Implement notifications for the DisplayBalloon method on Linux and Mac.

chrome/browser/status_icons/desktop_notification_balloon.cc

+// 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());
+}