Fix #8819. Adds _import_node() that, when used in conjunction with _import_scene, recurses through the scene tree and exports all available nodes.

editor/plugins/tile_set_editor_plugin.cpp

@@ -35,24 +35,19 @@ void TileSetEditor::edit(const Ref<TileSet> &p_tileset) {
 	tileset = p_tileset;
 }
 
-void TileSetEditor::_import_scene(Node *scene, Ref<TileSet> p_library, bool p_merge) {
 
-	if (!p_merge)
-		p_library->clear();
-
-	for (int i = 0; i < scene->get_child_count(); i++) {
+void TileSetEditor::_import_node(Node *p_node, Ref<TileSet> p_library) {
 
-		Node *child = scene->get_child(i);
+	for (int i = 0; i < p_node->get_child_count(); i++) {
 
-		if (!child->cast_to<Sprite>()) {
-			if (child->get_child_count() > 0) {
-				child = child->get_child(0);
-				if (!child->cast_to<Sprite>()) {
-					continue;
-				}
+		Node *child = p_node->get_child(i);
 
-			} else
-				continue;
+		if(!child->cast_to<Sprite>()) {
+			if(child->get_child_count() > 0) {
+				_import_node(child, p_library);
+			}
+      
+			continue;
 		}
 
 		Sprite *mi = child->cast_to<Sprite>();
@@ -136,6 +131,13 @@ void TileSetEditor::_import_scene(Node *scene, Ref<TileSet> p_library, bool p_me
 	}
 }
 
+void TileSetEditor::_import_scene(Node *p_scene, Ref<TileSet> p_library, bool p_merge) {
+	if (!p_merge)
+		p_library->clear();
+
+	_import_node(p_scene, p_library);
+}
+
 void TileSetEditor::_menu_confirm() {
 
 	switch (option) {

editor/plugins/tile_set_editor_plugin.h

@@ -59,6 +59,7 @@ class TileSetEditor : public Control {
 	void _menu_confirm();
 	void _name_dialog_confirm(const String &name);
 
+	static void _import_node(Node *p_node, Ref<TileSet> p_library);
 	static void _import_scene(Node *p_scene, Ref<TileSet> p_library, bool p_merge);
 
 protected: