Annotation of mandoc/roff_term.c, Revision 1.11
1.11 ! schwarze 1: /* $Id: roff_term.c,v 1.10 2017/06/08 12:54:58 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 */
1.11 ! schwarze 45: roff_term_pre_ce, /* rj */
1.5 schwarze 46: roff_term_pre_sp, /* sp */
47: roff_term_pre_ta, /* ta */
1.6 schwarze 48: roff_term_pre_ti, /* ti */
1.1 schwarze 49: };
50:
51:
52: void
53: roff_term_pre(struct termp *p, const struct roff_node *n)
54: {
55: assert(n->tok < ROFF_MAX);
56: (*roff_term_pre_acts[n->tok])(p, n);
57: }
58:
59: static void
60: roff_term_pre_br(ROFF_TERM_ARGS)
61: {
62: term_newln(p);
63: if (p->flags & TERMP_BRIND) {
1.9 schwarze 64: p->tcol->offset = p->tcol->rmargin;
65: p->tcol->rmargin = p->maxrmargin;
1.1 schwarze 66: p->flags &= ~(TERMP_NOBREAK | TERMP_BRIND);
1.2 schwarze 67: }
1.8 schwarze 68: }
69:
70: static void
71: roff_term_pre_ce(ROFF_TERM_ARGS)
72: {
1.11 ! schwarze 73: const struct roff_node *nc1, *nc2;
1.8 schwarze 74: size_t len, lm;
75:
76: roff_term_pre_br(p, n);
1.9 schwarze 77: lm = p->tcol->offset;
1.11 ! schwarze 78: nc1 = n->child->next;
! 79: while (nc1 != NULL) {
! 80: nc2 = nc1;
1.8 schwarze 81: len = 0;
82: do {
1.11 ! schwarze 83: if (nc2->type == ROFFT_TEXT) {
1.8 schwarze 84: if (len)
85: len++;
1.11 ! schwarze 86: len += term_strlen(p, nc2->string);
1.8 schwarze 87: }
1.11 ! schwarze 88: nc2 = nc2->next;
! 89: } while (nc2 != NULL && (nc2->type != ROFFT_TEXT ||
! 90: (nc2->flags & NODE_LINE) == 0));
1.9 schwarze 91: p->tcol->offset = len >= p->tcol->rmargin ? 0 :
92: lm + len >= p->tcol->rmargin ? p->tcol->rmargin - len :
1.11 ! schwarze 93: n->tok == ROFF_rj ? p->tcol->rmargin - len :
1.9 schwarze 94: (lm + p->tcol->rmargin - len) / 2;
1.11 ! schwarze 95: while (nc1 != nc2) {
! 96: if (nc1->type == ROFFT_TEXT)
! 97: term_word(p, nc1->string);
1.8 schwarze 98: else
1.11 ! schwarze 99: roff_term_pre(p, nc1);
! 100: nc1 = nc1->next;
1.8 schwarze 101: }
102: p->flags |= TERMP_NOSPACE;
103: term_flushln(p);
104: }
1.9 schwarze 105: p->tcol->offset = lm;
1.2 schwarze 106: }
107:
108: static void
109: roff_term_pre_ft(ROFF_TERM_ARGS)
110: {
111: switch (*n->child->string) {
112: case '4':
113: case '3':
114: case 'B':
115: term_fontrepl(p, TERMFONT_BOLD);
116: break;
117: case '2':
118: case 'I':
119: term_fontrepl(p, TERMFONT_UNDER);
120: break;
121: case 'P':
122: term_fontlast(p);
123: break;
124: case '1':
125: case 'C':
126: case 'R':
127: term_fontrepl(p, TERMFONT_NONE);
128: break;
129: default:
130: break;
1.1 schwarze 131: }
1.3 schwarze 132: }
133:
134: static void
135: roff_term_pre_ll(ROFF_TERM_ARGS)
136: {
137: term_setwidth(p, n->child != NULL ? n->child->string : NULL);
1.7 schwarze 138: }
139:
140: static void
141: roff_term_pre_mc(ROFF_TERM_ARGS)
142: {
143: if (p->col) {
144: p->flags |= TERMP_NOBREAK;
145: term_flushln(p);
146: p->flags &= ~(TERMP_NOBREAK | TERMP_NOSPACE);
147: }
148: if (n->child != NULL) {
149: p->mc = n->child->string;
150: p->flags |= TERMP_NEWMC;
151: } else
152: p->flags |= TERMP_ENDMC;
1.4 schwarze 153: }
154:
155: static void
156: roff_term_pre_sp(ROFF_TERM_ARGS)
157: {
158: struct roffsu su;
159: int len;
160:
161: if (n->child != NULL) {
1.10 schwarze 162: if (a2roffsu(n->child->string, &su, SCALE_VS) == NULL)
1.4 schwarze 163: su.scale = 1.0;
164: len = term_vspan(p, &su);
165: } else
166: len = 1;
167:
168: if (len < 0)
169: p->skipvsp -= len;
170: else
171: while (len--)
172: term_vspace(p);
173:
174: roff_term_pre_br(p, n);
1.5 schwarze 175: }
176:
177: static void
178: roff_term_pre_ta(ROFF_TERM_ARGS)
179: {
180: term_tab_set(p, NULL);
181: for (n = n->child; n != NULL; n = n->next)
182: term_tab_set(p, n->string);
1.6 schwarze 183: }
184:
185: static void
186: roff_term_pre_ti(ROFF_TERM_ARGS)
187: {
188: struct roffsu su;
189: const char *cp;
190: int len, sign;
191:
192: roff_term_pre_br(p, n);
193:
194: if (n->child == NULL)
195: return;
196: cp = n->child->string;
197: if (*cp == '+') {
198: sign = 1;
199: cp++;
200: } else if (*cp == '-') {
201: sign = -1;
202: cp++;
203: } else
204: sign = 0;
205:
1.10 schwarze 206: if (a2roffsu(cp, &su, SCALE_EM) == NULL)
1.6 schwarze 207: return;
208: len = term_hspan(p, &su) / 24;
209:
210: if (sign == 0) {
1.9 schwarze 211: p->ti = len - p->tcol->offset;
212: p->tcol->offset = len;
1.6 schwarze 213: } else if (sign == 1) {
214: p->ti = len;
1.9 schwarze 215: p->tcol->offset += len;
216: } else if ((size_t)len < p->tcol->offset) {
1.6 schwarze 217: p->ti = -len;
1.9 schwarze 218: p->tcol->offset -= len;
1.6 schwarze 219: } else {
1.9 schwarze 220: p->ti = -p->tcol->offset;
221: p->tcol->offset = 0;
1.6 schwarze 222: }
1.1 schwarze 223: }
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