/*
* 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)
{
const struct tbl_dat *dp;
const struct tbl_head *hp;
struct roffcol *col;
/*
* 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(NULL == tbl->cols);
tbl->cols = calloc(sp->tbl->cols, sizeof(struct roffcol));
hp = sp->head;
for ( ; sp; sp = sp->next) {
if (TBL_SPAN_DATA != sp->pos)
continue;
/*
* Account for the data cells in the layout, matching it
* to data cells in the data section.
*/
for (dp = sp->first; dp; dp = dp->next) {
if (NULL == dp->layout)
continue;
col = &tbl->cols[dp->layout->head->ident];
tblcalc_data(tbl, col, sp->tbl, dp);
}
}
/*
* Calculate width of the spanners. These get one space for a
* vertical line, two for a double-vertical line.
*/
for ( ; hp; hp = hp->next) {
col = &tbl->cols[hp->ident];
switch (hp->pos) {
case (TBL_HEAD_VERT):
col->width = (*tbl->len)(1, tbl->arg);
break;
case (TBL_HEAD_DVERT):
col->width = (*tbl->len)(2, tbl->arg);
break;
default:
break;
}
}
}
/*
* 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)
{
const struct tbl_dat *dp;
const struct tbl_head *hp;
struct roffcol *col;
int spans;
/*
* 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(NULL == tbl->cols);
tbl->cols = mandoc_calloc
((size_t)sp->opts->cols, sizeof(struct roffcol));
hp = sp->head;
for ( ; sp; sp = sp->next) {
if (TBL_SPAN_DATA != sp->pos)
continue;
spans = 1;
/*
* Account for the data cells in the layout, matching it
* to data cells in the data section.
*/
for (dp = sp->first; dp; dp = dp->next) {
/* Do not used spanned cells in the calculation. */
if (0 < --spans)
continue;
spans = dp->spans;
if (1 < spans)
continue;
assert(dp->layout);
col = &tbl->cols[dp->layout->head->ident];
tblcalc_data(tbl, col, sp->opts, dp);
}
}
}
/*
* 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,
size_t totalwidth)
{
const struct tbl_opts *opts;
const struct tbl_dat *dp;
struct roffcol *col;
size_t ewidth, xwidth;
int spans;
int 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(NULL == tbl->cols);
tbl->cols = mandoc_calloc((size_t)sp->opts->cols,
sizeof(struct roffcol));
opts = sp->opts;
for (maxcol = -1; sp; sp = sp->next) {
if (TBL_SPAN_DATA != sp->pos)
continue;
spans = 1;
/*
* Account for the data cells in the layout, matching it
* to data cells in the data section.
*/
for (dp = sp->first; dp; dp = dp->next) {
/* Do not used spanned cells in the calculation. */
if (0 < --spans)
continue;
spans = dp->spans;
if (1 < spans)
continue;
icol = dp->layout->col;
if (maxcol < icol)
maxcol = icol;
col = tbl->cols + icol;
col->flags |= dp->layout->flags;
if (dp->layout->flags & TBL_CELL_WIGN)
continue;
tblcalc_data(tbl, col, opts, dp);
}
}
/*
* 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->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 && totalwidth)
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 && totalwidth) {
xwidth = totalwidth - xwidth - 3*maxcol -
(opts->opts & (TBL_OPT_BOX | TBL_OPT_DBOX) ?
2 : !!opts->lvert + !!opts->rvert);
/*
* 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;
}
}
}
