From 5f8de423f190bbb79a62f804151bc24824fa32d8 Mon Sep 17 00:00:00 2001
From: "Matt A. Tobin" <mattatobin@localhost.localdomain>
Date: Fri, 2 Feb 2018 04:16:08 -0500
Subject: Add m-esr52 at 52.6.0

---
 dom/workers/SharedWorker.cpp | 207 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 207 insertions(+)
 create mode 100644 dom/workers/SharedWorker.cpp

(limited to 'dom/workers/SharedWorker.cpp')

diff --git a/dom/workers/SharedWorker.cpp b/dom/workers/SharedWorker.cpp
new file mode 100644
index 000000000..b0eed2def
--- /dev/null
+++ b/dom/workers/SharedWorker.cpp
@@ -0,0 +1,207 @@
+/* -*- 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 "SharedWorker.h"
+
+#include "nsPIDOMWindow.h"
+
+#include "mozilla/EventDispatcher.h"
+#include "mozilla/Preferences.h"
+#include "mozilla/dom/MessagePort.h"
+#include "mozilla/dom/SharedWorkerBinding.h"
+#include "mozilla/Telemetry.h"
+#include "nsContentUtils.h"
+#include "nsIClassInfoImpl.h"
+#include "nsIDOMEvent.h"
+
+#include "RuntimeService.h"
+#include "WorkerPrivate.h"
+
+using mozilla::dom::Optional;
+using mozilla::dom::Sequence;
+using mozilla::dom::MessagePort;
+using namespace mozilla;
+
+USING_WORKERS_NAMESPACE
+
+SharedWorker::SharedWorker(nsPIDOMWindowInner* aWindow,
+                           WorkerPrivate* aWorkerPrivate,
+                           MessagePort* aMessagePort)
+  : DOMEventTargetHelper(aWindow)
+  , mWorkerPrivate(aWorkerPrivate)
+  , mMessagePort(aMessagePort)
+  , mFrozen(false)
+{
+  AssertIsOnMainThread();
+  MOZ_ASSERT(aWorkerPrivate);
+  MOZ_ASSERT(aMessagePort);
+}
+
+SharedWorker::~SharedWorker()
+{
+  AssertIsOnMainThread();
+}
+
+// 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());
+  }
+
+  RefPtr<SharedWorker> sharedWorker;
+  nsresult rv = rts->CreateSharedWorker(aGlobal, aScriptURL, name,
+                                        getter_AddRefs(sharedWorker));
+  if (NS_FAILED(rv)) {
+    aRv = rv;
+    return nullptr;
+  }
+
+  Telemetry::Accumulate(Telemetry::SHARED_WORKER_COUNT, 1);
+
+  return sharedWorker.forget();
+}
+
+MessagePort*
+SharedWorker::Port()
+{
+  AssertIsOnMainThread();
+  return mMessagePort;
+}
+
+void
+SharedWorker::Freeze()
+{
+  AssertIsOnMainThread();
+  MOZ_ASSERT(!IsFrozen());
+
+  mFrozen = true;
+}
+
+void
+SharedWorker::Thaw()
+{
+  AssertIsOnMainThread();
+  MOZ_ASSERT(IsFrozen());
+
+  mFrozen = false;
+
+  if (!mFrozenEvents.IsEmpty()) {
+    nsTArray<nsCOMPtr<nsIDOMEvent>> events;
+    mFrozenEvents.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(IsFrozen());
+
+  mFrozenEvents.AppendElement(aEvent);
+}
+
+void
+SharedWorker::Close()
+{
+  AssertIsOnMainThread();
+
+  if (mMessagePort) {
+    mMessagePort->Close();
+  }
+}
+
+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);
+
+  mMessagePort->PostMessage(aCx, aMessage, aTransferable, aRv);
+}
+
+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(mFrozenEvents)
+NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
+
+NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(SharedWorker,
+                                                DOMEventTargetHelper)
+  NS_IMPL_CYCLE_COLLECTION_UNLINK(mMessagePort)
+  NS_IMPL_CYCLE_COLLECTION_UNLINK(mFrozenEvents)
+NS_IMPL_CYCLE_COLLECTION_UNLINK_END
+
+JSObject*
+SharedWorker::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
+{
+  AssertIsOnMainThread();
+
+  return SharedWorkerBinding::Wrap(aCx, this, aGivenProto);
+}
+
+nsresult
+SharedWorker::PreHandleEvent(EventChainPreVisitor& aVisitor)
+{
+  AssertIsOnMainThread();
+
+  if (IsFrozen()) {
+    nsCOMPtr<nsIDOMEvent> event = aVisitor.mDOMEvent;
+    if (!event) {
+      event = EventDispatcher::CreateEvent(aVisitor.mEvent->mOriginalTarget,
+                                           aVisitor.mPresContext,
+                                           aVisitor.mEvent, EmptyString());
+    }
+
+    QueueEvent(event);
+
+    aVisitor.mCanHandle = false;
+    aVisitor.mParentTarget = nullptr;
+    return NS_OK;
+  }
+
+  return DOMEventTargetHelper::PreHandleEvent(aVisitor);
+}
-- 
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