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<?php namespace AmpProject; use AmpProject\Dom\Document; use DOMDocument; use DOMElement; use DOMNode; /** * Helper functionality to deal with AMP dev-mode. * * @link https://github.com/ampproject/amphtml/issues/20974 * * @package ampproject/common */ final class DevMode { /** * Attribute name for AMP dev mode. * * @var string */ const DEV_MODE_ATTRIBUTE = 'data-ampdevmode'; /** * Check whether the provided document is in dev mode. * * @param DOMDocument $document Document for which to check whether dev mode is active. * @return bool Whether the document is in dev mode. */ public static function isActiveForDocument(DOMDocument $document) { if (! $document instanceof Document) { $document = Document::fromNode($document); } return $document->documentElement->hasAttribute(self::DEV_MODE_ATTRIBUTE); } /** * Check whether a node is exempt from validation during dev mode. * * @param DOMNode $node Node to check. * @return bool Whether the node should be exempt during dev mode. */ public static function hasExemptionForNode(DOMNode $node) { if (! $node instanceof DOMElement) { return false; } $document = self::getDocument($node); if ($node === $document->documentElement) { return $document->hasInitialAmpDevMode(); } return $node->hasAttribute(self::DEV_MODE_ATTRIBUTE); } /** * Check whether a certain node should be exempt from validation. * * @param DOMNode $node Node to check. * @return bool Whether the node should be exempt from validation. */ public static function isExemptFromValidation(DOMNode $node) { $document = self::getDocument($node); return self::isActiveForDocument($document) && self::hasExemptionForNode($node); } /** * Get the document from the specified node. * * @param DOMNode $node * @return Document */ private static function getDocument(DOMNode $node) { $document = $node->ownerDocument; if (! $document instanceof Document) { $document = Document::fromNode($node); } return $document; } }
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