[Notification] Make HTML5 Notification use ActionCenter on Windows 10, behind Flags.

chrome/browser/notifications/notification_platform_bridge_win.h

+// Copyright 2016 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_NOTIFICATIONS_NOTIFICATION_PLATFORM_BRIDGE_WIN_H_
+#define CHROME_BROWSER_NOTIFICATIONS_NOTIFICATION_PLATFORM_BRIDGE_WIN_H_
+
+#include <windows.ui.notifications.h>
+
+#include <map>
+#include <string>
+
+#include "base/files/file_path.h"
+#include "base/macros.h"
+#include "base/memory/ref_counted.h"
+#include "chrome/browser/notifications/notification_platform_bridge.h"
+
+namespace winui = ABI::Windows::UI;
+
+class Notification;
+struct NotificationToastSession;
+
+// This class is an implementation of NotificationPlatformBridge that will
+// send platform notifications to the Windows Notification Area.
+class NotificationPlatformBridgeWin : public NotificationPlatformBridge {
+ public:
+  // Handler for Notification events from Windows. Special care is needed since
+  // callback may occur at any time, including at shut down! To handle this:
+  // - A static singleton NotificationPlatformBridgeWin::|toast_event_handler_|
+  //   is used throughout. As a result, constructor must be trivial.
+  // - Operations related to NotificationPlatformBridgeWin need to be posted on
+  //   UI thread.
+  class ToastEventHandler {
+   public:
+    enum EventType {
+      EVENT_TYPE_ACTIVATED,
+      EVENT_TYPE_DISMISSED,
+      EVENT_TYPE_FAILED,
+    };
+
+    HRESULT OnActivated(winui::Notifications::IToastNotification* notification,
+                        IInspectable* inspectable);
+
+    HRESULT OnDismissed(winui::Notifications::IToastNotification* notification,
+                        winui::Notifications::IToastDismissedEventArgs* args);
+
+    HRESULT OnFailed(winui::Notifications::IToastNotification* notification,
+                     winui::Notifications::IToastFailedEventArgs* args);
+
+   private:
+    friend NotificationPlatformBridgeWin;
+
+    // Constructor must be trivial.
+    ToastEventHandler() = default;
+
+    static void PostHandlerOnUIThread(EventType type,
+        winui::Notifications::IToastNotification* notification);
+
+    // Runs on the UI thread.
+    static void HandleOnUIThread(EventType type,
+                                 const std::string& notification_id,
+                                 const std::string& profile_id);
+  };
+
+  NotificationPlatformBridgeWin() = default;
+  ~NotificationPlatformBridgeWin() override;
+
+  // NotificationPlatformBridge implementation.
+  void Display(NotificationCommon::Type notification_type,
+               const std::string& notification_id,
+               const std::string& profile_id,
+               bool incognito,
+               const Notification& notification) override;
+  void Close(const std::string& profile_id,
+             const std::string& notification_id) override;
+  void GetDisplayed(const std::string& profile_id,
+                    bool incognito,
+                    const GetDisplayedNotificationsCallback& callback)
+      const override;
+  void SetReadyCallback(NotificationBridgeReadyCallback callback) override;
+
+ private:
+  friend ToastEventHandler;
+
+  // Runs on a worker thread.
+  void DisplayStepFormatIconOnWorkerThread(
+      scoped_refptr<NotificationToastSession> session);
+
+  // Runs on FILE thread.
+  void DisplayStepPrepareIconOnFileThread(
+      scoped_refptr<NotificationToastSession> session);
+
+  // Runs on UI thread. Returns true on success.
+  bool DisplayStepMainWorker(scoped_refptr<NotificationToastSession> session);
+
+  // Runs on UI thread.
+  void DisplayStepMain(scoped_refptr<NotificationToastSession> session);
+
+  // Called when toast notification gets clicked. This might not work on some
+  // regions of the notification toast.
+  void OnClickEvent(const std::string& notification_id,
+                    const std::string& profile_id);
+
+  // Called when toast notification gets closed.
+  void OnCloseEvent(const std::string& notification_id,
+                    const std::string& profile_id);
+
+  // Removes |notification_id| from |session_map_|, cleans up resources used.
+  void CleanupSession(std::string notification_id);
+
+  // Static instance to handle Toast event callback from Windows.
+  static ToastEventHandler toast_event_handler_;
+
+  // Main storage of notification sessions.
+  // TODO(huangs): Also key by |is_incognito| and |profile_id|??
+  std::map<std::string, scoped_refptr<NotificationToastSession>> session_map_;
+
+  DISALLOW_COPY_AND_ASSIGN(NotificationPlatformBridgeWin);
+};
+
+#endif  // CHROME_BROWSER_NOTIFICATIONS_NOTIFICATION_PLATFORM_BRIDGE_WIN_H_