зеркало из https://github.com/mozilla/gecko-dev.git
79 строки
2.6 KiB
C++
79 строки
2.6 KiB
C++
|
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
||
|
|
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
|
||
|
|
/* This Source Code Form is subject to the terms of the Mozilla Public
|
||
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
||
|
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
|
||
|
|
|
||
|
|
#include "ChromeWorker.h"
|
||
|
|
|
||
|
|
#include "mozilla/dom/WorkerBinding.h"
|
||
|
|
#include "nsContentUtils.h"
|
||
|
|
#include "WorkerPrivate.h"
|
||
|
|
|
||
|
|
namespace mozilla {
|
||
|
|
namespace dom {
|
||
|
|
|
||
|
|
/* static */ already_AddRefed<ChromeWorker>
|
||
|
|
ChromeWorker::Constructor(const GlobalObject& aGlobal,
|
||
|
|
const nsAString& aScriptURL,
|
||
|
|
ErrorResult& aRv)
|
||
|
|
{
|
||
|
|
JSContext* cx = aGlobal.Context();
|
||
|
|
|
||
|
|
RefPtr<WorkerPrivate> workerPrivate =
|
||
|
|
WorkerPrivate::Constructor(cx, aScriptURL, true /* aIsChromeWorker */,
|
||
|
|
WorkerTypeDedicated, EmptyString(),
|
||
|
|
VoidCString(), nullptr /*aLoadInfo */, aRv);
|
||
|
|
if (NS_WARN_IF(aRv.Failed())) {
|
||
|
|
return nullptr;
|
||
|
|
}
|
||
|
|
|
||
|
|
nsCOMPtr<nsIGlobalObject> globalObject =
|
||
|
|
do_QueryInterface(aGlobal.GetAsSupports());
|
||
|
|
|
||
|
|
RefPtr<ChromeWorker> worker =
|
||
|
|
new ChromeWorker(globalObject, workerPrivate.forget());
|
||
|
|
return worker.forget();
|
||
|
|
}
|
||
|
|
|
||
|
|
/* static */ bool
|
||
|
|
ChromeWorker::WorkerAvailable(JSContext* aCx, JSObject* /* unused */)
|
||
|
|
{
|
||
|
|
// Chrome is always allowed to use workers, and content is never
|
||
|
|
// allowed to use ChromeWorker, so all we have to check is the
|
||
|
|
// caller. However, chrome workers apparently might not have a
|
||
|
|
// system principal, so we have to check for them manually.
|
||
|
|
if (NS_IsMainThread()) {
|
||
|
|
return nsContentUtils::IsSystemCaller(aCx);
|
||
|
|
}
|
||
|
|
|
||
|
|
return GetWorkerPrivateFromContext(aCx)->IsChromeWorker();
|
||
|
|
}
|
||
|
|
|
||
|
|
ChromeWorker::ChromeWorker(nsIGlobalObject* aGlobalObject,
|
||
|
|
already_AddRefed<WorkerPrivate> aWorkerPrivate)
|
||
|
|
: Worker(aGlobalObject, Move(aWorkerPrivate))
|
||
|
|
{}
|
||
|
|
|
||
|
|
ChromeWorker::~ChromeWorker() = default;
|
||
|
|
|
||
|
|
JSObject*
|
||
|
|
ChromeWorker::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
|
||
|
|
{
|
||
|
|
JS::Rooted<JSObject*> wrapper(aCx,
|
||
|
|
ChromeWorkerBinding::Wrap(aCx, this, aGivenProto));
|
||
|
|
if (wrapper) {
|
||
|
|
// Most DOM objects don't assume they have a reflector. If they don't have
|
||
|
|
// one and need one, they create it. But in workers code, we assume that the
|
||
|
|
// reflector is always present. In order to guarantee that it's always
|
||
|
|
// present, we have to preserve it. Otherwise the GC will happily collect it
|
||
|
|
// as needed.
|
||
|
|
MOZ_ALWAYS_TRUE(TryPreserveWrapper(wrapper));
|
||
|
|
}
|
||
|
|
|
||
|
|
return wrapper;
|
||
|
|
}
|
||
|
|
|
||
|
|
} // dom namespace
|
||
|
|
} // mozilla namespace
|