Add Script::inherits_script()

Partial cherry-pick of 5d4dc2d45c.

Co-authored-by: Juan Linietsky <reduzio@gmail.com>

core/script_language.h

@@ -119,6 +119,8 @@ public:
 
 	virtual Ref<Script> get_base_script() const = 0; //for script inheritance
 
+	virtual bool inherits_script(const Ref<Script> &p_script) const = 0;
+
 	virtual StringName get_instance_base_type() const = 0; // this may not work in all scripts, will return empty if so
 	virtual ScriptInstance *instance_create(Object *p_this) = 0;
 	virtual PlaceHolderScriptInstance *placeholder_instance_create(Object *p_this) { return nullptr; }

modules/gdnative/nativescript/nativescript.cpp

@@ -111,6 +111,11 @@ void NativeScript::_placeholder_erased(PlaceHolderScriptInstance *p_placeholder)
 
 #endif
 
+bool NativeScript::inherits_script(const Ref<Script> &p_script) const {
+	WARN_PRINT_ONCE("Inheritance needs to be implemented in NativeScript.");
+	return false;
+}
+
 void NativeScript::set_class_name(String p_class_name) {
 	class_name = p_class_name;
 }

modules/gdnative/nativescript/nativescript.h

@@ -130,6 +130,8 @@ protected:
 public:
 	inline NativeScriptDesc *get_script_desc() const;
 
+	bool inherits_script(const Ref<Script> &p_script) const;
+
 	void set_class_name(String p_class_name);
 	String get_class_name() const;
 

modules/gdnative/pluginscript/pluginscript_script.cpp

@@ -136,6 +136,11 @@ bool PluginScript::can_instance() const {
 	return can;
 }
 
+bool PluginScript::inherits_script(const Ref<Script> &p_script) const {
+	WARN_PRINT_ONCE("Inheritance needs to be implemented in PluginScript.");
+	return false;
+}
+
 Ref<Script> PluginScript::get_base_script() const {
 	if (_ref_base_parent.is_valid()) {
 		return Ref<PluginScript>(_ref_base_parent);

modules/gdnative/pluginscript/pluginscript_script.h

@@ -71,6 +71,8 @@ private:
 protected:
 	static void _bind_methods();
 
+	bool inherits_script(const Ref<Script> &p_script) const;
+
 	PluginScriptInstance *_create_instance(const Variant **p_args, int p_argcount, Object *p_owner, Variant::CallError &r_error);
 	Variant _new(const Variant **p_args, int p_argcount, Variant::CallError &r_error);
 

modules/gdscript/gdscript.cpp

@@ -815,6 +815,24 @@ Ref<GDScript> GDScript::get_base() const {
 	return base;
 }
 
+bool GDScript::inherits_script(const Ref<Script> &p_script) const {
+	Ref<GDScript> gd = p_script;
+	if (gd.is_null()) {
+		return false;
+	}
+
+	const GDScript *s = this;
+
+	while (s) {
+		if (s == p_script.ptr()) {
+			return true;
+		}
+		s = s->_base;
+	}
+
+	return false;
+}
+
 bool GDScript::has_script_signal(const StringName &p_signal) const {
 	if (_signals.has(p_signal)) {
 		return true;

modules/gdscript/gdscript.h

@@ -146,6 +146,8 @@ protected:
 public:
 	virtual bool is_valid() const { return valid; }
 
+	bool inherits_script(const Ref<Script> &p_script) const;
+
 	const Map<StringName, Ref<GDScript>> &get_subclasses() const { return subclasses; }
 	const Map<StringName, Variant> &get_constants() const { return constants; }
 	const Set<StringName> &get_members() const { return members; }

modules/mono/csharp_script.cpp

@@ -3205,6 +3205,16 @@ void CSharpScript::get_script_signal_list(List<MethodInfo> *r_signals) const {
 	}
 }
 
+bool CSharpScript::inherits_script(const Ref<Script> &p_script) const {
+	Ref<CSharpScript> cs = p_script;
+	if (cs.is_null()) {
+		return false;
+	}
+
+	WARN_PRINT_ONCE("Implement CSharpScript::inherits_script and other relevant changes after GH-38063.");
+	return false;
+}
+
 Ref<Script> CSharpScript::get_base_script() const {
 	// TODO search in metadata file once we have it, not important any way?
 	return Ref<Script>();

modules/mono/csharp_script.h

@@ -184,6 +184,8 @@ public:
 	virtual bool is_tool() const { return tool; }
 	virtual bool is_valid() const { return valid; }
 
+	bool inherits_script(const Ref<Script> &p_script) const;
+
 	virtual Ref<Script> get_base_script() const;
 	virtual ScriptLanguage *get_language() const;
 

modules/visual_script/visual_script.cpp

@@ -1265,6 +1265,10 @@ VisualScript::VisualScript() {
 	is_tool_script = false;
 }
 
+bool VisualScript::inherits_script(const Ref<Script> &p_script) const {
+	return this == p_script.ptr(); //there is no inheritance in visual scripts, so this is enough
+}
+
 StringName VisualScript::get_default_func() const {
 	return StringName("f_312843592");
 }

modules/visual_script/visual_script.h

@@ -260,6 +260,8 @@ protected:
 	static void _bind_methods();
 
 public:
+	bool inherits_script(const Ref<Script> &p_script) const;
+
 	// TODO: Remove it in future when breaking changes are acceptable
 	StringName get_default_func() const;
 	void add_function(const StringName &p_name);