Hide bottom nav on non-root controllers

app/src/main/java/eu/kanade/tachiyomi/ui/base/controller/RootController.kt

@@ -0,0 +1,3 @@
+package eu.kanade.tachiyomi.ui.base.controller
+
+interface RootController

app/src/main/java/eu/kanade/tachiyomi/ui/catalogue/CatalogueController.kt

@@ -23,6 +23,7 @@ import eu.kanade.tachiyomi.data.preference.getOrDefault
 import eu.kanade.tachiyomi.source.CatalogueSource
 import eu.kanade.tachiyomi.source.Source
 import eu.kanade.tachiyomi.ui.base.controller.NucleusController
+import eu.kanade.tachiyomi.ui.base.controller.RootController
 import eu.kanade.tachiyomi.ui.base.controller.requestPermissionsSafe
 import eu.kanade.tachiyomi.ui.base.controller.withFadeTransaction
 import eu.kanade.tachiyomi.ui.catalogue.browse.BrowseCatalogueController
@@ -40,6 +41,7 @@ import uy.kohesive.injekt.api.get
  * [CatalogueAdapter.OnLatestClickListener] call function data on latest item click
  */
 class CatalogueController : NucleusController<CataloguePresenter>(),
+        RootController,
         FlexibleAdapter.OnItemClickListener,
         FlexibleAdapter.OnItemLongClickListener,
         CatalogueAdapter.OnBrowseClickListener,

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

@@ -33,6 +33,7 @@ import eu.kanade.tachiyomi.data.library.LibraryUpdateService
 import eu.kanade.tachiyomi.data.preference.PreferencesHelper
 import eu.kanade.tachiyomi.data.preference.getOrDefault
 import eu.kanade.tachiyomi.ui.base.controller.NucleusController
+import eu.kanade.tachiyomi.ui.base.controller.RootController
 import eu.kanade.tachiyomi.ui.base.controller.SecondaryDrawerController
 import eu.kanade.tachiyomi.ui.base.controller.TabbedController
 import eu.kanade.tachiyomi.ui.base.controller.withFadeTransaction
@@ -54,6 +55,7 @@ class LibraryController(
     bundle: Bundle? = null,
     private val preferences: PreferencesHelper = Injekt.get()
 ) : NucleusController<LibraryPresenter>(bundle),
+        RootController,
         TabbedController,
         SecondaryDrawerController,
         ActionMode.Callback,

app/src/main/java/eu/kanade/tachiyomi/ui/main/MainActivity.kt

@@ -16,6 +16,7 @@ import eu.kanade.tachiyomi.data.notification.NotificationReceiver
 import eu.kanade.tachiyomi.ui.base.activity.BaseActivity
 import eu.kanade.tachiyomi.ui.base.controller.DialogController
 import eu.kanade.tachiyomi.ui.base.controller.NoToolbarElevationController
+import eu.kanade.tachiyomi.ui.base.controller.RootController
 import eu.kanade.tachiyomi.ui.base.controller.SecondaryDrawerController
 import eu.kanade.tachiyomi.ui.base.controller.TabbedController
 import eu.kanade.tachiyomi.ui.base.controller.withFadeTransaction
@@ -47,7 +48,8 @@ class MainActivity : BaseActivity() {
         }
     }
 
-    lateinit var tabAnimator: TabsAnimator
+    lateinit var tabAnimator: ViewHeightAnimator
+    lateinit var bottomNavAnimator: ViewHeightAnimator
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
@@ -62,7 +64,8 @@ class MainActivity : BaseActivity() {
 
         setSupportActionBar(toolbar)
 
-        tabAnimator = TabsAnimator(tabs)
+        tabAnimator = ViewHeightAnimator(tabs)
+        bottomNavAnimator = ViewHeightAnimator(bottom_nav)
 
         // Set behavior of bottom nav
         bottom_nav.setOnNavigationItemSelectedListener { item ->
@@ -220,6 +223,13 @@ class MainActivity : BaseActivity() {
 
         supportActionBar?.setDisplayHomeAsUpEnabled(router.backstackSize != 1)
 
+        if (from is RootController && to !is RootController) {
+            bottomNavAnimator.collapse()
+        }
+        if (to is RootController && from !is RootController) {
+            bottomNavAnimator.expand()
+        }
+
         if (from is TabbedController) {
             from.cleanupTabs(tabs)
         }

app/src/main/java/eu/kanade/tachiyomi/ui/main/ViewHeightAnimator.kt

@@ -1,45 +1,46 @@
 package eu.kanade.tachiyomi.ui.main
 
 import android.animation.ObjectAnimator
+import android.view.View
 import android.view.ViewTreeObserver
 import android.view.animation.DecelerateInterpolator
-import com.google.android.material.tabs.TabLayout
+import androidx.annotation.Keep
 
-class TabsAnimator(val tabs: TabLayout) {
+class ViewHeightAnimator(val view: View) {
 
     /**
-     * The default height of the tab layout. It's unknown until the view is layout.
+     * The default height of the view. It's unknown until the view is layout.
      */
-    private var tabsHeight = 0
+    private var height = 0
 
     /**
-     * Whether the last state of the tab layout is shown or hidden.
+     * Whether the last state of the view is shown or hidden.
      */
     private var isLastStateShown = true
 
     /**
-     * Animation used to expand and collapse the tab layout.
+     * Animation used to expand and collapse the view.
      */
     private val animation by lazy {
-        ObjectAnimator.ofInt(this, "height", tabsHeight).apply {
+        ObjectAnimator.ofInt(this, "height", height).apply {
             duration = 300L
             interpolator = DecelerateInterpolator()
         }
     }
 
     init {
-        tabs.viewTreeObserver.addOnGlobalLayoutListener(
+        view.viewTreeObserver.addOnGlobalLayoutListener(
                 object : ViewTreeObserver.OnGlobalLayoutListener {
                     override fun onGlobalLayout() {
-                        if (tabs.height > 0) {
+                        if (view.height > 0) {
-                            tabs.viewTreeObserver.removeOnGlobalLayoutListener(this)
+                            view.viewTreeObserver.removeOnGlobalLayoutListener(this)
 
                             // Save the tabs default height.
-                            tabsHeight = tabs.height
+                            height = view.height
 
                             // Now that we know the height, set the initial height.
                             if (isLastStateShown) {
-                                setHeight(tabsHeight)
+                                setHeight(height)
                             } else {
                                 setHeight(0)
                             }
@@ -54,9 +55,10 @@ class TabsAnimator(val tabs: TabLayout) {
      *
      * @param newHeight The new height of the tab layout.
      */
+    @Keep
     fun setHeight(newHeight: Int) {
-        tabs.layoutParams.height = newHeight
+        view.layoutParams.height = newHeight
-        tabs.requestLayout()
+        view.requestLayout()
     }
 
     /**
@@ -64,7 +66,7 @@ class TabsAnimator(val tabs: TabLayout) {
      * reflection.
      */
     fun getHeight(): Int {
-        return tabs.layoutParams.height
+        return view.layoutParams.height
     }
 
     /**
@@ -72,8 +74,8 @@ class TabsAnimator(val tabs: TabLayout) {
      */
     fun expand() {
         if (isMeasured) {
-            if (getHeight() != tabsHeight) {
+            if (getHeight() != height) {
-                animation.setIntValues(tabsHeight)
+                animation.setIntValues(height)
                 animation.start()
             } else {
                 animation.cancel()
@@ -101,5 +103,5 @@ class TabsAnimator(val tabs: TabLayout) {
      * Returns whether the tab layout has a known height.
      */
     private val isMeasured: Boolean
-        get() = tabsHeight > 0
+        get() = height > 0
 }

app/src/main/java/eu/kanade/tachiyomi/ui/more/MoreController.kt

@@ -2,6 +2,7 @@ package eu.kanade.tachiyomi.ui.more
 
 import androidx.preference.PreferenceScreen
 import eu.kanade.tachiyomi.R
+import eu.kanade.tachiyomi.ui.base.controller.RootController
 import eu.kanade.tachiyomi.ui.base.controller.withFadeTransaction
 import eu.kanade.tachiyomi.ui.download.DownloadController
 import eu.kanade.tachiyomi.ui.extension.ExtensionController
@@ -17,7 +18,7 @@ import eu.kanade.tachiyomi.util.preference.titleRes
 import eu.kanade.tachiyomi.util.system.getResourceColor
 import eu.kanade.tachiyomi.util.system.openInBrowser
 
-class MoreController : SettingsController() {
+class MoreController : SettingsController(), RootController {
 
     override fun setupPreferenceScreen(screen: PreferenceScreen) = with(screen) {
         titleRes = R.string.label_more

app/src/main/java/eu/kanade/tachiyomi/ui/recent_updates/RecentChaptersController.kt

@@ -20,6 +20,7 @@ import eu.kanade.tachiyomi.data.library.LibraryUpdateService
 import eu.kanade.tachiyomi.data.notification.Notifications
 import eu.kanade.tachiyomi.ui.base.controller.NoToolbarElevationController
 import eu.kanade.tachiyomi.ui.base.controller.NucleusController
+import eu.kanade.tachiyomi.ui.base.controller.RootController
 import eu.kanade.tachiyomi.ui.base.controller.popControllerWithTag
 import eu.kanade.tachiyomi.ui.base.controller.withFadeTransaction
 import eu.kanade.tachiyomi.ui.manga.MangaController
@@ -37,6 +38,7 @@ import timber.log.Timber
  * UI related actions should be called from here.
  */
 class RecentChaptersController : NucleusController<RecentChaptersPresenter>(),
+        RootController,
         NoToolbarElevationController,
         ActionMode.Callback,
         FlexibleAdapter.OnItemClickListener,

app/src/main/java/eu/kanade/tachiyomi/ui/recently_read/RecentlyReadController.kt

@@ -9,6 +9,7 @@ import eu.kanade.tachiyomi.R
 import eu.kanade.tachiyomi.data.database.models.History
 import eu.kanade.tachiyomi.data.database.models.Manga
 import eu.kanade.tachiyomi.ui.base.controller.NucleusController
+import eu.kanade.tachiyomi.ui.base.controller.RootController
 import eu.kanade.tachiyomi.ui.base.controller.withFadeTransaction
 import eu.kanade.tachiyomi.ui.manga.MangaController
 import eu.kanade.tachiyomi.ui.reader.ReaderActivity
@@ -22,6 +23,7 @@ import kotlinx.android.synthetic.main.recently_read_controller.recycler
  * UI related actions should be called from here.
  */
 class RecentlyReadController : NucleusController<RecentlyReadPresenter>(),
+        RootController,
         FlexibleAdapter.OnUpdateListener,
         RecentlyReadAdapter.OnRemoveClickListener,
         RecentlyReadAdapter.OnResumeClickListener,