components/webusb/webusb_detector.cc

   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 #include "components/webusb/webusb_detector.h"
   6
   7 #include "base/memory/scoped_ptr.h"
   8 #include "components/webusb/webusb_browser_client.h"
   9 #include "device/core/device_client.h"
  10 #include "device/usb/usb_device.h"
  11 #include "device/usb/usb_ids.h"
  12
  13 namespace webusb {
  14
  15 WebUsbDetector::WebUsbDetector(WebUsbBrowserClient* webusb_browser_client)
  16     : webusb_browser_client_(webusb_browser_client), observer_(this) {
  17   Initialize();
  18 }
  19
  20 WebUsbDetector::~WebUsbDetector() {}
  21
  22 void WebUsbDetector::Initialize() {
  23   if (!webusb_browser_client_) {
  24     return;
  25   }
  26
  27   device::UsbService* usb_service =
  28       device::DeviceClient::Get()->GetUsbService();
  29   if (!usb_service)
  30     return;
  31
  32   observer_.Add(usb_service);
  33 }
  34
  35 void WebUsbDetector::OnDeviceAdded(scoped_refptr<device::UsbDevice> device) {
  36   const base::string16& product_name = device->product_string();
  37   if (product_name.empty()) {
  38     return;
  39   }
  40
  41   const GURL& landing_page = device->webusb_landing_page();
  42   if (!landing_page.is_valid()) {
  43     return;
  44   }
  45
  46   std::string notification_id = device->guid();
  47
  48   webusb_browser_client_->OnDeviceAdded(product_name, landing_page,
  49                                         notification_id);
  50 }
  51
  52 void WebUsbDetector::OnDeviceRemoved(scoped_refptr<device::UsbDevice> device) {
  53   std::string notification_id = device->guid();
  54   webusb_browser_client_->OnDeviceRemoved(notification_id);
  55 }
  56
  57 }  // namespace webusb