Annotation of src/usr.bin/mandoc/tbl_layout.c, Revision 1.28
1.28 ! schwarze 1: /* $OpenBSD: tbl_layout.c,v 1.27 2015/10/06 18:30:44 schwarze Exp $ */
1.1 schwarze 2: /*
1.4 schwarze 3: * Copyright (c) 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
1.19 schwarze 4: * Copyright (c) 2012, 2014, 2015 Ingo Schwarze <schwarze@openbsd.org>
1.1 schwarze 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: */
1.16 schwarze 18: #include <sys/types.h>
19:
1.1 schwarze 20: #include <ctype.h>
21: #include <stdlib.h>
22: #include <string.h>
1.4 schwarze 23: #include <time.h>
1.1 schwarze 24:
1.4 schwarze 25: #include "mandoc.h"
1.12 schwarze 26: #include "mandoc_aux.h"
1.4 schwarze 27: #include "libmandoc.h"
28: #include "libroff.h"
1.1 schwarze 29:
30: struct tbl_phrase {
31: char name;
32: enum tbl_cellt key;
33: };
34:
1.19 schwarze 35: static const struct tbl_phrase keys[] = {
1.1 schwarze 36: { 'c', TBL_CELL_CENTRE },
37: { 'r', TBL_CELL_RIGHT },
38: { 'l', TBL_CELL_LEFT },
39: { 'n', TBL_CELL_NUMBER },
40: { 's', TBL_CELL_SPAN },
41: { 'a', TBL_CELL_LONG },
42: { '^', TBL_CELL_DOWN },
43: { '-', TBL_CELL_HORIZ },
44: { '_', TBL_CELL_HORIZ },
1.11 schwarze 45: { '=', TBL_CELL_DHORIZ }
1.1 schwarze 46: };
47:
1.19 schwarze 48: #define KEYS_MAX ((int)(sizeof(keys)/sizeof(keys[0])))
49:
50: static void mods(struct tbl_node *, struct tbl_cell *,
1.4 schwarze 51: int, const char *, int *);
1.19 schwarze 52: static void cell(struct tbl_node *, struct tbl_row *,
1.1 schwarze 53: int, const char *, int *);
1.11 schwarze 54: static struct tbl_cell *cell_alloc(struct tbl_node *, struct tbl_row *,
1.20 schwarze 55: enum tbl_cellt);
1.1 schwarze 56:
1.14 schwarze 57:
1.19 schwarze 58: static void
1.14 schwarze 59: mods(struct tbl_node *tbl, struct tbl_cell *cp,
1.4 schwarze 60: int ln, const char *p, int *pos)
1.1 schwarze 61: {
1.19 schwarze 62: char *endptr;
1.1 schwarze 63:
1.19 schwarze 64: mod:
65: while (p[*pos] == ' ' || p[*pos] == '\t')
66: (*pos)++;
1.9 schwarze 67:
1.19 schwarze 68: /* Row delimiters and cell specifiers end modifier lists. */
1.9 schwarze 69:
1.20 schwarze 70: if (strchr(".,-=^_ACLNRSaclnrs", p[*pos]) != NULL)
1.19 schwarze 71: return;
1.1 schwarze 72:
1.6 schwarze 73: /* Throw away parenthesised expression. */
74:
75: if ('(' == p[*pos]) {
76: (*pos)++;
77: while (p[*pos] && ')' != p[*pos])
78: (*pos)++;
79: if (')' == p[*pos]) {
80: (*pos)++;
81: goto mod;
82: }
1.19 schwarze 83: mandoc_msg(MANDOCERR_TBLLAYOUT_PAR, tbl->parse,
1.14 schwarze 84: ln, *pos, NULL);
1.19 schwarze 85: return;
1.6 schwarze 86: }
87:
1.1 schwarze 88: /* Parse numerical spacing from modifier string. */
89:
1.4 schwarze 90: if (isdigit((unsigned char)p[*pos])) {
1.19 schwarze 91: cp->spacing = strtoull(p + *pos, &endptr, 10);
92: *pos = endptr - p;
1.4 schwarze 93: goto mod;
1.14 schwarze 94: }
1.1 schwarze 95:
1.6 schwarze 96: switch (tolower((unsigned char)p[(*pos)++])) {
1.19 schwarze 97: case 'b':
1.25 schwarze 98: cp->flags |= TBL_CELL_BOLD;
99: goto mod;
1.19 schwarze 100: case 'd':
101: cp->flags |= TBL_CELL_BALIGN;
1.4 schwarze 102: goto mod;
1.14 schwarze 103: case 'e':
1.1 schwarze 104: cp->flags |= TBL_CELL_EQUAL;
1.4 schwarze 105: goto mod;
1.19 schwarze 106: case 'f':
107: break;
1.25 schwarze 108: case 'i':
109: cp->flags |= TBL_CELL_ITALIC;
110: goto mod;
1.19 schwarze 111: case 'm':
112: mandoc_msg(MANDOCERR_TBLLAYOUT_MOD, tbl->parse,
113: ln, *pos, "m");
114: goto mod;
115: case 'p':
116: case 'v':
117: if (p[*pos] == '-' || p[*pos] == '+')
118: (*pos)++;
119: while (isdigit((unsigned char)p[*pos]))
120: (*pos)++;
121: goto mod;
1.14 schwarze 122: case 't':
1.1 schwarze 123: cp->flags |= TBL_CELL_TALIGN;
1.4 schwarze 124: goto mod;
1.19 schwarze 125: case 'u':
126: cp->flags |= TBL_CELL_UP;
1.5 schwarze 127: goto mod;
1.14 schwarze 128: case 'w': /* XXX for now, ignore minimal column width */
1.16 schwarze 129: goto mod;
130: case 'x':
131: cp->flags |= TBL_CELL_WMAX;
1.4 schwarze 132: goto mod;
1.19 schwarze 133: case 'z':
134: cp->flags |= TBL_CELL_WIGN;
135: goto mod;
1.20 schwarze 136: case '|':
137: if (cp->vert < 2)
138: cp->vert++;
139: else
140: mandoc_msg(MANDOCERR_TBLLAYOUT_VERT,
141: tbl->parse, ln, *pos - 1, NULL);
142: goto mod;
1.1 schwarze 143: default:
1.19 schwarze 144: mandoc_vmsg(MANDOCERR_TBLLAYOUT_CHAR, tbl->parse,
145: ln, *pos - 1, "%c", p[*pos - 1]);
146: goto mod;
1.1 schwarze 147: }
148:
1.25 schwarze 149: /* Ignore parenthised font names for now. */
150:
151: if (p[*pos] == '(')
152: goto mod;
153:
154: /* Support only one-character font-names for now. */
155:
156: if (p[*pos] == '\0' || (p[*pos + 1] != ' ' && p[*pos + 1] != '.')) {
157: mandoc_vmsg(MANDOCERR_FT_BAD, tbl->parse,
158: ln, *pos, "TS %s", p + *pos - 1);
159: if (p[*pos] != '\0')
160: (*pos)++;
161: if (p[*pos] != '\0')
162: (*pos)++;
163: goto mod;
164: }
165:
166: switch (p[(*pos)++]) {
1.14 schwarze 167: case '3':
1.25 schwarze 168: case 'B':
1.1 schwarze 169: cp->flags |= TBL_CELL_BOLD;
1.4 schwarze 170: goto mod;
1.14 schwarze 171: case '2':
1.25 schwarze 172: case 'I':
1.1 schwarze 173: cp->flags |= TBL_CELL_ITALIC;
1.10 schwarze 174: goto mod;
1.14 schwarze 175: case '1':
1.25 schwarze 176: case 'R':
1.4 schwarze 177: goto mod;
1.1 schwarze 178: default:
1.15 schwarze 179: mandoc_vmsg(MANDOCERR_FT_BAD, tbl->parse,
180: ln, *pos - 1, "TS f%c", p[*pos - 1]);
181: goto mod;
1.1 schwarze 182: }
183: }
184:
1.19 schwarze 185: static void
1.14 schwarze 186: cell(struct tbl_node *tbl, struct tbl_row *rp,
1.4 schwarze 187: int ln, const char *p, int *pos)
1.1 schwarze 188: {
1.20 schwarze 189: int i;
1.1 schwarze 190: enum tbl_cellt c;
191:
1.20 schwarze 192: /* Handle leading vertical lines */
1.11 schwarze 193:
1.19 schwarze 194: while (p[*pos] == ' ' || p[*pos] == '\t' || p[*pos] == '|') {
195: if (p[*pos] == '|') {
1.20 schwarze 196: if (rp->vert < 2)
197: rp->vert++;
1.19 schwarze 198: else
199: mandoc_msg(MANDOCERR_TBLLAYOUT_VERT,
200: tbl->parse, ln, *pos, NULL);
201: }
1.11 schwarze 202: (*pos)++;
1.19 schwarze 203: }
1.13 schwarze 204:
1.20 schwarze 205: again:
206: while (p[*pos] == ' ' || p[*pos] == '\t')
207: (*pos)++;
1.13 schwarze 208:
1.20 schwarze 209: if (p[*pos] == '.' || p[*pos] == '\0')
1.19 schwarze 210: return;
1.11 schwarze 211:
212: /* Parse the column position (`c', `l', `r', ...). */
1.1 schwarze 213:
1.4 schwarze 214: for (i = 0; i < KEYS_MAX; i++)
1.6 schwarze 215: if (tolower((unsigned char)p[*pos]) == keys[i].name)
1.4 schwarze 216: break;
217:
1.19 schwarze 218: if (i == KEYS_MAX) {
219: mandoc_vmsg(MANDOCERR_TBLLAYOUT_CHAR, tbl->parse,
220: ln, *pos, "%c", p[*pos]);
221: (*pos)++;
222: goto again;
1.1 schwarze 223: }
1.6 schwarze 224: c = keys[i].key;
225:
1.19 schwarze 226: /* Special cases of spanners. */
1.7 schwarze 227:
1.19 schwarze 228: if (c == TBL_CELL_SPAN) {
229: if (rp->last == NULL)
230: mandoc_msg(MANDOCERR_TBLLAYOUT_SPAN,
231: tbl->parse, ln, *pos, NULL);
232: else if (rp->last->pos == TBL_CELL_HORIZ ||
233: rp->last->pos == TBL_CELL_DHORIZ)
234: c = rp->last->pos;
235: } else if (c == TBL_CELL_DOWN && rp == tbl->first_row)
236: mandoc_msg(MANDOCERR_TBLLAYOUT_DOWN,
237: tbl->parse, ln, *pos, NULL);
1.6 schwarze 238:
1.4 schwarze 239: (*pos)++;
1.1 schwarze 240:
241: /* Allocate cell then parse its modifiers. */
242:
1.20 schwarze 243: mods(tbl, cell_alloc(tbl, rp, c), ln, p, pos);
1.1 schwarze 244: }
245:
1.18 schwarze 246: void
1.21 schwarze 247: tbl_layout(struct tbl_node *tbl, int ln, const char *p, int pos)
1.1 schwarze 248: {
249: struct tbl_row *rp;
250:
1.17 schwarze 251: rp = NULL;
252: for (;;) {
253: /* Skip whitespace before and after each cell. */
1.4 schwarze 254:
1.19 schwarze 255: while (p[pos] == ' ' || p[pos] == '\t')
1.17 schwarze 256: pos++;
1.4 schwarze 257:
1.17 schwarze 258: switch (p[pos]) {
259: case ',': /* Next row on this input line. */
260: pos++;
261: rp = NULL;
262: continue;
263: case '\0': /* Next row on next input line. */
1.18 schwarze 264: return;
1.17 schwarze 265: case '.': /* End of layout. */
266: pos++;
267: tbl->part = TBL_PART_DATA;
1.20 schwarze 268:
269: /*
270: * When the layout is completely empty,
271: * default to one left-justified column.
272: */
273:
274: if (tbl->first_row == NULL) {
1.22 schwarze 275: tbl->first_row = tbl->last_row =
276: mandoc_calloc(1, sizeof(*rp));
277: }
278: if (tbl->first_row->first == NULL) {
1.20 schwarze 279: mandoc_msg(MANDOCERR_TBLLAYOUT_NONE,
280: tbl->parse, ln, pos, NULL);
1.22 schwarze 281: cell_alloc(tbl, tbl->first_row,
282: TBL_CELL_LEFT);
1.18 schwarze 283: return;
1.20 schwarze 284: }
285:
286: /*
287: * Search for the widest line
288: * along the left and right margins.
289: */
290:
291: for (rp = tbl->first_row; rp; rp = rp->next) {
292: if (tbl->opts.lvert < rp->vert)
293: tbl->opts.lvert = rp->vert;
294: if (rp->last != NULL &&
1.24 schwarze 295: rp->last->col + 1 == tbl->opts.cols &&
1.20 schwarze 296: tbl->opts.rvert < rp->last->vert)
297: tbl->opts.rvert = rp->last->vert;
1.22 schwarze 298:
299: /* If the last line is empty, drop it. */
300:
301: if (rp->next != NULL &&
302: rp->next->first == NULL) {
303: free(rp->next);
304: rp->next = NULL;
1.26 schwarze 305: tbl->last_row = rp;
1.22 schwarze 306: }
1.20 schwarze 307: }
1.18 schwarze 308: return;
1.17 schwarze 309: default: /* Cell. */
310: break;
311: }
312:
1.22 schwarze 313: /*
314: * If the last line had at least one cell,
315: * start a new one; otherwise, continue it.
316: */
317:
318: if (rp == NULL) {
319: if (tbl->last_row == NULL ||
320: tbl->last_row->first != NULL) {
321: rp = mandoc_calloc(1, sizeof(*rp));
322: if (tbl->last_row)
323: tbl->last_row->next = rp;
324: else
325: tbl->first_row = rp;
326: tbl->last_row = rp;
327: } else
328: rp = tbl->last_row;
1.17 schwarze 329: }
1.19 schwarze 330: cell(tbl, rp, ln, p, &pos);
1.1 schwarze 331: }
332: }
1.4 schwarze 333:
334: static struct tbl_cell *
1.20 schwarze 335: cell_alloc(struct tbl_node *tbl, struct tbl_row *rp, enum tbl_cellt pos)
1.4 schwarze 336: {
337: struct tbl_cell *p, *pp;
338:
1.23 schwarze 339: p = mandoc_calloc(1, sizeof(*p));
1.24 schwarze 340: p->pos = pos;
1.4 schwarze 341:
1.23 schwarze 342: if ((pp = rp->last) != NULL) {
1.11 schwarze 343: pp->next = p;
1.24 schwarze 344: p->col = pp->col + 1;
345: } else
1.11 schwarze 346: rp->first = p;
347: rp->last = p;
1.4 schwarze 348:
1.24 schwarze 349: if (tbl->opts.cols <= p->col)
350: tbl->opts.cols = p->col + 1;
1.4 schwarze 351:
1.27 schwarze 352: return p;
1.4 schwarze 353: }
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