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Remove the need to use GODOT_SUBCLASS

pull/454/head
Marc Gilleron 2020-09-12 17:38:46 +01:00
parent c9a740be34
commit 67976ee47d
2 changed files with 100 additions and 65 deletions
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9
binding_generator.py
View File

@ -178,8 +178,11 @@ def generate_class_header(used_classes, c, use_template_get_node):
# godot::api->godot_global_get_singleton((char *) \"" + strip_name(c["name"]) + "\");"
# ___get_class_name
# class name:
# Two versions needed needed because when the user implements a custom class,
# we want to override `___get_class_name` while `___get_godot_class_name` can keep returning the base name
source.append("\tstatic inline const char *___get_class_name() { return (const char *) \"" + strip_name(c["name"]) + "\"; }")
source.append("\tstatic inline const char *___get_godot_class_name() { return (const char *) \"" + strip_name(c["name"]) + "\"; }")
source.append("\tstatic inline Object *___get_from_variant(Variant a) { godot_object *o = (godot_object*) a; return (o) ? (Object *) godot::nativescript_1_1_api->godot_nativescript_get_instance_binding_data(godot::_RegisterState::language_index, o) : nullptr; }")
@ -443,7 +446,7 @@ def generate_class_implementation(icalls, used_classes, c, use_template_get_node
if is_enum(method["return_type"]):
return_statement += "return (" + remove_enum_prefix(method["return_type"]) + ") "
elif return_type_is_ref:
return_statement += "return Ref<" + strip_name(method["return_type"]) + ">::__internal_constructor(";
return_statement += "return Ref<" + strip_name(method["return_type"]) + ">::__internal_constructor("
else:
return_statement += "return " + ("(" + strip_name(method["return_type"]) + " *) " if is_class_type(method["return_type"]) else "")
else:
@ -716,8 +719,6 @@ def generate_init_method_bindings(classes):
source.append("{")
for c in classes:
class_name = strip_name(c["name"])
source.append("\t" + strip_name(c["name"]) + "::___init_method_bindings();")
source.append("}")

126
include/core/Godot.hpp
View File

@ -46,7 +46,9 @@ inline T *create_custom_class_instance() {
// We cannot use wrappers because of https://github.com/godotengine/godot/issues/39181
// godot::NativeScript *script = godot::NativeScript::_new();
// script->set_library(get_wrapper<godot::GDNativeLibrary>((godot_object *)godot::gdnlib));
// script->set_class_name(T::___get_type_name());
// script->set_class_name(T::___get_class_name());
static_assert(T::___CLASS_IS_SCRIPT, "This function must only be used on custom classes");
// So we use the C API directly.
static godot_class_constructor script_constructor = godot::api->godot_get_class_constructor("NativeScript");
@ -58,7 +60,7 @@ inline T *create_custom_class_instance() {
godot::api->godot_method_bind_ptrcall(mb_set_library, script, args, nullptr);
}
{
const String class_name = T::___get_type_name();
const String class_name = T::___get_class_name();
const void *args[] = { &class_name };
godot::api->godot_method_bind_ptrcall(mb_set_class_name, script, args, nullptr);
}
@ -74,7 +76,7 @@ inline T *create_custom_class_instance() {
// return get_custom_class_instance<T>(base_obj);
// Again using the C API to do exactly what we have to do.
static godot_class_constructor base_constructor = godot::api->godot_get_class_constructor(T::___get_godot_base_class_name());
static godot_class_constructor base_constructor = godot::api->godot_get_class_constructor(T::___get_godot_class_name());
static godot_method_bind *mb_set_script = godot::api->godot_method_bind_get_method("Object", "set_script");
godot_object *base_obj = base_constructor();
{
@ -87,21 +89,32 @@ inline T *create_custom_class_instance() {
} // namespace detail
// Used in the definition of a custom class where the base is a Godot class
// Used in the definition of a custom class.
//
// Name: Name of your class, without namespace
// Base: Name of the direct base class, with namespace if necessary
//
// ___get_class_name: Name of the class
// ___get_godot_class_name: Name of the Godot base class this class inherits from (i.e not direct)
// _new: Creates a new instance of the class
// ___get_id: Gets the unique ID of the class. Godot and custom classes are both within that set.
// ___get_base_id: Gets the ID of the direct base class, as returned by ___get_id
// ___get_base_class_name: Name of the direct base class
// ___get_from_variant: Converts a Variant into an Object*. Will be non-null if the class matches.
#define GODOT_CLASS(Name, Base) \
\
public: \
inline static const char *___get_type_name() { return #Name; } \
inline static const char *___get_class_name() { return #Name; } \
enum { ___CLASS_IS_SCRIPT = 1 }; \
inline static const char *___get_godot_base_class_name() { \
return Base::___get_class_name(); \
inline static const char *___get_godot_class_name() { \
return Base::___get_godot_class_name(); \
} \
inline static Name *_new() { \
return godot::detail::create_custom_class_instance<Name>(); \
} \
inline static size_t ___get_id() { return typeid(Name).hash_code(); } \
inline static size_t ___get_base_id() { return Base::___get_id(); } \
inline static const char *___get_base_type_name() { return Base::___get_class_name(); } \
inline static const char *___get_base_class_name() { return Base::___get_class_name(); } \
inline static godot::Object *___get_from_variant(godot::Variant a) { \
return (godot::Object *)godot::detail::get_custom_class_instance<Name>( \
godot::Object::___get_from_variant(a)); \
@ -109,27 +122,8 @@ public:
\
private:
// Used in the definition of a custom class where the base is another custom class
#define GODOT_SUBCLASS(Name, Base) \
\
public: \
inline static const char *___get_type_name() { return #Name; } \
enum { ___CLASS_IS_SCRIPT = 1 }; \
inline static const char *___get_godot_base_class_name() { \
return Base::___get_godot_base_class_name(); \
} \
inline static Name *_new() { \
return godot::detail::create_custom_class_instance<Name>(); \
} \
inline static size_t ___get_id() { return typeid(Name).hash_code(); }; \
inline static size_t ___get_base_id() { return typeid(Base).hash_code(); }; \
inline static const char *___get_base_type_name() { return Base::___get_type_name(); } \
inline static godot::Object *___get_from_variant(godot::Variant a) { \
return (godot::Object *)godot::detail::get_custom_class_instance<Name>( \
godot::Object::___get_from_variant(a)); \
} \
\
private:
// Legacy compatibility
#define GODOT_SUBCLASS(Name, Base) GODOT_CLASS(Name, Base)
template <class T>
struct _ArgCast {
@ -171,6 +165,8 @@ void _godot_class_destroy_func(godot_object *p, void *method_data, void *data) {
template <class T>
void register_class() {
static_assert(T::___CLASS_IS_SCRIPT, "This function must only be used on custom classes");
godot_instance_create_func create = {};
create.create_func = _godot_class_instance_func<T>;
@ -179,13 +175,19 @@ void register_class() {
_TagDB::register_type(T::___get_id(), T::___get_base_id());
godot::nativescript_api->godot_nativescript_register_class(godot::_RegisterState::nativescript_handle, T::___get_type_name(), T::___get_base_type_name(), create, destroy);
godot::nativescript_1_1_api->godot_nativescript_set_type_tag(godot::_RegisterState::nativescript_handle, T::___get_type_name(), (const void *)typeid(T).hash_code());
godot::nativescript_api->godot_nativescript_register_class(godot::_RegisterState::nativescript_handle,
T::___get_class_name(), T::___get_base_class_name(), create, destroy);
godot::nativescript_1_1_api->godot_nativescript_set_type_tag(godot::_RegisterState::nativescript_handle,
T::___get_class_name(), (const void *)T::___get_id());
T::_register_methods();
}
template <class T>
void register_tool_class() {
static_assert(T::___CLASS_IS_SCRIPT, "This function must only be used on custom classes");
godot_instance_create_func create = {};
create.create_func = _godot_class_instance_func<T>;
@ -194,8 +196,12 @@ void register_tool_class() {
_TagDB::register_type(T::___get_id(), T::___get_base_id());
godot::nativescript_api->godot_nativescript_register_tool_class(godot::_RegisterState::nativescript_handle, T::___get_type_name(), T::___get_base_type_name(), create, destroy);
godot::nativescript_1_1_api->godot_nativescript_set_type_tag(godot::_RegisterState::nativescript_handle, T::___get_type_name(), (const void *)typeid(T).hash_code());
godot::nativescript_api->godot_nativescript_register_tool_class(godot::_RegisterState::nativescript_handle,
T::___get_class_name(), T::___get_base_class_name(), create, destroy);
godot::nativescript_1_1_api->godot_nativescript_set_type_tag(godot::_RegisterState::nativescript_handle,
T::___get_class_name(), (const void *)T::___get_id());
T::_register_methods();
}
@ -205,12 +211,14 @@ typedef godot_variant (*__godot_wrapper_method)(godot_object *, void *, void *,
template <class T, class R, class... args>
const char *___get_method_class_name(R (T::*p)(args... a)) {
return T::___get_type_name();
static_assert(T::___CLASS_IS_SCRIPT, "This function must only be used on custom classes");
return T::___get_class_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();
static_assert(T::___CLASS_IS_SCRIPT, "This function must only be used on custom classes");
return T::___get_class_name();
}
// Okay, time for some template magic.
@ -302,12 +310,15 @@ void register_method(const char *name, M method_ptr, godot_method_rpc_mode rpc_t
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);
godot::nativescript_api->godot_nativescript_register_method(godot::_RegisterState::nativescript_handle,
___get_method_class_name(method_ptr), name, attr, method);
}
// User can specify a derived class D to register the method for, instead of it being inferred.
template <class D, class B, class R, class... As>
void register_method_explicit(const char *name, R (B::*method_ptr)(As...), godot_method_rpc_mode rpc_type = GODOT_METHOD_RPC_MODE_DISABLED) {
void register_method_explicit(const char *name, R (B::*method_ptr)(As...),
godot_method_rpc_mode rpc_type = GODOT_METHOD_RPC_MODE_DISABLED) {
static_assert(std::is_base_of<B, D>::value, "Explicit class must derive from method class");
register_method(name, static_cast<R (D::*)(As...)>(method_ptr), rpc_type);
}
@ -376,7 +387,13 @@ struct _PropertyDefaultGetFunc {
};
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 = "") {
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 = "") {
static_assert(T::___CLASS_IS_SCRIPT, "This function must only be used on custom classes");
Variant def_val = default_value;
usage = (godot_property_usage_flags)((int)usage | GODOT_PROPERTY_USAGE_SCRIPT_VARIABLE);
@ -404,10 +421,12 @@ void register_property(const char *name, P(T::*var), P default_value, godot_meth
attr.usage = usage;
attr.hint_string = *_hint_string;
_PropertyDefaultSetFunc<T, P> *wrapped_set = (_PropertyDefaultSetFunc<T, P> *)godot::api->godot_alloc(sizeof(_PropertyDefaultSetFunc<T, P>));
_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>));
_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 = {};
@ -420,11 +439,18 @@ void register_property(const char *name, P(T::*var), P default_value, godot_meth
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);
godot::nativescript_api->godot_nativescript_register_property(godot::_RegisterState::nativescript_handle,
T::___get_class_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 = "") {
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 = "") {
static_assert(T::___CLASS_IS_SCRIPT, "This function must only be used on custom classes");
Variant def_val = default_value;
godot_string *_hint_string = (godot_string *)&hint_string;
@ -457,16 +483,23 @@ void register_property(const char *name, void (T::*setter)(P), P (T::*getter)(),
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);
godot::nativescript_api->godot_nativescript_register_property(godot::_RegisterState::nativescript_handle,
T::___get_class_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)() const, 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 = "") {
void register_property(const char *name, void (T::*setter)(P), P (T::*getter)() const, 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 = "") {
register_property(name, setter, (P(T::*)())getter, default_value, rpc_mode, usage, hint, hint_string);
}
template <class T>
void register_signal(String name, Dictionary args = Dictionary()) {
static_assert(T::___CLASS_IS_SCRIPT, "This function must only be used on custom classes");
godot_signal signal = {};
signal.name = *(godot_string *)&name;
signal.num_args = args.size();
@ -491,7 +524,8 @@ void register_signal(String name, Dictionary args = Dictionary()) {
signal.args[i].type = args.values()[i];
}
godot::nativescript_api->godot_nativescript_register_signal(godot::_RegisterState::nativescript_handle, T::___get_type_name(), &signal);
godot::nativescript_api->godot_nativescript_register_signal(godot::_RegisterState::nativescript_handle,
T::___get_class_name(), &signal);
for (int i = 0; i < signal.num_args; i++) {
godot::api->godot_string_destroy(&signal.args[i].name);
@ -540,4 +574,4 @@ T *Object::cast_to(const Object *obj) {
} // namespace godot
#endif // GODOT_H
#endif // GODOT_HPP