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/****************************************************************************
**
** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtGui module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qclipboard.h"
#ifndef QT_NO_CLIPBOARD
#include "qapplication.h"
#include "qapplication_p.h"
#include "qeventloop.h"
#include "qwidget.h"
#include "qevent.h"
#include "qmime.h"
#include "qt_windows.h"
#include "qdnd_p.h"
#include <private/qwidget_p.h>
QT_BEGIN_NAMESPACE
#if defined(Q_OS_WINCE)
QT_BEGIN_INCLUDE_NAMESPACE
#include "qguifunctions_wince.h"
QT_END_INCLUDE_NAMESPACE
HRESULT QtCeGetClipboard(IDataObject** obj);
HRESULT QtCeSetClipboard(IDataObject* obj);
void QtCeFlushClipboard();
#define OleGetClipboard QtCeGetClipboard
#define OleSetClipboard QtCeSetClipboard
#define OleFlushClipboard QtCeFlushClipboard
#endif
class QClipboardWatcher : public QInternalMimeData {
public:
QClipboardWatcher()
: QInternalMimeData()
{
}
bool hasFormat_sys(const QString &mimetype) const;
QStringList formats_sys() const;
QVariant retrieveData_sys(const QString &mimetype, QVariant::Type preferredType) const;
};
bool QClipboardWatcher::hasFormat_sys(const QString &mime) const
{
IDataObject * pDataObj = 0;
if (OleGetClipboard(&pDataObj) != S_OK && !pDataObj) // Sanity
return false;
bool has = QWindowsMime::converterToMime(mime, pDataObj) != 0;
pDataObj->Release();
return has;
}
QStringList QClipboardWatcher::formats_sys() const
{
QStringList fmts;
IDataObject * pDataObj = 0;
if (OleGetClipboard(&pDataObj) != S_OK && !pDataObj) // Sanity
return QStringList();
fmts = QWindowsMime::allMimesForFormats(pDataObj);
pDataObj->Release();
return fmts;
}
QVariant QClipboardWatcher::retrieveData_sys(const QString &mimeType, QVariant::Type type) const
{
QVariant result;
IDataObject * pDataObj = 0;
if (OleGetClipboard(&pDataObj) != S_OK && !pDataObj) // Sanity
return result;
QWindowsMime *converter = QWindowsMime::converterToMime(mimeType, pDataObj);
if (converter)
result = converter->convertToMime(mimeType, pDataObj, type);
pDataObj->Release();
return result;
}
class QClipboardData
{
public:
QClipboardData()
: iData(0)
, nextClipboardViewer(0)
{
clipBoardViewer = new QWidget();
clipBoardViewer->createWinId();
clipBoardViewer->setObjectName(QLatin1String("internal clipboard owner"));
// We don't need this internal widget to appear in QApplication::topLevelWidgets()
if (QWidgetPrivate::allWidgets)
QWidgetPrivate::allWidgets->remove(clipBoardViewer);
}
~QClipboardData()
{
Q_ASSERT(clipBoardViewer->testAttribute(Qt::WA_WState_Created));
ChangeClipboardChain(clipBoardViewer->internalWinId(), nextClipboardViewer);
delete clipBoardViewer;
releaseIData();
}
void releaseIData()
{
if (iData) {
delete iData->mimeData();
iData->releaseQt();
iData->Release();
iData = 0;
}
}
QOleDataObject * iData;
QWidget *clipBoardViewer;
HWND nextClipboardViewer;
QClipboardWatcher watcher;
};
static QClipboardData *ptrClipboardData = 0;
static QClipboardData *clipboardData()
{
if (ptrClipboardData == 0) {
ptrClipboardData = new QClipboardData;
// this needs to be done here to avoid recursion
Q_ASSERT(ptrClipboardData->clipBoardViewer->testAttribute(Qt::WA_WState_Created));
ptrClipboardData->nextClipboardViewer = SetClipboardViewer(ptrClipboardData->clipBoardViewer->internalWinId());
}
return ptrClipboardData;
}
static void cleanupClipboardData()
{
delete ptrClipboardData;
ptrClipboardData = 0;
}
#if defined(Q_OS_WINCE)
HRESULT QtCeGetClipboard(IDataObject** obj)
{
HWND owner = ptrClipboardData->clipBoardViewer->internalWinId();
if (!OpenClipboard(owner))
return !S_OK;
if (!IsClipboardFormatAvailable(CF_TEXT) && !IsClipboardFormatAvailable(CF_UNICODETEXT))
return !S_OK;
HANDLE clipData = GetClipboardData(CF_TEXT);
QString clipText;
if (clipData == 0) {
clipData = GetClipboardData(CF_UNICODETEXT);
if (clipData != 0)
clipText = QString::fromWCharArray((wchar_t *)clipData);
} else {
clipText = QString::fromLatin1((const char*)clipData);
}
QMimeData *mimeData = new QMimeData();
mimeData->setText(clipText);
QOleDataObject* data = new QOleDataObject(mimeData);
*obj = data;
CloseClipboard();
return S_OK;
}
HRESULT QtCeSetClipboard(IDataObject* obj)
{
HWND owner = ptrClipboardData->clipBoardViewer->internalWinId();
if (!OpenClipboard(owner))
return !S_OK;
bool result = false;
if (obj == 0) {
result = true;
EmptyClipboard();
CloseClipboard();
} else {
QOleDataObject* qobj = static_cast<QOleDataObject*>(obj);
const QMimeData* data = qobj->mimeData();
if (data->hasText()) {
EmptyClipboard();
result = SetClipboardData(CF_UNICODETEXT, wcsdup(reinterpret_cast<const wchar_t *> (data->text().utf16()))) != NULL;
CloseClipboard();
result = true;
}
}
return result ? S_OK : !S_OK;
}
void QtCeFlushClipboard() { }
#endif
QClipboard::~QClipboard()
{
cleanupClipboardData();
}
void QClipboard::setMimeData(QMimeData *src, Mode mode)
{
if (mode != Clipboard)
return;
QClipboardData *d = clipboardData();
if (!(d->iData && d->iData->mimeData() == src)) {
d->releaseIData();
d->iData = new QOleDataObject(src);
}
if (OleSetClipboard(d->iData) != S_OK) {
d->releaseIData();
qErrnoWarning("QClipboard::setMimeData: Failed to set data on clipboard");
return;
}
#if defined(Q_OS_WINCE)
// As WinCE does not support notifications we send the signal here
// We will get no event when the clipboard changes outside...
emit dataChanged();
emit changed(Clipboard);
#endif
}
void QClipboard::clear(Mode mode)
{
if (mode != Clipboard) return;
QClipboardData *d = clipboardData();
d->releaseIData();
if (OleSetClipboard(0) != S_OK) {
qErrnoWarning("QClipboard::clear: Failed to clear data on clipboard");
return;
}
#if defined(Q_OS_WINCE)
// As WinCE does not support notifications we send the signal here
// We will get no event when the clipboard changes outside...
emit dataChanged();
emit changed(Clipboard);
#endif
}
bool QClipboard::event(QEvent *e)
{
if (e->type() != QEvent::Clipboard)
return QObject::event(e);
QClipboardData *d = clipboardData();
MSG *m = (MSG *)((QClipboardEvent*)e)->data();
if (!m) {
// this is sent to render all formats at app shut down
if (ownsClipboard()) {
OleFlushClipboard();
d->releaseIData();
}
return true;
}
bool propagate = false;
if (m->message == WM_CHANGECBCHAIN) {
if ((HWND)m->wParam == d->nextClipboardViewer)
d->nextClipboardViewer = (HWND)m->lParam;
else
propagate = true;
} else if (m->message == WM_DRAWCLIPBOARD) {
emitChanged(QClipboard::Clipboard);
if (!ownsClipboard() && d->iData)
// clean up the clipboard object if we no longer own the clipboard
d->releaseIData();
propagate = true;
}
if (propagate && d->nextClipboardViewer) {
SendMessage(d->nextClipboardViewer, m->message, m->wParam, m->lParam);
}
return true;
}
void QClipboard::connectNotify(const char *signal)
{
if (qstrcmp(signal,SIGNAL(dataChanged())) == 0) {
// ensure we are up and running but block signals so the dataChange signal
// is not emitted while being connected to.
bool blocked = blockSignals(true);
QClipboardData *d = clipboardData();
blockSignals(blocked);
Q_UNUSED(d);
}
}
const QMimeData *QClipboard::mimeData(Mode mode) const
{
if (mode != Clipboard)
return 0;
QClipboardData *data = clipboardData();
// sort cut for local copy / paste
if (ownsClipboard() && data->iData->mimeData())
return data->iData->mimeData();
return &data->watcher;
}
bool QClipboard::supportsMode(Mode mode) const
{
return (mode == Clipboard);
}
bool QClipboard::ownsMode(Mode mode) const
{
if (mode == Clipboard) {
QClipboardData *d = clipboardData();
#if !defined(Q_OS_WINCE)
return d->iData && OleIsCurrentClipboard(d->iData) == S_OK;
#else
return d->iData && GetClipboardOwner() == d->clipBoardViewer->internalWinId();
#endif
} else {
return false;
}
}
void QClipboard::ownerDestroyed()
{
}
QT_END_NAMESPACE
#endif // QT_NO_CLIPBOARD
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