Annotation of mandoc/roff_term.c, Revision 1.19
1.19 ! schwarze 1: /* $Id: roff_term.c,v 1.18 2018/12/31 07:08:12 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: */
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:
1.2 schwarze 113: term_fontrepl(p, TERMFONT_BOLD);
114: break;
1.17 schwarze 115: case ESCAPE_FONTITALIC:
1.2 schwarze 116: term_fontrepl(p, TERMFONT_UNDER);
117: break;
1.17 schwarze 118: case ESCAPE_FONTBI:
119: term_fontrepl(p, TERMFONT_BI);
120: break;
121: case ESCAPE_FONTPREV:
1.2 schwarze 122: term_fontlast(p);
123: break;
1.17 schwarze 124: case ESCAPE_FONTROMAN:
125: case ESCAPE_FONTCW:
1.2 schwarze 126: term_fontrepl(p, TERMFONT_NONE);
127: break;
128: default:
129: break;
1.1 schwarze 130: }
1.3 schwarze 131: }
132:
133: static void
134: roff_term_pre_ll(ROFF_TERM_ARGS)
135: {
136: term_setwidth(p, n->child != NULL ? n->child->string : NULL);
1.7 schwarze 137: }
138:
139: static void
140: roff_term_pre_mc(ROFF_TERM_ARGS)
141: {
142: if (p->col) {
143: p->flags |= TERMP_NOBREAK;
144: term_flushln(p);
145: p->flags &= ~(TERMP_NOBREAK | TERMP_NOSPACE);
146: }
147: if (n->child != NULL) {
148: p->mc = n->child->string;
149: p->flags |= TERMP_NEWMC;
150: } else
151: p->flags |= TERMP_ENDMC;
1.13 schwarze 152: }
153:
154: static void
155: roff_term_pre_po(ROFF_TERM_ARGS)
156: {
157: struct roffsu su;
158: static int po, polast;
159: int ponew;
160:
161: if (n->child != NULL &&
162: a2roffsu(n->child->string, &su, SCALE_EM) != NULL) {
163: ponew = term_hen(p, &su);
164: if (*n->child->string == '+' ||
165: *n->child->string == '-')
166: ponew += po;
167: } else
168: ponew = polast;
169: polast = po;
170: po = ponew;
171:
172: ponew = po - polast + (int)p->tcol->offset;
173: p->tcol->offset = ponew > 0 ? ponew : 0;
1.4 schwarze 174: }
175:
176: static void
177: roff_term_pre_sp(ROFF_TERM_ARGS)
178: {
179: struct roffsu su;
180: int len;
181:
182: if (n->child != NULL) {
1.10 schwarze 183: if (a2roffsu(n->child->string, &su, SCALE_VS) == NULL)
1.4 schwarze 184: su.scale = 1.0;
185: len = term_vspan(p, &su);
186: } else
187: len = 1;
188:
189: if (len < 0)
190: p->skipvsp -= len;
191: else
192: while (len--)
193: term_vspace(p);
194:
195: roff_term_pre_br(p, n);
1.5 schwarze 196: }
197:
198: static void
199: roff_term_pre_ta(ROFF_TERM_ARGS)
200: {
201: term_tab_set(p, NULL);
202: for (n = n->child; n != NULL; n = n->next)
203: term_tab_set(p, n->string);
1.6 schwarze 204: }
205:
206: static void
207: roff_term_pre_ti(ROFF_TERM_ARGS)
208: {
209: struct roffsu su;
210: const char *cp;
211: int len, sign;
212:
213: roff_term_pre_br(p, n);
214:
215: if (n->child == NULL)
216: return;
217: cp = n->child->string;
218: if (*cp == '+') {
219: sign = 1;
220: cp++;
221: } else if (*cp == '-') {
222: sign = -1;
223: cp++;
224: } else
225: sign = 0;
226:
1.10 schwarze 227: if (a2roffsu(cp, &su, SCALE_EM) == NULL)
1.6 schwarze 228: return;
1.12 schwarze 229: len = term_hen(p, &su);
1.6 schwarze 230:
231: if (sign == 0) {
1.9 schwarze 232: p->ti = len - p->tcol->offset;
233: p->tcol->offset = len;
1.6 schwarze 234: } else if (sign == 1) {
235: p->ti = len;
1.9 schwarze 236: p->tcol->offset += len;
237: } else if ((size_t)len < p->tcol->offset) {
1.6 schwarze 238: p->ti = -len;
1.9 schwarze 239: p->tcol->offset -= len;
1.6 schwarze 240: } else {
1.9 schwarze 241: p->ti = -p->tcol->offset;
242: p->tcol->offset = 0;
1.6 schwarze 243: }
1.1 schwarze 244: }
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