Add lazy component init

Author: technicalguru

src/WebApp/Component/LazyInitializer.php

@@ -0,0 +1,9 @@
+<?php
+
+namespace WebApp\Component;
+
+/** Component that has a special method that will be called immediately before rendering */
+interface LazyInitializer {
+
+	public function lazyInit();
+}

src/WebApp/Theme.php

@@ -107,6 +107,9 @@ public function renderComponent($component) {
 			}
 			return $rc;
 		} else if (is_object($component)) {
+			if (is_a($component, 'WebApp\\Component\\LazyInitializer')) {
+				$component->lazyInit();
+			}
 			return $this->getRenderer($component)->render();
 		}
 		return '';