/*
 * barrier -- mouse and keyboard sharing utility
 * Copyright (C) 2012-2016 Symless Ltd.
 * Copyright (C) 2004 Chris Schoeneman
 *
 * This package is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * found in the file LICENSE that should have accompanied this file.
 *
 * This package 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 this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include "io/StreamFilter.h"
#include "base/IEventQueue.h"
#include "base/TMethodEventJob.h"

//
// StreamFilter
//

StreamFilter::StreamFilter(IEventQueue* events, barrier::IStream* stream, bool adoptStream) :
    m_stream(stream),
    m_adopted(adoptStream),
    m_events(events)
{
    // replace handlers for m_stream
    m_events->removeHandlers(m_stream->getEventTarget());
    m_events->adoptHandler(Event::kUnknown, m_stream->getEventTarget(),
                            new TMethodEventJob<StreamFilter>(this,
                                &StreamFilter::handleUpstreamEvent));
}

StreamFilter::~StreamFilter()
{
    m_events->removeHandler(Event::kUnknown, m_stream->getEventTarget());
    if (m_adopted) {
        delete m_stream;
    }
}

void
StreamFilter::close()
{
    getStream()->close();
}

UInt32
StreamFilter::read(void* buffer, UInt32 n)
{
    return getStream()->read(buffer, n);
}

void
StreamFilter::write(const void* buffer, UInt32 n)
{
    getStream()->write(buffer, n);
}

void
StreamFilter::flush()
{
    getStream()->flush();
}

void
StreamFilter::shutdownInput()
{
    getStream()->shutdownInput();
}

void
StreamFilter::shutdownOutput()
{
    getStream()->shutdownOutput();
}

void*
StreamFilter::getEventTarget() const
{
    return const_cast<void*>(static_cast<const void*>(this));
}

bool
StreamFilter::isReady() const
{
    return getStream()->isReady();
}

UInt32
StreamFilter::getSize() const
{
    return getStream()->getSize();
}

barrier::IStream*
StreamFilter::getStream() const
{
    return m_stream;
}

void
StreamFilter::filterEvent(const Event& event)
{
    m_events->dispatchEvent(Event(event.getType(),
                        getEventTarget(), event.getData()));
}

void
StreamFilter::handleUpstreamEvent(const Event& event, void*)
{
    filterEvent(event);
}
