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-rw-r--r--dom/broadcastchannel/BroadcastChannelChild.cpp135
1 files changed, 135 insertions, 0 deletions
diff --git a/dom/broadcastchannel/BroadcastChannelChild.cpp b/dom/broadcastchannel/BroadcastChannelChild.cpp
new file mode 100644
index 000000000..98bd21999
--- /dev/null
+++ b/dom/broadcastchannel/BroadcastChannelChild.cpp
@@ -0,0 +1,135 @@
+/* -*- 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 "BroadcastChannelChild.h"
+#include "BroadcastChannel.h"
+#include "jsapi.h"
+#include "mozilla/dom/ipc/BlobChild.h"
+#include "mozilla/dom/File.h"
+#include "mozilla/dom/MessageEvent.h"
+#include "mozilla/dom/MessageEventBinding.h"
+#include "mozilla/dom/WorkerPrivate.h"
+#include "mozilla/dom/WorkerScope.h"
+#include "mozilla/dom/ScriptSettings.h"
+#include "mozilla/ipc/PBackgroundChild.h"
+#include "mozilla/dom/ipc/StructuredCloneData.h"
+#include "WorkerPrivate.h"
+
+namespace mozilla {
+
+using namespace ipc;
+
+namespace dom {
+
+using namespace workers;
+
+BroadcastChannelChild::BroadcastChannelChild(const nsACString& aOrigin)
+ : mBC(nullptr)
+ , mActorDestroyed(false)
+{
+ CopyUTF8toUTF16(aOrigin, mOrigin);
+}
+
+BroadcastChannelChild::~BroadcastChannelChild()
+{
+ MOZ_ASSERT(!mBC);
+}
+
+bool
+BroadcastChannelChild::RecvNotify(const ClonedMessageData& aData)
+{
+ // Make sure to retrieve all blobs from the message before returning to avoid
+ // leaking their actors.
+ nsTArray<RefPtr<BlobImpl>> blobs;
+ if (!aData.blobsChild().IsEmpty()) {
+ blobs.SetCapacity(aData.blobsChild().Length());
+
+ for (uint32_t i = 0, len = aData.blobsChild().Length(); i < len; ++i) {
+ RefPtr<BlobImpl> impl =
+ static_cast<BlobChild*>(aData.blobsChild()[i])->GetBlobImpl();
+
+ blobs.AppendElement(impl);
+ }
+ }
+
+ nsCOMPtr<DOMEventTargetHelper> helper = mBC;
+ nsCOMPtr<EventTarget> eventTarget = do_QueryInterface(helper);
+
+ // The object is going to be deleted soon. No notify is required.
+ if (!eventTarget) {
+ return true;
+ }
+
+ // CheckInnerWindowCorrectness can be used also without a window when
+ // BroadcastChannel is running in a worker. In this case, it's a NOP.
+ if (NS_FAILED(mBC->CheckInnerWindowCorrectness())) {
+ return true;
+ }
+
+ mBC->RemoveDocFromBFCache();
+
+ AutoJSAPI jsapi;
+ nsCOMPtr<nsIGlobalObject> globalObject;
+
+ if (NS_IsMainThread()) {
+ globalObject = do_QueryInterface(mBC->GetParentObject());
+ } else {
+ WorkerPrivate* workerPrivate = GetCurrentThreadWorkerPrivate();
+ MOZ_ASSERT(workerPrivate);
+ globalObject = workerPrivate->GlobalScope();
+ }
+
+ if (!globalObject || !jsapi.Init(globalObject)) {
+ NS_WARNING("Failed to initialize AutoJSAPI object.");
+ return true;
+ }
+
+ ipc::StructuredCloneData cloneData;
+ cloneData.BlobImpls().AppendElements(blobs);
+
+ const SerializedStructuredCloneBuffer& buffer = aData.data();
+ JSContext* cx = jsapi.cx();
+ JS::Rooted<JS::Value> value(cx, JS::NullValue());
+ if (buffer.data.Size()) {
+ ErrorResult rv;
+ cloneData.UseExternalData(buffer.data);
+ cloneData.Read(cx, &value, rv);
+ if (NS_WARN_IF(rv.Failed())) {
+ rv.SuppressException();
+ return true;
+ }
+ }
+
+ RootedDictionary<MessageEventInit> init(cx);
+ init.mBubbles = false;
+ init.mCancelable = false;
+ init.mOrigin = mOrigin;
+ init.mData = value;
+
+ ErrorResult rv;
+ RefPtr<MessageEvent> event =
+ MessageEvent::Constructor(mBC, NS_LITERAL_STRING("message"), init, rv);
+ if (NS_WARN_IF(rv.Failed())) {
+ rv.SuppressException();
+ return true;
+ }
+
+ event->SetTrusted(true);
+
+ bool status;
+ mBC->DispatchEvent(static_cast<Event*>(event.get()), &status);
+
+ return true;
+}
+
+void
+BroadcastChannelChild::ActorDestroy(ActorDestroyReason aWhy)
+{
+ mActorDestroyed = true;
+}
+
+} // namespace dom
+} // namespace mozilla