[CUPS] Implement the Print Job notification.

chrome/browser/chromeos/printing/cups_print_job_notification.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_CHROMEOS_PRINTING_CUPS_PRINT_JOB_NOTIFICATION_H_
+#define CHROME_BROWSER_CHROMEOS_PRINTING_CUPS_PRINT_JOB_NOTIFICATION_H_
+
+#include "chrome/browser/notifications/notification.h"
+#include "chrome/browser/notifications/notification_delegate.h"
+
+class Profile;
+
+namespace chromeos {
+
+class CUPSPrintJob;
+
+// CUPSPrintJobNotification is used to update the notification of a print job
+// according to its state and respond to the user's action.
+class CUPSPrintJobNotification {
+ public:
+  enum ButtonCommand {
+    CANCEL_PRINTING,
+    PAUSE_PRINTING,
+    RESUME_PRINTING,
+    GET_HELP,
+  };
+
+  CUPSPrintJobNotification(CUPSPrintJob* print_job, Profile* profile);
+  ~CUPSPrintJobNotification();
+
+  void OnPrintJobStatusUpdated();
+
+  void CloseNotificationByUser();
+  void ClickOnNotificationButton(int button_index);
+  const std::string& GetNotificationId();
+
+ private:
+  // Update the notification based on the print job's status.
+  void UpdateNotification();
+  void UpdateNotificationTitle();
+  void UpdateNotificationIcon();
+  void UpdateNotificationBodyMessage();
+  void UpdateNotificationType();
+  void UpdateNotificationButtons();
+
+  // Returns the buttons according to the print job's current status.
+  std::unique_ptr<std::vector<ButtonCommand>> GetButtonCommands() const;
+  base::string16 GetButtonLabel(ButtonCommand button) const;
+  gfx::Image GetButtonIcon(ButtonCommand button) const;
+
+  std::unique_ptr<Notification> notification_;
+  std::string notification_id_;
+  CUPSPrintJob* print_job_;
+  scoped_refptr<NotificationDelegate> delegate_;
+  Profile* profile_;
+
+  // If the notification has been closed in the middle of printing or not. If it
+  // is true, then prevent the following print job progress update after close,
+  // and only show the print job done or failed notification.
+  bool closed_in_middle_ = false;
+
+  // Maintains a list of button actions according to the print job's current
+  // status.
+  std::unique_ptr<std::vector<ButtonCommand>> button_commands_;
+
+  DISALLOW_COPY_AND_ASSIGN(CUPSPrintJobNotification);
+};
+
+}  // namespace chromeos
+
+#endif  // CHROME_BROWSER_CHROMEOS_PRINTING_CUPS_PRINT_JOB_NOTIFICATION_H_