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<?php declare(strict_types=1); |
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/** |
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* @package s9e\SweetDOM |
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* @copyright Copyright (c) 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\SweetDOM; |
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use DOMAttr; |
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use DOMCharacterData; |
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use DOMDocument; |
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use DOMDocumentFragment; |
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use DOMDocumentType; |
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use DOMElement; |
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use DOMEntity; |
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use DOMEntityReference; |
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use DOMNode; |
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use DOMNodeList; |
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use DOMNotation; |
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use DOMProcessingInstruction; |
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use DOMXPath; |
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class NodeComparator |
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{ |
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// https://dom.spec.whatwg.org/#concept-node-equals |
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// https://github.com/php/php-src/blob/master/ext/dom/node.c |
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public static function isEqualNode(?DOMNode $node, ?DOMNode $otherNode): bool |
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{ |
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if (!isset($node, $otherNode) || $node->nodeType !== $otherNode->nodeType) |
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{ |
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return false; |
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} |
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if ($node instanceof DOMElement && $otherNode instanceof DOMElement) |
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{ |
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return static::isEqualElementNode($node, $otherNode); |
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} |
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if ($node instanceof DOMCharacterData && $otherNode instanceof DOMCharacterData) |
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{ |
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// Covers DOMCdataSection, DOMComment, and DOMText |
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return $node->data === $otherNode->data; |
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} |
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if ($node instanceof DOMProcessingInstruction && $otherNode instanceof DOMProcessingInstruction) |
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{ |
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return $node->target === $otherNode->target && $node->data === $otherNode->data; |
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} |
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if ($node instanceof DOMAttr && $otherNode instanceof DOMAttr) |
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{ |
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return $node->namespaceURI === $otherNode->namespaceURI |
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&& $node->localName === $otherNode->localName |
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&& $node->value === $otherNode->value; |
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} |
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if (($node instanceof DOMDocument && $otherNode instanceof DOMDocument) |
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|| ($node instanceof DOMDocumentFragment && $otherNode instanceof DOMDocumentFragment)) |
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{ |
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return static::isEqualNodeList($node->childNodes, $otherNode->childNodes); |
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} |
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if ($node instanceof DOMDocumentType && $otherNode instanceof DOMDocumentType) |
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{ |
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return $node->name === $otherNode->name |
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&& $node->publicId === $otherNode->publicId |
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&& $node->systemId === $otherNode->systemId; |
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} |
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if ($node instanceof DOMEntityReference && $otherNode instanceof DOMEntityReference) |
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{ |
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return $node->nodeName === $otherNode->nodeName; |
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} |
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if (($node instanceof DOMEntity && $otherNode instanceof DOMEntity) |
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|| ($node instanceof DOMNotation && $otherNode instanceof DOMNotation)) |
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{ |
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return $node->nodeName === $otherNode->nodeName |
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&& $node->publicId === $otherNode->publicId |
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&& $node->systemId === $otherNode->systemId; |
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} |
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// @codeCoverageIgnoreStart |
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return $node->isSameNode($otherNode); |
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// @codeCoverageIgnoreEnd |
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} |
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/** |
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* @return array<string, string> |
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*/ |
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protected static function getNamespaceDeclarations(DOMElement $element): array |
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{ |
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$namespaces = []; |
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$xpath = new DOMXPath($element->ownerDocument); |
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foreach ($xpath->query('namespace::*', $element) as $node) |
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{ |
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if ($element->hasAttribute($node->nodeName)) |
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{ |
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$namespaces[$node->nodeName] = $node->nodeValue; |
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} |
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} |
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return $namespaces; |
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} |
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protected static function hasEqualNamespaceDeclarations(DOMElement $element, DOMElement $otherElement): bool |
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{ |
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return static::getNamespaceDeclarations($element) == static::getNamespaceDeclarations($otherElement); |
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} |
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protected static function isEqualElementNode(DOMElement $element, DOMElement $otherElement): bool |
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{ |
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if ($element->namespaceURI !== $otherElement->namespaceURI |
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|| $element->nodeName !== $otherElement->nodeName |
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|| $element->attributes->length !== $otherElement->attributes->length |
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|| $element->childNodes->length !== $otherElement->childNodes->length) |
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{ |
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return false; |
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} |
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foreach ($element->attributes as $attribute) |
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{ |
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if ($attribute->value !== $otherElement->attributes->getNamedItem($attribute->name)?->value) |
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{ |
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return false; |
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} |
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} |
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return static::isEqualNodeList($element->childNodes, $otherElement->childNodes) |
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&& static::hasEqualNamespaceDeclarations($element, $otherElement); |
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} |
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protected static function isEqualNodeList(DOMNodeList $list, DOMNodeList $otherList): bool |
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{ |
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if ($list->length !== $otherList->length) |
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{ |
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return false; |
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} |
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foreach ($list as $i => $node) |
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{ |
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if (!static::isEqualNode($node, $otherList->item($i))) |
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{ |
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return false; |
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} |
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} |
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return true; |
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} |
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} |
s9e /
SweetDOM
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