1 #ifndef lint
2 static char sccsid[] = "@(#)textgen.c	3.1 (CWI) 85/07/30";
3 #endif lint
4 
5 #include	<stdio.h>
6 #include	"pic.h"
7 #include	"y.tab.h"
8 
9 obj *textgen()
10 {
11 	int i, type, sub, nstr, at, with, hset;
12 	float xwith, ywith, h, w, x0, y0, x1, y1;
13 	obj *p, *ppos;
14 	static float prevh = 0;
15 	static float prevw = 0;
16 	Attr *ap;
17 
18 	sub = CENTER;
19 	at = with = nstr = hset = 0;
20 	h = getfval("textht");
21 	w = getfval("textwid");
22 	for (i = 0; i < nattr; i++) {
23 		ap = &attr[i];
24 		switch (ap->a_type) {
25 		case HEIGHT:
26 			h = ap->a_val.f;
27 			hset++;
28 			break;
29 		case WIDTH:
30 			w = ap->a_val.f;
31 			break;
32 		case WITH:
33 			with = ap->a_val.i;
34 			break;
35 		case AT:
36 			ppos = ap->a_val.o;
37 			curx = ppos->o_x;
38 			cury = ppos->o_y;
39 			at++;
40 			break;
41 		case TEXTATTR:
42 			sub = ap->a_sub;
43 			if (ap->a_val.p == NULL)	/* an isolated modifier */
44 				text[ntext-1].t_type = sub;
45 			else {
46 				savetext(sub, ap->a_val.p);
47 				nstr++;
48 			}
49 			break;
50 		}
51 	}
52 	if (hset == 0)		/* no explicit ht cmd */
53 		h *= nstr;
54 	if (with) {
55 		xwith = ywith = 0.0;
56 		switch (with) {
57 		case NORTH:	ywith = -h / 2; break;
58 		case SOUTH:	ywith = h / 2; break;
59 		case EAST:	xwith = -w / 2; break;
60 		case WEST:	xwith = w / 2; break;
61 		case NE:	xwith = -w / 2; ywith = -h / 2; break;
62 		case SE:	xwith = -w / 2; ywith = h / 2; break;
63 		case NW:	xwith = w / 2; ywith = -h / 2; break;
64 		case SW:	xwith = w / 2; ywith = h / 2; break;
65 		}
66 		curx += xwith;
67 		cury += ywith;
68 	}
69 	if (!at) {
70 		if (isright(hvmode))
71 			curx += w / 2;
72 		else if (isleft(hvmode))
73 			curx -= w / 2;
74 		else if (isup(hvmode))
75 			cury += h / 2;
76 		else
77 			cury -= h / 2;
78 	}
79 	x0 = curx - w / 2;
80 	y0 = cury - h / 2;
81 	x1 = curx + w / 2;
82 	y1 = cury + h / 2;
83 	extreme(x0, y0);
84 	extreme(x1, y1);
85 	dprintf("Text h %g w %g at %g,%g\n", h, w, curx, cury);
86 	p = makenode(TEXT, 2);
87 	p->o_val[0] = w;
88 	p->o_val[1] = h;
89 	if (isright(hvmode))
90 		curx = x1;
91 	else if (isleft(hvmode))
92 		curx = x0;
93 	else if (isup(hvmode))
94 		cury = y1;
95 	else
96 		cury = y0;
97 	prevh = h;
98 	prevw = w;
99 	return(p);
100 }
101 
102 obj *troffgen(s)	/* save away a string of troff commands */
103 	YYSTYPE s;
104 {
105 	savetext(CENTER, s.p);	/* use the existing text mechanism */
106 	return makenode(TROFF, 0);
107 }
108 
109 savetext(t, s)	/* record text elements for current object */
110 	int t;
111 	char *s;
112 {
113 	if (ntext >= ntextlist)
114 		text = (Text *) grow(text, "text", ntextlist += 200, sizeof(Text));
115 	text[ntext].t_type = t;
116 	text[ntext].t_val = s;
117 	dprintf("saving %d text %s at %d\n", t, s, ntext);
118 	ntext++;
119 }
120