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++ // Copyright (C) 2024 The Qt Company Ltd.
++ // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
++
++ #include "spreadmimedataprovider.h"
++
++ #include <QMimeData>
++ #ifndef QT_NO_CLIPBOARD
++ #include <QGuiApplication>
++ #include <QClipboard>
++ #endif
++
++ namespace {
++ static inline constexpr auto MIMETYPE_SPREADMODEL = "application/x-qtexamplespreadmodel";
++ static inline constexpr auto MIMETYPE_SELECTEDDATA = "model/data";
++ static inline constexpr auto MIMETYPE_TEXT = "text/plain";
++ }
++
++ QMimeData *SpreadMimeDataProvider::saveToMimeData() const
++ {
++ if (m_data.empty())
++ return nullptr;
++
++ QByteArray data;
++ QDataStream stream{&data, QDataStream::WriteOnly};
++ for (auto it = m_data.begin(); it != m_data.end(); ++it) {
++ const QPoint &cell = it->first;
++ const QMap<int, QVariant> &item_data = it->second;
++ stream << cell.x() << cell.y() << item_data;
++ }
++
++ QMimeData *mime_data = new QMimeData{};
++ mime_data->setData(MIMETYPE_SPREADMODEL, QByteArray{});
++ mime_data->setData(MIMETYPE_SELECTEDDATA, data);
++ return mime_data;
++ }
++
++ bool SpreadMimeDataProvider::loadFromMimeData(const QMimeData *mimeData)
++ {
++ if (!mimeData)
++ return false;
++
++ if (!mimeData->hasFormat(MIMETYPE_SPREADMODEL))
++ return false;
++
++ QByteArray data = mimeData->data(MIMETYPE_SELECTEDDATA);
++ QDataStream stream{&data, QDataStream::ReadOnly};
++ while (!stream.atEnd()) {
++ QPoint cell;
++ QMap<int, QVariant> item_data;
++ stream >> cell.rx() >> cell.ry() >> item_data;
++ m_data.push_back(std::make_pair(cell, item_data));
++ }
++
++ return true;
++ }
++
++ bool SpreadMimeDataProvider::saveToClipboard()
++ {
++ #ifdef QT_NO_CLIPBOARD
++ qWarning() << "Clipboard is not supported";
++ return false;
++ #else
++ QMimeData *mime_data = saveToMimeData();
++ if (!mime_data)
++ return false;
++
++ QGuiApplication::clipboard()->setMimeData(mime_data);
++ return true;
++ #endif
++ }
++
++ bool SpreadMimeDataProvider::loadFromClipboard()
++ {
++ #ifdef QT_NO_CLIPBOARD
++ qWarning() << "Clipboard is not supported";
++ return false;
++ #else
++ const QMimeData *mime_data = QGuiApplication::clipboard()->mimeData();
++ if (!mime_data)
++ return false;
++
++ return loadFromMimeData(mime_data);
++ #endif
++ }
++
++ bool SpreadMimeDataProvider::saveDataToModel(int index,
++ const QModelIndex &modelIndex,
++ QAbstractItemModel *model) const
++ {
++ const QMap<int, QVariant> &item_data = m_data.at(index).second;
++ return item_data.isEmpty() ? model->clearItemData(modelIndex)
++ : model->setItemData(modelIndex, item_data);
++ }
++
++ void SpreadMimeDataProvider::loadDataFromModel(const QPoint &cell,
++ const QModelIndex &index,
++ const QAbstractItemModel *model)
++ {
++ const QMap<int, QVariant> &item_data = model->itemData(index);
++ m_data.push_back(std::make_pair(cell, item_data));
++ }