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// This defines the interface to the QsciLexerCustom class.
//
// Copyright (c) 2019 Riverbank Computing Limited <info@riverbankcomputing.com>
//
// This file is part of QScintilla.
//
// This file may be used under the terms of the GNU General Public License
// version 3.0 as published by the Free Software Foundation and appearing in
// the file LICENSE included in the packaging of this file. Please review the
// following information to ensure the GNU General Public License version 3.0
// requirements will be met: http://www.gnu.org/copyleft/gpl.html.
//
// If you do not wish to use this file under the terms of the GPL version 3.0
// then you may purchase a commercial license. For more information contact
// info@riverbankcomputing.com.
//
// This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
// WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
#ifndef QSCILEXERCUSTOM_H
#define QSCILEXERCUSTOM_H
#include <Qsci/qsciglobal.h>
#include <Qsci/qscilexer.h>
class QsciScintilla;
class QsciStyle;
//! \brief The QsciLexerCustom class is an abstract class used as a base for
//! new language lexers.
//!
//! The advantage of implementing a new lexer this way (as opposed to adding
//! the lexer to the underlying Scintilla code) is that it does not require the
//! QScintilla library to be re-compiled. It also makes it possible to
//! integrate external lexers.
//!
//! All that is necessary to implement a new lexer is to define appropriate
//! styles and to re-implement the styleText() method.
class QSCINTILLA_EXPORT QsciLexerCustom : public QsciLexer
{
Q_OBJECT
public:
//! Construct a QsciLexerCustom with parent \a parent. \a parent is
//! typically the QsciScintilla instance.
QsciLexerCustom(QObject *parent = 0);
//! Destroy the QSciLexerCustom.
virtual ~QsciLexerCustom();
//! The next \a length characters starting from the current styling
//! position have their style set to style number \a style. The current
//! styling position is moved. The styling position is initially set by
//! calling startStyling().
//!
//! \sa startStyling(), styleText()
void setStyling(int length, int style);
//! The next \a length characters starting from the current styling
//! position have their style set to style \a style. The current styling
//! position is moved. The styling position is initially set by calling
//! startStyling().
//!
//! \sa startStyling(), styleText()
void setStyling(int length, const QsciStyle &style);
//! The styling position is set to \a start. \a styleBits is unused.
//!
//! \sa setStyling(), styleBitsNeeded(), styleText()
void startStyling(int pos, int styleBits = 0);
//! This is called when the section of text beginning at position \a start
//! and up to position \a end needs to be styled. \a start will always be
//! at the start of a line. The text is styled by calling startStyling()
//! followed by one or more calls to setStyling(). It must be
//! re-implemented by a sub-class.
//!
//! \sa setStyling(), startStyling(), QsciScintilla::bytes(),
//! QsciScintilla::text()
virtual void styleText(int start, int end) = 0;
//! \reimp
virtual void setEditor(QsciScintilla *editor);
//! \reimp This re-implementation returns 5 as the number of style bits
//! needed.
virtual int styleBitsNeeded() const;
private slots:
void handleStyleNeeded(int pos);
private:
QsciLexerCustom(const QsciLexerCustom &);
QsciLexerCustom &operator=(const QsciLexerCustom &);
};
#endif
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