Fri May 13 20:33:53 BST 2005  Adam Spiers <twiki@adamspiers.org>
  * auto-render image attachments even if they're relative URLs
  http://twiki.org/cgi-bin/view/Codev/RelativeURLs
diff -rN -u old-twiki-20040902-dev/lib/TWiki/Render.pm new-twiki-20040902-dev/lib/TWiki/Render.pm
--- old-twiki-20040902-dev/lib/TWiki/Render.pm	2005-06-01 14:24:24.000000000 +0100
+++ new-twiki-20040902-dev/lib/TWiki/Render.pm	2005-06-01 14:24:41.000000000 +0100
@@ -729,14 +729,14 @@
 
 ---++ sub externalLink (  $pre, $url  )
 
-Not yet documented.
+FIXME - what on earth is the point of the C<$pre> here?
 
 =cut
 
 sub externalLink
 {
     my( $pre, $url ) = @_;
-    if( $url =~ /\.(gif|jpg|jpeg|png)$/i ) {
+    if( $url =~ /$regex{imageSuffixRegex}$/ ) {
         my $filename = $url;
         $filename =~ s@.*/([^/]*)@$1@go;
         return "$pre<img src=\"$url\" alt=\"$filename\" />";
@@ -995,6 +995,11 @@
 # Handle embedded URLs
             s!(^|[\-\*\s\(])($regex{linkProtocolPattern}\:([^\s\<\>\"]+[^\s\.\,\!\?\;\:\)\<]))!&externalLink($1,$2)!geo;
 
+# Adam Spiers <twiki@adamspiers.org>
+# Auto-render images even when URL are relative; see
+# http://twiki.org/cgi-bin/view/Codev/RelativeURLs
+            s~(?:^|\s)($TWiki::pubUrlPath/$regex{webNameRegex}/$regex{filenameRegex}/[^/]+$regex{imageSuffixRegex})~&externalLink('', $1)~ge;
+
 # Entities
             s/&(\w+?)\;/$TranslationToken$1\;/g;      # "&abc;"
             s/&(\#[0-9]+)\;/$TranslationToken$1\;/g;  # "&#123;"
diff -rN -u old-twiki-20040902-dev/lib/TWiki.pm new-twiki-20040902-dev/lib/TWiki.pm
--- old-twiki-20040902-dev/lib/TWiki.pm	2005-06-01 14:24:24.000000000 +0100
+++ new-twiki-20040902-dev/lib/TWiki.pm	2005-06-01 14:24:43.000000000 +0100
@@ -628,6 +628,8 @@
     # Filename regex, for attachments
     $regex{filenameRegex} = qr/[$regex{mixedAlphaNum}\.]+/;
 
+    $regex{imageSuffixRegex} = qr/\.(gif|jpg|jpeg|png)/i;
+
     # Single-character alpha-based regexes
     $regex{singleUpperAlphaRegex} = qr/[$regex{upperAlpha}]/;
     $regex{singleLowerAlphaRegex} = qr/[$regex{lowerAlpha}]/;