From 4529325a8a141549d437f69180f87d8e684a0235 Mon Sep 17 00:00:00 2001
From: schwarze <schwarze@openbsd.org>
Date: Tue, 30 Mar 2021 19:23:50 +0000
Subject: [PATCH] In HTML output, correctly render .Bd -unfilled in
 proportionally-spaced font, rather than with the monospace font appropriate
 for .Bd -literal. This fixes a minibug reported by anton@.

Implemented by no longer relying on the typical browser default of
"pre { font-family: monospace }" but instead letting <pre> elements
inherit the font family from their parent, then adding an explicit CSS .Li
class only for those displays where the manual page author requested it
by using the -literal option on the .Bd macro.
---
 regress/usr.bin/mandoc/mdoc/Bd/paragraph.out_html | 2 +-
 usr.bin/mandoc/mandoc.css                         | 3 ++-
 usr.bin/mandoc/mdoc_html.c                        | 9 ++++++---
 3 files changed, 9 insertions(+), 5 deletions(-)

diff --git a/regress/usr.bin/mandoc/mdoc/Bd/paragraph.out_html b/regress/usr.bin/mandoc/mdoc/Bd/paragraph.out_html
index 22355ed1e2b..df5fc6d6062 100644
--- a/regress/usr.bin/mandoc/mdoc/Bd/paragraph.out_html
+++ b/regress/usr.bin/mandoc/mdoc/Bd/paragraph.out_html
@@ -7,7 +7,7 @@
 </div>
 back to normal
 <p class="Pp">another paragraph</p>
-<div class="Bd Pp" id="unfilled">
+<div class="Bd Pp Li" id="unfilled">
 <pre><a class="permalink" href="#unfilled">unfilled</a> literal
 display
 <mark id="upara"></mark>
diff --git a/usr.bin/mandoc/mandoc.css b/usr.bin/mandoc/mandoc.css
index ca7f2602e58..2b19ba68596 100644
--- a/usr.bin/mandoc/mandoc.css
+++ b/usr.bin/mandoc/mandoc.css
@@ -1,4 +1,4 @@
-/* $OpenBSD: mandoc.css,v 1.34 2020/10/30 21:31:19 schwarze Exp $ */
+/* $OpenBSD: mandoc.css,v 1.35 2021/03/30 19:23:50 schwarze Exp $ */
 /*
  * Standard style sheet for mandoc(1) -Thtml and man.cgi(8).
  *
@@ -31,6 +31,7 @@ td {		vertical-align: top;
 ul, ol, dl {	margin-top: 0em;
 		margin-bottom: 0em; }
 li, dt {	margin-top: 1em; }
+pre {		font-family: inherit; }
 
 .permalink {	border-bottom: thin dotted;
 		color: inherit;
diff --git a/usr.bin/mandoc/mdoc_html.c b/usr.bin/mandoc/mdoc_html.c
index b5442dfd9b4..e6dbfbe4a83 100644
--- a/usr.bin/mandoc/mdoc_html.c
+++ b/usr.bin/mandoc/mdoc_html.c
@@ -1,6 +1,6 @@
-/* $OpenBSD: mdoc_html.c,v 1.216 2020/10/16 17:22:39 schwarze Exp $ */
+/* $OpenBSD: mdoc_html.c,v 1.217 2021/03/30 19:23:50 schwarze Exp $ */
 /*
- * Copyright (c) 2014-2020 Ingo Schwarze <schwarze@openbsd.org>
+ * Copyright (c) 2014-2021 Ingo Schwarze <schwarze@openbsd.org>
  * Copyright (c) 2008-2011, 2014 Kristaps Dzonsons <kristaps@bsd.lv>
  *
  * Permission to use, copy, modify, and distribute this software for any
@@ -928,7 +928,7 @@ mdoc_sx_pre(MDOC_ARGS)
 static int
 mdoc_bd_pre(MDOC_ARGS)
 {
-	char			 buf[16];
+	char			 buf[20];
 	struct roff_node	*nn;
 	int			 comp;
 
@@ -965,6 +965,9 @@ mdoc_bd_pre(MDOC_ARGS)
 	    strcmp(n->norm->Bd.offs, "left") != 0)
 		(void)strlcat(buf, " Bd-indent", sizeof(buf));
 
+	if (n->norm->Bd.type == DISP_literal)
+		(void)strlcat(buf, " Li", sizeof(buf));
+
 	print_otag_id(h, TAG_DIV, buf, n);
 	return 1;
 }
-- 
2.20.1