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diff --git a/src/plugins/platformthemes/xdgdesktopportal/qxdgdesktopportalfiledialog_p.h b/src/plugins/platformthemes/xdgdesktopportal/qxdgdesktopportalfiledialog_p.h
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+/****************************************************************************
+**
+** Copyright (C) 2017-2018 Red Hat, Inc
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the plugins of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or (at your option) the GNU General
+** Public license version 3 or any later version approved by the KDE Free
+** Qt Foundation. The licenses are as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-2.0.html and
+** https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+#ifndef QXDGDESKTOPPORTALFILEDIALOG_P_H
+#define QXDGDESKTOPPORTALFILEDIALOG_P_H
+
+#include <qpa/qplatformdialoghelper.h>
+#include <QVector>
+
+QT_BEGIN_NAMESPACE
+
+class QXdgDesktopPortalFileDialogPrivate;
+
+class QXdgDesktopPortalFileDialog : public QPlatformFileDialogHelper
+{
+    Q_OBJECT
+    Q_DECLARE_PRIVATE(QXdgDesktopPortalFileDialog)
+public:
+    enum ConditionType : uint {
+        GlobalPattern = 0,
+        MimeType = 1
+    };
+    // Filters a(sa(us))
+    // Example: [('Images', [(0, '*.ico'), (1, 'image/png')]), ('Text', [(0, '*.txt')])]
+    struct FilterCondition {
+        ConditionType type;
+        QString pattern; // E.g. '*ico' or 'image/png'
+    };
+    typedef QVector<FilterCondition> FilterConditionList;
+
+    struct Filter {
+        QString name; // E.g. 'Images' or 'Text
+        FilterConditionList filterConditions;; // E.g. [(0, '*.ico'), (1, 'image/png')] or [(0, '*.txt')]
+    };
+    typedef QVector<Filter> FilterList;
+
+    QXdgDesktopPortalFileDialog(QPlatformFileDialogHelper *nativeFileDialog = nullptr);
+    ~QXdgDesktopPortalFileDialog();
+
+    bool defaultNameFilterDisables() const override;
+    QUrl directory() const override;
+    void setDirectory(const QUrl &directory) override;
+    void selectFile(const QUrl &filename) override;
+    QList<QUrl> selectedFiles() const override;
+    void setFilter() override;
+    void selectNameFilter(const QString &filter) override;
+    QString selectedNameFilter() const override;
+
+    void exec() override;
+    bool show(Qt::WindowFlags windowFlags, Qt::WindowModality windowModality, QWindow *parent) override;
+    void hide() override;
+
+private Q_SLOTS:
+    void gotResponse(uint response, const QVariantMap &results);
+
+private:
+    void initializeDialog();
+    void openPortal();
+
+    QScopedPointer<QXdgDesktopPortalFileDialogPrivate> d_ptr;
+};
+
+QT_END_NAMESPACE
+
+Q_DECLARE_METATYPE(QXdgDesktopPortalFileDialog::FilterCondition);
+Q_DECLARE_METATYPE(QXdgDesktopPortalFileDialog::FilterConditionList);
+Q_DECLARE_METATYPE(QXdgDesktopPortalFileDialog::Filter);
+Q_DECLARE_METATYPE(QXdgDesktopPortalFileDialog::FilterList);
+
+#endif // QXDGDESKTOPPORTALFILEDIALOG_P_H
+