From 640a3cb4e4b0817868c63e57d68bbbf3229fb254 Mon Sep 17 00:00:00 2001
From: Kristaps Dzonsons <kristaps@bsd.lv>
Date: Sat, 29 Jan 2011 14:49:44 +0000
Subject: When in a <PRE>, don't print out the <BR> before lines that have
 leading whitespace.

---
 html.h      |  5 +++--
 mdoc_html.c | 18 ++++++++++++++++--
 2 files changed, 19 insertions(+), 4 deletions(-)

diff --git a/html.h b/html.h
index e5320624..8cb83954 100644
--- a/html.h
+++ b/html.h
@@ -111,11 +111,12 @@ enum	htmltype {
 
 struct	html {
 	int		  flags;
-#define	HTML_NOSPACE	 (1 << 0)
+#define	HTML_NOSPACE	 (1 << 0) /* suppress next space */
 #define	HTML_IGNDELIM	 (1 << 1)
 #define	HTML_KEEP	 (1 << 2)
 #define	HTML_PREKEEP	 (1 << 3)
-#define	HTML_NONOSPACE	 (1 << 4)
+#define	HTML_NONOSPACE	 (1 << 4) /* never add spaces */
+#define	HTML_LITERAL	 (1 << 5) /* literal (e.g., <PRE>) context */
 	struct tagq	  tags; /* stack of open tags */
 	struct rofftbl	  tbl; /* current table */
 	struct tag	 *tblt; /* current open table scope */
diff --git a/mdoc_html.c b/mdoc_html.c
index 831580ec..11171c21 100644
--- a/mdoc_html.c
+++ b/mdoc_html.c
@@ -422,8 +422,14 @@ print_mdoc_node(MDOC_ARGS)
 	case (MDOC_TEXT):
 		/* No tables in this mode... */
 		assert(NULL == h->tblt);
+
+		/*
+		 * Make sure that if we're in a literal mode already
+		 * (i.e., within a <PRE>) don't print the newline.
+		 */
 		if (' ' == *n->string && MDOC_LINE & n->flags)
-			print_otag(h, TAG_BR, 0, NULL);
+			if ( ! (HTML_LITERAL & h->flags))
+				print_otag(h, TAG_BR, 0, NULL);
 		print_text(h, n->string);
 		return;
 	case (MDOC_TBL):
@@ -1175,7 +1181,7 @@ static int
 mdoc_bd_pre(MDOC_ARGS)
 {
 	struct htmlpair	 	 tag[2];
-	int		 	 comp;
+	int		 	 comp, sv;
 	const struct mdoc_node	*nn;
 	struct roffsu		 su;
 
@@ -1214,6 +1220,11 @@ mdoc_bd_pre(MDOC_ARGS)
 	PAIR_CLASS_INIT(&tag[1], "lit display");
 	print_otag(h, TAG_PRE, 2, tag);
 
+	/* This can be recursive: save & set our literal state. */
+
+	sv = h->flags & HTML_LITERAL;
+	h->flags |= HTML_LITERAL;
+
 	for (nn = n->child; nn; nn = nn->next) {
 		print_mdoc_node(m, nn, h);
 		/*
@@ -1250,6 +1261,9 @@ mdoc_bd_pre(MDOC_ARGS)
 		h->flags |= HTML_NOSPACE;
 	}
 
+	if (0 == sv)
+		h->flags &= ~HTML_LITERAL;
+
 	return(0);
 }
 
-- 
cgit