WingHexExplorer2/3rdparty/qcodeedit2/lib/document/qdocumentcursor.h

/****************************************************************************
**
** Copyright (C) 2006-2009 fullmetalcoder <fullmetalcoder@hotmail.fr>
**
** This file is part of the Edyuk project <http://edyuk.org>
**
** This file may be used under the terms of the GNU General Public License
** version 3 as published by the Free Software Foundation and appearing in the
** file GPL.txt included in the packaging of this file.
**
** 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 _QDOCUMENT_CURSOR_H_
#define _QDOCUMENT_CURSOR_H_

#include "qce-config.h"

/*!
        \file qdocumentcursor.h
        \brief Definition of the QDocumentCursor class
*/

class QChar;
class QPoint;
class QString;
class QPolygon;

class QDocument;
class QDocumentLine;
struct QDocumentSelection;
class QDocumentCursorHandle;

class QCE_EXPORT QDocumentCursor {
public:
    enum MoveFlag { MoveAnchor = 0, KeepAnchor = 1, ThroughWrap = 2 };

    Q_DECLARE_FLAGS(MoveMode, MoveFlag);

    enum MoveOperation {
        NoMove,
        Up,
        Down,
        Left,
        PreviousCharacter = Left,
        Right,
        NextCharacter = Right,
        Start,
        StartOfLine,
        StartOfBlock = StartOfLine,
        StartOfWord,
        PreviousBlock,
        PreviousLine = PreviousBlock,
        PreviousWord,
        WordLeft,
        WordRight,
        End,
        EndOfLine,
        EndOfBlock = EndOfLine,
        EndOfWord,
        NextWord,
        NextBlock,
        NextLine = NextBlock
    };

    enum SelectionType { WordUnderCursor, LineUnderCursor };

    explicit QDocumentCursor(QDocument *doc);
    QDocumentCursor(const QDocumentCursor &cursor);
    QDocumentCursor(QDocument *doc, int line, int column = 0);
    // QDocumentCursor(const QDocumentLine& line, int column = 0);
    QDocumentCursor(QDocumentCursorHandle *handle = 0);

    ~QDocumentCursor();

    QDocumentCursor clone() const;

    QDocumentCursor &operator=(const QDocumentCursor &c);

    bool operator==(const QDocumentCursor &c) const;
    bool operator!=(const QDocumentCursor &c) const;

    bool operator<(const QDocumentCursor &c) const;
    bool operator>(const QDocumentCursor &c) const;

    bool operator<=(const QDocumentCursor &c) const;
    bool operator>=(const QDocumentCursor &c) const;

    bool isNull() const;
    bool isValid() const;

    bool atEnd() const;
    bool atStart() const;

    bool atBlockEnd() const;
    bool atBlockStart() const;

    bool atLineEnd() const;
    bool atLineStart() const;

    bool hasSelection() const;

    bool isSilent() const;
    void setSilent(bool y);

    bool isAutoUpdated() const;
    void setAutoUpdated(bool y);

    int position() const;

    int lineNumber() const;
    int columnNumber() const;

    int anchorLineNumber() const;
    int anchorColumnNumber() const;

    int visualColumnNumber() const;

    void setColumnNumber(int c, MoveMode m = MoveAnchor);

    int wrappedLineOffset() const;
    int anchorWrappedLineOffset() const;

    QPoint documentPosition() const;
    QPoint anchorDocumentPosition() const;

    QPolygon documentRegion() const;

    QDocumentLine line() const;
    QDocumentLine anchorLine() const;

    void shift(int offset);
    bool movePosition(int offset, MoveOperation op = NextCharacter,
                      MoveMode m = MoveAnchor);

    void moveTo(int line, int column);
    void moveTo(const QDocumentCursor &c);
    void moveTo(const QDocumentLine &l, int column);

    void eraseLine();
    void insertLine(bool keepAnchor = false);
    void insertText(const QString &s, bool keepAnchor = false,
                    const QString &sfmtID = {});

    QDocumentCursor selectionStart() const;
    QDocumentCursor selectionEnd() const;

    QString selectedText() const;

    void clearSelection();
    void removeSelectedText();
    void replaceSelectedText(const QString &text);

    void select(SelectionType t);
    void setSelectionBoundary(const QDocumentCursor &c);

    bool isWithinSelection(const QDocumentCursor &c) const;

    QChar nextChar() const;
    QChar previousChar() const;

    void deleteChar();
    void deletePreviousChar();

    void beginEditBlock();
    void endEditBlock();

    void refreshColumnMemory();
    bool hasColumnMemory() const;
    void setColumnMemory(bool y);

    QDocumentSelection selection() const;

    QDocument *document() const;

    inline QDocumentCursorHandle *handle() const { return m_handle; }

private:
    QDocumentCursorHandle *m_handle;
};

#endif