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<?php
/**
* Copyright © Magento, Inc. All rights reserved.
* See COPYING.txt for license details.
*/
namespace Magento\Developer\Model\Tools;
class Formatter
{
/**
* @var string
*/
private $_indent;
/**
* @param string $indent
*/
public function __construct($indent = " ")
{
$this->_indent = $indent;
}
/**
* Return a well-formatted XML string
*
* @param string $xmlString
* @return string
*/
public function format($xmlString)
{
$xmlDom = new \DOMDocument('1.0');
$xmlDom->formatOutput = true;
$xmlDom->preserveWhiteSpace = false;
$xmlDom->loadXML($xmlString);
// replace text in the document with unique placeholders
$placeholders = [];
$xmlXpath = new \DOMXPath($xmlDom);
/** @var DOMNode $textNode */
foreach ($xmlXpath->query('//text() | //comment() | //@*') as $textNode) {
$placeholder = \spl_object_hash($textNode);
$placeholders[$placeholder] = $textNode->textContent;
$textNode->nodeValue = $placeholder;
}
// render formatted XML structure
$result = $xmlDom->saveXML();
// replace the default 2-space indents
$indent = $this->_indent;
$result = \preg_replace_callback(
'/^(?:\s{2})+/m',
function (array $matches) use ($indent) {
$indentCount = \strlen($matches[0]) >> 1;
return \str_repeat($indent, $indentCount);
},
$result
);
// replace placeholders with values
$result = \str_replace(\array_keys($placeholders), \array_values($placeholders), $result);
return $result;
}
}