From 9ec532bef538cac3583c9ba692292dbe778f1013 Mon Sep 17 00:00:00 2001
From: Frederic Massart <fred@moodle.com>
Date: Wed, 13 Mar 2013 11:14:20 +0800
Subject: [PATCH] MDL-37959 form: Aria attribute set on collapsible sections

---
 lib/formslib.php | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/lib/formslib.php b/lib/formslib.php
index c84c9b8b3f0..9923a4f56f0 100644
--- a/lib/formslib.php
+++ b/lib/formslib.php
@@ -2343,7 +2343,7 @@ class MoodleQuickForm_Renderer extends HTML_QuickForm_Renderer_Tableless{
        "\n\t\t<legend class=\"ftoggler\">{header}</legend>\n\t\t<div class=\"fcontainer clearfix\">\n\t\t";
 
     /** @var string Template used when opening a fieldset */
-    var $_openFieldsetTemplate = "\n\t<fieldset class=\"{classes}\" {id}>";
+    var $_openFieldsetTemplate = "\n\t<fieldset class=\"{classes}\" {id} {aria-live}>";
 
     /** @var string Template used when closing a fieldset */
     var $_closeFieldsetTemplate = "\n\t\t</div></fieldset>";
@@ -2587,9 +2587,11 @@ class MoodleQuickForm_Renderer extends HTML_QuickForm_Renderer_Tableless{
         }
 
         // Define collapsible classes for fieldsets.
+        $arialive = '';
         $fieldsetclasses = array('clearfix');
         if (isset($this->_collapsibleElements[$header->getAttribute('id')])) {
             $fieldsetclasses[] = 'collapsible';
+            $arialive = 'aria-live="polite"';
             if ($this->_collapsibleElements[$header->getAttribute('id')]) {
                 $fieldsetclasses[] = 'collapsed';
             }
@@ -2601,6 +2603,7 @@ class MoodleQuickForm_Renderer extends HTML_QuickForm_Renderer_Tableless{
 
         $openFieldsetTemplate = str_replace('{id}', $id, $this->_openFieldsetTemplate);
         $openFieldsetTemplate = str_replace('{classes}', join(' ', $fieldsetclasses), $openFieldsetTemplate);
+        $openFieldsetTemplate = str_replace('{aria-live}', $arialive, $openFieldsetTemplate);
 
         $this->_html .= $openFieldsetTemplate . $header_html;
         $this->_fieldsetsOpen++;