input_device_server.cpp

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/* Copyright, 2000-2002 Nevrax Ltd.
 *
 * This file is part of NEVRAX NEL.
 * NEVRAX NEL is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2, or (at your option)
 * any later version.

 * NEVRAX NEL is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * General Public License for more details.

 * You should have received a copy of the GNU General Public License
 * along with NEVRAX NEL; see the file COPYING. If not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
 * MA 02111-1307, USA.
 */

#include "stdmisc.h"
#include "nel/misc/input_device_server.h"
#include "nel/misc/input_device.h"



namespace NLMISC
{
//=======================================================================
void    CInputDeviceServer::registerDevice(IInputDevice *device)
{
    nlassert(!isDevice(device));
    _Devices.push_back(device);
}

//=======================================================================
void    CInputDeviceServer::removeDevice(IInputDevice *device)
{
    TDeviceCont::iterator it = std::find(_Devices.begin(), _Devices.end(), device);
    nlassert(it != _Devices.end());
    _Devices.erase(it);
}

//=======================================================================
bool    CInputDeviceServer::isDevice(IInputDevice *device) const
{
    TDeviceCont::const_iterator it = std::find(_Devices.begin(), _Devices.end(), device);
    return it != _Devices.end();
}

//=======================================================================
// Predicate to compare vents dates
struct CInputDeviceEventLess
{
    bool operator()(const IInputDeviceEvent *lhs, const IInputDeviceEvent *rhs) const
    {
        return *lhs < *rhs;
    }
};

//=======================================================================
void    CInputDeviceServer::poll(CEventServer *server)
{
    nlassert(_Events.empty());
    TDeviceCont::iterator deviceIt;
    for (deviceIt = _Devices.begin(); deviceIt != _Devices.end(); ++deviceIt)
    {
        (*deviceIt)->begin(server);
        (*deviceIt)->poll(this);
    }
    // Sort the messages to get the right dates.
    std::sort(_Events.begin(), _Events.end(), CInputDeviceEventLess());
    // submit the result to the server
    IInputDevice *lastVisitedDevice = NULL;
    TEventCont::iterator eventIt;
    for (eventIt = _Events.begin(); eventIt != _Events.end(); ++eventIt)
    {
        // see if this message is from a previous device then the last we visited.
        if (lastVisitedDevice && (*eventIt)->Emitter != lastVisitedDevice)
        {
            // yes, tells that a transition occured
            lastVisitedDevice->transitionOccured(server, *eventIt);
            lastVisitedDevice = (*eventIt)->Emitter;
        }
        nlassert((*eventIt)->Emitter != NULL);
        (*eventIt)->Emitter->submit(*eventIt, server);
    }
    //
    for (deviceIt = _Devices.begin(); deviceIt != _Devices.end(); ++deviceIt)
    {
        (*deviceIt)->transitionOccured(server, NULL);
    }
    // delete the messages
    for (eventIt = _Events.begin(); eventIt != _Events.end(); ++eventIt)
    {
        delete *eventIt;
    }
    //
    _Events.clear();
}

//=======================================================================
void    CInputDeviceServer::submitEvent(IInputDeviceEvent *deviceEvent)
{
    _Events.push_back(deviceEvent);
}


} // NLMISC