2 package IkiWiki::Plugin::toggle;
8 # Here's the javascript that makes this possible. A key feature is the use
9 # of css to hide toggleables, to avoid any flashing on page load. The css
10 # is only emitted after the javascript tests that it's going to be able to
11 # show the toggleables.
12 my $javascript=<<'EOF';
13 <script type="text/javascript">
15 if (document.getElementById && document.getElementsByTagName && document.createTextNode) {
16 document.write('<style type="text/css">div.toggleable { display: none; }</style>');
17 window.onload = inittoggle;
20 function inittoggle() {
21 var as = getElementsByClass('toggle');
22 for (var i = 0; i < as.length; i++) {
23 var id = as[i].href.match(/#(\w.+)/)[1];
24 document.getElementById(id).style.display="none";
25 as[i].onclick = function() {
33 var id = s.href.match(/#(\w.+)/)[1];
34 style = document.getElementById(id).style;
35 if (style.display == "none")
36 style.display = "block";
38 style.display = "none";
41 function getElementsByClass(class) {
42 var ret = new Array();
43 var pattern = new RegExp("(^|\\s)"+class+"(\\s|$)");
44 var els = document.getElementsByTagName('*');
45 for (i = 0, j = 0; i < els.length; i++) {
46 if ( pattern.test(els[i].className) ) {
58 hook(type => "preprocess", id => "toggle",
59 call => \&preprocess_toggle);
60 hook(type => "preprocess", id => "toggleable",
61 call => \&preprocess_toggleable, scan => 1);
62 hook(type => "format", id => "toggle", call => \&format);
65 sub preprocess_toggle (@) { #{{{
66 my %params=(id => "default", text => "more", @_);
68 return "<a class=\"toggle\" href=\"#$params{page}.$params{id}\">$params{text}</a>";
71 sub preprocess_toggleable (@) { #{{{
72 my %params=(id => "default", text => "", @_);
74 # Preprocess the text to expand any preprocessor directives
75 # embedded inside it. This is why scan is set for this preprocessor
76 # directive, since it could expand to something with a link in it.
77 $params{text}=IkiWiki::preprocess($params{page}, $params{destpage}, $params{text});
79 # Should really be a postprocessor directive, oh well. Work around
80 # markdown's dislike of markdown inside a <div>.
81 return "<div class=\"toggleable\" id=\"$params{page}.$params{id}\"></div>\n\n$params{text}<div class=\"toggleableend\"></div>";
87 if ($params{content}=~s!(<div class="toggleable" id="[^"]+">)</div>!$1!g) {
88 $params{content}=~s/<div class="toggleableend">//g;
89 $params{content}=~s!^<\/body>!$javascript</body>!m;
91 return $params{content};