chrome/browser/chromeos/printer_detector/printer_detector.h

   1 // Copyright 2015 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CHROME_BROWSER_CHROMEOS_PRINTER_DETECTOR_PRINTER_DETECTOR_H_
   6 #define CHROME_BROWSER_CHROMEOS_PRINTER_DETECTOR_PRINTER_DETECTOR_H_
   7
   8 #include <string>
   9
  10 #include "base/memory/weak_ptr.h"
  11 #include "base/scoped_observer.h"
  12 #include "components/keyed_service/core/keyed_service.h"
  13 #include "device/usb/usb_service.h"
  14
  15 class NotificationUIManager;
  16 class Profile;
  17
  18 namespace device {
  19 class UsbDevice;
  20 }
  21
  22 namespace chromeos {
  23
  24 // Observes device::UsbService for addition of USB printers (devices with
  25 // interface class 7).
  26 // When a printer is detected, a shows a notification depending on whether there
  27 // are printer provider apps that declared support for the USB device installed.
  28 // If such app exists, the notification notifies the user the printer is ready.
  29 // Otherwise the notification offers user to search Chrome Web Store for apps
  30 // that support the printer. Clicking the notification launches webstore_widget
  31 // app for the printer.
  32 // The notification is shown only for active user's profile.
  33 class PrinterDetector : public KeyedService,
  34                         public device::UsbService::Observer {
  35  public:
  36   explicit PrinterDetector(Profile* profile);
  37   ~PrinterDetector() override;
  38
  39  private:
  40   friend class PrinterDetectorAppSearchEnabledTest;
  41
  42   void SetNotificationUIManagerForTesting(NotificationUIManager* manager);
  43
  44   // KeyedService override:
  45   void Shutdown() override;
  46
  47   // UsbService::observer override:
  48   void OnDeviceAdded(scoped_refptr<device::UsbDevice> device) override;
  49
  50   // Initializes the printer detector.
  51   void Initialize();
  52
  53   Profile* profile_;
  54   NotificationUIManager* notification_ui_manager_;
  55   ScopedObserver<device::UsbService, device::UsbService::Observer> observer_;
  56   base::WeakPtrFactory<PrinterDetector> weak_ptr_factory_;
  57
  58   DISALLOW_COPY_AND_ASSIGN(PrinterDetector);
  59 };
  60
  61 }  // namespace chromeos
  62
  63 #endif  // CHROME_BROWSER_CHROMEOS_PRINTER_DETECTOR_PRINTER_DETECTOR_H_