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/****************************************************************************
**
** Copyright (C) 2022 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtGui module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:COMM$
**
** 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.
**
** $QT_END_LICENSE$
**
**
**
**
**
**
**
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**
******************************************************************************/

#ifndef QSYNTAXHIGHLIGHTER_H
#define QSYNTAXHIGHLIGHTER_H

#include <QtGui/qtguiglobal.h>

#ifndef QT_NO_SYNTAXHIGHLIGHTER

#include <QtCore/qobject.h>
#include <QtGui/qtextobject.h>

QT_BEGIN_NAMESPACE


class QTextDocument;
class QSyntaxHighlighterPrivate;
class QTextCharFormat;
class QFont;
class QColor;
class QTextBlockUserData;

class Q_GUI_EXPORT QSyntaxHighlighter : public QObject
{
    Q_OBJECT
    Q_DECLARE_PRIVATE(QSyntaxHighlighter)
public:
    explicit QSyntaxHighlighter(QObject *parent);
    explicit QSyntaxHighlighter(QTextDocument *parent);
    ~QSyntaxHighlighter();

    void setDocument(QTextDocument *doc);
    QTextDocument *document() const;

public Q_SLOTS:
    void rehighlight();
    void rehighlightBlock(const QTextBlock &block);

protected:
    virtual void highlightBlock(const QString &text) = 0;

    void setFormat(int start, int count, const QTextCharFormat &format);
    void setFormat(int start, int count, const QColor &color);
    void setFormat(int start, int count, const QFont &font);
    QTextCharFormat format(int pos) const;

    int previousBlockState() const;
    int currentBlockState() const;
    void setCurrentBlockState(int newState);

    void setCurrentBlockUserData(QTextBlockUserData *data);
    QTextBlockUserData *currentBlockUserData() const;

    QTextBlock currentBlock() const;

private:
    Q_DISABLE_COPY(QSyntaxHighlighter)
    Q_PRIVATE_SLOT(d_func(), void _q_reformatBlocks(int from, int charsRemoved, int charsAdded))
    Q_PRIVATE_SLOT(d_func(), void _q_delayedRehighlight())
};

QT_END_NAMESPACE

#endif // QT_NO_SYNTAXHIGHLIGHTER

#endif // QSYNTAXHIGHLIGHTER_H