kmdbcreator.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 "kmdbcreator.h"
#include "kmfactory.h"
#include "kmmanager.h"
 
#include <tqprogressdialog.h>
#include <tqfileinfo.h>
#include <tqdir.h>
#include <tdelocale.h>
#include <tdeapplication.h>
#include <kstandarddirs.h>
#include <kdebug.h>
 
KMDBCreator::KMDBCreator(TQObject *parent, const char *name)
: TQObject(parent,name)
{
    m_dlg = 0;
    m_status = true;
 
    connect(&m_proc,TQ_SIGNAL(receivedStdout(TDEProcess*,char*,int)),TQ_SLOT(slotReceivedStdout(TDEProcess*,char*,int)));
    connect(&m_proc,TQ_SIGNAL(receivedStderr(TDEProcess*,char*,int)),TQ_SLOT(slotReceivedStderr(TDEProcess*,char*,int)));
    connect(&m_proc,TQ_SIGNAL(processExited(TDEProcess*)),TQ_SLOT(slotProcessExited(TDEProcess*)));
}
 
KMDBCreator::~KMDBCreator()
{
    if (m_proc.isRunning())
        m_proc.kill();
    // do not delete the progress dialog anymore: it's persistent and owned by
    // it's parent. It will be destroyed along with its parent.
}
 
bool KMDBCreator::checkDriverDB(const TQString& dirname, const TQDateTime& d)
{
    // don't block GUI
    kapp->processEvents();
 
    // first check current directory
    TQFileInfo  dfi(dirname);
    if (dfi.lastModified() > d)
        return false;
 
    // then check most recent file in current directory
    TQDir   dir(dirname);
    const TQFileInfoList    *list = dir.entryInfoList(TQDir::Files,TQDir::Time);
    if (list && list->count() > 0 && list->getFirst()->lastModified() > d)
        return false;
 
    // then loop into subdirs
    TQStringList    slist = dir.entryList(TQDir::Dirs,TQDir::Time);
    for (TQStringList::ConstIterator it=slist.begin(); it!=slist.end(); ++it)
        if ((*it) != "." && (*it) != ".." && !checkDriverDB(dir.absFilePath(*it),d))
            return false;
 
    // everything is OK
    return true;
}
 
bool KMDBCreator::createDriverDB(const TQString& dirname, const TQString& filename, TQWidget *parent)
{
    bool    started(true);
 
    // initialize status
    m_status = false;
    m_firstflag = true;
 
    // start the child process
    m_proc.clearArguments();
    TQString    exestr = KMFactory::self()->manager()->driverDbCreationProgram();
    m_proc << exestr << dirname << filename;
    kdDebug() << "executing : " << exestr << " " << dirname << " " << filename << endl;
    TQString    msg;
    if (exestr.isEmpty())
        msg = i18n("No executable defined for the creation of the "
                   "driver database. This operation is not implemented.");
    else if (TDEStandardDirs::findExe(exestr).isEmpty())
        msg = i18n("The executable %1 could not be found in your "
                   "PATH. Check that this program exists and is "
               "accessible in your PATH variable.").arg(exestr);
    else if (!m_proc.start(TDEProcess::NotifyOnExit, TDEProcess::AllOutput))
        msg = i18n("Unable to start the creation of the driver "
                   "database. The execution of %1 failed.").arg(exestr);
    if (!msg.isEmpty())
    {
        KMManager::self()->setErrorMsg(msg);
        started = false;
    }
 
    // Create the dialog if the process is running and if needed
    if (started)
    {
        if (!m_dlg)
        {
            m_dlg = new TQProgressDialog(parent->topLevelWidget(),"progress-dialog",true);
            m_dlg->setLabelText(i18n("Please wait while TDE rebuilds a driver database."));
            m_dlg->setCaption(i18n("Driver Database"));
            connect(m_dlg,TQ_SIGNAL(canceled()),TQ_SLOT(slotCancelled()));
        }
        m_dlg->setMinimumDuration(0);   // always show the dialog
        m_dlg->setProgress(0);      // to force showing
    }
    else
        // be sure to emit this signal otherwise the DB widget won't never be notified
        emit dbCreated();
 
    return started;
}
 
void KMDBCreator::slotReceivedStdout(TDEProcess*, char *buf, int len)
{
    // save buffer
    TQString    str( TQCString(buf, len) );
 
    // get the number, cut the string at the first '\n' otherwise
    // the toInt() will return 0. If that occurs for the first number,
    // then the number of steps will be also 0.
    bool    ok;
    int p = str.find('\n');
    int n = str.mid(0, p).toInt(&ok);
 
    // process the number received
    if (ok && m_dlg)
    {
        if (m_firstflag)
        {
            m_dlg->setTotalSteps(n);
            m_firstflag = false;
        }
        else
        {
            m_dlg->setProgress(n);
        }
    }
}
 
void KMDBCreator::slotReceivedStderr(TDEProcess*, char*, int)
{
    // just discard it for the moment
}
 
void KMDBCreator::slotProcessExited(TDEProcess*)
{
    // delete the progress dialog
    if (m_dlg)
    {
        m_dlg->reset();
    }
 
    // set exit status
    m_status = (m_proc.normalExit() && m_proc.exitStatus() == 0);
    if (!m_status)
    {
        KMFactory::self()->manager()->setErrorMsg(i18n("Error while creating driver database: abnormal child-process termination."));
        // remove the incomplete driver DB file so that, it will be
        // reconstructed on next check
        TQFile::remove(m_proc.args()[2]);
    }
    //else
        emit dbCreated();
}
 
void KMDBCreator::slotCancelled()
{
    if (m_proc.isRunning())
        m_proc.kill();
    else
        emit dbCreated();
}
#include "kmdbcreator.moc"