Annotation of src/usr.bin/mandoc/roff_term.c, Revision 1.23
1.23 ! jmc 1: /* $OpenBSD: roff_term.c,v 1.22 2021/08/10 12:36:42 schwarze Exp $ */
1.1 schwarze 2: /*
1.21 schwarze 3: * Copyright (c) 2010,2014,2015,2017-2020 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>
1.16 schwarze 20: #include <stdio.h>
1.17 schwarze 21: #include <string.h>
1.1 schwarze 22:
1.14 schwarze 23: #include "mandoc.h"
1.1 schwarze 24: #include "roff.h"
25: #include "out.h"
26: #include "term.h"
27:
28: #define ROFF_TERM_ARGS struct termp *p, const struct roff_node *n
29:
30: typedef void (*roff_term_pre_fp)(ROFF_TERM_ARGS);
31:
32: static void roff_term_pre_br(ROFF_TERM_ARGS);
1.8 schwarze 33: static void roff_term_pre_ce(ROFF_TERM_ARGS);
1.2 schwarze 34: static void roff_term_pre_ft(ROFF_TERM_ARGS);
1.3 schwarze 35: static void roff_term_pre_ll(ROFF_TERM_ARGS);
1.7 schwarze 36: static void roff_term_pre_mc(ROFF_TERM_ARGS);
1.13 schwarze 37: static void roff_term_pre_po(ROFF_TERM_ARGS);
1.4 schwarze 38: static void roff_term_pre_sp(ROFF_TERM_ARGS);
1.5 schwarze 39: static void roff_term_pre_ta(ROFF_TERM_ARGS);
1.6 schwarze 40: static void roff_term_pre_ti(ROFF_TERM_ARGS);
1.1 schwarze 41:
42: static const roff_term_pre_fp roff_term_pre_acts[ROFF_MAX] = {
43: roff_term_pre_br, /* br */
1.8 schwarze 44: roff_term_pre_ce, /* ce */
1.18 schwarze 45: roff_term_pre_br, /* fi */
1.2 schwarze 46: roff_term_pre_ft, /* ft */
1.7 schwarze 47: roff_term_pre_ll, /* ll */
48: roff_term_pre_mc, /* mc */
1.18 schwarze 49: roff_term_pre_br, /* nf */
1.13 schwarze 50: roff_term_pre_po, /* po */
1.11 schwarze 51: roff_term_pre_ce, /* rj */
1.5 schwarze 52: roff_term_pre_sp, /* sp */
53: roff_term_pre_ta, /* ta */
1.6 schwarze 54: roff_term_pre_ti, /* ti */
1.1 schwarze 55: };
56:
57:
58: void
59: roff_term_pre(struct termp *p, const struct roff_node *n)
60: {
61: assert(n->tok < ROFF_MAX);
62: (*roff_term_pre_acts[n->tok])(p, n);
63: }
64:
65: static void
66: roff_term_pre_br(ROFF_TERM_ARGS)
67: {
68: term_newln(p);
69: if (p->flags & TERMP_BRIND) {
1.9 schwarze 70: p->tcol->offset = p->tcol->rmargin;
71: p->tcol->rmargin = p->maxrmargin;
1.18 schwarze 72: p->trailspace = 0;
1.1 schwarze 73: p->flags &= ~(TERMP_NOBREAK | TERMP_BRIND);
1.18 schwarze 74: p->flags |= TERMP_NOSPACE;
1.2 schwarze 75: }
1.8 schwarze 76: }
77:
78: static void
79: roff_term_pre_ce(ROFF_TERM_ARGS)
80: {
1.11 schwarze 81: const struct roff_node *nc1, *nc2;
1.8 schwarze 82:
83: roff_term_pre_br(p, n);
1.19 schwarze 84: p->flags |= n->tok == ROFF_ce ? TERMP_CENTER : TERMP_RIGHT;
1.11 schwarze 85: nc1 = n->child->next;
86: while (nc1 != NULL) {
87: nc2 = nc1;
1.8 schwarze 88: do {
1.11 schwarze 89: nc2 = nc2->next;
90: } while (nc2 != NULL && (nc2->type != ROFFT_TEXT ||
91: (nc2->flags & NODE_LINE) == 0));
92: while (nc1 != nc2) {
93: if (nc1->type == ROFFT_TEXT)
94: term_word(p, nc1->string);
1.8 schwarze 95: else
1.11 schwarze 96: roff_term_pre(p, nc1);
97: nc1 = nc1->next;
1.8 schwarze 98: }
99: p->flags |= TERMP_NOSPACE;
100: term_flushln(p);
101: }
1.19 schwarze 102: p->flags &= ~(TERMP_CENTER | TERMP_RIGHT);
1.2 schwarze 103: }
104:
105: static void
106: roff_term_pre_ft(ROFF_TERM_ARGS)
107: {
1.15 schwarze 108: const char *cp;
109:
1.17 schwarze 110: cp = n->child->string;
111: switch (mandoc_font(cp, (int)strlen(cp))) {
112: case ESCAPE_FONTBOLD:
1.22 schwarze 113: case ESCAPE_FONTCB:
1.2 schwarze 114: term_fontrepl(p, TERMFONT_BOLD);
115: break;
1.17 schwarze 116: case ESCAPE_FONTITALIC:
1.22 schwarze 117: case ESCAPE_FONTCI:
1.2 schwarze 118: term_fontrepl(p, TERMFONT_UNDER);
119: break;
1.17 schwarze 120: case ESCAPE_FONTBI:
121: term_fontrepl(p, TERMFONT_BI);
122: break;
123: case ESCAPE_FONTPREV:
1.2 schwarze 124: term_fontlast(p);
125: break;
1.17 schwarze 126: case ESCAPE_FONTROMAN:
1.22 schwarze 127: case ESCAPE_FONTCR:
1.2 schwarze 128: term_fontrepl(p, TERMFONT_NONE);
129: break;
130: default:
131: break;
1.1 schwarze 132: }
1.3 schwarze 133: }
134:
135: static void
136: roff_term_pre_ll(ROFF_TERM_ARGS)
137: {
138: term_setwidth(p, n->child != NULL ? n->child->string : NULL);
1.7 schwarze 139: }
140:
141: static void
142: roff_term_pre_mc(ROFF_TERM_ARGS)
143: {
144: if (p->col) {
145: p->flags |= TERMP_NOBREAK;
146: term_flushln(p);
147: p->flags &= ~(TERMP_NOBREAK | TERMP_NOSPACE);
148: }
149: if (n->child != NULL) {
150: p->mc = n->child->string;
151: p->flags |= TERMP_NEWMC;
152: } else
153: p->flags |= TERMP_ENDMC;
1.13 schwarze 154: }
155:
156: static void
157: roff_term_pre_po(ROFF_TERM_ARGS)
158: {
159: struct roffsu su;
1.21 schwarze 160: static int po, pouse, polast;
1.13 schwarze 161: int ponew;
162:
1.21 schwarze 163: /* Revert the currently active page offset. */
164: p->tcol->offset -= pouse;
165:
166: /* Determine the requested page offset. */
1.13 schwarze 167: if (n->child != NULL &&
168: a2roffsu(n->child->string, &su, SCALE_EM) != NULL) {
169: ponew = term_hen(p, &su);
170: if (*n->child->string == '+' ||
171: *n->child->string == '-')
172: ponew += po;
173: } else
174: ponew = polast;
1.21 schwarze 175:
1.23 ! jmc 176: /* Remember both the previous and the newly requested offset. */
1.13 schwarze 177: polast = po;
178: po = ponew;
179:
1.21 schwarze 180: /* Truncate to the range [-offset, 60], remember, and apply it. */
181: pouse = po >= 60 ? 60 :
182: po < -(int)p->tcol->offset ? -p->tcol->offset : po;
183: p->tcol->offset += pouse;
1.4 schwarze 184: }
185:
186: static void
187: roff_term_pre_sp(ROFF_TERM_ARGS)
188: {
189: struct roffsu su;
190: int len;
191:
192: if (n->child != NULL) {
1.10 schwarze 193: if (a2roffsu(n->child->string, &su, SCALE_VS) == NULL)
1.4 schwarze 194: su.scale = 1.0;
195: len = term_vspan(p, &su);
196: } else
197: len = 1;
198:
199: if (len < 0)
200: p->skipvsp -= len;
201: else
202: while (len--)
203: term_vspace(p);
204:
205: roff_term_pre_br(p, n);
1.5 schwarze 206: }
207:
208: static void
209: roff_term_pre_ta(ROFF_TERM_ARGS)
210: {
211: term_tab_set(p, NULL);
212: for (n = n->child; n != NULL; n = n->next)
213: term_tab_set(p, n->string);
1.6 schwarze 214: }
215:
216: static void
217: roff_term_pre_ti(ROFF_TERM_ARGS)
218: {
219: struct roffsu su;
220: const char *cp;
1.20 schwarze 221: const size_t maxoff = 72;
1.6 schwarze 222: int len, sign;
223:
224: roff_term_pre_br(p, n);
225:
226: if (n->child == NULL)
227: return;
228: cp = n->child->string;
229: if (*cp == '+') {
230: sign = 1;
231: cp++;
232: } else if (*cp == '-') {
233: sign = -1;
234: cp++;
235: } else
236: sign = 0;
237:
1.10 schwarze 238: if (a2roffsu(cp, &su, SCALE_EM) == NULL)
1.6 schwarze 239: return;
1.12 schwarze 240: len = term_hen(p, &su);
1.6 schwarze 241:
1.20 schwarze 242: switch (sign) {
243: case 1:
244: if (p->tcol->offset + len <= maxoff)
245: p->ti = len;
246: else if (p->tcol->offset < maxoff)
247: p->ti = maxoff - p->tcol->offset;
248: else
249: p->ti = 0;
250: break;
251: case -1:
252: if ((size_t)len < p->tcol->offset)
253: p->ti = -len;
254: else
255: p->ti = -p->tcol->offset;
256: break;
257: default:
258: if ((size_t)len > maxoff)
259: len = maxoff;
1.9 schwarze 260: p->ti = len - p->tcol->offset;
1.20 schwarze 261: break;
1.6 schwarze 262: }
1.20 schwarze 263: p->tcol->offset += p->ti;
1.1 schwarze 264: }
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