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jQuery.fn.dw_tree = function(overrides) {
var dw_tree = {
/**
* Delay in ms before showing the throbber.
* Used to skip the throbber for fast AJAX calls.
*/
throbber_delay: 500,
$obj: this,
toggle_selector: 'a.idx_dir',
init: function () {
this.$obj.delegate(this.toggle_selector, 'click', this,
this.toggle);
jQuery('ul:first', this.$obj).attr('role', 'tree');
jQuery('ul', this.$obj).not(':first').attr('role', 'group');
jQuery('li', this.$obj).attr('role', 'treeitem');
jQuery('li.open > ul', this.$obj).attr('aria-expanded', 'true');
jQuery('li.closed > ul', this.$obj).attr('aria-expanded', 'false');
jQuery('li.closed', this.$obj).attr('aria-live', 'assertive');
},
/**
* Open or close a subtree using AJAX
* The contents of subtrees are "cached" until the page is reloaded.
* A "loading" indicator is shown only when the AJAX call is slow.
*
* @author Andreas Gohr <andi@splitbrain.org>
* @author Ben Coburn <btcoburn@silicodon.net>
* @author Pierre Spring <pierre.spring@caillou.ch>
*/
toggle: function (e) {
var $listitem, $sublist, timeout, $clicky, show_sublist, dw_tree, opening;
e.preventDefault();
dw_tree = e.data;
$clicky = jQuery(this);
$listitem = $clicky.closest('li');
$sublist = $listitem.find('ul').first();
opening = $listitem.hasClass('closed');
dw_tree.toggle_display($clicky, opening);
if ($sublist.is(':visible')) {
$listitem.removeClass('open').addClass('closed');
$sublist.attr('aria-expanded', 'false');
} else {
$listitem.removeClass('closed').addClass('open');
$sublist.attr('aria-expanded', 'true');
}
// if already open, close by hiding the sublist
if (!opening) {
$sublist.dw_hide();
return;
}
show_sublist = function (data) {
$sublist.hide();
if (typeof data !== 'undefined') {
$sublist.html(data);
$sublist.parent().attr('aria-busy', 'false').removeAttr('aria-live');
jQuery('li.closed', $sublist).attr('aria-live', 'assertive');
}
if ($listitem.hasClass('open')) {
// Only show if user didn’t close the list since starting
// to load the content
$sublist.dw_show();
}
};
// just show if already loaded
if ($sublist.length > 0) {
show_sublist();
return;
}
//prepare the new ul
$sublist = jQuery('<ul class="idx" role="group"/>');
$listitem.append($sublist);
timeout = window.setTimeout(
bind(show_sublist, '<li aria-busy="true"><img src="' + DOKU_BASE + 'lib/images/throbber.gif" alt="loading..." title="loading..." /></li>'), dw_tree.throbber_delay);
dw_tree.load_data(function (data) {
window.clearTimeout(timeout);
show_sublist(data);
}, $clicky);
},
toggle_display: function ($clicky, opening) {
},
load_data: function (show_data, $clicky) {
show_data();
}
};
jQuery.extend(dw_tree, overrides);
if (!overrides.deferInit) {
dw_tree.init();
}
return dw_tree;
};
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