commands.h
70 lines
| 1.9 KiB
| text/x-c
|
CLexer
Jeandet Alexis
|
r0 | #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 | ||||