Annotation of src/usr.bin/mandoc/tbl_layout.c, Revision 1.32
1.32 ! schwarze 1: /* $OpenBSD: tbl_layout.c,v 1.31 2017/06/27 18:23:29 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>
1.31 schwarze 21: #include <stdint.h>
1.1 schwarze 22: #include <stdlib.h>
23: #include <string.h>
1.4 schwarze 24: #include <time.h>
1.1 schwarze 25:
1.32 ! schwarze 26: #include "mandoc_aux.h"
1.4 schwarze 27: #include "mandoc.h"
1.32 ! schwarze 28: #include "tbl.h"
1.4 schwarze 29: #include "libmandoc.h"
30: #include "libroff.h"
1.1 schwarze 31:
32: struct tbl_phrase {
33: char name;
34: enum tbl_cellt key;
35: };
36:
1.19 schwarze 37: static const struct tbl_phrase keys[] = {
1.1 schwarze 38: { 'c', TBL_CELL_CENTRE },
39: { 'r', TBL_CELL_RIGHT },
40: { 'l', TBL_CELL_LEFT },
41: { 'n', TBL_CELL_NUMBER },
42: { 's', TBL_CELL_SPAN },
43: { 'a', TBL_CELL_LONG },
44: { '^', TBL_CELL_DOWN },
45: { '-', TBL_CELL_HORIZ },
46: { '_', TBL_CELL_HORIZ },
1.11 schwarze 47: { '=', TBL_CELL_DHORIZ }
1.1 schwarze 48: };
49:
1.19 schwarze 50: #define KEYS_MAX ((int)(sizeof(keys)/sizeof(keys[0])))
51:
52: static void mods(struct tbl_node *, struct tbl_cell *,
1.4 schwarze 53: int, const char *, int *);
1.19 schwarze 54: static void cell(struct tbl_node *, struct tbl_row *,
1.1 schwarze 55: int, const char *, int *);
1.11 schwarze 56: static struct tbl_cell *cell_alloc(struct tbl_node *, struct tbl_row *,
1.20 schwarze 57: enum tbl_cellt);
1.1 schwarze 58:
1.14 schwarze 59:
1.19 schwarze 60: static void
1.14 schwarze 61: mods(struct tbl_node *tbl, struct tbl_cell *cp,
1.4 schwarze 62: int ln, const char *p, int *pos)
1.1 schwarze 63: {
1.19 schwarze 64: char *endptr;
1.29 schwarze 65: size_t sz;
1.1 schwarze 66:
1.19 schwarze 67: mod:
68: while (p[*pos] == ' ' || p[*pos] == '\t')
69: (*pos)++;
1.9 schwarze 70:
1.19 schwarze 71: /* Row delimiters and cell specifiers end modifier lists. */
1.9 schwarze 72:
1.20 schwarze 73: if (strchr(".,-=^_ACLNRSaclnrs", p[*pos]) != NULL)
1.19 schwarze 74: return;
1.1 schwarze 75:
1.6 schwarze 76: /* Throw away parenthesised expression. */
77:
78: if ('(' == p[*pos]) {
79: (*pos)++;
80: while (p[*pos] && ')' != p[*pos])
81: (*pos)++;
82: if (')' == p[*pos]) {
83: (*pos)++;
84: goto mod;
85: }
1.19 schwarze 86: mandoc_msg(MANDOCERR_TBLLAYOUT_PAR, tbl->parse,
1.14 schwarze 87: ln, *pos, NULL);
1.19 schwarze 88: return;
1.6 schwarze 89: }
90:
1.1 schwarze 91: /* Parse numerical spacing from modifier string. */
92:
1.4 schwarze 93: if (isdigit((unsigned char)p[*pos])) {
1.19 schwarze 94: cp->spacing = strtoull(p + *pos, &endptr, 10);
95: *pos = endptr - p;
1.4 schwarze 96: goto mod;
1.14 schwarze 97: }
1.1 schwarze 98:
1.6 schwarze 99: switch (tolower((unsigned char)p[(*pos)++])) {
1.19 schwarze 100: case 'b':
1.25 schwarze 101: cp->flags |= TBL_CELL_BOLD;
102: goto mod;
1.19 schwarze 103: case 'd':
104: cp->flags |= TBL_CELL_BALIGN;
1.4 schwarze 105: goto mod;
1.14 schwarze 106: case 'e':
1.1 schwarze 107: cp->flags |= TBL_CELL_EQUAL;
1.4 schwarze 108: goto mod;
1.19 schwarze 109: case 'f':
110: break;
1.25 schwarze 111: case 'i':
112: cp->flags |= TBL_CELL_ITALIC;
113: goto mod;
1.19 schwarze 114: case 'm':
115: mandoc_msg(MANDOCERR_TBLLAYOUT_MOD, tbl->parse,
116: ln, *pos, "m");
117: goto mod;
118: case 'p':
119: case 'v':
120: if (p[*pos] == '-' || p[*pos] == '+')
121: (*pos)++;
122: while (isdigit((unsigned char)p[*pos]))
123: (*pos)++;
124: goto mod;
1.14 schwarze 125: case 't':
1.1 schwarze 126: cp->flags |= TBL_CELL_TALIGN;
1.4 schwarze 127: goto mod;
1.19 schwarze 128: case 'u':
129: cp->flags |= TBL_CELL_UP;
1.5 schwarze 130: goto mod;
1.29 schwarze 131: case 'w':
132: sz = 0;
133: if (p[*pos] == '(') {
134: (*pos)++;
135: while (p[*pos + sz] != '\0' && p[*pos + sz] != ')')
136: sz++;
137: } else
138: while (isdigit((unsigned char)p[*pos + sz]))
139: sz++;
140: if (sz) {
141: free(cp->wstr);
142: cp->wstr = mandoc_strndup(p + *pos, sz);
143: *pos += sz;
144: if (p[*pos] == ')')
145: (*pos)++;
146: }
1.16 schwarze 147: goto mod;
148: case 'x':
149: cp->flags |= TBL_CELL_WMAX;
1.4 schwarze 150: goto mod;
1.19 schwarze 151: case 'z':
152: cp->flags |= TBL_CELL_WIGN;
153: goto mod;
1.20 schwarze 154: case '|':
155: if (cp->vert < 2)
156: cp->vert++;
157: else
158: mandoc_msg(MANDOCERR_TBLLAYOUT_VERT,
159: tbl->parse, ln, *pos - 1, NULL);
160: goto mod;
1.1 schwarze 161: default:
1.19 schwarze 162: mandoc_vmsg(MANDOCERR_TBLLAYOUT_CHAR, tbl->parse,
163: ln, *pos - 1, "%c", p[*pos - 1]);
164: goto mod;
1.1 schwarze 165: }
166:
1.25 schwarze 167: /* Ignore parenthised font names for now. */
168:
169: if (p[*pos] == '(')
170: goto mod;
171:
172: /* Support only one-character font-names for now. */
173:
174: if (p[*pos] == '\0' || (p[*pos + 1] != ' ' && p[*pos + 1] != '.')) {
175: mandoc_vmsg(MANDOCERR_FT_BAD, tbl->parse,
176: ln, *pos, "TS %s", p + *pos - 1);
177: if (p[*pos] != '\0')
178: (*pos)++;
179: if (p[*pos] != '\0')
180: (*pos)++;
181: goto mod;
182: }
183:
184: switch (p[(*pos)++]) {
1.14 schwarze 185: case '3':
1.25 schwarze 186: case 'B':
1.1 schwarze 187: cp->flags |= TBL_CELL_BOLD;
1.4 schwarze 188: goto mod;
1.14 schwarze 189: case '2':
1.25 schwarze 190: case 'I':
1.1 schwarze 191: cp->flags |= TBL_CELL_ITALIC;
1.10 schwarze 192: goto mod;
1.14 schwarze 193: case '1':
1.25 schwarze 194: case 'R':
1.4 schwarze 195: goto mod;
1.1 schwarze 196: default:
1.15 schwarze 197: mandoc_vmsg(MANDOCERR_FT_BAD, tbl->parse,
198: ln, *pos - 1, "TS f%c", p[*pos - 1]);
199: goto mod;
1.1 schwarze 200: }
201: }
202:
1.19 schwarze 203: static void
1.14 schwarze 204: cell(struct tbl_node *tbl, struct tbl_row *rp,
1.4 schwarze 205: int ln, const char *p, int *pos)
1.1 schwarze 206: {
1.20 schwarze 207: int i;
1.1 schwarze 208: enum tbl_cellt c;
209:
1.20 schwarze 210: /* Handle leading vertical lines */
1.11 schwarze 211:
1.19 schwarze 212: while (p[*pos] == ' ' || p[*pos] == '\t' || p[*pos] == '|') {
213: if (p[*pos] == '|') {
1.20 schwarze 214: if (rp->vert < 2)
215: rp->vert++;
1.19 schwarze 216: else
217: mandoc_msg(MANDOCERR_TBLLAYOUT_VERT,
218: tbl->parse, ln, *pos, NULL);
219: }
1.11 schwarze 220: (*pos)++;
1.19 schwarze 221: }
1.13 schwarze 222:
1.20 schwarze 223: again:
224: while (p[*pos] == ' ' || p[*pos] == '\t')
225: (*pos)++;
1.13 schwarze 226:
1.20 schwarze 227: if (p[*pos] == '.' || p[*pos] == '\0')
1.19 schwarze 228: return;
1.11 schwarze 229:
230: /* Parse the column position (`c', `l', `r', ...). */
1.1 schwarze 231:
1.4 schwarze 232: for (i = 0; i < KEYS_MAX; i++)
1.6 schwarze 233: if (tolower((unsigned char)p[*pos]) == keys[i].name)
1.4 schwarze 234: break;
235:
1.19 schwarze 236: if (i == KEYS_MAX) {
237: mandoc_vmsg(MANDOCERR_TBLLAYOUT_CHAR, tbl->parse,
238: ln, *pos, "%c", p[*pos]);
239: (*pos)++;
240: goto again;
1.1 schwarze 241: }
1.6 schwarze 242: c = keys[i].key;
243:
1.19 schwarze 244: /* Special cases of spanners. */
1.7 schwarze 245:
1.19 schwarze 246: if (c == TBL_CELL_SPAN) {
247: if (rp->last == NULL)
248: mandoc_msg(MANDOCERR_TBLLAYOUT_SPAN,
249: tbl->parse, ln, *pos, NULL);
250: else if (rp->last->pos == TBL_CELL_HORIZ ||
251: rp->last->pos == TBL_CELL_DHORIZ)
252: c = rp->last->pos;
253: } else if (c == TBL_CELL_DOWN && rp == tbl->first_row)
254: mandoc_msg(MANDOCERR_TBLLAYOUT_DOWN,
255: tbl->parse, ln, *pos, NULL);
1.6 schwarze 256:
1.4 schwarze 257: (*pos)++;
1.1 schwarze 258:
259: /* Allocate cell then parse its modifiers. */
260:
1.20 schwarze 261: mods(tbl, cell_alloc(tbl, rp, c), ln, p, pos);
1.1 schwarze 262: }
263:
1.18 schwarze 264: void
1.21 schwarze 265: tbl_layout(struct tbl_node *tbl, int ln, const char *p, int pos)
1.1 schwarze 266: {
267: struct tbl_row *rp;
268:
1.17 schwarze 269: rp = NULL;
270: for (;;) {
271: /* Skip whitespace before and after each cell. */
1.4 schwarze 272:
1.19 schwarze 273: while (p[pos] == ' ' || p[pos] == '\t')
1.17 schwarze 274: pos++;
1.4 schwarze 275:
1.17 schwarze 276: switch (p[pos]) {
277: case ',': /* Next row on this input line. */
278: pos++;
279: rp = NULL;
280: continue;
281: case '\0': /* Next row on next input line. */
1.18 schwarze 282: return;
1.17 schwarze 283: case '.': /* End of layout. */
284: pos++;
285: tbl->part = TBL_PART_DATA;
1.20 schwarze 286:
287: /*
288: * When the layout is completely empty,
289: * default to one left-justified column.
290: */
291:
292: if (tbl->first_row == NULL) {
1.22 schwarze 293: tbl->first_row = tbl->last_row =
294: mandoc_calloc(1, sizeof(*rp));
295: }
296: if (tbl->first_row->first == NULL) {
1.20 schwarze 297: mandoc_msg(MANDOCERR_TBLLAYOUT_NONE,
298: tbl->parse, ln, pos, NULL);
1.22 schwarze 299: cell_alloc(tbl, tbl->first_row,
300: TBL_CELL_LEFT);
1.30 schwarze 301: if (tbl->opts.lvert < tbl->first_row->vert)
302: tbl->opts.lvert = tbl->first_row->vert;
1.18 schwarze 303: return;
1.20 schwarze 304: }
305:
306: /*
307: * Search for the widest line
308: * along the left and right margins.
309: */
310:
311: for (rp = tbl->first_row; rp; rp = rp->next) {
312: if (tbl->opts.lvert < rp->vert)
313: tbl->opts.lvert = rp->vert;
314: if (rp->last != NULL &&
1.24 schwarze 315: rp->last->col + 1 == tbl->opts.cols &&
1.20 schwarze 316: tbl->opts.rvert < rp->last->vert)
317: tbl->opts.rvert = rp->last->vert;
1.22 schwarze 318:
319: /* If the last line is empty, drop it. */
320:
321: if (rp->next != NULL &&
322: rp->next->first == NULL) {
323: free(rp->next);
324: rp->next = NULL;
1.26 schwarze 325: tbl->last_row = rp;
1.22 schwarze 326: }
1.20 schwarze 327: }
1.18 schwarze 328: return;
1.17 schwarze 329: default: /* Cell. */
330: break;
331: }
332:
1.22 schwarze 333: /*
334: * If the last line had at least one cell,
335: * start a new one; otherwise, continue it.
336: */
337:
338: if (rp == NULL) {
339: if (tbl->last_row == NULL ||
340: tbl->last_row->first != NULL) {
341: rp = mandoc_calloc(1, sizeof(*rp));
342: if (tbl->last_row)
343: tbl->last_row->next = rp;
344: else
345: tbl->first_row = rp;
346: tbl->last_row = rp;
347: } else
348: rp = tbl->last_row;
1.17 schwarze 349: }
1.19 schwarze 350: cell(tbl, rp, ln, p, &pos);
1.1 schwarze 351: }
352: }
1.4 schwarze 353:
354: static struct tbl_cell *
1.20 schwarze 355: cell_alloc(struct tbl_node *tbl, struct tbl_row *rp, enum tbl_cellt pos)
1.4 schwarze 356: {
357: struct tbl_cell *p, *pp;
358:
1.23 schwarze 359: p = mandoc_calloc(1, sizeof(*p));
1.31 schwarze 360: p->spacing = SIZE_MAX;
1.24 schwarze 361: p->pos = pos;
1.4 schwarze 362:
1.23 schwarze 363: if ((pp = rp->last) != NULL) {
1.11 schwarze 364: pp->next = p;
1.24 schwarze 365: p->col = pp->col + 1;
366: } else
1.11 schwarze 367: rp->first = p;
368: rp->last = p;
1.4 schwarze 369:
1.24 schwarze 370: if (tbl->opts.cols <= p->col)
371: tbl->opts.cols = p->col + 1;
1.4 schwarze 372:
1.27 schwarze 373: return p;
1.4 schwarze 374: }
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