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WebSVN – planix.SVN – Blame – /os/branches/feature_tlsv12/sys/src/cmd/pic/textgen.c – Rev 2

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#include	<stdio.h>
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#include	"pic.h"
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#include	"y.tab.h"
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obj *textgen(void)
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{
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	int i, sub, nstr, at, with, hset, invis;
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	double xwith, ywith, h, w, x0, y0, x1, y1;
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	obj *p, *ppos;
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	static double prevh = 0;
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	static double prevw = 0;
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	Attr *ap;
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	at = with = nstr = hset = invis = 0;
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	h = getfval("textht");
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	w = getfval("textwid");
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	for (i = 0; i < nattr; i++) {
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		ap = &attr[i];
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		switch (ap->a_type) {
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		case HEIGHT:
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			h = ap->a_val.f;
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			hset++;
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			break;
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		case WIDTH:
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			w = ap->a_val.f;
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			break;
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		case WITH:
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			with = ap->a_val.i;
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			break;
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		case INVIS:
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			invis = INVIS;
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			break;
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		case AT:
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			ppos = ap->a_val.o;
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			curx = ppos->o_x;
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			cury = ppos->o_y;
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			at++;
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			break;
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		case TEXTATTR:
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			sub = ap->a_sub;
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			if (ap->a_val.p == NULL)	/* an isolated modifier */
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				text[ntext-1].t_type = sub;
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			else {
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				savetext(sub, ap->a_val.p);
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				nstr++;
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			}
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			break;
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		}
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	}
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	if (hset == 0)		/* no explicit ht cmd */
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		h *= nstr;
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	if (with) {
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		xwith = ywith = 0.0;
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		switch (with) {
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		case NORTH:	ywith = -h / 2; break;
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		case SOUTH:	ywith = h / 2; break;
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		case EAST:	xwith = -w / 2; break;
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		case WEST:	xwith = w / 2; break;
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		case NE:	xwith = -w / 2; ywith = -h / 2; break;
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		case SE:	xwith = -w / 2; ywith = h / 2; break;
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		case NW:	xwith = w / 2; ywith = -h / 2; break;
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		case SW:	xwith = w / 2; ywith = h / 2; break;
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		}
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		curx += xwith;
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		cury += ywith;
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	}
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	if (!at) {
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		if (isright(hvmode))
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			curx += w / 2;
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		else if (isleft(hvmode))
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			curx -= w / 2;
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		else if (isup(hvmode))
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			cury += h / 2;
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		else
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			cury -= h / 2;
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	}
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	x0 = curx - w / 2;
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	y0 = cury - h / 2;
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	x1 = curx + w / 2;
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	y1 = cury + h / 2;
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	extreme(x0, y0);
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	extreme(x1, y1);
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	dprintf("Text h %g w %g at %g,%g\n", h, w, curx, cury);
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	p = makenode(TEXT, 2);
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	p->o_attr = invis;
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	p->o_val[0] = w;
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	p->o_val[1] = h;
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	if (isright(hvmode))
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		curx = x1;
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	else if (isleft(hvmode))
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		curx = x0;
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	else if (isup(hvmode))
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		cury = y1;
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	else
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		cury = y0;
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	prevh = h;
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	prevw = w;
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	return(p);
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}
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obj *troffgen(char *s)	/* save away a string of troff commands */
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{
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	savetext(CENTER, s);	/* use the existing text mechanism */
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	return makenode(TROFF, 0);
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}
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void savetext(int t, char *s)	/* record text elements for current object */
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{
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	if (ntext >= ntextlist)
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		text = (Text *) grow((char *) text, "text", ntextlist += 200, sizeof(Text));
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	text[ntext].t_type = t;
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	text[ntext].t_val = s;
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	dprintf("saving %d text %s at %d\n", t, s, ntext);
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	ntext++;
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}