fix: 'NoResultsWidget' coming up for a fraction of a second on the first query

lib/models/search/index_of_indexed_stack.dart

@@ -1,9 +1,15 @@
 import "package:flutter/material.dart";
 
+enum SearchState {
+  empty,
+  searching,
+  notEmpty,
+}
+
 class IndexOfStackNotifier with ChangeNotifier {
   int _index = 0;
   bool _isSearchQueryEmpty = true;
-  bool _isSearchResultsEmpty = true;
+  SearchState _searchState = SearchState.empty;
 
   static IndexOfStackNotifier? _instance;
 
@@ -16,20 +22,20 @@ class IndexOfStackNotifier with ChangeNotifier {
     setIndex();
   }
 
-  set isSearchResultsEmpty(bool value) {
-    _isSearchResultsEmpty = value;
+  set searchState(SearchState value) {
+    _searchState = value;
     setIndex();
   }
 
   setIndex() {
-    if (_isSearchResultsEmpty) {
-      if (_isSearchQueryEmpty) {
-        _index = 0;
-      } else {
-        _index = 2;
-      }
+    if (_isSearchQueryEmpty) {
+      _index = 0;
     } else {
-      _index = 1;
+      if (_searchState == SearchState.empty) {
+        _index = 2;
+      } else {
+        _index = 1;
+      }
     }
     notifyListeners();
   }

lib/ui/viewer/search/search_suggestions.dart

@@ -44,6 +44,7 @@ class _SearchSuggestionsWidgetState extends State<SearchSuggestionsWidget> {
   void initState() {
     super.initState();
     SearchWidgetState.searchResultsStreamNotifier.addListener(() {
+      IndexOfStackNotifier().searchState = SearchState.searching;
       final resultsStream = SearchWidgetState.searchResultsStreamNotifier.value;
 
       searchResultWidgets.clear();
@@ -58,7 +59,7 @@ class _SearchSuggestionsWidgetState extends State<SearchSuggestionsWidget> {
           //search bar is cleared, and the event fired by the stream will be an
           //empty list. Can optimize rebuilds if there are performance issues in future.
           if (searchResults.isNotEmpty) {
-            IndexOfStackNotifier().isSearchResultsEmpty = false;
+            IndexOfStackNotifier().searchState = SearchState.notEmpty;
           }
           queueOfSearchResults.add(searchResults);
         },
@@ -67,7 +68,7 @@ class _SearchSuggestionsWidgetState extends State<SearchSuggestionsWidget> {
               const Duration(milliseconds: _surfaceNewResultsInterval + 20),
               () {
             if (searchResultWidgets.isEmpty) {
-              IndexOfStackNotifier().isSearchResultsEmpty = true;
+              IndexOfStackNotifier().searchState = SearchState.empty;
             }
           });
         },

lib/ui/viewer/search/search_widget.dart

@@ -93,11 +93,10 @@ class SearchWidgetState extends State<SearchWidget> {
   }
 
   Future<void> textControllerListener() async {
-    final query = textController.text;
-    IndexOfStackNotifier().isSearchQueryEmpty = query.isEmpty;
-
     _debouncer.run(() async {
       if (mounted) {
+        final query = textController.text;
+        IndexOfStackNotifier().isSearchQueryEmpty = query.isEmpty;
         searchResultsStreamNotifier.value =
             _getSearchResultsStream(context, query);
       }