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lecture-operating-system-de…/c_os/devices/BufferedCGA.h

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C++
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#ifndef __BUFFEREDCGA_INCLUDE_H_
#define __BUFFEREDCGA_INCLUDE_H_
#include "devices/CGA.h"
#include "devices/Keyboard.h"
#include "lib/ScrollbackBuffer.h"
// NOTE: I added this file
class BufferedCGA : public CGA {
private:
ScrollbackBuffer* scrollback_buffer;
bool initialized; // Don't do ScrollbackBuffer actions if not initialized
BufferedCGA(const CGA& copy);
void displaypage(); // Write the current_page to CGA memory
public:
BufferedCGA() : CGA(), initialized(false), current_page(0) {};
void init(); // Scrollback needs to be initialized after memorymanagement
unsigned char current_page; // The page that is displayed
void scroll_page_backward(); // Scroll up the page history
void scroll_page_forward(); // Scroll down the page history (to the current page)
void print(char* string, int n, unsigned char attrib = STD_ATTR) override;
void scrollup() override;
void clear() override;
};
#endif