#ifndef _CONSOLE_H_
#define _CONSOLE_H_

#include <SupportDefs.h>

#define TAB_SIZE 8
#define TAB_MASK 7

#define FMASK 0x0f
#define BMASK 0x70

typedef enum {
        CONSOLE_STATE_NORMAL = 0,
        CONSOLE_STATE_GOT_ESCAPE,
        CONSOLE_STATE_SEEN_BRACKET,
        CONSOLE_STATE_NEW_ARG,
        CONSOLE_STATE_PARSING_ARG,
} console_state;

typedef enum {
        SCREEN_ERASE_WHOLE,
        SCREEN_ERASE_UP,
        SCREEN_ERASE_DOWN
} erase_screen_mode;

typedef enum {
        LINE_ERASE_WHOLE,
        LINE_ERASE_LEFT,
        LINE_ERASE_RIGHT
} erase_line_mode;

#define MAX_ARGS 8

class ViewBuffer;

class Console {
public:
                                                        Console(ViewBuffer *output);
                                                        ~Console();

                void                            ResetConsole();

                void                            SetScrollRegion(int top, int bottom);
                void                            ScrollUp();
                void                            ScrollDown();

                void                            LineFeed();
                void                            RLineFeed();
                void                            CariageReturn();

                void                            Delete();
                void                            Tab();

                void                            EraseLine(erase_line_mode mode);
                void                            EraseScreen(erase_screen_mode mode);

                void                            SaveCursor(bool save_attrs);
                void                            RestoreCursor(bool restore_attrs);
                void                            UpdateCursor(int x, int y);
                void                            GotoXY(int new_x, int new_y);

                void                            PutChar(const char c);

                void                            SetVT100Attributes(int32 *args, int32 argCount);
                bool                            ProcessVT100Command(const char c, bool seen_bracket, int32 *args, int32 argCount);

                void                            Write(const void *buf, size_t len);

private:
static  void                            ResizeCallback(int32 width, int32 height, void *data);

                int32                           fLines;
                int32                           fColumns;

                uint8                           fAttr;
                uint8                           fSavedAttr;
                bool                            fBrightAttr;
                bool                            fReverseAttr;

                int32                           fX;                             // current x coordinate
                int32                           fY;                             // current y coordinate
                int32                           fSavedX;                // used to save x and y
                int32                           fSavedY;

                int32                           fScrollTop;             // top of the scroll region
                int32                           fScrollBottom;  // bottom of the scroll region

                /* state machine */
                console_state           fState;
                int32                           fArgCount;
                int32                           fArgs[MAX_ARGS];

                ViewBuffer                      *fOutput;
};

#endif