Implement notifications for the DisplayBalloon method on Linux and Mac.

BUG=74970
TEST=install background app on window, see desktop notification.

Review URL: http://codereview.chromium.org/8375027

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@107722 0039d316-1c4b-4281-b951-d872f2087c98

2 files changed, 119 insertions, 0 deletions

diff --git a/chrome/browser/status_icons/desktop_notification_balloon.cc b/chrome/browser/status_icons/desktop_notification_balloon.cc
new file mode 100644
index 0000000..4f1777a
--- /dev/null
+++ b/chrome/browser/status_icons/desktop_notification_balloon.cc
@@ -0,0 +1,82 @@
+// Copyright (c) 2011 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/status_icons/desktop_notification_balloon.h"
+
+#include "base/bind.h"
+#include "base/string_number_conversions.h"
+#include "base/threading/thread_restrictions.h"
+#include "chrome/browser/browser_process.h"
+#include "chrome/browser/notifications/desktop_notification_service.h"
+#include "chrome/browser/notifications/notification.h"
+#include "chrome/browser/notifications/notification_delegate.h"
+#include "chrome/browser/notifications/notification_ui_manager.h"
+#include "chrome/browser/profiles/profile_manager.h"
+#include "chrome/browser/ui/webui/web_ui_util.h"
+#include "third_party/skia/include/core/SkBitmap.h"
+
+namespace {
+
+void CloseBalloon(const std::string& id) {
+  g_browser_process->notification_ui_manager()->CancelById(id);
+}
+
+// Prefix added to the notification ids.
+const char kNotificationPrefix[] = "desktop_notification_balloon.";
+
+// Timeout for automatically dismissing the notification balloon.
+const size_t kTimeoutMilliseconds = 6000;
+
+class DummyNotificationDelegate : public NotificationDelegate {
+ public:
+  explicit DummyNotificationDelegate(const std::string& id)
+      : id_(kNotificationPrefix + id) {}
+  virtual ~DummyNotificationDelegate() {}
+
+  virtual void Display() OVERRIDE {
+    MessageLoop::current()->PostDelayedTask(FROM_HERE,
+        base::Bind(&CloseBalloon, id()), kTimeoutMilliseconds);
+  }
+  virtual void Error() OVERRIDE {}
+  virtual void Close(bool by_user) OVERRIDE {}
+  virtual void Click() OVERRIDE {}
+  virtual std::string id() const OVERRIDE { return id_; }
+
+ private:
+  std::string id_;
+};
+
+}  // anonymous namespace
+
+int DesktopNotificationBalloon::id_count_ = 1;
+
+DesktopNotificationBalloon::DesktopNotificationBalloon() {
+}
+
+DesktopNotificationBalloon::~DesktopNotificationBalloon() {
+  if (notification_.get())
+    CloseBalloon(notification_->notification_id());
+}
+
+void DesktopNotificationBalloon::DisplayBalloon(const SkBitmap& icon,
+                                                const string16& title,
+                                                const string16& contents) {
+  GURL icon_url;
+  if (!icon.empty())
+    icon_url = GURL(web_ui_util::GetImageDataUrl(icon));
+
+  GURL content_url(DesktopNotificationService::CreateDataUrl(
+      icon_url, title, contents, WebKit::WebTextDirectionDefault));
+
+  notification_.reset(new Notification(
+      GURL(), content_url, string16(), string16(),
+      new DummyNotificationDelegate(base::IntToString(id_count_++))));
+
+  // Allowing IO access is required here to cover the corner case where
+  // there is no last used profile and the default one is loaded.
+  // IO access won't be required for normal uses.
+  base::ThreadRestrictions::ScopedAllowIO allow_io;
+  g_browser_process->notification_ui_manager()->Add(
+      *notification_.get(), ProfileManager::GetLastUsedProfile());
+}
diff --git a/chrome/browser/status_icons/desktop_notification_balloon.h b/chrome/browser/status_icons/desktop_notification_balloon.h
new file mode 100644
index 0000000..2a44f2b
--- /dev/null
+++ b/chrome/browser/status_icons/desktop_notification_balloon.h
@@ -0,0 +1,37 @@
+// Copyright (c) 2011 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.
+
+#ifndef CHROME_BROWSER_STATUS_ICONS_DESKTOP_NOTIFICATION_BALLOON_H_
+#define CHROME_BROWSER_STATUS_ICONS_DESKTOP_NOTIFICATION_BALLOON_H_
+#pragma once
+
+#include "base/compiler_specific.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/string16.h"
+
+class Notification;
+class SkBitmap;
+
+// Provides the notification balloon functionality by using desktop
+// notifications to platforms that don't have a specific native API.
+class DesktopNotificationBalloon {
+ public:
+  DesktopNotificationBalloon();
+  virtual ~DesktopNotificationBalloon();
+
+  void DisplayBalloon(const SkBitmap& icon,
+                      const string16& title,
+                      const string16& contents);
+
+ private:
+  // Notification balloon.
+  scoped_ptr<Notification> notification_;
+
+  // Counter to provide unique ids to notifications.
+  static int id_count_;
+
+  DISALLOW_COPY_AND_ASSIGN(DesktopNotificationBalloon);
+};
+
+#endif  // CHROME_BROWSER_STATUS_ICONS_DESKTOP_NOTIFICATION_BALLOON_H_