Add `CallableCustom` that devs can use in their GDExtensions

2 files changed, 81 insertions, 21 deletions

diff --git a/include/godot_cpp/variant/callable_custom.hpp b/include/godot_cpp/variant/callable_custom.hpp
new file mode 100644
index 0000000..34328f9
--- /dev/null
+++ b/include/godot_cpp/variant/callable_custom.hpp
@@ -0,0 +1,64 @@
+/**************************************************************************/
+/*  callable_custom.hpp                                                   */
+/**************************************************************************/
+/*                         This file is part of:                          */
+/*                             GODOT ENGINE                               */
+/*                        https://godotengine.org                         */
+/**************************************************************************/
+/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
+/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                  */
+/*                                                                        */
+/* Permission is hereby granted, free of charge, to any person obtaining  */
+/* a copy of this software and associated documentation files (the        */
+/* "Software"), to deal in the Software without restriction, including    */
+/* without limitation the rights to use, copy, modify, merge, publish,    */
+/* distribute, sublicense, and/or sell copies of the Software, and to     */
+/* permit persons to whom the Software is furnished to do so, subject to  */
+/* the following conditions:                                              */
+/*                                                                        */
+/* The above copyright notice and this permission notice shall be         */
+/* included in all copies or substantial portions of the Software.        */
+/*                                                                        */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,        */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF     */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY   */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,   */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE      */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                 */
+/**************************************************************************/
+
+#ifndef GODOT_CALLABLE_CUSTOM_HPP
+#define GODOT_CALLABLE_CUSTOM_HPP
+
+#include <godot_cpp/core/object_id.hpp>
+#include <godot_cpp/variant/string_name.hpp>
+
+namespace godot {
+
+class Object;
+
+class CallableCustomBase {
+public:
+	virtual ObjectID get_object() const = 0;
+	virtual void call(const Variant **p_arguments, int p_argcount, Variant &r_return_value, GDExtensionCallError &r_call_error) const = 0;
+	virtual ~CallableCustomBase() {}
+};
+
+class CallableCustom : public CallableCustomBase {
+public:
+	typedef bool (*CompareEqualFunc)(const CallableCustom *p_a, const CallableCustom *p_b);
+	typedef bool (*CompareLessFunc)(const CallableCustom *p_a, const CallableCustom *p_b);
+
+	virtual uint32_t hash() const = 0;
+	virtual String get_as_text() const = 0;
+	virtual CompareEqualFunc get_compare_equal_func() const = 0;
+	virtual CompareLessFunc get_compare_less_func() const = 0;
+	virtual bool is_valid() const;
+	virtual ObjectID get_object() const = 0;
+	virtual void call(const Variant **p_arguments, int p_argcount, Variant &r_return_value, GDExtensionCallError &r_call_error) const = 0;
+};
+
+} // namespace godot
+
+#endif // GODOT_CALLABLE_CUSTOM_HPP
diff --git a/include/godot_cpp/variant/callable_method_pointer.hpp b/include/godot_cpp/variant/callable_method_pointer.hpp
index d83bcba..8559253 100644
--- a/include/godot_cpp/variant/callable_method_pointer.hpp
+++ b/include/godot_cpp/variant/callable_method_pointer.hpp
@@ -36,16 +36,12 @@
 
 namespace godot {
 
-class CallableCustomMethodPointerBase {
-public:
-	virtual Object *get_object() const = 0;
-	virtual void call(const Variant **p_arguments, int p_argcount, Variant &r_return_value, GDExtensionCallError &r_call_error) const = 0;
-	virtual ~CallableCustomMethodPointerBase() {}
+class CallableCustomMethodPointerBase : public CallableCustomBase {
 };
 
 namespace internal {
 
-Callable create_custom_callable(CallableCustomMethodPointerBase *p_callable_method_pointer);
+Callable create_callable_from_ccmp(CallableCustomMethodPointerBase *p_callable_method_pointer);
 
 } // namespace internal
 
@@ -59,8 +55,8 @@ class CallableCustomMethodPointer : public CallableCustomMethodPointerBase {
 	void (T::*method)(P...);
 
 public:
-	virtual Object *get_object() const override {
-		return instance;
+	virtual ObjectID get_object() const override {
+		return ObjectID(instance->get_instance_id());
 	}
 
 	virtual void call(const Variant **p_arguments, int p_argcount, Variant &r_return_value, GDExtensionCallError &r_call_error) const override {
@@ -77,7 +73,7 @@ template <class T, class... P>
 Callable create_custom_callable_function_pointer(T *p_instance, void (T::*p_method)(P...)) {
 	typedef CallableCustomMethodPointer<T, P...> CCMP;
 	CCMP *ccmp = memnew(CCMP(p_instance, p_method));
-	return ::godot::internal::create_custom_callable(ccmp);
+	return ::godot::internal::create_callable_from_ccmp(ccmp);
 }
 
 //
@@ -91,8 +87,8 @@ class CallableCustomMethodPointerRet : public CallableCustomMethodPointerBase {
 	(P...);
 
 public:
-	virtual Object *get_object() const override {
-		return instance;
+	virtual ObjectID get_object() const override {
+		return ObjectID(instance->get_instance_id());
 	}
 
 	virtual void call(const Variant **p_arguments, int p_argcount, Variant &r_return_value, GDExtensionCallError &r_call_error) const override {
@@ -109,7 +105,7 @@ template <class T, class R, class... P>
 Callable create_custom_callable_function_pointer(T *p_instance, R (T::*p_method)(P...)) {
 	typedef CallableCustomMethodPointerRet<T, R, P...> CCMP; // Messes with memnew otherwise.
 	CCMP *ccmp = memnew(CCMP(p_instance, p_method));
-	return ::godot::internal::create_custom_callable(ccmp);
+	return ::godot::internal::create_callable_from_ccmp(ccmp);
 }
 
 //
@@ -123,8 +119,8 @@ class CallableCustomMethodPointerRetC : public CallableCustomMethodPointerBase {
 	(P...) const;
 
 public:
-	virtual Object *get_object() const override {
-		return instance;
+	virtual ObjectID get_object() const override {
+		return ObjectID(instance->get_instance_id());
 	}
 
 	virtual void call(const Variant **p_arguments, int p_argcount, Variant &r_return_value, GDExtensionCallError &r_call_error) const override {
@@ -141,7 +137,7 @@ template <class T, class R, class... P>
 Callable create_custom_callable_function_pointer(const T *p_instance, R (T::*p_method)(P...) const) {
 	typedef CallableCustomMethodPointerRetC<T, R, P...> CCMP; // Messes with memnew otherwise.
 	CCMP *ccmp = memnew(CCMP(p_instance, p_method));
-	return ::godot::internal::create_custom_callable(ccmp);
+	return ::godot::internal::create_callable_from_ccmp(ccmp);
 }
 
 //
@@ -153,8 +149,8 @@ class CallableCustomStaticMethodPointer : public CallableCustomMethodPointerBase
 	void (*method)(P...);
 
 public:
-	virtual Object *get_object() const override {
-		return nullptr;
+	virtual ObjectID get_object() const override {
+		return ObjectID();
 	}
 
 	virtual void call(const Variant **p_arguments, int p_argcount, Variant &r_return_value, GDExtensionCallError &r_call_error) const override {
@@ -171,7 +167,7 @@ template <class... P>
 Callable create_custom_callable_static_function_pointer(void (*p_method)(P...)) {
 	typedef CallableCustomStaticMethodPointer<P...> CCMP;
 	CCMP *ccmp = memnew(CCMP(p_method));
-	return ::godot::internal::create_custom_callable(ccmp);
+	return ::godot::internal::create_callable_from_ccmp(ccmp);
 }
 
 //
@@ -184,8 +180,8 @@ class CallableCustomStaticMethodPointerRet : public CallableCustomMethodPointerB
 	(P...);
 
 public:
-	virtual Object *get_object() const override {
-		return nullptr;
+	virtual ObjectID get_object() const override {
+		return ObjectID();
 	}
 
 	virtual void call(const Variant **p_arguments, int p_argcount, Variant &r_return_value, GDExtensionCallError &r_call_error) const override {
@@ -201,7 +197,7 @@ template <class R, class... P>
 Callable create_custom_callable_static_function_pointer(R (*p_method)(P...)) {
 	typedef CallableCustomStaticMethodPointerRet<R, P...> CCMP;
 	CCMP *ccmp = memnew(CCMP(p_method));
-	return ::godot::internal::create_custom_callable(ccmp);
+	return ::godot::internal::create_callable_from_ccmp(ccmp);
 }
 
 //