From 44824dba1bc9e03499e91f15234764e8739fcff8 Mon Sep 17 00:00:00 2001
From: Joey Hess <joey@kodama.kitenet.net>
Date: Fri, 21 Mar 2008 02:43:20 -0400
Subject: smiley: Detect smileys inside pre and tags, and do not expand.

---
 IkiWiki/Plugin/smiley.pm | 44 +++++++++++++++++++++++++++++++++++++++-----
 1 file changed, 39 insertions(+), 5 deletions(-)

(limited to 'IkiWiki/Plugin')

diff --git a/IkiWiki/Plugin/smiley.pm b/IkiWiki/Plugin/smiley.pm
index 932c2c4fe..7e0b54499 100644
--- a/IkiWiki/Plugin/smiley.pm
+++ b/IkiWiki/Plugin/smiley.pm
@@ -34,13 +34,47 @@ sub build_regexp () { #{{{
 
 sub filter (@) { #{{{
 	my %params=@_;
-	
+
 	build_regexp() unless defined $smiley_regexp;
-	$params{content} =~ s{(?:^|(?<=\s))(\\?)$smiley_regexp(?:(?=\s)|$)}{
-		$1 ? $2 : htmllink($params{page}, $params{destpage}, $smileys{$2}, linktext => $2)
-	}egs if length $smiley_regexp;
+	
+	$_=$params{content};
+	return $_ unless length $smiley_regexp;
+	
+MATCH:	while (m{(?:^|(?<=\s))(\\?)$smiley_regexp(?:(?=\s)|$)}g) {
+		# Smilies are not allowed inside <pre> or <code>.
+		# For each tag in turn, match forward to find <tag> or
+		# </tag>. If it's </tag>, then the smiley is inside the
+		# tag, and is not expanded. If it's <tag>, the smiley is
+		# outside the block.
+		my $pos=pos;
+		foreach my $tag ("pre", "code") {
+			if (m/.*?<(\/)?\s*$tag\s*>/isg) {
+				if (defined $1) {
+					# Inside tag, so do nothing.
+					# (Smiley hunting will continue after
+					# the tag.)
+					next MATCH;
+				}
+				else {
+					# Reset pos back to where it was before
+					# this test.
+					pos=$pos;
+				}
+			}
+		}
+
+		if ($1) {
+			# Remove escape.
+			substr($_, $-[1], 1)="";
+		}
+		else {
+			# Replace the smiley with its expanded value.
+			substr($_, $-[2], length($2))=
+				htmllink($params{page}, $params{destpage}, $smileys{$2}, linktext => $2);
+		}
+	}
 
-	return $params{content};
+	return $_;
 } # }}}
 
 1
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