From 0e1777cbe86faf809f67198704842a01034a1a98 Mon Sep 17 00:00:00 2001
From: Anika Henke <anika@selfthinker.org>
Date: Wed, 31 Jul 2013 17:05:07 +0100
Subject: added aria attributes to tree and show/hide functions

---
 lib/scripts/tree.js | 20 +++++++++++++++++---
 1 file changed, 17 insertions(+), 3 deletions(-)

(limited to 'lib/scripts/tree.js')

diff --git a/lib/scripts/tree.js b/lib/scripts/tree.js
index 96763053d..c4e1da3f7 100644
--- a/lib/scripts/tree.js
+++ b/lib/scripts/tree.js
@@ -14,6 +14,12 @@ jQuery.fn.dw_tree = function(overrides) {
         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');
         },
 
         /**
@@ -35,8 +41,14 @@ jQuery.fn.dw_tree = function(overrides) {
             $listitem = $clicky.closest('li');
             $sublist = $listitem.find('ul').first();
             opening = $listitem.hasClass('closed');
-            $listitem.toggleClass('open closed');
             dw_tree.toggle_display($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) {
@@ -48,6 +60,8 @@ jQuery.fn.dw_tree = function(overrides) {
                 $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
@@ -63,11 +77,11 @@ jQuery.fn.dw_tree = function(overrides) {
             }
 
             //prepare the new ul
-            $sublist = jQuery('<ul class="idx"/>');
+            $sublist = jQuery('<ul class="idx" role="group"/>');
             $listitem.append($sublist);
 
             timeout = window.setTimeout(
-                bind(show_sublist, '<li><img src="' + DOKU_BASE + 'lib/images/throbber.gif" alt="loading..." title="loading..." /></li>'), dw_tree.throbber_delay);
+                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);
-- 
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