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godot-cpp/include/core/Godot.hpp

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#ifndef GODOT_HPP
#define GODOT_HPP
#include <cstdlib>
#include <cstring>
#include <gdnative_api_struct.gen.h>
#include <nativescript/godot_nativescript.h>
#include <core/CoreTypes.hpp>
#include <core/Variant.hpp>
#include <core/Ref.hpp>
#include <Object.hpp>
#include <core/GodotGlobal.hpp>
namespace godot {
template<class T>
class GodotScript {
public:
T *owner;
// GodotScript() {}
void _init() {}
static const char *___get_base_type_name()
{
return T::___get_class_name();
}
static void _register_methods() {}
};
#define GODOT_CLASS(Name) \
public: inline static const char *___get_type_name() { return static_cast<const char *>(#Name); } \
private:
#define GODOT_SUBCLASS(Name, Base) \
public: inline static const char *___get_type_name() { return static_cast<const char *>(#Name); } \
inline static const char *___get_base_type_name() { return static_cast<const char *>(#Base); } \
private:
template<class T>
struct _ArgCast {
static T _arg_cast(Variant a)
{
return a;
}
};
template<class T>
struct _ArgCast<T*> {
static T *_arg_cast(Variant a)
{
return (T *) ((Object *) a);
}
};
template<>
struct _ArgCast<Variant> {
static Variant _arg_cast(Variant a)
{
return a;
}
};
template<class T>
T *as(Object *obj)
{
return (T *) godot::nativescript_api->godot_nativescript_get_userdata(obj);
}
// instance and destroy funcs
template<class T>
void *_godot_class_instance_func(godot_object *p, void *method_data)
{
T *d = new T();
*(godot_object **) &d->owner = p;
d->_init();
return d;
}
template<class T>
void _godot_class_destroy_func(godot_object *p, void *method_data, void *data)
{
T *d = (T *) data;
delete d;
}
template<class T>
void register_class()
{
godot_instance_create_func create = {};
create.create_func = _godot_class_instance_func<T>;
godot_instance_destroy_func destroy = {};
destroy.destroy_func = _godot_class_destroy_func<T>;
godot::nativescript_api->godot_nativescript_register_class(godot::_RegisterState::nativescript_handle, T::___get_type_name(), T::___get_base_type_name(), create, destroy);
T::_register_methods();
}
template<class T>
void register_tool_class()
{
godot_instance_create_func create = {};
create.create_func = _godot_class_instance_func<T>;
godot_instance_destroy_func destroy = {};
destroy.destroy_func = _godot_class_destroy_func<T>;
godot::nativescript_api->godot_nativescript_register_tool_class(godot::_RegisterState::nativescript_handle, T::___get_type_name(), T::___get_base_type_name(), create, destroy);
T::_register_methods();
}
// method registering
typedef godot_variant (*__godot_wrapper_method)(godot_object *, void *, void *, int, godot_variant **);
template<class T, class R, class ...args>
const char *___get_method_class_name(R (T::*p)(args... a))
{
return T::___get_type_name();
}
template<class T, class R, class ...args>
const char *___get_method_class_name(R (T::*p)(args... a) const)
{
return T::___get_type_name();
}
// Okay, time for some template magic.
// Many thanks to manpat from the GDL Discord Server.
// This is stuff that's available in C++14 I think, but whatever.
template<int... I>
struct __Sequence{};
template<int N, int... I>
struct __construct_sequence {
using type = typename __construct_sequence<N-1, N-1, I...>::type;
};
template<int... I>
struct __construct_sequence<0, I...> {
using type = __Sequence<I...>;
};
// Now the wrapping part.
template<class T, class R, class... As>
struct _WrappedMethod {
R (T::*f)(As...);
template<int... I>
void apply(Variant* ret, T* obj, Variant** args, __Sequence<I...>) {
*ret = (obj->*f)( _ArgCast<As>::_arg_cast(*args[I])... );
}
};
template<class T, class... As>
struct _WrappedMethod<T, void, As...> {
void (T::*f)(As...);
template<int... I>
void apply(Variant* ret, T* obj, Variant** args, __Sequence<I...>) {
(obj->*f)( _ArgCast<As>::_arg_cast(*args[I])... );
}
};
template<class T, class R, class... As>
godot_variant __wrapped_method(godot_object *, void *method_data, void *user_data, int num_args, godot_variant **args)
{
godot_variant v;
godot::api->godot_variant_new_nil(&v);
T *obj = (T *) user_data;
_WrappedMethod<T, R, As...> *method = (_WrappedMethod<T, R, As...>*) method_data;
Variant *var = (Variant *) &v;
Variant **arg = (Variant **) args;
method->apply(var, obj, arg, typename __construct_sequence<sizeof...(As)>::type {});
return v;
}
template<class T, class R, class... As>
void *___make_wrapper_function(R (T::*f)(As...))
{
using MethodType = _WrappedMethod<T, R, As...>;
MethodType *p = (MethodType *) godot::api->godot_alloc(sizeof(MethodType));
p->f = f;
return (void *) p;
}
template<class T, class R, class... As>
__godot_wrapper_method ___get_wrapper_function(R (T::*f)(As...))
{
return (__godot_wrapper_method) &__wrapped_method<T, R, As...>;
}
template<class T, class R, class ...A>
void *___make_wrapper_function(R (T::*f)(A...) const)
{
return ___make_wrapper_function((R (T::*)(A...)) f);
}
template<class T, class R, class ...A>
__godot_wrapper_method ___get_wrapper_function(R (T::*f)(A...) const)
{
return ___get_wrapper_function((R (T::*)(A...)) f);
}
template<class M>
void register_method(const char *name, M method_ptr, godot_method_rpc_mode rpc_type = GODOT_METHOD_RPC_MODE_DISABLED)
{
godot_instance_method method = {};
method.method_data = ___make_wrapper_function(method_ptr);
method.free_func = godot::api->godot_free;
method.method = (__godot_wrapper_method) ___get_wrapper_function(method_ptr);
godot_method_attributes attr = {};
attr.rpc_type = rpc_type;
godot::nativescript_api->godot_nativescript_register_method(godot::_RegisterState::nativescript_handle, ___get_method_class_name(method_ptr), name, attr, method);
}
template<class T, class P>
struct _PropertySetFunc {
void (T::*f)(P);
static void _wrapped_setter(godot_object *object, void *method_data, void *user_data, godot_variant *value)
{
_PropertySetFunc<T, P> *set_func = (_PropertySetFunc<T, P> *) method_data;
T *obj = (T *) user_data;
Variant *v = (Variant *) value;
(obj->*(set_func->f))(_ArgCast<P>::_arg_cast(*v));
}
};
template<class T, class P>
struct _PropertyGetFunc {
P (T::*f)();
static godot_variant _wrapped_getter(godot_object *object, void *method_data, void *user_data)
{
_PropertyGetFunc<T, P> *get_func = (_PropertyGetFunc<T, P> *) method_data;
T *obj = (T *) user_data;
godot_variant var;
godot::api->godot_variant_new_nil(&var);
Variant *v = (Variant *) &var;
*v = (obj->*(get_func->f))();
return var;
}
};
template<class T, class P>
struct _PropertyDefaultSetFunc {
P (T::*f);
static void _wrapped_setter(godot_object *object, void *method_data, void *user_data, godot_variant *value)
{
_PropertyDefaultSetFunc<T, P> *set_func = (_PropertyDefaultSetFunc<T, P> *) method_data;
T *obj = (T *) user_data;
Variant *v = (Variant *) value;
(obj->*(set_func->f)) = _ArgCast<P>::_arg_cast(*v);
}
};
template<class T, class P>
struct _PropertyDefaultGetFunc {
P (T::*f);
static godot_variant _wrapped_getter(godot_object *object, void *method_data, void *user_data)
{
_PropertyDefaultGetFunc<T, P> *get_func = (_PropertyDefaultGetFunc<T, P> *) method_data;
T *obj = (T *) user_data;
godot_variant var;
godot::api->godot_variant_new_nil(&var);
Variant *v = (Variant *) &var;
*v = (obj->*(get_func->f));
return var;
}
};
template<class T, class P>
void register_property(const char *name, P (T::*var), P default_value, godot_method_rpc_mode rpc_mode = GODOT_METHOD_RPC_MODE_DISABLED, godot_property_usage_flags usage = GODOT_PROPERTY_USAGE_DEFAULT, godot_property_hint hint = GODOT_PROPERTY_HINT_NONE, String hint_string = "")
{
Variant def_val = default_value;
usage = (godot_property_usage_flags) ((int) usage | GODOT_PROPERTY_USAGE_SCRIPT_VARIABLE);
if (def_val.get_type() == Variant::OBJECT) {
Object *o = def_val;
if (o && o->is_class("Resource")) {
hint = (godot_property_hint) ((int) hint | GODOT_PROPERTY_HINT_RESOURCE_TYPE);
hint_string = o->get_class();
}
}
godot_string *_hint_string = (godot_string*) &hint_string;
godot_property_attributes attr = {};
attr.type = def_val.get_type();
attr.default_value = *(godot_variant *) &def_val;
attr.hint = hint;
attr.rset_type = rpc_mode;
attr.usage = usage;
attr.hint_string = *_hint_string;
_PropertyDefaultSetFunc<T, P> *wrapped_set = (_PropertyDefaultSetFunc<T, P> *)godot::api->godot_alloc(sizeof(_PropertyDefaultSetFunc<T, P>));
wrapped_set->f = var;
_PropertyDefaultGetFunc<T, P> *wrapped_get = (_PropertyDefaultGetFunc<T, P> *) godot::api->godot_alloc(sizeof(_PropertyDefaultGetFunc<T, P>));
wrapped_get->f = var;
godot_property_set_func set_func = {};
set_func.method_data = (void *) wrapped_set;
set_func.free_func = godot::api->godot_free;
set_func.set_func = &_PropertyDefaultSetFunc<T, P>::_wrapped_setter;
godot_property_get_func get_func = {};
get_func.method_data = (void *) wrapped_get;
get_func.free_func = godot::api->godot_free;
get_func.get_func = &_PropertyDefaultGetFunc<T, P>::_wrapped_getter;
godot::nativescript_api->godot_nativescript_register_property(godot::_RegisterState::nativescript_handle, T::___get_type_name(), name, &attr, set_func, get_func);
}
template<class T, class P>
void register_property(const char *name, void (T::*setter)(P), P (T::*getter)(), P default_value, godot_method_rpc_mode rpc_mode = GODOT_METHOD_RPC_MODE_DISABLED, godot_property_usage_flags usage = GODOT_PROPERTY_USAGE_DEFAULT, godot_property_hint hint = GODOT_PROPERTY_HINT_NONE, String hint_string = "")
{
Variant def_val = default_value;
godot_property_attributes attr = {};
attr.type = def_val.get_type();
attr.default_value = *(godot_variant *) &def_val;
attr.hint = hint;
attr.rset_type = rpc_mode;
attr.usage = usage;
_PropertySetFunc<T, P> *wrapped_set = (_PropertySetFunc<T, P> *) godot::api->godot_alloc(sizeof(_PropertySetFunc<T, P>));
wrapped_set->f = setter;
_PropertyGetFunc<T, P> *wrapped_get = (_PropertyGetFunc<T, P> *) godot::api->godot_alloc(sizeof(_PropertyGetFunc<T, P>));
wrapped_get->f = getter;
godot_property_set_func set_func = {};
set_func.method_data = (void *) wrapped_set;
set_func.free_func = godot::api->godot_free;
set_func.set_func = &_PropertySetFunc<T, P>::_wrapped_setter;
godot_property_get_func get_func = {};
get_func.method_data = (void *) wrapped_get;
get_func.free_func = godot::api->godot_free;
get_func.get_func = &_PropertyGetFunc<T, P>::_wrapped_getter;
godot::nativescript_api->godot_nativescript_register_property(godot::_RegisterState::nativescript_handle, T::___get_type_name(), name, &attr, set_func, get_func);
}
template<class T>
void register_signal(String name, Dictionary args = Dictionary())
{
godot_signal signal = {};
signal.name = *(godot_string *)&name;
signal.num_args = args.size();
signal.num_default_args = 0;
signal.args = (godot_signal_argument*) godot::api->godot_alloc(sizeof(godot_signal_argument) * signal.num_args);
memset((void *) signal.args, 0, sizeof(godot_signal_argument) * signal.num_args);
for (int i = 0; i < signal.num_args; i++) {
// Array entry = args[i];
// String name = entry[0];
String name = args.keys()[i];
godot_string *_key = (godot_string *)&name;
godot::api->godot_string_new_copy(&signal.args[i].name, _key);
// if (entry.size() > 1) {
// signal.args[i].type = entry[1];
// }
signal.args[i].type = args.values()[i];
}
godot::nativescript_api->godot_nativescript_register_signal(godot::_RegisterState::nativescript_handle, T::___get_type_name(), &signal);
for (int i = 0; i < signal.num_args; i++) {
godot::api->godot_string_destroy(&signal.args[i].name);
}
godot::api->godot_free(signal.args);
}
}
#endif // GODOT_H
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