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diff --git a/tools/qmlls/textblock.h b/tools/qmlls/textblock.h
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+/****************************************************************************
+**
+** Copyright (C) 2021 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the tools applications 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 TEXTBLOCK_H
+#define TEXTBLOCK_H
+
+#include <QtCore/qstring.h>
+
+namespace Utils {
+
+class TextDocument;
+class TextBlockUserData;
+
+class TextBlock
+{
+public:
+    bool isValid() const;
+
+    void setBlockNumber(int blockNumber);
+    int blockNumber() const;
+
+    void setPosition(int position);
+    int position() const;
+
+    void setLength(int length);
+    int length() const;
+
+    TextBlock next() const;
+    TextBlock previous() const;
+
+    int userState() const;
+    void setUserState(int state);
+
+    bool isVisible() const;
+    void setVisible(bool visible);
+
+    void setLineCount(int count);
+    int lineCount() const;
+
+    void setDocument(TextDocument *document);
+    TextDocument *document() const;
+
+    QString text() const;
+
+    int revision() const;
+    void setRevision(int rev);
+
+    bool operator==(const TextBlock &other) const;
+    bool operator!=(const TextBlock &other) const;
+
+private:
+    TextDocument *m_document = nullptr;
+    int m_revision = 0;
+
+    int m_position = 0;
+    int m_length = 0;
+    int m_blockNumber = -1;
+};
+
+} // namespace Utils
+
+#endif // TEXTBLOCK_H