src/gui/kernel/qclipboard_qws.cpp
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Fri, 19 Feb 2010 23:40:16 +0200
branchRCL_3
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Revision: 201003 Kit: 201007
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/****************************************************************************
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**
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** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
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** All rights reserved.
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** Contact: Nokia Corporation (qt-info@nokia.com)
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**
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** This file is part of the QtGui module of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** No Commercial Usage
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** This file contains pre-release code and may not be distributed.
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** You may use this file in accordance with the terms and conditions
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** contained in the Technology Preview License Agreement accompanying
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** this package.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL included in the
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** packaging of this file.  Please review the following information to
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** ensure the GNU Lesser General Public License version 2.1 requirements
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** In addition, as a special exception, Nokia gives you certain additional
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** rights.  These rights are described in the Nokia Qt LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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** If you have questions regarding the use of this file, please contact
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** Nokia at qt-info@nokia.com.
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**
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**
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**
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**
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**
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**
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**
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include "qclipboard.h"
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#ifndef QT_NO_CLIPBOARD
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#include "qapplication.h"
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#include "qbitmap.h"
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#include "qdatetime.h"
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#include "qbuffer.h"
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#include "qwidget.h"
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#include "qevent.h"
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#include <qwsdisplay_qws.h>
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#include <qwsproperty_qws.h>
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#include <qwsevent_qws.h>
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QT_BEGIN_NAMESPACE
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QT_USE_NAMESPACE
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/*****************************************************************************
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  Internal QClipboard functions for Qt for Embedded Linux
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 *****************************************************************************/
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static const int TextClipboard=424242;
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static bool init = false;
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static inline void qwsInitClipboard()
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{
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    //### this should go into QWSServer; it only needs to happen once.
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    if( !init ) {
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	QPaintDevice::qwsDisplay()->addProperty(0, TextClipboard);
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	init = true;
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    }
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}
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static QString qwsClipboardText()
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{
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    char * data;
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    int len;
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    qwsInitClipboard();
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    if( !QPaintDevice::qwsDisplay()->getProperty(0, TextClipboard, data, len) ) {
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//        qDebug("Property received: %d bytes", len);
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    }
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    QString s((const QChar*)data, len/sizeof(QChar));
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 //       qDebug("Property received: '%s'", s.toAscii().constData());
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    delete[] data;
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    return s;
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}
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static void qwsSetClipboardText(const QString& s)
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{
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    qwsInitClipboard();
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  //  qDebug("qwsSetClipboardText( %s )", s.toAscii().data());
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    int len =  s.length()*sizeof(QChar);
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    QByteArray ba((const char*)s.unicode(), len);
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    QPaintDevice::qwsDisplay()->
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        setProperty(0, TextClipboard, QWSPropertyManager::PropReplace, ba);
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}
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class QClipboardData
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{
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public:
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    QClipboardData();
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   ~QClipboardData();
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    void setSource(QMimeData* s)
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    {
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        if (s == src)
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            return;
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        delete src;
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        src = s;
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    }
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    QMimeData* source()
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        { return src; }
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#if 0
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    void addTransferredPixmap(QPixmap pm)
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        { /* TODO: queue them */
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            transferred[tindex] = pm;
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            tindex=(tindex+1)%2;
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        }
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    void clearTransfers()
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        {
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            transferred[0] = QPixmap();
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            transferred[1] = QPixmap();
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        }
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#endif
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    void clear();
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private:
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    QMimeData* src;
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#if 0
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    QPixmap transferred[2];
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    int tindex;
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#endif
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};
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QClipboardData::QClipboardData()
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{
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    src = 0;
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#if 0
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    tindex=0;
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#endif
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}
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QClipboardData::~QClipboardData()
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{
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    delete src;
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}
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void QClipboardData::clear()
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{
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    delete src;
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    src = 0;
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}
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static QClipboardData *internalCbData = 0;
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static void cleanupClipboardData()
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{
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    delete internalCbData;
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    internalCbData = 0;
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}
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static QClipboardData *clipboardData()
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{
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    if (internalCbData == 0) {
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        internalCbData = new QClipboardData;
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        qAddPostRoutine(cleanupClipboardData);
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    }
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    return internalCbData;
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}
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/*****************************************************************************
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  QClipboard member functions for FB.
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 *****************************************************************************/
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#if 0
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QString QClipboard::text() const
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{
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    return qwsClipboardText();
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}
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void QClipboard::setText(const QString &text)
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{
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    qwsSetClipboardText(text);
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}
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QString QClipboard::text(QString& subtype) const
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{
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    QString r;
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    if (subtype == "plain")
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        r = text();
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    return r;
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}
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#endif
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void QClipboard::clear(Mode mode)
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{
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    setText(QString(), mode);
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}
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bool QClipboard::event(QEvent *e)
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{
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    static bool recursionWatch = false;
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    if (e->type() != QEvent::Clipboard || recursionWatch)
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        return QObject::event(e);
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    recursionWatch = true;
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    QWSPropertyNotifyEvent *event = (QWSPropertyNotifyEvent *)(((QClipboardEvent *)e)->data());
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    if (event && event->simpleData.state == QWSPropertyNotifyEvent::PropertyNewValue) {
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	QClipboardData *d = clipboardData();
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	QString t = qwsClipboardText();
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	if( (d->source() == 0 && !t.isEmpty()) || (d->source() != 0 && d->source()->text() != t) ) {
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	    if( !d->source() )
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		d->setSource(new QMimeData);
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	    d->source()->setText( t );
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	    emitChanged(QClipboard::Clipboard);
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	}
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    }
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    recursionWatch = false;
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    return true;
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}
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const QMimeData* QClipboard::mimeData(Mode mode) const
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{
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    if (mode != Clipboard) return 0;
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    QClipboardData *d = clipboardData();
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    // Try and get data from QWSProperty if no mime data has been set on us.
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    if( !d->source() ) {
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	QString t = qwsClipboardText();
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	if( !t.isEmpty() ) {
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	    QMimeData* nd = new QMimeData;
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	    nd->setText( t );
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	    d->setSource( nd );
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	}
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    }
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    return d->source();
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}
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void QClipboard::setMimeData(QMimeData* src, Mode mode)
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{
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    if (mode != Clipboard) return;
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    QClipboardData *d = clipboardData();
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    /* Propagate text data to other QWSClients */
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    QString newText;
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    if( src != 0 )
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	newText = src->text();
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    QString oldText;
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    if( d->source() != 0 )
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	oldText = d->source()->text();
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    d->setSource(src);
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    if( oldText != newText ) {
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	if( d->source() == 0 ) {
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	    qwsSetClipboardText( QString() );
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	} else {
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	    qwsSetClipboardText( d->source()->text() );
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	}
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    }
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    emitChanged(QClipboard::Clipboard);
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}
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bool QClipboard::supportsMode(Mode mode) const
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{
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    return (mode == Clipboard);
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}
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bool QClipboard::ownsMode(Mode mode) const
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{
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    if (mode == Clipboard)
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        qWarning("QClipboard::ownsClipboard: UNIMPLEMENTED!");
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    return false;
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}
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void QClipboard::connectNotify( const char * )
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{
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}
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void QClipboard::ownerDestroyed()
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{
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}
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#endif // QT_NO_CLIPBOARD
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QT_END_NAMESPACE