Remove Menu::compact() in favor of putting an if-then clause in

menu.html.php.  This serves two purposes:

1) It's more efficient since we're doing less passes over the Menu tree
2) We're allowing themers to decide whether or not to show empty menus

modules/gallery/libraries/Admin_View.php

@@ -47,7 +47,7 @@ class Admin_View_Core extends Gallery_View {
   public function admin_menu() {
     $menu = Menu::factory("root");
     module::event("admin_menu", $menu, $this);
-    return $menu->compact()->render();
+    return $menu->render();
   }
 
   /**

modules/gallery/libraries/Menu.php

@@ -155,19 +155,6 @@ class Menu_Core extends Menu_Element {
     }
   }
 
-  public function compact() {
-    foreach ($this->elements as $target_id => $element) {
-      if ($element->type == "submenu") {
-        if (empty($element->elements)) {
-          $this->remove($target_id);
-        } else {
-          $element->compact();
-        }
-      }
-    }
-    return $this;
-  }
-
   public function __construct($type) {
     parent::__construct($type);
     $this->elements = array();

modules/gallery/libraries/Theme_View.php

@@ -81,19 +81,19 @@ class Theme_View_Core extends Gallery_View {
   public function site_menu() {
     $menu = Menu::factory("root");
     module::event("site_menu", $menu, $this);
-    return $menu->compact()->render();
+    return $menu->render();
   }
 
   public function album_menu() {
     $menu = Menu::factory("root");
     module::event("album_menu", $menu, $this);
-    return $menu->compact()->render();
+    return $menu->render();
   }
 
   public function tag_menu() {
     $menu = Menu::factory("root");
     module::event("tag_menu", $menu, $this);
-    return $menu->compact()->render();
+    return $menu->render();
   }
 
   public function photo_menu() {
@@ -107,13 +107,13 @@ class Theme_View_Core extends Gallery_View {
     }
 
     module::event("photo_menu", $menu, $this);
-    return $menu->compact()->render();
+    return $menu->render();
   }
 
   public function movie_menu() {
     $menu = Menu::factory("root");
     module::event("movie_menu", $menu, $this);
-    return $menu->compact()->render();
+    return $menu->render();
   }
 
   public function context_menu($item, $thumbnail_css_selector) {
@@ -124,7 +124,7 @@ class Theme_View_Core extends Gallery_View {
       ->css_class("g-context-menu");
 
     module::event("context_menu", $menu, $this, $item, $thumbnail_css_selector);
-    return $menu->compact()->render();
+    return $menu->render();
   }
 
   public function pager() {

modules/gallery/views/menu.html.php

@@ -1,4 +1,5 @@
 <?php defined("SYSPATH") or die("No direct script access.") ?>
+<? if ($menu->elements): // Don't show the menu if it has no choices ?>
 <? if ($menu->is_root): ?>
 
 <ul class="<?= $menu->css_class ?>">
@@ -21,3 +22,4 @@
 </li>
 
 <? endif ?>
+<? endif ?>