Add a script method to get its class icon

Co-authored-by: Danil Alexeev <danil@alexeev.xyz>

modules/gdscript/doc_classes/@GDScript.xml

@@ -595,7 +595,7 @@
 			<return type="void" />
 			<param index="0" name="icon_path" type="String" />
 			<description>
-				Add a custom icon to the current script. The script must be registered as a global class using the [code]class_name[/code] keyword for this to have a visible effect. The icon specified at [param icon_path] is displayed in the Scene dock for every node of that class, as well as in various editor dialogs.
+				Add a custom icon to the current script. The icon specified at [param icon_path] is displayed in the Scene dock for every node of that class, as well as in various editor dialogs.
 				[codeblock]
 				@icon("res://path/to/class/icon.svg")
 				[/codeblock]

modules/gdscript/gdscript.cpp

@@ -482,6 +482,10 @@ void GDScript::_clear_doc() {
 	docs.clear();
 	doc = DocData::ClassDoc();
 }
+
+String GDScript::get_class_icon_path() const {
+	return simplified_icon_path;
+}
 #endif
 
 bool GDScript::_update_exports(bool *r_err, bool p_recursive_call, PlaceHolderScriptInstance *p_instance_to_update) {
@@ -2527,13 +2531,6 @@ String GDScriptLanguage::get_global_class_name(const String &p_path, String *r_b
 	 * Before changing this function, please ask the current maintainer of EditorFileSystem.
 	 */
 
-	if (r_icon_path) {
-		if (c->icon_path.is_empty() || c->icon_path.is_absolute_path()) {
-			*r_icon_path = c->icon_path.simplify_path();
-		} else if (c->icon_path.is_relative_path()) {
-			*r_icon_path = p_path.get_base_dir().path_join(c->icon_path).simplify_path();
-		}
-	}
 	if (r_base_type) {
 		const GDScriptParser::ClassNode *subclass = c;
 		String path = p_path;
@@ -2601,6 +2598,9 @@ String GDScriptLanguage::get_global_class_name(const String &p_path, String *r_b
 			}
 		}
 	}
+	if (r_icon_path) {
+		*r_icon_path = c->simplified_icon_path;
+	}
 	return c->identifier != nullptr ? String(c->identifier->name) : String();
 }
 

modules/gdscript/gdscript.h

@@ -144,6 +144,7 @@ class GDScript : public Script {
 	String path;
 	String name;
 	String fully_qualified_name;
+	String simplified_icon_path;
 	SelfList<GDScript> script_list;
 
 	SelfList<GDScriptFunctionState>::List pending_func_states;
@@ -250,6 +251,7 @@ public:
 	virtual Vector<DocData::ClassDoc> get_documentation() const override {
 		return docs;
 	}
+	virtual String get_class_icon_path() const override;
 #endif // TOOLS_ENABLED
 
 	virtual Error reload(bool p_keep_state = false) override;

modules/gdscript/gdscript_compiler.cpp

@@ -2928,6 +2928,7 @@ void GDScriptCompiler::convert_to_initializer_type(Variant &p_variant, const GDS
 void GDScriptCompiler::make_scripts(GDScript *p_script, const GDScriptParser::ClassNode *p_class, bool p_keep_state) {
 	p_script->fully_qualified_name = p_class->fqcn;
 	p_script->name = p_class->identifier ? p_class->identifier->name : "";
+	p_script->simplified_icon_path = p_class->simplified_icon_path;
 
 	HashMap<StringName, Ref<GDScript>> old_subclasses;
 

modules/gdscript/gdscript_parser.cpp

@@ -3836,18 +3836,31 @@ bool GDScriptParser::tool_annotation(const AnnotationNode *p_annotation, Node *p
 bool GDScriptParser::icon_annotation(const AnnotationNode *p_annotation, Node *p_node) {
 	ERR_FAIL_COND_V_MSG(p_node->type != Node::CLASS, false, R"("@icon" annotation can only be applied to classes.)");
 	ERR_FAIL_COND_V(p_annotation->resolved_arguments.is_empty(), false);
+
 	ClassNode *p_class = static_cast<ClassNode *>(p_node);
+	String path = p_annotation->resolved_arguments[0];
+
 #ifdef DEBUG_ENABLED
 	if (!p_class->icon_path.is_empty()) {
 		push_error(R"("@icon" annotation can only be used once.)", p_annotation);
 		return false;
 	}
-	if (String(p_annotation->resolved_arguments[0]).is_empty()) {
+	if (path.is_empty()) {
 		push_error(R"("@icon" annotation argument must contain the path to the icon.)", p_annotation->arguments[0]);
 		return false;
 	}
 #endif // DEBUG_ENABLED
-	p_class->icon_path = p_annotation->resolved_arguments[0];
+
+	p_class->icon_path = path;
+
+	if (path.is_empty() || path.is_absolute_path()) {
+		p_class->simplified_icon_path = path.simplify_path();
+	} else if (path.is_relative_path()) {
+		p_class->simplified_icon_path = script_path.get_base_dir().path_join(path).simplify_path();
+	} else {
+		p_class->simplified_icon_path = path;
+	}
+
 	return true;
 }
 

modules/gdscript/gdscript_parser.h

@@ -724,6 +724,7 @@ public:
 
 		IdentifierNode *identifier = nullptr;
 		String icon_path;
+		String simplified_icon_path;
 		Vector<Member> members;
 		HashMap<StringName, int> members_indices;
 		ClassNode *outer = nullptr;