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>
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
 
#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 <private/qglobal_p.h>
 
#include <vector>
#include <memory>
 
namespace QtInputSupport {
 
template <typename Handler>
class DeviceHandlerList {
public:
    struct Device {
    #ifndef __cpp_aggregate_paren_init
        Q_IMPLICIT Device(QString s, std::unique_ptr<Handler> p)
            : deviceNode(std::move(s)), handler(std::move(p)) {}
    #endif
        QString deviceNode;
        std::unique_ptr<Handler> handler;
    };
 
    void add(QString deviceNode, std::unique_ptr<Handler> handler)
    {
        v.emplace_back(std::move(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