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wrappedobjectfactory.cpp
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137 lines (111 loc) · 4.04 KB
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/*********************************************************************
* NAN - Native Abstractions for Node.js
*
* Copyright (c) 2018 NAN contributors
*
* MIT License <https://github.com/nodejs/nan/blob/master/LICENSE.md>
********************************************************************/
#include <nan.h>
using namespace Nan; // NOLINT(build/namespaces)
// ref: https://nodejs.org/api/addons.html#addons_factory_of_wrapped_objects
class InnerObject : public ObjectWrap {
public:
static NAN_MODULE_INIT(Init) {
v8::Local<v8::FunctionTemplate> tpl = Nan::New<v8::FunctionTemplate>(New);
tpl->InstanceTemplate()->SetInternalFieldCount(1);
SetPrototypeMethod(tpl, "getValue", GetValue);
constructor().Reset(GetFunction(tpl).ToLocalChecked());
}
static
v8::Local<v8::Object> NewInstance(int argc, v8::Local<v8::Value> argv[]) {
v8::Local<v8::Function> cons = Nan::New(constructor());
return Nan::NewInstance(cons, argc, argv).ToLocalChecked();
}
private:
explicit InnerObject(double value = 0) : value_(value) {}
~InnerObject() {}
static NAN_METHOD(New) {
if (info.IsConstructCall()) {
double value = info[0]->IsNumber() ? To<double>(info[0]).FromJust() : 0;
InnerObject * obj = new InnerObject(value);
obj->Wrap(info.This());
info.GetReturnValue().Set(info.This());
} else {
const int argc = 1;
v8::Local<v8::Value> argv[argc] = {info[0]};
v8::Local<v8::Function> cons = Nan::New(constructor());
info.GetReturnValue().Set(
Nan::NewInstance(cons, argc, argv).ToLocalChecked());
}
}
static NAN_METHOD(GetValue) {
InnerObject* obj = ObjectWrap::Unwrap<InnerObject>(info.Holder());
info.GetReturnValue().Set(obj->value_);
}
static inline Persistent<v8::Function> & constructor() {
static Persistent<v8::Function> my_constructor;
return my_constructor;
}
double value_;
};
class MyObject : public ObjectWrap {
public:
static NAN_MODULE_INIT(Init) {
v8::Local<v8::FunctionTemplate> tpl = Nan::New<v8::FunctionTemplate>(New);
tpl->InstanceTemplate()->SetInternalFieldCount(1);
SetPrototypeMethod(tpl, "getValue", GetValue);
SetPrototypeMethod(tpl, "newInnerObject", NewInnerObject);
constructor().Reset(GetFunction(tpl).ToLocalChecked());
}
static NAN_METHOD(NewInstance) {
v8::Local<v8::Function> cons = Nan::New(constructor());
double value = info[0]->IsNumber() ? To<double>(info[0]).FromJust() : 0;
const int argc = 1;
v8::Local<v8::Value> argv[1] = {Nan::New(value)};
info.GetReturnValue().Set(
Nan::NewInstance(cons, argc, argv).ToLocalChecked());
}
private:
explicit MyObject(double value = 0) : value_(value) {}
~MyObject() {}
static NAN_METHOD(New) {
if (info.IsConstructCall()) {
double value = info[0]->IsNumber() ? To<double>(info[0]).FromJust() : 0;
MyObject * obj = new MyObject(value);
obj->Wrap(info.This());
info.GetReturnValue().Set(info.This());
} else {
const int argc = 1;
v8::Local<v8::Value> argv[argc] = {info[0]};
v8::Local<v8::Function> cons = Nan::New(constructor());
info.GetReturnValue().Set(
Nan::NewInstance(cons, argc, argv).ToLocalChecked());
}
}
static NAN_METHOD(GetValue) {
MyObject* obj = ObjectWrap::Unwrap<MyObject>(info.Holder());
info.GetReturnValue().Set(obj->value_);
}
static NAN_METHOD(NewInnerObject) {
const int argc = 1;
v8::Local<v8::Value> argv[argc] = {info[0]};
info.GetReturnValue().Set(InnerObject::NewInstance(argc, argv));
}
static inline Persistent<v8::Function> & constructor() {
static Persistent<v8::Function> my_constructor;
return my_constructor;
}
double value_;
};
NAN_MODULE_INIT(Init) {
Nan::HandleScope scope;
InnerObject::Init(target);
MyObject::Init(target);
v8::Local<v8::FunctionTemplate> tpl =
New<v8::FunctionTemplate>(MyObject::NewInstance);
Set(target
, New<v8::String>("newFactoryObjectInstance").ToLocalChecked()
, GetFunction(tpl).ToLocalChecked()
);
}
NODE_MODULE(wrappedobjectfactory, Init)