MDL-62144 user menu: Accessibility

Ensure user menu passes the accessibility tests.

lib/outputcomponents.php

@@ -4127,6 +4127,12 @@ class action_menu implements renderable, templatable {
      */
     public $actiontext = null;
 
+    /**
+     * The string to use for the accessible label for the menu.
+     * @var array
+     */
+    public $actionlabel = null;
+
     /**
      * An icon to use for the toggling the secondary menu (dropdown).
      * @var actionicon
@@ -4184,6 +4190,16 @@ public function __construct(array $actions = array()) {
         }
     }
 
+    /**
+     * Sets the label for the menu trigger.
+     *
+     * @param string $label The text
+     * @return null
+     */
+    public function set_action_label($label) {
+        $this->actionlabel = $label;
+    }
+
     /**
      * Sets the menu trigger text.
      *
@@ -4306,10 +4322,17 @@ public function get_primary_actions(core_renderer $output = null) {
         if ($this->actiontext) {
             $string = $this->actiontext;
         }
+        $label = '';
+        if ($this->actionlabel) {
+            $label = $this->actionlabel;
+        } else {
+            $label = $title;
+        }
         $actions = $this->primaryactions;
         $attributes = array(
             'class' => implode(' ', $linkclasses),
             'title' => $title,
+            'aria-label' => $label,
             'id' => 'action-menu-toggle-'.$this->instance,
             'role' => 'menuitem'
         );
@@ -4475,6 +4498,13 @@ public function export_for_template(renderer_base $output) {
         if (!empty($this->menutrigger)) {
             $primary->menutrigger = $this->menutrigger;
             $primary->triggerextraclasses = $this->triggerextraclasses;
+            if ($this->actionlabel) {
+                $primary->title = $this->actionlabel;
+            } else if ($this->actiontext) {
+                $primary->title = $this->actiontext;
+            } else {
+                $primary->title = strip_tags($this->menutrigger);
+            }
         } else {
             $primary->title = get_string('actionsmenu');
             $actionicon = new pix_icon('t/edit_menu', '', 'moodle', ['class' => 'iconsmall actionmenu', 'title' => $primary->title]);

lib/outputrenderers.php

@@ -3439,6 +3439,7 @@ public function user_menu($user = null, $withlinks = null) {
         $am->set_menu_trigger(
             $returnstr
         );
+        $am->set_action_label(get_string('usermenu'));
         $am->set_alignment(action_menu::TR, action_menu::BR);
         $am->set_nowrap_on_items();
         if ($withlinks) {