/**
* Renders a view file.
*
* If [[theme]] is enabled (not null), it will try to render the themed version of the view file as long
* as it is available.
*
* The method will call [[FileHelper::localize()]] to localize the view file.
*
* If [[renderers|renderer]] is enabled (not null), the method will use it to render the view file.
* Otherwise, it will simply include the view file as a normal PHP file, capture its output and
* return it as a string.
*
* @param string $viewFile the view file. This can be either an absolute file path or an alias of it.
* @param array $params the parameters (name-value pairs) that will be extracted and made available in the view file.
* @param object $context the context that the view should use for rendering the view. If null,
* existing [[context]] will be used.
* @return string the rendering result
* @throws InvalidParamException if the view file does not exist
*/
public function renderFile($viewFile, $params = [], $context = null)
{
$viewFile = Leaps::getAlias($viewFile);
if ($this->theme !== null) {
$viewFile = $this->theme->applyTo($viewFile);
}
if (is_file($viewFile)) {
$viewFile = FileHelper::localize($viewFile);
} else {
throw new InvalidParamException("The view file does not exist: {$viewFile}");
}
$oldContext = $this->context;
if ($context !== null) {
$this->context = $context;
}
$output = '';
$this->_viewFiles[] = $viewFile;
if ($this->beforeRender($viewFile, $params)) {
Leaps::trace("Rendering view file: {$viewFile}", __METHOD__);
$ext = pathinfo($viewFile, PATHINFO_EXTENSION);
if (isset($this->renderers[$ext])) {
if (is_array($this->renderers[$ext]) || is_string($this->renderers[$ext])) {
$this->renderers[$ext] = Leaps::createObject($this->renderers[$ext]);
}
/* @var $renderer ViewRenderer */
$renderer = $this->renderers[$ext];
$output = $renderer->render($this, $viewFile, $params);
} else {
$output = $this->renderPhpFile($viewFile, $params);
}
$this->afterRender($viewFile, $params, $output);
}
array_pop($this->_viewFiles);
$this->context = $oldContext;
return $output;
}
