Replace bindgins to work with extensions

include/godot_cpp/classes/ref.hpp

@@ -0,0 +1,222 @@
+/*************************************************************************/
+/*  ref.hpp                                                              */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                      https://godotengine.org                          */
+/*************************************************************************/
+/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur.                 */
+/* Copyright (c) 2014-2021 Godot Engine contributors (cf. AUTHORS.md).   */
+/*                                                                       */
+/* 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_CPP_REF_HPP
+#define GODOT_CPP_REF_HPP
+
+#include <godot_cpp/core/defs.hpp>
+
+#include <godot_cpp/classes/object.hpp>
+#include <godot_cpp/classes/ref_counted.hpp>
+#include <godot_cpp/core/memory.hpp>
+#include <godot_cpp/variant/variant.hpp>
+
+namespace godot {
+
+// Helper class for RefCounted objects, same as Godot one.
+
+class RefCounted;
+
+template <class T>
+class Ref {
+	T *reference = nullptr;
+
+	void ref(const Ref &p_from) {
+		if (p_from.reference == reference) {
+			return;
+		}
+
+		unref();
+
+		reference = p_from.reference;
+		if (reference) {
+			reference->reference();
+		}
+	}
+
+	void ref_pointer(T *p_ref) {
+		ERR_FAIL_COND(!p_ref);
+
+		if (p_ref->init_ref()) {
+			reference = p_ref;
+		}
+	}
+
+public:
+	_FORCE_INLINE_ bool operator==(const T *p_ptr) const {
+		return reference == p_ptr;
+	}
+	_FORCE_INLINE_ bool operator!=(const T *p_ptr) const {
+		return reference != p_ptr;
+	}
+
+	_FORCE_INLINE_ bool operator<(const Ref<T> &p_r) const {
+		return reference < p_r.reference;
+	}
+	_FORCE_INLINE_ bool operator==(const Ref<T> &p_r) const {
+		return reference == p_r.reference;
+	}
+	_FORCE_INLINE_ bool operator!=(const Ref<T> &p_r) const {
+		return reference != p_r.reference;
+	}
+
+	_FORCE_INLINE_ T *operator->() {
+		return reference;
+	}
+
+	_FORCE_INLINE_ T *operator*() {
+		return reference;
+	}
+
+	_FORCE_INLINE_ const T *operator->() const {
+		return reference;
+	}
+
+	_FORCE_INLINE_ const T *ptr() const {
+		return reference;
+	}
+	_FORCE_INLINE_ T *ptr() {
+		return reference;
+	}
+
+	_FORCE_INLINE_ const T *operator*() const {
+		return reference;
+	}
+
+	operator Variant() const {
+		return Variant(reference);
+	}
+
+	void operator=(const Ref &p_from) {
+		ref(p_from);
+	}
+
+	template <class T_Other>
+	void operator=(const Ref<T_Other> &p_from) {
+		RefCounted *refb = const_cast<RefCounted *>(static_cast<const RefCounted *>(p_from.ptr()));
+		if (!refb) {
+			unref();
+			return;
+		}
+		Ref r;
+		r.reference = Object::cast_to<T>(refb);
+		ref(r);
+		r.reference = nullptr;
+	}
+
+	void operator=(const Variant &p_variant) {
+		// FIXME
+		// Object *object = p_variant.get_validated_object();
+
+		// if (object == reference) {
+		// 	return;
+		// }
+
+		// unref();
+
+		// if (!object) {
+		// 	return;
+		// }
+
+		// T *r = Object::cast_to<T>(object);
+		// if (r && r->reference()) {
+		// 	reference = r;
+		// }
+	}
+
+	template <class T_Other>
+	void reference_ptr(T_Other *p_ptr) {
+		if (reference == p_ptr) {
+			return;
+		}
+		unref();
+
+		T *r = Object::cast_to<T>(p_ptr);
+		if (r) {
+			ref_pointer(r);
+		}
+	}
+
+	Ref(const Ref &p_from) {
+		ref(p_from);
+	}
+
+	Ref(T *p_reference) {
+		if (p_reference) {
+			ref_pointer(p_reference);
+		}
+	}
+
+	Ref(const Variant &p_variant) {
+		// FIXME
+		// Object *object = p_variant.get_validated_object();
+
+		// if (!object) {
+		// 	return;
+		// }
+
+		// T *r = Object::cast_to<T>(object);
+		// if (r && r->reference()) {
+		// 	reference = r;
+		// }
+	}
+
+	inline bool is_valid() const { return reference != nullptr; }
+	inline bool is_null() const { return reference == nullptr; }
+
+	void unref() {
+		if (reference && reference->unreference()) {
+			memdelete(reference);
+		}
+		reference = nullptr;
+	}
+
+	void instantiate() {
+		ref(memnew(T));
+	}
+
+	Ref() {}
+
+	~Ref() {
+		unref();
+	}
+
+	// Used exclusively in the bindings to recreate the Ref Godot encapsulates in return values,
+	// without adding to the refcount.
+	inline static Ref<T> ___internal_constructor(Object *obj) {
+		Ref<T> r;
+		r.reference = (T *)obj;
+		return r;
+	}
+};
+
+} // namespace godot
+
+#endif // ! GODOT_CPP_REF_HPP