forked from eden-emu/eden
70 lines
1.9 KiB
C++
70 lines
1.9 KiB
C++
#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
|