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screen.h

/*
 * This module is all new by Robert Nation
 * (nation@rocket.sanders.lockheed.com).
 *
 * As usual, the author accepts no responsibility for anything, nor does
 * he guarantee anything whatsoever.
 */

#ifndef __GNUC__
#define  inline  /*nothing*/
#endif /*__GNUC__*/

typedef struct _win_info
{
  /* window width and height in pixels */
  int pwidth,pheight;
  /* window width and height in characters */
  int cwidth, cheight;
  /* font width and height in pixels */
  int fwidth, fheight;
  /* total lines to save in scroll-back buffer */
  int saved_lines;
  /* how far back we are in the scroll back buffer */
  int offset;
  /* high water mark of saved scrolled lines */
  int sline_top;
} WindowInfo;

typedef struct _screen_info
{
  /* All text including the scroll back buffer.
   * each line is a fixed length == cwidth+1
   * last character is 0 for non-wrapped lines,
   * 1 otherwise */
  unsigned char *text;
  /* renditions, using flags defined later */
#ifdef COLOR
  unsigned int *rendition;
#else
  unsigned char *rendition;
#endif
  /* cursor position */
  int row,col;
  /* top and bottom scroll margins */
  int tmargin,bmargin;
  /* origin mode flag */
  int decom;
  /* auto-wrap flag */
  int wrap;
  /* need to wrap for next char? */
  int wrap_next;
  /* insert mode (vs. replace mode) */
  int insert;
  /* character set number (0,1) */
  int charset;
} ScreenInfo;

#define NSCREENS 2

/* Screen refresh methods */
#define DONT_BOTHER 2     /* Window not visible at all! */
#define SLOW 1           /* No Bitblt */
#define FAST 0

/*  flags for scr_move()
 */
#define COL_RELATIVE    1     /* column movement is relative */
#define ROW_RELATIVE    2     /* row movement is relative */

/*  arguments to the screen delete functions
 */
#define END 0
#define START     1
#define ENTIRE    2

/* modes for scr_insert_delete_lines()
 */
#define INSERT -1
#define DELETE 1

/* modes for scr_move_up_down
 */
#define UP 1
#define DOWN -1

/*  rendition style flags.
 */
#define RS_NONE         0     /* Normal */
#define RS_BOLD         1     /* Bold face */
#define RS_ULINE  2     /* underline */
#define RS_CURSOR 4     /* cursor location */
#define RS_RVID         8     /* reverse video */
#define RS_BLINK       32     /* blink */
#define RS_GRFONT      0x1000000  /* graphics character set */
#define RS_SELECTED    64       /* graphics character set */
#define B1st    16
#define B2nd    128
#define BCH     (B1st|B2nd)

/* Cursor on/off statuses
 */
#define ON 1
#define OFF 0

#define SEL_SET 1
#define SEL_CLR 0

#define SELDIR_POS 1
#define SELDIR_NEG -1

#define SELECTION_CLEAR 0
#define SELECTION_BEGIN 1
#define SELECTION_INIT 2
#define SELECTION_ONGOING 3
#define SELECTION_COMPLETE 4

void scr_init(void);
void scr_reset(void);
void scr_power_on(void);
void scr_backspace(void);
void scr_change_screen(int);
void scr_change_rendition(int,int);
void scr_get_size(int *,int *);
void scr_focus(int);
inline void scr_add_character(int c);
void scr_add_lines(unsigned char *c,int nl_count,int n);
void scr_move(int,int,int);
void scr_index(int);
void scr_save_cursor(void);
void scr_restore_cursor(void);
void scr_erase_line(int);
void scr_erase_screen(int);
void scr_insert_delete_lines(int,int);
void scr_insert_delete_characters(int,int);
void scr_set_margins(int,int);
void scr_set_wrap(int);
void scr_set_decom(int);
void scr_set_insert(int);
void scr_move_to(int);
void scr_move_up_down(int);
void scr_make_selection(int);
void scr_send_selection(XSelectionRequestEvent *);
void scr_request_selection(int,int,int);
void scr_paste_primary(int,int,int);
void scr_clear_selection(void);
void scr_clear_selection2(void);
void scr_extend_selection(int,int);
void scr_start_selection(int,int);
void scr_report_position(void);
void scr_refresh(int,int,int,int);
void scr_set_charset(int set,unsigned char a);
void scr_choose_charset(int set);
void refresh(void);
inline void check_selection(int row, int col);
inline void check_selection2(int row, int col);
void scr_secure(void);
void set_font_style(void);
int  scroll(int row1,int row2,int count);
void scr_set_tab(int value);
void scr_E(void);
void scr_rev_vid(int mode);
void blink_refresh();

int cursor_rr(void);
int cursor_ll(void);
void scr_delete_selection(void);
void multiple_click_event(int clicks, int x, int y);
void scr_fore_color(int color);
void scr_back_color(int color);

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