1 files changed, 85 insertions, 0 deletions
diff --git a/dom/presentation/PresentationTransportBuilderConstructor.cpp b/dom/presentation/PresentationTransportBuilderConstructor.cpp
new file mode 100644
index 000000000..98177958d
--- /dev/null
+++ b/dom/presentation/PresentationTransportBuilderConstructor.cpp
@@ -0,0 +1,85 @@
+/* -*- 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 "PresentationTransportBuilderConstructor.h"
+
+#include "nsComponentManagerUtils.h"
+#include "nsIPresentationControlChannel.h"
+#include "nsIPresentationSessionTransport.h"
+#include "nsXULAppAPI.h"
+
+namespace mozilla {
+namespace dom {
+
+NS_IMPL_ISUPPORTS(DummyPresentationTransportBuilderConstructor,
+                  nsIPresentationTransportBuilderConstructor)
+
+NS_IMETHODIMP
+DummyPresentationTransportBuilderConstructor::CreateTransportBuilder(
+                              uint8_t aType,
+                              nsIPresentationSessionTransportBuilder** aRetval)
+{
+  MOZ_ASSERT(false, "Unexpected to be invoked.");
+  return NS_OK;
+}
+
+NS_IMPL_ISUPPORTS_INHERITED0(PresentationTransportBuilderConstructor,
+                             DummyPresentationTransportBuilderConstructor)
+
+/* static */ already_AddRefed<nsIPresentationTransportBuilderConstructor>
+PresentationTransportBuilderConstructor::Create()
+{
+  nsCOMPtr<nsIPresentationTransportBuilderConstructor> constructor;
+  if (XRE_IsContentProcess()) {
+    constructor = new DummyPresentationTransportBuilderConstructor();
+  } else {
+    constructor = new PresentationTransportBuilderConstructor();
+  }
+
+  return constructor.forget();
+}
+
+NS_IMETHODIMP
+PresentationTransportBuilderConstructor::CreateTransportBuilder(
+                              uint8_t aType,
+                              nsIPresentationSessionTransportBuilder** aRetval)
+{
+  if (NS_WARN_IF(!aRetval)) {
+    return NS_ERROR_INVALID_ARG;
+  }
+
+  *aRetval = nullptr;
+
+  if (NS_WARN_IF(aType != nsIPresentationChannelDescription::TYPE_TCP &&
+                 aType != nsIPresentationChannelDescription::TYPE_DATACHANNEL)) {
+    return NS_ERROR_INVALID_ARG;
+  }
+
+  if (XRE_IsContentProcess()) {
+    MOZ_ASSERT(false,
+               "CreateTransportBuilder can only be invoked in parent process.");
+    return NS_ERROR_FAILURE;
+  }
+
+  nsCOMPtr<nsIPresentationSessionTransportBuilder> builder;
+  if (aType == nsIPresentationChannelDescription::TYPE_TCP) {
+    builder =
+      do_CreateInstance(PRESENTATION_TCP_SESSION_TRANSPORT_CONTRACTID);
+  } else {
+    builder =
+      do_CreateInstance("@mozilla.org/presentation/datachanneltransportbuilder;1");
+  }
+
+  if (NS_WARN_IF(!builder)) {
+    return NS_ERROR_DOM_OPERATION_ERR;
+  }
+
+  builder.forget(aRetval);
+  return NS_OK;
+}
+
+} // namespace dom
+} // namespace mozilla