Desktop Notifications UI (for windows)

chrome/browser/notifications/notification_ui_manager_win.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/singleton.h"
+#include "chrome/browser/notifications/notification.h"
+#include "chrome/browser/renderer_host/site_instance.h"
+
+class QueuedNotification {
+ public:
+  QueuedNotification(const Notification& notification,
+                     Profile* profile,
+                     SiteInstance* site_instance)
+      : notification_(notification),
+        profile_(profile),
+        site_instance_(site_instance) {
+  }
+
+  const Notification& notification() const {
+    return notification_;
+  }
+
+  Profile* profile() const {
+    return profile_;
+  }
+
+  SiteInstance* site_instance() const {
+    return site_instance_;
+  }
+
+ private:
+  Notification notification_;
+  Profile* profile_;
+  SiteInstance* site_instance_;
+  DISALLOW_COPY_AND_ASSIGN(QueuedNotification);
+};
+
+void Clear(NotificationDeque* notifications) {
+  while (!notifications->empty()) {
+    NotificationDeque::reverse_iterator it =
+        notifications->rbegin();
+    QueuedNotification* removed = *it;
+    notifications->pop_back();
+    delete removed;
+  }
+}
+
+// static
+NotificationUIManager* NotificationUIManager::Create() {
+  BalloonCollection* collection = new BalloonCollection();
+  NotificationUIManager* instance = new NotificationUIManager();
+  instance->Initialize(collection);
+  collection->AddObserver(instance);
+  return instance;
+}
+
+void NotificationUIManager::Initialize(
+    BalloonCollectionInterface *balloon_collection) {
+  balloon_collection_.reset(balloon_collection);
+}
+
+NotificationUIManager::~NotificationUIManager() {
+  Clear(&show_queue_);
+}
+
+void NotificationUIManager::Add(const Notification& notification,
+                                Profile* profile,
+                                SiteInstance* site_instance) {
+  LOG(INFO) << "Added notification. URL: "
+            << notification.content_url().spec().c_str();
+  show_queue_.push_back(
+      new QueuedNotification(notification, profile, site_instance));
+  CheckAndShowNotifications();
+}
+
+void NotificationUIManager::CheckAndShowNotifications() {
+  // TODO(johnnyg): check for screen-saver / presentation mode
+  ShowNotifications();
+}
+
+void NotificationUIManager::ShowNotifications() {
+  while (!show_queue_.empty() && balloon_collection_->HasSpace()) {
+    QueuedNotification* queued_notification = show_queue_.front();
+    show_queue_.pop_front();
+    balloon_collection_->Add(queued_notification->notification(),
+                             queued_notification->profile(),
+                             queued_notification->site_instance());
+    delete queued_notification;
+  }
+}
+
+void NotificationUIManager::OnBalloonSpaceChanged() {
+  CheckAndShowNotifications();
+  if (balloons_observer_) {
+    balloons_observer_->OnBalloonSpaceChanged();
+  }
+}