Hide FAB on search suggestions

app/src/main/java/org/koitharu/kotatsu/main/ui/MainActivity.kt

@@ -42,8 +42,8 @@ import org.koitharu.kotatsu.history.ui.HistoryListFragment
 import org.koitharu.kotatsu.local.ui.LocalListFragment
 import org.koitharu.kotatsu.reader.ui.ReaderActivity
 import org.koitharu.kotatsu.remotelist.ui.RemoteListFragment
-import org.koitharu.kotatsu.search.ui.SearchActivity
 import org.koitharu.kotatsu.search.ui.MangaListActivity
+import org.koitharu.kotatsu.search.ui.SearchActivity
 import org.koitharu.kotatsu.search.ui.global.GlobalSearchActivity
 import org.koitharu.kotatsu.search.ui.suggestion.SearchSuggestionFragment
 import org.koitharu.kotatsu.search.ui.suggestion.SearchSuggestionListener
@@ -358,17 +358,19 @@ class MainActivity : BaseActivity<ActivityMainBinding>(),
 		supportFragmentManager.beginTransaction()
 			.replace(R.id.container, fragment, TAG_PRIMARY)
 			.commit()
-		if (fragment is HistoryListFragment) binding.fab.show() else binding.fab.hide()
+		adjustFabVisibility(topFragment = fragment)
 	}
 
 	private fun onSearchOpened() {
 		binding.drawer.setDrawerLockMode(DrawerLayout.LOCK_MODE_LOCKED_CLOSED)
 		drawerToggle.isDrawerIndicatorEnabled = false
+		adjustFabVisibility(isSearchOpened = true)
 	}
 
 	private fun onSearchClosed() {
 		binding.drawer.setDrawerLockMode(DrawerLayout.LOCK_MODE_UNLOCKED)
 		drawerToggle.isDrawerIndicatorEnabled = true
+		adjustFabVisibility(isSearchOpened = false)
 	}
 
 	private fun onFirstStart() {
@@ -383,4 +385,11 @@ class MainActivity : BaseActivity<ActivityMainBinding>(),
 			}
 		}
 	}
+
+	private fun adjustFabVisibility(
+		topFragment: Fragment? = supportFragmentManager.findFragmentByTag(TAG_PRIMARY),
+		isSearchOpened: Boolean = supportFragmentManager.findFragmentByTag(TAG_SEARCH)?.isVisible == true,
+	) {
+		if (!isSearchOpened && topFragment is HistoryListFragment) binding.fab.show() else binding.fab.hide()
+	}
 }