Annotation of mandoc/tbl_layout.c, Revision 1.30
1.30 ! schwarze 1: /* $Id: tbl_layout.c,v 1.29 2014/10/14 02:16:06 schwarze Exp $ */
1.1 kristaps 2: /*
1.22 schwarze 3: * Copyright (c) 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
1.25 schwarze 4: * Copyright (c) 2012, 2014 Ingo Schwarze <schwarze@openbsd.org>
1.1 kristaps 5: *
6: * Permission to use, copy, modify, and distribute this software for any
7: * purpose with or without fee is hereby granted, provided that the above
8: * copyright notice and this permission notice appear in all copies.
9: *
10: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13: * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14: * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15: * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16: * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17: */
1.18 kristaps 18: #include "config.h"
1.27 schwarze 19:
20: #include <sys/types.h>
1.18 kristaps 21:
1.1 kristaps 22: #include <ctype.h>
23: #include <stdlib.h>
24: #include <string.h>
1.4 kristaps 25: #include <time.h>
1.1 kristaps 26:
27: #include "mandoc.h"
1.24 schwarze 28: #include "mandoc_aux.h"
1.1 kristaps 29: #include "libmandoc.h"
30: #include "libroff.h"
31:
32: struct tbl_phrase {
33: char name;
34: enum tbl_cellt key;
35: };
36:
1.11 kristaps 37: /*
38: * FIXME: we can make this parse a lot nicer by, when an error is
39: * encountered in a layout key, bailing to the next key (i.e. to the
40: * next whitespace then continuing).
41: */
42:
1.2 kristaps 43: #define KEYS_MAX 11
1.1 kristaps 44:
45: static const struct tbl_phrase keys[KEYS_MAX] = {
46: { 'c', TBL_CELL_CENTRE },
47: { 'r', TBL_CELL_RIGHT },
48: { 'l', TBL_CELL_LEFT },
49: { 'n', TBL_CELL_NUMBER },
50: { 's', TBL_CELL_SPAN },
51: { 'a', TBL_CELL_LONG },
52: { '^', TBL_CELL_DOWN },
53: { '-', TBL_CELL_HORIZ },
54: { '_', TBL_CELL_HORIZ },
1.23 schwarze 55: { '=', TBL_CELL_DHORIZ }
1.1 kristaps 56: };
57:
1.26 schwarze 58: static int mods(struct tbl_node *, struct tbl_cell *,
1.5 kristaps 59: int, const char *, int *);
1.26 schwarze 60: static int cell(struct tbl_node *, struct tbl_row *,
1.5 kristaps 61: int, const char *, int *);
1.23 schwarze 62: static struct tbl_cell *cell_alloc(struct tbl_node *, struct tbl_row *,
63: enum tbl_cellt, int vert);
1.1 kristaps 64:
1.26 schwarze 65:
1.1 kristaps 66: static int
1.26 schwarze 67: mods(struct tbl_node *tbl, struct tbl_cell *cp,
1.1 kristaps 68: int ln, const char *p, int *pos)
69: {
70: char buf[5];
71: int i;
1.20 kristaps 72:
73: /* Not all types accept modifiers. */
74:
75: switch (cp->pos) {
1.26 schwarze 76: case TBL_CELL_DOWN:
1.20 kristaps 77: /* FALLTHROUGH */
1.26 schwarze 78: case TBL_CELL_HORIZ:
1.20 kristaps 79: /* FALLTHROUGH */
1.26 schwarze 80: case TBL_CELL_DHORIZ:
1.20 kristaps 81: return(1);
82: default:
83: break;
84: }
1.1 kristaps 85:
86: mod:
1.26 schwarze 87: /*
1.1 kristaps 88: * XXX: since, at least for now, modifiers are non-conflicting
89: * (are separable by value, regardless of position), we let
90: * modifiers come in any order. The existing tbl doesn't let
91: * this happen.
92: */
93: switch (p[*pos]) {
1.26 schwarze 94: case '\0':
1.1 kristaps 95: /* FALLTHROUGH */
1.26 schwarze 96: case ' ':
1.1 kristaps 97: /* FALLTHROUGH */
1.26 schwarze 98: case '\t':
1.1 kristaps 99: /* FALLTHROUGH */
1.26 schwarze 100: case ',':
1.1 kristaps 101: /* FALLTHROUGH */
1.26 schwarze 102: case '.':
1.25 schwarze 103: /* FALLTHROUGH */
1.26 schwarze 104: case '|':
1.1 kristaps 105: return(1);
106: default:
107: break;
1.12 kristaps 108: }
109:
110: /* Throw away parenthesised expression. */
111:
112: if ('(' == p[*pos]) {
113: (*pos)++;
114: while (p[*pos] && ')' != p[*pos])
115: (*pos)++;
116: if (')' == p[*pos]) {
117: (*pos)++;
118: goto mod;
119: }
1.26 schwarze 120: mandoc_msg(MANDOCERR_TBLLAYOUT, tbl->parse,
121: ln, *pos, NULL);
1.12 kristaps 122: return(0);
1.1 kristaps 123: }
124:
125: /* Parse numerical spacing from modifier string. */
126:
127: if (isdigit((unsigned char)p[*pos])) {
128: for (i = 0; i < 4; i++) {
129: if ( ! isdigit((unsigned char)p[*pos + i]))
130: break;
131: buf[i] = p[*pos + i];
132: }
133: buf[i] = '\0';
134:
135: /* No greater than 4 digits. */
136:
137: if (4 == i) {
1.26 schwarze 138: mandoc_msg(MANDOCERR_TBLLAYOUT,
139: tbl->parse, ln, *pos, NULL);
1.1 kristaps 140: return(0);
141: }
142:
143: *pos += i;
1.15 kristaps 144: cp->spacing = (size_t)atoi(buf);
1.1 kristaps 145:
146: goto mod;
147: /* NOTREACHED */
1.26 schwarze 148: }
1.1 kristaps 149:
150: /* TODO: GNU has many more extensions. */
151:
1.13 joerg 152: switch (tolower((unsigned char)p[(*pos)++])) {
1.26 schwarze 153: case 'z':
1.1 kristaps 154: cp->flags |= TBL_CELL_WIGN;
155: goto mod;
1.26 schwarze 156: case 'u':
1.1 kristaps 157: cp->flags |= TBL_CELL_UP;
158: goto mod;
1.26 schwarze 159: case 'e':
1.1 kristaps 160: cp->flags |= TBL_CELL_EQUAL;
161: goto mod;
1.26 schwarze 162: case 't':
1.1 kristaps 163: cp->flags |= TBL_CELL_TALIGN;
164: goto mod;
1.26 schwarze 165: case 'd':
1.1 kristaps 166: cp->flags |= TBL_CELL_BALIGN;
1.10 schwarze 167: goto mod;
1.26 schwarze 168: case 'w': /* XXX for now, ignore minimal column width */
1.29 schwarze 169: goto mod;
170: case 'x':
171: cp->flags |= TBL_CELL_WMAX;
1.1 kristaps 172: goto mod;
1.26 schwarze 173: case 'f':
1.2 kristaps 174: break;
1.26 schwarze 175: case 'r':
1.21 kristaps 176: /* FALLTHROUGH */
1.26 schwarze 177: case 'b':
1.1 kristaps 178: /* FALLTHROUGH */
1.26 schwarze 179: case 'i':
1.2 kristaps 180: (*pos)--;
1.1 kristaps 181: break;
182: default:
1.17 kristaps 183: mandoc_msg(MANDOCERR_TBLLAYOUT, tbl->parse,
1.26 schwarze 184: ln, *pos - 1, NULL);
1.1 kristaps 185: return(0);
186: }
187:
1.13 joerg 188: switch (tolower((unsigned char)p[(*pos)++])) {
1.26 schwarze 189: case '3':
1.21 kristaps 190: /* FALLTHROUGH */
1.26 schwarze 191: case 'b':
1.1 kristaps 192: cp->flags |= TBL_CELL_BOLD;
193: goto mod;
1.26 schwarze 194: case '2':
1.21 kristaps 195: /* FALLTHROUGH */
1.26 schwarze 196: case 'i':
1.1 kristaps 197: cp->flags |= TBL_CELL_ITALIC;
1.21 kristaps 198: goto mod;
1.26 schwarze 199: case '1':
1.21 kristaps 200: /* FALLTHROUGH */
1.26 schwarze 201: case 'r':
1.1 kristaps 202: goto mod;
203: default:
204: break;
1.28 schwarze 205: }
206: if (isalnum((unsigned char)p[*pos - 1])) {
207: mandoc_vmsg(MANDOCERR_FT_BAD, tbl->parse,
208: ln, *pos - 1, "TS f%c", p[*pos - 1]);
209: goto mod;
1.1 kristaps 210: }
211:
1.17 kristaps 212: mandoc_msg(MANDOCERR_TBLLAYOUT, tbl->parse,
1.26 schwarze 213: ln, *pos - 1, NULL);
1.1 kristaps 214: return(0);
215: }
216:
217: static int
1.26 schwarze 218: cell(struct tbl_node *tbl, struct tbl_row *rp,
1.1 kristaps 219: int ln, const char *p, int *pos)
220: {
1.23 schwarze 221: int vert, i;
1.1 kristaps 222: enum tbl_cellt c;
223:
1.23 schwarze 224: /* Handle vertical lines. */
225:
226: for (vert = 0; '|' == p[*pos]; ++*pos)
227: vert++;
228: while (' ' == p[*pos])
229: (*pos)++;
1.25 schwarze 230:
231: /* Handle trailing vertical lines */
232:
233: if ('.' == p[*pos] || '\0' == p[*pos]) {
234: rp->vert = vert;
235: return(1);
236: }
1.23 schwarze 237:
238: /* Parse the column position (`c', `l', `r', ...). */
1.1 kristaps 239:
240: for (i = 0; i < KEYS_MAX; i++)
1.13 joerg 241: if (tolower((unsigned char)p[*pos]) == keys[i].name)
1.1 kristaps 242: break;
243:
244: if (KEYS_MAX == i) {
1.26 schwarze 245: mandoc_msg(MANDOCERR_TBLLAYOUT, tbl->parse,
246: ln, *pos, NULL);
1.1 kristaps 247: return(0);
248: }
249:
1.11 kristaps 250: c = keys[i].key;
251:
252: /*
253: * If a span cell is found first, raise a warning and abort the
1.14 kristaps 254: * parse. If a span cell is found and the last layout element
255: * isn't a "normal" layout, bail.
256: *
257: * FIXME: recover from this somehow?
1.11 kristaps 258: */
259:
1.14 kristaps 260: if (TBL_CELL_SPAN == c) {
261: if (NULL == rp->first) {
1.17 kristaps 262: mandoc_msg(MANDOCERR_TBLLAYOUT, tbl->parse,
1.26 schwarze 263: ln, *pos, NULL);
1.14 kristaps 264: return(0);
265: } else if (rp->last)
266: switch (rp->last->pos) {
1.26 schwarze 267: case TBL_CELL_HORIZ:
268: /* FALLTHROUGH */
269: case TBL_CELL_DHORIZ:
270: mandoc_msg(MANDOCERR_TBLLAYOUT,
271: tbl->parse, ln, *pos, NULL);
1.14 kristaps 272: return(0);
273: default:
274: break;
275: }
1.16 kristaps 276: }
277:
278: /*
279: * If a vertical spanner is found, we may not be in the first
280: * row.
281: */
282:
283: if (TBL_CELL_DOWN == c && rp == tbl->first_row) {
1.17 kristaps 284: mandoc_msg(MANDOCERR_TBLLAYOUT, tbl->parse, ln, *pos, NULL);
1.16 kristaps 285: return(0);
1.11 kristaps 286: }
287:
1.1 kristaps 288: (*pos)++;
289:
290: /* Disallow adjacent spacers. */
291:
1.23 schwarze 292: if (vert > 2) {
1.17 kristaps 293: mandoc_msg(MANDOCERR_TBLLAYOUT, tbl->parse, ln, *pos - 1, NULL);
1.1 kristaps 294: return(0);
295: }
296:
297: /* Allocate cell then parse its modifiers. */
298:
1.23 schwarze 299: return(mods(tbl, cell_alloc(tbl, rp, c, vert), ln, p, pos));
1.1 kristaps 300: }
301:
1.30 ! schwarze 302: int
! 303: tbl_layout(struct tbl_node *tbl, int ln, const char *p)
1.1 kristaps 304: {
305: struct tbl_row *rp;
1.30 ! schwarze 306: int pos;
1.1 kristaps 307:
1.30 ! schwarze 308: pos = 0;
! 309: rp = NULL;
1.1 kristaps 310:
1.30 ! schwarze 311: for (;;) {
! 312: /* Skip whitespace before and after each cell. */
1.1 kristaps 313:
1.30 ! schwarze 314: while (isspace((unsigned char)p[pos]))
! 315: pos++;
1.1 kristaps 316:
1.30 ! schwarze 317: switch (p[pos]) {
! 318: case ',': /* Next row on this input line. */
! 319: pos++;
! 320: rp = NULL;
! 321: continue;
! 322: case '\0': /* Next row on next input line. */
! 323: return(1);
! 324: case '.': /* End of layout. */
! 325: pos++;
! 326: tbl->part = TBL_PART_DATA;
! 327: if (tbl->first_row != NULL)
! 328: return(1);
1.26 schwarze 329: mandoc_msg(MANDOCERR_TBLNOLAYOUT,
1.30 ! schwarze 330: tbl->parse, ln, pos, NULL);
! 331: rp = mandoc_calloc(1, sizeof(*rp));
! 332: cell_alloc(tbl, rp, TBL_CELL_LEFT, 0);
! 333: tbl->first_row = tbl->last_row = rp;
! 334: return(1);
! 335: default: /* Cell. */
! 336: break;
! 337: }
! 338:
! 339: if (rp == NULL) { /* First cell on this line. */
! 340: rp = mandoc_calloc(1, sizeof(*rp));
! 341: if (tbl->last_row)
! 342: tbl->last_row->next = rp;
! 343: else
! 344: tbl->first_row = rp;
! 345: tbl->last_row = rp;
! 346: }
! 347: if ( ! cell(tbl, rp, ln, p, &pos))
! 348: return(1);
1.1 kristaps 349: }
350: }
1.5 kristaps 351:
352: static struct tbl_cell *
1.23 schwarze 353: cell_alloc(struct tbl_node *tbl, struct tbl_row *rp, enum tbl_cellt pos,
354: int vert)
1.5 kristaps 355: {
356: struct tbl_cell *p, *pp;
357: struct tbl_head *h, *hp;
358:
359: p = mandoc_calloc(1, sizeof(struct tbl_cell));
360:
361: if (NULL != (pp = rp->last)) {
1.23 schwarze 362: pp->next = p;
363: h = pp->head->next;
364: } else {
365: rp->first = p;
366: h = tbl->first_head;
367: }
368: rp->last = p;
1.5 kristaps 369:
370: p->pos = pos;
1.23 schwarze 371: p->vert = vert;
1.5 kristaps 372:
1.23 schwarze 373: /* Re-use header. */
1.5 kristaps 374:
375: if (h) {
1.23 schwarze 376: p->head = h;
377: return(p);
1.5 kristaps 378: }
379:
380: hp = mandoc_calloc(1, sizeof(struct tbl_head));
1.9 kristaps 381: hp->ident = tbl->opts.cols++;
1.23 schwarze 382: hp->vert = vert;
1.5 kristaps 383:
384: if (tbl->last_head) {
385: hp->prev = tbl->last_head;
386: tbl->last_head->next = hp;
387: } else
1.23 schwarze 388: tbl->first_head = hp;
389: tbl->last_head = hp;
1.5 kristaps 390:
391: p->head = hp;
392: return(p);
393: }
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