Annotation of mandoc/tbl_layout.c, Revision 1.39
1.39 ! schwarze 1: /* $Id: tbl_layout.c,v 1.38 2015/02/10 11:03:13 schwarze Exp $ */
1.1 kristaps 2: /*
1.22 schwarze 3: * Copyright (c) 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
1.32 schwarze 4: * Copyright (c) 2012, 2014, 2015 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>
23: #include <stdlib.h>
24: #include <string.h>
1.4 kristaps 25: #include <time.h>
1.1 kristaps 26:
27: #include "mandoc.h"
1.24 schwarze 28: #include "mandoc_aux.h"
1.1 kristaps 29: #include "libmandoc.h"
30: #include "libroff.h"
31:
32: struct tbl_phrase {
33: char name;
34: enum tbl_cellt key;
35: };
36:
1.32 schwarze 37: static const struct tbl_phrase keys[] = {
1.1 kristaps 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 },
1.23 schwarze 47: { '=', TBL_CELL_DHORIZ }
1.1 kristaps 48: };
49:
1.32 schwarze 50: #define KEYS_MAX ((int)(sizeof(keys)/sizeof(keys[0])))
51:
52: static void mods(struct tbl_node *, struct tbl_cell *,
1.5 kristaps 53: int, const char *, int *);
1.32 schwarze 54: static void cell(struct tbl_node *, struct tbl_row *,
1.5 kristaps 55: int, const char *, int *);
1.23 schwarze 56: static struct tbl_cell *cell_alloc(struct tbl_node *, struct tbl_row *,
1.33 schwarze 57: enum tbl_cellt);
1.1 kristaps 58:
1.26 schwarze 59:
1.32 schwarze 60: static void
1.26 schwarze 61: mods(struct tbl_node *tbl, struct tbl_cell *cp,
1.1 kristaps 62: int ln, const char *p, int *pos)
63: {
1.32 schwarze 64: char *endptr;
1.20 kristaps 65:
1.32 schwarze 66: mod:
67: while (p[*pos] == ' ' || p[*pos] == '\t')
68: (*pos)++;
1.20 kristaps 69:
1.32 schwarze 70: /* Row delimiters and cell specifiers end modifier lists. */
1.1 kristaps 71:
1.33 schwarze 72: if (strchr(".,-=^_ACLNRSaclnrs", p[*pos]) != NULL)
1.32 schwarze 73: return;
1.12 kristaps 74:
75: /* Throw away parenthesised expression. */
76:
77: if ('(' == p[*pos]) {
78: (*pos)++;
79: while (p[*pos] && ')' != p[*pos])
80: (*pos)++;
81: if (')' == p[*pos]) {
82: (*pos)++;
83: goto mod;
84: }
1.32 schwarze 85: mandoc_msg(MANDOCERR_TBLLAYOUT_PAR, tbl->parse,
1.26 schwarze 86: ln, *pos, NULL);
1.32 schwarze 87: return;
1.1 kristaps 88: }
89:
90: /* Parse numerical spacing from modifier string. */
91:
92: if (isdigit((unsigned char)p[*pos])) {
1.32 schwarze 93: cp->spacing = strtoull(p + *pos, &endptr, 10);
94: *pos = endptr - p;
1.1 kristaps 95: goto mod;
1.26 schwarze 96: }
1.1 kristaps 97:
1.13 joerg 98: switch (tolower((unsigned char)p[(*pos)++])) {
1.32 schwarze 99: case 'b':
1.38 schwarze 100: cp->flags |= TBL_CELL_BOLD;
101: goto mod;
1.32 schwarze 102: case 'd':
103: cp->flags |= TBL_CELL_BALIGN;
1.1 kristaps 104: goto mod;
1.26 schwarze 105: case 'e':
1.1 kristaps 106: cp->flags |= TBL_CELL_EQUAL;
107: goto mod;
1.32 schwarze 108: case 'f':
109: break;
1.38 schwarze 110: case 'i':
111: cp->flags |= TBL_CELL_ITALIC;
112: goto mod;
1.32 schwarze 113: case 'm':
114: mandoc_msg(MANDOCERR_TBLLAYOUT_MOD, tbl->parse,
115: ln, *pos, "m");
116: goto mod;
117: case 'p':
118: /* FALLTHROUGH */
119: case 'v':
120: if (p[*pos] == '-' || p[*pos] == '+')
121: (*pos)++;
122: while (isdigit((unsigned char)p[*pos]))
123: (*pos)++;
124: goto mod;
1.26 schwarze 125: case 't':
1.1 kristaps 126: cp->flags |= TBL_CELL_TALIGN;
127: goto mod;
1.32 schwarze 128: case 'u':
129: cp->flags |= TBL_CELL_UP;
1.10 schwarze 130: goto mod;
1.26 schwarze 131: case 'w': /* XXX for now, ignore minimal column width */
1.29 schwarze 132: goto mod;
133: case 'x':
134: cp->flags |= TBL_CELL_WMAX;
1.1 kristaps 135: goto mod;
1.32 schwarze 136: case 'z':
137: cp->flags |= TBL_CELL_WIGN;
138: goto mod;
1.33 schwarze 139: case '|':
140: if (cp->vert < 2)
141: cp->vert++;
142: else
143: mandoc_msg(MANDOCERR_TBLLAYOUT_VERT,
144: tbl->parse, ln, *pos - 1, NULL);
145: goto mod;
1.1 kristaps 146: default:
1.32 schwarze 147: mandoc_vmsg(MANDOCERR_TBLLAYOUT_CHAR, tbl->parse,
148: ln, *pos - 1, "%c", p[*pos - 1]);
149: goto mod;
1.1 kristaps 150: }
151:
1.38 schwarze 152: /* Ignore parenthised font names for now. */
153:
154: if (p[*pos] == '(')
155: goto mod;
156:
157: /* Support only one-character font-names for now. */
158:
159: if (p[*pos] == '\0' || (p[*pos + 1] != ' ' && p[*pos + 1] != '.')) {
160: mandoc_vmsg(MANDOCERR_FT_BAD, tbl->parse,
161: ln, *pos, "TS %s", p + *pos - 1);
162: if (p[*pos] != '\0')
163: (*pos)++;
164: if (p[*pos] != '\0')
165: (*pos)++;
166: goto mod;
167: }
168:
169: switch (p[(*pos)++]) {
1.26 schwarze 170: case '3':
1.21 kristaps 171: /* FALLTHROUGH */
1.38 schwarze 172: case 'B':
1.1 kristaps 173: cp->flags |= TBL_CELL_BOLD;
174: goto mod;
1.26 schwarze 175: case '2':
1.21 kristaps 176: /* FALLTHROUGH */
1.38 schwarze 177: case 'I':
1.1 kristaps 178: cp->flags |= TBL_CELL_ITALIC;
1.21 kristaps 179: goto mod;
1.26 schwarze 180: case '1':
1.21 kristaps 181: /* FALLTHROUGH */
1.38 schwarze 182: case 'R':
1.1 kristaps 183: goto mod;
184: default:
1.28 schwarze 185: mandoc_vmsg(MANDOCERR_FT_BAD, tbl->parse,
186: ln, *pos - 1, "TS f%c", p[*pos - 1]);
187: goto mod;
1.1 kristaps 188: }
189: }
190:
1.32 schwarze 191: static void
1.26 schwarze 192: cell(struct tbl_node *tbl, struct tbl_row *rp,
1.1 kristaps 193: int ln, const char *p, int *pos)
194: {
1.33 schwarze 195: int i;
1.1 kristaps 196: enum tbl_cellt c;
197:
1.33 schwarze 198: /* Handle leading vertical lines */
1.23 schwarze 199:
1.32 schwarze 200: while (p[*pos] == ' ' || p[*pos] == '\t' || p[*pos] == '|') {
201: if (p[*pos] == '|') {
1.33 schwarze 202: if (rp->vert < 2)
203: rp->vert++;
1.32 schwarze 204: else
205: mandoc_msg(MANDOCERR_TBLLAYOUT_VERT,
206: tbl->parse, ln, *pos, NULL);
207: }
1.23 schwarze 208: (*pos)++;
1.32 schwarze 209: }
1.25 schwarze 210:
1.33 schwarze 211: again:
212: while (p[*pos] == ' ' || p[*pos] == '\t')
213: (*pos)++;
1.25 schwarze 214:
1.33 schwarze 215: if (p[*pos] == '.' || p[*pos] == '\0')
1.32 schwarze 216: return;
1.23 schwarze 217:
218: /* Parse the column position (`c', `l', `r', ...). */
1.1 kristaps 219:
220: for (i = 0; i < KEYS_MAX; i++)
1.13 joerg 221: if (tolower((unsigned char)p[*pos]) == keys[i].name)
1.1 kristaps 222: break;
223:
1.32 schwarze 224: if (i == KEYS_MAX) {
225: mandoc_vmsg(MANDOCERR_TBLLAYOUT_CHAR, tbl->parse,
226: ln, *pos, "%c", p[*pos]);
227: (*pos)++;
228: goto again;
1.1 kristaps 229: }
1.11 kristaps 230: c = keys[i].key;
231:
1.32 schwarze 232: /* Special cases of spanners. */
1.16 kristaps 233:
1.32 schwarze 234: if (c == TBL_CELL_SPAN) {
235: if (rp->last == NULL)
236: mandoc_msg(MANDOCERR_TBLLAYOUT_SPAN,
237: tbl->parse, ln, *pos, NULL);
238: else if (rp->last->pos == TBL_CELL_HORIZ ||
239: rp->last->pos == TBL_CELL_DHORIZ)
240: c = rp->last->pos;
241: } else if (c == TBL_CELL_DOWN && rp == tbl->first_row)
242: mandoc_msg(MANDOCERR_TBLLAYOUT_DOWN,
243: tbl->parse, ln, *pos, NULL);
1.11 kristaps 244:
1.1 kristaps 245: (*pos)++;
246:
247: /* Allocate cell then parse its modifiers. */
248:
1.33 schwarze 249: mods(tbl, cell_alloc(tbl, rp, c), ln, p, pos);
1.1 kristaps 250: }
251:
1.31 schwarze 252: void
1.34 schwarze 253: tbl_layout(struct tbl_node *tbl, int ln, const char *p, int pos)
1.1 kristaps 254: {
255: struct tbl_row *rp;
256:
1.30 schwarze 257: rp = NULL;
258: for (;;) {
259: /* Skip whitespace before and after each cell. */
1.1 kristaps 260:
1.32 schwarze 261: while (p[pos] == ' ' || p[pos] == '\t')
1.30 schwarze 262: pos++;
1.1 kristaps 263:
1.30 schwarze 264: switch (p[pos]) {
265: case ',': /* Next row on this input line. */
266: pos++;
267: rp = NULL;
268: continue;
269: case '\0': /* Next row on next input line. */
1.31 schwarze 270: return;
1.30 schwarze 271: case '.': /* End of layout. */
272: pos++;
273: tbl->part = TBL_PART_DATA;
1.33 schwarze 274:
275: /*
276: * When the layout is completely empty,
277: * default to one left-justified column.
278: */
279:
280: if (tbl->first_row == NULL) {
1.35 schwarze 281: tbl->first_row = tbl->last_row =
282: mandoc_calloc(1, sizeof(*rp));
283: }
284: if (tbl->first_row->first == NULL) {
1.33 schwarze 285: mandoc_msg(MANDOCERR_TBLLAYOUT_NONE,
286: tbl->parse, ln, pos, NULL);
1.35 schwarze 287: cell_alloc(tbl, tbl->first_row,
288: TBL_CELL_LEFT);
1.31 schwarze 289: return;
1.33 schwarze 290: }
291:
292: /*
293: * Search for the widest line
294: * along the left and right margins.
295: */
296:
297: for (rp = tbl->first_row; rp; rp = rp->next) {
298: if (tbl->opts.lvert < rp->vert)
299: tbl->opts.lvert = rp->vert;
300: if (rp->last != NULL &&
1.37 schwarze 301: rp->last->col + 1 == tbl->opts.cols &&
1.33 schwarze 302: tbl->opts.rvert < rp->last->vert)
303: tbl->opts.rvert = rp->last->vert;
1.35 schwarze 304:
305: /* If the last line is empty, drop it. */
306:
307: if (rp->next != NULL &&
308: rp->next->first == NULL) {
309: free(rp->next);
310: rp->next = NULL;
1.39 ! schwarze 311: tbl->last_row = rp;
1.35 schwarze 312: }
1.33 schwarze 313: }
1.31 schwarze 314: return;
1.30 schwarze 315: default: /* Cell. */
316: break;
317: }
318:
1.35 schwarze 319: /*
320: * If the last line had at least one cell,
321: * start a new one; otherwise, continue it.
322: */
323:
324: if (rp == NULL) {
325: if (tbl->last_row == NULL ||
326: tbl->last_row->first != NULL) {
327: rp = mandoc_calloc(1, sizeof(*rp));
328: if (tbl->last_row)
329: tbl->last_row->next = rp;
330: else
331: tbl->first_row = rp;
332: tbl->last_row = rp;
333: } else
334: rp = tbl->last_row;
1.30 schwarze 335: }
1.32 schwarze 336: cell(tbl, rp, ln, p, &pos);
1.1 kristaps 337: }
338: }
1.5 kristaps 339:
340: static struct tbl_cell *
1.33 schwarze 341: cell_alloc(struct tbl_node *tbl, struct tbl_row *rp, enum tbl_cellt pos)
1.5 kristaps 342: {
343: struct tbl_cell *p, *pp;
344:
1.36 schwarze 345: p = mandoc_calloc(1, sizeof(*p));
1.37 schwarze 346: p->pos = pos;
1.5 kristaps 347:
1.36 schwarze 348: if ((pp = rp->last) != NULL) {
1.23 schwarze 349: pp->next = p;
1.37 schwarze 350: p->col = pp->col + 1;
351: } else
1.23 schwarze 352: rp->first = p;
353: rp->last = p;
1.5 kristaps 354:
1.37 schwarze 355: if (tbl->opts.cols <= p->col)
356: tbl->opts.cols = p->col + 1;
1.5 kristaps 357:
358: return(p);
359: }
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