Annotation of mandoc/roff_term.c, Revision 1.20
1.20 ! schwarze 1: /* $Id: roff_term.c,v 1.19 2019/01/04 03:24:33 schwarze Exp $ */
1.1 schwarze 2: /*
1.19 schwarze 3: * Copyright (c) 2010,2014,2015,2017-2019 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: */
1.20 ! schwarze 17: #include "config.h"
! 18:
1.1 schwarze 19: #include <sys/types.h>
20:
21: #include <assert.h>
1.16 schwarze 22: #include <stdio.h>
1.17 schwarze 23: #include <string.h>
1.1 schwarze 24:
1.14 schwarze 25: #include "mandoc.h"
1.1 schwarze 26: #include "roff.h"
27: #include "out.h"
28: #include "term.h"
29:
30: #define ROFF_TERM_ARGS struct termp *p, const struct roff_node *n
31:
32: typedef void (*roff_term_pre_fp)(ROFF_TERM_ARGS);
33:
34: static void roff_term_pre_br(ROFF_TERM_ARGS);
1.8 schwarze 35: static void roff_term_pre_ce(ROFF_TERM_ARGS);
1.2 schwarze 36: static void roff_term_pre_ft(ROFF_TERM_ARGS);
1.3 schwarze 37: static void roff_term_pre_ll(ROFF_TERM_ARGS);
1.7 schwarze 38: static void roff_term_pre_mc(ROFF_TERM_ARGS);
1.13 schwarze 39: static void roff_term_pre_po(ROFF_TERM_ARGS);
1.4 schwarze 40: static void roff_term_pre_sp(ROFF_TERM_ARGS);
1.5 schwarze 41: static void roff_term_pre_ta(ROFF_TERM_ARGS);
1.6 schwarze 42: static void roff_term_pre_ti(ROFF_TERM_ARGS);
1.1 schwarze 43:
44: static const roff_term_pre_fp roff_term_pre_acts[ROFF_MAX] = {
45: roff_term_pre_br, /* br */
1.8 schwarze 46: roff_term_pre_ce, /* ce */
1.18 schwarze 47: roff_term_pre_br, /* fi */
1.2 schwarze 48: roff_term_pre_ft, /* ft */
1.7 schwarze 49: roff_term_pre_ll, /* ll */
50: roff_term_pre_mc, /* mc */
1.18 schwarze 51: roff_term_pre_br, /* nf */
1.13 schwarze 52: roff_term_pre_po, /* po */
1.11 schwarze 53: roff_term_pre_ce, /* rj */
1.5 schwarze 54: roff_term_pre_sp, /* sp */
55: roff_term_pre_ta, /* ta */
1.6 schwarze 56: roff_term_pre_ti, /* ti */
1.1 schwarze 57: };
58:
59:
60: void
61: roff_term_pre(struct termp *p, const struct roff_node *n)
62: {
63: assert(n->tok < ROFF_MAX);
64: (*roff_term_pre_acts[n->tok])(p, n);
65: }
66:
67: static void
68: roff_term_pre_br(ROFF_TERM_ARGS)
69: {
70: term_newln(p);
71: if (p->flags & TERMP_BRIND) {
1.9 schwarze 72: p->tcol->offset = p->tcol->rmargin;
73: p->tcol->rmargin = p->maxrmargin;
1.18 schwarze 74: p->trailspace = 0;
1.1 schwarze 75: p->flags &= ~(TERMP_NOBREAK | TERMP_BRIND);
1.18 schwarze 76: p->flags |= TERMP_NOSPACE;
1.2 schwarze 77: }
1.8 schwarze 78: }
79:
80: static void
81: roff_term_pre_ce(ROFF_TERM_ARGS)
82: {
1.11 schwarze 83: const struct roff_node *nc1, *nc2;
1.8 schwarze 84:
85: roff_term_pre_br(p, n);
1.19 schwarze 86: p->flags |= n->tok == ROFF_ce ? TERMP_CENTER : TERMP_RIGHT;
1.11 schwarze 87: nc1 = n->child->next;
88: while (nc1 != NULL) {
89: nc2 = nc1;
1.8 schwarze 90: do {
1.11 schwarze 91: nc2 = nc2->next;
92: } while (nc2 != NULL && (nc2->type != ROFFT_TEXT ||
93: (nc2->flags & NODE_LINE) == 0));
94: while (nc1 != nc2) {
95: if (nc1->type == ROFFT_TEXT)
96: term_word(p, nc1->string);
1.8 schwarze 97: else
1.11 schwarze 98: roff_term_pre(p, nc1);
99: nc1 = nc1->next;
1.8 schwarze 100: }
101: p->flags |= TERMP_NOSPACE;
102: term_flushln(p);
103: }
1.19 schwarze 104: p->flags &= ~(TERMP_CENTER | TERMP_RIGHT);
1.2 schwarze 105: }
106:
107: static void
108: roff_term_pre_ft(ROFF_TERM_ARGS)
109: {
1.15 schwarze 110: const char *cp;
111:
1.17 schwarze 112: cp = n->child->string;
113: switch (mandoc_font(cp, (int)strlen(cp))) {
114: case ESCAPE_FONTBOLD:
1.2 schwarze 115: term_fontrepl(p, TERMFONT_BOLD);
116: break;
1.17 schwarze 117: case ESCAPE_FONTITALIC:
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:
127: case ESCAPE_FONTCW:
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;
160: static int po, polast;
161: int ponew;
162:
163: if (n->child != NULL &&
164: a2roffsu(n->child->string, &su, SCALE_EM) != NULL) {
165: ponew = term_hen(p, &su);
166: if (*n->child->string == '+' ||
167: *n->child->string == '-')
168: ponew += po;
169: } else
170: ponew = polast;
171: polast = po;
172: po = ponew;
173:
174: ponew = po - polast + (int)p->tcol->offset;
175: p->tcol->offset = ponew > 0 ? ponew : 0;
1.4 schwarze 176: }
177:
178: static void
179: roff_term_pre_sp(ROFF_TERM_ARGS)
180: {
181: struct roffsu su;
182: int len;
183:
184: if (n->child != NULL) {
1.10 schwarze 185: if (a2roffsu(n->child->string, &su, SCALE_VS) == NULL)
1.4 schwarze 186: su.scale = 1.0;
187: len = term_vspan(p, &su);
188: } else
189: len = 1;
190:
191: if (len < 0)
192: p->skipvsp -= len;
193: else
194: while (len--)
195: term_vspace(p);
196:
197: roff_term_pre_br(p, n);
1.5 schwarze 198: }
199:
200: static void
201: roff_term_pre_ta(ROFF_TERM_ARGS)
202: {
203: term_tab_set(p, NULL);
204: for (n = n->child; n != NULL; n = n->next)
205: term_tab_set(p, n->string);
1.6 schwarze 206: }
207:
208: static void
209: roff_term_pre_ti(ROFF_TERM_ARGS)
210: {
211: struct roffsu su;
212: const char *cp;
213: int len, sign;
214:
215: roff_term_pre_br(p, n);
216:
217: if (n->child == NULL)
218: return;
219: cp = n->child->string;
220: if (*cp == '+') {
221: sign = 1;
222: cp++;
223: } else if (*cp == '-') {
224: sign = -1;
225: cp++;
226: } else
227: sign = 0;
228:
1.10 schwarze 229: if (a2roffsu(cp, &su, SCALE_EM) == NULL)
1.6 schwarze 230: return;
1.12 schwarze 231: len = term_hen(p, &su);
1.6 schwarze 232:
233: if (sign == 0) {
1.9 schwarze 234: p->ti = len - p->tcol->offset;
235: p->tcol->offset = len;
1.6 schwarze 236: } else if (sign == 1) {
237: p->ti = len;
1.9 schwarze 238: p->tcol->offset += len;
239: } else if ((size_t)len < p->tcol->offset) {
1.6 schwarze 240: p->ti = -len;
1.9 schwarze 241: p->tcol->offset -= len;
1.6 schwarze 242: } else {
1.9 schwarze 243: p->ti = -p->tcol->offset;
244: p->tcol->offset = 0;
1.6 schwarze 245: }
1.1 schwarze 246: }
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