Annotation of mandoc/roff_term.c, Revision 1.16
1.16 ! schwarze 1: /* $Id: roff_term.c,v 1.15 2018/08/10 20:40:45 schwarze Exp $ */
1.1 schwarze 2: /*
1.15 schwarze 3: * Copyright (c) 2010,2014,2015,2017,2018 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>
1.1 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: {
1.15 schwarze 114: const char *cp;
115:
116: if (*(cp = n->child->string) == 'C')
117: cp++;
118:
119: switch (*cp) {
1.2 schwarze 120: case '4':
121: case '3':
122: case 'B':
123: term_fontrepl(p, TERMFONT_BOLD);
124: break;
125: case '2':
126: case 'I':
127: term_fontrepl(p, TERMFONT_UNDER);
128: break;
129: case 'P':
130: term_fontlast(p);
131: break;
132: case '1':
133: case 'C':
134: case 'R':
135: term_fontrepl(p, TERMFONT_NONE);
136: break;
137: default:
138: break;
1.1 schwarze 139: }
1.3 schwarze 140: }
141:
142: static void
143: roff_term_pre_ll(ROFF_TERM_ARGS)
144: {
145: term_setwidth(p, n->child != NULL ? n->child->string : NULL);
1.7 schwarze 146: }
147:
148: static void
149: roff_term_pre_mc(ROFF_TERM_ARGS)
150: {
151: if (p->col) {
152: p->flags |= TERMP_NOBREAK;
153: term_flushln(p);
154: p->flags &= ~(TERMP_NOBREAK | TERMP_NOSPACE);
155: }
156: if (n->child != NULL) {
157: p->mc = n->child->string;
158: p->flags |= TERMP_NEWMC;
159: } else
160: p->flags |= TERMP_ENDMC;
1.13 schwarze 161: }
162:
163: static void
164: roff_term_pre_po(ROFF_TERM_ARGS)
165: {
166: struct roffsu su;
167: static int po, polast;
168: int ponew;
169:
170: if (n->child != NULL &&
171: a2roffsu(n->child->string, &su, SCALE_EM) != NULL) {
172: ponew = term_hen(p, &su);
173: if (*n->child->string == '+' ||
174: *n->child->string == '-')
175: ponew += po;
176: } else
177: ponew = polast;
178: polast = po;
179: po = ponew;
180:
181: ponew = po - polast + (int)p->tcol->offset;
182: p->tcol->offset = ponew > 0 ? ponew : 0;
1.4 schwarze 183: }
184:
185: static void
186: roff_term_pre_sp(ROFF_TERM_ARGS)
187: {
188: struct roffsu su;
189: int len;
190:
191: if (n->child != NULL) {
1.10 schwarze 192: if (a2roffsu(n->child->string, &su, SCALE_VS) == NULL)
1.4 schwarze 193: su.scale = 1.0;
194: len = term_vspan(p, &su);
195: } else
196: len = 1;
197:
198: if (len < 0)
199: p->skipvsp -= len;
200: else
201: while (len--)
202: term_vspace(p);
203:
204: roff_term_pre_br(p, n);
1.5 schwarze 205: }
206:
207: static void
208: roff_term_pre_ta(ROFF_TERM_ARGS)
209: {
210: term_tab_set(p, NULL);
211: for (n = n->child; n != NULL; n = n->next)
212: term_tab_set(p, n->string);
1.6 schwarze 213: }
214:
215: static void
216: roff_term_pre_ti(ROFF_TERM_ARGS)
217: {
218: struct roffsu su;
219: const char *cp;
220: int len, sign;
221:
222: roff_term_pre_br(p, n);
223:
224: if (n->child == NULL)
225: return;
226: cp = n->child->string;
227: if (*cp == '+') {
228: sign = 1;
229: cp++;
230: } else if (*cp == '-') {
231: sign = -1;
232: cp++;
233: } else
234: sign = 0;
235:
1.10 schwarze 236: if (a2roffsu(cp, &su, SCALE_EM) == NULL)
1.6 schwarze 237: return;
1.12 schwarze 238: len = term_hen(p, &su);
1.6 schwarze 239:
240: if (sign == 0) {
1.9 schwarze 241: p->ti = len - p->tcol->offset;
242: p->tcol->offset = len;
1.6 schwarze 243: } else if (sign == 1) {
244: p->ti = len;
1.9 schwarze 245: p->tcol->offset += len;
246: } else if ((size_t)len < p->tcol->offset) {
1.6 schwarze 247: p->ti = -len;
1.9 schwarze 248: p->tcol->offset -= len;
1.6 schwarze 249: } else {
1.9 schwarze 250: p->ti = -p->tcol->offset;
251: p->tcol->offset = 0;
1.6 schwarze 252: }
1.1 schwarze 253: }
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