1 /* $Id: out.c,v 1.70 2017/06/27 18:25:02 schwarze Exp $ */
3 * Copyright (c) 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
4 * Copyright (c) 2011, 2014, 2015, 2017 Ingo Schwarze <schwarze@openbsd.org>
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.
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.
20 #include <sys/types.h>
28 #include "mandoc_aux.h"
32 static void tblcalc_data(struct rofftbl *, struct roffcol *,
33 const struct tbl_opts *, const struct tbl_dat *,
35 static void tblcalc_literal(struct rofftbl *, struct roffcol *,
36 const struct tbl_dat *, size_t);
37 static void tblcalc_number(struct rofftbl *, struct roffcol *,
38 const struct tbl_opts *, const struct tbl_dat *);
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.
45 * Return a pointer to the byte after the last byte used,
46 * or NULL on total failure.
49 a2roffsu(const char *src, struct roffsu *dst, enum roffscale def)
53 dst->unit = def == SCALE_MAX ? SCALE_BU : def;
54 dst->scale = strtod(src, &endptr);
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.
106 tblcalc(struct rofftbl *tbl, const struct tbl_span *sp,
107 size_t offset, size_t rmargin)
110 const struct tbl_opts *opts;
111 const struct tbl_dat *dp;
113 size_t ewidth, xwidth;
115 int icol, maxcol, necol, nxcol, quirkcol;
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.
123 assert(NULL == tbl->cols);
124 tbl->cols = mandoc_calloc((size_t)sp->opts->cols,
125 sizeof(struct roffcol));
128 for (maxcol = -1; sp; sp = sp->next) {
129 if (TBL_SPAN_DATA != sp->pos)
133 * Account for the data cells in the layout, matching it
134 * to data cells in the data section.
136 for (dp = sp->first; dp; dp = dp->next) {
137 /* Do not used spanned cells in the calculation. */
143 icol = dp->layout->col;
144 while (maxcol < icol)
145 tbl->cols[++maxcol].spacing = SIZE_MAX;
146 col = tbl->cols + icol;
147 col->flags |= dp->layout->flags;
148 if (dp->layout->flags & TBL_CELL_WIGN)
150 if (dp->layout->wstr != NULL &&
151 dp->layout->width == 0 &&
152 a2roffsu(dp->layout->wstr, &su, SCALE_EN)
155 (*tbl->sulen)(&su, tbl->arg);
156 if (col->width < dp->layout->width)
157 col->width = dp->layout->width;
158 if (dp->layout->spacing != SIZE_MAX &&
159 (col->spacing == SIZE_MAX ||
160 col->spacing < dp->layout->spacing))
161 col->spacing = dp->layout->spacing;
162 tblcalc_data(tbl, col, opts, dp,
164 dp->layout->width ? dp->layout->width :
165 rmargin ? (rmargin + sp->opts->cols / 2)
166 / (sp->opts->cols + 1) : 0);
171 * Count columns to equalize and columns to maximize.
172 * Find maximum width of the columns to equalize.
173 * Find total width of the columns *not* to maximize.
178 for (icol = 0; icol <= maxcol; icol++) {
179 col = tbl->cols + icol;
180 if (col->spacing == SIZE_MAX || icol == maxcol)
182 if (col->flags & TBL_CELL_EQUAL) {
184 if (ewidth < col->width)
187 if (col->flags & TBL_CELL_WMAX)
190 xwidth += col->width;
194 * Equalize columns, if requested for any of them.
195 * Update total width of the columns not to maximize.
199 for (icol = 0; icol <= maxcol; icol++) {
200 col = tbl->cols + icol;
201 if ( ! (col->flags & TBL_CELL_EQUAL))
203 if (col->width == ewidth)
205 if (nxcol && rmargin)
206 xwidth += ewidth - col->width;
212 * If there are any columns to maximize, find the total
213 * available width, deducting 3n margins between columns.
214 * Distribute the available width evenly.
217 if (nxcol && rmargin) {
219 (opts->opts & (TBL_OPT_BOX | TBL_OPT_DBOX) ?
220 2 : !!opts->lvert + !!opts->rvert);
221 if (rmargin <= offset + xwidth)
223 xwidth = rmargin - offset - xwidth;
226 * Emulate a bug in GNU tbl width calculation that
227 * manifests itself for large numbers of x-columns.
228 * Emulating it for 5 x-columns gives identical
229 * behaviour for up to 6 x-columns.
233 quirkcol = xwidth % nxcol + 2;
234 if (quirkcol != 3 && quirkcol != 4)
241 for (icol = 0; icol <= maxcol; icol++) {
242 col = tbl->cols + icol;
243 if ( ! (col->flags & TBL_CELL_WMAX))
245 col->width = (double)xwidth * ++necol / nxcol
247 if (necol == quirkcol)
249 ewidth += col->width;
255 tblcalc_data(struct rofftbl *tbl, struct roffcol *col,
256 const struct tbl_opts *opts, const struct tbl_dat *dp, size_t mw)
260 /* Branch down into data sub-types. */
262 switch (dp->layout->pos) {
264 case TBL_CELL_DHORIZ:
265 sz = (*tbl->len)(1, tbl->arg);
270 case TBL_CELL_CENTRE:
273 tblcalc_literal(tbl, col, dp, mw);
275 case TBL_CELL_NUMBER:
276 tblcalc_number(tbl, col, opts, dp);
286 tblcalc_literal(struct rofftbl *tbl, struct roffcol *col,
287 const struct tbl_dat *dp, size_t mw)
289 const char *str; /* Beginning of the first line. */
290 const char *beg; /* Beginning of the current line. */
291 char *end; /* End of the current line. */
292 size_t lsz; /* Length of the current line. */
293 size_t wsz; /* Length of the current word. */
295 if (dp->string == NULL || *dp->string == '\0')
297 str = mw ? mandoc_strdup(dp->string) : dp->string;
299 for (beg = str; beg != NULL && *beg != '\0'; beg = end) {
300 end = mw ? strchr(beg, ' ') : NULL;
306 wsz = (*tbl->slen)(beg, tbl->arg);
307 if (mw && lsz && lsz + 1 + wsz <= mw)
311 if (col->width < lsz)
319 tblcalc_number(struct rofftbl *tbl, struct roffcol *col,
320 const struct tbl_opts *opts, const struct tbl_dat *dp)
323 size_t sz, psz, ssz, d;
329 * First calculate number width and decimal place (last + 1 for
330 * non-decimal numbers). If the stored decimal is subsequent to
331 * ours, make our size longer by that difference
332 * (right-"shifting"); similarly, if ours is subsequent the
333 * stored, then extend the stored size by the difference.
334 * Finally, re-assign the stored values.
337 str = dp->string ? dp->string : "";
338 sz = (*tbl->slen)(str, tbl->arg);
340 /* FIXME: TBL_DATA_HORIZ et al.? */
342 buf[0] = opts->decimal;
345 psz = (*tbl->slen)(buf, tbl->arg);
347 if (NULL != (cp = strrchr(str, opts->decimal))) {
349 for (ssz = 0, i = 0; cp != &str[i]; i++) {
351 ssz += (*tbl->slen)(buf, tbl->arg);
357 /* Adjust the settings for this column. */
359 if (col->decimal > d) {
360 sz += col->decimal - d;
363 col->width += d - col->decimal;
367 if (d > col->decimal)