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<?php declare(strict_types=1); |
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/** |
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* @package s9e\TextFormatter |
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* @copyright Copyright (c) 2010-2020 The s9e authors |
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* @license http://www.opensource.org/licenses/mit-license.php The MIT License |
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*/ |
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namespace s9e\TextFormatter\Configurator\TemplateChecks; |
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use DOMElement; |
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use DOMXPath; |
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use RuntimeException; |
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use s9e\TextFormatter\Configurator\Helpers\AVTHelper; |
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use s9e\TextFormatter\Configurator\Items\Tag; |
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use s9e\TextFormatter\Configurator\TemplateCheck; |
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abstract class AbstractXSLSupportCheck extends TemplateCheck |
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{ |
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/** |
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* @var string[] List of supported XSL elements (local name only) |
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*/ |
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protected $supportedElements = []; |
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/** |
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* @var string[] List of supported XPath functions |
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*/ |
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protected $supportedFunctions = []; |
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/** |
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* @var string[] List of supported XPath operators |
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*/ |
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protected $supportedOperators = ['and', 'div', 'mod', 'or']; |
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/** |
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* Check for elements not supported by the PHP renderer |
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* |
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* @param DOMElement $template <xsl:template/> node |
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* @param Tag $tag Tag this template belongs to |
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*/ |
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public function check(DOMElement $template, Tag $tag): void |
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{ |
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$this->checkXslElements($template); |
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$this->checkXPathExpressions($template); |
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} |
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/** |
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* Check given XPath expression |
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*/ |
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protected function checkXPathExpression(string $expr): void |
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{ |
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preg_match_all('("[^"]*+"|\'[^\']*+\'|((?:[a-z]++-)*+[a-z]++)(?=\\s*\\())', $expr, $m); |
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foreach (array_filter($m[1]) as $funcName) |
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{ |
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if (!in_array($funcName, $this->supportedFunctions, true) |
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&& !in_array($funcName, $this->supportedOperators, true)) |
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{ |
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throw new RuntimeException('XPath function ' . $funcName . '() is not supported'); |
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} |
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} |
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} |
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/** |
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* Check all XPath expressions in given template |
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*/ |
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protected function checkXPathExpressions(DOMElement $template): void |
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{ |
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foreach ($this->getXPathExpressions($template) as $expr) |
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{ |
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$this->checkXPathExpression($expr); |
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} |
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} |
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/** |
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* Check all XSL elements in given template |
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*/ |
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protected function checkXslElements(DOMElement $template): void |
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{ |
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$xpath = new DOMXPath($template->ownerDocument); |
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$nodes = $xpath->query('/xsl:template//xsl:*'); |
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foreach ($nodes as $node) |
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{ |
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if (!in_array($node->localName, $this->supportedElements, true)) |
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{ |
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throw new RuntimeException('xsl:' . $node->localName . ' elements are not supported'); |
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} |
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$methodName = 'checkXsl' . str_replace(' ', '', ucwords(str_replace('-', ' ', $node->localName))) . 'Element'; |
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if (method_exists($this, $methodName)) |
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{ |
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$this->$methodName($node); |
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} |
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} |
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} |
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/** |
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* Return all XPath expressions in given template |
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*/ |
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protected function getXPathExpressions(DOMElement $template): array |
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{ |
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$exprs = []; |
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$xpath = new DOMXPath($template->ownerDocument); |
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$query = '//xsl:*/@name | //*[namespace-uri() != "' . self::XMLNS_XSL . '"]/@*[contains(., "{")]'; |
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foreach ($xpath->query($query) as $attribute) |
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{ |
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foreach (AVTHelper::parse($attribute->value) as [$type, $content]) |
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{ |
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if ($type === 'expression') |
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{ |
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$exprs[] = $content; |
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} |
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} |
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} |
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$query = '//xsl:*/@select | //xsl:*/@test'; |
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foreach ($xpath->query($query) as $attribute) |
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{ |
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$exprs[] = $attribute->value; |
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} |
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return $exprs; |
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} |
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} |
s9e /
TextFormatter
