-/* $Id: out.c,v 1.3 2009/10/07 12:35:24 kristaps Exp $ */
+/* $Id: out.c,v 1.85 2021/10/17 21:05:54 schwarze Exp $ */
/*
- * Copyright (c) 2009 Kristaps Dzonsons <kristaps@kth.se>
+ * Copyright (c) 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
+ * Copyright (c) 2011, 2014, 2015, 2017, 2018, 2019, 2021
+ * Ingo Schwarze <schwarze@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
+#include "config.h"
+
#include <sys/types.h>
+#include <assert.h>
#include <ctype.h>
+#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include "mandoc_aux.h"
+#include "mandoc.h"
+#include "tbl.h"
#include "out.h"
+struct tbl_colgroup {
+ struct tbl_colgroup *next;
+ size_t wanted;
+ int startcol;
+ int endcol;
+};
-/*
- * Convert a `scaling unit' to a consistent form, or fail. Scaling
- * units are documented in groff.7, which stipulates the following:
- *
- * (1) A scaling unit is a signed/unsigned integer/float with or
- * without a unit.
- *
- * (2) The following units exist:
- * c Centimeter
- * i Inch
- * P Pica = 1/6 inch
- * p Point = 1/72 inch
- * m Em = the font size in points (width of letter m)
- * M 100th of an Em
- * n En = Em/2
- * u Basic unit for actual output device
- * v Vertical line space in basic units scaled point =
- * 1/sizescale of a point (defined in font DESC file)
- * f Scale by 65536.
- */
-int
-a2roffsu(const char *src, struct roffsu *dst)
-{
- char buf[BUFSIZ], *p;
- int i;
- enum roffscale unit;
+static size_t tblcalc_data(struct rofftbl *, struct roffcol *,
+ const struct tbl_opts *, const struct tbl_dat *,
+ size_t);
+static size_t tblcalc_literal(struct rofftbl *, struct roffcol *,
+ const struct tbl_dat *, size_t);
+static size_t tblcalc_number(struct rofftbl *, struct roffcol *,
+ const struct tbl_opts *, const struct tbl_dat *);
- for (p = buf, i = 0; i < BUFSIZ && isdigit((u_char)*src); i++)
- *p++ = *src++;
- if (BUFSIZ == i || (*src && *(src + 1)))
- return(0);
+/*
+ * Parse the *src string and store a scaling unit into *dst.
+ * If the string doesn't specify the unit, use the default.
+ * If no default is specified, fail.
+ * Return a pointer to the byte after the last byte used,
+ * or NULL on total failure.
+ */
+const char *
+a2roffsu(const char *src, struct roffsu *dst, enum roffscale def)
+{
+ char *endptr;
- *p = '\0';
+ dst->unit = def == SCALE_MAX ? SCALE_BU : def;
+ dst->scale = strtod(src, &endptr);
+ if (endptr == src)
+ return NULL;
- switch (*src) {
- case ('c'):
- unit = SCALE_CM;
+ switch (*endptr++) {
+ case 'c':
+ dst->unit = SCALE_CM;
break;
- case ('i'):
- unit = SCALE_IN;
+ case 'i':
+ dst->unit = SCALE_IN;
break;
- case ('P'):
- unit = SCALE_PC;
+ case 'f':
+ dst->unit = SCALE_FS;
break;
- case ('p'):
- unit = SCALE_PT;
+ case 'M':
+ dst->unit = SCALE_MM;
break;
- case ('f'):
- unit = SCALE_FS;
+ case 'm':
+ dst->unit = SCALE_EM;
break;
- case ('v'):
- unit = SCALE_VS;
+ case 'n':
+ dst->unit = SCALE_EN;
break;
- case ('m'):
- unit = SCALE_EM;
+ case 'P':
+ dst->unit = SCALE_PC;
break;
- case ('\0'):
- /* FALLTHROUGH */
- case ('u'):
- unit = SCALE_BU;
+ case 'p':
+ dst->unit = SCALE_PT;
break;
- case ('M'):
- unit = SCALE_MM;
+ case 'u':
+ dst->unit = SCALE_BU;
break;
- case ('n'):
- unit = SCALE_EN;
+ case 'v':
+ dst->unit = SCALE_VS;
break;
default:
- return(0);
+ endptr--;
+ if (SCALE_MAX == def)
+ return NULL;
+ dst->unit = def;
+ break;
}
+ return endptr;
+}
+
+/*
+ * Calculate the abstract widths and decimal positions of columns in a
+ * table. This routine allocates the columns structures then runs over
+ * all rows and cells in the table. The function pointers in "tbl" are
+ * used for the actual width calculations.
+ */
+void
+tblcalc(struct rofftbl *tbl, const struct tbl_span *sp_first,
+ size_t offset, size_t rmargin)
+{
+ struct roffsu su;
+ const struct tbl_opts *opts;
+ const struct tbl_span *sp;
+ const struct tbl_dat *dp;
+ struct roffcol *col;
+ struct tbl_colgroup *first_group, **gp, *g;
+ size_t *colwidth;
+ size_t ewidth, min1, min2, wanted, width, xwidth;
+ int done, icol, maxcol, necol, nxcol, quirkcol;
+
+ /*
+ * Allocate the master column specifiers. These will hold the
+ * widths and decimal positions for all cells in the column. It
+ * must be freed and nullified by the caller.
+ */
+
+ assert(tbl->cols == NULL);
+ tbl->cols = mandoc_calloc((size_t)sp_first->opts->cols,
+ sizeof(struct roffcol));
+ opts = sp_first->opts;
+
+ maxcol = -1;
+ first_group = NULL;
+ for (sp = sp_first; sp != NULL; sp = sp->next) {
+ if (sp->pos != TBL_SPAN_DATA)
+ continue;
+
+ /*
+ * Account for the data cells in the layout, matching it
+ * to data cells in the data section.
+ */
+
+ for (dp = sp->first; dp != NULL; dp = dp->next) {
+ icol = dp->layout->col;
+ while (maxcol < icol + dp->hspans)
+ tbl->cols[++maxcol].spacing = SIZE_MAX;
+ col = tbl->cols + icol;
+ col->flags |= dp->layout->flags;
+ if (dp->layout->flags & TBL_CELL_WIGN)
+ continue;
+
+ /* Handle explicit width specifications. */
+
+ if (dp->layout->wstr != NULL &&
+ dp->layout->width == 0 &&
+ a2roffsu(dp->layout->wstr, &su, SCALE_EN)
+ != NULL)
+ dp->layout->width =
+ (*tbl->sulen)(&su, tbl->arg);
+ if (col->width < dp->layout->width)
+ col->width = dp->layout->width;
+ if (dp->layout->spacing != SIZE_MAX &&
+ (col->spacing == SIZE_MAX ||
+ col->spacing < dp->layout->spacing))
+ col->spacing = dp->layout->spacing;
+
+ /*
+ * Calculate an automatic width.
+ * Except for spanning cells, apply it.
+ */
+
+ width = tblcalc_data(tbl,
+ dp->hspans == 0 ? col : NULL,
+ opts, dp,
+ dp->block == 0 ? 0 :
+ dp->layout->width ? dp->layout->width :
+ rmargin ? (rmargin + sp->opts->cols / 2)
+ / (sp->opts->cols + 1) : 0);
+ if (dp->hspans == 0)
+ continue;
+
+ /*
+ * Build a singly linked list
+ * of all groups of columns joined by spans,
+ * recording the minimum width for each group.
+ */
+
+ gp = &first_group;
+ while (*gp != NULL && ((*gp)->startcol != icol ||
+ (*gp)->endcol != icol + dp->hspans))
+ gp = &(*gp)->next;
+ if (*gp == NULL) {
+ g = mandoc_malloc(sizeof(*g));
+ g->next = *gp;
+ g->wanted = width;
+ g->startcol = icol;
+ g->endcol = icol + dp->hspans;
+ *gp = g;
+ } else if ((*gp)->wanted < width)
+ (*gp)->wanted = width;
+ }
+ }
+
+ /*
+ * The minimum width of columns explicitly specified
+ * in the layout is 1n.
+ */
+
+ if (maxcol < sp_first->opts->cols - 1)
+ maxcol = sp_first->opts->cols - 1;
+ for (icol = 0; icol <= maxcol; icol++) {
+ col = tbl->cols + icol;
+ if (col->width < 1)
+ col->width = 1;
+
+ /*
+ * Column spacings are needed for span width
+ * calculations, so set the default values now.
+ */
+
+ if (col->spacing == SIZE_MAX || icol == maxcol)
+ col->spacing = 3;
+ }
+
+ /*
+ * Replace the minimum widths with the missing widths,
+ * and dismiss groups that are already wide enough.
+ */
+
+ gp = &first_group;
+ while ((g = *gp) != NULL) {
+ done = 0;
+ for (icol = g->startcol; icol <= g->endcol; icol++) {
+ width = tbl->cols[icol].width;
+ if (icol < g->endcol)
+ width += tbl->cols[icol].spacing;
+ if (g->wanted <= width) {
+ done = 1;
+ break;
+ } else
+ g->wanted -= width;
+ }
+ if (done) {
+ *gp = g->next;
+ free(g);
+ } else
+ gp = &g->next;
+ }
+
+ colwidth = mandoc_reallocarray(NULL, maxcol + 1, sizeof(*colwidth));
+ while (first_group != NULL) {
+
+ /*
+ * Rebuild the array of the widths of all columns
+ * participating in spans that require expansion.
+ */
+
+ for (icol = 0; icol <= maxcol; icol++)
+ colwidth[icol] = SIZE_MAX;
+ for (g = first_group; g != NULL; g = g->next)
+ for (icol = g->startcol; icol <= g->endcol; icol++)
+ colwidth[icol] = tbl->cols[icol].width;
+
+ /*
+ * Find the smallest and second smallest column width
+ * among the columns which may need expamsion.
+ */
+
+ min1 = min2 = SIZE_MAX;
+ for (icol = 0; icol <= maxcol; icol++) {
+ width = colwidth[icol];
+ if (min1 > width) {
+ min2 = min1;
+ min1 = width;
+ } else if (min1 < width && min2 > width)
+ min2 = width;
+ }
+
+ /*
+ * Find the minimum wanted width
+ * for any one of the narrowest columns,
+ * and mark the columns wanting that width.
+ */
+
+ wanted = min2;
+ for (g = first_group; g != NULL; g = g->next) {
+ necol = 0;
+ for (icol = g->startcol; icol <= g->endcol; icol++)
+ if (colwidth[icol] == min1)
+ necol++;
+ if (necol == 0)
+ continue;
+ width = min1 + (g->wanted - 1) / necol + 1;
+ if (width > min2)
+ width = min2;
+ if (wanted > width)
+ wanted = width;
+ }
+
+ /* Record the effect of the widening. */
+
+ gp = &first_group;
+ while ((g = *gp) != NULL) {
+ done = 0;
+ for (icol = g->startcol; icol <= g->endcol; icol++) {
+ if (colwidth[icol] != min1)
+ continue;
+ if (g->wanted <= wanted - min1) {
+ tbl->cols[icol].width += g->wanted;
+ done = 1;
+ break;
+ }
+ tbl->cols[icol].width = wanted;
+ g->wanted -= wanted - min1;
+ }
+ if (done) {
+ *gp = g->next;
+ free(g);
+ } else
+ gp = &g->next;
+ }
+ }
+ free(colwidth);
+
+ /*
+ * Align numbers with text.
+ * Count columns to equalize and columns to maximize.
+ * Find maximum width of the columns to equalize.
+ * Find total width of the columns *not* to maximize.
+ */
+
+ necol = nxcol = 0;
+ ewidth = xwidth = 0;
+ for (icol = 0; icol <= maxcol; icol++) {
+ col = tbl->cols + icol;
+ if (col->width > col->nwidth)
+ col->decimal += (col->width - col->nwidth) / 2;
+ if (col->flags & TBL_CELL_EQUAL) {
+ necol++;
+ if (ewidth < col->width)
+ ewidth = col->width;
+ }
+ if (col->flags & TBL_CELL_WMAX)
+ nxcol++;
+ else
+ xwidth += col->width;
+ }
+
+ /*
+ * Equalize columns, if requested for any of them.
+ * Update total width of the columns not to maximize.
+ */
+
+ if (necol) {
+ for (icol = 0; icol <= maxcol; icol++) {
+ col = tbl->cols + icol;
+ if ( ! (col->flags & TBL_CELL_EQUAL))
+ continue;
+ if (col->width == ewidth)
+ continue;
+ if (nxcol && rmargin)
+ xwidth += ewidth - col->width;
+ col->width = ewidth;
+ }
+ }
+
+ /*
+ * If there are any columns to maximize, find the total
+ * available width, deducting 3n margins between columns.
+ * Distribute the available width evenly.
+ */
+
+ if (nxcol && rmargin) {
+ xwidth += 3*maxcol +
+ (opts->opts & (TBL_OPT_BOX | TBL_OPT_DBOX) ?
+ 2 : !!opts->lvert + !!opts->rvert);
+ if (rmargin <= offset + xwidth)
+ return;
+ xwidth = rmargin - offset - xwidth;
+
+ /*
+ * Emulate a bug in GNU tbl width calculation that
+ * manifests itself for large numbers of x-columns.
+ * Emulating it for 5 x-columns gives identical
+ * behaviour for up to 6 x-columns.
+ */
+
+ if (nxcol == 5) {
+ quirkcol = xwidth % nxcol + 2;
+ if (quirkcol != 3 && quirkcol != 4)
+ quirkcol = -1;
+ } else
+ quirkcol = -1;
+
+ necol = 0;
+ ewidth = 0;
+ for (icol = 0; icol <= maxcol; icol++) {
+ col = tbl->cols + icol;
+ if ( ! (col->flags & TBL_CELL_WMAX))
+ continue;
+ col->width = (double)xwidth * ++necol / nxcol
+ - ewidth + 0.4995;
+ if (necol == quirkcol)
+ col->width--;
+ ewidth += col->width;
+ }
+ }
+}
+
+static size_t
+tblcalc_data(struct rofftbl *tbl, struct roffcol *col,
+ const struct tbl_opts *opts, const struct tbl_dat *dp, size_t mw)
+{
+ size_t sz;
+
+ /* Branch down into data sub-types. */
+
+ switch (dp->layout->pos) {
+ case TBL_CELL_HORIZ:
+ case TBL_CELL_DHORIZ:
+ sz = (*tbl->len)(1, tbl->arg);
+ if (col != NULL && col->width < sz)
+ col->width = sz;
+ return sz;
+ case TBL_CELL_LONG:
+ case TBL_CELL_CENTRE:
+ case TBL_CELL_LEFT:
+ case TBL_CELL_RIGHT:
+ return tblcalc_literal(tbl, col, dp, mw);
+ case TBL_CELL_NUMBER:
+ return tblcalc_number(tbl, col, opts, dp);
+ case TBL_CELL_DOWN:
+ return 0;
+ default:
+ abort();
+ }
+}
+
+static size_t
+tblcalc_literal(struct rofftbl *tbl, struct roffcol *col,
+ const struct tbl_dat *dp, size_t mw)
+{
+ const char *str; /* Beginning of the first line. */
+ const char *beg; /* Beginning of the current line. */
+ char *end; /* End of the current line. */
+ size_t lsz; /* Length of the current line. */
+ size_t wsz; /* Length of the current word. */
+ size_t msz; /* Length of the longest line. */
+
+ if (dp->string == NULL || *dp->string == '\0')
+ return 0;
+ str = mw ? mandoc_strdup(dp->string) : dp->string;
+ msz = lsz = 0;
+ for (beg = str; beg != NULL && *beg != '\0'; beg = end) {
+ end = mw ? strchr(beg, ' ') : NULL;
+ if (end != NULL) {
+ *end++ = '\0';
+ while (*end == ' ')
+ end++;
+ }
+ wsz = (*tbl->slen)(beg, tbl->arg);
+ if (mw && lsz && lsz + 1 + wsz <= mw)
+ lsz += 1 + wsz;
+ else
+ lsz = wsz;
+ if (msz < lsz)
+ msz = lsz;
+ }
+ if (mw)
+ free((void *)str);
+ if (col != NULL && col->width < msz)
+ col->width = msz;
+ return msz;
+}
+
+static size_t
+tblcalc_number(struct rofftbl *tbl, struct roffcol *col,
+ const struct tbl_opts *opts, const struct tbl_dat *dp)
+{
+ const char *cp, *lastdigit, *lastpoint;
+ size_t intsz, totsz;
+ char buf[2];
+
+ if (dp->string == NULL || *dp->string == '\0')
+ return 0;
+
+ totsz = (*tbl->slen)(dp->string, tbl->arg);
+ if (col == NULL)
+ return totsz;
+
+ /*
+ * Find the last digit and
+ * the last decimal point that is adjacent to a digit.
+ * The alignment indicator "\&" overrides everything.
+ */
+
+ lastdigit = lastpoint = NULL;
+ for (cp = dp->string; cp[0] != '\0'; cp++) {
+ if (cp[0] == '\\' && cp[1] == '&') {
+ lastdigit = lastpoint = cp;
+ break;
+ } else if (cp[0] == opts->decimal &&
+ (isdigit((unsigned char)cp[1]) ||
+ (cp > dp->string && isdigit((unsigned char)cp[-1]))))
+ lastpoint = cp;
+ else if (isdigit((unsigned char)cp[0]))
+ lastdigit = cp;
+ }
+
+ /* Not a number, treat as a literal string. */
+
+ if (lastdigit == NULL) {
+ if (col != NULL && col->width < totsz)
+ col->width = totsz;
+ return totsz;
+ }
+
+ /* Measure the width of the integer part. */
+
+ if (lastpoint == NULL)
+ lastpoint = lastdigit + 1;
+ intsz = 0;
+ buf[1] = '\0';
+ for (cp = dp->string; cp < lastpoint; cp++) {
+ buf[0] = cp[0];
+ intsz += (*tbl->slen)(buf, tbl->arg);
+ }
+
+ /*
+ * If this number has more integer digits than all numbers
+ * seen on earlier lines, shift them all to the right.
+ * If it has fewer, shift this number to the right.
+ */
+
+ if (intsz > col->decimal) {
+ col->nwidth += intsz - col->decimal;
+ col->decimal = intsz;
+ } else
+ totsz += col->decimal - intsz;
+
+ /* Update the maximum total width seen so far. */
- if ((dst->scale = atoi(buf)) < 0)
- dst->scale = 0;
- dst->unit = unit;
- return(1);
+ if (totsz > col->nwidth)
+ col->nwidth = totsz;
+ if (col->nwidth > col->width)
+ col->width = col->nwidth;
+ return totsz;
}
git.ckatri.com / mandoc.git / blobdiff