kmwlpd.cpp

/*
 *  This file is part of the KDE libraries
 *  Copyright (c) 2001 Michael Goffioul <tdeprint@swing.be>
 *
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Library General Public
 *  License version 2 as published by the Free Software Foundation.
 *
 *  This library 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
 *  Library General Public License for more details.
 *
 *  You should have received a copy of the GNU Library General Public License
 *  along with this library; see the file COPYING.LIB.  If not, write to
 *  the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 *  Boston, MA 02110-1301, USA.
 **/
 
#include <config.h>
#include "kmwlpd.h"
#include "kmwizard.h"
#include "kmprinter.h"
 
#include <kurl.h>
#include <tdelocale.h>
#include <tqlabel.h>
#include <kdebug.h>
#include <tqlineedit.h>
#include <tdemessagebox.h>
#include <kextsock.h>
 
static bool checkLpdQueue(const char *host, const char *queue);
 
//********************************************************************************************************
 
KMWLpd::KMWLpd(TQWidget *parent, const char *name)
: KMWInfoBase(2,parent,name)
{
    m_ID = KMWizard::LPD;
    m_title = i18n("LPD Queue Information");
    m_nextpage = KMWizard::Driver;
 
    setInfo(i18n("<p>Enter the information concerning the remote LPD queue; "
             "this wizard will check it before continuing.</p>"));
    setLabel(0,i18n("Host:"));
    setLabel(1,i18n("Queue:"));
}
 
bool KMWLpd::isValid(TQString& msg)
{
    if (text(0).isEmpty() || text(1).isEmpty())
    {
        msg = i18n("Some information is missing.");
        return false;
    }
 
    // check LPD queue
    if (!checkLpdQueue(text(0).latin1(),text(1).latin1()))
    {
        if (KMessageBox::warningContinueCancel(this, i18n("Cannot find queue %1 on server %2; do you want to continue anyway?").arg(text(1)).arg(text(0))) == KMessageBox::Cancel)
            return false;
    }
    return true;
}
 
void KMWLpd::updatePrinter(KMPrinter *p)
{
    TQString    dev = TQString::fromLatin1("lpd://%1/%2").arg(text(0)).arg(text(1));
    p->setDevice(dev);
}
 
//*******************************************************************************************************
 
bool checkLpdQueue(const char *host, const char *queue)
{
    KExtendedSocket sock(host, "printer", KExtendedSocket::streamSocket);
    sock.setBlockingMode(true);
    if (sock.connect() != 0)
        return false;
 
    char    res[64] = {0};
    snprintf(res,64,"%c%s\n",(char)4,queue);
    if (sock.writeBlock(res, strlen(res)) != (TQ_LONG)(strlen(res)))
        return false;
 
    char    buf[1024] = {0};
    int n, tot(1);
    while ((n = sock.readBlock(res, 63)) > 0)
    {
        res[n] = 0;
        tot += n;
        if (tot >= 1024)
            break;
        else
            strcat(buf, res);
    }
    sock.close();
    if (strlen(buf) == 0 || strstr(buf, "unknown printer") != NULL)
        return false;
    return true;
}