Multiple parser and formatter fixes for line drawing in tbl(7).

* Allow mixing vertical line bars with the layout options
of the preceding layout cell.
* Correctly combine box options with layout lines.
* Correctly print vertical lines in data rows, with the right spacing.
* Correctly print cross markers and left and right ends of
horizontal lines even if vertical lines differ above and below.
* Avoid the bogus error message "no table data cells"
when a table data section starts with a horizontal line.
No increase in code size.

1 files changed, 7 insertions, 7 deletions

diff --git a/tbl_data.c b/tbl_data.c
index 33a91e86..2b889542 100644
--- a/tbl_data.c
+++ b/tbl_data.c
@@ -1,7 +1,7 @@
 /*	$Id$ */
 /*
  * Copyright (c) 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
- * Copyright (c) 2011 Ingo Schwarze <schwarze@openbsd.org>
+ * Copyright (c) 2011, 2015 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
@@ -190,15 +190,15 @@ newspan(struct tbl_node *tbl, int line, struct tbl_row *rp)
 	dp->opts = &tbl->opts;
 	dp->layout = rp;
 	dp->head = tbl->first_head;
+	dp->prev = tbl->last_span;
 
-	if (tbl->last_span) {
-		tbl->last_span->next = dp;
-		tbl->last_span = dp;
-	} else {
-		tbl->last_span = tbl->first_span = dp;
+	if (dp->prev == NULL) {
+		tbl->first_span = dp;
 		tbl->current_span = NULL;
 		dp->flags |= TBL_SPAN_FIRST;
-	}
+	} else
+		dp->prev->next = dp;
+	tbl->last_span = dp;
 
 	return(dp);
 }