Annotation of mandoc/out.c, Revision 1.72
1.72 ! schwarze 1: /* $Id: out.c,v 1.71 2018/08/18 16:44:55 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>
1.70 schwarze 23: #include <stdint.h>
1.1 kristaps 24: #include <stdlib.h>
1.6 kristaps 25: #include <string.h>
1.7 kristaps 26: #include <time.h>
1.1 kristaps 27:
1.47 schwarze 28: #include "mandoc_aux.h"
1.30 kristaps 29: #include "mandoc.h"
1.1 kristaps 30: #include "out.h"
31:
1.30 kristaps 32: static void tblcalc_data(struct rofftbl *, struct roffcol *,
1.65 schwarze 33: const struct tbl_opts *, const struct tbl_dat *,
34: size_t);
1.30 kristaps 35: static void tblcalc_literal(struct rofftbl *, struct roffcol *,
1.65 schwarze 36: const struct tbl_dat *, size_t);
1.30 kristaps 37: static void tblcalc_number(struct rofftbl *, struct roffcol *,
1.45 schwarze 38: const struct tbl_opts *, const struct tbl_dat *);
1.30 kristaps 39:
1.48 schwarze 40:
41: /*
1.55 schwarze 42: * Parse the *src string and store a scaling unit into *dst.
43: * If the string doesn't specify the unit, use the default.
44: * If no default is specified, fail.
1.64 schwarze 45: * Return a pointer to the byte after the last byte used,
46: * or NULL on total failure.
1.3 kristaps 47: */
1.64 schwarze 48: const char *
1.5 kristaps 49: a2roffsu(const char *src, struct roffsu *dst, enum roffscale def)
1.1 kristaps 50: {
1.55 schwarze 51: char *endptr;
1.1 kristaps 52:
1.56 schwarze 53: dst->unit = def == SCALE_MAX ? SCALE_BU : def;
54: dst->scale = strtod(src, &endptr);
55: if (endptr == src)
1.64 schwarze 56: return NULL;
1.5 kristaps 57:
1.56 schwarze 58: switch (*endptr++) {
1.48 schwarze 59: case 'c':
1.56 schwarze 60: dst->unit = SCALE_CM;
1.3 kristaps 61: break;
1.48 schwarze 62: case 'i':
1.56 schwarze 63: dst->unit = SCALE_IN;
64: break;
65: case 'f':
66: dst->unit = SCALE_FS;
67: break;
68: case 'M':
69: dst->unit = SCALE_MM;
70: break;
71: case 'm':
72: dst->unit = SCALE_EM;
73: break;
74: case 'n':
75: dst->unit = SCALE_EN;
1.3 kristaps 76: break;
1.48 schwarze 77: case 'P':
1.56 schwarze 78: dst->unit = SCALE_PC;
1.3 kristaps 79: break;
1.48 schwarze 80: case 'p':
1.56 schwarze 81: dst->unit = SCALE_PT;
1.3 kristaps 82: break;
1.56 schwarze 83: case 'u':
84: dst->unit = SCALE_BU;
1.3 kristaps 85: break;
1.48 schwarze 86: case 'v':
1.56 schwarze 87: dst->unit = SCALE_VS;
1.3 kristaps 88: break;
1.68 schwarze 89: default:
1.56 schwarze 90: endptr--;
1.5 kristaps 91: if (SCALE_MAX == def)
1.64 schwarze 92: return NULL;
1.56 schwarze 93: dst->unit = def;
1.3 kristaps 94: break;
95: }
1.64 schwarze 96: return endptr;
1.8 kristaps 97: }
1.30 kristaps 98:
99: /*
100: * Calculate the abstract widths and decimal positions of columns in a
101: * table. This routine allocates the columns structures then runs over
102: * all rows and cells in the table. The function pointers in "tbl" are
103: * used for the actual width calculations.
104: */
105: void
1.52 schwarze 106: tblcalc(struct rofftbl *tbl, const struct tbl_span *sp,
1.66 schwarze 107: size_t offset, size_t rmargin)
1.30 kristaps 108: {
1.65 schwarze 109: struct roffsu su;
1.58 schwarze 110: const struct tbl_opts *opts;
1.30 kristaps 111: const struct tbl_dat *dp;
112: struct roffcol *col;
1.52 schwarze 113: size_t ewidth, xwidth;
1.43 schwarze 114: int spans;
1.58 schwarze 115: int icol, maxcol, necol, nxcol, quirkcol;
1.30 kristaps 116:
117: /*
118: * Allocate the master column specifiers. These will hold the
119: * widths and decimal positions for all cells in the column. It
120: * must be freed and nullified by the caller.
121: */
122:
123: assert(NULL == tbl->cols);
1.48 schwarze 124: tbl->cols = mandoc_calloc((size_t)sp->opts->cols,
125: sizeof(struct roffcol));
1.58 schwarze 126: opts = sp->opts;
1.30 kristaps 127:
1.53 schwarze 128: for (maxcol = -1; sp; sp = sp->next) {
1.30 kristaps 129: if (TBL_SPAN_DATA != sp->pos)
130: continue;
1.43 schwarze 131: spans = 1;
1.30 kristaps 132: /*
133: * Account for the data cells in the layout, matching it
134: * to data cells in the data section.
135: */
136: for (dp = sp->first; dp; dp = dp->next) {
1.43 schwarze 137: /* Do not used spanned cells in the calculation. */
138: if (0 < --spans)
139: continue;
140: spans = dp->spans;
141: if (1 < spans)
142: continue;
1.59 schwarze 143: icol = dp->layout->col;
1.70 schwarze 144: while (maxcol < icol)
145: tbl->cols[++maxcol].spacing = SIZE_MAX;
1.52 schwarze 146: col = tbl->cols + icol;
147: col->flags |= dp->layout->flags;
148: if (dp->layout->flags & TBL_CELL_WIGN)
149: continue;
1.65 schwarze 150: if (dp->layout->wstr != NULL &&
151: dp->layout->width == 0 &&
152: a2roffsu(dp->layout->wstr, &su, SCALE_EN)
153: != NULL)
154: dp->layout->width =
155: (*tbl->sulen)(&su, tbl->arg);
156: if (col->width < dp->layout->width)
157: col->width = dp->layout->width;
1.70 schwarze 158: if (dp->layout->spacing != SIZE_MAX &&
159: (col->spacing == SIZE_MAX ||
160: col->spacing < dp->layout->spacing))
161: col->spacing = dp->layout->spacing;
1.66 schwarze 162: tblcalc_data(tbl, col, opts, dp,
1.67 schwarze 163: dp->block == 0 ? 0 :
164: dp->layout->width ? dp->layout->width :
1.69 schwarze 165: rmargin ? (rmargin + sp->opts->cols / 2)
166: / (sp->opts->cols + 1) : 0);
1.52 schwarze 167: }
168: }
169:
170: /*
1.72 ! schwarze 171: * Align numbers with text.
1.52 schwarze 172: * Count columns to equalize and columns to maximize.
173: * Find maximum width of the columns to equalize.
174: * Find total width of the columns *not* to maximize.
175: */
176:
177: necol = nxcol = 0;
178: ewidth = xwidth = 0;
179: for (icol = 0; icol <= maxcol; icol++) {
180: col = tbl->cols + icol;
1.72 ! schwarze 181: if (col->width > col->nwidth)
! 182: col->decimal += (col->width - col->nwidth) / 2;
! 183: else
! 184: col->width = col->nwidth;
1.70 schwarze 185: if (col->spacing == SIZE_MAX || icol == maxcol)
186: col->spacing = 3;
1.52 schwarze 187: if (col->flags & TBL_CELL_EQUAL) {
188: necol++;
189: if (ewidth < col->width)
190: ewidth = col->width;
191: }
192: if (col->flags & TBL_CELL_WMAX)
193: nxcol++;
194: else
195: xwidth += col->width;
196: }
197:
198: /*
199: * Equalize columns, if requested for any of them.
200: * Update total width of the columns not to maximize.
201: */
202:
203: if (necol) {
204: for (icol = 0; icol <= maxcol; icol++) {
205: col = tbl->cols + icol;
206: if ( ! (col->flags & TBL_CELL_EQUAL))
207: continue;
208: if (col->width == ewidth)
209: continue;
1.66 schwarze 210: if (nxcol && rmargin)
1.52 schwarze 211: xwidth += ewidth - col->width;
212: col->width = ewidth;
213: }
214: }
215:
216: /*
217: * If there are any columns to maximize, find the total
218: * available width, deducting 3n margins between columns.
219: * Distribute the available width evenly.
220: */
221:
1.66 schwarze 222: if (nxcol && rmargin) {
1.63 schwarze 223: xwidth += 3*maxcol +
1.58 schwarze 224: (opts->opts & (TBL_OPT_BOX | TBL_OPT_DBOX) ?
225: 2 : !!opts->lvert + !!opts->rvert);
1.66 schwarze 226: if (rmargin <= offset + xwidth)
1.63 schwarze 227: return;
1.66 schwarze 228: xwidth = rmargin - offset - xwidth;
1.58 schwarze 229:
230: /*
231: * Emulate a bug in GNU tbl width calculation that
232: * manifests itself for large numbers of x-columns.
233: * Emulating it for 5 x-columns gives identical
234: * behaviour for up to 6 x-columns.
235: */
236:
237: if (nxcol == 5) {
238: quirkcol = xwidth % nxcol + 2;
239: if (quirkcol != 3 && quirkcol != 4)
240: quirkcol = -1;
241: } else
242: quirkcol = -1;
243:
244: necol = 0;
245: ewidth = 0;
1.52 schwarze 246: for (icol = 0; icol <= maxcol; icol++) {
247: col = tbl->cols + icol;
248: if ( ! (col->flags & TBL_CELL_WMAX))
249: continue;
1.58 schwarze 250: col->width = (double)xwidth * ++necol / nxcol
251: - ewidth + 0.4995;
252: if (necol == quirkcol)
253: col->width--;
254: ewidth += col->width;
1.30 kristaps 255: }
256: }
257: }
258:
259: static void
260: tblcalc_data(struct rofftbl *tbl, struct roffcol *col,
1.65 schwarze 261: const struct tbl_opts *opts, const struct tbl_dat *dp, size_t mw)
1.30 kristaps 262: {
263: size_t sz;
264:
265: /* Branch down into data sub-types. */
266:
267: switch (dp->layout->pos) {
1.48 schwarze 268: case TBL_CELL_HORIZ:
269: case TBL_CELL_DHORIZ:
1.30 kristaps 270: sz = (*tbl->len)(1, tbl->arg);
271: if (col->width < sz)
272: col->width = sz;
273: break;
1.48 schwarze 274: case TBL_CELL_LONG:
275: case TBL_CELL_CENTRE:
276: case TBL_CELL_LEFT:
277: case TBL_CELL_RIGHT:
1.65 schwarze 278: tblcalc_literal(tbl, col, dp, mw);
1.30 kristaps 279: break;
1.48 schwarze 280: case TBL_CELL_NUMBER:
1.45 schwarze 281: tblcalc_number(tbl, col, opts, dp);
1.35 kristaps 282: break;
1.48 schwarze 283: case TBL_CELL_DOWN:
1.30 kristaps 284: break;
285: default:
286: abort();
287: }
288: }
289:
290: static void
291: tblcalc_literal(struct rofftbl *tbl, struct roffcol *col,
1.65 schwarze 292: const struct tbl_dat *dp, size_t mw)
1.30 kristaps 293: {
1.65 schwarze 294: const char *str; /* Beginning of the first line. */
295: const char *beg; /* Beginning of the current line. */
296: char *end; /* End of the current line. */
1.66 schwarze 297: size_t lsz; /* Length of the current line. */
298: size_t wsz; /* Length of the current word. */
1.65 schwarze 299:
300: if (dp->string == NULL || *dp->string == '\0')
301: return;
302: str = mw ? mandoc_strdup(dp->string) : dp->string;
1.66 schwarze 303: lsz = 0;
1.65 schwarze 304: for (beg = str; beg != NULL && *beg != '\0'; beg = end) {
305: end = mw ? strchr(beg, ' ') : NULL;
306: if (end != NULL) {
307: *end++ = '\0';
308: while (*end == ' ')
309: end++;
310: }
1.66 schwarze 311: wsz = (*tbl->slen)(beg, tbl->arg);
312: if (mw && lsz && lsz + 1 + wsz <= mw)
313: lsz += 1 + wsz;
314: else
315: lsz = wsz;
316: if (col->width < lsz)
317: col->width = lsz;
1.65 schwarze 318: }
319: if (mw)
320: free((void *)str);
1.30 kristaps 321: }
322:
323: static void
324: tblcalc_number(struct rofftbl *tbl, struct roffcol *col,
1.45 schwarze 325: const struct tbl_opts *opts, const struct tbl_dat *dp)
1.30 kristaps 326: {
1.48 schwarze 327: int i;
1.71 schwarze 328: size_t sz, ssz, d;
1.34 kristaps 329: const char *str;
1.30 kristaps 330: char *cp;
331: char buf[2];
332:
333: /*
334: * First calculate number width and decimal place (last + 1 for
1.43 schwarze 335: * non-decimal numbers). If the stored decimal is subsequent to
1.30 kristaps 336: * ours, make our size longer by that difference
337: * (right-"shifting"); similarly, if ours is subsequent the
338: * stored, then extend the stored size by the difference.
339: * Finally, re-assign the stored values.
340: */
341:
1.34 kristaps 342: str = dp->string ? dp->string : "";
343: sz = (*tbl->slen)(str, tbl->arg);
1.30 kristaps 344:
1.34 kristaps 345: /* FIXME: TBL_DATA_HORIZ et al.? */
1.30 kristaps 346:
1.45 schwarze 347: buf[0] = opts->decimal;
1.30 kristaps 348: buf[1] = '\0';
349:
1.45 schwarze 350: if (NULL != (cp = strrchr(str, opts->decimal))) {
1.30 kristaps 351: buf[1] = '\0';
352: for (ssz = 0, i = 0; cp != &str[i]; i++) {
353: buf[0] = str[i];
354: ssz += (*tbl->slen)(buf, tbl->arg);
355: }
1.71 schwarze 356: d = ssz;
1.30 kristaps 357: } else
1.71 schwarze 358: d = sz;
1.30 kristaps 359:
360: /* Adjust the settings for this column. */
361:
362: if (col->decimal > d) {
363: sz += col->decimal - d;
364: d = col->decimal;
365: } else
1.72 ! schwarze 366: col->nwidth += d - col->decimal;
1.30 kristaps 367:
1.72 ! schwarze 368: if (sz > col->nwidth)
! 369: col->nwidth = sz;
1.30 kristaps 370: if (d > col->decimal)
371: col->decimal = d;
372: }
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