Bug 1197690 - Part2: Implement reconnect, r=smaug

dom/presentation/ControllerConnectionCollection.cpp

@@ -0,0 +1,116 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim:set ts=2 sw=2 sts=2 et cindent: */
+/* 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 "ControllerConnectionCollection.h"
+
+#include "mozilla/ClearOnShutdown.h"
+#include "nsIPresentationService.h"
+#include "PresentationConnection.h"
+
+namespace mozilla {
+namespace dom {
+
+/* static */
+StaticAutoPtr<ControllerConnectionCollection>
+ControllerConnectionCollection::sSingleton;
+
+/* static */ ControllerConnectionCollection*
+ControllerConnectionCollection::GetSingleton()
+{
+  MOZ_ASSERT(NS_IsMainThread());
+
+  if (!sSingleton) {
+    sSingleton = new ControllerConnectionCollection();
+    ClearOnShutdown(&sSingleton);
+  }
+
+  return sSingleton;
+}
+
+ControllerConnectionCollection::ControllerConnectionCollection()
+{
+  MOZ_COUNT_CTOR(ControllerConnectionCollection);
+}
+
+ControllerConnectionCollection::~ControllerConnectionCollection()
+{
+  MOZ_COUNT_DTOR(ControllerConnectionCollection);
+}
+
+void
+ControllerConnectionCollection::AddConnection(
+  PresentationConnection* aConnection,
+  const uint8_t aRole)
+{
+  MOZ_ASSERT(NS_IsMainThread());
+  if (aRole != nsIPresentationService::ROLE_CONTROLLER) {
+    MOZ_ASSERT(false, "This is allowed only to be called at controller side.");
+    return;
+  }
+
+  if (!aConnection) {
+    return;
+  }
+
+  WeakPtr<PresentationConnection> connection = aConnection;
+  if (mConnections.Contains(connection)) {
+    return;
+  }
+
+  mConnections.AppendElement(connection);
+}
+
+void
+ControllerConnectionCollection::RemoveConnection(
+  PresentationConnection* aConnection,
+  const uint8_t aRole)
+{
+  MOZ_ASSERT(NS_IsMainThread());
+  if (aRole != nsIPresentationService::ROLE_CONTROLLER) {
+    MOZ_ASSERT(false, "This is allowed only to be called at controller side.");
+    return;
+  }
+
+  if (!aConnection) {
+    return;
+  }
+
+  WeakPtr<PresentationConnection> connection = aConnection;
+  mConnections.RemoveElement(connection);
+}
+
+already_AddRefed<PresentationConnection>
+ControllerConnectionCollection::FindConnection(
+  uint64_t aWindowId,
+  const nsAString& aId,
+  const uint8_t aRole)
+{
+  MOZ_ASSERT(NS_IsMainThread());
+  if (aRole != nsIPresentationService::ROLE_CONTROLLER) {
+    MOZ_ASSERT(false, "This is allowed only to be called at controller side.");
+    return nullptr;
+  }
+
+  // Loop backwards to allow removing elements in the loop.
+  for (int i = mConnections.Length() - 1; i >= 0; --i) {
+    WeakPtr<PresentationConnection> connection = mConnections[i];
+    if (!connection) {
+      // The connection was destroyed. Remove it from the list.
+      mConnections.RemoveElementAt(i);
+      continue;
+    }
+
+    if (connection->Equals(aWindowId, aId)) {
+      RefPtr<PresentationConnection> matchedConnection = connection.get();
+      return matchedConnection.forget();
+    }
+  }
+
+  return nullptr;
+}
+
+} // namespace dom
+} // namespace mozilla