/**************************************************************************/
/* wrapped.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_WRAPPED_HPP
#define GODOT_WRAPPED_HPP
#include <godot_cpp/core/memory.hpp>
#include <godot_cpp/core/property_info.hpp>
#include <godot_cpp/templates/list.hpp>
#include <godot_cpp/templates/vector.hpp>
#include <godot_cpp/godot.hpp>
namespace godot {
class ClassDB;
typedef void GodotObject;
template <typename T, std::enable_if_t<std::is_base_of<::godot::Wrapped, T>::value, bool> = true>
_ALWAYS_INLINE_ void _pre_initialize();
// Base for all engine classes, to contain the pointer to the engine instance.
class Wrapped {
friend class GDExtensionBinding;
friend class ClassDB;
friend void postinitialize_handler(Wrapped *);
template <typename T, std::enable_if_t<std::is_base_of<::godot::Wrapped, T>::value, bool>>
friend _ALWAYS_INLINE_ void _pre_initialize();
thread_local static const StringName *_constructing_extension_class_name;
thread_local static const GDExtensionInstanceBindingCallbacks *_constructing_class_binding_callbacks;
template <typename T>
_ALWAYS_INLINE_ static void _set_construct_info() {
_constructing_extension_class_name = T::_get_extension_class_name();
_constructing_class_binding_callbacks = &T::_gde_binding_callbacks;
}
protected:
virtual bool _is_extension_class() const { return false; }
static const StringName *_get_extension_class_name(); // This is needed to retrieve the class name before the godot object has its _extension and _extension_instance members assigned.
#ifdef HOT_RELOAD_ENABLED
struct RecreateInstance {
GDExtensionClassInstancePtr wrapper;
GDExtensionObjectPtr owner;
RecreateInstance *next;
};
inline static RecreateInstance *recreate_instance = nullptr;
#endif
void _notification(int p_what) {}
bool _set(const StringName &p_name, const Variant &p_property) { return false; }
bool _get(const StringName &p_name, Variant &r_property) const { return false; }
void _get_property_list(List<PropertyInfo> *p_list) const {}
bool _property_can_revert(const StringName &p_name) const { return false; }
bool _property_get_revert(const StringName &p_name, Variant &r_property) const { return false; }
void _validate_property(PropertyInfo &p_property) const {}
String _to_string() const { return "[" + String(get_class_static()) + ":" + itos(get_instance_id()) + "]"; }
static void notification_bind(GDExtensionClassInstancePtr p_instance, int32_t p_what, GDExtensionBool p_reversed) {}
static GDExtensionBool set_bind(GDExtensionClassInstancePtr p_instance, GDExtensionConstStringNamePtr p_name, GDExtensionConstVariantPtr p_value) { return false; }
static GDExtensionBool get_bind(GDExtensionClassInstancePtr p_instance, GDExtensionConstStringNamePtr p_name, GDExtensionVariantPtr r_ret) { return false; }
static const GDExtensionPropertyInfo *get_property_list_bind(GDExtensionClassInstancePtr p_instance, uint32_t *r_count) { return nullptr; }
static void free_property_list_bind(GDExtensionClassInstancePtr p_instance, const GDExtensionPropertyInfo *p_list, uint32_t p_count) {}
static GDExtensionBool property_can_revert_bind(GDExtensionClassInstancePtr p_instance, GDExtensionConstStringNamePtr p_name) { return false; }
static GDExtensionBool property_get_revert_bind(GDExtensionClassInstancePtr p_instance, GDExtensionConstStringNamePtr p_name, GDExtensionVariantPtr r_ret) { return false; }
static GDExtensionBool validate_property_bind(GDExtensionClassInstancePtr p_instance, GDExtensionPropertyInfo *p_property) { return false; }
static void to_string_bind(GDExtensionClassInstancePtr p_instance, GDExtensionBool *r_is_valid, GDExtensionStringPtr r_out) {}
// The only reason this has to be held here, is when we return results of `_get_property_list` to Godot, we pass
// pointers to strings in this list. They have to remain valid to pass the bridge, until the list is freed by Godot...
::godot::List<::godot::PropertyInfo> plist_owned;
void _postinitialize();
virtual void _notificationv(int32_t p_what, bool p_reversed = false) {}
Wrapped(const StringName p_godot_class);
Wrapped(GodotObject *p_godot_object);
virtual ~Wrapped() {}
public:
static const StringName &get_class_static() {
static const StringName string_name = StringName("Wrapped");
return string_name;
}
uint64_t get_instance_id() const {
return 0;
}
// Must be public but you should not touch this.
GodotObject *_owner = nullptr;
};
template <typename T, std::enable_if_t<std::is_base_of<::godot::Wrapped, T>::value, bool>>
_ALWAYS_INLINE_ void _pre_initialize() {
Wrapped::_set_construct_info<T>();
}
_FORCE_INLINE_ void snarray_add_str(Vector<StringName> &arr) {
}
_FORCE_INLINE_ void snarray_add_str(Vector<StringName> &arr, const StringName &p_str) {
arr.push_back(p_str);
}
template <typename... P>
_FORCE_INLINE_ void snarray_add_str(Vector<StringName> &arr, const StringName &p_str, P... p_args) {
arr.push_back(p_str);
snarray_add_str(arr, p_args...);
}
template <typename... P>
_FORCE_INLINE_ Vector<StringName> snarray(P... p_args) {
Vector<StringName> arr;
snarray_add_str(arr, p_args...);
return arr;
}
namespace internal {
GDExtensionPropertyInfo *create_c_property_list(const ::godot::List<::godot::PropertyInfo> &plist_cpp, uint32_t *r_size);
void free_c_property_list(GDExtensionPropertyInfo *plist);
typedef void (*EngineClassRegistrationCallback)();
void add_engine_class_registration_callback(EngineClassRegistrationCallback p_callback);
void register_engine_class(const StringName &p_name, const GDExtensionInstanceBindingCallbacks *p_callbacks);
void register_engine_classes();
template <typename T>
struct EngineClassRegistration {
EngineClassRegistration() {
add_engine_class_registration_callback(&EngineClassRegistration<T>::callback);
}
static void callback() {
register_engine_class(T::get_class_static(), &T::_gde_binding_callbacks);
}
};
} // namespace internal
} // namespace godot
// Use this on top of your own classes.
// Note: the trail of `***` is to keep sane diffs in PRs, because clang-format otherwise moves every `\` which makes
// every line of the macro different
#define GDCLASS(m_class, m_inherits) /***********************************************************************************************************************************************/ \
private: \
void operator=(const m_class &p_rval) {} \
friend class ::godot::ClassDB; \
friend class ::godot::Wrapped; \
\
protected: \
virtual bool _is_extension_class() const override { return true; } \
\
static const ::godot::StringName *_get_extension_class_name() { \
const ::godot::StringName &string_name = get_class_static(); \
return &string_name; \
} \
\
static void (*_get_bind_methods())() { \
return &m_class::_bind_methods; \
} \
\
static void (::godot::Wrapped::*_get_notification())(int) { \
return (void(::godot::Wrapped::*)(int)) & m_class::_notification; \
} \
\
static bool (::godot::Wrapped::*_get_set())(const ::godot::StringName &p_name, const ::godot::Variant &p_property) { \
return (bool(::godot::Wrapped::*)(const ::godot::StringName &p_name, const ::godot::Variant &p_property)) & m_class::_set; \
} \
\
static bool (::godot::Wrapped::*_get_get())(const ::godot::StringName &p_name, ::godot::Variant &r_ret) const { \
return (bool(::godot::Wrapped::*)(const ::godot::StringName &p_name, ::godot::Variant &r_ret) const) & m_class::_get; \
} \
\
static void (::godot::Wrapped::*_get_get_property_list())(::godot::List<::godot::PropertyInfo> * p_list) const { \
return (void(::godot::Wrapped::*)(::godot::List<::godot::PropertyInfo> * p_list) const) & m_class::_get_property_list; \
} \
\
static bool (::godot::Wrapped::*_get_property_can_revert())(const ::godot::StringName &p_name) const { \
return (bool(::godot::Wrapped::*)(const ::godot::StringName &p_name) const) & m_class::_property_can_revert; \
} \
\
static bool (::godot::Wrapped::*_get_property_get_revert())(const ::godot::StringName &p_name, ::godot::Variant &) const { \
return (bool(::godot::Wrapped::*)(const ::godot::StringName &p_name, ::godot::Variant &) const) & m_class::_property_get_revert; \
} \
\
static void (::godot::Wrapped::*_get_validate_property())(::godot::PropertyInfo & p_property) const { \
return (void(::godot::Wrapped::*)(::godot::PropertyInfo & p_property) const) & m_class::_validate_property; \
} \
\
static ::godot::String (::godot::Wrapped::*_get_to_string())() const { \
return (::godot::String(::godot::Wrapped::*)() const) & m_class::_to_string; \
} \
\
template <typename T, typename B> \
static void register_virtuals() { \
m_inherits::register_virtuals<T, B>(); \
} \
\
public: \
typedef m_class self_type; \
typedef m_inherits parent_type; \
\
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(); \
m_inherits::register_virtuals<m_class, m_inherits>(); \
} \
initialized = true; \
} \
\
static const ::godot::StringName &get_class_static() { \
static const ::godot::StringName string_name = ::godot::StringName(#m_class); \
return string_name; \
} \
\
static const ::godot::StringName &get_parent_class_static() { \
return m_inherits::get_class_static(); \
} \
\
static void notification_bind(GDExtensionClassInstancePtr p_instance, int32_t p_what, GDExtensionBool p_reversed) { \
if (p_instance && m_class::_get_notification()) { \
if (!p_reversed) { \
m_inherits::notification_bind(p_instance, p_what, p_reversed); \
} \
if (m_class::_get_notification() != m_inherits::_get_notification()) { \
m_class *cls = reinterpret_cast<m_class *>(p_instance); \
cls->_notification(p_what); \
} \
if (p_reversed) { \
m_inherits::notification_bind(p_instance, p_what, p_reversed); \
} \
} \
} \
\
static GDExtensionBool set_bind(GDExtensionClassInstancePtr p_instance, GDExtensionConstStringNamePtr p_name, GDExtensionConstVariantPtr p_value) { \
if (p_instance) { \
if (m_inherits::set_bind(p_instance, p_name, p_value)) { \
return true; \
} \
if (m_class::_get_set() != m_inherits::_get_set()) { \
m_class *cls = reinterpret_cast<m_class *>(p_instance); \
return cls->_set(*reinterpret_cast<const ::godot::StringName *>(p_name), *reinterpret_cast<const ::godot::Variant *>(p_value)); \
} \
} \
return false; \
} \
\
static GDExtensionBool get_bind(GDExtensionClassInstancePtr p_instance, GDExtensionConstStringNamePtr p_name, GDExtensionVariantPtr r_ret) { \
if (p_instance) { \
if (m_inherits::get_bind(p_instance, p_name, r_ret)) { \
return true; \
} \
if (m_class::_get_get() != m_inherits::_get_get()) { \
m_class *cls = reinterpret_cast<m_class *>(p_instance); \
return cls->_get(*reinterpret_cast<const ::godot::StringName *>(p_name), *reinterpret_cast<::godot::Variant *>(r_ret)); \
} \
} \
return false; \
} \
\
static inline bool has_get_property_list() { \
return m_class::_get_get_property_list() && m_class::_get_get_property_list() != m_inherits::_get_get_property_list(); \
} \
\
static const GDExtensionPropertyInfo *get_property_list_bind(GDExtensionClassInstancePtr p_instance, uint32_t *r_count) { \
if (!p_instance) { \
if (r_count) \
*r_count = 0; \
return nullptr; \
} \
m_class *cls = reinterpret_cast<m_class *>(p_instance); \
::godot::List<::godot::PropertyInfo> &plist_cpp = cls->plist_owned; \
ERR_FAIL_COND_V_MSG(!plist_cpp.is_empty(), nullptr, "Internal error, property list was not freed by engine!"); \
cls->_get_property_list(&plist_cpp); \
return ::godot::internal::create_c_property_list(plist_cpp, r_count); \
} \
\
static void free_property_list_bind(GDExtensionClassInstancePtr p_instance, const GDExtensionPropertyInfo *p_list, uint32_t p_count) { \
if (p_instance) { \
m_class *cls = reinterpret_cast<m_class *>(p_instance); \
cls->plist_owned.clear(); \
::godot::internal::free_c_property_list(const_cast<GDExtensionPropertyInfo *>(p_list)); \
} \
} \
\
static GDExtensionBool property_can_revert_bind(GDExtensionClassInstancePtr p_instance, GDExtensionConstStringNamePtr p_name) { \
if (p_instance && m_class::_get_property_can_revert()) { \
if (m_class::_get_property_can_revert() != m_inherits::_get_property_can_revert()) { \
m_class *cls = reinterpret_cast<m_class *>(p_instance); \
return cls->_property_can_revert(*reinterpret_cast<const ::godot::StringName *>(p_name)); \
} \
return m_inherits::property_can_revert_bind(p_instance, p_name); \
} \
return false; \
} \
\
static GDExtensionBool property_get_revert_bind(GDExtensionClassInstancePtr p_instance, GDExtensionConstStringNamePtr p_name, GDExtensionVariantPtr r_ret) { \
if (p_instance && m_class::_get_property_get_revert()) { \
if (m_class::_get_property_get_revert() != m_inherits::_get_property_get_revert()) { \
m_class *cls = reinterpret_cast<m_class *>(p_instance); \
return cls->_property_get_revert(*reinterpret_cast<const ::godot::StringName *>(p_name), *reinterpret_cast<::godot::Variant *>(r_ret)); \
} \
return m_inherits::property_get_revert_bind(p_instance, p_name, r_ret); \
} \
return false; \
} \
\
static GDExtensionBool validate_property_bind(GDExtensionClassInstancePtr p_instance, GDExtensionPropertyInfo *p_property) { \
bool ret = false; \
if (p_instance && m_class::_get_validate_property()) { \
ret = m_inherits::validate_property_bind(p_instance, p_property); \
if (m_class::_get_validate_property() != m_inherits::_get_validate_property()) { \
m_class *cls = reinterpret_cast<m_class *>(p_instance); \
::godot::PropertyInfo info(p_property); \
cls->_validate_property(info); \
info._update(p_property); \
return true; \
} \
} \
return ret; \
} \
\
static void to_string_bind(GDExtensionClassInstancePtr p_instance, GDExtensionBool *r_is_valid, GDExtensionStringPtr r_out) { \
if (p_instance && m_class::_get_to_string()) { \
if (m_class::_get_to_string() != m_inherits::_get_to_string()) { \
m_class *cls = reinterpret_cast<m_class *>(p_instance); \
*reinterpret_cast<::godot::String *>(r_out) = cls->_to_string(); \
*r_is_valid = true; \
return; \
} \
m_inherits::to_string_bind(p_instance, r_is_valid, r_out); \
} \
} \
\
static void free(void *data, GDExtensionClassInstancePtr ptr) { \
if (ptr) { \
m_class *cls = reinterpret_cast<m_class *>(ptr); \
cls->~m_class(); \
::godot::Memory::free_static(cls); \
} \
} \
\
static void *_gde_binding_create_callback(void *p_token, void *p_instance) { \
return nullptr; \
} \
\
static void _gde_binding_free_callback(void *p_token, void *p_instance, void *p_binding) { \
} \
\
static GDExtensionBool _gde_binding_reference_callback(void *p_token, void *p_instance, GDExtensionBool p_reference) { \
return true; \
} \
\
static constexpr GDExtensionInstanceBindingCallbacks _gde_binding_callbacks = { \
_gde_binding_create_callback, \
_gde_binding_free_callback, \
_gde_binding_reference_callback, \
}; \
\
protected: \
virtual void _notificationv(int32_t p_what, bool p_reversed = false) override { \
m_class::notification_bind(this, p_what, p_reversed); \
} \
\
private:
// Don't use this for your classes, use GDCLASS() instead.
#define GDEXTENSION_CLASS_ALIAS(m_class, m_alias_for, m_inherits) /******************************************************************************************************************/ \
private: \
inline static ::godot::internal::EngineClassRegistration<m_class> _gde_engine_class_registration_helper; \
void operator=(const m_class &p_rval) {} \
friend class ::godot::ClassDB; \
friend class ::godot::Wrapped; \
\
protected: \
m_class(const char *p_godot_class) : m_inherits(p_godot_class) {} \
m_class(GodotObject *p_godot_object) : m_inherits(p_godot_object) {} \
\
static void _bind_methods() {} \
\
static void (*_get_bind_methods())() { \
return nullptr; \
} \
\
static void (Wrapped::*_get_notification())(int) { \
return nullptr; \
} \
\
static bool (Wrapped::*_get_set())(const ::godot::StringName &p_name, const Variant &p_property) { \
return nullptr; \
} \
\
static bool (Wrapped::*_get_get())(const ::godot::StringName &p_name, Variant &r_ret) const { \
return nullptr; \
} \
\
static inline bool has_get_property_list() { \
return false; \
} \
\
static void (Wrapped::*_get_get_property_list())(List<PropertyInfo> * p_list) const { \
return nullptr; \
} \
\
static bool (Wrapped::*_get_property_can_revert())(const ::godot::StringName &p_name) const { \
return nullptr; \
} \
\
static bool (Wrapped::*_get_property_get_revert())(const ::godot::StringName &p_name, Variant &) const { \
return nullptr; \
} \
\
static void (Wrapped::*_get_validate_property())(::godot::PropertyInfo & p_property) const { \
return nullptr; \
} \
\
static String (Wrapped::*_get_to_string())() const { \
return nullptr; \
} \
\
public: \
typedef m_class self_type; \
typedef m_inherits parent_type; \
\
static void initialize_class() {} \
\
static const ::godot::StringName &get_class_static() { \
static const ::godot::StringName string_name = ::godot::StringName(#m_alias_for); \
return string_name; \
} \
\
static const ::godot::StringName &get_parent_class_static() { \
return m_inherits::get_class_static(); \
} \
\
static void free(void *data, GDExtensionClassInstancePtr ptr) { \
} \
\
static void *_gde_binding_create_callback(void *p_token, void *p_instance) { \
/* Do not call memnew here, we don't want the post-initializer to be called */ \
return new ("", "") m_class((GodotObject *)p_instance); \
} \
static void _gde_binding_free_callback(void *p_token, void *p_instance, void *p_binding) { \
/* Explicitly call the deconstructor to ensure proper lifecycle for non-trivial members */ \
reinterpret_cast<m_class *>(p_binding)->~m_class(); \
Memory::free_static(reinterpret_cast<m_class *>(p_binding)); \
} \
static GDExtensionBool _gde_binding_reference_callback(void *p_token, void *p_instance, GDExtensionBool p_reference) { \
return true; \
} \
static constexpr GDExtensionInstanceBindingCallbacks _gde_binding_callbacks = { \
_gde_binding_create_callback, \
_gde_binding_free_callback, \
_gde_binding_reference_callback, \
}; \
m_class() : m_class(#m_alias_for) {} \
\
private:
// Don't use this for your classes, use GDCLASS() instead.
#define GDEXTENSION_CLASS(m_class, m_inherits) GDEXTENSION_CLASS_ALIAS(m_class, m_class, m_inherits)
#define GDVIRTUAL_CALL(m_name, ...) _gdvirtual_##m_name##_call<false>(__VA_ARGS__)
#define GDVIRTUAL_CALL_PTR(m_obj, m_name, ...) m_obj->_gdvirtual_##m_name##_call<false>(__VA_ARGS__)
#define GDVIRTUAL_REQUIRED_CALL(m_name, ...) _gdvirtual_##m_name##_call<true>(__VA_ARGS__)
#define GDVIRTUAL_REQUIRED_CALL_PTR(m_obj, m_name, ...) m_obj->_gdvirtual_##m_name##_call<true>(__VA_ARGS__)
#define GDVIRTUAL_BIND(m_name, ...) ::godot::ClassDB::add_virtual_method(get_class_static(), _gdvirtual_##m_name##_get_method_info(), ::godot::snarray(__VA_ARGS__));
#define GDVIRTUAL_IS_OVERRIDDEN(m_name) _gdvirtual_##m_name##_overridden()
#define GDVIRTUAL_IS_OVERRIDDEN_PTR(m_obj, m_name) m_obj->_gdvirtual_##m_name##_overridden()
#endif // GODOT_WRAPPED_HPP