===================================================================
RCS file: /cvs/mandoc/roff_term.c,v
retrieving revision 1.6
retrieving revision 1.8
diff -u -p -r1.6 -r1.8
--- mandoc/roff_term.c	2017/05/08 15:34:54	1.6
+++ mandoc/roff_term.c	2017/06/06 15:01:04	1.8
@@ -1,4 +1,4 @@
-/*	$OpenBSD: roff_term.c,v 1.6 2017/05/08 15:34:54 schwarze Exp $ */
+/*	$Id: roff_term.c,v 1.8 2017/06/06 15:01:04 schwarze Exp $ */
 /*
  * Copyright (c) 2010, 2014, 2015, 2017 Ingo Schwarze <schwarze@openbsd.org>
  *
@@ -28,16 +28,20 @@
 typedef	void	(*roff_term_pre_fp)(ROFF_TERM_ARGS);
 
 static	void	  roff_term_pre_br(ROFF_TERM_ARGS);
+static	void	  roff_term_pre_ce(ROFF_TERM_ARGS);
 static	void	  roff_term_pre_ft(ROFF_TERM_ARGS);
 static	void	  roff_term_pre_ll(ROFF_TERM_ARGS);
+static	void	  roff_term_pre_mc(ROFF_TERM_ARGS);
 static	void	  roff_term_pre_sp(ROFF_TERM_ARGS);
 static	void	  roff_term_pre_ta(ROFF_TERM_ARGS);
 static	void	  roff_term_pre_ti(ROFF_TERM_ARGS);
 
 static	const roff_term_pre_fp roff_term_pre_acts[ROFF_MAX] = {
 	roff_term_pre_br,  /* br */
+	roff_term_pre_ce,  /* ce */
 	roff_term_pre_ft,  /* ft */
-	roff_term_pre_ll,  /* ft */
+	roff_term_pre_ll,  /* ll */
+	roff_term_pre_mc,  /* mc */
 	roff_term_pre_sp,  /* sp */
 	roff_term_pre_ta,  /* ta */
 	roff_term_pre_ti,  /* ti */
@@ -63,6 +67,43 @@ roff_term_pre_br(ROFF_TERM_ARGS)
 }
 
 static void
+roff_term_pre_ce(ROFF_TERM_ARGS)
+{
+	const struct roff_node	*nch;
+	size_t			 len, lm;
+
+	roff_term_pre_br(p, n);
+	lm = p->offset;
+	n = n->child->next;
+	while (n != NULL) {
+		nch = n;
+		len = 0;
+		do {
+			if (n->type == ROFFT_TEXT) {
+				if (len)
+					len++;
+				len += term_strlen(p, nch->string);
+			}
+			nch = nch->next;
+		} while (nch != NULL && (n->type != ROFFT_TEXT ||
+		    (n->flags & NODE_LINE) == 0));
+		p->offset = len >= p->rmargin ? 0 :
+		    lm + len >= p->rmargin ? p->rmargin - len :
+		    (lm + p->rmargin - len) / 2;
+		while (n != nch) {
+			if (n->type == ROFFT_TEXT)
+				term_word(p, n->string);
+			else
+				roff_term_pre(p, n);
+			n = n->next;
+		}
+		p->flags |= TERMP_NOSPACE;
+		term_flushln(p);
+	}
+	p->offset = lm;
+}
+
+static void
 roff_term_pre_ft(ROFF_TERM_ARGS)
 {
 	switch (*n->child->string) {
@@ -92,6 +133,21 @@ static void
 roff_term_pre_ll(ROFF_TERM_ARGS)
 {
 	term_setwidth(p, n->child != NULL ? n->child->string : NULL);
+}
+
+static void
+roff_term_pre_mc(ROFF_TERM_ARGS)
+{
+	if (p->col) {
+		p->flags |= TERMP_NOBREAK;
+		term_flushln(p);
+		p->flags &= ~(TERMP_NOBREAK | TERMP_NOSPACE);
+	}
+	if (n->child != NULL) {
+		p->mc = n->child->string;
+		p->flags |= TERMP_NEWMC;
+	} else
+		p->flags |= TERMP_ENDMC;
 }
 
 static void