Annotation of mandoc/roff_term.c, Revision 1.14
1.14 ! schwarze 1: /* $Id: roff_term.c,v 1.13 2017/06/14 22:51:25 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:
1.14 ! schwarze 22: #include "mandoc.h"
1.1 schwarze 23: #include "roff.h"
24: #include "out.h"
25: #include "term.h"
26:
27: #define ROFF_TERM_ARGS struct termp *p, const struct roff_node *n
28:
29: typedef void (*roff_term_pre_fp)(ROFF_TERM_ARGS);
30:
31: static void roff_term_pre_br(ROFF_TERM_ARGS);
1.8 schwarze 32: static void roff_term_pre_ce(ROFF_TERM_ARGS);
1.2 schwarze 33: static void roff_term_pre_ft(ROFF_TERM_ARGS);
1.3 schwarze 34: static void roff_term_pre_ll(ROFF_TERM_ARGS);
1.7 schwarze 35: static void roff_term_pre_mc(ROFF_TERM_ARGS);
1.13 schwarze 36: static void roff_term_pre_po(ROFF_TERM_ARGS);
1.4 schwarze 37: static void roff_term_pre_sp(ROFF_TERM_ARGS);
1.5 schwarze 38: static void roff_term_pre_ta(ROFF_TERM_ARGS);
1.6 schwarze 39: static void roff_term_pre_ti(ROFF_TERM_ARGS);
1.1 schwarze 40:
41: static const roff_term_pre_fp roff_term_pre_acts[ROFF_MAX] = {
42: roff_term_pre_br, /* br */
1.8 schwarze 43: roff_term_pre_ce, /* ce */
1.2 schwarze 44: roff_term_pre_ft, /* ft */
1.7 schwarze 45: roff_term_pre_ll, /* ll */
46: roff_term_pre_mc, /* mc */
1.13 schwarze 47: roff_term_pre_po, /* po */
1.11 schwarze 48: roff_term_pre_ce, /* rj */
1.5 schwarze 49: roff_term_pre_sp, /* sp */
50: roff_term_pre_ta, /* ta */
1.6 schwarze 51: roff_term_pre_ti, /* ti */
1.1 schwarze 52: };
53:
54:
55: void
56: roff_term_pre(struct termp *p, const struct roff_node *n)
57: {
58: assert(n->tok < ROFF_MAX);
59: (*roff_term_pre_acts[n->tok])(p, n);
60: }
61:
62: static void
63: roff_term_pre_br(ROFF_TERM_ARGS)
64: {
65: term_newln(p);
66: if (p->flags & TERMP_BRIND) {
1.9 schwarze 67: p->tcol->offset = p->tcol->rmargin;
68: p->tcol->rmargin = p->maxrmargin;
1.1 schwarze 69: p->flags &= ~(TERMP_NOBREAK | TERMP_BRIND);
1.2 schwarze 70: }
1.8 schwarze 71: }
72:
73: static void
74: roff_term_pre_ce(ROFF_TERM_ARGS)
75: {
1.11 schwarze 76: const struct roff_node *nc1, *nc2;
1.8 schwarze 77: size_t len, lm;
78:
79: roff_term_pre_br(p, n);
1.9 schwarze 80: lm = p->tcol->offset;
1.11 schwarze 81: nc1 = n->child->next;
82: while (nc1 != NULL) {
83: nc2 = nc1;
1.8 schwarze 84: len = 0;
85: do {
1.11 schwarze 86: if (nc2->type == ROFFT_TEXT) {
1.8 schwarze 87: if (len)
88: len++;
1.11 schwarze 89: len += term_strlen(p, nc2->string);
1.8 schwarze 90: }
1.11 schwarze 91: nc2 = nc2->next;
92: } while (nc2 != NULL && (nc2->type != ROFFT_TEXT ||
93: (nc2->flags & NODE_LINE) == 0));
1.9 schwarze 94: p->tcol->offset = len >= p->tcol->rmargin ? 0 :
95: lm + len >= p->tcol->rmargin ? p->tcol->rmargin - len :
1.11 schwarze 96: n->tok == ROFF_rj ? p->tcol->rmargin - len :
1.9 schwarze 97: (lm + p->tcol->rmargin - len) / 2;
1.11 schwarze 98: while (nc1 != nc2) {
99: if (nc1->type == ROFFT_TEXT)
100: term_word(p, nc1->string);
1.8 schwarze 101: else
1.11 schwarze 102: roff_term_pre(p, nc1);
103: nc1 = nc1->next;
1.8 schwarze 104: }
105: p->flags |= TERMP_NOSPACE;
106: term_flushln(p);
107: }
1.9 schwarze 108: p->tcol->offset = lm;
1.2 schwarze 109: }
110:
111: static void
112: roff_term_pre_ft(ROFF_TERM_ARGS)
113: {
114: switch (*n->child->string) {
115: case '4':
116: case '3':
117: case 'B':
118: term_fontrepl(p, TERMFONT_BOLD);
119: break;
120: case '2':
121: case 'I':
122: term_fontrepl(p, TERMFONT_UNDER);
123: break;
124: case 'P':
125: term_fontlast(p);
126: break;
127: case '1':
128: case 'C':
129: case 'R':
130: term_fontrepl(p, TERMFONT_NONE);
131: break;
132: default:
133: break;
1.1 schwarze 134: }
1.3 schwarze 135: }
136:
137: static void
138: roff_term_pre_ll(ROFF_TERM_ARGS)
139: {
140: term_setwidth(p, n->child != NULL ? n->child->string : NULL);
1.7 schwarze 141: }
142:
143: static void
144: roff_term_pre_mc(ROFF_TERM_ARGS)
145: {
146: if (p->col) {
147: p->flags |= TERMP_NOBREAK;
148: term_flushln(p);
149: p->flags &= ~(TERMP_NOBREAK | TERMP_NOSPACE);
150: }
151: if (n->child != NULL) {
152: p->mc = n->child->string;
153: p->flags |= TERMP_NEWMC;
154: } else
155: p->flags |= TERMP_ENDMC;
1.13 schwarze 156: }
157:
158: static void
159: roff_term_pre_po(ROFF_TERM_ARGS)
160: {
161: struct roffsu su;
162: static int po, polast;
163: int ponew;
164:
165: if (n->child != NULL &&
166: a2roffsu(n->child->string, &su, SCALE_EM) != NULL) {
167: ponew = term_hen(p, &su);
168: if (*n->child->string == '+' ||
169: *n->child->string == '-')
170: ponew += po;
171: } else
172: ponew = polast;
173: polast = po;
174: po = ponew;
175:
176: ponew = po - polast + (int)p->tcol->offset;
177: p->tcol->offset = ponew > 0 ? ponew : 0;
1.4 schwarze 178: }
179:
180: static void
181: roff_term_pre_sp(ROFF_TERM_ARGS)
182: {
183: struct roffsu su;
184: int len;
185:
186: if (n->child != NULL) {
1.10 schwarze 187: if (a2roffsu(n->child->string, &su, SCALE_VS) == NULL)
1.4 schwarze 188: su.scale = 1.0;
189: len = term_vspan(p, &su);
190: } else
191: len = 1;
192:
193: if (len < 0)
194: p->skipvsp -= len;
195: else
196: while (len--)
197: term_vspace(p);
198:
199: roff_term_pre_br(p, n);
1.5 schwarze 200: }
201:
202: static void
203: roff_term_pre_ta(ROFF_TERM_ARGS)
204: {
205: term_tab_set(p, NULL);
206: for (n = n->child; n != NULL; n = n->next)
207: term_tab_set(p, n->string);
1.6 schwarze 208: }
209:
210: static void
211: roff_term_pre_ti(ROFF_TERM_ARGS)
212: {
213: struct roffsu su;
214: const char *cp;
215: int len, sign;
216:
217: roff_term_pre_br(p, n);
218:
219: if (n->child == NULL)
220: return;
221: cp = n->child->string;
222: if (*cp == '+') {
223: sign = 1;
224: cp++;
225: } else if (*cp == '-') {
226: sign = -1;
227: cp++;
228: } else
229: sign = 0;
230:
1.10 schwarze 231: if (a2roffsu(cp, &su, SCALE_EM) == NULL)
1.6 schwarze 232: return;
1.12 schwarze 233: len = term_hen(p, &su);
1.6 schwarze 234:
235: if (sign == 0) {
1.9 schwarze 236: p->ti = len - p->tcol->offset;
237: p->tcol->offset = len;
1.6 schwarze 238: } else if (sign == 1) {
239: p->ti = len;
1.9 schwarze 240: p->tcol->offset += len;
241: } else if ((size_t)len < p->tcol->offset) {
1.6 schwarze 242: p->ti = -len;
1.9 schwarze 243: p->tcol->offset -= len;
1.6 schwarze 244: } else {
1.9 schwarze 245: p->ti = -p->tcol->offset;
246: p->tcol->offset = 0;
1.6 schwarze 247: }
1.1 schwarze 248: }
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