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/* -*- mode: C++; c-basic-offset: 4; indent-tabs-mode: nil; -*- */
// SPDX-License-Identifier: MIT OR LGPL-2.0-or-later
// SPDX-FileCopyrightText: 2008 litl, LLC
#include <config.h>
#include <girepository.h>
#include <js/CallArgs.h>
#include <js/Class.h>
#include <js/RootingAPI.h>
#include <js/TypeDecls.h>
#include <js/Utility.h> // for UniqueChars
#include <js/Warnings.h>
#include "gi/arg-inl.h"
#include "gi/function.h"
#include "gi/repo.h"
#include "gi/union.h"
#include "gjs/jsapi-util.h"
#include "gjs/macros.h"
#include "gjs/mem-private.h"
#include "util/log.h"
UnionPrototype::UnionPrototype(GIUnionInfo* info, GType gtype)
: GIWrapperPrototype(info, gtype) {
GJS_INC_COUNTER(union_prototype);
}
UnionPrototype::~UnionPrototype(void) { GJS_DEC_COUNTER(union_prototype); }
UnionInstance::UnionInstance(UnionPrototype* prototype, JS::HandleObject obj)
: GIWrapperInstance(prototype, obj) {
GJS_INC_COUNTER(union_instance);
}
UnionInstance::~UnionInstance(void) {
if (m_ptr) {
g_boxed_free(gtype(), m_ptr);
m_ptr = nullptr;
}
GJS_DEC_COUNTER(union_instance);
}
// See GIWrapperBase::resolve().
bool UnionPrototype::resolve_impl(JSContext* context, JS::HandleObject obj,
JS::HandleId id, bool* resolved) {
JS::UniqueChars prop_name;
if (!gjs_get_string_id(context, id, &prop_name))
return false;
if (!prop_name) {
*resolved = false;
return true; // not resolved, but no error
}
// Look for methods and other class properties
GjsAutoFunctionInfo method_info =
g_union_info_find_method(info(), prop_name.get());
if (method_info) {
#if GJS_VERBOSE_ENABLE_GI_USAGE
_gjs_log_info_usage(method_info);
#endif
if (g_function_info_get_flags (method_info) & GI_FUNCTION_IS_METHOD) {
gjs_debug(GJS_DEBUG_GBOXED,
"Defining method %s in prototype for %s.%s",
method_info.name(), ns(), name());
/* obj is union proto */
if (!gjs_define_function(context, obj, gtype(), method_info))
return false;
*resolved = true; /* we defined the prop in object_proto */
} else {
*resolved = false;
}
} else {
*resolved = false;
}
return true;
}
GJS_JSAPI_RETURN_CONVENTION
static void* union_new(JSContext* context, JS::HandleObject this_obj,
const JS::CallArgs& args, GIUnionInfo* info) {
int n_methods;
int i;
/* Find a zero-args constructor and call it */
n_methods = g_union_info_get_n_methods(info);
for (i = 0; i < n_methods; ++i) {
GIFunctionInfoFlags flags;
GjsAutoFunctionInfo func_info = g_union_info_get_method(info, i);
flags = g_function_info_get_flags(func_info);
if ((flags & GI_FUNCTION_IS_CONSTRUCTOR) != 0 &&
g_callable_info_get_n_args((GICallableInfo*) func_info) == 0) {
GIArgument rval;
if (!gjs_invoke_constructor_from_c(context, func_info, this_obj,
args, &rval))
return nullptr;
if (!gjs_arg_get<void*>(&rval)) {
gjs_throw(context,
"Unable to construct union type %s as its"
"constructor function returned null",
g_base_info_get_name(info));
return nullptr;
}
return gjs_arg_get<void*>(&rval);
}
}
gjs_throw(context, "Unable to construct union type %s since it has no zero-args <constructor>, can only wrap an existing one",
g_base_info_get_name((GIBaseInfo*) info));
return nullptr;
}
// See GIWrapperBase::constructor().
bool UnionInstance::constructor_impl(JSContext* context,
JS::HandleObject object,
const JS::CallArgs& args) {
if (args.length() > 0 &&
!JS::WarnUTF8(context, "Arguments to constructor of %s ignored",
name()))
return false;
m_ptr = union_new(context, object, args, info());
return !!m_ptr;
}
// clang-format off
const struct JSClassOps UnionBase::class_ops = {
nullptr, // addProperty
nullptr, // deleteProperty
nullptr, // enumerate
nullptr, // newEnumerate
&UnionBase::resolve,
nullptr, // mayResolve
&UnionBase::finalize,
};
const struct JSClass UnionBase::klass = {
"GObject_Union",
JSCLASS_HAS_RESERVED_SLOTS(1) | JSCLASS_FOREGROUND_FINALIZE,
&UnionBase::class_ops
};
// clang-format on
bool UnionPrototype::define_class(JSContext* context,
JS::HandleObject in_object,
GIUnionInfo* info) {
GType gtype;
JS::RootedObject prototype(context), constructor(context);
/* For certain unions, we may be able to relax this in the future by
* directly allocating union memory, as we do for structures in boxed.c
*/
gtype = g_registered_type_info_get_g_type( (GIRegisteredTypeInfo*) info);
if (gtype == G_TYPE_NONE) {
gjs_throw(context, "Unions must currently be registered as boxed types");
return false;
}
return !!UnionPrototype::create_class(context, in_object, info, gtype,
&constructor, &prototype);
}
JSObject* UnionInstance::new_for_c_union(JSContext* context, GIUnionInfo* info,
void* gboxed) {
GType gtype;
if (!gboxed)
return nullptr;
/* For certain unions, we may be able to relax this in the future by
* directly allocating union memory, as we do for structures in boxed.c
*/
gtype = g_registered_type_info_get_g_type( (GIRegisteredTypeInfo*) info);
if (gtype == G_TYPE_NONE) {
gjs_throw(context, "Unions must currently be registered as boxed types");
return nullptr;
}
gjs_debug_marshal(GJS_DEBUG_GBOXED,
"Wrapping union %s %p with JSObject",
g_base_info_get_name((GIBaseInfo *)info), gboxed);
JS::RootedObject obj(context,
gjs_new_object_with_generic_prototype(context, info));
if (!obj)
return nullptr;
UnionInstance* priv = UnionInstance::new_for_js_object(context, obj);
priv->copy_union(gboxed);
return obj;
}
void* UnionInstance::copy_ptr(JSContext* cx, GType gtype, void* ptr) {
if (g_type_is_a(gtype, G_TYPE_BOXED))
return g_boxed_copy(gtype, ptr);
gjs_throw(cx,
"Can't transfer ownership of a union type not registered as "
"boxed");
return nullptr;
}
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