fancy.c

早期freebsd实现

}

fixcol (r,c,l,ch,inc)
register int	l, ch;
int		r, c, inc;

{
	register int	i;

	curmove (r,c);
	fancyc (ch);
	for (i = 1; i < l; i++)  {
		curmove (curr+inc,curc-1);
		fancyc (ch);
	}
}

curmove (r,c)
register int	r, c;

{
	if (curr == r && curc == c)
		return;
	if (realr == -1)  {
		realr = curr;
		realc = curc;
	}
	curr = r;
	curc = c;
}

newpos ()  {
	register int	r;		/* destination row */
	register int	c;		/* destination column */
	register int	mode = -1;	/* mode of movement */

	int	count = 1000;		/* character count */
	int	i;			/* index */
	int	j;			/* index */
	int	n;			/* temporary variable */
	char	*m;			/* string containing CM movement */


	if (realr == -1)		/* see if already there */
		return;

	r = curr;			/* set current and dest. positions */
	c = curc;
	curr = realr;
	curc = realc;

					/* double check position */
	if (curr == r && curc == c)  {
		realr = realc = -1;
		return;
	}

	if (CM)  {			/* try CM to get there */
		mode = 0;
		m = (char *)tgoto (CM,c,r);
		count = strlen (m);
	}

					/* try HO and local movement */
	if (HO && (n = r+c*lND+lHO) < count)  {
		mode = 1;
		count = n;
	}

					/* try various LF combinations */
	if (r >= curr)  {
						/* CR, LF, and ND */
		if ((n = (r-curr)+c*lND+1) < count)  {
			mode = 2;
			count = n;
		}
						/* LF, ND */
		if (c >= curc && (n = (r-curr)+(c-curc)*lND) < count)  {
			mode = 3;
			count = n;
		}
						/* LF, BS */
		if (c < curc && (n = (r-curr)+(curc-c)*lBC) < count)  {
			mode = 4;
			count = n;
		}
	}

					/* try corresponding UP combinations */
	if (r < curr)  {
						/* CR, UP, and ND */
		if ((n = (curr-r)*lUP+c*lND+1) < count)  {
			mode = 5;
			count = n;
		}
						/* UP and ND */
		if (c >= curc && (n = (curr-r)*lUP+(c-curc)*lND) < count)  {
			mode = 6;
			count = n;
		}
						/* UP and BS */
		if (c < curc && (n = (curr-r)*lUP+(curc-c)*lBC) < count)  {
			mode = 7;
			count = n;
		}
	}

						/* space over */
	if (curr == r && c > curc && linect[r] < curc && c-curc < count)
		mode = 8;

	switch (mode)  {

	case -1:				/* error! */
		write (2,"\r\nInternal cursor error.\r\n",26);
		getout();

						/* direct cursor motion */
	case  0:
		tputs (m,abs(curr-r),addbuf);
		break;

						/* relative to "home" */
	case  1:
		tputs (HO,r,addbuf);
		for (i = 0; i < r; i++)
			addbuf ('\012');
		for (i = 0; i < c; i++)
			tputs (ND,1,addbuf);
		break;

						/* CR and down and over */
	case  2:
		addbuf ('\015');
		for (i = 0; i < r-curr; i++)
			addbuf ('\012');
		for (i = 0; i < c; i++)
			tputs (ND,1,addbuf);
		break;
	
						/* down and over */
	case  3:
		for (i = 0; i < r-curr; i++)
			addbuf ('\012');
		for (i = 0; i < c-curc; i++)
			tputs (ND,1,addbuf);
		break;
	
						/* down and back */
	case  4:
		for (i = 0; i < r-curr; i++)
			addbuf ('\012');
		for (i = 0; i < curc-c; i++)
			addbuf ('\010');
		break;
	
						/* CR and up and over */
	case  5:
		addbuf ('\015');
		for (i = 0; i < curr-r; i++)
			tputs (UP,1,addbuf);
		for (i = 0; i < c; i++)
			tputs (ND,1,addbuf);
		break;
	
						/* up and over */
	case  6:
		for (i = 0; i < curr-r; i++)
			tputs (UP,1,addbuf);
		for (i = 0; i < c-curc; i++)
			tputs (ND,1,addbuf);
		break;
	
						/* up and back */
	case  7:
		for (i = 0; i < curr-r; i++)
			tputs (UP,1,addbuf);
		for (i = 0; i < curc-c; i++)  {
			if (BC)
				tputs (BC,1,addbuf);
			else
				addbuf ('\010');
		}
		break;

						/* safe space */
	case  8:
		for (i = 0; i < c-curc; i++)
			addbuf (' ');
	}

						/* fix positions */
	curr = r;
	curc = c;
	realr = -1;
	realc = -1;
}

clear ()  {
	register int	i;

					/* double space if can't clear */
	if (CL == 0)  {
		writel ("\n\n");
		return;
	}

	curr = curc = 0;		/* fix position markers */
	realr = realc = -1;
	for (i = 0; i < 24; i++)	/* clear line counts */
		linect[i] = -1;
	buffnum = -1;			/* ignore leftover buffer contents */
	tputs (CL,CO,addbuf);		/* put CL in buffer */
}

tos ()  {				/* home cursor */
	curmove (0,0);
}

fancyc (c)
register char	c;			/* character to output */
{
	register int	sp;		/* counts spaces in a tab */

	if (c == '\007')  {		/* bells go in blindly */
		addbuf (c);
		return;
	}

					/* process tabs, use spaces if the
					 * the tab should be erasing things,
					 * otherwise use cursor movement
					 * routines.  Note this does not use
					 * hardware tabs at all. */
	if (c == '\t')  {
		sp = (curc+8) & (~ 7);		/* compute spaces */
						/* check line length */
		if (linect[curr] >= curc || sp < 4)  {
			for (; sp > curc; sp--)
				addbuf (' ');
			curc = sp;		/* fix curc */
		} else
			curmove (curr,sp);
		return;
	}

					/* do newline be calling newline */
	if (c == '\n')  {
		newline();
		return;
	}

					/* ignore any other control chars */
	if (c < ' ')
		return;

					/* if an erasing space or non-space,
					 * just add it to buffer.  Otherwise
					 * use cursor movement routine, so that
					 * multiple spaces will be grouped
					 * together */
	if (c > ' ' || linect[curr] >= curc)  {
		newpos ();			/* make sure position correct */
		addbuf (c);			/* add character to buffer */
						/* fix line length */
		if (c == ' ' && linect[curr] == curc)
			linect[curr]--;
		else if (linect[curr] < curc)
			linect[curr] = curc;
		curc++;				/* fix curc */
	} else
					/* use cursor movement routine */
		curmove (curr,curc+1);
}

clend()  {
	register int	i;
	register char	*s;


	if (CD)  {
		tputs (CD,CO-curr,addbuf);
		for (i = curr; i < LI; i++)
			linect[i] = -1;
		return;
	}

	curmove (i = curr,0);
	cline();
	while (curr < LI-1)  {
		curmove (curr+1,0);
		if (linect[curr] > -1)
			cline ();
	}
	curmove (i,0);
}

cline ()  {
	register int	i;
	register int	c;
	register char	*s;

	if (curc > linect[curr])
		return;
	newpos ();
	if (CE)  {
		tputs (CE,1,addbuf);
		linect[curr] = curc-1;
	} else  {
		c = curc-1;
		while (linect[curr] > c)  {
			addbuf (' ');
			curc++;
			linect[curr]--;
		}
		curmove (curr,c+1);
	}
}

newline ()  {
	cline();
	if (curr == LI-1)
		curmove (begscr,0);
	else
		curmove (curr+1,0);
}

getcaps (s)
register char	*s;

{
	register char	*code;		/* two letter code */
	register char	***cap;		/* pointer to cap string */
	char		*bufp;		/* pointer to cap buffer */
	char		tentry[1024];	/* temporary uncoded caps buffer */

	tgetent (tentry,s);		/* get uncoded termcap entry */

	LI = tgetnum ("li");		/* get number of lines */
	if (LI == -1)
		LI = 12;
	CO = tgetnum ("co");		/* get number of columns */
	if (CO == -1)
		CO = 65;

	bufp = tbuf;			/* get padding character */
	tgetstr ("pc",&bufp);
	if (bufp != tbuf)
		PC = *tbuf;
	else
		PC = 0;

	bufp = tbuf;			/* get string entries */
	cap = tstr;
	for (code = tcap; *code; code += 2)
		**cap++ = (char *)tgetstr (code,&bufp);

					/* get pertinent lengths */
	if (HO)
		lHO = strlen (HO);
	if (BC)
		lBC = strlen (BC);
	else
		lBC = 1;
	if (UP)
		lUP = strlen (UP);
	if (ND)
		lND = strlen (ND);
	if (LI < 24 || CO < 72 || !(CL && UP && ND))
		return (0);
	linect = (int *)calloc (LI+1,sizeof(int));
	return (1);
}