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/***************************************************************************
**
** This file is part of Qt Creator
**
** Copyright (c) 2008 Nokia Corporation and/or its subsidiary(-ies).
**
** Contact:  Qt Software Information (qt-info@nokia.com)
**
** 
** Non-Open Source Usage  
** 
** Licensees may use this file in accordance with the Qt Beta Version
** License Agreement, Agreement version 2.2 provided with the Software or,
** alternatively, in accordance with the terms contained in a written
** agreement between you and Nokia.  
** 
** GNU General Public License Usage 
** 
** Alternatively, this file may be used under the terms of the GNU General
** Public License versions 2.0 or 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the packaging
** of this file.  Please review the following information to ensure GNU
** General Public Licensing requirements will be met:
**
** http://www.fsf.org/licensing/licenses/info/GPLv2.html and
** http://www.gnu.org/copyleft/gpl.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt GPL Exception version
** 1.2, included in the file GPL_EXCEPTION.txt in this package.  
** 
***************************************************************************/
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#ifndef BINEDITOR_H
#define BINEDITOR_H

#include <QtGui/qabstractscrollarea.h>
#include <QtCore/qbasictimer.h>
#include <QtCore/qstack.h>
#include <QtGui/qtextdocument.h>
#include <QtGui/qtextformat.h>

namespace Core {
class IEditor;
}

namespace TextEditor {
class FontSettings;
}

namespace BINEditor {

class BinEditor : public QAbstractScrollArea
{
    Q_OBJECT
    Q_PROPERTY(bool modified READ isModified WRITE setModified DESIGNABLE false)
public:

    BinEditor(QWidget *parent = 0);
    ~BinEditor();

    void setData(const QByteArray &data);
    QByteArray data() const;

    void zoomIn(int range = 1);
    void zoomOut(int range = 1);

    enum MoveMode {
        MoveAnchor,
        KeepAnchor
    };

    int cursorPosition() const;
    void setCursorPosition(int pos, MoveMode moveMode = MoveAnchor);

    void setModified(bool);
    bool isModified() const;

    int find(const QByteArray &pattern, int from = 0, QTextDocument::FindFlags findFlags = 0);

    void selectAll();
    void clear();

    void undo();
    void redo();

    Core::IEditor *editorInterface() const { return m_ieditor; }
    void setEditorInterface(Core::IEditor *ieditor) { m_ieditor = ieditor; }

    bool hasSelection() const { return m_cursorPosition != m_anchorPosition; }
    int selectionStart() const { return qMin(m_anchorPosition, m_cursorPosition); }
    int selectionEnd() const { return qMax(m_anchorPosition, m_cursorPosition); }

    bool event(QEvent*);

    bool isUndoAvailable() const { return m_undoStack.size(); }
    bool isRedoAvailable() const { return m_redoStack.size(); }

    QString addressString(uint address);


public Q_SLOTS:
    void setFontSettings(const TextEditor::FontSettings &fs);
    void highlightSearchResults(const QByteArray &pattern, QTextDocument::FindFlags findFlags = 0);
    void copy();

Q_SIGNALS:
    void modificationChanged(bool modified);
    void undoAvailable(bool);
    void redoAvailable(bool);
    void copyAvailable(bool);
    void cursorPositionChanged(int position);

protected:
    void scrollContentsBy(int dx, int dy);
    void paintEvent(QPaintEvent *e);
    void resizeEvent(QResizeEvent *);
    void changeEvent(QEvent *);
    void wheelEvent(QWheelEvent *e);
    void mousePressEvent(QMouseEvent *e);
    void mouseMoveEvent(QMouseEvent *e);
    void mouseReleaseEvent(QMouseEvent *e);
    void keyPressEvent(QKeyEvent *e);
    void focusInEvent(QFocusEvent *);
    void focusOutEvent(QFocusEvent *);
    void timerEvent(QTimerEvent *);

private:
    QByteArray m_data;
    int m_unmodifiedState;
    int m_margin;
    int m_descent;
    int m_ascent;
    int m_lineHeight;
    int m_charWidth;
    int m_labelWidth;
    int m_textWidth;
    int m_columnWidth;
    int m_numLines;
    int m_numVisibleLines;


    bool m_cursorVisible;
    int m_cursorPosition;
    int m_anchorPosition;
    bool m_hexCursor;
    bool m_lowNibble;
    bool m_isMonospacedFont;

    QByteArray m_searchPattern;
    QByteArray m_searchPatternHex;

    QBasicTimer m_cursorBlinkTimer;

    void init();
    int posAt(const QPoint &pos) const;
    bool inTextArea(const QPoint &pos) const;
    QRect cursorRect() const;
    void updateLines(int fromPosition = -1, int toPosition = -1);
    void ensureCursorVisible();
    void setBlinkingCursorEnabled(bool enable);

    void changeData(int position, uchar character, bool highNibble = false);

    int findPattern(const QByteArray &data, int from, int offset, int *match);
    void drawItems(QPainter *painter, int x, int y, const QString &itemString);

    struct BinEditorEditCommand {
        int position;
        uchar character;
        bool highNibble;
    };
    QStack<BinEditorEditCommand> m_undoStack, m_redoStack;

    QBasicTimer m_autoScrollTimer;
    Core::IEditor *m_ieditor;
    QString m_addressString;
};

} // namespace BINEditor

#endif // BINEDITOR_H