IkiWiki/Plugin/toggle.pm

   1 #!/usr/bin/perl
   2 package IkiWiki::Plugin::toggle;
   3
   4 use warnings;
   5 use strict;
   6 use IkiWiki 3.00;
   7
   8 sub import {
   9         add_underlay("javascript");
  10         hook(type => "getsetup", id => "toggle", call => \&getsetup);
  11         hook(type => "preprocess", id => "toggle",
  12                 call => \&preprocess_toggle);
  13         hook(type => "preprocess", id => "toggleable",
  14                 call => \&preprocess_toggleable);
  15         hook(type => "format", id => "toggle", call => \&format);
  16 }
  17
  18 sub getsetup () {
  19         return
  20                 plugin => {
  21                         safe => 1,
  22                         rebuild => undef,
  23                         section => "widget",
  24                 },
  25 }
  26
  27 sub genid ($$) {
  28         my $page=shift;
  29         my $id=shift;
  30
  31         $id="$page.$id";
  32
  33         # make it a legal html id attribute
  34         $id=~s/[^-a-zA-Z0-9.]/-/g;
  35         if ($id !~ /^[a-zA-Z]/) {
  36                 $id="id$id";
  37         }
  38         return $id;
  39 }
  40
  41 sub preprocess_toggle (@) {
  42         my %params=(id => "default", text => "more", @_);
  43
  44         my $id=genid($params{page}, $params{id});
  45         return "<a class=\"toggle\" href=\"#$id\">$params{text}</a>";
  46 }
  47
  48 sub preprocess_toggleable (@) {
  49         my %params=(id => "default", text => "", open => "no", @_);
  50
  51         # Preprocess the text to expand any preprocessor directives
  52         # embedded inside it.
  53         $params{text}=IkiWiki::preprocess($params{page}, $params{destpage},
  54                 IkiWiki::filter($params{page}, $params{destpage}, $params{text}));
  55
  56         my $id=genid($params{page}, $params{id});
  57         my $class=(lc($params{open}) ne "yes") ? "toggleable" : "toggleable-open";
  58
  59         # Should really be a postprocessor directive, oh well. Work around
  60         # markdown's dislike of markdown inside a <div> with various funky
  61         # whitespace.
  62         my ($indent)=$params{text}=~/( +)$/;
  63         $indent="" unless defined $indent;
  64         return "<div class=\"$class\" id=\"$id\"></div>\n\n$params{text}\n$indent<div class=\"toggleableend\"></div>";
  65 }
  66
  67 sub format (@) {
  68         my %params=@_;
  69
  70         if ($params{content}=~s!(<div class="toggleable(?:-open)?" id="[^"]+">\s*)</div>!$1!g) {
  71                 $params{content}=~s/<div class="toggleableend">//g;
  72                 if (! ($params{content}=~s!^(<body[^>]*>)!$1.include_javascript($params{page})!em)) {
  73                         # no </body> tag, probably in preview mode
  74                         $params{content}=include_javascript($params{page}, 1).$params{content};
  75                 }
  76         }
  77         return $params{content};
  78 }
  79
  80 sub include_javascript ($;$) {
  81         my $page=shift;
  82         my $absolute=shift;
  83
  84         return '<script src="'.urlto("ikiwiki.js", $page, $absolute).
  85                 '" type="text/javascript" charset="utf-8"></script>'."\n".
  86                 '<script src="'.urlto("toggle.js", $page, $absolute).
  87                 '" type="text/javascript" charset="utf-8"></script>';
  88 }
  89
  90 1