) {
         if (!presenter.showAllCategories) {
             presenter.switchSection(pos)
@@ -803,6 +834,11 @@ class LibraryController(
                     else -> (-30).dpToPx
                 }) + appbarOffset
             )
+            (adapter.getItem(headerPosition) as? LibraryHeaderItem)?.category?.let {
+                saveActiveCategory(it)
+            }
+            activeCategory = pos
+            preferences.lastUsedCategory().set(pos)
             recycler.suppressLayout(false)
         }
     }
@@ -984,7 +1020,6 @@ class LibraryController(
         val position = viewHolder?.adapterPosition ?: return
         swipe_refresh.isEnabled = actionState != ItemTouchHelper.ACTION_STATE_DRAG
         if (actionState == ItemTouchHelper.ACTION_STATE_DRAG) {
-            activity?.appbar?.y = 0f
             if (lastItemPosition != null && position != lastItemPosition && lastItem == adapter.getItem(
                     position
                 )
@@ -1022,7 +1057,6 @@ class LibraryController(
         ) {
             recycler.scrollBy(0, recycler.paddingTop)
         }
-        activity?.appbar?.y = 0f
         if (lastItemPosition == toPosition) lastItemPosition = null
         else if (lastItemPosition == null) lastItemPosition = fromPosition
     }

app/src/main/java/eu/kanade/tachiyomi/util/view/ControllerExtensions.kt

@@ -61,7 +61,8 @@ fun Controller.scrollViewWith(
     customPadding: Boolean = false,
     swipeRefreshLayout: SwipeRefreshLayout? = null,
     afterInsets: ((WindowInsets) -> Unit)? = null,
-    liftOnScroll: ((Boolean) -> Unit)? = null
+    liftOnScroll: ((Boolean) -> Unit)? = null,
+    onLeavingController: (() -> Unit)? = null
 ): ((Boolean) -> Unit) {
     var statusBarHeight = -1
     activity?.appbar?.y = 0f
@@ -119,7 +120,7 @@ fun Controller.scrollViewWith(
             if (changeType.isEnter) {
                 elevateFunc(elevate)
                 if (fakeToolbarView?.parent != null) {
-                    val parent = recycler.parent as? ViewGroup ?: return
+                    val parent = fakeToolbarView?.parent as? ViewGroup ?: return
                     parent.removeView(fakeToolbarView)
                     fakeToolbarView = null
                 }
@@ -145,6 +146,7 @@ fun Controller.scrollViewWith(
                     params?.width = MATCH_PARENT
                     v.setBackgroundColor(v.context.getResourceColor(R.attr.colorSecondary))
                     v.layoutParams = params
+                    onLeavingController?.invoke()
                 }
                 elevationAnim?.cancel()
                 if (activity!!.toolbar.tag == randomTag) activity!!.toolbar.setOnClickListener(null)

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

@@ -27,7 +27,7 @@
                 android:layout_height="wrap_content"
                 android:paddingStart="16dp"
                 android:paddingEnd="12dp"
-                android:text="@string/display_as" />
+                android:text="@string/display" />
 
             <LinearLayout
                 android:layout_width="match_parent"
@@ -68,6 +68,14 @@
                     android:layout_marginEnd="12dp"
                     android:text="@string/show_all_categories" />
 
+                <com.google.android.material.checkbox.MaterialCheckBox
+                    android:id="@+id/category_show"
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:layout_marginStart="12dp"
+                    android:layout_marginEnd="12dp"
+                    android:text="@string/always_show_current_category" />
+
             </LinearLayout>
 
             <com.google.android.material.textview.MaterialTextView

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

@@ -26,8 +26,7 @@
                 android:id="@+id/category_layout"
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content"
-                android:layout_marginTop="?actionBarSize"
+                android:layout_marginTop="?actionBarSize" >
-                android:orientation="vertical">
 
                 <eu.kanade.tachiyomi.ui.library.category.CategoryRecyclerView
                     android:id="@+id/category_recycler"
@@ -69,6 +68,28 @@
         android:layout_height="match_parent"
         app:fastScrollerBubbleEnabled="true" />
 
+    <TextView
+        android:id="@+id/header_title"
+        style="@style/TextAppearance.MaterialComponents.Headline6"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_marginBottom="6dp"
+        android:background="@drawable/list_item_selector"
+        android:backgroundTint="?colorSecondary"
+        android:clickable="true"
+        android:elevation="5dp"
+        android:ellipsize="end"
+        android:focusable="true"
+        android:gravity="center"
+        android:inputType="none"
+        android:maxLines="1"
+        android:paddingStart="8dp"
+        android:paddingEnd="8dp"
+        android:paddingBottom="6dp"
+        android:textColor="?actionBarTintColor"
+        android:textSize="14sp"
+        tools:text="Category" />
+
     <eu.kanade.tachiyomi.widget.EmptyView
         android:id="@+id/empty_view"
         android:layout_width="wrap_content"

app/src/main/res/values/strings.xml

@@ -114,6 +114,7 @@
         library from the browse tab.</string>
     <string name="no_matches_for_filters">No matches found for your current filters</string>
     <string name="show_all_categories">Show all categories</string>
+    <string name="always_show_current_category">Always show current category</string>
     <string name="expand_all_categories">Expand all categories</string>
     <string name="collapse_all_categories">Collapse all categories</string>
     <string name="reorder_filters">Reorder filters</string>