/****************************************************************************
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** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
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** Contact: Nokia Corporation (qt-info@nokia.com)
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** This file is part of the QtGui module of the Qt Toolkit.
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** GNU Lesser General Public License Usage
** This file may be used under the terms of the GNU Lesser General Public
** License version 2.1 as published by the Free Software Foundation and
** appearing in the file LICENSE.LGPL included in the packaging of this
** file. Please review the following information to ensure the GNU Lesser
** General Public License version 2.1 requirements will be met:
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU General
** Public License version 3.0 as published by the Free Software Foundation
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** file. Please review the following information to ensure the GNU General
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** $QT_END_LICENSE$
**
****************************************************************************/

#ifndef QSYNTAXHIGHLIGHTER_H
#define QSYNTAXHIGHLIGHTER_H

#include <QtCore/qglobal.h>

#ifndef QT_NO_SYNTAXHIGHLIGHTER

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

QT_BEGIN_HEADER

QT_BEGIN_NAMESPACE

QT_MODULE(Gui)

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

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

QT_END_HEADER

#endif // QT_NO_SYNTAXHIGHLIGHTER

#endif // QSYNTAXHIGHLIGHTER_H
