/**
* Pops a style from the stack.
*
* @param OutputFormatterStyleInterface $style
*
* @return OutputFormatterStyleInterface
*
* @throws \InvalidArgumentException When style tags incorrectly nested
*/
public function pop(OutputFormatterStyleInterface $style = null)
{
if (empty($this->styles)) {
return $this->emptyStyle;
}
if (null === $style) {
return array_pop($this->styles);
}
foreach (array_reverse($this->styles, true) as $index => $stackedStyle) {
if ($style->apply('') === $stackedStyle->apply('')) {
$this->styles = array_slice($this->styles, 0, $index);
return $stackedStyle;
}
}
throw new \InvalidArgumentException('Incorrectly nested style tag found.');
}
/**
* Applies style to text if must be applied.
*
* @param OutputFormatterStyleInterface $style Style to apply
* @param string $text Input text
*
* @return string string Styled text
*/
private function applyStyle(OutputFormatterStyleInterface $style, $text)
{
return $this->isDecorated() && strlen($text) > 0 ? $style->apply($text) : $text;
}