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Diffstat (limited to 'vcl/qt5/QtTransferable.cxx')
| -rw-r--r-- | vcl/qt5/QtTransferable.cxx | 361 |
1 files changed, 361 insertions, 0 deletions
diff --git a/vcl/qt5/QtTransferable.cxx b/vcl/qt5/QtTransferable.cxx new file mode 100644 index 0000000000..d9e0beaa71 --- /dev/null +++ b/vcl/qt5/QtTransferable.cxx @@ -0,0 +1,361 @@ +/* -*- 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 <QtTransferable.hxx> + +#include <comphelper/sequence.hxx> +#include <sal/log.hxx> +#include <o3tl/string_view.hxx> + +#include <QtWidgets/QApplication> + +#include <QtInstance.hxx> +#include <QtTools.hxx> + +#include <cassert> + +static bool lcl_textMimeInfo(std::u16string_view rMimeString, bool& bHaveNoCharset, + bool& bHaveUTF16, bool& bHaveUTF8) +{ + sal_Int32 nIndex = 0; + if (o3tl::getToken(rMimeString, 0, ';', nIndex) == u"text/plain") + { + std::u16string_view aToken(o3tl::getToken(rMimeString, 0, ';', nIndex)); + if (aToken == u"charset=utf-16") + bHaveUTF16 = true; + else if (aToken == u"charset=utf-8") + bHaveUTF8 = true; + else if (aToken.empty()) + bHaveNoCharset = true; + else // we just handle UTF-16 and UTF-8, everything else is "bytes" + return false; + return true; + } + return false; +} + +QtTransferable::QtTransferable(const QMimeData* pMimeData) + : m_pMimeData(pMimeData) + , m_bProvideUTF16FromOtherEncoding(false) +{ + assert(pMimeData); +} + +css::uno::Sequence<css::datatransfer::DataFlavor> SAL_CALL QtTransferable::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, bHaveUTF8 = false; + css::uno::Sequence<css::datatransfer::DataFlavor> aMimeTypeSeq(nMimeTypeSeqSize); + auto pMimeTypeSeq = aMimeTypeSeq.getArray(); + + 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; + bHaveUTF8 |= bIsUTF8; + 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); + pMimeTypeSeq[nMimeTypeCount] = aFlavor; + nMimeTypeCount++; + } + + m_bProvideUTF16FromOtherEncoding = (bHaveNoCharset || bHaveUTF8) && !bHaveUTF16; + if (m_bProvideUTF16FromOtherEncoding) + { + aFlavor.MimeType = "text/plain;charset=utf-16"; + aFlavor.DataType = cppu::UnoType<OUString>::get(); + assert(nMimeTypeCount < nMimeTypeSeqSize); + pMimeTypeSeq[nMimeTypeCount] = aFlavor; + nMimeTypeCount++; + } + + aMimeTypeSeq.realloc(nMimeTypeCount); + + m_aMimeTypeSeq = aMimeTypeSeq; + return m_aMimeTypeSeq; +} + +sal_Bool SAL_CALL +QtTransferable::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 QtTransferable::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_bProvideUTF16FromOtherEncoding) + { + if (m_pMimeData->hasFormat("text/plain;charset=utf-8")) + { + QByteArray aByteData(m_pMimeData->data(QStringLiteral("text/plain;charset=utf-8"))); + aString = OUString::fromUtf8(reinterpret_cast<const char*>(aByteData.data())); + } + else + { + 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; +} + +QtClipboardTransferable::QtClipboardTransferable(const QClipboard::Mode aMode, + const QMimeData* pMimeData) + : QtTransferable(pMimeData) + , m_aMode(aMode) +{ +} + +bool QtClipboardTransferable::hasInFlightChanged() const +{ + const bool bChanged(mimeData() != QApplication::clipboard()->mimeData(m_aMode)); + SAL_WARN_IF(bChanged, "vcl.qt", "In flight clipboard change detected - broken clipboard read!"); + return bChanged; +} + +css::uno::Any SAL_CALL +QtClipboardTransferable::getTransferData(const css::datatransfer::DataFlavor& rFlavor) +{ + css::uno::Any aAny; + auto* pSalInst(GetQtInstance()); + SolarMutexGuard g; + pSalInst->RunInMainThread([&, this]() { + if (!hasInFlightChanged()) + aAny = QtTransferable::getTransferData(rFlavor); + }); + return aAny; +} + +css::uno::Sequence<css::datatransfer::DataFlavor> + SAL_CALL QtClipboardTransferable::getTransferDataFlavors() +{ + css::uno::Sequence<css::datatransfer::DataFlavor> aSeq; + auto* pSalInst(GetQtInstance()); + SolarMutexGuard g; + pSalInst->RunInMainThread([&, this]() { + if (!hasInFlightChanged()) + aSeq = QtTransferable::getTransferDataFlavors(); + }); + return aSeq; +} + +sal_Bool SAL_CALL +QtClipboardTransferable::isDataFlavorSupported(const css::datatransfer::DataFlavor& rFlavor) +{ + bool bIsSupported = false; + auto* pSalInst(GetQtInstance()); + SolarMutexGuard g; + pSalInst->RunInMainThread([&, this]() { + if (!hasInFlightChanged()) + bIsSupported = QtTransferable::isDataFlavorSupported(rFlavor); + }); + return bIsSupported; +} + +QtMimeData::QtMimeData(const css::uno::Reference<css::datatransfer::XTransferable>& xTrans) + : m_aContents(xTrans) + , m_bHaveNoCharset(false) + , m_bHaveUTF8(false) +{ + assert(xTrans.is()); +} + +bool QtMimeData::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 QtMimeData::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; +} + +#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0) +QVariant QtMimeData::retrieveData(const QString& mimeType, QVariant::Type) const +#else +QVariant QtMimeData::retrieveData(const QString& mimeType, QMetaType) const +#endif +{ + 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; + + if (bWantUTF8) + { + OString aUTF8String(OUStringToOString(aString, RTL_TEXTENCODING_UTF8)); + aByteArray = QByteArray(aUTF8String.getStr(), aUTF8String.getLength()); + } + else if (bWantNoCharset) + { + OString aLocaleString(OUStringToOString(aString, osl_getThreadTextEncoding())); + aByteArray = QByteArray(aLocaleString.getStr(), aLocaleString.getLength()); + } + else if (bWantUTF16) + { + aByteArray = QByteArray(reinterpret_cast<const char*>(aString.getStr()), + aString.getLength() * 2); + } + else + return QVariant(toQString(aString)); + } + else + { + css::uno::Sequence<sal_Int8> aData; + aValue >>= aData; + aByteArray + = QByteArray(reinterpret_cast<const char*>(aData.getConstArray()), aData.getLength()); + } + return QVariant::fromValue(aByteArray); +} + +bool QtMimeData::hasFormat(const QString& mimeType) const { return formats().contains(mimeType); } + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |