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#!/usr/bin/perl
package IkiWiki::Plugin::link;
use warnings;
use strict;
use IkiWiki 3.00;
my $link_regexp;
my $email_regexp = qr/^.+@.+\..+$/;
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 ($$;$) {
my $page = shift;
my $url = shift;
my $anchor = shift;
if (defined $anchor) {
$url.="#".$anchor;
}
return ($url =~ /$url_regexp|$email_regexp/)
}
sub externallink ($$;$) {
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};
my $destpage=$params{destpage};
$params{content} =~ s{(\\?)$link_regexp}{
defined $2
? ( $1
? "[[$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".(defined $4 ? "#$4" : "")."]]"
: is_externallink($page, $3, $4)
? externallink($3, $4)
: htmllink($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, $3)) {
add_link($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, $3, $4)) {
my $linktext=$3;
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 $2
? ( "[[$2|$link".($4 ? "#$4" : "")."]]" )
: ( "[[$link". ($4 ? "#$4" : "")."]]" )
}
else {
$1
}
}eg;
return $params{content};
}
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