<?php
/**
* @package s9e\TextFormatter
* @copyright Copyright (c) 2010-2021 The s9e authors
* @license http://www.opensource.org/licenses/mit-license.php The MIT License
*/
namespace s9e\TextFormatter\Configurator\TemplateNormalizations;
use DOMElement;
class InlineTextElements extends AbstractNormalization
{
/**
* {@inheritdoc}
*/
protected $queries = ['//xsl:text[not(@disable-output-escaping="yes")]'];
/**
* Test whether an element is followed by a text node
*
* @param DOMElement $element
* @return bool
*/
protected function isFollowedByText(DOMElement $element)
{
return ($element->nextSibling && $element->nextSibling->nodeType === XML_TEXT_NODE);
}
/**
* Test whether an element is preceded by a text node
*
* @param DOMElement $element
* @return bool
*/
protected function isPrecededByText(DOMElement $element)
{
return ($element->previousSibling && $element->previousSibling->nodeType === XML_TEXT_NODE);
}
/**
* {@inheritdoc}
*/
protected function normalizeElement(DOMElement $element)
{
// If this node's content is whitespace, ensure it's preceded or followed by a text node
if (trim($element->textContent) === '')
{
if (!$this->isFollowedByText($element) && !$this->isPrecededByText($element))
{
// This would become inter-element whitespace, therefore we can't inline
return;
}
}
$element->parentNode->replaceChild($this->createTextNode($element->textContent), $element);
}
}