Source code
Revision control
Copy as Markdown
// Copyright (C) 2025 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
#include <QtCore/qstringlist.h>
#include <QtGui/private/qinternalmimedata_p.h>
#include <qohosmimedata.h>
#include <qohosutils.h>
QT_BEGIN_NAMESPACE
namespace {
class SuppliersBasedMimeData : public QInternalMimeData
{
public:
SuppliersBasedMimeData(std::shared_ptr<const std::map<QString, QOhosSupplier<QVariant>>> mimeValuesSuppliers);
protected:
bool hasFormat_sys(const QString &mimeType) const override;
QStringList formats_sys() const override;
QVariant retrieveData_sys(const QString &mimeType, QMetaType type) const override;
private:
std::shared_ptr<const std::map<QString, QOhosSupplier<QVariant>>> m_mimeValuesSuppliers;
};
SuppliersBasedMimeData::SuppliersBasedMimeData(
std::shared_ptr<const std::map<QString, QOhosSupplier<QVariant>>> mimeValuesSuppliers)
: m_mimeValuesSuppliers(mimeValuesSuppliers)
{
}
bool SuppliersBasedMimeData::hasFormat_sys(const QString &mimeType) const
{
return m_mimeValuesSuppliers->find(mimeType) != m_mimeValuesSuppliers->end();
}
QStringList SuppliersBasedMimeData::formats_sys() const
{
QStringList formats;
for (const auto &entry : *m_mimeValuesSuppliers)
formats.append(entry.first);
return formats;
}
QVariant SuppliersBasedMimeData::retrieveData_sys(const QString &mimeType, QMetaType) const
{
auto supplierIter = m_mimeValuesSuppliers->find(mimeType);
return supplierIter != m_mimeValuesSuppliers->end()
? (supplierIter->second)()
: QVariant();
}
}
QOhosSupplier<std::unique_ptr<QMimeData>> makeQOhosLazyFetchMimeDataFactory(
std::map<QString, QOhosSupplier<QVariant>> mimeValuesSuppliers)
{
auto memoizingSuppliers = std::make_shared<std::map<QString, QOhosSupplier<QVariant>>>();
for (auto &entry : mimeValuesSuppliers)
memoizingSuppliers->emplace(
entry.first, QtOhos::makeMemoizingSupplier(std::move(entry.second)));
return [memoizingSuppliers]() {
return std::make_unique<SuppliersBasedMimeData>(memoizingSuppliers);
};
}
QOhosSupplier<std::unique_ptr<QMimeData>> makeQOhosMimeDataFactory(std::map<QString, QVariant> mimeValues)
{
auto mimeValuesSuppliers = std::make_shared<std::map<QString, QOhosSupplier<QVariant>>>();
for (auto &entry : mimeValues) {
mimeValuesSuppliers->emplace(
entry.first,
[value = entry.second]() {
return value;
});
}
return [mimeValuesSuppliers]() {
return std::make_unique<SuppliersBasedMimeData>(mimeValuesSuppliers);
};
}
QT_END_NAMESPACE