Merge 14cfb14ab9 into 760af804c0

This commit introduces a comprehensive Tree Search feature, including:
- Tree highlighting: Highlights items that match the search query.
- Tree filtering: Filters items so only matches and descendants are
  shown.
- Counting descendants: Shows the number of matching items within collapsed branches.
- Jump to next match: on enter.
- (Limbo-)Shortcut: Default CTRL-F.
- Menu entry: Misc->Search Tree.
- Remember separate SearchInfo for each tab.

Key implementation details:
- Optimized performance for large trees
- Implemented recursive filtering for efficiency
- Added UI elements including next/previous match buttons

Development History:
- Initial implementation of highlighting and filtering
- Multiple rounds of performance optimization
- Bug fixes and refactoring for correctness
- UI enhancements and polish
- Code cleanup and style improvements

editor/tree_search.cpp

@@ -238,14 +238,18 @@ void TreeSearch::_update_ordered_tree_items(TreeItem *p_tree_item) {
 
 void TreeSearch::_update_number_matches() {
 	ERR_FAIL_COND(!tree_reference);
-
 	number_matches.clear();
 	number_matches.reserve(ordered_tree_items.size());
 
+	TreeItem * tree_root = tree_reference->get_root();
+	if (!tree_root){
+		return;
+	}
 	_update_number_matches(tree_reference->get_root());
 }
 
 void TreeSearch::_update_number_matches(TreeItem *item) {
+	ERR_FAIL_COND(!item);
 	for (int i = 0; i < item->get_child_count(); i++) {
 		TreeItem *child = item->get_child(i);
 		_update_number_matches(child);
@@ -264,7 +268,7 @@ void TreeSearch::_update_number_matches(TreeItem *item) {
 }
 
 String TreeSearch::_get_search_mask() const {
-	ERR_FAIL_COND_V(!search_panel, "");
+	ERR_FAIL_COND(!search_panel);
 	return search_panel->get_text();
 }
 
@@ -524,7 +528,6 @@ void TreeSearchPanel::_initialize_controls() {
 	find_next_button->set_theme_type_variation(LW_NAME(FlatButton));
 	find_prev_button->set_theme_type_variation(LW_NAME(FlatButton));
 
-	close_button->set_tooltip_text("Hide");
 	find_next_button->set_tooltip_text("Next Match");
 	find_prev_button->set_tooltip_text("Previous Match");
 
@@ -559,7 +562,7 @@ void TreeSearchPanel::_notification(int p_what) {
 			// Close callbacks
 			close_button->connect(LW_NAME(pressed), Callable(this, LW_NAME(set_visible)).bind(false));
 			close_button->connect(LW_NAME(pressed), Callable(this, LW_NAME(emit_signal)).bind(LW_NAME(Close)));
-			close_button->set_shortcut(LW_GET_SHORTCUT("limbo_ai/hide_tree_search")); // TODO: use internal shortcut.
+			close_button->set_shortcut(LW_GET_SHORTCUT("limbo_ai/hide_tree_search")); // TODO: use internal shortcut. also sets tooltip...
 			// Search callbacks
 			Callable c_update_requested = Callable(this, LW_NAME(emit_signal)).bind("update_requested");
 			Callable c_text_submitted = Callable(this, LW_NAME(emit_signal)).bind(LW_NAME(text_submitted));