NavigationItem: Allow to dynamically decide whether to render an item

refs #5600

library/Icinga/Web/Navigation/NavigationItem.php

@@ -108,6 +108,13 @@ class NavigationItem implements IteratorAggregate
      */
     protected $renderer;
 
+    /**
+     * Whether to render this item
+     *
+     * @var bool
+     */
+    protected $render;
+
     /**
      * Create a new NavigationItem
      *
@@ -117,6 +124,7 @@ class NavigationItem implements IteratorAggregate
     public function __construct($name, array $properties = null)
     {
         $this->setName($name);
+        $this->render = true;
         $this->priority = 100;
         $this->children = new Navigation();
 
@@ -689,6 +697,41 @@ class NavigationItem implements IteratorAggregate
         return $this->renderer;
     }
 
+    /**
+     * Set whether this item should be rendered
+     *
+     * @param   bool    $state
+     *
+     * @return  $this
+     */
+    public function setRender($state = true)
+    {
+        $this->render = (bool) $state;
+        return $this;
+    }
+
+    /**
+     * Return whether this item should be rendered
+     *
+     * @return  bool
+     */
+    public function getRender()
+    {
+        return $this->render;
+    }
+
+    /**
+     * Return whether this item should be rendered
+     *
+     * Alias for NavigationItem::getRender().
+     *
+     * @return  bool
+     */
+    public function shouldRender()
+    {
+        return $this->getRender();
+    }
+
     /**
      * Return this item rendered to HTML
      *

library/Icinga/Web/Navigation/Renderer/NavigationRenderer.php

@@ -347,9 +347,11 @@ class NavigationRenderer implements RecursiveIterator, NavigationRendererInterfa
     {
         foreach ($this as $item) {
             /** @var NavigationItem $item */
-            $this->content[] = $this->beginItemMarkup($item);
+            if ($item->shouldRender()) {
-            $this->content[] = $item->render();
+                $this->content[] = $this->beginItemMarkup($item);
-            $this->content[] = $this->endItemMarkup();
+                $this->content[] = $item->render();
+                $this->content[] = $this->endItemMarkup();
+            }
         }
 
         return join("\n", $this->content);

library/Icinga/Web/Navigation/Renderer/RecursiveNavigationRenderer.php

@@ -129,10 +129,12 @@ class RecursiveNavigationRenderer extends RecursiveIteratorIterator implements N
     {
         foreach ($this as $item) {
             /** @var NavigationItem $item */
-            $this->content[] = $this->getInnerIterator()->beginItemMarkup($item);
+            if ($item->shouldRender()) {
-            $this->content[] = $item->render();
+                $this->content[] = $this->getInnerIterator()->beginItemMarkup($item);
-            if (! $item->hasChildren()) {
+                $this->content[] = $item->render();
-                $this->content[] = $this->getInnerIterator()->endItemMarkup();
+                if (! $item->hasChildren()) {
+                    $this->content[] = $this->getInnerIterator()->endItemMarkup();
+                }
             }
         }