qt-everywhere-src-5.14.1/qtbase/src/platformsupport/input/shared/devicehandlerlist_p.h

/****************************************************************************
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** Copyright (C) 2019 Klarälvdalens Datakonsult AB, a KDAB Group company, info@kdab.com, author Marc Mutz <marc.mutz@kdab.com>
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#ifndef QTINPUTSUPPORT_DEVICEHANDLERLIST_P_H
#define QTINPUTSUPPORT_DEVICEHANDLERLIST_P_H

//
//  W A R N I N G
//  -------------
//
// This file is not part of the Qt API.  It exists purely as an
// implementation detail.  This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//

#include <QString>

#include <vector>
#include <memory>

namespace QtInputSupport {

template <typename Handler>
class DeviceHandlerList {
public:
    struct Device {
        QString deviceNode;
        std::unique_ptr<Handler> handler;
    };

    void add(const QString &deviceNode, std::unique_ptr<Handler> handler)
    {
        v.push_back({deviceNode, std::move(handler)});
    }

    bool remove(const QString &deviceNode)
    {
        const auto deviceNodeMatches = [&] (const Device &d) { return d.deviceNode == deviceNode; };
        const auto it = std::find_if(v.cbegin(), v.cend(), deviceNodeMatches);
        if (it == v.cend())
            return false;
        v.erase(it);
        return true;
    }

    int count() const noexcept { return static_cast<int>(v.size()); }

    typename std::vector<Device>::const_iterator begin() const noexcept { return v.begin(); }
    typename std::vector<Device>::const_iterator end() const  noexcept { return v.end(); }

private:
    std::vector<Device> v;
};

} // QtInputSupport

#endif // QTINPUTSUPPORT_DEVICEHANDLERLIST_P_H