sync to OpenBSD:

save the visual cursor position in term_flushln()
and use that to avoid multiple blank lines in nested lists while
still putting subsequent empty list tags each on their own line;
"go ahead" kristaps@

3 files changed, 18 insertions, 11 deletions

diff --git a/mdoc_term.c b/mdoc_term.c
index 5247c2f9..7861e080 100644
--- a/mdoc_term.c
+++ b/mdoc_term.c
@@ -1014,14 +1014,14 @@ termp_it_post(DECL_ARGS)
 		/* FALLTHROUGH */
 	case (LIST_inset):
 		if (MDOC_BODY == n->type)
-			term_flushln(p);
+			term_newln(p);
 		break;
 	case (LIST_column):
 		if (MDOC_HEAD == n->type)
 			term_flushln(p);
 		break;
 	default:
-		term_flushln(p);
+		term_newln(p);
 		break;
 	}
 
@@ -1633,11 +1633,9 @@ termp_bd_pre(DECL_ARGS)
 	for (nn = n->child; nn; nn = nn->next) {
 		p->flags |= TERMP_NOSPACE;
 		print_mdoc_node(p, pair, m, nn);
-		if (NULL == nn->next)
-			continue;
-		if (nn->prev && nn->prev->line < nn->line)
-			term_flushln(p);
-		else if (NULL == nn->prev)
+		if (NULL == nn->prev ||
+		    nn->prev->line < nn->line ||
+		    NULL == nn->next)
 			term_flushln(p);
 	}
 	p->tabwidth = tabwidth;
@@ -1668,7 +1666,7 @@ termp_bd_post(DECL_ARGS)
 		p->rmargin = p->maxrmargin = TERM_MAXMARGIN;
 
 	p->flags |= TERMP_NOSPACE;
-	term_flushln(p);
+	term_newln(p);
 
 	p->rmargin = rm;
 	p->maxrmargin = rmax;
diff --git a/term.c b/term.c
index 471056c4..a41162c4 100644
--- a/term.c
+++ b/term.c
@@ -207,10 +207,12 @@ term_flushln(struct termp *p)
 			vend -= vis;
 			putchar('\n');
 			if (TERMP_NOBREAK & p->flags) {
+				p->viscol = p->rmargin;
 				for (j = 0; j < (int)p->rmargin; j++)
 					putchar(' ');
 				vend += p->rmargin - p->offset;
 			} else {
+				p->viscol = 0;
 				vbl = p->offset;
 			}
 
@@ -251,9 +253,11 @@ term_flushln(struct termp *p)
 			if (vbl) {
 				for (j = 0; j < (int)vbl; j++)
 					putchar(' ');
+				p->viscol += vbl;
 				vbl = 0;
 			}
 			putchar(p->buf[i]);
+			p->viscol += 1;
 		}
 		vend += vbl;
 		vis = vend;
@@ -263,6 +267,7 @@ term_flushln(struct termp *p)
 	p->overstep = 0;
 
 	if ( ! (TERMP_NOBREAK & p->flags)) {
+		p->viscol = 0;
 		putchar('\n');
 		return;
 	}
@@ -294,11 +299,13 @@ term_flushln(struct termp *p)
 
 	/* Right-pad. */
 	if (maxvis > vis + /* LINTED */
-			((TERMP_TWOSPACE & p->flags) ? 1 : 0))  
+			((TERMP_TWOSPACE & p->flags) ? 1 : 0)) {
+		p->viscol += maxvis - vis;
 		for ( ; vis < maxvis; vis++)
 			putchar(' ');
-	else {	/* ...or newline break. */
+	} else {	/* ...or newline break. */
 		putchar('\n');
+		p->viscol = p->rmargin;
 		for (i = 0; i < (int)p->rmargin; i++)
 			putchar(' ');
 	}
@@ -315,7 +322,7 @@ term_newln(struct termp *p)
 {
 
 	p->flags |= TERMP_NOSPACE;
-	if (0 == p->col) {
+	if (0 == p->col && 0 == p->viscol) {
 		p->flags &= ~TERMP_NOLPAD;
 		return;
 	}
@@ -335,6 +342,7 @@ term_vspace(struct termp *p)
 {
 
 	term_newln(p);
+	p->viscol = 0;
 	putchar('\n');
 }
 
diff --git a/term.h b/term.h
index 043178e4..0adbfd13 100644
--- a/term.h
+++ b/term.h
@@ -39,6 +39,7 @@ struct	termp {
 	size_t		  offset;	/* Margin offest. */
 	size_t		  tabwidth;	/* Distance of tab positions. */
 	size_t		  col;		/* Bytes in buf. */
+	size_t		  viscol;	/* Chars on current line. */
 	int		  overstep;	/* See termp_flushln(). */
 	int		  flags;
 #define	TERMP_SENTENCE	 (1 << 1)	/* Space before a sentence. */