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// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROME_BROWSER_ASH_PRINTING_PRINTER_DETECTOR_H_
#define CHROME_BROWSER_ASH_PRINTING_PRINTER_DETECTOR_H_
#include <vector>
#include "base/functional/callback.h"
#include "chromeos/chromeos_export.h"
#include "chromeos/printing/ppd_provider.h"
#include "chromeos/printing/printer_configuration.h"
namespace ash {
// Interface for automatic printer detection. This API allows for
// incremental discovery of printers and notification when discovery
// is complete.
//
// All of the interface calls in this class must be called from the
// same sequence, but do not have to be on any specific thread.
//
// The usual usage of this interface by a class that wants to maintain
// an up-to-date list of the printers detected is this:
//
// auto detector_ = PrinterDetectorImplementation::Create();
// detector_->RegisterPrintersFoundCallback(cb);
// printers_ = detector_->GetPrinters();
//
class CHROMEOS_EXPORT PrinterDetector {
public:
// The result of a detection.
struct DetectedPrinter {
// Printer information
chromeos::Printer printer;
// Additional metadata used to find a driver.
chromeos::PrinterSearchData ppd_search_data;
};
using OnPrintersFoundCallback = base::RepeatingCallback<void(
const std::vector<DetectedPrinter>& printers)>;
virtual ~PrinterDetector() = default;
virtual void RegisterPrintersFoundCallback(OnPrintersFoundCallback cb) = 0;
// Get the current list of known printers.
virtual std::vector<DetectedPrinter> GetPrinters() = 0;
};
} // namespace ash
#endif // CHROME_BROWSER_ASH_PRINTING_PRINTER_DETECTOR_H_
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