UIMacros.php

	public static function renderSnippets($control, $local, $params)
	{
		$control->snippetMode = FALSE;
		$payload = $control->getPresenter()->getPayload();
		if (isset($local->blocks)) {
			foreach ($local->blocks as $name => $function) {
				if ($name[0] !== '_' || !$control->isControlInvalid(substr($name, 1))) {
					continue;
				}
				ob_start();
				$function = reset($function);
				$snippets = $function($local, $params);
				$payload->snippets[$id = $control->getSnippetId(substr($name, 1))] = ob_get_clean();
				if ($snippets) {
					$payload->snippets += $snippets;
					unset($payload->snippets[$id]);
				}
			}
		}
		
		if ($control instanceof Nette\Application\UI\IRenderable) {
			$queue = array($control);
			do {
				foreach (array_shift($queue)->getComponents() as $child) {
					if ($child instanceof Nette\Application\UI\IRenderable) {
						if ($child->isControlInvalid()) {
							$child->snippetMode = TRUE;
							$child->render();
							$child->snippetMode = FALSE;
						}

					} else if ($child instanceof Nette\ComponentModel\IContainer) {
						$queue[] = $child;
					}
				}
				
			} while ($queue);
		}
	}