/*
 * Deskflow -- 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, deskflow::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();
}

deskflow::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);
}
