Annotation of mandoc/roff_term.c, Revision 1.10
1.10 ! schwarze 1: /* $Id: roff_term.c,v 1.9 2017/06/07 17:38:26 schwarze Exp $ */
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);
1.8 schwarze 31: static void roff_term_pre_ce(ROFF_TERM_ARGS);
1.2 schwarze 32: static void roff_term_pre_ft(ROFF_TERM_ARGS);
1.3 schwarze 33: static void roff_term_pre_ll(ROFF_TERM_ARGS);
1.7 schwarze 34: static void roff_term_pre_mc(ROFF_TERM_ARGS);
1.4 schwarze 35: static void roff_term_pre_sp(ROFF_TERM_ARGS);
1.5 schwarze 36: static void roff_term_pre_ta(ROFF_TERM_ARGS);
1.6 schwarze 37: static void roff_term_pre_ti(ROFF_TERM_ARGS);
1.1 schwarze 38:
39: static const roff_term_pre_fp roff_term_pre_acts[ROFF_MAX] = {
40: roff_term_pre_br, /* br */
1.8 schwarze 41: roff_term_pre_ce, /* ce */
1.2 schwarze 42: roff_term_pre_ft, /* ft */
1.7 schwarze 43: roff_term_pre_ll, /* ll */
44: roff_term_pre_mc, /* mc */
1.5 schwarze 45: roff_term_pre_sp, /* sp */
46: roff_term_pre_ta, /* ta */
1.6 schwarze 47: roff_term_pre_ti, /* ti */
1.1 schwarze 48: };
49:
50:
51: void
52: roff_term_pre(struct termp *p, const struct roff_node *n)
53: {
54: assert(n->tok < ROFF_MAX);
55: (*roff_term_pre_acts[n->tok])(p, n);
56: }
57:
58: static void
59: roff_term_pre_br(ROFF_TERM_ARGS)
60: {
61: term_newln(p);
62: if (p->flags & TERMP_BRIND) {
1.9 schwarze 63: p->tcol->offset = p->tcol->rmargin;
64: p->tcol->rmargin = p->maxrmargin;
1.1 schwarze 65: p->flags &= ~(TERMP_NOBREAK | TERMP_BRIND);
1.2 schwarze 66: }
1.8 schwarze 67: }
68:
69: static void
70: roff_term_pre_ce(ROFF_TERM_ARGS)
71: {
72: const struct roff_node *nch;
73: size_t len, lm;
74:
75: roff_term_pre_br(p, n);
1.9 schwarze 76: lm = p->tcol->offset;
1.8 schwarze 77: n = n->child->next;
78: while (n != NULL) {
79: nch = n;
80: len = 0;
81: do {
82: if (n->type == ROFFT_TEXT) {
83: if (len)
84: len++;
85: len += term_strlen(p, nch->string);
86: }
87: nch = nch->next;
88: } while (nch != NULL && (n->type != ROFFT_TEXT ||
89: (n->flags & NODE_LINE) == 0));
1.9 schwarze 90: p->tcol->offset = len >= p->tcol->rmargin ? 0 :
91: lm + len >= p->tcol->rmargin ? p->tcol->rmargin - len :
92: (lm + p->tcol->rmargin - len) / 2;
1.8 schwarze 93: while (n != nch) {
94: if (n->type == ROFFT_TEXT)
95: term_word(p, n->string);
96: else
97: roff_term_pre(p, n);
98: n = n->next;
99: }
100: p->flags |= TERMP_NOSPACE;
101: term_flushln(p);
102: }
1.9 schwarze 103: p->tcol->offset = lm;
1.2 schwarze 104: }
105:
106: static void
107: roff_term_pre_ft(ROFF_TERM_ARGS)
108: {
109: switch (*n->child->string) {
110: case '4':
111: case '3':
112: case 'B':
113: term_fontrepl(p, TERMFONT_BOLD);
114: break;
115: case '2':
116: case 'I':
117: term_fontrepl(p, TERMFONT_UNDER);
118: break;
119: case 'P':
120: term_fontlast(p);
121: break;
122: case '1':
123: case 'C':
124: case 'R':
125: term_fontrepl(p, TERMFONT_NONE);
126: break;
127: default:
128: break;
1.1 schwarze 129: }
1.3 schwarze 130: }
131:
132: static void
133: roff_term_pre_ll(ROFF_TERM_ARGS)
134: {
135: term_setwidth(p, n->child != NULL ? n->child->string : NULL);
1.7 schwarze 136: }
137:
138: static void
139: roff_term_pre_mc(ROFF_TERM_ARGS)
140: {
141: if (p->col) {
142: p->flags |= TERMP_NOBREAK;
143: term_flushln(p);
144: p->flags &= ~(TERMP_NOBREAK | TERMP_NOSPACE);
145: }
146: if (n->child != NULL) {
147: p->mc = n->child->string;
148: p->flags |= TERMP_NEWMC;
149: } else
150: p->flags |= TERMP_ENDMC;
1.4 schwarze 151: }
152:
153: static void
154: roff_term_pre_sp(ROFF_TERM_ARGS)
155: {
156: struct roffsu su;
157: int len;
158:
159: if (n->child != NULL) {
1.10 ! schwarze 160: if (a2roffsu(n->child->string, &su, SCALE_VS) == NULL)
1.4 schwarze 161: su.scale = 1.0;
162: len = term_vspan(p, &su);
163: } else
164: len = 1;
165:
166: if (len < 0)
167: p->skipvsp -= len;
168: else
169: while (len--)
170: term_vspace(p);
171:
172: roff_term_pre_br(p, n);
1.5 schwarze 173: }
174:
175: static void
176: roff_term_pre_ta(ROFF_TERM_ARGS)
177: {
178: term_tab_set(p, NULL);
179: for (n = n->child; n != NULL; n = n->next)
180: term_tab_set(p, n->string);
1.6 schwarze 181: }
182:
183: static void
184: roff_term_pre_ti(ROFF_TERM_ARGS)
185: {
186: struct roffsu su;
187: const char *cp;
188: int len, sign;
189:
190: roff_term_pre_br(p, n);
191:
192: if (n->child == NULL)
193: return;
194: cp = n->child->string;
195: if (*cp == '+') {
196: sign = 1;
197: cp++;
198: } else if (*cp == '-') {
199: sign = -1;
200: cp++;
201: } else
202: sign = 0;
203:
1.10 ! schwarze 204: if (a2roffsu(cp, &su, SCALE_EM) == NULL)
1.6 schwarze 205: return;
206: len = term_hspan(p, &su) / 24;
207:
208: if (sign == 0) {
1.9 schwarze 209: p->ti = len - p->tcol->offset;
210: p->tcol->offset = len;
1.6 schwarze 211: } else if (sign == 1) {
212: p->ti = len;
1.9 schwarze 213: p->tcol->offset += len;
214: } else if ((size_t)len < p->tcol->offset) {
1.6 schwarze 215: p->ti = -len;
1.9 schwarze 216: p->tcol->offset -= len;
1.6 schwarze 217: } else {
1.9 schwarze 218: p->ti = -p->tcol->offset;
219: p->tcol->offset = 0;
1.6 schwarze 220: }
1.1 schwarze 221: }
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