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#ifndef COMMANDS_H
#define COMMANDS_H
/** \cond docNever */
#include <QUndoCommand>
#include "xbytearray.h"
/*! CharCommand is a class to prived undo/redo functionality in QHexEdit.
A QUndoCommand represents a single editing action on a document. CharCommand
is responsable for manipulations on single chars. It can insert. replace and
remove characters. A manipulation stores allways to actions
1. redo (or do) action
2. undo action.
CharCommand also supports command compression via mergeWidht(). This allows
the user to execute a undo command contation e.g. 3 steps in a single command.
If you for example insert a new byt "34" this means for the editor doing 3
steps: insert a "00", replace it with "03" and the replace it with "34". These
3 steps are combined into a single step, insert a "34".
*/
class CharCommand : public QUndoCommand
{
public:
enum { Id = 1234 };
enum Cmd {insert, remove, replace};
CharCommand(XByteArray * xData, Cmd cmd, int charPos, char newChar,
QUndoCommand *parent=0);
void undo();
void redo();
bool mergeWith(const QUndoCommand *command);
int id() const { return Id; }
private:
XByteArray * _xData;
int _charPos;
bool _wasChanged;
char _newChar;
char _oldChar;
Cmd _cmd;
};
/*! ArrayCommand provides undo/redo functionality for handling binary strings. It
can undo/redo insert, replace and remove binary strins (QByteArrays).
*/
class ArrayCommand : public QUndoCommand
{
public:
enum Cmd {insert, remove, replace};
ArrayCommand(XByteArray * xData, Cmd cmd, int baPos, QByteArray newBa=QByteArray(), int len=0,
QUndoCommand *parent=0);
void undo();
void redo();
private:
Cmd _cmd;
XByteArray * _xData;
int _baPos;
int _len;
QByteArray _wasChanged;
QByteArray _newBa;
QByteArray _oldBa;
};
/** \endcond docNever */
#endif // COMMANDS_H
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