/**
* Starts conditional snippet rendering. Returns SnippetHelper object if snippet was started.
* @param Control control
* @param string snippet name
* @param string start element
* @return SnippetHelper
*/
public static function create(Control $control, $name = NULL, $tag = 'div')
{
if (self::$outputAllowed) {
// rendering flow or non-AJAX request
$obj = new self();
$obj->tag = trim($tag, '<>');
if ($obj->tag) {
echo '<', $obj->tag, ' id="', $control->getSnippetId($name), '">';
}
return $obj;
// or string?
} elseif ($control->isControlInvalid($name)) {
// start snippet buffering
$obj = new self();
$obj->id = $control->getSnippetId($name);
$obj->payload = $control->getPresenter()->getPayload();
ob_start();
$obj->level = ob_get_level();
self::$outputAllowed = TRUE;
return $obj;
} else {
return FALSE;
}
}
public static function renderSnippets(Control $control, stdClass $local, array $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]);
}
}
}
$control->snippetMode = TRUE;
if ($control instanceof IRenderable) {
$queue = array($control);
do {
foreach (array_shift($queue)->getComponents() as $child) {
if ($child instanceof IRenderable) {
if ($child->isControlInvalid()) {
$child->snippetMode = TRUE;
$child->render();
$child->snippetMode = FALSE;
}
} elseif ($child instanceof IComponentContainer) {
$queue[] = $child;
}
}
} while ($queue);
}
}
