Annotation of mandoc/tbl_layout.c, Revision 1.50
1.50 ! schwarze 1: /* $Id: tbl_layout.c,v 1.49 2020/09/01 18:25:28 schwarze Exp $ */
1.1 kristaps 2: /*
1.22 schwarze 3: * Copyright (c) 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
1.50 ! schwarze 4: * Copyright (c) 2012, 2014, 2015, 2017, 2020, 2021
! 5: * Ingo Schwarze <schwarze@openbsd.org>
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;
1.42 schwarze 70: size_t sz;
1.50 ! schwarze 71: int isz;
! 72: enum mandoc_esc fontesc;
1.20 kristaps 73:
1.32 schwarze 74: mod:
75: while (p[*pos] == ' ' || p[*pos] == '\t')
76: (*pos)++;
1.20 kristaps 77:
1.32 schwarze 78: /* Row delimiters and cell specifiers end modifier lists. */
1.1 kristaps 79:
1.33 schwarze 80: if (strchr(".,-=^_ACLNRSaclnrs", p[*pos]) != NULL)
1.32 schwarze 81: return;
1.12 kristaps 82:
83: /* Throw away parenthesised expression. */
84:
85: if ('(' == p[*pos]) {
86: (*pos)++;
87: while (p[*pos] && ')' != p[*pos])
88: (*pos)++;
89: if (')' == p[*pos]) {
90: (*pos)++;
91: goto mod;
92: }
1.48 schwarze 93: mandoc_msg(MANDOCERR_TBLLAYOUT_PAR, ln, *pos, NULL);
1.32 schwarze 94: return;
1.1 kristaps 95: }
96:
97: /* Parse numerical spacing from modifier string. */
98:
99: if (isdigit((unsigned char)p[*pos])) {
1.49 schwarze 100: if ((spacing = strtoul(p + *pos, &endptr, 10)) > 9)
101: mandoc_msg(MANDOCERR_TBLLAYOUT_SPC, ln, *pos,
102: "%lu", spacing);
103: else
104: cp->spacing = spacing;
1.32 schwarze 105: *pos = endptr - p;
1.1 kristaps 106: goto mod;
1.26 schwarze 107: }
1.1 kristaps 108:
1.13 joerg 109: switch (tolower((unsigned char)p[(*pos)++])) {
1.32 schwarze 110: case 'b':
1.50 ! schwarze 111: cp->font = ESCAPE_FONTBOLD;
1.38 schwarze 112: goto mod;
1.32 schwarze 113: case 'd':
114: cp->flags |= TBL_CELL_BALIGN;
1.1 kristaps 115: goto mod;
1.26 schwarze 116: case 'e':
1.1 kristaps 117: cp->flags |= TBL_CELL_EQUAL;
118: goto mod;
1.32 schwarze 119: case 'f':
120: break;
1.38 schwarze 121: case 'i':
1.50 ! schwarze 122: cp->font = ESCAPE_FONTITALIC;
1.38 schwarze 123: goto mod;
1.32 schwarze 124: case 'm':
1.48 schwarze 125: mandoc_msg(MANDOCERR_TBLLAYOUT_MOD, ln, *pos, "m");
1.32 schwarze 126: goto mod;
127: case 'p':
128: case 'v':
129: if (p[*pos] == '-' || p[*pos] == '+')
130: (*pos)++;
131: while (isdigit((unsigned char)p[*pos]))
132: (*pos)++;
133: goto mod;
1.26 schwarze 134: case 't':
1.1 kristaps 135: cp->flags |= TBL_CELL_TALIGN;
136: goto mod;
1.32 schwarze 137: case 'u':
138: cp->flags |= TBL_CELL_UP;
1.10 schwarze 139: goto mod;
1.42 schwarze 140: case 'w':
141: sz = 0;
142: if (p[*pos] == '(') {
143: (*pos)++;
144: while (p[*pos + sz] != '\0' && p[*pos + sz] != ')')
145: sz++;
146: } else
147: while (isdigit((unsigned char)p[*pos + sz]))
148: sz++;
149: if (sz) {
150: free(cp->wstr);
151: cp->wstr = mandoc_strndup(p + *pos, sz);
152: *pos += sz;
153: if (p[*pos] == ')')
154: (*pos)++;
155: }
1.29 schwarze 156: goto mod;
157: case 'x':
158: cp->flags |= TBL_CELL_WMAX;
1.1 kristaps 159: goto mod;
1.32 schwarze 160: case 'z':
161: cp->flags |= TBL_CELL_WIGN;
162: goto mod;
1.33 schwarze 163: case '|':
164: if (cp->vert < 2)
165: cp->vert++;
166: else
167: mandoc_msg(MANDOCERR_TBLLAYOUT_VERT,
1.48 schwarze 168: ln, *pos - 1, NULL);
1.33 schwarze 169: goto mod;
1.1 kristaps 170: default:
1.48 schwarze 171: mandoc_msg(MANDOCERR_TBLLAYOUT_CHAR,
1.32 schwarze 172: ln, *pos - 1, "%c", p[*pos - 1]);
173: goto mod;
1.1 kristaps 174: }
175:
1.50 ! schwarze 176: while (p[*pos] == ' ' || p[*pos] == '\t')
! 177: (*pos)++;
! 178:
1.38 schwarze 179: /* Ignore parenthised font names for now. */
180:
181: if (p[*pos] == '(')
182: goto mod;
183:
1.50 ! schwarze 184: isz = 0;
! 185: if (p[*pos] != '\0')
! 186: isz++;
! 187: if (strchr(" \t.", p[*pos + isz]) == NULL)
! 188: isz++;
! 189:
! 190: fontesc = mandoc_font(p + *pos, isz);
! 191:
! 192: switch (fontesc) {
! 193: case ESCAPE_FONTPREV:
! 194: case ESCAPE_ERROR:
1.48 schwarze 195: mandoc_msg(MANDOCERR_FT_BAD,
1.38 schwarze 196: ln, *pos, "TS %s", p + *pos - 1);
1.50 ! schwarze 197: break;
1.1 kristaps 198: default:
1.50 ! schwarze 199: cp->font = fontesc;
! 200: break;
1.1 kristaps 201: }
1.50 ! schwarze 202: *pos += isz;
! 203: goto mod;
1.1 kristaps 204: }
205:
1.32 schwarze 206: static void
1.26 schwarze 207: cell(struct tbl_node *tbl, struct tbl_row *rp,
1.1 kristaps 208: int ln, const char *p, int *pos)
209: {
1.33 schwarze 210: int i;
1.1 kristaps 211: enum tbl_cellt c;
212:
1.33 schwarze 213: /* Handle leading vertical lines */
1.23 schwarze 214:
1.32 schwarze 215: while (p[*pos] == ' ' || p[*pos] == '\t' || p[*pos] == '|') {
216: if (p[*pos] == '|') {
1.33 schwarze 217: if (rp->vert < 2)
218: rp->vert++;
1.32 schwarze 219: else
220: mandoc_msg(MANDOCERR_TBLLAYOUT_VERT,
1.48 schwarze 221: ln, *pos, NULL);
1.32 schwarze 222: }
1.23 schwarze 223: (*pos)++;
1.32 schwarze 224: }
1.25 schwarze 225:
1.33 schwarze 226: again:
227: while (p[*pos] == ' ' || p[*pos] == '\t')
228: (*pos)++;
1.25 schwarze 229:
1.33 schwarze 230: if (p[*pos] == '.' || p[*pos] == '\0')
1.32 schwarze 231: return;
1.23 schwarze 232:
233: /* Parse the column position (`c', `l', `r', ...). */
1.1 kristaps 234:
235: for (i = 0; i < KEYS_MAX; i++)
1.13 joerg 236: if (tolower((unsigned char)p[*pos]) == keys[i].name)
1.1 kristaps 237: break;
238:
1.32 schwarze 239: if (i == KEYS_MAX) {
1.48 schwarze 240: mandoc_msg(MANDOCERR_TBLLAYOUT_CHAR,
1.32 schwarze 241: ln, *pos, "%c", p[*pos]);
242: (*pos)++;
243: goto again;
1.1 kristaps 244: }
1.11 kristaps 245: c = keys[i].key;
246:
1.32 schwarze 247: /* Special cases of spanners. */
1.16 kristaps 248:
1.32 schwarze 249: if (c == TBL_CELL_SPAN) {
250: if (rp->last == NULL)
1.48 schwarze 251: mandoc_msg(MANDOCERR_TBLLAYOUT_SPAN, ln, *pos, NULL);
1.32 schwarze 252: else if (rp->last->pos == TBL_CELL_HORIZ ||
253: rp->last->pos == TBL_CELL_DHORIZ)
254: c = rp->last->pos;
255: } else if (c == TBL_CELL_DOWN && rp == tbl->first_row)
1.48 schwarze 256: mandoc_msg(MANDOCERR_TBLLAYOUT_DOWN, ln, *pos, NULL);
1.11 kristaps 257:
1.1 kristaps 258: (*pos)++;
259:
260: /* Allocate cell then parse its modifiers. */
261:
1.33 schwarze 262: mods(tbl, cell_alloc(tbl, rp, c), ln, p, pos);
1.1 kristaps 263: }
264:
1.31 schwarze 265: void
1.34 schwarze 266: tbl_layout(struct tbl_node *tbl, int ln, const char *p, int pos)
1.1 kristaps 267: {
268: struct tbl_row *rp;
269:
1.30 schwarze 270: rp = NULL;
271: for (;;) {
272: /* Skip whitespace before and after each cell. */
1.1 kristaps 273:
1.32 schwarze 274: while (p[pos] == ' ' || p[pos] == '\t')
1.30 schwarze 275: pos++;
1.1 kristaps 276:
1.30 schwarze 277: switch (p[pos]) {
278: case ',': /* Next row on this input line. */
279: pos++;
280: rp = NULL;
281: continue;
282: case '\0': /* Next row on next input line. */
1.31 schwarze 283: return;
1.30 schwarze 284: case '.': /* End of layout. */
285: pos++;
286: tbl->part = TBL_PART_DATA;
1.33 schwarze 287:
288: /*
289: * When the layout is completely empty,
290: * default to one left-justified column.
291: */
292:
293: if (tbl->first_row == NULL) {
1.35 schwarze 294: tbl->first_row = tbl->last_row =
295: mandoc_calloc(1, sizeof(*rp));
296: }
297: if (tbl->first_row->first == NULL) {
1.33 schwarze 298: mandoc_msg(MANDOCERR_TBLLAYOUT_NONE,
1.48 schwarze 299: ln, pos, NULL);
1.35 schwarze 300: cell_alloc(tbl, tbl->first_row,
301: TBL_CELL_LEFT);
1.43 schwarze 302: if (tbl->opts.lvert < tbl->first_row->vert)
303: tbl->opts.lvert = tbl->first_row->vert;
1.31 schwarze 304: return;
1.33 schwarze 305: }
306:
307: /*
308: * Search for the widest line
309: * along the left and right margins.
310: */
311:
312: for (rp = tbl->first_row; rp; rp = rp->next) {
313: if (tbl->opts.lvert < rp->vert)
314: tbl->opts.lvert = rp->vert;
315: if (rp->last != NULL &&
1.37 schwarze 316: rp->last->col + 1 == tbl->opts.cols &&
1.33 schwarze 317: tbl->opts.rvert < rp->last->vert)
318: tbl->opts.rvert = rp->last->vert;
1.35 schwarze 319:
320: /* If the last line is empty, drop it. */
321:
322: if (rp->next != NULL &&
323: rp->next->first == NULL) {
324: free(rp->next);
325: rp->next = NULL;
1.39 schwarze 326: tbl->last_row = rp;
1.35 schwarze 327: }
1.33 schwarze 328: }
1.31 schwarze 329: return;
1.30 schwarze 330: default: /* Cell. */
331: break;
332: }
333:
1.35 schwarze 334: /*
335: * If the last line had at least one cell,
336: * start a new one; otherwise, continue it.
337: */
338:
339: if (rp == NULL) {
340: if (tbl->last_row == NULL ||
341: tbl->last_row->first != NULL) {
342: rp = mandoc_calloc(1, sizeof(*rp));
343: if (tbl->last_row)
344: tbl->last_row->next = rp;
345: else
346: tbl->first_row = rp;
347: tbl->last_row = rp;
348: } else
349: rp = tbl->last_row;
1.30 schwarze 350: }
1.32 schwarze 351: cell(tbl, rp, ln, p, &pos);
1.1 kristaps 352: }
353: }
1.5 kristaps 354:
355: static struct tbl_cell *
1.33 schwarze 356: cell_alloc(struct tbl_node *tbl, struct tbl_row *rp, enum tbl_cellt pos)
1.5 kristaps 357: {
358: struct tbl_cell *p, *pp;
359:
1.36 schwarze 360: p = mandoc_calloc(1, sizeof(*p));
1.44 schwarze 361: p->spacing = SIZE_MAX;
1.50 ! schwarze 362: p->font = ESCAPE_FONTROMAN;
1.37 schwarze 363: p->pos = pos;
1.5 kristaps 364:
1.36 schwarze 365: if ((pp = rp->last) != NULL) {
1.23 schwarze 366: pp->next = p;
1.37 schwarze 367: p->col = pp->col + 1;
368: } else
1.23 schwarze 369: rp->first = p;
370: rp->last = p;
1.5 kristaps 371:
1.37 schwarze 372: if (tbl->opts.cols <= p->col)
373: tbl->opts.cols = p->col + 1;
1.5 kristaps 374:
1.40 schwarze 375: return p;
1.5 kristaps 376: }
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