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# kmdbcreator.cpp

    00001 /*
    00002  *  This file is part of the KDE libraries
    00003  *  Copyright (c) 2001 Michael Goffioul <kdeprint@swing.be>
    00004  *
    00005  *  This library is free software; you can redistribute it and/or
    00006  *  modify it under the terms of the GNU Library General Public
    00007  *  License version 2 as published by the Free Software Foundation.
    00008  *
    00009  *  This library is distributed in the hope that it will be useful,
    00010  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
    00011  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    00012  *  Library General Public License for more details.
    00013  *
    00014  *  You should have received a copy of the GNU Library General Public License
    00015  *  along with this library; see the file COPYING.LIB.  If not, write to
    00016  *  the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
    00017  *  Boston, MA 02111-1307, USA.
    00018  **/
    00019
    00020 #include "kmdbcreator.h"
    00021 #include "kmfactory.h"
    00022 #include "kmmanager.h"
    00023
    00024 #include <qprogressdialog.h>
    00025 #include <qfileinfo.h>
    00026 #include <qdir.h>
    00027 #include <klocale.h>
    00028 #include <kapplication.h>
    00029 #include <kstandarddirs.h>
    00030 #include <kdebug.h>
    00031
    00032 KMDBCreator::KMDBCreator(QObject *parent, const char *name)
    00033 : QObject(parent,name)
    00034 {
    00035     m_dlg = 0;
    00036     m_status = true;
    00037
    00038     connect(&m_proc,SIGNAL(receivedStdout(KProcess*,char*,int)),SLOT(slotReceivedStdout(KProcess*,char*,int)));
    00039     connect(&m_proc,SIGNAL(receivedStderr(KProcess*,char*,int)),SLOT(slotReceivedStderr(KProcess*,char*,int)));
    00040     connect(&m_proc,SIGNAL(processExited(KProcess*)),SLOT(slotProcessExited(KProcess*)));
    00041 }
    00042
    00043 KMDBCreator::~KMDBCreator()
    00044 {
    00045     if (m_proc.isRunning())
    00046         m_proc.kill();
    00047     // do not delete the progress dialog anymore: it's persistent and owned by
    00048     // it's parent. It will be destroyed along with its parent.
    00049 }
    00050
    00051 bool KMDBCreator::checkDriverDB(const QString& dirname, const QDateTime& d)
    00052 {
    00053     // don't block GUI
    00054     kapp->processEvents();
    00055
    00056     // first check current directory
    00057     QFileInfo   dfi(dirname);
    00058     if (dfi.lastModified() > d)
    00059         return false;
    00060
    00061     // then check most recent file in current directory
    00062     QDir    dir(dirname);
    00063     const QFileInfoList *list = dir.entryInfoList(QDir::Files,QDir::Time);
    00064     if (list && list->count() > 0 && list->getFirst()->lastModified() > d)
    00065         return false;
    00066
    00067     // then loop into subdirs
    00068     QStringList slist = dir.entryList(QDir::Dirs,QDir::Time);
    00069     for (QStringList::ConstIterator it=slist.begin(); it!=slist.end(); ++it)
    00070         if ((*it) != "." && (*it) != ".." && !checkDriverDB(dir.absFilePath(*it),d))
    00071             return false;
    00072
    00073     // everything is OK
    00074     return true;
    00075 }
    00076
    00077 bool KMDBCreator::createDriverDB(const QString& dirname, const QString& filename, QWidget *parent)
    00078 {
    00079     bool    started(true);
    00080
    00081     // initialize status
    00082     m_status = false;
    00083     m_firstflag = true;
    00084
    00085     // start the child process
    00086     m_proc.clearArguments();
    00087     QString exestr = KMFactory::self()->manager()->driverDbCreationProgram();
    00088     m_proc << exestr << dirname << filename;
    00089     kdDebug() << "executing : " << exestr << " " << dirname << " " << filename << endl;
    00090     QString msg;
    00091     if (exestr.isEmpty())
    00092         msg = i18n("No executable defined for the creation of the "
    00093                    "driver database. This operation is not implemented.");
    00094     else if (KStandardDirs::findExe(exestr).isEmpty())
    00095         msg = i18n("The executable %1 could not be found in your "
    00096                    "PATH. Check that this program exists and is "
    00097                "accessible in your PATH variable.").arg(exestr);
    00098     else if (!m_proc.start(KProcess::NotifyOnExit, KProcess::AllOutput))
    00099         msg = i18n("Unable to start the creation of the driver "
    00100                    "database. The execution of %1 failed.").arg(exestr);
    00101     if (!msg.isEmpty())
    00102     {
    00103         KMManager::self()->setErrorMsg(msg);
    00104         started = false;
    00105     }
    00106
    00107     // Create the dialog if the process is running and if needed
    00108     if (started)
    00109     {
    00110         if (!m_dlg)
    00111         {
    00112             m_dlg = new QProgressDialog(parent->topLevelWidget(),"progress-dialog",true);
    00113             m_dlg->setLabelText(i18n("Please wait while KDE rebuilds a driver database."));
    00114             m_dlg->setCaption(i18n("Driver Database"));
    00115             connect(m_dlg,SIGNAL(canceled()),SLOT(slotCancelled()));
    00116         }
    00117         m_dlg->setMinimumDuration(0);   // always show the dialog
    00118         m_dlg->setProgress(0);      // to force showing
    00119     }
    00120     else
    00121         // be sure to emit this signal otherwise the DB widget won't never be notified
    00122         emit dbCreated();
    00123
    00124     return started;
    00125 }
    00126
    00127 void KMDBCreator::slotReceivedStdout(KProcess*, char *buf, int len)
    00128 {
    00129     // save buffer
    00130     QString str( QCString(buf, len) );
    00131
    00132     // get the number, cut the string at the first '\n' otherwise
    00133     // the toInt() will return 0. If that occurs for the first number,
    00134     // then the number of steps will be also 0.
    00135     bool    ok;
    00136     int p = str.find('\n');
    00137     int n = str.mid(0, p).toInt(&ok);
    00138
    00139     // process the number received
    00140     if (ok && m_dlg)
    00141     {
    00142         if (m_firstflag)
    00143         {
    00144             m_dlg->setTotalSteps(n);
    00145             m_firstflag = false;
    00146         }
    00147         else
    00148         {
    00149             m_dlg->setProgress(n);
    00150         }
    00151     }
    00152 }
    00153
    00154 void KMDBCreator::slotReceivedStderr(KProcess*, char*, int)
    00155 {
    00156     // just discard it for the moment
    00157 }
    00158
    00159 void KMDBCreator::slotProcessExited(KProcess*)
    00160 {
    00161     // delete the progress dialog
    00162     if (m_dlg)
    00163     {
    00164         m_dlg->reset();
    00165     }
    00166
    00167     // set exit status
    00168     m_status = (m_proc.normalExit() && m_proc.exitStatus() == 0);
    00169     if (!m_status)
    00170     {
    00171         KMFactory::self()->manager()->setErrorMsg(i18n("Error while creating driver database: abnormal child-process termination."));
    00172         // remove the incomplete driver DB file so that, it will be
    00173         // reconstructed on next check
    00174         QFile::remove(m_proc.args()[2]);
    00175     }
    00176     //else
    00177         emit dbCreated();
    00178 }
    00179
    00180 void KMDBCreator::slotCancelled()
    00181 {
    00182     if (m_proc.isRunning())
    00183         m_proc.kill();
    00184     else
    00185         emit dbCreated();
    00186 }
    00187 #include "kmdbcreator.moc"

This file is part of the documentation for kdeprint Library Version 3.4.1.
Documentation copyright © 1996-2004 the KDE developers.
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