kmdbcreator.cpp
/*
* This file is part of the KDE libraries
* Copyright (c) 2001 Michael Goffioul <kdeprint@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 <qprogressdialog.h>
#include <qfileinfo.h>
#include <qdir.h>
#include <klocale.h>
#include <kapplication.h>
#include <kstandarddirs.h>
#include <kdebug.h>
KMDBCreator::KMDBCreator(QObject *parent, const char *name)
: QObject(parent,name)
{
m_dlg = 0;
m_status = true;
connect(&m_proc,SIGNAL(receivedStdout(KProcess*,char*,int)),SLOT(slotReceivedStdout(KProcess*,char*,int)));
connect(&m_proc,SIGNAL(receivedStderr(KProcess*,char*,int)),SLOT(slotReceivedStderr(KProcess*,char*,int)));
connect(&m_proc,SIGNAL(processExited(KProcess*)),SLOT(slotProcessExited(KProcess*)));
}
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 QString& dirname, const QDateTime& d)
{
// don't block GUI
kapp->processEvents();
// first check current directory
QFileInfo dfi(dirname);
if (dfi.lastModified() > d)
return false;
// then check most recent file in current directory
QDir dir(dirname);
const QFileInfoList *list = dir.entryInfoList(QDir::Files,QDir::Time);
if (list && list->count() > 0 && list->getFirst()->lastModified() > d)
return false;
// then loop into subdirs
QStringList slist = dir.entryList(QDir::Dirs,QDir::Time);
for (QStringList::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 QString& dirname, const QString& filename, QWidget *parent)
{
bool started(true);
// initialize status
m_status = false;
m_firstflag = true;
// start the child process
m_proc.clearArguments();
QString exestr = KMFactory::self()->manager()->driverDbCreationProgram();
m_proc << exestr << dirname << filename;
kdDebug() << "executing : " << exestr << " " << dirname << " " << filename << endl;
QString msg;
if (exestr.isEmpty())
msg = i18n("No executable defined for the creation of the "
"driver database. This operation is not implemented.");
else if (KStandardDirs::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(KProcess::NotifyOnExit, KProcess::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 QProgressDialog(parent->topLevelWidget(),"progress-dialog",true);
m_dlg->setLabelText(i18n("Please wait while KDE rebuilds a driver database."));
m_dlg->setCaption(i18n("Driver Database"));
connect(m_dlg,SIGNAL(canceled()),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(KProcess*, char *buf, int len)
{
// save buffer
QString str( QCString(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(KProcess*, char*, int)
{
// just discard it for the moment
}
void KMDBCreator::slotProcessExited(KProcess*)
{
// 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
QFile::remove(m_proc.args()[2]);
}
//else
emit dbCreated();
}
void KMDBCreator::slotCancelled()
{
if (m_proc.isRunning())
m_proc.kill();
else
emit dbCreated();
}
#include "kmdbcreator.moc"

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