/*
 *	Device independant tty interface for JOE
 *	Copyright
 *		(C) 1992 Joseph H. Allen
 *
 *	This file is part of JOE (Joe's Own Editor)
 */
#ifndef _JOE_SCRN_H
#define _JOE_SCRN_H 1

struct hentry {
	int	next;
	int	loc;
};

/* Each terminal has one of these: terminal capability database */

#ifdef __MSDOS__

struct scrn {
	int	li;		/* Height of screen */
	int	co;		/* Width of screen */
	short	*scrn;		/* Buffer */
	int	scroll;
	int	insdel;
	int	*updtab;	/* Lines which need to be updated */
	HIGHLIGHT_STATE *syntax;
	int	*compose;
	int	*sary;
};

#else

struct scrn {
	CAP	*cap;		/* Termcap/Terminfo data */

	int	li;		/* Screen height */
	int	co;		/* Screen width */

	unsigned char	*ti;		/* Initialization string */
	unsigned char	*cl;		/* Home and clear screen... really an
				   init. string */
	unsigned char	*cd;		/* Clear to end of screen */
	unsigned char	*te;		/* Restoration string */

	int	haz;		/* Terminal can't print ~s */
	int	os;		/* Terminal overstrikes */
	int	eo;		/* Can use blank to erase even if os */
	int	ul;		/* _ overstrikes */
	int	am;		/* Terminal has autowrap, but not magicwrap */
	int	xn;		/* Terminal has magicwrap */

	unsigned char	*so;		/* Enter standout (inverse) mode */
	unsigned char	*se;		/* Exit standout mode */

	unsigned char	*us;		/* Enter underline mode */
	unsigned char	*ue;		/* Exit underline mode */
	unsigned char	*uc;		/* Single time underline character */

	int	ms;		/* Ok to move when in standout/underline mode */

	unsigned char	*mb;		/* Enter blinking mode */
	unsigned char	*md;		/* Enter bold mode */
	unsigned char	*mh;		/* Enter dim mode */
	unsigned char	*mr;		/* Enter inverse mode */
	unsigned char	*me;		/* Exit above modes */

	unsigned char	*Sb;		/* Set background color */
	unsigned char	*Sf;		/* Set foregrond color */
	int	Co;			/* No. of colors */
	int	ut;		/* Screen erases with background color */

	int	da, db;		/* Extra lines exist above, below */
	unsigned char	*al, *dl, *AL, *DL;	/* Insert/delete lines */
	unsigned char	*cs;		/* Set scrolling region */
	int	rr;		/* Set for scrolling region relative addressing */
	unsigned char	*sf, *SF, *sr, *SR;	/* Scroll */

	unsigned char	*dm, *dc, *DC, *ed;	/* Delete characters */
	unsigned char	*im, *ic, *IC, *ip, *ei;	/* Insert characters */
	int	mi;		/* Set if ok to move while in insert mode */

	unsigned char	*bs;		/* Move cursor left 1 */
	int	cbs;
	unsigned char	*lf;		/* Move cursor down 1 */
	int	clf;
	unsigned char	*up;		/* Move cursor up 1 */
	int	cup;
	unsigned char	*nd;		/* Move cursor right 1 */

	unsigned char	*ta;		/* Move cursor to next tab stop */
	int	cta;
	unsigned char	*bt;		/* Move cursor to previous tab stop */
	int	cbt;
	int	tw;		/* Tab width */

	unsigned char	*ho;		/* Home cursor to upper left */
	int	cho;
	unsigned char	*ll;		/* Home cursor to lower left */
	int	cll;
	unsigned char	*cr;		/* Move cursor to left edge */
	int	ccr;
	unsigned char	*RI;		/* Move cursor right n */
	int	cRI;
	unsigned char	*LE;		/* Move cursor left n */
	int	cLE;
	unsigned char	*UP;		/* Move cursor up n */
	int	cUP;
	unsigned char	*DO;		/* Move cursor down n */
	int	cDO;
	unsigned char	*ch;		/* Set cursor column */
	int	cch;
	unsigned char	*cv;		/* Set cursor row */
	int	ccv;
	unsigned char	*cV;		/* Goto beginning of specified line */
	int	ccV;
	unsigned char	*cm;		/* Set cursor row and column */
	int	ccm;

	unsigned char	*ce;		/* Clear to end of line */
	int	cce;

	int assume_256;		/* Assume terminal has 256 color mode, but use
	                           regular mode for standard colors just in case */

	/* Basic abilities */
	int	scroll;		/* Set to use scrolling */
	int	insdel;		/* Set to use insert/delete within line */

	/* Current state of terminal */
	int	*scrn;		/* Characters on screen */
	int	*attr;		/* Attributes on screen */
	int	x, y;		/* Current cursor position (-1 for unknown) */
	int	top, bot;	/* Current scrolling region */
	int	attrib;		/* Current character attributes */
	int	ins;		/* Set if we're in insert mode */

	int	*updtab;	/* Dirty lines table */
	int	avattr;		/* Bits set for available attributes */
	int	*sary;		/* Scroll buffer array */

	int	*compose;	/* Line compose buffer */
	int	*ofst;		/* stuff for magic */
	struct hentry	*htab;
	struct hentry	*ary;
};

#endif

extern int skiptop;

/* SCRN *nopen(void);
 *
 * Open the screen (sets TTY mode so that screen may be used immediatly after
 * the 'nopen').
 */
SCRN *nopen PARAMS((CAP *cap));

/* void nresize(SCRN *t,int w,int h);
 *
 * Change size of screen.  For example, call this when you find out that
 * the Xterm changed size.
 */
void nresize PARAMS((SCRN *t, int w, int h));

/* void nredraw(SCRN *t);
 *
 * Invalidate all state variables for the terminal.  This way, everything gets
 * redrawn.
 */
void nredraw PARAMS((SCRN *t));

void npartial PARAMS((SCRN *t));
void nescape PARAMS((SCRN *t));
void nreturn PARAMS((SCRN *t));

/* void nclose(SCRN *t);
 *
 * Close the screen and restore TTY to initial state.
 *
 * if 'flg' is set, tclose doesn't mess with the signals.
 */
void nclose PARAMS((SCRN *t));

/* int cpos(SCRN *t,int x,int y);
 *
 * Set cursor position
 */
int cpos PARAMS((register SCRN *t, register int x, register int y));

/* int attr(SCRN *t,int a);
 *
 * Set attributes
 */
int set_attr PARAMS((SCRN *t, int c));

/* Encode character as utf8 */
void utf8_putc PARAMS((int c));

/* void outatr(SCRN *t,int *scrn,int *attr,int x,int y,int c,int a);
 *
 * Output a character at the given screen cooridinate.  The cursor position
 * after this function is executed is indeterminate.
 */

/* Character attribute bits */

#ifdef __MSDOS__

#define INVERSE 1
#define UNDERLINE 2
#define BOLD 4
#define BLINK 8
#define DIM 16
extern unsigned atab[];

#define outatr(t,scrn,attr,x,y,c,a) do { \
	(t); \
	(x); \
	(y); \
	*(scrn) = ((unsigned)(c) | atab[a]); \
} while(0)

#else

#define INVERSE		 256
#define UNDERLINE	 512
#define BOLD		1024
#define BLINK		2048
#define DIM		4096
#define AT_MASK		(INVERSE+UNDERLINE+BOLD+BLINK+DIM)

#define BG_SHIFT	13
#define BG_VALUE	(255<<BG_SHIFT)
#define BG_NOT_DEFAULT	(256<<BG_SHIFT)
#define BG_MASK		(511<<BG_SHIFT)

#define BG_DEFAULT	(0<<BG_SHIFT)

/* #define BG_COLOR(color)	(BG_NOT_DEFAULT^(color)<<BG_SHIFT) */
#define BG_COLOR(color)	(color)

#define BG_BLACK	(BG_NOT_DEFAULT|(0<<BG_SHIFT))
#define BG_RED		(BG_NOT_DEFAULT|(1<<BG_SHIFT))
#define BG_GREEN	(BG_NOT_DEFAULT|(2<<BG_SHIFT))
#define BG_YELLOW	(BG_NOT_DEFAULT|(3<<BG_SHIFT))
#define BG_BLUE		(BG_NOT_DEFAULT|(4<<BG_SHIFT))
#define BG_MAGENTA	(BG_NOT_DEFAULT|(5<<BG_SHIFT))
#define BG_CYAN		(BG_NOT_DEFAULT|(6<<BG_SHIFT))
#define BG_WHITE	(BG_NOT_DEFAULT|(7<<BG_SHIFT))
#define BG_BBLACK	(BG_NOT_DEFAULT|(8<<BG_SHIFT))
#define BG_BRED		(BG_NOT_DEFAULT|(9<<BG_SHIFT))
#define BG_BGREEN	(BG_NOT_DEFAULT|(10<<BG_SHIFT))
#define BG_BYELLOW	(BG_NOT_DEFAULT|(11<<BG_SHIFT))
#define BG_BBLUE	(BG_NOT_DEFAULT|(12<<BG_SHIFT))
#define BG_BMAGENTA	(BG_NOT_DEFAULT|(13<<BG_SHIFT))
#define BG_BCYAN	(BG_NOT_DEFAULT|(14<<BG_SHIFT))
#define BG_BWHITE	(BG_NOT_DEFAULT|(15<<BG_SHIFT))

#define FG_SHIFT	22
#define FG_VALUE	(255<<FG_SHIFT)
#define FG_NOT_DEFAULT	(256<<FG_SHIFT)
#define FG_MASK		(511<<FG_SHIFT)

#define FG_DEFAULT	(0<<FG_SHIFT)
#define FG_BWHITE	(FG_NOT_DEFAULT|(15<<FG_SHIFT))
#define FG_BCYAN	(FG_NOT_DEFAULT|(14<<FG_SHIFT))
#define FG_BMAGENTA	(FG_NOT_DEFAULT|(13<<FG_SHIFT))
#define FG_BBLUE	(FG_NOT_DEFAULT|(12<<FG_SHIFT))
#define FG_BYELLOW	(FG_NOT_DEFAULT|(11<<FG_SHIFT))
#define FG_BGREEN	(FG_NOT_DEFAULT|(10<<FG_SHIFT))
#define FG_BRED		(FG_NOT_DEFAULT|(9<<FG_SHIFT))
#define FG_BBLACK	(FG_NOT_DEFAULT|(8<<FG_SHIFT))
#define FG_WHITE	(FG_NOT_DEFAULT|(7<<FG_SHIFT))
#define FG_CYAN		(FG_NOT_DEFAULT|(6<<FG_SHIFT))
#define FG_MAGENTA	(FG_NOT_DEFAULT|(5<<FG_SHIFT))
#define FG_BLUE		(FG_NOT_DEFAULT|(4<<FG_SHIFT))
#define FG_YELLOW	(FG_NOT_DEFAULT|(3<<FG_SHIFT))
#define FG_GREEN	(FG_NOT_DEFAULT|(2<<FG_SHIFT))
#define FG_RED		(FG_NOT_DEFAULT|(1<<FG_SHIFT))
#define FG_BLACK	(FG_NOT_DEFAULT|(0<<FG_SHIFT))

void outatr PARAMS((struct charmap *map,SCRN *t,int *scrn,int *attrf,int xx,int yy,int c,int a));

#endif

/*
 * translate character and its attribute into something printable
 */
void xlat PARAMS((int *attr, unsigned char *c));
void xlat_utf_ctrl PARAMS((int *attr, unsigned char *c));

/* int eraeol(SCRN *t,int x,int y);
 *
 * Erase from screen coordinate to end of line.
 */
int eraeol PARAMS((SCRN *t, int x, int y, int atr));

/* void nscrlup(SCRN *t,int top,int bot,int amnt);
 *
 * Buffered scroll request.  Request that some lines up.  'top' and 'bot'
 * indicate which lines to scroll.  'bot' is the last line to scroll + 1.
 * 'amnt' is distance in lines to scroll.
 */
void nscrlup PARAMS((SCRN *t, int top, int bot, int amnt));

/* void nscrldn(SCRN *t,int top,int bot,int amnt);
 *
 * Buffered scroll request.  Scroll some lines down.  'top' and 'bot'
 * indicate which lines to scroll.  'bot' is the last line to scroll + 1.
 * 'amnt' is distance in lines to scroll.
 */
void nscrldn PARAMS((SCRN *t, int top, int bot, int amnt));

/* void nscroll(SCRN *t);
 *
 * Execute buffered scroll requests
 */
void nscroll PARAMS((SCRN *t, int atr));

/* void magic(SCRN *t,int y,int *cur,int *new);
 *
 * Figure out and execute line shifting
 */
void magic PARAMS((SCRN *t, int y, int *cs, int *ca, int *s, int *a,int placex));

int clrins PARAMS((SCRN *t));

int meta_color PARAMS((unsigned char *s));

/* Generate a field */
void genfield PARAMS((SCRN *t,int *scrn,int *attr,int x,int y,int ofst,unsigned char *s,int len,int atr,int width,int flg,int *fmt));

/* Column width of a string takes into account utf-8) */
int txtwidth PARAMS((unsigned char *s,int len));

int txtwidth1 PARAMS((struct charmap *map, int tabwidth, unsigned char *s, int len));

/* Generate a field: formatted */
void genfmt PARAMS((SCRN *t, int x, int y, int ofst, unsigned char *s, int atr, int flg));

/* Column width of formatted string */
int fmtlen PARAMS((unsigned char *s));

/* Offset within formatted string of particular column */
int fmtpos PARAMS((unsigned char *s, int goal));

extern int bg_text;
extern int columns;
extern int notite;
extern int usetabs;
extern int assume_color;
extern int assume_256color;

#endif