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[git.ikiwiki.info.git] / IkiWiki / Plugin / link.pm

diff --git a/IkiWiki/Plugin/link.pm b/IkiWiki/Plugin/link.pm
index 3838aec09708450d8d3f9ba338b3cb3b09ee6892..f6c3573f75f5508dc810464162e9fb9a1ad8f527 100644 (file)
--- a/IkiWiki/Plugin/link.pm
+++ b/IkiWiki/Plugin/link.pm
@@ -7,6 +7,9 @@ use IkiWiki 3.00;
 
 my $link_regexp;
 
+my $email_regexp = qr/^.+@.+$/;
+my $url_regexp = qr/^(?:[^:]+:\/\/|mailto:).*/i;
+
 sub import {
        hook(type => "getsetup", id => "link", call => \&getsetup);
        hook(type => "checkconfig", id => "link", call => \&checkconfig);
@@ -57,10 +60,56 @@ sub checkconfig () {
                        )?                      # optional
 
                        \]\]                    # end of link
-               }x,
+               }x;
        }
 }
 
+sub is_externallink ($$;$$) {
+       my $page = shift;
+       my $url = shift;
+       my $anchor = shift;
+       my $force = shift;
+       
+       if (defined $anchor) {
+               $url.="#".$anchor;
+       }
+
+       if (! $force && $url =~ /$email_regexp/) {
+               # url looks like an email address, so we assume it
+               # is supposed to be an external link if there is no
+               # page with that name.
+               return (! (bestlink($page, linkpage($url))))
+       }
+
+       return ($url =~ /$url_regexp/)
+}
+
+sub externallink ($$;$) {
+       my $url = shift;
+       my $anchor = shift;
+       my $pagetitle = shift;
+
+       if (defined $anchor) {
+               $url.="#".$anchor;
+       }
+
+       # build pagetitle
+       if (! $pagetitle) {
+               $pagetitle = $url;
+               # use only the email address as title for mailto: urls
+               if ($pagetitle =~ /^mailto:.*/) {
+                       $pagetitle =~ s/^mailto:([^?]+).*/$1/;
+               }
+       }
+
+       if ($url !~ /$url_regexp/) {
+               # handle email addresses (without mailto:)
+               $url = "mailto:" . $url;
+       }
+
+       return "<a href=\"$url\">$pagetitle</a>";
+}
+
 sub linkify (@) {
        my %params=@_;
        my $page=$params{page};
@@ -69,13 +118,17 @@ sub linkify (@) {
        $params{content} =~ s{(\\?)$link_regexp}{
                defined $2
                        ? ( $1 
-                               ? "[[$2|$3".($4 ? "#$4" : "")."]]" 
-                               : htmllink($page, $destpage, linkpage($3),
-                                       anchor => $4, linktext => pagetitle($2)))
+                               ? "[[$2|$3".(defined $4 ? "#$4" : "")."]]" 
+                               : is_externallink($page, $3, $4)
+                                       ? externallink($3, $4, $2)
+                                       : htmllink($page, $destpage, linkpage($3),
+                                               anchor => $4, linktext => pagetitle($2)))
                        : ( $1 
-                               ? "[[$3".($4 ? "#$4" : "")."]]"
-                               : htmllink($page, $destpage, linkpage($3),
-                                       anchor => $4))
+                               ? "[[$3".(defined $4 ? "#$4" : "")."]]"
+                               : is_externallink($page, $3, $4)
+                                       ? externallink($3, $4)
+                                       : htmllink($page, $destpage, linkpage($3),
+                                               anchor => $4))
        }eg;
        
        return $params{content};
@@ -87,7 +140,9 @@ sub scan (@) {
        my $content=$params{content};
 
        while ($content =~ /(?<!\\)$link_regexp/g) {
-               add_link($page, linkpage($2));
+               if (! is_externallink($page, $2, $3, 1)) {
+                       add_link($page, linkpage($2));
+               }
        }
 }
 
@@ -98,24 +153,26 @@ sub renamepage (@) {
        my $new=$params{newpage};
 
        $params{content} =~ s{(?<!\\)$link_regexp}{
-               my $linktext=$2;
-               my $link=$linktext;
-               if (bestlink($page, linkpage($linktext)) eq $old) {
-                       $link=pagetitle($new, 1);
-                       $link=~s/ /_/g;
-                       if ($linktext =~ m/.*\/*?[A-Z]/) {
-                               # preserve leading cap of last component
-                               my @bits=split("/", $link);
-                               $link=join("/", @bits[0..$#bits-1], ucfirst($bits[$#bits]));
-                       }
-                       if (index($linktext, "/") == 0) {
-                               # absolute link
-                               $link="/$link";
+               if (! is_externallink($page, $2, $3)) {
+                       my $linktext=$2;
+                       my $link=$linktext;
+                       if (bestlink($page, linkpage($linktext)) eq $old) {
+                               $link=pagetitle($new, 1);
+                               $link=~s/ /_/g;
+                               if ($linktext =~ m/.*\/*?[A-Z]/) {
+                                       # preserve leading cap of last component
+                                       my @bits=split("/", $link);
+                                       $link=join("/", @bits[0..$#bits-1], ucfirst($bits[$#bits]));
+                               }
+                               if (index($linktext, "/") == 0) {
+                                       # absolute link
+                                       $link="/$link";
+                               }
                        }
+                       defined $1
+                               ? ( "[[$1|$link".($3 ? "#$3" : "")."]]" )
+                               : ( "[[$link".   ($3 ? "#$3" : "")."]]" )
                }
-               defined $1
-                       ? ( "[[$1|$link".($3 ? "#$3" : "")."]]" )
-                       : ( "[[$link".   ($3 ? "#$3" : "")."]]" )
        }eg;
 
        return $params{content};