QGIS/helpviewer/qgshelpserver.cpp

/***************************************************************************
                           qgshelpserver.cpp
    Receive help context numbers from client process for help viewer
                             -------------------
    begin                : 2005-07-07
    copyright            : (C) 2005 by Tom Elwertowski
    email                : telwertowski at comcast.net
 ***************************************************************************/

/***************************************************************************
 *                                                                         *
 *   This program 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 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 ***************************************************************************/
/* $Id$ */
#include "qgshelpserver.h"

// The communications technique used here has been adapted from Qt Assistant.
// See qt/tools/assistant/ main.cpp and lib/qassistantclient.cpp (Qt 3.3.4).

QgsHelpContextServer::QgsHelpContextServer(QObject *parent) :
   Q3ServerSocket(0x7f000001, 0, parent)
{
  // Superclass listens for localhost connection
}

QgsHelpContextServer::~QgsHelpContextServer()
{
  // Socket is automatically deleted here because it is a QQbject child
}

void QgsHelpContextServer::newConnection(int socket)
{
  // Create socket in response to new connection
  QgsHelpContextSocket *helpSocket = new QgsHelpContextSocket(socket, this);
  // Pass context from socket upwards
  connect(helpSocket, SIGNAL(setContext(const QString&)),
    SIGNAL(setContext(const QString&)));
}

QgsHelpContextSocket::QgsHelpContextSocket(int socket, QObject *parent) :
  Q3Socket(parent, 0)
{
  connect(this, SIGNAL(readyRead()), SLOT(readClient()));
  setSocket(socket);
}

QgsHelpContextSocket::~QgsHelpContextSocket()
{
}

void QgsHelpContextSocket::readClient()
{
  // Read context numbers (one per line) and pass upwards
  QString contextId;
  while ( canReadLine() )
  {
    contextId = readLine();
    contextId.remove('\n');
    emit setContext(contextId);
  }
}