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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
*/
#include <QtClipboard.hxx>
#include <QtClipboard.moc>
#include <cppuhelper/supportsservice.hxx>
#include <sal/log.hxx>
#include <QtWidgets/QApplication>
#include <QtInstance.hxx>
#include <QtTransferable.hxx>
#include <QtTools.hxx>
#include <cassert>
#include <map>
#include <utility>
QtClipboard::QtClipboard(OUString aModeString, const QClipboard::Mode aMode)
: cppu::WeakComponentImplHelper<css::datatransfer::clipboard::XSystemClipboard,
css::datatransfer::clipboard::XFlushableClipboard,
XServiceInfo>(m_aMutex)
, m_aClipboardName(std::move(aModeString))
, m_aClipboardMode(aMode)
, m_bOwnClipboardChange(false)
, m_bDoClear(false)
{
assert(isSupported(m_aClipboardMode));
// DirectConnection guarantees the changed slot runs in the same thread as the QClipboard
connect(QApplication::clipboard(), &QClipboard::changed, this, &QtClipboard::handleChanged,
Qt::DirectConnection);
// explicitly queue an event, so we can eventually ignore it
connect(this, &QtClipboard::clearClipboard, this, &QtClipboard::handleClearClipboard,
Qt::QueuedConnection);
}
css::uno::Reference<css::uno::XInterface> QtClipboard::create(const OUString& aModeString)
{
static const std::map<OUString, QClipboard::Mode> aNameToClipboardMap
= { { "CLIPBOARD", QClipboard::Clipboard }, { "PRIMARY", QClipboard::Selection } };
assert(QApplication::clipboard()->thread() == qApp->thread());
auto iter = aNameToClipboardMap.find(aModeString);
if (iter != aNameToClipboardMap.end() && isSupported(iter->second))
return static_cast<cppu::OWeakObject*>(new QtClipboard(aModeString, iter->second));
SAL_WARN("vcl.qt", "Ignoring unrecognized clipboard type: '" << aModeString << "'");
return css::uno::Reference<css::uno::XInterface>();
}
void QtClipboard::flushClipboard()
{
auto* pSalInst(GetQtInstance());
SolarMutexGuard g;
pSalInst->RunInMainThread([this]() {
if (!isOwner(m_aClipboardMode))
return;
QClipboard* pClipboard = QApplication::clipboard();
const QtMimeData* pQtMimeData
= dynamic_cast<const QtMimeData*>(pClipboard->mimeData(m_aClipboardMode));
assert(pQtMimeData);
QMimeData* pMimeCopy = nullptr;
if (pQtMimeData && pQtMimeData->deepCopy(&pMimeCopy))
{
m_bOwnClipboardChange = true;
pClipboard->setMimeData(pMimeCopy, m_aClipboardMode);
m_bOwnClipboardChange = false;
}
});
}
css::uno::Reference<css::datatransfer::XTransferable> QtClipboard::getContents()
{
#if defined(EMSCRIPTEN)
static QMimeData aMimeData;
#endif
osl::MutexGuard aGuard(m_aMutex);
// if we're the owner, we might have the XTransferable from setContents. but
// maybe a non-LO clipboard change from within LO, like some C'n'P in the
// QFileDialog, might have invalidated m_aContents, so we need to check it too.
if (isOwner(m_aClipboardMode) && m_aContents.is())
return m_aContents;
// check if we can still use the shared QtClipboardTransferable
const QMimeData* pMimeData = QApplication::clipboard()->mimeData(m_aClipboardMode);
#if defined(EMSCRIPTEN)
if (!pMimeData)
pMimeData = &aMimeData;
#endif
if (m_aContents.is())
{
const auto* pTrans = dynamic_cast<QtClipboardTransferable*>(m_aContents.get());
assert(pTrans);
if (pTrans && pTrans->mimeData() == pMimeData)
return m_aContents;
}
m_aContents = new QtClipboardTransferable(m_aClipboardMode, pMimeData);
return m_aContents;
}
void QtClipboard::handleClearClipboard()
{
if (!m_bDoClear)
return;
QApplication::clipboard()->clear(m_aClipboardMode);
}
void QtClipboard::setContents(
const css::uno::Reference<css::datatransfer::XTransferable>& xTrans,
const css::uno::Reference<css::datatransfer::clipboard::XClipboardOwner>& xClipboardOwner)
{
// it's actually possible to get a non-empty xTrans and an empty xClipboardOwner!
osl::ClearableMutexGuard aGuard(m_aMutex);
css::uno::Reference<css::datatransfer::clipboard::XClipboardOwner> xOldOwner(m_aOwner);
css::uno::Reference<css::datatransfer::XTransferable> xOldContents(m_aContents);
m_aContents = xTrans;
m_aOwner = xClipboardOwner;
m_bDoClear = !m_aContents.is();
if (!m_bDoClear)
{
m_bOwnClipboardChange = true;
QApplication::clipboard()->setMimeData(new QtMimeData(m_aContents), m_aClipboardMode);
m_bOwnClipboardChange = false;
}
else
{
assert(!m_aOwner.is());
Q_EMIT clearClipboard();
}
aGuard.clear();
// we have to notify only an owner change, since handleChanged can't
// access the previous owner anymore and can just handle lost ownership.
if (xOldOwner.is() && xOldOwner != xClipboardOwner)
xOldOwner->lostOwnership(this, xOldContents);
}
void QtClipboard::handleChanged(QClipboard::Mode aMode)
{
if (aMode != m_aClipboardMode)
return;
osl::ClearableMutexGuard aGuard(m_aMutex);
// QtWayland will send a second change notification (seemingly without any
// trigger). And any C'n'P operation in the Qt file picker emits a signal,
// with LO still holding the clipboard ownership, but internally having lost
// it. So ignore any signal, which still delivers the internal QtMimeData
// as the clipboard content and is no "advertised" change.
if (!m_bOwnClipboardChange && isOwner(aMode)
&& dynamic_cast<const QtMimeData*>(QApplication::clipboard()->mimeData(aMode)))
return;
css::uno::Reference<css::datatransfer::clipboard::XClipboardOwner> xOldOwner(m_aOwner);
css::uno::Reference<css::datatransfer::XTransferable> xOldContents(m_aContents);
// ownership change from LO POV is handled in setContents
if (!m_bOwnClipboardChange)
{
m_aContents.clear();
m_aOwner.clear();
}
std::vector<css::uno::Reference<css::datatransfer::clipboard::XClipboardListener>> aListeners(
m_aListeners);
css::datatransfer::clipboard::ClipboardEvent aEv;
aEv.Contents = getContents();
aGuard.clear();
if (!m_bOwnClipboardChange && xOldOwner.is())
xOldOwner->lostOwnership(this, xOldContents);
for (auto const& listener : aListeners)
listener->changedContents(aEv);
}
OUString QtClipboard::getImplementationName() { return "com.sun.star.datatransfer.QtClipboard"; }
css::uno::Sequence<OUString> QtClipboard::getSupportedServiceNames()
{
return { "com.sun.star.datatransfer.clipboard.SystemClipboard" };
}
sal_Bool QtClipboard::supportsService(const OUString& ServiceName)
{
return cppu::supportsService(this, ServiceName);
}
OUString QtClipboard::getName() { return m_aClipboardName; }
sal_Int8 QtClipboard::getRenderingCapabilities() { return 0; }
void QtClipboard::addClipboardListener(
const css::uno::Reference<css::datatransfer::clipboard::XClipboardListener>& listener)
{
osl::MutexGuard aGuard(m_aMutex);
m_aListeners.push_back(listener);
}
void QtClipboard::removeClipboardListener(
const css::uno::Reference<css::datatransfer::clipboard::XClipboardListener>& listener)
{
osl::MutexGuard aGuard(m_aMutex);
m_aListeners.erase(std::remove(m_aListeners.begin(), m_aListeners.end(), listener),
m_aListeners.end());
}
bool QtClipboard::isSupported(const QClipboard::Mode aMode)
{
const QClipboard* pClipboard = QApplication::clipboard();
switch (aMode)
{
case QClipboard::Selection:
return pClipboard->supportsSelection();
case QClipboard::FindBuffer:
return pClipboard->supportsFindBuffer();
case QClipboard::Clipboard:
return true;
}
return false;
}
bool QtClipboard::isOwner(const QClipboard::Mode aMode)
{
if (!isSupported(aMode))
return false;
const QClipboard* pClipboard = QApplication::clipboard();
switch (aMode)
{
case QClipboard::Selection:
return pClipboard->ownsSelection();
case QClipboard::FindBuffer:
return pClipboard->ownsFindBuffer();
case QClipboard::Clipboard:
return pClipboard->ownsClipboard();
}
return false;
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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