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#!/usr/bin/perl
package IkiWiki::Plugin::link;
use warnings;
use strict;
use IkiWiki 3.00;
my $link_regexp;
my $email_regexp = qr/^(?:[a-z0-9!#$%&'*+\/=?^_`{|}~-]+(?:\.[a-z0-9!#$%&'*+\/=?^_`{|}~-]+)*|"(?:[\x01-\x08\x0b\x0c\x0e-\x1f\x21\x23-\x5b\x5d-\x7f]|\\[\x01-\x09\x0b\x0c\x0e-\x7f])*")@(?:(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?|\[(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?|[a-z0-9-]*[a-z0-9]:(?:[\x01-\x08\x0b\x0c\x0e-\x1f\x21-\x5a\x53-\x7f]|\\[\x01-\x09\x0b\x0c\x0e-\x7f])+)\])$/i;
my $url_regexp = qr/^(?:[^:]+:\/\/|mailto:).*/i;
sub import {
hook(type => "getsetup", id => "link", call => \&getsetup);
hook(type => "checkconfig", id => "link", call => \&checkconfig);
hook(type => "linkify", id => "link", call => \&linkify);
hook(type => "scan", id => "link", call => \&scan);
hook(type => "renamepage", id => "link", call => \&renamepage);
}
sub getsetup () {
return
plugin => {
safe => 1,
rebuild => 1,
section => "core",
},
}
sub checkconfig () {
if ($config{prefix_directives}) {
$link_regexp = qr{
\[\[(?=[^!]) # beginning of link
(?:
([^\]\|]+) # 1: link text
\| # followed by '|'
)? # optional
([^\n\r\]#]+) # 2: page to link to
(?:
\# # '#', beginning of anchor
([^\s\]]+) # 3: anchor text
)? # optional
\]\] # end of link
}x;
}
else {
$link_regexp = qr{
\[\[ # beginning of link
(?:
([^\]\|\n\s]+) # 1: link text
\| # followed by '|'
)? # optional
([^\s\]#]+) # 2: page to link to
(?:
\# # '#', beginning of anchor
([^\s\]]+) # 3: anchor text
)? # optional
\]\] # end of link
}x;
}
}
sub is_externallink ($$) {
my $page = shift;
my $url = shift;
if ($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.
$url =~ s/#.*//;
return (! (bestlink($page, linkpage($url))))
}
return ($url =~ /$url_regexp/)
}
sub externallink ($;@) {
my $url = shift;
my $pagetitle = shift;
# build pagetitle
if (!($pagetitle)) {
$pagetitle = $url;
# use only the email address as title for mailto: urls
if ($pagetitle =~ /^mailto:.*/) {
$pagetitle =~ s/^mailto:([^?]+).*/$1/;
}
}
# handle email-addresses (without mailto:):
if ($url =~ /$email_regexp/) {
$url = "mailto:" . $url;
}
return "<a href=\"$url\">$pagetitle</a>";
}
sub linkify (@) {
my %params=@_;
my $page=$params{page};
my $destpage=$params{destpage};
$params{content} =~ s{(\\?)$link_regexp}{
defined $2
? ( $1
? "[[$2|$3".($4 ? "#$4" : "")."]]"
: is_externallink($page, $3 . ($4 ? "#$4" : ""))
? externallink("$3" . ($4 ? "#$4" : ""), $2)
: htmllink($page, $destpage, linkpage($3),
anchor => $4, linktext => pagetitle($2)))
: ( $1
? "[[$3".($4 ? "#$4" : "")."]]"
: is_externallink($page, $3 . ($4 ? "#$4" : ""))
? externallink("$3" . ($4 ? "#$4" : ""))
: htmllink($page, $destpage, linkpage($3),
anchor => $4))
}eg;
return $params{content};
}
sub scan (@) {
my %params=@_;
my $page=$params{page};
my $content=$params{content};
while ($content =~ /(?<!\\)$link_regexp/g) {
if (! is_externallink($page, $2 . ($3 ? "#$3" : ""))) {
add_link($page, linkpage($2));
}
}
}
sub renamepage (@) {
my %params=@_;
my $page=$params{page};
my $old=$params{oldpage};
my $new=$params{newpage};
$params{content} =~ s{(?<!\\)$link_regexp}{
if (! is_externallink($page, $2 . ($3 ? "#$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" : "")."]]" )
}
}eg;
return $params{content};
}
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