Annotation of mandoc/out.c, Revision 1.73
1.73 ! schwarze 1: /* $Id: out.c,v 1.72 2018/08/18 20:18:14 schwarze Exp $ */
1.1 kristaps 2: /*
1.36 schwarze 3: * Copyright (c) 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
1.71 schwarze 4: * Copyright (c) 2011,2014,2015,2017,2018 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: */
1.12 kristaps 18: #include "config.h"
19:
1.1 kristaps 20: #include <sys/types.h>
21:
1.6 kristaps 22: #include <assert.h>
1.73 ! schwarze 23: #include <ctype.h>
1.70 schwarze 24: #include <stdint.h>
1.1 kristaps 25: #include <stdlib.h>
1.6 kristaps 26: #include <string.h>
1.7 kristaps 27: #include <time.h>
1.1 kristaps 28:
1.47 schwarze 29: #include "mandoc_aux.h"
1.30 kristaps 30: #include "mandoc.h"
1.1 kristaps 31: #include "out.h"
32:
1.30 kristaps 33: static void tblcalc_data(struct rofftbl *, struct roffcol *,
1.65 schwarze 34: const struct tbl_opts *, const struct tbl_dat *,
35: size_t);
1.30 kristaps 36: static void tblcalc_literal(struct rofftbl *, struct roffcol *,
1.65 schwarze 37: const struct tbl_dat *, size_t);
1.30 kristaps 38: static void tblcalc_number(struct rofftbl *, struct roffcol *,
1.45 schwarze 39: const struct tbl_opts *, const struct tbl_dat *);
1.30 kristaps 40:
1.48 schwarze 41:
42: /*
1.55 schwarze 43: * Parse the *src string and store a scaling unit into *dst.
44: * If the string doesn't specify the unit, use the default.
45: * If no default is specified, fail.
1.64 schwarze 46: * Return a pointer to the byte after the last byte used,
47: * or NULL on total failure.
1.3 kristaps 48: */
1.64 schwarze 49: const char *
1.5 kristaps 50: a2roffsu(const char *src, struct roffsu *dst, enum roffscale def)
1.1 kristaps 51: {
1.55 schwarze 52: char *endptr;
1.1 kristaps 53:
1.56 schwarze 54: dst->unit = def == SCALE_MAX ? SCALE_BU : def;
55: dst->scale = strtod(src, &endptr);
56: if (endptr == src)
1.64 schwarze 57: return NULL;
1.5 kristaps 58:
1.56 schwarze 59: switch (*endptr++) {
1.48 schwarze 60: case 'c':
1.56 schwarze 61: dst->unit = SCALE_CM;
1.3 kristaps 62: break;
1.48 schwarze 63: case 'i':
1.56 schwarze 64: dst->unit = SCALE_IN;
65: break;
66: case 'f':
67: dst->unit = SCALE_FS;
68: break;
69: case 'M':
70: dst->unit = SCALE_MM;
71: break;
72: case 'm':
73: dst->unit = SCALE_EM;
74: break;
75: case 'n':
76: dst->unit = SCALE_EN;
1.3 kristaps 77: break;
1.48 schwarze 78: case 'P':
1.56 schwarze 79: dst->unit = SCALE_PC;
1.3 kristaps 80: break;
1.48 schwarze 81: case 'p':
1.56 schwarze 82: dst->unit = SCALE_PT;
1.3 kristaps 83: break;
1.56 schwarze 84: case 'u':
85: dst->unit = SCALE_BU;
1.3 kristaps 86: break;
1.48 schwarze 87: case 'v':
1.56 schwarze 88: dst->unit = SCALE_VS;
1.3 kristaps 89: break;
1.68 schwarze 90: default:
1.56 schwarze 91: endptr--;
1.5 kristaps 92: if (SCALE_MAX == def)
1.64 schwarze 93: return NULL;
1.56 schwarze 94: dst->unit = def;
1.3 kristaps 95: break;
96: }
1.64 schwarze 97: return endptr;
1.8 kristaps 98: }
1.30 kristaps 99:
100: /*
101: * Calculate the abstract widths and decimal positions of columns in a
102: * table. This routine allocates the columns structures then runs over
103: * all rows and cells in the table. The function pointers in "tbl" are
104: * used for the actual width calculations.
105: */
106: void
1.52 schwarze 107: tblcalc(struct rofftbl *tbl, const struct tbl_span *sp,
1.66 schwarze 108: size_t offset, size_t rmargin)
1.30 kristaps 109: {
1.65 schwarze 110: struct roffsu su;
1.58 schwarze 111: const struct tbl_opts *opts;
1.30 kristaps 112: const struct tbl_dat *dp;
113: struct roffcol *col;
1.52 schwarze 114: size_t ewidth, xwidth;
1.43 schwarze 115: int spans;
1.58 schwarze 116: int icol, maxcol, necol, nxcol, quirkcol;
1.30 kristaps 117:
118: /*
119: * Allocate the master column specifiers. These will hold the
120: * widths and decimal positions for all cells in the column. It
121: * must be freed and nullified by the caller.
122: */
123:
124: assert(NULL == tbl->cols);
1.48 schwarze 125: tbl->cols = mandoc_calloc((size_t)sp->opts->cols,
126: sizeof(struct roffcol));
1.58 schwarze 127: opts = sp->opts;
1.30 kristaps 128:
1.53 schwarze 129: for (maxcol = -1; sp; sp = sp->next) {
1.30 kristaps 130: if (TBL_SPAN_DATA != sp->pos)
131: continue;
1.43 schwarze 132: spans = 1;
1.30 kristaps 133: /*
134: * Account for the data cells in the layout, matching it
135: * to data cells in the data section.
136: */
137: for (dp = sp->first; dp; dp = dp->next) {
1.43 schwarze 138: /* Do not used spanned cells in the calculation. */
139: if (0 < --spans)
140: continue;
141: spans = dp->spans;
142: if (1 < spans)
143: continue;
1.59 schwarze 144: icol = dp->layout->col;
1.70 schwarze 145: while (maxcol < icol)
146: tbl->cols[++maxcol].spacing = SIZE_MAX;
1.52 schwarze 147: col = tbl->cols + icol;
148: col->flags |= dp->layout->flags;
149: if (dp->layout->flags & TBL_CELL_WIGN)
150: continue;
1.65 schwarze 151: if (dp->layout->wstr != NULL &&
152: dp->layout->width == 0 &&
153: a2roffsu(dp->layout->wstr, &su, SCALE_EN)
154: != NULL)
155: dp->layout->width =
156: (*tbl->sulen)(&su, tbl->arg);
157: if (col->width < dp->layout->width)
158: col->width = dp->layout->width;
1.70 schwarze 159: if (dp->layout->spacing != SIZE_MAX &&
160: (col->spacing == SIZE_MAX ||
161: col->spacing < dp->layout->spacing))
162: col->spacing = dp->layout->spacing;
1.66 schwarze 163: tblcalc_data(tbl, col, opts, dp,
1.67 schwarze 164: dp->block == 0 ? 0 :
165: dp->layout->width ? dp->layout->width :
1.69 schwarze 166: rmargin ? (rmargin + sp->opts->cols / 2)
167: / (sp->opts->cols + 1) : 0);
1.52 schwarze 168: }
169: }
170:
171: /*
1.72 schwarze 172: * Align numbers with text.
1.52 schwarze 173: * Count columns to equalize and columns to maximize.
174: * Find maximum width of the columns to equalize.
175: * Find total width of the columns *not* to maximize.
176: */
177:
178: necol = nxcol = 0;
179: ewidth = xwidth = 0;
180: for (icol = 0; icol <= maxcol; icol++) {
181: col = tbl->cols + icol;
1.72 schwarze 182: if (col->width > col->nwidth)
183: col->decimal += (col->width - col->nwidth) / 2;
184: else
185: col->width = col->nwidth;
1.70 schwarze 186: if (col->spacing == SIZE_MAX || icol == maxcol)
187: col->spacing = 3;
1.52 schwarze 188: if (col->flags & TBL_CELL_EQUAL) {
189: necol++;
190: if (ewidth < col->width)
191: ewidth = col->width;
192: }
193: if (col->flags & TBL_CELL_WMAX)
194: nxcol++;
195: else
196: xwidth += col->width;
197: }
198:
199: /*
200: * Equalize columns, if requested for any of them.
201: * Update total width of the columns not to maximize.
202: */
203:
204: if (necol) {
205: for (icol = 0; icol <= maxcol; icol++) {
206: col = tbl->cols + icol;
207: if ( ! (col->flags & TBL_CELL_EQUAL))
208: continue;
209: if (col->width == ewidth)
210: continue;
1.66 schwarze 211: if (nxcol && rmargin)
1.52 schwarze 212: xwidth += ewidth - col->width;
213: col->width = ewidth;
214: }
215: }
216:
217: /*
218: * If there are any columns to maximize, find the total
219: * available width, deducting 3n margins between columns.
220: * Distribute the available width evenly.
221: */
222:
1.66 schwarze 223: if (nxcol && rmargin) {
1.63 schwarze 224: xwidth += 3*maxcol +
1.58 schwarze 225: (opts->opts & (TBL_OPT_BOX | TBL_OPT_DBOX) ?
226: 2 : !!opts->lvert + !!opts->rvert);
1.66 schwarze 227: if (rmargin <= offset + xwidth)
1.63 schwarze 228: return;
1.66 schwarze 229: xwidth = rmargin - offset - xwidth;
1.58 schwarze 230:
231: /*
232: * Emulate a bug in GNU tbl width calculation that
233: * manifests itself for large numbers of x-columns.
234: * Emulating it for 5 x-columns gives identical
235: * behaviour for up to 6 x-columns.
236: */
237:
238: if (nxcol == 5) {
239: quirkcol = xwidth % nxcol + 2;
240: if (quirkcol != 3 && quirkcol != 4)
241: quirkcol = -1;
242: } else
243: quirkcol = -1;
244:
245: necol = 0;
246: ewidth = 0;
1.52 schwarze 247: for (icol = 0; icol <= maxcol; icol++) {
248: col = tbl->cols + icol;
249: if ( ! (col->flags & TBL_CELL_WMAX))
250: continue;
1.58 schwarze 251: col->width = (double)xwidth * ++necol / nxcol
252: - ewidth + 0.4995;
253: if (necol == quirkcol)
254: col->width--;
255: ewidth += col->width;
1.30 kristaps 256: }
257: }
258: }
259:
260: static void
261: tblcalc_data(struct rofftbl *tbl, struct roffcol *col,
1.65 schwarze 262: const struct tbl_opts *opts, const struct tbl_dat *dp, size_t mw)
1.30 kristaps 263: {
264: size_t sz;
265:
266: /* Branch down into data sub-types. */
267:
268: switch (dp->layout->pos) {
1.48 schwarze 269: case TBL_CELL_HORIZ:
270: case TBL_CELL_DHORIZ:
1.30 kristaps 271: sz = (*tbl->len)(1, tbl->arg);
272: if (col->width < sz)
273: col->width = sz;
274: break;
1.48 schwarze 275: case TBL_CELL_LONG:
276: case TBL_CELL_CENTRE:
277: case TBL_CELL_LEFT:
278: case TBL_CELL_RIGHT:
1.65 schwarze 279: tblcalc_literal(tbl, col, dp, mw);
1.30 kristaps 280: break;
1.48 schwarze 281: case TBL_CELL_NUMBER:
1.45 schwarze 282: tblcalc_number(tbl, col, opts, dp);
1.35 kristaps 283: break;
1.48 schwarze 284: case TBL_CELL_DOWN:
1.30 kristaps 285: break;
286: default:
287: abort();
288: }
289: }
290:
291: static void
292: tblcalc_literal(struct rofftbl *tbl, struct roffcol *col,
1.65 schwarze 293: const struct tbl_dat *dp, size_t mw)
1.30 kristaps 294: {
1.65 schwarze 295: const char *str; /* Beginning of the first line. */
296: const char *beg; /* Beginning of the current line. */
297: char *end; /* End of the current line. */
1.66 schwarze 298: size_t lsz; /* Length of the current line. */
299: size_t wsz; /* Length of the current word. */
1.65 schwarze 300:
301: if (dp->string == NULL || *dp->string == '\0')
302: return;
303: str = mw ? mandoc_strdup(dp->string) : dp->string;
1.66 schwarze 304: lsz = 0;
1.65 schwarze 305: for (beg = str; beg != NULL && *beg != '\0'; beg = end) {
306: end = mw ? strchr(beg, ' ') : NULL;
307: if (end != NULL) {
308: *end++ = '\0';
309: while (*end == ' ')
310: end++;
311: }
1.66 schwarze 312: wsz = (*tbl->slen)(beg, tbl->arg);
313: if (mw && lsz && lsz + 1 + wsz <= mw)
314: lsz += 1 + wsz;
315: else
316: lsz = wsz;
317: if (col->width < lsz)
318: col->width = lsz;
1.65 schwarze 319: }
320: if (mw)
321: free((void *)str);
1.30 kristaps 322: }
323:
324: static void
325: tblcalc_number(struct rofftbl *tbl, struct roffcol *col,
1.45 schwarze 326: const struct tbl_opts *opts, const struct tbl_dat *dp)
1.30 kristaps 327: {
1.73 ! schwarze 328: const char *cp, *lastdigit, *lastpoint;
! 329: size_t intsz, totsz;
1.30 kristaps 330: char buf[2];
331:
1.73 ! schwarze 332: if (dp->string == NULL || *dp->string == '\0')
! 333: return;
! 334:
1.30 kristaps 335: /*
1.73 ! schwarze 336: * Find the last digit and
! 337: * the last decimal point that is adjacent to a digit.
! 338: * The alignment indicator "\&" overrides everything.
1.30 kristaps 339: */
340:
1.73 ! schwarze 341: lastdigit = lastpoint = NULL;
! 342: for (cp = dp->string; cp[0] != '\0'; cp++) {
! 343: if (cp[0] == '\\' && cp[1] == '&') {
! 344: lastdigit = lastpoint = cp;
! 345: break;
! 346: } else if (cp[0] == opts->decimal &&
! 347: (isdigit((unsigned char)cp[1]) ||
! 348: (cp > dp->string && isdigit((unsigned char)cp[-1]))))
! 349: lastpoint = cp;
! 350: else if (isdigit((unsigned char)cp[0]))
! 351: lastdigit = cp;
! 352: }
! 353:
! 354: /* Not a number, treat as a literal string. */
! 355:
! 356: totsz = (*tbl->slen)(dp->string, tbl->arg);
! 357: if (lastdigit == NULL) {
! 358: if (col->width < totsz)
! 359: col->width = totsz;
! 360: return;
! 361: }
1.30 kristaps 362:
1.73 ! schwarze 363: /* Measure the width of the integer part. */
1.30 kristaps 364:
1.73 ! schwarze 365: if (lastpoint == NULL)
! 366: lastpoint = lastdigit + 1;
! 367: intsz = 0;
1.30 kristaps 368: buf[1] = '\0';
1.73 ! schwarze 369: for (cp = dp->string; cp < lastpoint; cp++) {
! 370: buf[0] = cp[0];
! 371: intsz += (*tbl->slen)(buf, tbl->arg);
! 372: }
! 373:
! 374: /*
! 375: * If this number has more integer digits than all numbers
! 376: * seen on earlier lines, shift them all to the right.
! 377: * If it has fewer, shift this number to the right.
! 378: */
1.30 kristaps 379:
1.73 ! schwarze 380: if (intsz > col->decimal) {
! 381: col->nwidth += intsz - col->decimal;
! 382: col->decimal = intsz;
1.30 kristaps 383: } else
1.73 ! schwarze 384: totsz += col->decimal - intsz;
1.30 kristaps 385:
1.73 ! schwarze 386: /* Update the maximum total width seen so far. */
1.30 kristaps 387:
1.73 ! schwarze 388: if (totsz > col->nwidth)
! 389: col->nwidth = totsz;
1.30 kristaps 390: }
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