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-rw-r--r--dom/broadcastchannel/BroadcastChannelService.cpp132
1 files changed, 132 insertions, 0 deletions
diff --git a/dom/broadcastchannel/BroadcastChannelService.cpp b/dom/broadcastchannel/BroadcastChannelService.cpp
new file mode 100644
index 000000000..f88108c3a
--- /dev/null
+++ b/dom/broadcastchannel/BroadcastChannelService.cpp
@@ -0,0 +1,132 @@
+/* -*- 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 "BroadcastChannelService.h"
+#include "BroadcastChannelParent.h"
+#include "mozilla/dom/File.h"
+#include "mozilla/dom/ipc/BlobParent.h"
+#include "mozilla/ipc/BackgroundParent.h"
+
+#ifdef XP_WIN
+#undef PostMessage
+#endif
+
+namespace mozilla {
+
+using namespace ipc;
+
+namespace dom {
+
+namespace {
+
+BroadcastChannelService* sInstance = nullptr;
+
+} // namespace
+
+BroadcastChannelService::BroadcastChannelService()
+{
+ AssertIsOnBackgroundThread();
+
+ // sInstance is a raw BroadcastChannelService*.
+ MOZ_ASSERT(!sInstance);
+ sInstance = this;
+}
+
+BroadcastChannelService::~BroadcastChannelService()
+{
+ AssertIsOnBackgroundThread();
+ MOZ_ASSERT(sInstance == this);
+ MOZ_ASSERT(mAgents.Count() == 0);
+
+ sInstance = nullptr;
+}
+
+// static
+already_AddRefed<BroadcastChannelService>
+BroadcastChannelService::GetOrCreate()
+{
+ AssertIsOnBackgroundThread();
+
+ RefPtr<BroadcastChannelService> instance = sInstance;
+ if (!instance) {
+ instance = new BroadcastChannelService();
+ }
+ return instance.forget();
+}
+
+void
+BroadcastChannelService::RegisterActor(BroadcastChannelParent* aParent,
+ const nsAString& aOriginChannelKey)
+{
+ AssertIsOnBackgroundThread();
+ MOZ_ASSERT(aParent);
+
+ nsTArray<BroadcastChannelParent*>* parents;
+ if (!mAgents.Get(aOriginChannelKey, &parents)) {
+ parents = new nsTArray<BroadcastChannelParent*>();
+ mAgents.Put(aOriginChannelKey, parents);
+ }
+
+ MOZ_ASSERT(!parents->Contains(aParent));
+ parents->AppendElement(aParent);
+}
+
+void
+BroadcastChannelService::UnregisterActor(BroadcastChannelParent* aParent,
+ const nsAString& aOriginChannelKey)
+{
+ AssertIsOnBackgroundThread();
+ MOZ_ASSERT(aParent);
+
+ nsTArray<BroadcastChannelParent*>* parents;
+ if (!mAgents.Get(aOriginChannelKey, &parents)) {
+ MOZ_CRASH("Invalid state");
+ }
+
+ parents->RemoveElement(aParent);
+ if (parents->IsEmpty()) {
+ mAgents.Remove(aOriginChannelKey);
+ }
+}
+
+void
+BroadcastChannelService::PostMessage(BroadcastChannelParent* aParent,
+ const ClonedMessageData& aData,
+ const nsAString& aOriginChannelKey)
+{
+ AssertIsOnBackgroundThread();
+ MOZ_ASSERT(aParent);
+
+ nsTArray<BroadcastChannelParent*>* parents;
+ if (!mAgents.Get(aOriginChannelKey, &parents)) {
+ MOZ_CRASH("Invalid state");
+ }
+
+ // We need to keep the array alive for the life-time of this operation.
+ nsTArray<RefPtr<BlobImpl>> blobs;
+ if (!aData.blobsParent().IsEmpty()) {
+ blobs.SetCapacity(aData.blobsParent().Length());
+
+ for (uint32_t i = 0, len = aData.blobsParent().Length(); i < len; ++i) {
+ RefPtr<BlobImpl> impl =
+ static_cast<BlobParent*>(aData.blobsParent()[i])->GetBlobImpl();
+ MOZ_ASSERT(impl);
+ blobs.AppendElement(impl);
+ }
+ }
+
+ for (uint32_t i = 0; i < parents->Length(); ++i) {
+ BroadcastChannelParent* parent = parents->ElementAt(i);
+ MOZ_ASSERT(parent);
+
+ if (parent != aParent) {
+ parent->Deliver(aData);
+ }
+ }
+}
+
+} // namespace dom
+} // namespace mozilla