Annotation of mandoc/roff_term.c, Revision 1.7
1.7 ! schwarze 1: /* $Id$ */
1.1 schwarze 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);
1.7 ! schwarze 33: static void roff_term_pre_mc(ROFF_TERM_ARGS);
1.4 schwarze 34: static void roff_term_pre_sp(ROFF_TERM_ARGS);
1.5 schwarze 35: static void roff_term_pre_ta(ROFF_TERM_ARGS);
1.6 schwarze 36: static void roff_term_pre_ti(ROFF_TERM_ARGS);
1.1 schwarze 37:
38: static const roff_term_pre_fp roff_term_pre_acts[ROFF_MAX] = {
39: roff_term_pre_br, /* br */
1.2 schwarze 40: roff_term_pre_ft, /* ft */
1.7 ! schwarze 41: roff_term_pre_ll, /* ll */
! 42: roff_term_pre_mc, /* mc */
1.5 schwarze 43: roff_term_pre_sp, /* sp */
44: roff_term_pre_ta, /* ta */
1.6 schwarze 45: roff_term_pre_ti, /* ti */
1.1 schwarze 46: };
47:
48:
49: void
50: roff_term_pre(struct termp *p, const struct roff_node *n)
51: {
52: assert(n->tok < ROFF_MAX);
53: (*roff_term_pre_acts[n->tok])(p, n);
54: }
55:
56: static void
57: roff_term_pre_br(ROFF_TERM_ARGS)
58: {
59: term_newln(p);
60: if (p->flags & TERMP_BRIND) {
61: p->offset = p->rmargin;
62: p->rmargin = p->maxrmargin;
63: p->flags &= ~(TERMP_NOBREAK | TERMP_BRIND);
1.2 schwarze 64: }
65: }
66:
67: static void
68: roff_term_pre_ft(ROFF_TERM_ARGS)
69: {
70: switch (*n->child->string) {
71: case '4':
72: case '3':
73: case 'B':
74: term_fontrepl(p, TERMFONT_BOLD);
75: break;
76: case '2':
77: case 'I':
78: term_fontrepl(p, TERMFONT_UNDER);
79: break;
80: case 'P':
81: term_fontlast(p);
82: break;
83: case '1':
84: case 'C':
85: case 'R':
86: term_fontrepl(p, TERMFONT_NONE);
87: break;
88: default:
89: break;
1.1 schwarze 90: }
1.3 schwarze 91: }
92:
93: static void
94: roff_term_pre_ll(ROFF_TERM_ARGS)
95: {
96: term_setwidth(p, n->child != NULL ? n->child->string : NULL);
1.7 ! schwarze 97: }
! 98:
! 99: static void
! 100: roff_term_pre_mc(ROFF_TERM_ARGS)
! 101: {
! 102: if (p->col) {
! 103: p->flags |= TERMP_NOBREAK;
! 104: term_flushln(p);
! 105: p->flags &= ~(TERMP_NOBREAK | TERMP_NOSPACE);
! 106: }
! 107: if (n->child != NULL) {
! 108: p->mc = n->child->string;
! 109: p->flags |= TERMP_NEWMC;
! 110: } else
! 111: p->flags |= TERMP_ENDMC;
1.4 schwarze 112: }
113:
114: static void
115: roff_term_pre_sp(ROFF_TERM_ARGS)
116: {
117: struct roffsu su;
118: int len;
119:
120: if (n->child != NULL) {
121: if (a2roffsu(n->child->string, &su, SCALE_VS) == 0)
122: su.scale = 1.0;
123: len = term_vspan(p, &su);
124: } else
125: len = 1;
126:
127: if (len < 0)
128: p->skipvsp -= len;
129: else
130: while (len--)
131: term_vspace(p);
132:
133: roff_term_pre_br(p, n);
1.5 schwarze 134: }
135:
136: static void
137: roff_term_pre_ta(ROFF_TERM_ARGS)
138: {
139: term_tab_set(p, NULL);
140: for (n = n->child; n != NULL; n = n->next)
141: term_tab_set(p, n->string);
1.6 schwarze 142: }
143:
144: static void
145: roff_term_pre_ti(ROFF_TERM_ARGS)
146: {
147: struct roffsu su;
148: const char *cp;
149: int len, sign;
150:
151: roff_term_pre_br(p, n);
152:
153: if (n->child == NULL)
154: return;
155: cp = n->child->string;
156: if (*cp == '+') {
157: sign = 1;
158: cp++;
159: } else if (*cp == '-') {
160: sign = -1;
161: cp++;
162: } else
163: sign = 0;
164:
165: if (a2roffsu(cp, &su, SCALE_EM) == 0)
166: return;
167: len = term_hspan(p, &su) / 24;
168:
169: if (sign == 0) {
170: p->ti = len - p->offset;
171: p->offset = len;
172: } else if (sign == 1) {
173: p->ti = len;
174: p->offset += len;
175: } else if ((size_t)len < p->offset) {
176: p->ti = -len;
177: p->offset -= len;
178: } else {
179: p->ti = -p->offset;
180: p->offset = 0;
181: }
1.1 schwarze 182: }
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