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++ // Copyright (C) 2021 The Qt Company Ltd.
++ // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
++
++ #include "inputlistview.h"
++
++ #include <QDropEvent>
++ #include <QMimeData>
++
++ InputListView::InputListView(QWidget *parent) : QListWidget(parent)
++ {
++ setSelectionMode(QAbstractItemView::ExtendedSelection);
++ setAcceptDrops(true);
++ }
++
++ bool InputListView::tryAddItem(const QString &label)
++ {
++ if (containsItem(label))
++ return false;
++
++ addItem(label);
++ return true;
++ }
++
++ void InputListView::dropEvent(QDropEvent *event)
++ {
++ constexpr int MAX_URLS = 1024;
++ const QMimeData *mimeData = event->mimeData();
++
++ if (mimeData->hasUrls()) {
++ QList<QUrl> urlList = mimeData->urls();
++ for (int i = 0; i < urlList.size() && i < MAX_URLS; ++i) {
++ const QUrl &url = urlList.at(i);
++ const auto filename = url.toLocalFile();
++ if (url.isLocalFile() && !containsItem(filename))
++ addItem(filename);
++ }
++ }
++ }
++
++ void InputListView::dragEnterEvent(QDragEnterEvent *event)
++ {
++ event->acceptProposedAction();
++ }
++
++ void InputListView::dragMoveEvent(QDragMoveEvent *event)
++ {
++ event->acceptProposedAction();
++ }
++
++ void InputListView::dragLeaveEvent(QDragLeaveEvent *event)
++ {
++ event->accept();
++ }
++
++ bool InputListView::containsItem(const QString &needle)
++ {
++ for (int i = 0; i < count(); ++i) {
++ if (item(i)->text() == needle)
++ return true;
++ }
++ return false;
++ }