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345 | /* -*- 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 <Qt5Transferable.hxx>
#include <comphelper/sequence.hxx>
#include <sal/log.hxx>
#include <QtWidgets/QApplication>
#include <Qt5Instance.hxx>
#include <Qt5Tools.hxx>
#include <cassert>
static bool lcl_textMimeInfo(const OUString& rMimeString, bool& bHaveNoCharset, bool& bHaveUTF16,
bool& bHaveUTF8)
{
sal_Int32 nIndex = 0;
if (rMimeString.getToken(0, ';', nIndex) == "text/plain")
{
OUString aToken(rMimeString.getToken(0, ';', nIndex));
if (aToken == "charset=utf-16")
bHaveUTF16 = true;
else if (aToken == "charset=utf-8")
bHaveUTF8 = true;
else if (aToken.isEmpty())
bHaveNoCharset = true;
else // we just handle UTF-16 and UTF-8, everything else is "bytes"
return false;
return true;
}
return false;
}
Qt5Transferable::Qt5Transferable(const QMimeData* pMimeData)
: m_pMimeData(pMimeData)
, m_bConvertFromLocale(false)
{
assert(pMimeData);
}
css::uno::Sequence<css::datatransfer::DataFlavor> SAL_CALL Qt5Transferable::getTransferDataFlavors()
{
// it's just filled once, ever, so just try to get it without locking first
if (m_aMimeTypeSeq.hasElements())
return m_aMimeTypeSeq;
// better safe then sorry; preventing broken usage
// DnD should not be shared and Clipboard access runs in the GUI thread
osl::MutexGuard aGuard(m_aMutex);
if (m_aMimeTypeSeq.hasElements())
return m_aMimeTypeSeq;
QStringList aFormatList(m_pMimeData->formats());
// we might add the UTF-16 mime text variant later
const int nMimeTypeSeqSize = aFormatList.size() + 1;
bool bHaveNoCharset = false, bHaveUTF16 = false;
css::uno::Sequence<css::datatransfer::DataFlavor> aMimeTypeSeq(nMimeTypeSeqSize);
css::datatransfer::DataFlavor aFlavor;
int nMimeTypeCount = 0;
for (const QString& rMimeType : aFormatList)
{
// filter out non-MIME types such as TARGETS, MULTIPLE, TIMESTAMP
if (rMimeType.indexOf('/') == -1)
continue;
// gtk3 thinks it is not well defined - skip too
if (rMimeType == QStringLiteral("text/plain;charset=unicode"))
continue;
// LO doesn't like 'text/plain', so we have to provide UTF-16
bool bIsNoCharset = false, bIsUTF16 = false, bIsUTF8 = false;
if (lcl_textMimeInfo(toOUString(rMimeType), bIsNoCharset, bIsUTF16, bIsUTF8))
{
bHaveNoCharset |= bIsNoCharset;
bHaveUTF16 |= bIsUTF16;
if (bIsUTF16)
aFlavor.DataType = cppu::UnoType<OUString>::get();
else
aFlavor.DataType = cppu::UnoType<css::uno::Sequence<sal_Int8>>::get();
}
else
aFlavor.DataType = cppu::UnoType<css::uno::Sequence<sal_Int8>>::get();
aFlavor.MimeType = toOUString(rMimeType);
assert(nMimeTypeCount < nMimeTypeSeqSize);
aMimeTypeSeq[nMimeTypeCount] = aFlavor;
nMimeTypeCount++;
}
m_bConvertFromLocale = bHaveNoCharset && !bHaveUTF16;
if (m_bConvertFromLocale)
{
aFlavor.MimeType = "text/plain;charset=utf-16";
aFlavor.DataType = cppu::UnoType<OUString>::get();
assert(nMimeTypeCount < nMimeTypeSeqSize);
aMimeTypeSeq[nMimeTypeCount] = aFlavor;
nMimeTypeCount++;
}
aMimeTypeSeq.realloc(nMimeTypeCount);
m_aMimeTypeSeq = aMimeTypeSeq;
return m_aMimeTypeSeq;
}
sal_Bool SAL_CALL
Qt5Transferable::isDataFlavorSupported(const css::datatransfer::DataFlavor& rFlavor)
{
const auto aSeq = getTransferDataFlavors();
return std::any_of(aSeq.begin(), aSeq.end(), [&](const css::datatransfer::DataFlavor& aFlavor) {
return rFlavor.MimeType == aFlavor.MimeType;
});
}
css::uno::Any SAL_CALL
Qt5Transferable::getTransferData(const css::datatransfer::DataFlavor& rFlavor)
{
css::uno::Any aAny;
if (!isDataFlavorSupported(rFlavor))
return aAny;
if (rFlavor.MimeType == "text/plain;charset=utf-16")
{
OUString aString;
if (m_bConvertFromLocale)
{
QByteArray aByteData(m_pMimeData->data(QStringLiteral("text/plain")));
aString = OUString(reinterpret_cast<const char*>(aByteData.data()), aByteData.size(),
osl_getThreadTextEncoding());
}
else
{
QByteArray aByteData(m_pMimeData->data(toQString(rFlavor.MimeType)));
aString = OUString(reinterpret_cast<const sal_Unicode*>(aByteData.data()),
aByteData.size() / 2);
}
aAny <<= aString;
}
else
{
QByteArray aByteData(m_pMimeData->data(toQString(rFlavor.MimeType)));
css::uno::Sequence<sal_Int8> aSeq(reinterpret_cast<const sal_Int8*>(aByteData.data()),
aByteData.size());
aAny <<= aSeq;
}
return aAny;
}
Qt5ClipboardTransferable::Qt5ClipboardTransferable(const QClipboard::Mode aMode,
const QMimeData* pMimeData)
: Qt5Transferable(pMimeData)
, m_aMode(aMode)
{
}
bool Qt5ClipboardTransferable::hasInFlightChanged() const
{
const bool bChanged(mimeData() != QApplication::clipboard()->mimeData(m_aMode));
SAL_WARN_IF(bChanged, "vcl.qt5",
"In flight clipboard change detected - broken clipboard read!");
return bChanged;
}
css::uno::Any SAL_CALL
Qt5ClipboardTransferable::getTransferData(const css::datatransfer::DataFlavor& rFlavor)
{
css::uno::Any aAny;
auto* pSalInst(static_cast<Qt5Instance*>(GetSalData()->m_pInstance));
SolarMutexGuard g;
pSalInst->RunInMainThread([&, this]() {
if (!hasInFlightChanged())
aAny = Qt5Transferable::getTransferData(rFlavor);
});
return aAny;
}
css::uno::Sequence<css::datatransfer::DataFlavor>
SAL_CALL Qt5ClipboardTransferable::getTransferDataFlavors()
{
css::uno::Sequence<css::datatransfer::DataFlavor> aSeq;
auto* pSalInst(static_cast<Qt5Instance*>(GetSalData()->m_pInstance));
SolarMutexGuard g;
pSalInst->RunInMainThread([&, this]() {
if (!hasInFlightChanged())
aSeq = Qt5Transferable::getTransferDataFlavors();
});
return aSeq;
}
sal_Bool SAL_CALL
Qt5ClipboardTransferable::isDataFlavorSupported(const css::datatransfer::DataFlavor& rFlavor)
{
bool bIsSupported = false;
auto* pSalInst(static_cast<Qt5Instance*>(GetSalData()->m_pInstance));
SolarMutexGuard g;
pSalInst->RunInMainThread([&, this]() {
if (!hasInFlightChanged())
bIsSupported = Qt5Transferable::isDataFlavorSupported(rFlavor);
});
return bIsSupported;
}
Qt5MimeData::Qt5MimeData(const css::uno::Reference<css::datatransfer::XTransferable>& xTrans)
: m_aContents(xTrans)
, m_bHaveNoCharset(false)
, m_bHaveUTF8(false)
{
assert(xTrans.is());
}
bool Qt5MimeData::deepCopy(QMimeData** const pMimeCopy) const
{
if (!pMimeCopy)
return false;
QMimeData* pMimeData = new QMimeData();
for (QString& format : formats())
{
QByteArray aData = data(format);
// Checking for custom MIME types
if (format.startsWith("application/x-qt"))
{
// Retrieving true format name
int indexBegin = format.indexOf('"') + 1;
int indexEnd = format.indexOf('"', indexBegin);
format = format.mid(indexBegin, indexEnd - indexBegin);
}
pMimeData->setData(format, aData);
}
*pMimeCopy = pMimeData;
return true;
}
QStringList Qt5MimeData::formats() const
{
if (!m_aMimeTypeList.isEmpty())
return m_aMimeTypeList;
const css::uno::Sequence<css::datatransfer::DataFlavor> aFormats
= m_aContents->getTransferDataFlavors();
QStringList aList;
bool bHaveUTF16 = false;
for (const auto& rFlavor : aFormats)
{
aList << toQString(rFlavor.MimeType);
lcl_textMimeInfo(rFlavor.MimeType, m_bHaveNoCharset, bHaveUTF16, m_bHaveUTF8);
}
// we provide a locale encoded and a UTF-8 variant, if missing
if (m_bHaveNoCharset || bHaveUTF16 || m_bHaveUTF8)
{
// if there is a text representation from LO point of view, it'll be UTF-16
assert(bHaveUTF16);
if (!m_bHaveUTF8)
aList << QStringLiteral("text/plain;charset=utf-8");
if (!m_bHaveNoCharset)
aList << QStringLiteral("text/plain");
}
m_aMimeTypeList = aList;
return m_aMimeTypeList;
}
QVariant Qt5MimeData::retrieveData(const QString& mimeType, QVariant::Type) const
{
if (!hasFormat(mimeType))
return QVariant();
css::datatransfer::DataFlavor aFlavor;
aFlavor.MimeType = toOUString(mimeType);
aFlavor.DataType = cppu::UnoType<css::uno::Sequence<sal_Int8>>::get();
bool bWantNoCharset = false, bWantUTF16 = false, bWantUTF8 = false;
if (lcl_textMimeInfo(aFlavor.MimeType, bWantNoCharset, bWantUTF16, bWantUTF8))
{
if ((bWantNoCharset && !m_bHaveNoCharset) || (bWantUTF8 && !m_bHaveUTF8))
{
aFlavor.MimeType = "text/plain;charset=utf-16";
aFlavor.DataType = cppu::UnoType<OUString>::get();
}
else if (bWantUTF16)
aFlavor.DataType = cppu::UnoType<OUString>::get();
}
css::uno::Any aValue;
try
{
// tdf#129809 take a reference in case m_aContents is replaced during this call
css::uno::Reference<com::sun::star::datatransfer::XTransferable> xCurrentContents(
m_aContents);
aValue = xCurrentContents->getTransferData(aFlavor);
}
catch (...)
{
}
QByteArray aByteArray;
if (aValue.getValueTypeClass() == css::uno::TypeClass_STRING)
{
OUString aString;
aValue >>= aString;<--- Variable 'aValue' is assigned a value that is never used.
if (bWantUTF8)
{
OString aUTF8String(OUStringToOString(aString, RTL_TEXTENCODING_UTF8));
aByteArray = QByteArray(reinterpret_cast<const char*>(aUTF8String.getStr()),
aUTF8String.getLength());
}
else if (bWantNoCharset)
{
OString aLocaleString(OUStringToOString(aString, osl_getThreadTextEncoding()));
aByteArray = QByteArray(reinterpret_cast<const char*>(aLocaleString.getStr()),
aLocaleString.getLength());
}
else
return QVariant(toQString(aString));
}
else
{
css::uno::Sequence<sal_Int8> aData;
aValue >>= aData;<--- Variable 'aValue' is assigned a value that is never used.
aByteArray
= QByteArray(reinterpret_cast<const char*>(aData.getConstArray()), aData.getLength());
}
return QVariant::fromValue(aByteArray);
}
bool Qt5MimeData::hasFormat(const QString& mimeType) const { return formats().contains(mimeType); }
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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