Annotation of src/usr.bin/mandoc/tbl_layout.c, Revision 1.29
1.29 ! schwarze 1: /* $OpenBSD: tbl_layout.c,v 1.28 2015/10/12 00:07:27 schwarze Exp $ */
1.1 schwarze 2: /*
1.4 schwarze 3: * Copyright (c) 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
1.29 ! schwarze 4: * Copyright (c) 2012, 2014, 2015, 2017 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;
1.29 ! schwarze 63: size_t sz;
1.1 schwarze 64:
1.19 schwarze 65: mod:
66: while (p[*pos] == ' ' || p[*pos] == '\t')
67: (*pos)++;
1.9 schwarze 68:
1.19 schwarze 69: /* Row delimiters and cell specifiers end modifier lists. */
1.9 schwarze 70:
1.20 schwarze 71: if (strchr(".,-=^_ACLNRSaclnrs", p[*pos]) != NULL)
1.19 schwarze 72: return;
1.1 schwarze 73:
1.6 schwarze 74: /* Throw away parenthesised expression. */
75:
76: if ('(' == p[*pos]) {
77: (*pos)++;
78: while (p[*pos] && ')' != p[*pos])
79: (*pos)++;
80: if (')' == p[*pos]) {
81: (*pos)++;
82: goto mod;
83: }
1.19 schwarze 84: mandoc_msg(MANDOCERR_TBLLAYOUT_PAR, tbl->parse,
1.14 schwarze 85: ln, *pos, NULL);
1.19 schwarze 86: return;
1.6 schwarze 87: }
88:
1.1 schwarze 89: /* Parse numerical spacing from modifier string. */
90:
1.4 schwarze 91: if (isdigit((unsigned char)p[*pos])) {
1.19 schwarze 92: cp->spacing = strtoull(p + *pos, &endptr, 10);
93: *pos = endptr - p;
1.4 schwarze 94: goto mod;
1.14 schwarze 95: }
1.1 schwarze 96:
1.6 schwarze 97: switch (tolower((unsigned char)p[(*pos)++])) {
1.19 schwarze 98: case 'b':
1.25 schwarze 99: cp->flags |= TBL_CELL_BOLD;
100: goto mod;
1.19 schwarze 101: case 'd':
102: cp->flags |= TBL_CELL_BALIGN;
1.4 schwarze 103: goto mod;
1.14 schwarze 104: case 'e':
1.1 schwarze 105: cp->flags |= TBL_CELL_EQUAL;
1.4 schwarze 106: goto mod;
1.19 schwarze 107: case 'f':
108: break;
1.25 schwarze 109: case 'i':
110: cp->flags |= TBL_CELL_ITALIC;
111: goto mod;
1.19 schwarze 112: case 'm':
113: mandoc_msg(MANDOCERR_TBLLAYOUT_MOD, tbl->parse,
114: ln, *pos, "m");
115: goto mod;
116: case 'p':
117: case 'v':
118: if (p[*pos] == '-' || p[*pos] == '+')
119: (*pos)++;
120: while (isdigit((unsigned char)p[*pos]))
121: (*pos)++;
122: goto mod;
1.14 schwarze 123: case 't':
1.1 schwarze 124: cp->flags |= TBL_CELL_TALIGN;
1.4 schwarze 125: goto mod;
1.19 schwarze 126: case 'u':
127: cp->flags |= TBL_CELL_UP;
1.5 schwarze 128: goto mod;
1.29 ! schwarze 129: case 'w':
! 130: sz = 0;
! 131: if (p[*pos] == '(') {
! 132: (*pos)++;
! 133: while (p[*pos + sz] != '\0' && p[*pos + sz] != ')')
! 134: sz++;
! 135: } else
! 136: while (isdigit((unsigned char)p[*pos + sz]))
! 137: sz++;
! 138: if (sz) {
! 139: free(cp->wstr);
! 140: cp->wstr = mandoc_strndup(p + *pos, sz);
! 141: *pos += sz;
! 142: if (p[*pos] == ')')
! 143: (*pos)++;
! 144: }
1.16 schwarze 145: goto mod;
146: case 'x':
147: cp->flags |= TBL_CELL_WMAX;
1.4 schwarze 148: goto mod;
1.19 schwarze 149: case 'z':
150: cp->flags |= TBL_CELL_WIGN;
151: goto mod;
1.20 schwarze 152: case '|':
153: if (cp->vert < 2)
154: cp->vert++;
155: else
156: mandoc_msg(MANDOCERR_TBLLAYOUT_VERT,
157: tbl->parse, ln, *pos - 1, NULL);
158: goto mod;
1.1 schwarze 159: default:
1.19 schwarze 160: mandoc_vmsg(MANDOCERR_TBLLAYOUT_CHAR, tbl->parse,
161: ln, *pos - 1, "%c", p[*pos - 1]);
162: goto mod;
1.1 schwarze 163: }
164:
1.25 schwarze 165: /* Ignore parenthised font names for now. */
166:
167: if (p[*pos] == '(')
168: goto mod;
169:
170: /* Support only one-character font-names for now. */
171:
172: if (p[*pos] == '\0' || (p[*pos + 1] != ' ' && p[*pos + 1] != '.')) {
173: mandoc_vmsg(MANDOCERR_FT_BAD, tbl->parse,
174: ln, *pos, "TS %s", p + *pos - 1);
175: if (p[*pos] != '\0')
176: (*pos)++;
177: if (p[*pos] != '\0')
178: (*pos)++;
179: goto mod;
180: }
181:
182: switch (p[(*pos)++]) {
1.14 schwarze 183: case '3':
1.25 schwarze 184: case 'B':
1.1 schwarze 185: cp->flags |= TBL_CELL_BOLD;
1.4 schwarze 186: goto mod;
1.14 schwarze 187: case '2':
1.25 schwarze 188: case 'I':
1.1 schwarze 189: cp->flags |= TBL_CELL_ITALIC;
1.10 schwarze 190: goto mod;
1.14 schwarze 191: case '1':
1.25 schwarze 192: case 'R':
1.4 schwarze 193: goto mod;
1.1 schwarze 194: default:
1.15 schwarze 195: mandoc_vmsg(MANDOCERR_FT_BAD, tbl->parse,
196: ln, *pos - 1, "TS f%c", p[*pos - 1]);
197: goto mod;
1.1 schwarze 198: }
199: }
200:
1.19 schwarze 201: static void
1.14 schwarze 202: cell(struct tbl_node *tbl, struct tbl_row *rp,
1.4 schwarze 203: int ln, const char *p, int *pos)
1.1 schwarze 204: {
1.20 schwarze 205: int i;
1.1 schwarze 206: enum tbl_cellt c;
207:
1.20 schwarze 208: /* Handle leading vertical lines */
1.11 schwarze 209:
1.19 schwarze 210: while (p[*pos] == ' ' || p[*pos] == '\t' || p[*pos] == '|') {
211: if (p[*pos] == '|') {
1.20 schwarze 212: if (rp->vert < 2)
213: rp->vert++;
1.19 schwarze 214: else
215: mandoc_msg(MANDOCERR_TBLLAYOUT_VERT,
216: tbl->parse, ln, *pos, NULL);
217: }
1.11 schwarze 218: (*pos)++;
1.19 schwarze 219: }
1.13 schwarze 220:
1.20 schwarze 221: again:
222: while (p[*pos] == ' ' || p[*pos] == '\t')
223: (*pos)++;
1.13 schwarze 224:
1.20 schwarze 225: if (p[*pos] == '.' || p[*pos] == '\0')
1.19 schwarze 226: return;
1.11 schwarze 227:
228: /* Parse the column position (`c', `l', `r', ...). */
1.1 schwarze 229:
1.4 schwarze 230: for (i = 0; i < KEYS_MAX; i++)
1.6 schwarze 231: if (tolower((unsigned char)p[*pos]) == keys[i].name)
1.4 schwarze 232: break;
233:
1.19 schwarze 234: if (i == KEYS_MAX) {
235: mandoc_vmsg(MANDOCERR_TBLLAYOUT_CHAR, tbl->parse,
236: ln, *pos, "%c", p[*pos]);
237: (*pos)++;
238: goto again;
1.1 schwarze 239: }
1.6 schwarze 240: c = keys[i].key;
241:
1.19 schwarze 242: /* Special cases of spanners. */
1.7 schwarze 243:
1.19 schwarze 244: if (c == TBL_CELL_SPAN) {
245: if (rp->last == NULL)
246: mandoc_msg(MANDOCERR_TBLLAYOUT_SPAN,
247: tbl->parse, ln, *pos, NULL);
248: else if (rp->last->pos == TBL_CELL_HORIZ ||
249: rp->last->pos == TBL_CELL_DHORIZ)
250: c = rp->last->pos;
251: } else if (c == TBL_CELL_DOWN && rp == tbl->first_row)
252: mandoc_msg(MANDOCERR_TBLLAYOUT_DOWN,
253: tbl->parse, ln, *pos, NULL);
1.6 schwarze 254:
1.4 schwarze 255: (*pos)++;
1.1 schwarze 256:
257: /* Allocate cell then parse its modifiers. */
258:
1.20 schwarze 259: mods(tbl, cell_alloc(tbl, rp, c), ln, p, pos);
1.1 schwarze 260: }
261:
1.18 schwarze 262: void
1.21 schwarze 263: tbl_layout(struct tbl_node *tbl, int ln, const char *p, int pos)
1.1 schwarze 264: {
265: struct tbl_row *rp;
266:
1.17 schwarze 267: rp = NULL;
268: for (;;) {
269: /* Skip whitespace before and after each cell. */
1.4 schwarze 270:
1.19 schwarze 271: while (p[pos] == ' ' || p[pos] == '\t')
1.17 schwarze 272: pos++;
1.4 schwarze 273:
1.17 schwarze 274: switch (p[pos]) {
275: case ',': /* Next row on this input line. */
276: pos++;
277: rp = NULL;
278: continue;
279: case '\0': /* Next row on next input line. */
1.18 schwarze 280: return;
1.17 schwarze 281: case '.': /* End of layout. */
282: pos++;
283: tbl->part = TBL_PART_DATA;
1.20 schwarze 284:
285: /*
286: * When the layout is completely empty,
287: * default to one left-justified column.
288: */
289:
290: if (tbl->first_row == NULL) {
1.22 schwarze 291: tbl->first_row = tbl->last_row =
292: mandoc_calloc(1, sizeof(*rp));
293: }
294: if (tbl->first_row->first == NULL) {
1.20 schwarze 295: mandoc_msg(MANDOCERR_TBLLAYOUT_NONE,
296: tbl->parse, ln, pos, NULL);
1.22 schwarze 297: cell_alloc(tbl, tbl->first_row,
298: TBL_CELL_LEFT);
1.18 schwarze 299: return;
1.20 schwarze 300: }
301:
302: /*
303: * Search for the widest line
304: * along the left and right margins.
305: */
306:
307: for (rp = tbl->first_row; rp; rp = rp->next) {
308: if (tbl->opts.lvert < rp->vert)
309: tbl->opts.lvert = rp->vert;
310: if (rp->last != NULL &&
1.24 schwarze 311: rp->last->col + 1 == tbl->opts.cols &&
1.20 schwarze 312: tbl->opts.rvert < rp->last->vert)
313: tbl->opts.rvert = rp->last->vert;
1.22 schwarze 314:
315: /* If the last line is empty, drop it. */
316:
317: if (rp->next != NULL &&
318: rp->next->first == NULL) {
319: free(rp->next);
320: rp->next = NULL;
1.26 schwarze 321: tbl->last_row = rp;
1.22 schwarze 322: }
1.20 schwarze 323: }
1.18 schwarze 324: return;
1.17 schwarze 325: default: /* Cell. */
326: break;
327: }
328:
1.22 schwarze 329: /*
330: * If the last line had at least one cell,
331: * start a new one; otherwise, continue it.
332: */
333:
334: if (rp == NULL) {
335: if (tbl->last_row == NULL ||
336: tbl->last_row->first != NULL) {
337: rp = mandoc_calloc(1, sizeof(*rp));
338: if (tbl->last_row)
339: tbl->last_row->next = rp;
340: else
341: tbl->first_row = rp;
342: tbl->last_row = rp;
343: } else
344: rp = tbl->last_row;
1.17 schwarze 345: }
1.19 schwarze 346: cell(tbl, rp, ln, p, &pos);
1.1 schwarze 347: }
348: }
1.4 schwarze 349:
350: static struct tbl_cell *
1.20 schwarze 351: cell_alloc(struct tbl_node *tbl, struct tbl_row *rp, enum tbl_cellt pos)
1.4 schwarze 352: {
353: struct tbl_cell *p, *pp;
354:
1.23 schwarze 355: p = mandoc_calloc(1, sizeof(*p));
1.24 schwarze 356: p->pos = pos;
1.4 schwarze 357:
1.23 schwarze 358: if ((pp = rp->last) != NULL) {
1.11 schwarze 359: pp->next = p;
1.24 schwarze 360: p->col = pp->col + 1;
361: } else
1.11 schwarze 362: rp->first = p;
363: rp->last = p;
1.4 schwarze 364:
1.24 schwarze 365: if (tbl->opts.cols <= p->col)
366: tbl->opts.cols = p->col + 1;
1.4 schwarze 367:
1.27 schwarze 368: return p;
1.4 schwarze 369: }
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