121 lines
3.1 KiB
Perl
121 lines
3.1 KiB
Perl
#!/usr/bin/perl
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package IkiWiki::Plugin::toggle;
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use warnings;
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use strict;
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use IkiWiki 2.00;
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# Here's the javascript that makes this possible. A key feature is the use
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# of css to hide toggleables, to avoid any flashing on page load. The css
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# is only emitted after the javascript tests that it's going to be able to
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# show the toggleables.
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my $javascript=<<'EOF';
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<script type="text/javascript">
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<!--
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if (document.getElementById && document.getElementsByTagName && document.createTextNode) {
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document.write('<style type="text/css">div.toggleable { display: none; }</style>');
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window.onload = inittoggle;
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}
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function inittoggle() {
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var as = getElementsByClass('toggle');
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for (var i = 0; i < as.length; i++) {
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var id = as[i].href.match(/#(\w.+)/)[1];
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document.getElementById(id).style.display="none";
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as[i].onclick = function() {
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toggle(this);
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return false;
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}
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}
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}
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function toggle(s) {
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var id = s.href.match(/#(\w.+)/)[1];
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style = document.getElementById(id).style;
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if (style.display == "none")
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style.display = "block";
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else
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style.display = "none";
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}
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function getElementsByClass(class) {
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var ret = new Array();
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var pattern = new RegExp("(^|\\s)"+class+"(\\s|$)");
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var els = document.getElementsByTagName('*');
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for (i = 0, j = 0; i < els.length; i++) {
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if ( pattern.test(els[i].className) ) {
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ret[j] = els[i];
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j++;
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}
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}
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return ret;
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}
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//-->
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</script>
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EOF
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sub import { #{{{
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hook(type => "preprocess", id => "toggle",
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call => \&preprocess_toggle);
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hook(type => "preprocess", id => "toggleable",
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call => \&preprocess_toggleable);
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hook(type => "format", id => "toggle", call => \&format);
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} # }}}
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sub genid ($$) { #{{{
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my $page=shift;
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my $id=shift;
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$id="$page.$id";
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# make it a legal html id attribute
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$id=~s/[^-a-zA-Z0-9.]/-/g;
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if ($id !~ /^[a-zA-Z]/) {
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$id="id$id";
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}
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return $id;
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} #}}}
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sub preprocess_toggle (@) { #{{{
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my %params=(id => "default", text => "more", @_);
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my $id=genid($params{page}, $params{id});
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if (! $params{preview}) {
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return "<a class=\"toggle\" href=\"#$id\">$params{text}</a>";
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}
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else {
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return "$params{text} ".
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gettext("(not toggleable in preview mode)");
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}
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} # }}}
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sub preprocess_toggleable (@) { #{{{
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my %params=(id => "default", text => "", @_);
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# Preprocess the text to expand any preprocessor directives
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# embedded inside it.
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$params{text}=IkiWiki::preprocess($params{page}, $params{destpage},
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IkiWiki::filter($params{page}, $params{destpage}, $params{text}));
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my $id=genid($params{page}, $params{id});
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# Should really be a postprocessor directive, oh well. Work around
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# markdown's dislike of markdown inside a <div> with various funky
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# whitespace.
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my ($indent)=$params{text}=~/( +)$/;
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$indent="" unless defined $indent;
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return "<div class=\"toggleable\" id=\"$id\"></div>\n\n$params{text}\n$indent<div class=\"toggleableend\"></div>";
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} # }}}
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sub format (@) { #{{{
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my %params=@_;
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if ($params{content}=~s!(<div class="toggleable" id="[^"]+">)</div>!$1!g) {
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$params{content}=~s/<div class="toggleableend">//g;
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$params{content}=~s!^<\/body>!$javascript</body>!m;
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}
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return $params{content};
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} # }}}
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1
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