X-Git-Url: https://sipb.mit.edu/gitweb.cgi/ikiwiki.git/blobdiff_plain/ee1ad53c4c2710aa7ded61bdc56f3a8cce514f22..f59d7f1e9b3851dd86acf9d46096ca8de6fad540:/IkiWiki/Plugin/smiley.pm?ds=sidebyside

diff --git a/IkiWiki/Plugin/smiley.pm b/IkiWiki/Plugin/smiley.pm
index 1a9833e6e..51b32b28f 100644
--- a/IkiWiki/Plugin/smiley.pm
+++ b/IkiWiki/Plugin/smiley.pm
@@ -9,13 +9,23 @@ my %smileys;
 my $smiley_regexp;
 
 sub import { #{{{
-	hook(type => "filter", id => "smiley", call => \&filter);
+	add_underlay("smiley");
+	hook(type => "sanitize", id => "smiley", call => \&sanitize);
 } # }}}
 
 sub build_regexp () { #{{{
 	my $list=readfile(srcfile("smileys.mdwn"));
 	while ($list =~ m/^\s*\*\s+\\([^\s]+)\s+\[\[([^]]+)\]\]/mg) {
-		$smileys{$1}=$2;
+		my $smiley=$1;
+		my $file=$2;
+
+		$smileys{$smiley}=$file;
+
+		# Add a version with < and > escaped, since they probably
+		# will be (by markdown) by the time the sanitize hook runs.
+		$smiley=~s/</&lt;/g;
+		$smiley=~s/>/&gt;/g;
+		$smileys{$smiley}=$file;
 	}
 	
 	if (! %smileys) {
@@ -31,15 +41,47 @@ sub build_regexp () { #{{{
 	#debug($smiley_regexp);
 } #}}}
 
-sub filter (@) { #{{{
+sub sanitize (@) { #{{{
 	my %params=@_;
-	
+
 	build_regexp() unless defined $smiley_regexp;
-	$params{content} =~ s{(?:^|(?<=\s))(\\?)$smiley_regexp(?:(?=\s)|$)}{
-		$1 ? $2 : htmllink($params{page}, $params{page}, $smileys{$2}, linktext => $2)
-	}egs if length $smiley_regexp;
+	
+	$_=$params{content};
+	return $_ unless length $smiley_regexp;
+	
+MATCH:	while (m{(?:^|(?<=\s|>))(\\?)$smiley_regexp(?:(?=\s|<)|$)}g) {
+		my $escape=$1;
+		my $smiley=$2;
+		my $epos=$-[1];
+		my $spos=$-[2];
+		
+		# Smilies are not allowed inside <pre> or <code>.
+		# For each tag in turn, match forward to find the next <tag>
+		# or </tag> after the smiley.
+		my $pos=pos;
+		foreach my $tag ("pre", "code") {
+			if (m/<(\/)?\s*$tag\s*>/isg && defined $1) {
+				# </tag> found first, so the smiley is
+				# inside the tag, so do not expand it.
+				next MATCH;
+			}
+			# Reset pos back to where it was before this test.
+			pos=$pos;
+		}
+
+		if ($escape) {
+			# Remove escape.
+			substr($_, $epos, 1)="";
+		}
+		else {
+			# Replace the smiley with its expanded value.
+			substr($_, $spos, length($smiley))=
+				htmllink($params{page}, $params{destpage},
+				         $smileys{$smiley}, linktext => $smiley);
+		}
+	}
 
-	return $params{content};
+	return $_;
 } # }}}
 
 1