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: [PATCH] smiley: Detect smileys inside pre and tags, and do not
 expand.

---
 IkiWiki/Plugin/smiley.pm                      | 44 ++++++++++++++++---
 debian/changelog                              |  1 +
 .../RecentChanges_contains_invalid_XHTML.mdwn |  4 +-
 doc/bugs/Smileys_in_the_block_code.mdwn       |  3 ++
 ...ks_still_processed_inside_code_blocks.mdwn |  4 ++
 5 files changed, 50 insertions(+), 6 deletions(-)

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
diff --git a/debian/changelog b/debian/changelog
index ef16cbfaf..761b89471 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -55,6 +55,7 @@ ikiwiki (2.41) UNRELEASED; urgency=low
   * Store userinfo in network byte order for easy portability.
     (Old files will be automatically converted.)
   * Close meta tag for redir properly.
+  * smiley: Detect smileys inside pre and tags, and do not expand.
 
  -- martin f. krafft <madduck@debian.org>  Sun, 02 Mar 2008 17:46:38 +0100
 
diff --git a/doc/bugs/RecentChanges_contains_invalid_XHTML.mdwn b/doc/bugs/RecentChanges_contains_invalid_XHTML.mdwn
index fe5366760..f283bfa65 100644
--- a/doc/bugs/RecentChanges_contains_invalid_XHTML.mdwn
+++ b/doc/bugs/RecentChanges_contains_invalid_XHTML.mdwn
@@ -13,7 +13,7 @@ plugin which end up wrapped in a `<pre>` tag in the inline diff output.
 `<img>` tags is not allowed within a `<pre>` block.  Maybe the smiley
 plugin should be disabled on [[RecentChanges]]?
 
-> See [[Smileys_in_the_block_code]] --[[Joey]]
+> See [[Smileys_in_the_block_code]], which is now fixed. --[[Joey]]
 
 See the [validator output][validate] for more details.
 
@@ -51,4 +51,6 @@ after installing the most recent version of Text::Markdown from CPAN.
 Note that the above patch for the redirect tag is still applicable and
 the smiley issue remains open. --[[JasonBlevins]]
 
+> This bug is [[done]], all issues are fixed. --[[Joey]]
+
 [[tag patch]]
diff --git a/doc/bugs/Smileys_in_the_block_code.mdwn b/doc/bugs/Smileys_in_the_block_code.mdwn
index 08ff90789..b7854705b 100644
--- a/doc/bugs/Smileys_in_the_block_code.mdwn
+++ b/doc/bugs/Smileys_in_the_block_code.mdwn
@@ -29,3 +29,6 @@ BTW, maybe converting smileys in the block code should be disabled at all?
 > Looks similar to [[wiki_links_still_processed_inside_code_blocks]]; in both
 > cases, substitution happens in a code block, which it shouldn't.
 > --[[JoshTriplett]]
+
+> [[fixed|done]], via some super duper regexp fun to notice if the smiley
+> is inside a pre or code tag. --[[Joey]]
diff --git a/doc/bugs/wiki_links_still_processed_inside_code_blocks.mdwn b/doc/bugs/wiki_links_still_processed_inside_code_blocks.mdwn
index 744f26f4c..c4e4ba6ef 100644
--- a/doc/bugs/wiki_links_still_processed_inside_code_blocks.mdwn
+++ b/doc/bugs/wiki_links_still_processed_inside_code_blocks.mdwn
@@ -41,3 +41,7 @@ and have it render like:
 > 
 > In the case of either bug, no, I don't have an idea of a solution yet.
 > --[[Joey]]
+
+> I've now solved a similar bug involving the smiley plugin. The code used
+> there should give some strong hints how to fix this bug, though I haven't
+> tried to apply the method yet. --[[Joey]]
-- 
2.44.0