Annotation of src/usr.bin/mandoc/tbl_layout.c, Revision 1.37
1.37 ! schwarze 1: /* $OpenBSD: tbl_layout.c,v 1.36 2020/09/01 18:24:10 schwarze Exp $ */
1.1 schwarze 2: /*
1.4 schwarze 3: * Copyright (c) 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
1.37 ! schwarze 4: * Copyright (c) 2012, 2014, 2015, 2017, 2020, 2021
! 5: * Ingo Schwarze <schwarze@openbsd.org>
1.1 schwarze 6: *
7: * Permission to use, copy, modify, and distribute this software for any
8: * purpose with or without fee is hereby granted, provided that the above
9: * copyright notice and this permission notice appear in all copies.
10: *
11: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
12: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
13: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
14: * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
15: * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
16: * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
17: * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
18: */
1.16 schwarze 19: #include <sys/types.h>
20:
1.1 schwarze 21: #include <ctype.h>
1.31 schwarze 22: #include <stdint.h>
1.34 schwarze 23: #include <stdio.h>
1.1 schwarze 24: #include <stdlib.h>
25: #include <string.h>
1.4 schwarze 26: #include <time.h>
1.1 schwarze 27:
1.32 schwarze 28: #include "mandoc_aux.h"
1.4 schwarze 29: #include "mandoc.h"
1.32 schwarze 30: #include "tbl.h"
1.4 schwarze 31: #include "libmandoc.h"
1.33 schwarze 32: #include "tbl_int.h"
1.1 schwarze 33:
34: struct tbl_phrase {
35: char name;
36: enum tbl_cellt key;
37: };
38:
1.19 schwarze 39: static const struct tbl_phrase keys[] = {
1.1 schwarze 40: { 'c', TBL_CELL_CENTRE },
41: { 'r', TBL_CELL_RIGHT },
42: { 'l', TBL_CELL_LEFT },
43: { 'n', TBL_CELL_NUMBER },
44: { 's', TBL_CELL_SPAN },
45: { 'a', TBL_CELL_LONG },
46: { '^', TBL_CELL_DOWN },
47: { '-', TBL_CELL_HORIZ },
48: { '_', TBL_CELL_HORIZ },
1.11 schwarze 49: { '=', TBL_CELL_DHORIZ }
1.1 schwarze 50: };
51:
1.19 schwarze 52: #define KEYS_MAX ((int)(sizeof(keys)/sizeof(keys[0])))
53:
54: static void mods(struct tbl_node *, struct tbl_cell *,
1.4 schwarze 55: int, const char *, int *);
1.19 schwarze 56: static void cell(struct tbl_node *, struct tbl_row *,
1.1 schwarze 57: int, const char *, int *);
1.11 schwarze 58: static struct tbl_cell *cell_alloc(struct tbl_node *, struct tbl_row *,
1.20 schwarze 59: enum tbl_cellt);
1.1 schwarze 60:
1.14 schwarze 61:
1.19 schwarze 62: static void
1.14 schwarze 63: mods(struct tbl_node *tbl, struct tbl_cell *cp,
1.4 schwarze 64: int ln, const char *p, int *pos)
1.1 schwarze 65: {
1.19 schwarze 66: char *endptr;
1.36 schwarze 67: unsigned long spacing;
1.29 schwarze 68: size_t sz;
1.37 ! schwarze 69: int isz;
! 70: enum mandoc_esc fontesc;
1.1 schwarze 71:
1.19 schwarze 72: mod:
73: while (p[*pos] == ' ' || p[*pos] == '\t')
74: (*pos)++;
1.9 schwarze 75:
1.19 schwarze 76: /* Row delimiters and cell specifiers end modifier lists. */
1.9 schwarze 77:
1.20 schwarze 78: if (strchr(".,-=^_ACLNRSaclnrs", p[*pos]) != NULL)
1.19 schwarze 79: return;
1.1 schwarze 80:
1.6 schwarze 81: /* Throw away parenthesised expression. */
82:
83: if ('(' == p[*pos]) {
84: (*pos)++;
85: while (p[*pos] && ')' != p[*pos])
86: (*pos)++;
87: if (')' == p[*pos]) {
88: (*pos)++;
89: goto mod;
90: }
1.35 schwarze 91: mandoc_msg(MANDOCERR_TBLLAYOUT_PAR, ln, *pos, NULL);
1.19 schwarze 92: return;
1.6 schwarze 93: }
94:
1.1 schwarze 95: /* Parse numerical spacing from modifier string. */
96:
1.4 schwarze 97: if (isdigit((unsigned char)p[*pos])) {
1.36 schwarze 98: if ((spacing = strtoul(p + *pos, &endptr, 10)) > 9)
99: mandoc_msg(MANDOCERR_TBLLAYOUT_SPC, ln, *pos,
100: "%lu", spacing);
101: else
102: cp->spacing = spacing;
1.19 schwarze 103: *pos = endptr - p;
1.4 schwarze 104: goto mod;
1.14 schwarze 105: }
1.1 schwarze 106:
1.6 schwarze 107: switch (tolower((unsigned char)p[(*pos)++])) {
1.19 schwarze 108: case 'b':
1.37 ! schwarze 109: cp->font = ESCAPE_FONTBOLD;
1.25 schwarze 110: goto mod;
1.19 schwarze 111: case 'd':
112: cp->flags |= TBL_CELL_BALIGN;
1.4 schwarze 113: goto mod;
1.14 schwarze 114: case 'e':
1.1 schwarze 115: cp->flags |= TBL_CELL_EQUAL;
1.4 schwarze 116: goto mod;
1.19 schwarze 117: case 'f':
118: break;
1.25 schwarze 119: case 'i':
1.37 ! schwarze 120: cp->font = ESCAPE_FONTITALIC;
1.25 schwarze 121: goto mod;
1.19 schwarze 122: case 'm':
1.35 schwarze 123: mandoc_msg(MANDOCERR_TBLLAYOUT_MOD, ln, *pos, "m");
1.19 schwarze 124: goto mod;
125: case 'p':
126: case 'v':
127: if (p[*pos] == '-' || p[*pos] == '+')
128: (*pos)++;
129: while (isdigit((unsigned char)p[*pos]))
130: (*pos)++;
131: goto mod;
1.14 schwarze 132: case 't':
1.1 schwarze 133: cp->flags |= TBL_CELL_TALIGN;
1.4 schwarze 134: goto mod;
1.19 schwarze 135: case 'u':
136: cp->flags |= TBL_CELL_UP;
1.5 schwarze 137: goto mod;
1.29 schwarze 138: case 'w':
139: sz = 0;
140: if (p[*pos] == '(') {
141: (*pos)++;
142: while (p[*pos + sz] != '\0' && p[*pos + sz] != ')')
143: sz++;
144: } else
145: while (isdigit((unsigned char)p[*pos + sz]))
146: sz++;
147: if (sz) {
148: free(cp->wstr);
149: cp->wstr = mandoc_strndup(p + *pos, sz);
150: *pos += sz;
151: if (p[*pos] == ')')
152: (*pos)++;
153: }
1.16 schwarze 154: goto mod;
155: case 'x':
156: cp->flags |= TBL_CELL_WMAX;
1.4 schwarze 157: goto mod;
1.19 schwarze 158: case 'z':
159: cp->flags |= TBL_CELL_WIGN;
160: goto mod;
1.20 schwarze 161: case '|':
162: if (cp->vert < 2)
163: cp->vert++;
164: else
165: mandoc_msg(MANDOCERR_TBLLAYOUT_VERT,
1.35 schwarze 166: ln, *pos - 1, NULL);
1.20 schwarze 167: goto mod;
1.1 schwarze 168: default:
1.35 schwarze 169: mandoc_msg(MANDOCERR_TBLLAYOUT_CHAR,
1.19 schwarze 170: ln, *pos - 1, "%c", p[*pos - 1]);
171: goto mod;
1.1 schwarze 172: }
173:
1.37 ! schwarze 174: while (p[*pos] == ' ' || p[*pos] == '\t')
! 175: (*pos)++;
! 176:
1.25 schwarze 177: /* Ignore parenthised font names for now. */
178:
179: if (p[*pos] == '(')
180: goto mod;
181:
1.37 ! schwarze 182: isz = 0;
! 183: if (p[*pos] != '\0')
! 184: isz++;
! 185: if (strchr(" \t.", p[*pos + isz]) == NULL)
! 186: isz++;
! 187:
! 188: fontesc = mandoc_font(p + *pos, isz);
! 189:
! 190: switch (fontesc) {
! 191: case ESCAPE_FONTPREV:
! 192: case ESCAPE_ERROR:
1.35 schwarze 193: mandoc_msg(MANDOCERR_FT_BAD,
1.25 schwarze 194: ln, *pos, "TS %s", p + *pos - 1);
1.37 ! schwarze 195: break;
1.1 schwarze 196: default:
1.37 ! schwarze 197: cp->font = fontesc;
! 198: break;
1.1 schwarze 199: }
1.37 ! schwarze 200: *pos += isz;
! 201: goto mod;
1.1 schwarze 202: }
203:
1.19 schwarze 204: static void
1.14 schwarze 205: cell(struct tbl_node *tbl, struct tbl_row *rp,
1.4 schwarze 206: int ln, const char *p, int *pos)
1.1 schwarze 207: {
1.20 schwarze 208: int i;
1.1 schwarze 209: enum tbl_cellt c;
210:
1.20 schwarze 211: /* Handle leading vertical lines */
1.11 schwarze 212:
1.19 schwarze 213: while (p[*pos] == ' ' || p[*pos] == '\t' || p[*pos] == '|') {
214: if (p[*pos] == '|') {
1.20 schwarze 215: if (rp->vert < 2)
216: rp->vert++;
1.19 schwarze 217: else
218: mandoc_msg(MANDOCERR_TBLLAYOUT_VERT,
1.35 schwarze 219: ln, *pos, NULL);
1.19 schwarze 220: }
1.11 schwarze 221: (*pos)++;
1.19 schwarze 222: }
1.13 schwarze 223:
1.20 schwarze 224: again:
225: while (p[*pos] == ' ' || p[*pos] == '\t')
226: (*pos)++;
1.13 schwarze 227:
1.20 schwarze 228: if (p[*pos] == '.' || p[*pos] == '\0')
1.19 schwarze 229: return;
1.11 schwarze 230:
231: /* Parse the column position (`c', `l', `r', ...). */
1.1 schwarze 232:
1.4 schwarze 233: for (i = 0; i < KEYS_MAX; i++)
1.6 schwarze 234: if (tolower((unsigned char)p[*pos]) == keys[i].name)
1.4 schwarze 235: break;
236:
1.19 schwarze 237: if (i == KEYS_MAX) {
1.35 schwarze 238: mandoc_msg(MANDOCERR_TBLLAYOUT_CHAR,
1.19 schwarze 239: ln, *pos, "%c", p[*pos]);
240: (*pos)++;
241: goto again;
1.1 schwarze 242: }
1.6 schwarze 243: c = keys[i].key;
244:
1.19 schwarze 245: /* Special cases of spanners. */
1.7 schwarze 246:
1.19 schwarze 247: if (c == TBL_CELL_SPAN) {
248: if (rp->last == NULL)
1.35 schwarze 249: mandoc_msg(MANDOCERR_TBLLAYOUT_SPAN, ln, *pos, NULL);
1.19 schwarze 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)
1.35 schwarze 254: mandoc_msg(MANDOCERR_TBLLAYOUT_DOWN, ln, *pos, NULL);
1.6 schwarze 255:
1.4 schwarze 256: (*pos)++;
1.1 schwarze 257:
258: /* Allocate cell then parse its modifiers. */
259:
1.20 schwarze 260: mods(tbl, cell_alloc(tbl, rp, c), ln, p, pos);
1.1 schwarze 261: }
262:
1.18 schwarze 263: void
1.21 schwarze 264: tbl_layout(struct tbl_node *tbl, int ln, const char *p, int pos)
1.1 schwarze 265: {
266: struct tbl_row *rp;
267:
1.17 schwarze 268: rp = NULL;
269: for (;;) {
270: /* Skip whitespace before and after each cell. */
1.4 schwarze 271:
1.19 schwarze 272: while (p[pos] == ' ' || p[pos] == '\t')
1.17 schwarze 273: pos++;
1.4 schwarze 274:
1.17 schwarze 275: switch (p[pos]) {
276: case ',': /* Next row on this input line. */
277: pos++;
278: rp = NULL;
279: continue;
280: case '\0': /* Next row on next input line. */
1.18 schwarze 281: return;
1.17 schwarze 282: case '.': /* End of layout. */
283: pos++;
284: tbl->part = TBL_PART_DATA;
1.20 schwarze 285:
286: /*
287: * When the layout is completely empty,
288: * default to one left-justified column.
289: */
290:
291: if (tbl->first_row == NULL) {
1.22 schwarze 292: tbl->first_row = tbl->last_row =
293: mandoc_calloc(1, sizeof(*rp));
294: }
295: if (tbl->first_row->first == NULL) {
1.20 schwarze 296: mandoc_msg(MANDOCERR_TBLLAYOUT_NONE,
1.35 schwarze 297: ln, pos, NULL);
1.22 schwarze 298: cell_alloc(tbl, tbl->first_row,
299: TBL_CELL_LEFT);
1.30 schwarze 300: if (tbl->opts.lvert < tbl->first_row->vert)
301: tbl->opts.lvert = tbl->first_row->vert;
1.18 schwarze 302: return;
1.20 schwarze 303: }
304:
305: /*
306: * Search for the widest line
307: * along the left and right margins.
308: */
309:
310: for (rp = tbl->first_row; rp; rp = rp->next) {
311: if (tbl->opts.lvert < rp->vert)
312: tbl->opts.lvert = rp->vert;
313: if (rp->last != NULL &&
1.24 schwarze 314: rp->last->col + 1 == tbl->opts.cols &&
1.20 schwarze 315: tbl->opts.rvert < rp->last->vert)
316: tbl->opts.rvert = rp->last->vert;
1.22 schwarze 317:
318: /* If the last line is empty, drop it. */
319:
320: if (rp->next != NULL &&
321: rp->next->first == NULL) {
322: free(rp->next);
323: rp->next = NULL;
1.26 schwarze 324: tbl->last_row = rp;
1.22 schwarze 325: }
1.20 schwarze 326: }
1.18 schwarze 327: return;
1.17 schwarze 328: default: /* Cell. */
329: break;
330: }
331:
1.22 schwarze 332: /*
333: * If the last line had at least one cell,
334: * start a new one; otherwise, continue it.
335: */
336:
337: if (rp == NULL) {
338: if (tbl->last_row == NULL ||
339: tbl->last_row->first != NULL) {
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: } else
347: rp = tbl->last_row;
1.17 schwarze 348: }
1.19 schwarze 349: cell(tbl, rp, ln, p, &pos);
1.1 schwarze 350: }
351: }
1.4 schwarze 352:
353: static struct tbl_cell *
1.20 schwarze 354: cell_alloc(struct tbl_node *tbl, struct tbl_row *rp, enum tbl_cellt pos)
1.4 schwarze 355: {
356: struct tbl_cell *p, *pp;
357:
1.23 schwarze 358: p = mandoc_calloc(1, sizeof(*p));
1.31 schwarze 359: p->spacing = SIZE_MAX;
1.37 ! schwarze 360: p->font = ESCAPE_FONTROMAN;
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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