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// Copyright (C) 2017 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
// Qt-Security score:significant reason:default
#include "qwindowsdropdataobject.h"
#include <QtCore/qurl.h>
#include <QtCore/qmimedata.h>
#include "qwindowsmimeregistry.h"
QT_BEGIN_NAMESPACE
using namespace Qt::StringLiterals;
/*!
\class QWindowsDropDataObject
\brief QWindowsOleDataObject subclass specialized for handling Drag&Drop.
Prevents "text/uri-list" data for local files from being exported as text
or URLs, to allow dropped files to be attached to Office applications
(instead of creating local hyperlinks).
\internal
*/
QWindowsDropDataObject::QWindowsDropDataObject(QMimeData *mimeData) :
QWindowsOleDataObject(mimeData)
{
}
QWindowsDropDataObject::~QWindowsDropDataObject() = default;
STDMETHODIMP
QWindowsDropDataObject::GetData(LPFORMATETC pformatetc, LPSTGMEDIUM pmedium) noexcept
{
if (shouldIgnore(pformatetc))
return ResultFromScode(DATA_E_FORMATETC);
return QWindowsOleDataObject::GetData(pformatetc, pmedium);
}
STDMETHODIMP
QWindowsDropDataObject::QueryGetData(LPFORMATETC pformatetc) noexcept
{
if (shouldIgnore(pformatetc))
return ResultFromScode(DATA_E_FORMATETC);
return QWindowsOleDataObject::QueryGetData(pformatetc);
}
// If the data is "text/uri-list" only, and all URIs are for local files,
// we prevent it from being exported as text or URLs, to make target applications
// like MS Office attach or open the files instead of creating local hyperlinks.
bool QWindowsDropDataObject::shouldIgnore(LPFORMATETC pformatetc) const
{
QMimeData *dropData = mimeData();
if (dropData && dropData->formats().size() == 1 && dropData->hasUrls()) {
QString formatName = QWindowsMimeRegistry::clipboardFormatName(pformatetc->cfFormat);
if (pformatetc->cfFormat == CF_UNICODETEXT
|| pformatetc->cfFormat == CF_TEXT
|| formatName == "UniformResourceLocator"_L1
|| formatName == "UniformResourceLocatorW"_L1) {
const auto urls = dropData->urls();
return std::all_of(urls.cbegin(), urls.cend(), [] (const QUrl &u) { return u.isLocalFile(); });
}
}
return false;
}
QT_END_NAMESPACE