IkiWiki/Plugin/embed.pm

   1 #!/usr/bin/perl
   2 package IkiWiki::Plugin::embed;
   3
   4 use warnings;
   5 use strict;
   6 use IkiWiki 3.00;
   7
   8 my $attribr=qr/[^<>"]+/;
   9
  10 # regexp matching known-safe html
  11 my $safehtml=qr{(
  12         # google maps
  13         <\s*iframe\s+width="\d+"\s+height="\d+"\s+frameborder="$attribr"\s+
  14         scrolling="$attribr"\s+marginheight="\d+"\s+marginwidth="\d+"\s+
  15         src="http://maps.google.com/\?$attribr"\s*>\s*</iframe>
  16
  17         |
  18
  19         # youtube
  20         <\s*object\s+width="\d+"\s+height="\d+"\s*>\s*
  21         <\s*param\s+name="movie"\s+value="http://www.youtube.com/v/$attribr"\s*>\s*
  22         </param>\s*
  23         <\s*param\s+name="wmode"\s+value="transparent"\s*>\s*</param>\s*
  24         <embed\s+src="http://www.youtube.com/v/$attribr"\s+
  25         type="application/x-shockwave-flash"\s+wmode="transparent"\s+
  26         width="\d+"\s+height="\d+"\s*>\s*</embed>\s*</object>
  27
  28         |
  29
  30         # google video
  31         <\s*embed\s+style="\s*width:\d+px;\s+height:\d+px;\s*"\s+id="$attribr"\s+
  32         type="application/x-shockwave-flash"\s+
  33         src="http://video.google.com/googleplayer.swf\?$attribr"\s+
  34         flashvars=""\s*>\s*</embed>
  35
  36         |
  37
  38         # google calendar
  39         <\s*iframe\s+src="http://www.google.com/calendar/embed\?src=$attribr"\s+
  40         style="\s*border-width:\d+\s*"\s+width="\d+"\s+frameborder="\d+"\s*
  41         height="\d+"\s*>\s*</iframe>
  42 )}sx;
  43
  44 my @embedded;
  45
  46 sub import {
  47         hook(type => "getsetup", id => "embed", call => \&getsetup);
  48         hook(type => "filter", id => "embed", call => \&filter);
  49 }
  50
  51 sub getsetup () {
  52         return
  53                 plugin => {
  54                         safe => 1,
  55                         rebuild => undef,
  56                 },
  57 }
  58
  59 sub embed ($) {
  60         hook(type => "format", id => "embed", call => \&format) unless @embedded;
  61         push @embedded, shift;
  62         return "<div class=\"embed$#embedded\"></div>";
  63 }
  64
  65 sub filter (@) {
  66         my %params=@_;
  67         $params{content} =~ s/$safehtml/embed($1)/eg;
  68         return $params{content};
  69 }
  70
  71 sub format (@) {
  72         my %params=@_;
  73         $params{content} =~ s/<div class="embed(\d+)"><\/div>/$embedded[$1]/eg;
  74         return $params{content};
  75 }
  76
  77 1