Annotation of mandoc/tbl_layout.c, Revision 1.51
1.51 ! schwarze 1: /* $Id: tbl_layout.c,v 1.50 2021/08/10 12:55:04 schwarze Exp $ */
1.1 kristaps 2: /*
1.51 ! schwarze 3: * Copyright (c) 2012, 2014, 2015, 2017, 2020, 2021, 2025
! 4: * Ingo Schwarze <schwarze@openbsd.org>
1.22 schwarze 5: * Copyright (c) 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
1.1 kristaps 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: */
1.18 kristaps 19: #include "config.h"
1.27 schwarze 20:
21: #include <sys/types.h>
1.18 kristaps 22:
1.1 kristaps 23: #include <ctype.h>
1.44 schwarze 24: #include <stdint.h>
1.47 schwarze 25: #include <stdio.h>
1.1 kristaps 26: #include <stdlib.h>
27: #include <string.h>
1.4 kristaps 28: #include <time.h>
1.1 kristaps 29:
1.45 schwarze 30: #include "mandoc_aux.h"
1.1 kristaps 31: #include "mandoc.h"
1.45 schwarze 32: #include "tbl.h"
1.1 kristaps 33: #include "libmandoc.h"
1.46 schwarze 34: #include "tbl_int.h"
1.1 kristaps 35:
36: struct tbl_phrase {
37: char name;
38: enum tbl_cellt key;
39: };
40:
1.32 schwarze 41: static const struct tbl_phrase keys[] = {
1.1 kristaps 42: { 'c', TBL_CELL_CENTRE },
43: { 'r', TBL_CELL_RIGHT },
44: { 'l', TBL_CELL_LEFT },
45: { 'n', TBL_CELL_NUMBER },
46: { 's', TBL_CELL_SPAN },
47: { 'a', TBL_CELL_LONG },
48: { '^', TBL_CELL_DOWN },
49: { '-', TBL_CELL_HORIZ },
50: { '_', TBL_CELL_HORIZ },
1.23 schwarze 51: { '=', TBL_CELL_DHORIZ }
1.1 kristaps 52: };
53:
1.32 schwarze 54: #define KEYS_MAX ((int)(sizeof(keys)/sizeof(keys[0])))
55:
56: static void mods(struct tbl_node *, struct tbl_cell *,
1.5 kristaps 57: int, const char *, int *);
1.32 schwarze 58: static void cell(struct tbl_node *, struct tbl_row *,
1.5 kristaps 59: int, const char *, int *);
1.23 schwarze 60: static struct tbl_cell *cell_alloc(struct tbl_node *, struct tbl_row *,
1.33 schwarze 61: enum tbl_cellt);
1.1 kristaps 62:
1.26 schwarze 63:
1.32 schwarze 64: static void
1.26 schwarze 65: mods(struct tbl_node *tbl, struct tbl_cell *cp,
1.1 kristaps 66: int ln, const char *p, int *pos)
67: {
1.32 schwarze 68: char *endptr;
1.49 schwarze 69: unsigned long spacing;
1.50 schwarze 70: int isz;
71: enum mandoc_esc fontesc;
1.20 kristaps 72:
1.32 schwarze 73: mod:
74: while (p[*pos] == ' ' || p[*pos] == '\t')
75: (*pos)++;
1.20 kristaps 76:
1.32 schwarze 77: /* Row delimiters and cell specifiers end modifier lists. */
1.1 kristaps 78:
1.33 schwarze 79: if (strchr(".,-=^_ACLNRSaclnrs", p[*pos]) != NULL)
1.32 schwarze 80: return;
1.12 kristaps 81:
82: /* Throw away parenthesised expression. */
83:
84: if ('(' == p[*pos]) {
85: (*pos)++;
86: while (p[*pos] && ')' != p[*pos])
87: (*pos)++;
88: if (')' == p[*pos]) {
89: (*pos)++;
90: goto mod;
91: }
1.48 schwarze 92: mandoc_msg(MANDOCERR_TBLLAYOUT_PAR, ln, *pos, NULL);
1.32 schwarze 93: return;
1.1 kristaps 94: }
95:
96: /* Parse numerical spacing from modifier string. */
97:
98: if (isdigit((unsigned char)p[*pos])) {
1.49 schwarze 99: if ((spacing = strtoul(p + *pos, &endptr, 10)) > 9)
100: mandoc_msg(MANDOCERR_TBLLAYOUT_SPC, ln, *pos,
101: "%lu", spacing);
102: else
103: cp->spacing = spacing;
1.32 schwarze 104: *pos = endptr - p;
1.1 kristaps 105: goto mod;
1.26 schwarze 106: }
1.1 kristaps 107:
1.13 joerg 108: switch (tolower((unsigned char)p[(*pos)++])) {
1.32 schwarze 109: case 'b':
1.50 schwarze 110: cp->font = ESCAPE_FONTBOLD;
1.38 schwarze 111: goto mod;
1.32 schwarze 112: case 'd':
113: cp->flags |= TBL_CELL_BALIGN;
1.1 kristaps 114: goto mod;
1.26 schwarze 115: case 'e':
1.1 kristaps 116: cp->flags |= TBL_CELL_EQUAL;
117: goto mod;
1.32 schwarze 118: case 'f':
119: break;
1.38 schwarze 120: case 'i':
1.50 schwarze 121: cp->font = ESCAPE_FONTITALIC;
1.38 schwarze 122: goto mod;
1.32 schwarze 123: case 'm':
1.48 schwarze 124: mandoc_msg(MANDOCERR_TBLLAYOUT_MOD, ln, *pos, "m");
1.32 schwarze 125: goto mod;
126: case 'p':
127: case 'v':
128: if (p[*pos] == '-' || p[*pos] == '+')
129: (*pos)++;
130: while (isdigit((unsigned char)p[*pos]))
131: (*pos)++;
132: goto mod;
1.26 schwarze 133: case 't':
1.1 kristaps 134: cp->flags |= TBL_CELL_TALIGN;
135: goto mod;
1.32 schwarze 136: case 'u':
137: cp->flags |= TBL_CELL_UP;
1.10 schwarze 138: goto mod;
1.42 schwarze 139: case 'w':
140: if (p[*pos] == '(') {
141: (*pos)++;
1.51 ! schwarze 142: isz = 0;
! 143: if (roff_evalnum(ln, p, pos, &isz, 'n', 1) == 0 ||
! 144: p[*pos] != ')')
! 145: mandoc_msg(MANDOCERR_TBLLAYOUT_WIDTH,
! 146: ln, *pos, "%s", p + *pos);
! 147: else {
! 148: /* Convert from BU to EN and round. */
! 149: cp->width = (isz + 11) /24;
1.42 schwarze 150: (*pos)++;
1.51 ! schwarze 151: }
! 152: } else {
! 153: cp->width = 0;
! 154: while (isdigit((unsigned char)p[*pos])) {
! 155: cp->width *= 10;
! 156: cp->width += p[(*pos)++] - '0';
! 157: }
! 158: if (cp->width == 0)
! 159: mandoc_msg(MANDOCERR_TBLLAYOUT_WIDTH,
! 160: ln, *pos, "%s", p + *pos);
1.42 schwarze 161: }
1.29 schwarze 162: goto mod;
163: case 'x':
164: cp->flags |= TBL_CELL_WMAX;
1.1 kristaps 165: goto mod;
1.32 schwarze 166: case 'z':
167: cp->flags |= TBL_CELL_WIGN;
168: goto mod;
1.33 schwarze 169: case '|':
170: if (cp->vert < 2)
171: cp->vert++;
172: else
173: mandoc_msg(MANDOCERR_TBLLAYOUT_VERT,
1.48 schwarze 174: ln, *pos - 1, NULL);
1.33 schwarze 175: goto mod;
1.1 kristaps 176: default:
1.48 schwarze 177: mandoc_msg(MANDOCERR_TBLLAYOUT_CHAR,
1.32 schwarze 178: ln, *pos - 1, "%c", p[*pos - 1]);
179: goto mod;
1.1 kristaps 180: }
181:
1.50 schwarze 182: while (p[*pos] == ' ' || p[*pos] == '\t')
183: (*pos)++;
184:
1.38 schwarze 185: /* Ignore parenthised font names for now. */
186:
187: if (p[*pos] == '(')
188: goto mod;
189:
1.50 schwarze 190: isz = 0;
191: if (p[*pos] != '\0')
192: isz++;
193: if (strchr(" \t.", p[*pos + isz]) == NULL)
194: isz++;
195:
196: fontesc = mandoc_font(p + *pos, isz);
197:
198: switch (fontesc) {
199: case ESCAPE_FONTPREV:
200: case ESCAPE_ERROR:
1.48 schwarze 201: mandoc_msg(MANDOCERR_FT_BAD,
1.38 schwarze 202: ln, *pos, "TS %s", p + *pos - 1);
1.50 schwarze 203: break;
1.1 kristaps 204: default:
1.50 schwarze 205: cp->font = fontesc;
206: break;
1.1 kristaps 207: }
1.50 schwarze 208: *pos += isz;
209: goto mod;
1.1 kristaps 210: }
211:
1.32 schwarze 212: static void
1.26 schwarze 213: cell(struct tbl_node *tbl, struct tbl_row *rp,
1.1 kristaps 214: int ln, const char *p, int *pos)
215: {
1.33 schwarze 216: int i;
1.1 kristaps 217: enum tbl_cellt c;
218:
1.33 schwarze 219: /* Handle leading vertical lines */
1.23 schwarze 220:
1.32 schwarze 221: while (p[*pos] == ' ' || p[*pos] == '\t' || p[*pos] == '|') {
222: if (p[*pos] == '|') {
1.33 schwarze 223: if (rp->vert < 2)
224: rp->vert++;
1.32 schwarze 225: else
226: mandoc_msg(MANDOCERR_TBLLAYOUT_VERT,
1.48 schwarze 227: ln, *pos, NULL);
1.32 schwarze 228: }
1.23 schwarze 229: (*pos)++;
1.32 schwarze 230: }
1.25 schwarze 231:
1.33 schwarze 232: again:
233: while (p[*pos] == ' ' || p[*pos] == '\t')
234: (*pos)++;
1.25 schwarze 235:
1.33 schwarze 236: if (p[*pos] == '.' || p[*pos] == '\0')
1.32 schwarze 237: return;
1.23 schwarze 238:
239: /* Parse the column position (`c', `l', `r', ...). */
1.1 kristaps 240:
241: for (i = 0; i < KEYS_MAX; i++)
1.13 joerg 242: if (tolower((unsigned char)p[*pos]) == keys[i].name)
1.1 kristaps 243: break;
244:
1.32 schwarze 245: if (i == KEYS_MAX) {
1.48 schwarze 246: mandoc_msg(MANDOCERR_TBLLAYOUT_CHAR,
1.32 schwarze 247: ln, *pos, "%c", p[*pos]);
248: (*pos)++;
249: goto again;
1.1 kristaps 250: }
1.11 kristaps 251: c = keys[i].key;
252:
1.32 schwarze 253: /* Special cases of spanners. */
1.16 kristaps 254:
1.32 schwarze 255: if (c == TBL_CELL_SPAN) {
256: if (rp->last == NULL)
1.48 schwarze 257: mandoc_msg(MANDOCERR_TBLLAYOUT_SPAN, ln, *pos, NULL);
1.32 schwarze 258: else if (rp->last->pos == TBL_CELL_HORIZ ||
259: rp->last->pos == TBL_CELL_DHORIZ)
260: c = rp->last->pos;
261: } else if (c == TBL_CELL_DOWN && rp == tbl->first_row)
1.48 schwarze 262: mandoc_msg(MANDOCERR_TBLLAYOUT_DOWN, ln, *pos, NULL);
1.11 kristaps 263:
1.1 kristaps 264: (*pos)++;
265:
266: /* Allocate cell then parse its modifiers. */
267:
1.33 schwarze 268: mods(tbl, cell_alloc(tbl, rp, c), ln, p, pos);
1.1 kristaps 269: }
270:
1.31 schwarze 271: void
1.34 schwarze 272: tbl_layout(struct tbl_node *tbl, int ln, const char *p, int pos)
1.1 kristaps 273: {
274: struct tbl_row *rp;
275:
1.30 schwarze 276: rp = NULL;
277: for (;;) {
278: /* Skip whitespace before and after each cell. */
1.1 kristaps 279:
1.32 schwarze 280: while (p[pos] == ' ' || p[pos] == '\t')
1.30 schwarze 281: pos++;
1.1 kristaps 282:
1.30 schwarze 283: switch (p[pos]) {
284: case ',': /* Next row on this input line. */
285: pos++;
286: rp = NULL;
287: continue;
288: case '\0': /* Next row on next input line. */
1.31 schwarze 289: return;
1.30 schwarze 290: case '.': /* End of layout. */
291: pos++;
292: tbl->part = TBL_PART_DATA;
1.33 schwarze 293:
294: /*
295: * When the layout is completely empty,
296: * default to one left-justified column.
297: */
298:
299: if (tbl->first_row == NULL) {
1.35 schwarze 300: tbl->first_row = tbl->last_row =
301: mandoc_calloc(1, sizeof(*rp));
302: }
303: if (tbl->first_row->first == NULL) {
1.33 schwarze 304: mandoc_msg(MANDOCERR_TBLLAYOUT_NONE,
1.48 schwarze 305: ln, pos, NULL);
1.35 schwarze 306: cell_alloc(tbl, tbl->first_row,
307: TBL_CELL_LEFT);
1.43 schwarze 308: if (tbl->opts.lvert < tbl->first_row->vert)
309: tbl->opts.lvert = tbl->first_row->vert;
1.31 schwarze 310: return;
1.33 schwarze 311: }
312:
313: /*
314: * Search for the widest line
315: * along the left and right margins.
316: */
317:
318: for (rp = tbl->first_row; rp; rp = rp->next) {
319: if (tbl->opts.lvert < rp->vert)
320: tbl->opts.lvert = rp->vert;
321: if (rp->last != NULL &&
1.37 schwarze 322: rp->last->col + 1 == tbl->opts.cols &&
1.33 schwarze 323: tbl->opts.rvert < rp->last->vert)
324: tbl->opts.rvert = rp->last->vert;
1.35 schwarze 325:
326: /* If the last line is empty, drop it. */
327:
328: if (rp->next != NULL &&
329: rp->next->first == NULL) {
330: free(rp->next);
331: rp->next = NULL;
1.39 schwarze 332: tbl->last_row = rp;
1.35 schwarze 333: }
1.33 schwarze 334: }
1.31 schwarze 335: return;
1.30 schwarze 336: default: /* Cell. */
337: break;
338: }
339:
1.35 schwarze 340: /*
341: * If the last line had at least one cell,
342: * start a new one; otherwise, continue it.
343: */
344:
345: if (rp == NULL) {
346: if (tbl->last_row == NULL ||
347: tbl->last_row->first != NULL) {
348: rp = mandoc_calloc(1, sizeof(*rp));
349: if (tbl->last_row)
350: tbl->last_row->next = rp;
351: else
352: tbl->first_row = rp;
353: tbl->last_row = rp;
354: } else
355: rp = tbl->last_row;
1.30 schwarze 356: }
1.32 schwarze 357: cell(tbl, rp, ln, p, &pos);
1.1 kristaps 358: }
359: }
1.5 kristaps 360:
361: static struct tbl_cell *
1.33 schwarze 362: cell_alloc(struct tbl_node *tbl, struct tbl_row *rp, enum tbl_cellt pos)
1.5 kristaps 363: {
364: struct tbl_cell *p, *pp;
365:
1.36 schwarze 366: p = mandoc_calloc(1, sizeof(*p));
1.44 schwarze 367: p->spacing = SIZE_MAX;
1.50 schwarze 368: p->font = ESCAPE_FONTROMAN;
1.37 schwarze 369: p->pos = pos;
1.5 kristaps 370:
1.36 schwarze 371: if ((pp = rp->last) != NULL) {
1.23 schwarze 372: pp->next = p;
1.37 schwarze 373: p->col = pp->col + 1;
374: } else
1.23 schwarze 375: rp->first = p;
376: rp->last = p;
1.5 kristaps 377:
1.37 schwarze 378: if (tbl->opts.cols <= p->col)
379: tbl->opts.cols = p->col + 1;
1.5 kristaps 380:
1.40 schwarze 381: return p;
1.5 kristaps 382: }
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