Use a more reliable way to detect the current page, fixes #420

libs/Tree/Root.php

@@ -7,6 +7,9 @@ class Root extends Directory
     /** @var Config */
     protected $config;
 
+    /** @var Entry */
+    protected $activeNode;
+
     /**
      * The root doesn't have a parent
      */
@@ -33,4 +36,30 @@ class Root extends Directory
     {
         $this->config = $config;
     }
+
+    public function isHotPath(Entry $node = null) {
+        if ($node == null) {
+            return true;
+        }
+
+        if ($this->activeNode == null) {
+            return false;
+        }
+
+        if ($node == $this->activeNode) {
+            return true;
+        }
+
+        foreach ($this->activeNode->getParents() as $parent) {
+            if ($node == $parent) {
+                return true;
+            }
+        }
+
+        return false;
+    }
+
+    public function setActiveNode(Entry $node) {
+        $this->activeNode = $node;
+    }
 }