Annotation of mandoc/roff_term.c, Revision 1.6
1.1 schwarze 1: /* $OpenBSD$ */
2: /*
1.4 schwarze 3: * Copyright (c) 2010, 2014, 2015, 2017 Ingo Schwarze <schwarze@openbsd.org>
1.1 schwarze 4: *
5: * Permission to use, copy, modify, and distribute this software for any
6: * purpose with or without fee is hereby granted, provided that the above
7: * copyright notice and this permission notice appear in all copies.
8: *
9: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12: * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13: * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14: * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15: * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16: */
17: #include <sys/types.h>
18:
19: #include <assert.h>
1.3 schwarze 20: #include <stddef.h>
1.1 schwarze 21:
22: #include "roff.h"
23: #include "out.h"
24: #include "term.h"
25:
26: #define ROFF_TERM_ARGS struct termp *p, const struct roff_node *n
27:
28: typedef void (*roff_term_pre_fp)(ROFF_TERM_ARGS);
29:
30: static void roff_term_pre_br(ROFF_TERM_ARGS);
1.2 schwarze 31: static void roff_term_pre_ft(ROFF_TERM_ARGS);
1.3 schwarze 32: static void roff_term_pre_ll(ROFF_TERM_ARGS);
1.4 schwarze 33: static void roff_term_pre_sp(ROFF_TERM_ARGS);
1.5 schwarze 34: static void roff_term_pre_ta(ROFF_TERM_ARGS);
1.6 ! schwarze 35: static void roff_term_pre_ti(ROFF_TERM_ARGS);
1.1 schwarze 36:
37: static const roff_term_pre_fp roff_term_pre_acts[ROFF_MAX] = {
38: roff_term_pre_br, /* br */
1.2 schwarze 39: roff_term_pre_ft, /* ft */
1.3 schwarze 40: roff_term_pre_ll, /* ft */
1.5 schwarze 41: roff_term_pre_sp, /* sp */
42: roff_term_pre_ta, /* ta */
1.6 ! schwarze 43: roff_term_pre_ti, /* ti */
1.1 schwarze 44: };
45:
46:
47: void
48: roff_term_pre(struct termp *p, const struct roff_node *n)
49: {
50: assert(n->tok < ROFF_MAX);
51: (*roff_term_pre_acts[n->tok])(p, n);
52: }
53:
54: static void
55: roff_term_pre_br(ROFF_TERM_ARGS)
56: {
57: term_newln(p);
58: if (p->flags & TERMP_BRIND) {
59: p->offset = p->rmargin;
60: p->rmargin = p->maxrmargin;
61: p->flags &= ~(TERMP_NOBREAK | TERMP_BRIND);
1.2 schwarze 62: }
63: }
64:
65: static void
66: roff_term_pre_ft(ROFF_TERM_ARGS)
67: {
68: switch (*n->child->string) {
69: case '4':
70: case '3':
71: case 'B':
72: term_fontrepl(p, TERMFONT_BOLD);
73: break;
74: case '2':
75: case 'I':
76: term_fontrepl(p, TERMFONT_UNDER);
77: break;
78: case 'P':
79: term_fontlast(p);
80: break;
81: case '1':
82: case 'C':
83: case 'R':
84: term_fontrepl(p, TERMFONT_NONE);
85: break;
86: default:
87: break;
1.1 schwarze 88: }
1.3 schwarze 89: }
90:
91: static void
92: roff_term_pre_ll(ROFF_TERM_ARGS)
93: {
94: term_setwidth(p, n->child != NULL ? n->child->string : NULL);
1.4 schwarze 95: }
96:
97: static void
98: roff_term_pre_sp(ROFF_TERM_ARGS)
99: {
100: struct roffsu su;
101: int len;
102:
103: if (n->child != NULL) {
104: if (a2roffsu(n->child->string, &su, SCALE_VS) == 0)
105: su.scale = 1.0;
106: len = term_vspan(p, &su);
107: } else
108: len = 1;
109:
110: if (len < 0)
111: p->skipvsp -= len;
112: else
113: while (len--)
114: term_vspace(p);
115:
116: roff_term_pre_br(p, n);
1.5 schwarze 117: }
118:
119: static void
120: roff_term_pre_ta(ROFF_TERM_ARGS)
121: {
122: term_tab_set(p, NULL);
123: for (n = n->child; n != NULL; n = n->next)
124: term_tab_set(p, n->string);
1.6 ! schwarze 125: }
! 126:
! 127: static void
! 128: roff_term_pre_ti(ROFF_TERM_ARGS)
! 129: {
! 130: struct roffsu su;
! 131: const char *cp;
! 132: int len, sign;
! 133:
! 134: roff_term_pre_br(p, n);
! 135:
! 136: if (n->child == NULL)
! 137: return;
! 138: cp = n->child->string;
! 139: if (*cp == '+') {
! 140: sign = 1;
! 141: cp++;
! 142: } else if (*cp == '-') {
! 143: sign = -1;
! 144: cp++;
! 145: } else
! 146: sign = 0;
! 147:
! 148: if (a2roffsu(cp, &su, SCALE_EM) == 0)
! 149: return;
! 150: len = term_hspan(p, &su) / 24;
! 151:
! 152: if (sign == 0) {
! 153: p->ti = len - p->offset;
! 154: p->offset = len;
! 155: } else if (sign == 1) {
! 156: p->ti = len;
! 157: p->offset += len;
! 158: } else if ((size_t)len < p->offset) {
! 159: p->ti = -len;
! 160: p->offset -= len;
! 161: } else {
! 162: p->ti = -p->offset;
! 163: p->offset = 0;
! 164: }
1.1 schwarze 165: }
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