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1 // Copyright 2016 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 CHROMEOS_PRINTING_PRINTER_DETECTOR_H_ | |
6 #define CHROMEOS_PRINTING_PRINTER_DETECTOR_H_ | |
7 | |
8 #include <memory> | |
9 #include <vector> | |
10 | |
11 #include "chromeos/printing/printer_configuration.h" | |
12 | |
13 namespace chromeos { | |
14 | |
15 // Interface for printer discovery. Constructs Printer objects from USB and | |
16 // zeroconf (DNS-SD) printers. | |
17 class PrinterDetector { | |
18 public: | |
19 // Interface for objects interested in detected printers. | |
20 class Observer { | |
21 public: | |
22 // Called after discovery has started. | |
23 virtual void OnDiscoveryStarted() = 0; | |
24 | |
25 // Called when discovery is stopping. OnPrintersFound will not be | |
26 // called after this occurs. | |
27 virtual void OnDiscoverStopping() = 0; | |
28 | |
29 // Called with a collection of printers as they are discovered. | |
30 virtual void OnPrintersFound(std::vector<Printer> printers) = 0; | |
31 }; | |
32 | |
33 // Static factory. Caller is responsible for the created object. | |
34 static std::unique_ptr<PrinterDetector> Create(); | |
35 | |
36 // Begin scanning for printers. Found printers will be reported to the | |
37 // attachd observer. | |
xdai1
2016/09/19 18:56:10
nit: attached
skau
2016/09/20 01:56:47
Done.
| |
38 virtual bool StartDiscovery() = 0; | |
39 | |
40 // Stop scanning for printers. Returns true if scanning was stopped | |
41 // successfully. No calls to the attached observer will be made after this | |
42 // returns if it returned true. | |
43 virtual bool StopDiscovery() = 0; | |
44 | |
45 // Set an observer that will be notified of discovered printers. | |
46 virtual void SetObserver(PrinterDetector::Observer* observer) = 0; | |
xdai1
2016/09/19 18:56:10
How about maintaining a list of observers and then
skau
2016/09/20 01:56:47
Done.
| |
47 }; | |
48 | |
49 } // namespace chromeos | |
50 | |
51 #endif // CHROMEOS_PRINTING_PRINTER_DETECTOR_H_ | |
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