mirror of https://github.com/electron/electron
66 lines
2.1 KiB
C++
66 lines
2.1 KiB
C++
// Copyright (c) 2019 GitHub, Inc.
|
|
// Use of this source code is governed by the MIT license that can be
|
|
// found in the LICENSE file.
|
|
|
|
#include "shell/common/gin_helper/destroyable.h"
|
|
|
|
#include "gin/converter.h"
|
|
#include "shell/common/gin_helper/wrappable_base.h"
|
|
#include "v8/include/v8-function.h"
|
|
|
|
namespace gin_helper {
|
|
|
|
namespace {
|
|
|
|
v8::Eternal<v8::FunctionTemplate> destroy_func_;
|
|
|
|
v8::Eternal<v8::FunctionTemplate> is_destroyed_func_;
|
|
|
|
void DestroyFunc(const v8::FunctionCallbackInfo<v8::Value>& info) {
|
|
v8::Local<v8::Object> holder = info.This();
|
|
if (Destroyable::IsDestroyed(holder))
|
|
return;
|
|
|
|
// TODO(zcbenz): gin_helper::Wrappable will be removed.
|
|
delete static_cast<gin_helper::WrappableBase*>(
|
|
holder->GetAlignedPointerFromInternalField(0));
|
|
holder->SetAlignedPointerInInternalField(0, nullptr);
|
|
}
|
|
|
|
void IsDestroyedFunc(const v8::FunctionCallbackInfo<v8::Value>& info) {
|
|
info.GetReturnValue().Set(gin::ConvertToV8(
|
|
info.GetIsolate(), Destroyable::IsDestroyed(info.This())));
|
|
}
|
|
|
|
} // namespace
|
|
|
|
// static
|
|
bool Destroyable::IsDestroyed(v8::Local<v8::Object> object) {
|
|
// An object is considered destroyed if it has no internal pointer or its
|
|
// internal has been destroyed.
|
|
return object->InternalFieldCount() == 0 ||
|
|
object->GetAlignedPointerFromInternalField(0) == nullptr;
|
|
}
|
|
|
|
// static
|
|
void Destroyable::MakeDestroyable(v8::Isolate* isolate,
|
|
v8::Local<v8::FunctionTemplate> prototype) {
|
|
// Cache the FunctionTemplate of "destroy" and "isDestroyed".
|
|
if (destroy_func_.IsEmpty()) {
|
|
auto templ = v8::FunctionTemplate::New(isolate, DestroyFunc);
|
|
templ->RemovePrototype();
|
|
destroy_func_.Set(isolate, templ);
|
|
templ = v8::FunctionTemplate::New(isolate, IsDestroyedFunc);
|
|
templ->RemovePrototype();
|
|
is_destroyed_func_.Set(isolate, templ);
|
|
}
|
|
|
|
auto proto_templ = prototype->PrototypeTemplate();
|
|
proto_templ->Set(gin::StringToSymbol(isolate, "destroy"),
|
|
destroy_func_.Get(isolate));
|
|
proto_templ->Set(gin::StringToSymbol(isolate, "isDestroyed"),
|
|
is_destroyed_func_.Get(isolate));
|
|
}
|
|
|
|
} // namespace gin_helper
|