39 lines
823 B
C++
39 lines
823 B
C++
|
/*
|
||
|
|
* @Description:
|
||
|
|
* @version:
|
||
|
|
* @Author: 莫邪
|
||
|
|
* @Date: 2023-11-02 09:26:30
|
||
|
|
* @LastEditors: 莫邪
|
||
|
|
* @LastEditTime: 2023-11-02 10:00:03
|
||
|
|
*/
|
||
|
|
#include <memory>
|
||
|
|
|
||
|
|
#include "iostream"
|
||
|
|
|
||
|
|
class TextMemento;
|
||
|
|
|
||
|
|
// 编辑器
|
||
|
|
class TextEdit {
|
||
|
|
std::string text_;
|
||
|
|
public:
|
||
|
|
void AddText(const std::string &text);
|
||
|
|
const std::string& GetText();
|
||
|
|
std::shared_ptr<TextMemento> CreateMemento() ;
|
||
|
|
void RestoreMemento(std::shared_ptr<TextMemento> memento) ;
|
||
|
|
};
|
||
|
|
// 备忘录(快照)
|
||
|
|
class TextMemento {
|
||
|
|
std::string text_;
|
||
|
|
public:
|
||
|
|
TextMemento(TextEdit &textEdit);
|
||
|
|
std::string GetText() ;
|
||
|
|
};
|
||
|
|
|
||
|
|
// 快照管理
|
||
|
|
class MementoManager {
|
||
|
|
std::vector<std::shared_ptr<TextMemento>> memento_list_;
|
||
|
|
public:
|
||
|
|
void AddMemento(std::shared_ptr<TextMemento> memento) ;
|
||
|
|
std::shared_ptr<TextMemento> GetLastMemento() ;
|
||
|
|
void Undo() ;
|
||
|
|
};
|