The Tor Browser: dom/workers/SharedWorker.cpp@b8a032363ba2 (annotated)

dom/workers/SharedWorker.cpp@b8a032363ba2 (annotated)

dom/workers/SharedWorker.cpp

Thu, 22 Jan 2015 13:21:57 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Thu, 22 Jan 2015 13:21:57 +0100
branch: TOR_BUG_9701
changeset 15: b8a032363ba2
permissions: -rw-r--r--

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

 /* -*- Mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; tab-width: 40 -*- */
 /* 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 "SharedWorker.h"
 #include "nsPIDOMWindow.h"
 #include "mozilla/EventDispatcher.h"
 #include "mozilla/Preferences.h"
 #include "mozilla/dom/SharedWorkerBinding.h"
 #include "nsContentUtils.h"
 #include "nsIClassInfoImpl.h"
 #include "nsIDOMEvent.h"
 #include "MessagePort.h"
 #include "RuntimeService.h"
 #include "WorkerPrivate.h"
 using mozilla::dom::Optional;
 using mozilla::dom::Sequence;
 using namespace mozilla;
 USING_WORKERS_NAMESPACE
 SharedWorker::SharedWorker(nsPIDOMWindow* aWindow,
                            WorkerPrivate* aWorkerPrivate)
 : DOMEventTargetHelper(aWindow), mWorkerPrivate(aWorkerPrivate),
   mSuspended(false)
 {
   AssertIsOnMainThread();
   MOZ_ASSERT(aWorkerPrivate);
   mSerial = aWorkerPrivate->NextMessagePortSerial();
   mMessagePort = new MessagePort(aWindow, this, mSerial);
 }
 SharedWorker::~SharedWorker()
 {
   AssertIsOnMainThread();
   Close();
   MOZ_ASSERT(!mWorkerPrivate);
 }
 // static
 already_AddRefed<SharedWorker>
 SharedWorker::Constructor(const GlobalObject& aGlobal, JSContext* aCx,
                           const nsAString& aScriptURL,
                           const mozilla::dom::Optional<nsAString>& aName,
                           ErrorResult& aRv)
 {
   AssertIsOnMainThread();
   RuntimeService* rts = RuntimeService::GetOrCreateService();
   if (!rts) {
     aRv = NS_ERROR_NOT_AVAILABLE;
     return nullptr;
   }
   nsCString name;
   if (aName.WasPassed()) {
     name = NS_ConvertUTF16toUTF8(aName.Value());
   }
   nsRefPtr<SharedWorker> sharedWorker;
   nsresult rv = rts->CreateSharedWorker(aGlobal, aScriptURL, name,
                                         getter_AddRefs(sharedWorker));
   if (NS_FAILED(rv)) {
     aRv = rv;
     return nullptr;
   }
   return sharedWorker.forget();
 }
 already_AddRefed<MessagePort>
 SharedWorker::Port()
 {
   AssertIsOnMainThread();
   nsRefPtr<MessagePort> messagePort = mMessagePort;
   return messagePort.forget();
 }
 void
 SharedWorker::Suspend()
 {
   AssertIsOnMainThread();
   MOZ_ASSERT(!IsSuspended());
   mSuspended = true;
 }
 void
 SharedWorker::Resume()
 {
   AssertIsOnMainThread();
   MOZ_ASSERT(IsSuspended());
   mSuspended = false;
   if (!mSuspendedEvents.IsEmpty()) {
     nsTArray<nsCOMPtr<nsIDOMEvent>> events;
     mSuspendedEvents.SwapElements(events);
     for (uint32_t index = 0; index < events.Length(); index++) {
       nsCOMPtr<nsIDOMEvent>& event = events[index];
       MOZ_ASSERT(event);
       nsCOMPtr<nsIDOMEventTarget> target;
       if (NS_SUCCEEDED(event->GetTarget(getter_AddRefs(target)))) {
         bool ignored;
         if (NS_FAILED(target->DispatchEvent(event, &ignored))) {
           NS_WARNING("Failed to dispatch event!");
         }
       } else {
         NS_WARNING("Failed to get target!");
       }
     }
   }
 }
 void
 SharedWorker::QueueEvent(nsIDOMEvent* aEvent)
 {
   AssertIsOnMainThread();
   MOZ_ASSERT(aEvent);
   MOZ_ASSERT(IsSuspended());
   mSuspendedEvents.AppendElement(aEvent);
 }
 void
 SharedWorker::Close()
 {
   AssertIsOnMainThread();
   if (mMessagePort) {
     mMessagePort->Close();
   }
   if (mWorkerPrivate) {
     AutoSafeJSContext cx;
     NoteDeadWorker(cx);
   }
 }
 void
 SharedWorker::PostMessage(JSContext* aCx, JS::Handle<JS::Value> aMessage,
                           const Optional<Sequence<JS::Value>>& aTransferable,
                           ErrorResult& aRv)
 {
   AssertIsOnMainThread();
   MOZ_ASSERT(mWorkerPrivate);
   MOZ_ASSERT(mMessagePort);
   mWorkerPrivate->PostMessageToMessagePort(aCx, mMessagePort->Serial(),
                                            aMessage, aTransferable, aRv);
 }
 void
 SharedWorker::NoteDeadWorker(JSContext* aCx)
 {
   AssertIsOnMainThread();
   MOZ_ASSERT(mWorkerPrivate);
   mWorkerPrivate->UnregisterSharedWorker(aCx, this);
   mWorkerPrivate = nullptr;
 }
 NS_IMPL_ADDREF_INHERITED(SharedWorker, DOMEventTargetHelper)
 NS_IMPL_RELEASE_INHERITED(SharedWorker, DOMEventTargetHelper)
 NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION_INHERITED(SharedWorker)
 NS_INTERFACE_MAP_END_INHERITING(DOMEventTargetHelper)
 NS_IMPL_CYCLE_COLLECTION_CLASS(SharedWorker)
 NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(SharedWorker,
                                                   DOMEventTargetHelper)
   NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mMessagePort)
   NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mSuspendedEvents)
 NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
 NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(SharedWorker,
                                                 DOMEventTargetHelper)
   tmp->Close();
   NS_IMPL_CYCLE_COLLECTION_UNLINK(mMessagePort)
   NS_IMPL_CYCLE_COLLECTION_UNLINK(mSuspendedEvents)
 NS_IMPL_CYCLE_COLLECTION_UNLINK_END
 JSObject*
 SharedWorker::WrapObject(JSContext* aCx)
 {
   AssertIsOnMainThread();
   return SharedWorkerBinding::Wrap(aCx, this);
 }
 nsresult
 SharedWorker::PreHandleEvent(EventChainPreVisitor& aVisitor)
 {
   AssertIsOnMainThread();
   nsIDOMEvent*& event = aVisitor.mDOMEvent;
   if (IsSuspended() && event) {
     QueueEvent(event);
     aVisitor.mCanHandle = false;
     aVisitor.mParentTarget = nullptr;
     return NS_OK;
   }
   return DOMEventTargetHelper::PreHandleEvent(aVisitor);
 }

The Tor Browser / annotate

dom/workers/SharedWorker.cpp@b8a032363ba2 (annotated)

dom/workers/SharedWorker.cpp