From b6b9036821e4874e6a65c7508d3b168ce0aa4873 Mon Sep 17 00:00:00 2001
From: Mikael Nordfeldth <mmn@hethane.se>
Date: Sat, 14 Feb 2015 17:32:35 +0100
Subject: [PATCH] StartSubMenu and EndSubMenu events

---
 EVENTS.txt   |  9 +++++++++
 lib/menu.php | 12 ++++++------
 2 files changed, 15 insertions(+), 6 deletions(-)

diff --git a/EVENTS.txt b/EVENTS.txt
index b98c6ff52f..9a6ddfd9a4 100644
--- a/EVENTS.txt
+++ b/EVENTS.txt
@@ -1472,3 +1472,12 @@ EndHomeStubNavItems:
 - $action: action being executed (for output and params)
 - $items: array of items in the nav
 
+EndSubMenu: After outputting a submenu (including enclosing tags) to HTML
+- $out:     HTMLOutputter used to output (usually an Action, but not always!)
+- $menu:    The Menu object outputted as a submenu.
+- $label:   Localized text which represents the menu item.
+
+StartSubMenu: Before outputting a submenu (including enclosing tags) to HTML
+- $out:     HTMLOutputter used to output (usually an Action, but not always!)
+- $menu:    The Menu object outputted as a submenu.
+- $label:   Localized text which represents the menu item.
diff --git a/lib/menu.php b/lib/menu.php
index 4baeb70d2f..236e99263d 100644
--- a/lib/menu.php
+++ b/lib/menu.php
@@ -150,12 +150,12 @@ class Menu extends Widget
 
     function submenu($label, $menu)
     {
-        if (empty($menu->getItems())){
-            return false;
+        if (Event::handle('StartSubMenu', array($this->action, $menu, $label))) {
+            $this->action->elementStart('li');
+            $this->action->element('h3', null, $label);
+            $menu->show();
+            $this->action->elementEnd('li');
+            Event::handle('EndSubMenu', array($this->action, $menu, $label));
         }
-        $this->action->elementStart('li');
-        $this->action->element('h3', null, $label);
-        $menu->show();
-        $this->action->elementEnd('li');
     }
 }