Annotation of mandoc/roff_term.c, Revision 1.13
1.13 ! schwarze 1: /* $Id: roff_term.c,v 1.12 2017/06/14 17:51:15 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);
1.13 ! schwarze 35: static void roff_term_pre_po(ROFF_TERM_ARGS);
1.4 schwarze 36: static void roff_term_pre_sp(ROFF_TERM_ARGS);
1.5 schwarze 37: static void roff_term_pre_ta(ROFF_TERM_ARGS);
1.6 schwarze 38: static void roff_term_pre_ti(ROFF_TERM_ARGS);
1.1 schwarze 39:
40: static const roff_term_pre_fp roff_term_pre_acts[ROFF_MAX] = {
41: roff_term_pre_br, /* br */
1.8 schwarze 42: roff_term_pre_ce, /* ce */
1.2 schwarze 43: roff_term_pre_ft, /* ft */
1.7 schwarze 44: roff_term_pre_ll, /* ll */
45: roff_term_pre_mc, /* mc */
1.13 ! schwarze 46: roff_term_pre_po, /* po */
1.11 schwarze 47: roff_term_pre_ce, /* rj */
1.5 schwarze 48: roff_term_pre_sp, /* sp */
49: roff_term_pre_ta, /* ta */
1.6 schwarze 50: roff_term_pre_ti, /* ti */
1.1 schwarze 51: };
52:
53:
54: void
55: roff_term_pre(struct termp *p, const struct roff_node *n)
56: {
57: assert(n->tok < ROFF_MAX);
58: (*roff_term_pre_acts[n->tok])(p, n);
59: }
60:
61: static void
62: roff_term_pre_br(ROFF_TERM_ARGS)
63: {
64: term_newln(p);
65: if (p->flags & TERMP_BRIND) {
1.9 schwarze 66: p->tcol->offset = p->tcol->rmargin;
67: p->tcol->rmargin = p->maxrmargin;
1.1 schwarze 68: p->flags &= ~(TERMP_NOBREAK | TERMP_BRIND);
1.2 schwarze 69: }
1.8 schwarze 70: }
71:
72: static void
73: roff_term_pre_ce(ROFF_TERM_ARGS)
74: {
1.11 schwarze 75: const struct roff_node *nc1, *nc2;
1.8 schwarze 76: size_t len, lm;
77:
78: roff_term_pre_br(p, n);
1.9 schwarze 79: lm = p->tcol->offset;
1.11 schwarze 80: nc1 = n->child->next;
81: while (nc1 != NULL) {
82: nc2 = nc1;
1.8 schwarze 83: len = 0;
84: do {
1.11 schwarze 85: if (nc2->type == ROFFT_TEXT) {
1.8 schwarze 86: if (len)
87: len++;
1.11 schwarze 88: len += term_strlen(p, nc2->string);
1.8 schwarze 89: }
1.11 schwarze 90: nc2 = nc2->next;
91: } while (nc2 != NULL && (nc2->type != ROFFT_TEXT ||
92: (nc2->flags & NODE_LINE) == 0));
1.9 schwarze 93: p->tcol->offset = len >= p->tcol->rmargin ? 0 :
94: lm + len >= p->tcol->rmargin ? p->tcol->rmargin - len :
1.11 schwarze 95: n->tok == ROFF_rj ? p->tcol->rmargin - len :
1.9 schwarze 96: (lm + p->tcol->rmargin - len) / 2;
1.11 schwarze 97: while (nc1 != nc2) {
98: if (nc1->type == ROFFT_TEXT)
99: term_word(p, nc1->string);
1.8 schwarze 100: else
1.11 schwarze 101: roff_term_pre(p, nc1);
102: nc1 = nc1->next;
1.8 schwarze 103: }
104: p->flags |= TERMP_NOSPACE;
105: term_flushln(p);
106: }
1.9 schwarze 107: p->tcol->offset = lm;
1.2 schwarze 108: }
109:
110: static void
111: roff_term_pre_ft(ROFF_TERM_ARGS)
112: {
113: switch (*n->child->string) {
114: case '4':
115: case '3':
116: case 'B':
117: term_fontrepl(p, TERMFONT_BOLD);
118: break;
119: case '2':
120: case 'I':
121: term_fontrepl(p, TERMFONT_UNDER);
122: break;
123: case 'P':
124: term_fontlast(p);
125: break;
126: case '1':
127: case 'C':
128: case 'R':
129: term_fontrepl(p, TERMFONT_NONE);
130: break;
131: default:
132: break;
1.1 schwarze 133: }
1.3 schwarze 134: }
135:
136: static void
137: roff_term_pre_ll(ROFF_TERM_ARGS)
138: {
139: term_setwidth(p, n->child != NULL ? n->child->string : NULL);
1.7 schwarze 140: }
141:
142: static void
143: roff_term_pre_mc(ROFF_TERM_ARGS)
144: {
145: if (p->col) {
146: p->flags |= TERMP_NOBREAK;
147: term_flushln(p);
148: p->flags &= ~(TERMP_NOBREAK | TERMP_NOSPACE);
149: }
150: if (n->child != NULL) {
151: p->mc = n->child->string;
152: p->flags |= TERMP_NEWMC;
153: } else
154: p->flags |= TERMP_ENDMC;
1.13 ! schwarze 155: }
! 156:
! 157: static void
! 158: roff_term_pre_po(ROFF_TERM_ARGS)
! 159: {
! 160: struct roffsu su;
! 161: static int po, polast;
! 162: int ponew;
! 163:
! 164: if (n->child != NULL &&
! 165: a2roffsu(n->child->string, &su, SCALE_EM) != NULL) {
! 166: ponew = term_hen(p, &su);
! 167: if (*n->child->string == '+' ||
! 168: *n->child->string == '-')
! 169: ponew += po;
! 170: } else
! 171: ponew = polast;
! 172: polast = po;
! 173: po = ponew;
! 174:
! 175: ponew = po - polast + (int)p->tcol->offset;
! 176: p->tcol->offset = ponew > 0 ? ponew : 0;
1.4 schwarze 177: }
178:
179: static void
180: roff_term_pre_sp(ROFF_TERM_ARGS)
181: {
182: struct roffsu su;
183: int len;
184:
185: if (n->child != NULL) {
1.10 schwarze 186: if (a2roffsu(n->child->string, &su, SCALE_VS) == NULL)
1.4 schwarze 187: su.scale = 1.0;
188: len = term_vspan(p, &su);
189: } else
190: len = 1;
191:
192: if (len < 0)
193: p->skipvsp -= len;
194: else
195: while (len--)
196: term_vspace(p);
197:
198: roff_term_pre_br(p, n);
1.5 schwarze 199: }
200:
201: static void
202: roff_term_pre_ta(ROFF_TERM_ARGS)
203: {
204: term_tab_set(p, NULL);
205: for (n = n->child; n != NULL; n = n->next)
206: term_tab_set(p, n->string);
1.6 schwarze 207: }
208:
209: static void
210: roff_term_pre_ti(ROFF_TERM_ARGS)
211: {
212: struct roffsu su;
213: const char *cp;
214: int len, sign;
215:
216: roff_term_pre_br(p, n);
217:
218: if (n->child == NULL)
219: return;
220: cp = n->child->string;
221: if (*cp == '+') {
222: sign = 1;
223: cp++;
224: } else if (*cp == '-') {
225: sign = -1;
226: cp++;
227: } else
228: sign = 0;
229:
1.10 schwarze 230: if (a2roffsu(cp, &su, SCALE_EM) == NULL)
1.6 schwarze 231: return;
1.12 schwarze 232: len = term_hen(p, &su);
1.6 schwarze 233:
234: if (sign == 0) {
1.9 schwarze 235: p->ti = len - p->tcol->offset;
236: p->tcol->offset = len;
1.6 schwarze 237: } else if (sign == 1) {
238: p->ti = len;
1.9 schwarze 239: p->tcol->offset += len;
240: } else if ((size_t)len < p->tcol->offset) {
1.6 schwarze 241: p->ti = -len;
1.9 schwarze 242: p->tcol->offset -= len;
1.6 schwarze 243: } else {
1.9 schwarze 244: p->ti = -p->tcol->offset;
245: p->tcol->offset = 0;
1.6 schwarze 246: }
1.1 schwarze 247: }
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