kdelibs/kdeui/widgets/ktextedit.cpp

/* This file is part of the KDE libraries
   Copyright (C) 2002 Carsten Pfeiffer <pfeiffer@kde.org>
                 2005 Michael Brade <brade@kde.org>
		 2012 Laurent Montel <montel@kde.org>

   This library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Library General Public
   License as published by the Free Software Foundation; either
   version 2 of the License, or (at your option) any later version.

   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 "ktextedit.h"

#include <QApplication>
#include <QClipboard>
#include <QtGui/qevent.h>
#include <QMenu>
#include <QPainter>
#include <QScrollBar>
#include <QTextCursor>

#include <kdebug.h>
#include <kaction.h>
#include <kcursor.h>
#include <kstandardaction.h>
#include <kstandardshortcut.h>
#include <kicon.h>
#include <kiconloader.h>
#include <klocale.h>
#include <kdialog.h>
#include <kreplacedialog.h>
#include <kfinddialog.h>
#include <kfind.h>
#include <kreplace.h>
#include <kmessagebox.h>
#include <kmenu.h>
#include <kwindowsystem.h>
#include <kspellhighlighter.h>
#include <QDebug>

static void deleteWord(QTextCursor cursor, const QTextCursor::MoveOperation op)
{
    cursor.clearSelection();
    cursor.movePosition(op, QTextCursor::KeepAnchor);
    cursor.removeSelectedText();
}

class KTextEdit::Private
{
  public:
    Private(KTextEdit *_parent)
        : parent(_parent),
        autoSpellCheckAction(nullptr),
        allowTab(nullptr),
        italicizePlaceholder(true),
        customPalette(false),
        checkSpellingEnabled(false),
        findReplaceEnabled(true),
        showTabAction(true),
        highlighter(nullptr),
        findDlg(nullptr),
        find(nullptr),
        repDlg(nullptr),
        replace(nullptr),
        findIndex(0),
        repIndex(0),
        lastReplacedPosition(-1)
    {
        // Check the default settings to see if spellchecking should be enabled.
        KConfigGroup spellgroup(KGlobal::config(), "Spelling");
        checkSpellingEnabled = spellgroup.readEntry("checkerEnabledByDefault", false);

        // i18n: Placeholder text in text edit widgets is the text appearing
        // before any user input, briefly explaining to the user what to type
        // (e.g. "Enter message").
        // By default the text is set in italic, which may not be appropriate
        // for some languages and scripts (e.g. for CJK ideographs).
        QString metaMsg = i18nc("Italic placeholder text in line edits: 0 no, 1 yes", "1");
        italicizePlaceholder = (metaMsg.trimmed() != QString('0'));
    }

    ~Private()
    {
        delete highlighter;
        delete findDlg;
        delete find;
        delete replace;
        delete repDlg;
    }

    /**
     * Checks whether we should/should not consume a key used as a shortcut.
     * This makes it possible to handle shortcuts in the focused widget before any
     * window-global QAction is triggered.
     */
    bool overrideShortcut(const QKeyEvent *e);
    /**
     * Actually handle a shortcut event.
     */
    bool handleShortcut(const QKeyEvent *e);

    void slotFindHighlight(const QString &text, int matchingIndex, int matchingLength);
    void slotReplaceText(const QString &text, int replacementIndex, int /*replacedLength*/, int matchedLength);

    void menuActivated(QAction *action);

    QRect clickMessageRect() const;

    void init();

    KTextEdit *parent;
    QAction *autoSpellCheckAction;
    QAction *allowTab;
    QString clickMessage;
    bool italicizePlaceholder;
    bool customPalette;

    bool checkSpellingEnabled;
    bool findReplaceEnabled;
    bool showTabAction;
    KSpellHighlighter *highlighter;
    KFindDialog *findDlg;
    KFind *find;
    KReplaceDialog *repDlg;
    KReplace *replace;
    int findIndex;
    int repIndex;
    int lastReplacedPosition;
};

void KTextEdit::Private::menuActivated(QAction *action)
{
    if (action == autoSpellCheckAction) {
        parent->setCheckSpellingEnabled(!parent->checkSpellingEnabled());
    } else if (action == allowTab) {
        parent->setTabChangesFocus(!parent->tabChangesFocus());
    }
}

void KTextEdit::Private::slotFindHighlight(const QString &text, int matchingIndex, int matchingLength)
{
    Q_UNUSED(text)
    // kDebug() << "Highlight: [" << text << "] mi:" << matchingIndex << " ml:" << matchingLength;
    QTextCursor tc = parent->textCursor();
    tc.setPosition(matchingIndex);
    tc.movePosition(QTextCursor::NextCharacter, QTextCursor::KeepAnchor, matchingLength);
    parent->setTextCursor(tc);
    parent->ensureCursorVisible();
}

void KTextEdit::Private::slotReplaceText(const QString &text, int replacementIndex, int replacedLength, int matchedLength)
{
    // kDebug() << "Replace: [" << text << "] ri:" << replacementIndex << " rl:" << replacedLength << " ml:" << matchedLength;
    QTextCursor tc = parent->textCursor();
    tc.setPosition(replacementIndex);
    tc.movePosition(QTextCursor::NextCharacter, QTextCursor::KeepAnchor, matchedLength);
    tc.removeSelectedText();
    tc.insertText(text.mid(replacementIndex, replacedLength));
    if (replace->options() & KReplaceDialog::PromptOnReplace) {
        parent->setTextCursor(tc);
        parent->ensureCursorVisible();
    }
    lastReplacedPosition = replacementIndex;
}

QRect KTextEdit::Private::clickMessageRect() const
{
    int margin = int(parent->document()->documentMargin());
    QRect rect = parent->viewport()->rect().adjusted(margin, margin, -margin, -margin);
    return parent->fontMetrics().boundingRect(rect, Qt::AlignTop | Qt::TextWordWrap, clickMessage);
}

void KTextEdit::Private::init()
{
    KCursor::setAutoHideCursor(parent, true, false);
}

KTextEdit::KTextEdit(const QString &text, QWidget *parent)
    : QTextEdit(text, parent),
    d( new Private(this))
{
    d->init();
}

KTextEdit::KTextEdit(QWidget *parent)
    : QTextEdit(parent),
    d(new Private(this))
{
    d->init();
}

KTextEdit::~KTextEdit()
{
    delete d;
}

bool KTextEdit::event(QEvent* ev)
{
    if (ev->type() == QEvent::ShortcutOverride) {
        QKeyEvent *e = static_cast<QKeyEvent*>(ev);
        if (d->overrideShortcut(e)) {
            e->accept();
            return true;
        }
    }
    return QTextEdit::event(ev);
}

bool KTextEdit::Private::handleShortcut(const QKeyEvent *event)
{
    const int key = (event->key() | event->modifiers());

    if (KStandardShortcut::copy().matches(key) != QKeySequence::NoMatch) {
        parent->copy();
        return true;
    } else if (KStandardShortcut::paste().matches(key) != QKeySequence::NoMatch) {
        parent->paste();
        return true;
    } else if (KStandardShortcut::cut().matches(key) != QKeySequence::NoMatch) {
        parent->cut();
        return true;
    } else if (KStandardShortcut::undo().matches(key) != QKeySequence::NoMatch) {
        if (!parent->isReadOnly()) {
            parent->undo();
        }
        return true;
    } else if (KStandardShortcut::redo().matches(key) != QKeySequence::NoMatch) {
        if (!parent->isReadOnly()) {
            parent->redo();
        }
        return true;
    } else if (KStandardShortcut::deleteWordBack().matches(key) != QKeySequence::NoMatch) {
        if (!parent->isReadOnly()) {
            parent->deleteWordBack();
        }
        return true;
    } else if ( KStandardShortcut::deleteWordForward().matches(key) != QKeySequence::NoMatch) {
        if (!parent->isReadOnly()) {
            parent->deleteWordForward();
        }
        return true;
    } else if ( KStandardShortcut::backwardWord().matches(key) != QKeySequence::NoMatch) {
        QTextCursor cursor = parent->textCursor();
        cursor.movePosition(QTextCursor::PreviousWord);
        parent->setTextCursor(cursor);
        return true;
    } else if (KStandardShortcut::forwardWord().matches(key) != QKeySequence::NoMatch) {
        QTextCursor cursor = parent->textCursor();
        cursor.movePosition(QTextCursor::NextWord);
        parent->setTextCursor(cursor);
        return true;
    } else if ( KStandardShortcut::next().matches(key) != QKeySequence::NoMatch) {
        QTextCursor cursor = parent->textCursor();
        bool moved = false;
        qreal lastY = parent->cursorRect(cursor).bottom();
        qreal distance = 0;
        do {
            qreal y = parent->cursorRect(cursor).bottom();
            distance += qAbs(y - lastY);
            lastY = y;
            moved = cursor.movePosition(QTextCursor::Down);
        } while (moved && distance < parent->viewport()->height());

        if (moved) {
            cursor.movePosition(QTextCursor::Up);
            parent->verticalScrollBar()->triggerAction(QAbstractSlider::SliderPageStepAdd);
        }
        parent->setTextCursor(cursor);
        return true;
    } else if (KStandardShortcut::prior().matches(key) != QKeySequence::NoMatch) {
        QTextCursor cursor = parent->textCursor();
        bool moved = false;
        qreal lastY = parent->cursorRect(cursor).bottom();
        qreal distance = 0;
        do {
            qreal y = parent->cursorRect(cursor).bottom();
            distance += qAbs(y - lastY);
            lastY = y;
            moved = cursor.movePosition(QTextCursor::Up);
        } while (moved && distance < parent->viewport()->height());

        if (moved) {
            cursor.movePosition(QTextCursor::Down);
            parent->verticalScrollBar()->triggerAction(QAbstractSlider::SliderPageStepSub);
        }
        parent->setTextCursor(cursor);
        return true;
    } else if (KStandardShortcut::begin().matches(key) != QKeySequence::NoMatch) {
        QTextCursor cursor = parent->textCursor();
        cursor.movePosition(QTextCursor::Start);
        parent->setTextCursor(cursor);
        return true;
    } else if (KStandardShortcut::end().matches(key) != QKeySequence::NoMatch) {
        QTextCursor cursor = parent->textCursor();
        cursor.movePosition(QTextCursor::End);
        parent->setTextCursor(cursor);
        return true;
    } else if (KStandardShortcut::beginningOfLine().matches(key) != QKeySequence::NoMatch) {
        QTextCursor cursor = parent->textCursor();
        cursor.movePosition(QTextCursor::StartOfLine);
        parent->setTextCursor(cursor);
        return true;
    } else if (KStandardShortcut::endOfLine().matches(key) != QKeySequence::NoMatch) {
        QTextCursor cursor = parent->textCursor();
        cursor.movePosition(QTextCursor::EndOfLine);
        parent->setTextCursor(cursor);
        return true;
    } else if (findReplaceEnabled && KStandardShortcut::find().matches(key) != QKeySequence::NoMatch) {
        parent->slotFind();
        return true;
    } else if (findReplaceEnabled && KStandardShortcut::findNext().matches(key) != QKeySequence::NoMatch) {
        parent->slotFindNext();
        return true;
    } else if (findReplaceEnabled && KStandardShortcut::replace().matches(key) != QKeySequence::NoMatch) {
        if (!parent->isReadOnly()) {
            parent->slotReplace();
        }
        return true;
    } else if (KStandardShortcut::pasteSelection().matches(key) != QKeySequence::NoMatch) {
        QString text = QApplication::clipboard()->text(QClipboard::Selection);
        if (!text.isEmpty()) {
            // TODO: check if this is html? (MiB)
            parent->insertPlainText(text);
        }
        return true;
    }
    return false;
}

void KTextEdit::deleteWordBack()
{
    deleteWord(textCursor(), QTextCursor::PreviousWord);
}       

void KTextEdit::deleteWordForward()
{
    deleteWord(textCursor(), QTextCursor::NextWord);
}

QMenu *KTextEdit::mousePopupMenu()
{
    QMenu *popup = createStandardContextMenu();
    if (!popup) {
        return nullptr;
    }
    connect(
        popup, SIGNAL(triggered(QAction*)),
        this, SLOT(menuActivated(QAction*))
    );

    const bool emptyDocument = document()->isEmpty();

    if (!isReadOnly()) {
        popup->addSeparator();
        d->autoSpellCheckAction = popup->addAction(i18n("Auto Spell Check"));
        d->autoSpellCheckAction->setCheckable( true );
        d->autoSpellCheckAction->setChecked( checkSpellingEnabled());
        popup->addSeparator();
        if (d->showTabAction) {
            d->allowTab = popup->addAction(i18n("Allow Tabulations"));
            d->allowTab->setCheckable(true);
            d->allowTab->setChecked(!tabChangesFocus());
        }
    }

    if (d->findReplaceEnabled) {
        KAction *findAction = KStandardAction::find(this, SLOT(slotFind()), popup);
        KAction *findNextAction = KStandardAction::findNext(this, SLOT(slotFindNext()), popup);
        if (emptyDocument) {
            findAction->setEnabled(false);
            findNextAction->setEnabled(false);
        } else {
            findNextAction->setEnabled(d->find != 0);
        }
        popup->addSeparator();
        popup->addAction(findAction);
        popup->addAction(findNextAction);

        if (!isReadOnly()) {
            KAction *replaceAction = KStandardAction::replace(this, SLOT(slotReplace()), popup);
            if (emptyDocument) {
                replaceAction->setEnabled(false);
            }
            popup->addAction(replaceAction);
        }
    }
    return popup;
}

void KTextEdit::contextMenuEvent(QContextMenuEvent *event)
{
    // Obtain the cursor at the mouse position and the current cursor
    QTextCursor cursorAtMouse = cursorForPosition(event->pos());
    const int mousePos = cursorAtMouse.position();
    QTextCursor cursor = textCursor();

    // Check if the user clicked a selected word
    const bool selectedWordClicked = (
        cursor.hasSelection() &&
        mousePos >= cursor.selectionStart() &&
        mousePos <= cursor.selectionEnd()
    );

    // Get the word under the (mouse-)cursor and see if it is misspelled.
    // Don't include apostrophes at the start/end of the word in the selection.
    QTextCursor wordSelectCursor(cursorAtMouse);
    wordSelectCursor.clearSelection();
    wordSelectCursor.select(QTextCursor::WordUnderCursor);
    QString selectedWord = wordSelectCursor.selectedText();

    bool isMouseCursorInsideWord = true;
    if ((mousePos < wordSelectCursor.selectionStart() ||
        mousePos >= wordSelectCursor.selectionEnd())
        && (selectedWord.length() > 1)) {
        isMouseCursorInsideWord = false;
    }

    // Clear the selection again, we re-select it below (without the apostrophes).
    wordSelectCursor.setPosition(wordSelectCursor.position()-selectedWord.size());
    if (selectedWord.startsWith('\'') || selectedWord.startsWith('\"')) {
        selectedWord = selectedWord.right(selectedWord.size() - 1);
        wordSelectCursor.movePosition(QTextCursor::NextCharacter, QTextCursor::MoveAnchor);
    }
    if (selectedWord.endsWith('\'') || selectedWord.endsWith('\"')) {
        selectedWord.chop(1);
    }

    wordSelectCursor.movePosition(
        QTextCursor::NextCharacter,
        QTextCursor::KeepAnchor, selectedWord.size()
    );

    const bool wordIsMisspelled = (
        isMouseCursorInsideWord &&
        checkSpellingEnabled() &&
        !selectedWord.isEmpty() &&
        highlighter() &&
        highlighter()->isWordMisspelled(selectedWord)
    );

    // If the user clicked a selected word, do nothing.
    // If the user clicked somewhere else, move the cursor there.
    // If the user clicked on a misspelled word, select that word.
    // Same behavior as in OpenOffice Writer.
    if (!selectedWordClicked) {
        if (wordIsMisspelled) {
            setTextCursor(wordSelectCursor);
        } else {
            setTextCursor(cursorAtMouse);
        }
        cursor = textCursor();
    }

    // Use standard context menu for already selected words, correctly spelled
    // words and words inside quotes.
    if (!wordIsMisspelled || selectedWordClicked) {
        QMenu *popup = mousePopupMenu();
        if (popup) {
            aboutToShowContextMenu(popup);
            popup->exec(event->globalPos());
            delete popup;
        }
    } else {
        QMenu menu; //don't use KMenu here we don't want auto management accelerator

        //Add the suggestions to the menu
        const QStringList reps = highlighter()->suggestionsForWord(selectedWord);
        if (reps.isEmpty()) {
            QAction *suggestionsAction = menu.addAction(i18n("No suggestions for %1", selectedWord));
            suggestionsAction->setEnabled(false);
        } else {
            foreach (const QString &rep, reps) {
                menu.addAction(rep);
            }
        }

        menu.addSeparator();

        QAction* ignoreAction = menu.addAction(i18n("Ignore"));
        QAction* addToDictAction = menu.addAction(i18n("Add to Dictionary"));
        //Execute the popup inline
        const QAction *selectedAction = menu.exec(event->globalPos());

        if (selectedAction) {
            Q_ASSERT(cursor.selectedText() == selectedWord);

            if (selectedAction == ignoreAction) {
                highlighter()->ignoreWord(selectedWord);
                highlighter()->rehighlight();
            } else if (selectedAction == addToDictAction) {
                highlighter()->addWordToDictionary(selectedWord);
                highlighter()->rehighlight();
            } else {
                // Other actions can only be one of the suggested words
                const QString replacement = selectedAction->text();
                Q_ASSERT(reps.contains(replacement));
                cursor.insertText(replacement);
                setTextCursor(cursor);
            }
        }
    }
}

KSpellHighlighter* KTextEdit::highlighter() const
{
    return d->highlighter;
}

void KTextEdit::setHighlighter(KSpellHighlighter *highLighter)
{
    d->highlighter = highLighter;
}

void KTextEdit::setCheckSpellingEnabled(bool check)
{
    if (check == d->checkSpellingEnabled) {
        return;
    }

    // From the above statment we know know that if we're turning checking
    // on that we need to create a new highlighter and if we're turning it
    // off we should remove the old one.

    d->checkSpellingEnabled = check;
    if (check) {
        if (!isReadOnly() && !d->highlighter) {
            d->highlighter = new KSpellHighlighter(KGlobal::config().data(), this);
        }
        if (d->highlighter) {
            d->highlighter->setDocument(document());
        }
    } else {
        if (d->highlighter) {
            d->highlighter->setDocument(nullptr);
        }
    }

    emit checkSpellingChanged(check);
}

bool KTextEdit::checkSpellingEnabled() const
{
    return d->checkSpellingEnabled;
}

void KTextEdit::setReadOnly(bool readOnly)
{
    if (readOnly == isReadOnly()) {
        return;
    }

    if (readOnly) {
        d->customPalette = testAttribute(Qt::WA_SetPalette);
        QPalette p = palette();
        QColor color = p.color(QPalette::Disabled, QPalette::Background);
        p.setColor(QPalette::Base, color);
        p.setColor(QPalette::Background, color);
        setPalette(p);
    } else {
        if (d->customPalette && testAttribute(Qt::WA_SetPalette)) {
            QPalette p = palette();
            QColor color = p.color(QPalette::Normal, QPalette::Base);
            p.setColor(QPalette::Base, color);
            p.setColor(QPalette::Background, color);
            setPalette(p);
        } else {
            setPalette(QPalette());
        }
    }

    QTextEdit::setReadOnly(readOnly);

    setCheckSpellingEnabled(!readOnly);
}

void KTextEdit::highlightWord(int length, int pos)
{
    QTextCursor cursor(document());
    cursor.setPosition(pos);
    cursor.setPosition(pos+length,QTextCursor::KeepAnchor);
    setTextCursor (cursor);
    ensureCursorVisible();
}

void KTextEdit::replace()
{
    if (document()->isEmpty()) {
        // saves having to track the text changes
        return;
    }
    if (d->repDlg) {
        KWindowSystem::activateWindow(d->repDlg->winId());
    } else {
        d->repDlg = new KReplaceDialog(this, 0, QStringList(), QStringList(), false);
        connect(d->repDlg, SIGNAL(okClicked()), this, SLOT(slotDoReplace()));
    }
    d->repDlg->show();
}

void KTextEdit::slotDoReplace()
{
    if (!d->repDlg) {
        // Should really assert()
        return;
    }

    if (d->repDlg->pattern().isEmpty()) {
        delete d->replace;
        d->replace = 0;
        ensureCursorVisible();
        return;
    }

    delete d->replace;
    d->replace = new KReplace(d->repDlg->pattern(), d->repDlg->replacement(), d->repDlg->options(), this);
    d->repIndex = 0;
    if (d->replace->options() & KFind::FromCursor || d->replace->options() & KFind::FindBackwards) {
        d->repIndex = textCursor().anchor();
    }

    // Connect highlight signal to code which handles highlighting
    // of found text.
    connect(
        d->replace, SIGNAL(highlight(QString,int,int)),
        this, SLOT(slotFindHighlight(QString,int,int))
    );
    connect(d->replace, SIGNAL(findNext()), this, SLOT(slotReplaceNext()));
    connect(
        d->replace, SIGNAL(replace(QString,int,int,int)),
        this, SLOT(slotReplaceText(QString,int,int,int))
    );

    d->repDlg->close();
    slotReplaceNext();
}

void KTextEdit::slotReplaceNext()
{
    if (!d->replace) {
        return;
    }

    d->lastReplacedPosition = -1;
    if (!(d->replace->options() & KReplaceDialog::PromptOnReplace)) {
        textCursor().beginEditBlock(); // #48541
        viewport()->setUpdatesEnabled(false);
    }

    KFind::Result res = KFind::NoMatch;

    if (d->replace->needData()) {
        d->replace->setData(toPlainText(), d->repIndex);
    }
    res = d->replace->replace();
    if (!(d->replace->options() & KReplaceDialog::PromptOnReplace)) {
        textCursor().endEditBlock(); // #48541
        if (d->lastReplacedPosition >= 0) {
            QTextCursor tc = textCursor();
            tc.setPosition(d->lastReplacedPosition);
            setTextCursor(tc);
            ensureCursorVisible();
        }

        viewport()->setUpdatesEnabled(true);
        viewport()->update();
    }

    if (res == KFind::NoMatch) {
        d->replace->displayFinalDialog();
        d->replace->disconnect(this);
        d->replace->deleteLater(); // in a slot connected to m_replace, don't delete it right away
        d->replace = 0;
        ensureCursorVisible();
        // or if ( m_replace->shouldRestart() ) { reinit (w/o FromCursor) and call slotReplaceNext(); }
    } else {
        // m_replace->closeReplaceNextDialog();
    }
}

void KTextEdit::slotDoFind()
{
    if (!d->findDlg) {
        // Should really assert()
        return;
    }
    if (d->findDlg->pattern().isEmpty()) {
        delete d->find;
        d->find = nullptr;
        return;
    }
    delete d->find;
    d->find = new KFind(d->findDlg->pattern(), d->findDlg->options(), this);
    d->findIndex = 0;
    if (d->find->options() & KFind::FromCursor || d->find->options() & KFind::FindBackwards) {
        d->findIndex = textCursor().anchor();
    }

    // Connect highlight signal to code which handles highlighting
    // of found text.
    connect(
        d->find, SIGNAL(highlight(QString,int,int)),
        this, SLOT(slotFindHighlight(QString,int,int))
    );
    connect(d->find, SIGNAL(findNext()), this, SLOT(slotFindNext()));

    d->findDlg->close();
    d->find->closeFindNextDialog();
    slotFindNext();
}

void KTextEdit::slotFindNext()
{
    if (!d->find) {
        return;
    }
    if (document()->isEmpty()) {
        d->find->disconnect(this);
        d->find->deleteLater(); // in a slot connected to m_find, don't delete right away
        d->find = nullptr;
        return;
    }

    KFind::Result res = KFind::NoMatch;
    if (d->find->needData()) {
        d->find->setData(toPlainText(), d->findIndex);
    }
    res = d->find->find();

    if (res == KFind::NoMatch) {
        d->find->displayFinalDialog();
        d->find->disconnect(this);
        d->find->deleteLater(); // in a slot connected to m_find, don't delete right away
        d->find = nullptr;
        // or if ( m_find->shouldRestart() ) { reinit (w/o FromCursor) and call slotFindNext(); }
    } else {
        // m_find->closeFindNextDialog();
    }
}

void KTextEdit::slotFind()
{
    if (document()->isEmpty()) {
        // saves having to track the text changes
        return;
    }
    if (d->findDlg) {
        KWindowSystem::activateWindow(d->findDlg->winId());
    } else {
        d->findDlg = new KFindDialog(this);
        connect( d->findDlg, SIGNAL(okClicked()), this, SLOT(slotDoFind()));
    }
    d->findDlg->show();
}


void KTextEdit::slotReplace()
{
    if (document()->isEmpty()) {
        // saves having to track the text changes
        return;
    }
    if (d->repDlg) {
        KWindowSystem::activateWindow(d->repDlg->winId());
    } else {
        d->repDlg = new KReplaceDialog(this, 0,  QStringList(), QStringList(), false);
        connect( d->repDlg, SIGNAL(okClicked()), this, SLOT(slotDoReplace()));
    }
    d->repDlg->show();
}

void KTextEdit::enableFindReplace(bool enabled)
{
    d->findReplaceEnabled = enabled;
}

void KTextEdit::showTabAction(bool show)
{
    d->showTabAction = show;
}

bool KTextEdit::Private::overrideShortcut(const QKeyEvent *event)
{
    const QKeySequence key = QKeySequence(event->key() | event->modifiers());

    if (KStandardShortcut::copy().matches(key) != QKeySequence::NoMatch) {
        return true;
    } else if (KStandardShortcut::paste().matches(key) != QKeySequence::NoMatch) {
        return true;
    } else if (KStandardShortcut::cut().matches(key) != QKeySequence::NoMatch) {
        return true;
    } else if (KStandardShortcut::undo().matches(key) != QKeySequence::NoMatch) {
        return true;
    } else if (KStandardShortcut::redo().matches(key) != QKeySequence::NoMatch) {
        return true;
    } else if ( KStandardShortcut::deleteWordBack().matches(key) != QKeySequence::NoMatch) {
        return true;
    } else if (KStandardShortcut::deleteWordForward().matches(key) != QKeySequence::NoMatch) {
        return true;
    } else if (KStandardShortcut::backwardWord().matches(key) != QKeySequence::NoMatch) {
        return true;
    } else if (KStandardShortcut::forwardWord().matches(key) != QKeySequence::NoMatch) {
        return true;
    } else if (KStandardShortcut::next().matches(key) != QKeySequence::NoMatch) {
        return true;
    } else if (KStandardShortcut::prior().matches(key) != QKeySequence::NoMatch) {
        return true;
    } else if (KStandardShortcut::begin().matches(key) != QKeySequence::NoMatch) {
        return true;
    } else if (KStandardShortcut::end().matches(key) != QKeySequence::NoMatch) {
        return true;
    } else if (KStandardShortcut::beginningOfLine().matches(key) != QKeySequence::NoMatch) {
        return true;
    } else if (KStandardShortcut::endOfLine().matches(key) != QKeySequence::NoMatch) {
        return true;
    } else if (KStandardShortcut::pasteSelection().matches(key) != QKeySequence::NoMatch) {
        return true;
    } else if (findReplaceEnabled && KStandardShortcut::find().matches(key) != QKeySequence::NoMatch) {
        return true;
    } else if (findReplaceEnabled && KStandardShortcut::findNext().matches(key) != QKeySequence::NoMatch) {
        return true;
    } else if (findReplaceEnabled && KStandardShortcut::replace().matches(key) != QKeySequence::NoMatch) {
        return true;
    } else if (event->matches(QKeySequence::SelectAll)) { // currently missing in QTextEdit
        return true;
    } else if (event->modifiers() == Qt::ControlModifier &&
        (event->key() == Qt::Key_Return || event->key() == Qt::Key_Enter) &&
        qobject_cast<KDialog*>(parent->window())) {
        // ignore Ctrl-Return so that KDialogs can close the dialog
        return true;
    }
    return false;
}

void KTextEdit::keyPressEvent(QKeyEvent *event)
{
    if (d->handleShortcut(event)) {
        event->accept();
    } else if (event->modifiers() == Qt::ControlModifier &&
        (event->key() == Qt::Key_Return || event->key() == Qt::Key_Enter) &&
        qobject_cast<KDialog*>(window()) ) {
        event->ignore();
    } else {
        QTextEdit::keyPressEvent(event);
    }
}

void KTextEdit::setClickMessage(const QString &msg)
{
    if (msg != d->clickMessage) {
        if (!d->clickMessage.isEmpty()) {
            viewport()->update(d->clickMessageRect());
        }
        d->clickMessage = msg;
        if (!d->clickMessage.isEmpty()) {
            viewport()->update(d->clickMessageRect());
        }
    }
}

QString KTextEdit::clickMessage() const
{
    return d->clickMessage;
}

void KTextEdit::paintEvent(QPaintEvent *ev)
{
    QTextEdit::paintEvent(ev);

    if (!d->clickMessage.isEmpty() && document()->isEmpty()) {
        QPainter p(viewport());

        QFont f = font();
        f.setItalic(d->italicizePlaceholder);
        p.setFont(f);

        QColor color(palette().color(viewport()->foregroundRole()));
        color.setAlphaF(0.5);
        p.setPen(color);

        p.drawText(d->clickMessageRect(), Qt::AlignTop | Qt::TextWordWrap, d->clickMessage);
    }
}

#include "moc_ktextedit.cpp"