Annotation of mandoc/tbl_layout.c, Revision 1.44
1.44 ! schwarze 1: /* $Id: tbl_layout.c,v 1.43 2017/06/13 16:12:01 schwarze Exp $ */
1.1 kristaps 2: /*
1.22 schwarze 3: * Copyright (c) 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
1.42 schwarze 4: * Copyright (c) 2012, 2014, 2015, 2017 Ingo Schwarze <schwarze@openbsd.org>
1.1 kristaps 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: */
1.18 kristaps 18: #include "config.h"
1.27 schwarze 19:
20: #include <sys/types.h>
1.18 kristaps 21:
1.1 kristaps 22: #include <ctype.h>
1.44 ! schwarze 23: #include <stdint.h>
1.1 kristaps 24: #include <stdlib.h>
25: #include <string.h>
1.4 kristaps 26: #include <time.h>
1.1 kristaps 27:
28: #include "mandoc.h"
1.24 schwarze 29: #include "mandoc_aux.h"
1.1 kristaps 30: #include "libmandoc.h"
31: #include "libroff.h"
32:
33: struct tbl_phrase {
34: char name;
35: enum tbl_cellt key;
36: };
37:
1.32 schwarze 38: static const struct tbl_phrase keys[] = {
1.1 kristaps 39: { 'c', TBL_CELL_CENTRE },
40: { 'r', TBL_CELL_RIGHT },
41: { 'l', TBL_CELL_LEFT },
42: { 'n', TBL_CELL_NUMBER },
43: { 's', TBL_CELL_SPAN },
44: { 'a', TBL_CELL_LONG },
45: { '^', TBL_CELL_DOWN },
46: { '-', TBL_CELL_HORIZ },
47: { '_', TBL_CELL_HORIZ },
1.23 schwarze 48: { '=', TBL_CELL_DHORIZ }
1.1 kristaps 49: };
50:
1.32 schwarze 51: #define KEYS_MAX ((int)(sizeof(keys)/sizeof(keys[0])))
52:
53: static void mods(struct tbl_node *, struct tbl_cell *,
1.5 kristaps 54: int, const char *, int *);
1.32 schwarze 55: static void cell(struct tbl_node *, struct tbl_row *,
1.5 kristaps 56: int, const char *, int *);
1.23 schwarze 57: static struct tbl_cell *cell_alloc(struct tbl_node *, struct tbl_row *,
1.33 schwarze 58: enum tbl_cellt);
1.1 kristaps 59:
1.26 schwarze 60:
1.32 schwarze 61: static void
1.26 schwarze 62: mods(struct tbl_node *tbl, struct tbl_cell *cp,
1.1 kristaps 63: int ln, const char *p, int *pos)
64: {
1.32 schwarze 65: char *endptr;
1.42 schwarze 66: size_t sz;
1.20 kristaps 67:
1.32 schwarze 68: mod:
69: while (p[*pos] == ' ' || p[*pos] == '\t')
70: (*pos)++;
1.20 kristaps 71:
1.32 schwarze 72: /* Row delimiters and cell specifiers end modifier lists. */
1.1 kristaps 73:
1.33 schwarze 74: if (strchr(".,-=^_ACLNRSaclnrs", p[*pos]) != NULL)
1.32 schwarze 75: return;
1.12 kristaps 76:
77: /* Throw away parenthesised expression. */
78:
79: if ('(' == p[*pos]) {
80: (*pos)++;
81: while (p[*pos] && ')' != p[*pos])
82: (*pos)++;
83: if (')' == p[*pos]) {
84: (*pos)++;
85: goto mod;
86: }
1.32 schwarze 87: mandoc_msg(MANDOCERR_TBLLAYOUT_PAR, tbl->parse,
1.26 schwarze 88: ln, *pos, NULL);
1.32 schwarze 89: return;
1.1 kristaps 90: }
91:
92: /* Parse numerical spacing from modifier string. */
93:
94: if (isdigit((unsigned char)p[*pos])) {
1.32 schwarze 95: cp->spacing = strtoull(p + *pos, &endptr, 10);
96: *pos = endptr - p;
1.1 kristaps 97: goto mod;
1.26 schwarze 98: }
1.1 kristaps 99:
1.13 joerg 100: switch (tolower((unsigned char)p[(*pos)++])) {
1.32 schwarze 101: case 'b':
1.38 schwarze 102: cp->flags |= TBL_CELL_BOLD;
103: goto mod;
1.32 schwarze 104: case 'd':
105: cp->flags |= TBL_CELL_BALIGN;
1.1 kristaps 106: goto mod;
1.26 schwarze 107: case 'e':
1.1 kristaps 108: cp->flags |= TBL_CELL_EQUAL;
109: goto mod;
1.32 schwarze 110: case 'f':
111: break;
1.38 schwarze 112: case 'i':
113: cp->flags |= TBL_CELL_ITALIC;
114: goto mod;
1.32 schwarze 115: case 'm':
116: mandoc_msg(MANDOCERR_TBLLAYOUT_MOD, tbl->parse,
117: ln, *pos, "m");
118: goto mod;
119: case 'p':
120: case 'v':
121: if (p[*pos] == '-' || p[*pos] == '+')
122: (*pos)++;
123: while (isdigit((unsigned char)p[*pos]))
124: (*pos)++;
125: goto mod;
1.26 schwarze 126: case 't':
1.1 kristaps 127: cp->flags |= TBL_CELL_TALIGN;
128: goto mod;
1.32 schwarze 129: case 'u':
130: cp->flags |= TBL_CELL_UP;
1.10 schwarze 131: goto mod;
1.42 schwarze 132: case 'w':
133: sz = 0;
134: if (p[*pos] == '(') {
135: (*pos)++;
136: while (p[*pos + sz] != '\0' && p[*pos + sz] != ')')
137: sz++;
138: } else
139: while (isdigit((unsigned char)p[*pos + sz]))
140: sz++;
141: if (sz) {
142: free(cp->wstr);
143: cp->wstr = mandoc_strndup(p + *pos, sz);
144: *pos += sz;
145: if (p[*pos] == ')')
146: (*pos)++;
147: }
1.29 schwarze 148: goto mod;
149: case 'x':
150: cp->flags |= TBL_CELL_WMAX;
1.1 kristaps 151: goto mod;
1.32 schwarze 152: case 'z':
153: cp->flags |= TBL_CELL_WIGN;
154: goto mod;
1.33 schwarze 155: case '|':
156: if (cp->vert < 2)
157: cp->vert++;
158: else
159: mandoc_msg(MANDOCERR_TBLLAYOUT_VERT,
160: tbl->parse, ln, *pos - 1, NULL);
161: goto mod;
1.1 kristaps 162: default:
1.32 schwarze 163: mandoc_vmsg(MANDOCERR_TBLLAYOUT_CHAR, tbl->parse,
164: ln, *pos - 1, "%c", p[*pos - 1]);
165: goto mod;
1.1 kristaps 166: }
167:
1.38 schwarze 168: /* Ignore parenthised font names for now. */
169:
170: if (p[*pos] == '(')
171: goto mod;
172:
173: /* Support only one-character font-names for now. */
174:
175: if (p[*pos] == '\0' || (p[*pos + 1] != ' ' && p[*pos + 1] != '.')) {
176: mandoc_vmsg(MANDOCERR_FT_BAD, tbl->parse,
177: ln, *pos, "TS %s", p + *pos - 1);
178: if (p[*pos] != '\0')
179: (*pos)++;
180: if (p[*pos] != '\0')
181: (*pos)++;
182: goto mod;
183: }
184:
185: switch (p[(*pos)++]) {
1.26 schwarze 186: case '3':
1.38 schwarze 187: case 'B':
1.1 kristaps 188: cp->flags |= TBL_CELL_BOLD;
189: goto mod;
1.26 schwarze 190: case '2':
1.38 schwarze 191: case 'I':
1.1 kristaps 192: cp->flags |= TBL_CELL_ITALIC;
1.21 kristaps 193: goto mod;
1.26 schwarze 194: case '1':
1.38 schwarze 195: case 'R':
1.1 kristaps 196: goto mod;
197: default:
1.28 schwarze 198: mandoc_vmsg(MANDOCERR_FT_BAD, tbl->parse,
199: ln, *pos - 1, "TS f%c", p[*pos - 1]);
200: goto mod;
1.1 kristaps 201: }
202: }
203:
1.32 schwarze 204: static void
1.26 schwarze 205: cell(struct tbl_node *tbl, struct tbl_row *rp,
1.1 kristaps 206: int ln, const char *p, int *pos)
207: {
1.33 schwarze 208: int i;
1.1 kristaps 209: enum tbl_cellt c;
210:
1.33 schwarze 211: /* Handle leading vertical lines */
1.23 schwarze 212:
1.32 schwarze 213: while (p[*pos] == ' ' || p[*pos] == '\t' || p[*pos] == '|') {
214: if (p[*pos] == '|') {
1.33 schwarze 215: if (rp->vert < 2)
216: rp->vert++;
1.32 schwarze 217: else
218: mandoc_msg(MANDOCERR_TBLLAYOUT_VERT,
219: tbl->parse, ln, *pos, NULL);
220: }
1.23 schwarze 221: (*pos)++;
1.32 schwarze 222: }
1.25 schwarze 223:
1.33 schwarze 224: again:
225: while (p[*pos] == ' ' || p[*pos] == '\t')
226: (*pos)++;
1.25 schwarze 227:
1.33 schwarze 228: if (p[*pos] == '.' || p[*pos] == '\0')
1.32 schwarze 229: return;
1.23 schwarze 230:
231: /* Parse the column position (`c', `l', `r', ...). */
1.1 kristaps 232:
233: for (i = 0; i < KEYS_MAX; i++)
1.13 joerg 234: if (tolower((unsigned char)p[*pos]) == keys[i].name)
1.1 kristaps 235: break;
236:
1.32 schwarze 237: if (i == KEYS_MAX) {
238: mandoc_vmsg(MANDOCERR_TBLLAYOUT_CHAR, tbl->parse,
239: ln, *pos, "%c", p[*pos]);
240: (*pos)++;
241: goto again;
1.1 kristaps 242: }
1.11 kristaps 243: c = keys[i].key;
244:
1.32 schwarze 245: /* Special cases of spanners. */
1.16 kristaps 246:
1.32 schwarze 247: if (c == TBL_CELL_SPAN) {
248: if (rp->last == NULL)
249: mandoc_msg(MANDOCERR_TBLLAYOUT_SPAN,
250: tbl->parse, ln, *pos, NULL);
251: else if (rp->last->pos == TBL_CELL_HORIZ ||
252: rp->last->pos == TBL_CELL_DHORIZ)
253: c = rp->last->pos;
254: } else if (c == TBL_CELL_DOWN && rp == tbl->first_row)
255: mandoc_msg(MANDOCERR_TBLLAYOUT_DOWN,
256: tbl->parse, 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,
299: tbl->parse, 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;
1.37 schwarze 362: p->pos = pos;
1.5 kristaps 363:
1.36 schwarze 364: if ((pp = rp->last) != NULL) {
1.23 schwarze 365: pp->next = p;
1.37 schwarze 366: p->col = pp->col + 1;
367: } else
1.23 schwarze 368: rp->first = p;
369: rp->last = p;
1.5 kristaps 370:
1.37 schwarze 371: if (tbl->opts.cols <= p->col)
372: tbl->opts.cols = p->col + 1;
1.5 kristaps 373:
1.40 schwarze 374: return p;
1.5 kristaps 375: }
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