Make width calculations occur within tbl_term.c, not tbl.c. This allows

for front-ends to make decisions about widths, not the back-end.

To pull this off, first make each tbl_head contain a unique index value
(0 <= index < total tbl_head elements) and remove the tbl_calc() routine
from the back-end.

Then, when encountering the first tbl_span in the front-end, dynamically
create an array of configurations (termp_tbl) keyed on each tbl_head's
unique index value.  Construct the decimals and widths at this time,
then continue parsing as before.

The termp_tbl and indexes are required because we pass a const tbl AST
into the front-end.

1 files changed, 2 insertions, 0 deletions

diff --git a/tbl_layout.c b/tbl_layout.c
index 3e3695cd..c630e3a8 100644
--- a/tbl_layout.c
+++ b/tbl_layout.c
@@ -319,6 +319,7 @@ cell_alloc(struct tbl_node *tbl, struct tbl_row *rp, enum tbl_cellt pos)
 				(TBL_CELL_VERT == p->pos ||
 				 TBL_CELL_DVERT == p->pos)) {
 			hp = mandoc_calloc(1, sizeof(struct tbl_head));
+			hp->ident = tbl->opts.cols++;
 			hp->prev = h->prev;
 			if (h->prev)
 				h->prev->next = hp;
@@ -341,6 +342,7 @@ cell_alloc(struct tbl_node *tbl, struct tbl_row *rp, enum tbl_cellt pos)
 	}
 
 	hp = mandoc_calloc(1, sizeof(struct tbl_head));
+	hp->ident = tbl->opts.cols++;
 
 	if (tbl->last_head) {
 		hp->prev = tbl->last_head;