/**
* Renders and returns output for given template filename with its
* array of data. Handles parent/extended templates.
*
* @param string $viewFile Filename of the view
* @param array $data Data to include in rendered view. If empty the current
* View::$viewVars will be used.
* @return string Rendered output
* @throws \LogicException When a block is left open.
* @triggers View.beforeRenderFile $this, [$viewFile]
* @triggers View.afterRenderFile $this, [$viewFile, $content]
*/
protected function _render($viewFile, $data = [])
{
if (empty($data)) {
$data = $this->viewVars;
}
$this->_current = $viewFile;
$initialBlocks = count($this->Blocks->unclosed());
$this->dispatchEvent('View.beforeRenderFile', [$viewFile]);
$content = $this->_evaluate($viewFile, $data);
$afterEvent = $this->dispatchEvent('View.afterRenderFile', [$viewFile, $content]);
if (isset($afterEvent->result)) {
$content = $afterEvent->result;
}
if (isset($this->_parents[$viewFile])) {
$this->_stack[] = $this->fetch('content');
$this->assign('content', $content);
$content = $this->_render($this->_parents[$viewFile]);
$this->assign('content', array_pop($this->_stack));
}
$remainingBlocks = count($this->Blocks->unclosed());
if ($initialBlocks !== $remainingBlocks) {
throw new LogicException(sprintf('The "%s" block was left open. Blocks are not allowed to cross files.', $this->Blocks->active()));
}
return $content;
}