xref: /plan9/sys/src/cmd/eqn/diacrit.c (revision 3e12c5d1bb89fc02707907988834ef147769ddaf)
1 #include "e.h"
2 #include "y.tab.h"
3 
4 extern double Dvshift, Dhshift, Dh2shift, Dheight, Barv, Barh, Ubarv, Ubarh;
5 
diacrit(int p1,int type)6 void diacrit(int p1, int type)
7 {
8 	int c, t;
9 
10 	c = salloc();
11 	t = salloc();
12 	nrwid(p1, ps, p1);
13 	printf(".nr 10 %gm\n", max(REL(eht[p1]-ebase[p1]-1,ps), 0));	/* vert shift if high */
14 	if (type == HIGHBAR)
15 		printf(".nr 10 \\n(10+%gm\n", Dvshift);
16 	else if (type == LOWBAR)
17 		printf(".nr 10 0\n");
18 	else
19 		printf(".if \\n(ct>1 .nr 10 \\n(10+%gm\n", Dvshift);
20 	printf(".nr %d %gm\n", t, Dhshift);	/* horiz shift if high */
21 	printf(".if \\n(ct>1 .nr %d %gm\n", t, Dh2shift);	/* was .1 and .15 */
22 	switch (type) {
23 	case VEC:
24 		printf(".ds %d %s\n", c, lookup(deftbl, "vec_def")->cval);
25 		break;
26 	case DYAD:
27 		printf(".ds %d %s\n", c, lookup(deftbl, "dyad_def")->cval);
28 		break;
29 	case HAT:
30 		printf(".ds %d %s\n", c, lookup(deftbl, "hat_def")->cval);
31 		break;
32 	case TILDE:
33 		printf(".ds %d %s\n", c, lookup(deftbl, "tilde_def")->cval);
34 		break;
35 	case DOT:
36 		printf(".ds %d %s\n", c, lookup(deftbl, "dot_def")->cval);
37 		break;
38 	case DOTDOT:
39 		printf(".ds %d %s\n", c, lookup(deftbl, "dotdot_def")->cval);
40 		break;
41 	case BAR:
42 	case LOWBAR:
43 	case HIGHBAR:
44 		printf(".ds %d \\v'%gm'\\h'%gm'\\l'\\n(%du-%gm'\\h'%gm'\\v'%gm'\n",
45 			c, -Barv, Barh, p1, 2*Barh, Barh, Barv);
46 		break;
47 	case UNDER:
48 		printf(".ds %d \\v'%gm'\\l'\\n(%du-%gm\\(ul'\\h'%gm'\\v'%gm'\n",
49 			c, -Ubarv, p1, Ubarh, Ubarh, Ubarv);
50 		/* printf(".ds %d \\v'-%gm'\\l'\\n(%du\\(ul'\\v'%gm'\n",
51 			c, Ubarv, p1, Ubarv);
52 		*/
53 		printf(".nr %d 0\n", t);
54 		printf(".nr 10 0-.1m-%gm\n", REL(ebase[p1],ps));
55 		printf(".if \\n(ct%%2=1 .nr 10 0\\n(10-.1m\n");
56 		break;
57 	case UTILDE:
58 		printf(".ds %d %s\n", c, lookup(deftbl, "utilde_def")->cval);
59 		printf(".nr %d 0\n", t);
60 		printf(".nr 10 0-%gm\n", REL(ebase[p1],ps));
61 		printf(".if \\n(ct%%2=1 .nr 10 0\\n(10-%gm\n", 0.1);
62 		break;
63 	}
64 	nrwid(c, ps, c);
65 	if (lfont[p1] != ITAL)
66 		printf(".nr %d 0\n", t);
67 	printf(".as %d \\h'-\\n(%du-\\n(%du/2u+\\n(%du'\\v'0-\\n(10u'\\*(%d",
68 		p1, p1, c, t, c);
69 	printf("\\v'\\n(10u'\\h'-\\n(%du+\\n(%du/2u-\\n(%du'\n", c, p1, t);
70 	if (type != UNDER && type != UTILDE)
71 		eht[p1] += EM(Dheight, ps);	/* was .15 */
72 	dprintf(".\tdiacrit: %c over S%d, lf=%c, rf=%c, h=%g, b=%g\n",
73 		type, p1, lfont[p1], rfont[p1], eht[p1], ebase[p1]);
74 	sfree(c); sfree(t);
75 }
76