Connect the various pieces for notifications... hook up NotificationUIManager...

chrome/browser/notifications/notification_ui_manager.cc

+// Copyright (c) 2009 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "chrome/browser/notifications/notification_ui_manager.h"
+
+#include "base/logging.h"
+#include "base/scoped_ptr.h"
+#include "base/stl_util-inl.h"
+#include "chrome/browser/notifications/balloon_collection.h"
+#include "chrome/browser/notifications/notification.h"
+#include "chrome/browser/renderer_host/site_instance.h"
+
+// A class which represents a notification waiting to be shown.
+class QueuedNotification {
+ public:
+  QueuedNotification(const Notification& notification, Profile* profile)
+      : notification_(notification),
+        profile_(profile) {
+  }
+
+  const Notification& notification() const { return notification_; }
+  Profile* profile() const { return profile_; }
+
+ private:
+  // The notification to be shown.
+  Notification notification_;
+
+  // Non owned pointer to the user's profile.
+  Profile* profile_;
+
+  DISALLOW_COPY_AND_ASSIGN(QueuedNotification);
+};
+
+NotificationUIManager::NotificationUIManager()
+    : balloon_collection_(NULL) {
+}
+
+NotificationUIManager::~NotificationUIManager() {
+  STLDeleteElements(&show_queue_);
+}
+
+// static
+NotificationUIManager* NotificationUIManager::Create() {
+  BalloonCollectionImpl* balloons = new BalloonCollectionImpl();
+  NotificationUIManager* instance = new NotificationUIManager();
+  instance->Initialize(balloons);
+  balloons->set_space_change_listener(instance);
+  return instance;
+}
+
+void NotificationUIManager::Add(const Notification& notification,
+                                Profile* profile) {
+  LOG(INFO) << "Added notification. URL: "
+            << notification.content_url().spec().c_str();
+  show_queue_.push_back(
+      new QueuedNotification(notification, profile));
+  CheckAndShowNotifications();
+}
+
+void NotificationUIManager::CheckAndShowNotifications() {
+  // TODO(johnnyg): http://crbug.com/25061 - Check for user idle/presentation.
+  ShowNotifications();
+}
+
+void NotificationUIManager::ShowNotifications() {
+  while (!show_queue_.empty() && balloon_collection_->HasSpace()) {
+    scoped_ptr<QueuedNotification> queued_notification(show_queue_.front());
+    show_queue_.pop_front();
+    balloon_collection_->Add(queued_notification->notification(),
+                             queued_notification->profile());
+  }
+}
+
+void NotificationUIManager::OnBalloonSpaceChanged() {
+  CheckAndShowNotifications();
+}