kgpgeditor.cpp

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/*
 * Copyright (C) 2002 Jean-Baptiste Mardelle <bj@altern.org>
 * Copyright (C) 2007,2008,2009,2010,2011 Rolf Eike Beer <kde@opensource.sf-tec.de>
 */

/***************************************************************************
 *                                                                         *
 *   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.                                   *
 *                                                                         *
 ***************************************************************************/

#include "kgpgeditor.h"

#include "detailedconsole.h"
#include "selectsecretkey.h"
#include "kgpgmd5widget.h"
#include "kgpgsettings.h"
#include "keyservers.h"
#include "sourceselect.h"
#include "kgpg.h"
#include "keysmanager.h"
#include "editor/kgpgtextedit.h"
#include "transactions/kgpgdecrypt.h"
#include "transactions/kgpgkeyservergettransaction.h"
#include "transactions/kgpgsigntext.h"
#include "transactions/kgpgverify.h"
#include <kgpgexternalactions.h>

#include <KAction>
#include <KActionCollection>
#include <KDebug>
#include <KEncodingFileDialog>
#include <KFind>
#include <KFindDialog>
#include <KIcon>
#include <KLocale>
#include <KMenuBar>
#include <KMessageBox>
#include <KRecentFilesAction>
#include <KShortcut>
#include <KStandardAction>
#include <KTemporaryFile>
#include <KToggleAction>
#include <KToolBar>
#include <QPainter>
#include <QTextCodec>
#include <QTextStream>
#include <QVBoxLayout>
#include <QWidget>
#include <QtDBus/QtDBus>
#include <QtGui/QPrintDialog>
#include <QtGui/QPrinter>
#include <kio/netaccess.h>
#include <kio/renamedialog.h>

class KgpgView : public QWidget {
public:
    KgpgView(QWidget *parent, KgpgTextEdit *editor, KToolBar *toolbar);
};

KgpgView::KgpgView(QWidget *parent, KgpgTextEdit *editor, KToolBar *toolbar)
    : QWidget(parent)
{
    QVBoxLayout *vb = new QVBoxLayout(this);
    vb->setSpacing(3);
    vb->addWidget(editor);
    vb->addWidget(toolbar);

    setAcceptDrops(true);
}

KgpgEditor::KgpgEditor(KeysManager *parent, KGpgItemModel *model, Qt::WFlags f)
    : KXmlGuiWindow(0, f),
    m_editor(new KgpgTextEdit(this, model, parent)),
    m_recentfiles(NULL),
    m_find(0),
    m_textchanged(false),
    m_emptytext(true),
    m_model(model),
    m_parent(parent)
{
    // call inits to invoke all other construction parts
    initActions();

    connect(m_editor, SIGNAL(resetEncoding(bool)), SLOT(slotResetEncoding(bool)));
    KgpgView *kb = new KgpgView(this, m_editor, toolBar(QLatin1String( "gpgToolBar" )));
    setCentralWidget(kb);
    setCaption(i18n("Untitled"), false);
    m_editredo->setEnabled(false);
    m_editundo->setEnabled(false);
    m_editcopy->setEnabled(false);
    m_editcut->setEnabled(false);

    setObjectName( QLatin1String("editor" ));
    slotSetFont(KGpgSettings::font());
    setupGUI((ToolBar | Keys | StatusBar | Save | Create), QLatin1String( "kgpgeditor.rc" ));
    setAutoSaveSettings(QLatin1String( "Editor" ), true);

    connect(m_editor, SIGNAL(textChanged()), SLOT(modified()));
    connect(m_editor, SIGNAL(newText()), SLOT(newText()));
    connect(m_editor, SIGNAL(undoAvailable(bool)), SLOT(slotUndoAvailable(bool)));
    connect(m_editor, SIGNAL(redoAvailable(bool)), SLOT(slotRedoAvailable(bool)));
    connect(m_editor, SIGNAL(copyAvailable(bool)), SLOT(slotCopyAvailable(bool)));
}

KgpgEditor::~KgpgEditor()
{
    m_recentfiles->saveEntries( KConfigGroup(KGlobal::config(), "Recent Files" ) );
}

void KgpgEditor::openDocumentFile(const KUrl& url, const QString &encoding)
{
    QString tempopenfile;
    if(KIO::NetAccess::download(url, tempopenfile, this))
    {
        QFile qfile(tempopenfile);
        if (qfile.open(QIODevice::ReadOnly))
        {
            QTextStream t(&qfile);
            t.setCodec(encoding.toAscii());
            m_editor->setPlainText(t.readAll());
            qfile.close();
            m_docname = url;
            m_textchanged = false;
            m_emptytext = false;
            setCaption(url.fileName(), false);
        m_recentfiles->addUrl(url);
        }
        KIO::NetAccess::removeTempFile(tempopenfile);
    }
}

void KgpgEditor::openEncryptedDocumentFile(const KUrl& url)
{
    m_editor->slotDroppedFile(url);
}

void KgpgEditor::slotSetFont(QFont myFont)
{
    m_editor->setFont(myFont);
}

void KgpgEditor::closeWindow()
{
    m_recentfiles->saveEntries( KConfigGroup(KGlobal::config(), "Recent Files" ) );
    close();
}

void KgpgEditor::saveOptions()
{
    KGpgSettings::setFirstRun(false);
    KGpgSettings::self()->writeConfig();
}

void KgpgEditor::initActions()
{
    KStandardAction::openNew(this, SLOT(slotFileNew()), actionCollection());
    KStandardAction::open(this, SLOT(slotFileOpen()), actionCollection());
    KStandardAction::save(this, SLOT(slotFileSave()), actionCollection());
    KStandardAction::saveAs(this, SLOT(slotFileSaveAs()), actionCollection());
    KStandardAction::close(this, SLOT(slotFileClose()), actionCollection());
    KStandardAction::paste(this, SLOT(slotEditPaste()), actionCollection());
    KStandardAction::print(this, SLOT(slotFilePrint()), actionCollection());
    KStandardAction::selectAll(this, SLOT(slotSelectAll()), actionCollection());
    KStandardAction::find(this, SLOT(slotFind()), actionCollection());
    KStandardAction::findNext(this, SLOT(slotFindNext()), actionCollection());
    KStandardAction::findPrev(this, SLOT(slotFindPrev()), actionCollection());
    actionCollection()->addAction(KStandardAction::Preferences, QLatin1String( "options_configure" ),
                                  this, SLOT(slotOptions()));

    m_editundo = KStandardAction::undo(this, SLOT(slotundo()), actionCollection());
    m_editredo = KStandardAction::redo(this, SLOT(slotredo()), actionCollection());
    m_editcopy = KStandardAction::copy(this, SLOT(slotEditCopy()), actionCollection());
    m_editcut  = KStandardAction::cut(this, SLOT(slotEditCut()), actionCollection());

    m_recentfiles = KStandardAction::openRecent(this, SLOT(openDocumentFile(KUrl)), this);
    menuBar()->addAction(m_recentfiles);

    m_recentfiles->loadEntries( KConfigGroup(KGlobal::config(), "Recent Files" ) );
    m_recentfiles->setMaxItems(KGpgSettings::recentFiles());

    KAction *action = actionCollection()->addAction(QLatin1String("file_encrypt"), this, SLOT(slotFilePreEnc()));
    action->setIcon(KIcon( QLatin1String( "document-encrypt" )));
    action->setText(i18n("&Encrypt File..."));

    action = actionCollection()->addAction(QLatin1String("file_decrypt"), this, SLOT(slotFilePreDec()));
    action->setIcon(KIcon( QLatin1String( "document-decrypt" )));
    action->setText(i18n("&Decrypt File..."));

    action = actionCollection()->addAction(QLatin1String("key_manage"), this, SLOT(slotKeyManager()));
    action->setIcon(KIcon( QLatin1String( "kgpg" )));
    action->setText(i18n("&Open Key Manager"));

    action = actionCollection()->addAction(QLatin1String("sign_generate"), this, SLOT(slotPreSignFile()));
    action->setText(i18n("&Generate Signature..."));
    action->setIcon(KIcon( QLatin1String( "document-sign-key" )));

    action = actionCollection()->addAction(QLatin1String("sign_verify"), this, SLOT(slotPreVerifyFile()));
    action->setText(i18n("&Verify Signature..."));

    action = actionCollection()->addAction(QLatin1String("sign_check"), this, SLOT(slotCheckMd5()));
    action->setText(i18n("&Check MD5 Sum..."));

    m_encodingaction = actionCollection()->add<KToggleAction>(QLatin1String("charsets"), this, SLOT(slotSetCharset()));
    m_encodingaction->setText(i18n("&Unicode (utf-8) Encoding"));

    actionCollection()->addAction(m_recentfiles->objectName(), m_recentfiles);

    action = actionCollection()->addAction(QLatin1String("text_encrypt"), m_editor, SLOT(slotEncode()));
    action->setIcon(KIcon( QLatin1String( "document-encrypt" )));
    action->setText(i18n("En&crypt"));

    action = actionCollection()->addAction(QLatin1String("text_decrypt"), m_editor, SLOT(slotDecode()));
    action->setIcon(KIcon( QLatin1String( "document-decrypt" )));
    action->setText(i18n("&Decrypt"));

    action = actionCollection()->addAction(QLatin1String("text_sign_verify"), m_editor, SLOT(slotSignVerify()));
    action->setIcon(KIcon( QLatin1String( "document-sign-key" )));
    action->setText(i18n("S&ign/Verify"));
}

bool KgpgEditor::queryClose()
{
    bool b = saveBeforeClear();
    if (b) {
        m_editor->clear();
        newText();
    }
    return b;
}

bool KgpgEditor::saveBeforeClear()
{
    if (m_textchanged)
    {
        QString fname;
        if (m_docname.fileName().isEmpty())
            fname = i18n("Untitled");
        else
            fname = m_docname.fileName();

        QString msg = i18n("The document \"%1\" has changed.\nDo you want to save it?", fname);
        QString caption = i18n("Close the document");
        int res = KMessageBox::warningYesNoCancel(this, msg, caption, KStandardGuiItem::save(), KStandardGuiItem::discard());
        if (res == KMessageBox::Yes)
            return slotFileSave();
        else
        if (res == KMessageBox::No)
            return true;
        else
            return false;
    }

    return true;
}

void KgpgEditor::slotFileNew()
{
    if (saveBeforeClear())
    {
        m_editor->clear();
        newText();
    }
}

void KgpgEditor::slotFileOpen()
{
    if (saveBeforeClear())
    {
        KEncodingFileDialog::Result loadResult;
        loadResult = KEncodingFileDialog::getOpenUrlAndEncoding(QString(), QString(), QString(), this);
        KUrl url = loadResult.URLs.first();
        m_textencoding = loadResult.encoding;

        if(!url.isEmpty())
            openDocumentFile(url, m_textencoding);
    }
}

bool KgpgEditor::slotFileSave()
{
    QString filn = m_docname.path();
    if (filn.isEmpty())
        return slotFileSaveAs();

    QTextCodec *cod = QTextCodec::codecForName(m_textencoding.toAscii());

    if (cod == NULL) {
        KMessageBox::sorry(this, i18n("The document could not been saved, as the selected codec is not supported."));
        return false;
    }

    if (!checkEncoding(cod))
    {
        KMessageBox::sorry(this, i18n("The document could not been saved, as the selected encoding cannot encode every unicode character in it."));
        return false;
    }

    if (m_docname.isLocalFile())
    {
        QFile f(filn);
        if (!f.open(QIODevice::WriteOnly))
        {
            KMessageBox::sorry(this, i18n("The document could not be saved, please check your permissions and disk space."));
            return false;
        }

        QTextStream t(&f);
        t.setCodec(cod);
        t << m_editor->toPlainText();
        f.close();
    }
    else
    {
        KTemporaryFile tmpfile;
        tmpfile.open();
        QTextStream stream(&tmpfile);
        stream.setCodec(cod);
        stream << m_editor->toPlainText();

        if(!KIO::NetAccess::upload(tmpfile.fileName(), m_docname, this))
        {
            KMessageBox::sorry(this, i18n("The document could not be saved, please check your permissions and disk space."));
            return false;
        }
    }

    m_textchanged = false;
    m_emptytext = false;
    setCaption(m_docname.fileName(), false);
    return true;
}

bool KgpgEditor::slotFileSaveAs()
{
    KEncodingFileDialog::Result saveResult;
    saveResult = KEncodingFileDialog::getSaveUrlAndEncoding(QString(), QString(), QString(), this);
    KUrl url;

    if (!saveResult.URLs.empty())
        url = saveResult.URLs.first();

    if(!url.isEmpty()) {
        const QString selectedEncoding = saveResult.encoding;
        if (url.isLocalFile()) {
            QString filn = url.path();
            QFile f(url.path());
            if (f.exists()) {
                const QString message = i18n("Overwrite existing file %1?", url.fileName());
                int result = KMessageBox::warningContinueCancel(this, message, QString(), KStandardGuiItem::overwrite());
                if (result == KMessageBox::Cancel)
                    return false;
            }
            f.close();
        } else if (KIO::NetAccess::exists(url, KIO::NetAccess::DestinationSide, this)) {
            const QString message = i18n("Overwrite existing file %1?", url.fileName());
            int result = KMessageBox::warningContinueCancel(this, message, QString(), KStandardGuiItem::overwrite());
            if (result == KMessageBox::Cancel)
                return false;
        }

        m_docname = url;
        m_textencoding = selectedEncoding;
        slotFileSave();
        return true;
    }

    return false;
}

void KgpgEditor::slotFilePrint()
{
    QPrinter prt;
    QPointer<QPrintDialog> printDialog = new QPrintDialog(&prt, this);
    if (printDialog->exec() == QDialog::Accepted) {
        int width = prt.width();
        int height = prt.height();
        QPainter painter(&prt);
        painter.drawText(0, 0, width, height, Qt::AlignLeft | Qt::AlignTop | Qt::TextDontClip, m_editor->toPlainText());
    }
    delete printDialog;
}

void KgpgEditor::slotFind()
{
    QPointer<KFindDialog> fd = new KFindDialog(this);

    if (m_find) {
        fd->setOptions(m_find->options());
        fd->setPattern(m_find->pattern());
    }

    if (fd->exec() != QDialog::Accepted) {
        delete fd;
        return;
    }

    if (!m_find) {
        m_find = new KFind(fd->pattern(), fd->options(), this);

        if (m_find->options() & KFind::FromCursor)
            m_find->setData(m_editor->toPlainText(), m_editor->textCursor().selectionStart());
        else
            m_find->setData(m_editor->toPlainText());
        connect(m_find, SIGNAL(highlight(QString,int,int)), m_editor, SLOT(slotHighlightText(QString,int,int)));
        connect(m_find, SIGNAL(findNext()), this, SLOT(slotFindText()));
    } else {
        m_find->setPattern(fd->pattern());
        m_find->setOptions(fd->options());
        m_find->resetCounts();
    }

    slotFindText();
    delete fd;
}

void KgpgEditor::slotFindNext()
{
    slotFindText();
}

void KgpgEditor::slotFindPrev()
{
    if(!m_find)
    {
       slotFind();
       return;
    }
    long oldopt = m_find->options();
    long newopt = oldopt ^ KFind::FindBackwards;
    m_find->setOptions(newopt);
    slotFindText();
    m_find->setOptions(oldopt);
}

void KgpgEditor::slotFindText()
{
    if (!m_find)
    {
        slotFind();
        return;
    }

    if (m_find->find() == KFind::NoMatch)
    {
        if (m_find->numMatches() == 0)
        {
            m_find->displayFinalDialog();
            delete m_find;
            m_find = 0;
        }
        else
        {
            if (m_find->shouldRestart(true, false))
            {
                m_find->setData(m_editor->toPlainText());
                slotFindText();
            }
            else
                m_find->closeFindNextDialog();
        }
    }
}

void KgpgEditor::slotFilePreEnc()
{
    KUrl::List urls = KFileDialog::getOpenUrls(KUrl(), i18n("*|All Files"), this, i18n("Open File to Encode"));
    if (urls.isEmpty())
        return;

    KGpgExternalActions::encryptFiles(m_parent, urls);
}

void KgpgEditor::slotFilePreDec()
{
    KUrl url = KFileDialog::getOpenUrl(KUrl(), i18n("*|All Files"), this, i18n("Open File to Decode"));
    if (url.isEmpty())
        return;

    QString oldname = url.fileName();
    QString newname;

    if (oldname.endsWith(QLatin1String(".gpg")) || oldname.endsWith(QLatin1String(".asc")) || oldname.endsWith(QLatin1String(".pgp")))
        oldname.chop(4);
    else
        oldname.append(QLatin1String( ".clear" ));
    oldname.prepend(url.directory(KUrl::AppendTrailingSlash));

    QPointer<KDialog> popn = new KDialog(this);
    popn->setCaption(  i18n("Decrypt File To") );
    popn->setButtons( KDialog::Ok | KDialog::Cancel );
    popn->setDefaultButton( KDialog::Ok );
    popn->setModal( true );

    SrcSelect *page = new SrcSelect();
    popn->setMainWidget(page);
    page->newFilename->setUrl(oldname);
    page->newFilename->setMode(KFile::File);
    page->newFilename->setWindowTitle(i18n("Save File"));

    page->checkClipboard->setText(i18n("Editor"));
    page->resize(page->minimumSize());
    popn->resize(popn->minimumSize());
    if (popn->exec() == QDialog::Accepted)
    {
        if (page->checkFile->isChecked())
            newname = page->newFilename->url().path();
    }
    else
    {
        delete popn;
        return;
    }
    delete popn;

    if (!newname.isEmpty())
    {
        QFile fgpg(newname);
        if (fgpg.exists()) {
        QPointer<KIO::RenameDialog> over = new KIO::RenameDialog(this, i18n("File Already Exists"), KUrl(), KUrl::fromPath(newname), KIO::M_OVERWRITE);

        if (over->exec() != QDialog::Accepted) {
            delete over;
            return;
        }
        newname = over->newDestUrl().path();
        delete over;
        }

    KGpgDecrypt *decr = new KGpgDecrypt(this, url, KUrl(newname));
    connect(decr, SIGNAL(done(int)), SLOT(slotLibraryDone()));
    decr->start();
    }
    else
        openEncryptedDocumentFile(url);
}

void
KgpgEditor::slotLibraryDone()
{
    sender()->deleteLater();
}

void KgpgEditor::slotKeyManager()
{
    m_parent->show();
    m_parent->raise();
}

void KgpgEditor::slotFileClose()
{
    saveOptions();
    close();
}

void KgpgEditor::slotundo()
{
    m_editor->undo();
}

void KgpgEditor::slotredo()
{
    m_editor->redo();
}

void KgpgEditor::slotEditCut()
{
    m_editor->cut();
}

void KgpgEditor::slotEditCopy()
{
    m_editor->copy();
}

void KgpgEditor::slotEditPaste()
{
    m_editor->paste();
}

void KgpgEditor::slotSelectAll()
{
    m_editor->selectAll();
}

void KgpgEditor::slotSetCharset()
{
    if (!m_encodingaction->isChecked())
        m_editor->setPlainText(QString::fromUtf8(m_editor->toPlainText().toAscii()));
    else
    {
        if (checkEncoding(QTextCodec::codecForLocale()))
            return;
        m_editor->setPlainText(QLatin1String( m_editor->toPlainText().toUtf8() ));
    }
}

bool KgpgEditor::checkEncoding(QTextCodec *codec)
{
    return codec->canEncode(m_editor->toPlainText());
}

void KgpgEditor::slotResetEncoding(bool enc)
{
    m_encodingaction->setChecked(enc);
}

void KgpgEditor::slotPreSignFile()
{
    // create a detached signature for a chosen file
    KUrl url = KFileDialog::getOpenUrl(KUrl(), i18n("*|All Files"), this, i18n("Open File to Sign"));
    if (!url.isEmpty())
        slotSignFile(url);
}

void KgpgEditor::slotSignFile(const KUrl &url)
{
    // create a detached signature for a chosen file
    if (!url.isEmpty())
    {
        QString signKeyID;
        QPointer<KgpgSelectSecretKey> opts = new KgpgSelectSecretKey(this, m_model, false);
        if (opts->exec() == QDialog::Accepted) {
            signKeyID = opts->getKeyID();
        } else {
            delete opts;
            return;
        }

        delete opts;

    KGpgSignText::SignOptions sopts = KGpgSignText::DetachedSignature;
    if (KGpgSettings::asciiArmor())
        sopts |= KGpgSignText::AsciiArmored;

    KGpgSignText *signt = new KGpgSignText(this, signKeyID, KUrl::List(url), sopts);
    connect(signt, SIGNAL(done(int)), SLOT(slotSignFileFin()));
    signt->start();
    }
}

void KgpgEditor::slotSignFileFin()
{
    sender()->deleteLater();
}

void KgpgEditor::slotPreVerifyFile()
{
    KUrl url = KFileDialog::getOpenUrl(KUrl(), i18n("*|All Files"), this, i18n("Open File to Verify"));
    slotVerifyFile(url);
}

void KgpgEditor::slotVerifyFile(const KUrl &url)
{
    if (!url.isEmpty())
    {
        QString sigfile;
    if (!url.fileName().endsWith(QLatin1String(".sig")))
        {
            sigfile = url.path() + QLatin1String( ".sig" );
            QFile fsig(sigfile);
            if (!fsig.exists())
            {
                sigfile = url.path() + QLatin1String( ".asc" );
                QFile fsig(sigfile);
                // if no .asc or .sig signature file included, assume the file is internally signed
                if (!fsig.exists())
                    sigfile.clear();
            }
        }

    KUrl::List chkfiles;
    if (sigfile.isEmpty())
        chkfiles << url;
    else
        chkfiles << KUrl::fromPath(sigfile);

    KGpgVerify *verify = new KGpgVerify(this, chkfiles);
    connect(verify, SIGNAL(done(int)), m_editor, SLOT(slotVerifyDone(int)));
    verify->start();
    }
}

void KgpgEditor::slotCheckMd5()
{
    // display md5 sum for a chosen file
    KUrl url = KFileDialog::getOpenUrl(KUrl(), i18n("*|All Files"), this, i18n("Open File to Verify"));
    if (!url.isEmpty()) {
        QPointer<Md5Widget> mdwidget = new Md5Widget(this, url);
        mdwidget->exec();
        delete mdwidget;
    }
}

void KgpgEditor::importSignatureKey(const QString &id, const QString &fileName)
{
    sender()->deleteLater();

    if (KMessageBox::questionYesNo(0,
            i18n("<qt><b>Missing signature:</b><br />Key id: %1<br /><br />Do you want to import this key from a keyserver?</qt>", id),
            fileName, KGuiItem(i18n("Import")), KGuiItem(i18n("Do Not Import"))) != KMessageBox::Yes)
        return;

    KeyServer *ks = new KeyServer(this);

    connect(ks, SIGNAL(importFinished(QStringList)), SLOT(slotDownloadKeysFinished(QStringList)));
    connect(ks, SIGNAL(importFailed()), ks, SLOT(deleteLater()));

    ks->startImport(QStringList(id), QString(),QLatin1String( qgetenv("http_proxy") ));
}

void KgpgEditor::slotDownloadKeysFinished(QStringList ids)
{
    m_parent->refreshKeys(ids);

    sender()->deleteLater();
}

void
KgpgEditor::slotVerifyFinished(const QString &id, const QString &message)
{
    sender()->deleteLater();

    QString showId;

    if (id.isEmpty())
        showId = i18n("No signature found.");
    else
        showId = id;

    (void) new KgpgDetailedInfo(this, showId, message, QStringList(),
            i18nc("Caption of message box", "Verification Finished"));
}

void KgpgEditor::slotOptions()
{
    m_parent->showOptions();
}

void KgpgEditor::modified()
{
    QString capt = m_docname.fileName();
    if (m_emptytext) {
        m_textchanged = !m_editor->toPlainText().isEmpty();
        if (capt.isEmpty())
            capt = i18n("Untitled");
    } else if (!m_textchanged) {
        m_textchanged = true;
    }
    setCaption(capt, m_textchanged);
    m_editor->document()->setModified(m_textchanged);
}

void KgpgEditor::slotUndoAvailable(const bool v)
{
    m_editundo->setEnabled(v);
}

void KgpgEditor::slotRedoAvailable(const bool v)
{
    m_editredo->setEnabled(v);
}

void KgpgEditor::slotCopyAvailable(const bool v)
{
    m_editcopy->setEnabled(v);
    m_editcut->setEnabled(v);
}

void KgpgEditor::newText()
{
    m_textchanged = false;
    m_emptytext = true;
    m_docname.clear();
    setCaption(i18n("Untitled"), false);
    slotResetEncoding(false);
}

#include "kgpgeditor.moc"