Replace bindgins to work with extensions

2 files changed, 389 insertions, 0 deletions

diff --git a/include/godot_cpp/classes/ref.hpp b/include/godot_cpp/classes/ref.hpp
new file mode 100644
index 0000000..2140ef3
--- /dev/null
+++ b/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
diff --git a/include/godot_cpp/classes/wrapped.hpp b/include/godot_cpp/classes/wrapped.hpp
new file mode 100644
index 0000000..770224a
--- /dev/null
+++ b/include/godot_cpp/classes/wrapped.hpp
@@ -0,0 +1,167 @@
+/*************************************************************************/
+/*  wrapped.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_WRAPPED_HPP
+#define GODOT_CPP_WRAPPED_HPP
+
+#include <godot_cpp/core/memory.hpp>
+
+namespace godot {
+namespace internal {
+struct empty_constructor {};
+} // namespace internal
+
+typedef void GodotObject;
+
+// Base for all engine classes, to contain the pointer to the engine instance.
+class Wrapped {
+	friend class GDExtensionBinding;
+
+	// Private constructor, this should not be created directly by users.
+	Wrapped(GodotObject *p_owner) :
+			_owner(p_owner) {}
+
+protected:
+	Wrapped() = default;
+	Wrapped(internal::empty_constructor empty) {}
+
+public:
+	// Must be public but you should not touch this.
+	GodotObject *_owner = nullptr;
+};
+
+} // namespace godot
+
+#define GDCLASS(m_class, m_inherits)                                                                               \
+private:                                                                                                           \
+	friend class ClassDB;                                                                                          \
+                                                                                                                   \
+	using SelfType = m_class;                                                                                      \
+                                                                                                                   \
+protected:                                                                                                         \
+	static void (*_get_bind_methods())() {                                                                         \
+		return &m_class::_bind_methods;                                                                            \
+	}                                                                                                              \
+                                                                                                                   \
+	m_class(godot::GodotObject *owner) : m_inherits(godot::internal::empty_constructor()) {                        \
+		_owner = owner;                                                                                            \
+	}                                                                                                              \
+                                                                                                                   \
+	m_class(godot::internal::empty_constructor empty) : m_inherits(empty) {}                                       \
+                                                                                                                   \
+public:                                                                                                            \
+	static void initialize_class() {                                                                               \
+		static bool initialized = false;                                                                           \
+		if (initialized) {                                                                                         \
+			return;                                                                                                \
+		}                                                                                                          \
+		m_inherits::initialize_class();                                                                            \
+		if (m_class::_get_bind_methods() != m_inherits::_get_bind_methods()) {                                     \
+			_bind_methods();                                                                                       \
+		}                                                                                                          \
+		initialized = true;                                                                                        \
+	}                                                                                                              \
+                                                                                                                   \
+	static const char *get_class_static() {                                                                        \
+		return #m_class;                                                                                           \
+	}                                                                                                              \
+                                                                                                                   \
+	static const char *get_parent_class_static() {                                                                 \
+		return #m_inherits;                                                                                        \
+	}                                                                                                              \
+                                                                                                                   \
+	static GDExtensionClassInstancePtr create(void *data) {                                                        \
+		return (GDExtensionClassInstancePtr)godot::Memory::alloc_static(sizeof(m_class));                          \
+	}                                                                                                              \
+                                                                                                                   \
+	static void free(void *data, GDExtensionClassInstancePtr ptr) {                                                \
+		godot::memdelete(reinterpret_cast<m_class *>(ptr));                                                        \
+	}                                                                                                              \
+                                                                                                                   \
+	static void set_object_instance(GDExtensionClassInstancePtr p_instance, GDNativeObjectPtr p_object_instance) { \
+		memnew_placement((void *)p_instance, m_class((godot::GodotObject *)p_object_instance));                    \
+	}                                                                                                              \
+                                                                                                                   \
+	static void *___binding_create_callback(void *p_token, void *p_instance) {                                     \
+		return memnew(m_class((godot::GodotObject *)p_instance));                                                  \
+	}                                                                                                              \
+	static void ___binding_free_callback(void *p_token, void *p_instance, void *p_binding) {                       \
+		memdelete((m_class *)p_binding);                                                                           \
+	}                                                                                                              \
+	static GDNativeBool ___binding_reference_callback(void *p_token, void *p_instance, GDNativeBool p_reference) { \
+		return true;                                                                                               \
+	}                                                                                                              \
+	static constexpr GDNativeInstanceBindingCallbacks ___binding_callbacks = {                                     \
+		___binding_create_callback,                                                                                \
+		___binding_free_callback,                                                                                  \
+		___binding_reference_callback,                                                                             \
+	};                                                                                                             \
+                                                                                                                   \
+private:
+
+// Don't use this for your classes, use GDCLASS() instead.
+#define GDNATIVE_CLASS(m_class, m_inherits)                                                                        \
+protected:                                                                                                         \
+	static void (*_get_bind_methods())() {                                                                         \
+		return nullptr;                                                                                            \
+	}                                                                                                              \
+	m_class(godot::internal::empty_constructor empty) : m_inherits(empty) {}                                       \
+                                                                                                                   \
+public:                                                                                                            \
+	static void initialize_class() {}                                                                              \
+                                                                                                                   \
+	static const char *get_class_static() {                                                                        \
+		return #m_class;                                                                                           \
+	}                                                                                                              \
+                                                                                                                   \
+	static const char *get_parent_class_static() {                                                                 \
+		return #m_inherits;                                                                                        \
+	}                                                                                                              \
+                                                                                                                   \
+	static void *___binding_create_callback(void *p_token, void *p_instance) {                                     \
+		m_class *obj = memnew(m_class(godot::internal::empty_constructor()));                                      \
+		obj->_owner = (godot::GodotObject *)p_instance;                                                            \
+		return obj;                                                                                                \
+	}                                                                                                              \
+	static void ___binding_free_callback(void *p_token, void *p_instance, void *p_binding) {                       \
+		memdelete((m_class *)p_binding);                                                                           \
+	}                                                                                                              \
+	static GDNativeBool ___binding_reference_callback(void *p_token, void *p_instance, GDNativeBool p_reference) { \
+		return true;                                                                                               \
+	}                                                                                                              \
+	static constexpr GDNativeInstanceBindingCallbacks ___binding_callbacks = {                                     \
+		___binding_create_callback,                                                                                \
+		___binding_free_callback,                                                                                  \
+		___binding_reference_callback,                                                                             \
+	};                                                                                                             \
+                                                                                                                   \
+private:
+
+#endif // ! GODOT_CPP_WRAPPED_HPP