path: root/IkiWiki/Plugin/link.pm

#!/usr/bin/perl
package IkiWiki::Plugin::link;

use warnings;
use strict;
use IkiWiki 2.00;

my $link_regexp;

sub import { #{{{
    hook(type => "checkconfig", id => "link", call => \&checkconfig);
    hook(type => "linkify", id => "link", call => \&linkify);
    hook(type => "scan", id => "link", call => \&scan);
} # }}}

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 linkify (@) { #{{{
    my %params=@_;
    my $page=$params{page};
    my $destpage=$params{destpage};

    $params{content} =~ s{(\\?)$link_regexp}{
        defined $2
            ? ( $1 
                ? "[[$2|$3".($4 ? "#$4" : "")."]]" 
                : htmllink($page, $destpage, IkiWiki::linkpage($3),
                    anchor => $4, linktext => IkiWiki::pagetitle($2)))
            : ( $1 
                ? "[[$3".($4 ? "#$4" : "")."]]"
                : htmllink($page, $destpage, IkiWiki::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) {
        push @{$links{$page}}, IkiWiki::linkpage($2);
    }
} # }}}

1