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<?php |
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/** |
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* Copyright (c) 2017–2018 Ryan Parman <http://ryanparman.com>. |
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* Copyright (c) 2017–2018 Contributors. |
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* |
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* http://opensource.org/licenses/Apache2.0 |
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*/ |
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declare(strict_types=1); |
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namespace SimplePie\Type; |
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use DOMAttr; |
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use DOMNode; |
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use DOMText; |
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use SimplePie\Enum\CharacterSet; |
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use SimplePie\Enum\Serialization; |
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use SimplePie\Exception\SimplePieException; |
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/** |
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* A type model for a deep-level Node element. |
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*/ |
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class Node extends AbstractType implements NodeInterface, TypeInterface |
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{ |
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/** |
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* The raw `DOMNode` element. |
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* |
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* @var DOMNode|null |
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*/ |
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protected $node; |
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/** |
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* The content of the node, serialized appropriately. |
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* |
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* @var string|null |
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*/ |
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protected $value; |
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/** |
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* The language of the content. |
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* |
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* @var string|null |
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*/ |
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protected $lang; |
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/** |
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* The xml:base value of the content. |
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* |
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* @var string|null |
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*/ |
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protected $base; |
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/** |
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* The serialization of the content. |
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* |
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* @var string |
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*/ |
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protected $serialization = Serialization::TEXT; |
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/** |
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* Get the text node in multiple formats. |
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* |
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* @param DOMNode|null $node A `DOMNode` element to read properties from. |
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* @param array $fallback An array of attributes for default XML attributes. The default value is an |
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* empty array. |
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*/ |
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public function __construct(?DOMNode $node = null, array $fallback = []) |
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{ |
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if ($node) { |
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$this->node = $node; |
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$this->value = $node->nodeValue; |
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// Set some default values |
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$this->handleFallback($fallback); |
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if (XML_ELEMENT_NODE === $node->nodeType && $node->attributes->length > 0) { |
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foreach ($node->attributes as $attribute) { |
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$this->overrideXmlAttrs($attribute); |
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$this->handleTypes($attribute); |
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} |
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} |
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} |
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} |
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/** |
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* Casting this Node element to a string with return the _value_ of the Node. |
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* |
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* @return string |
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*/ |
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public function __toString(): string |
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{ |
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return $this->getValue() ?? ''; |
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} |
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/** |
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* Creates a new `Node` object from a string of text (such as from an XML attribute). |
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* |
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* @param string $value The string of text to convert to a `Node` object. |
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* |
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* @return Node |
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*/ |
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public static function factory(string $value): self |
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{ |
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return new self( |
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new DOMText($value) |
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); |
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} |
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/** |
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* Gets the raw `DOMNode` element. |
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* |
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* @return DOMNode|null |
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*/ |
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public function getNode(): ?DOMNode |
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{ |
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return $this->node; |
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} |
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/** |
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* Gets the content of the node, serialized appropriately. |
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* |
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* @return string|null |
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*/ |
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public function getValue(): ?string |
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{ |
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return $this->value; |
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} |
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/** |
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* Gets the serialization of the content. |
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* |
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* Will always be one of the enums from `SimplePie\Enum\Serialization`. |
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* |
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* @return string |
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*/ |
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public function getSerialization(): string |
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{ |
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return $this->serialization; |
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} |
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/** |
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* Gets the language of the content. |
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* |
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* @return string|null |
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*/ |
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public function getLang(): self |
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{ |
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return self::factory($this->lang ?? ''); |
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} |
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/** |
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* Gets the xml:base of the content. |
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* |
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* @return string|null |
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*/ |
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public function getBase(): self |
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{ |
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return self::factory($this->base ?? ''); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function getAlias(string $nodeName): string |
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{ |
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switch ($nodeName) { |
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case 'language': |
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return 'lang'; |
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default: |
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return $nodeName; |
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} |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function getHandler(string $nodeName, array $args = []): self |
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{ |
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throw new SimplePieException( |
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$this->getUnresolvableMessage($nodeName) |
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); |
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} |
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/** |
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* Override the `xml:`-prefixed values inherited from the parent with local values. |
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* |
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* @param DOMAttr $attribute A `DOMAttr` element to read properties from. |
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*/ |
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private function overrideXmlAttrs(DOMAttr $attribute): void |
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{ |
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if ('xml:base' === $attribute->nodeName) { |
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$this->base = $attribute->nodeValue; |
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} elseif ('xml:lang' === $attribute->nodeName) { |
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$this->lang = $attribute->nodeValue; |
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} |
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} |
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/** |
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* Determine how a serialized node should be handled. |
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* |
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* @param DOMAttr $attribute A `DOMAttr` element to read properties from. |
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*/ |
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private function handleTypes(DOMAttr $attribute): void |
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{ |
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if ('src' === $attribute->name) { |
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$this->handleAsSource($attribute); |
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} elseif ('type' === $attribute->name && Serialization::TEXT === $attribute->value) { |
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$this->handleAsText($node, $attribute); |
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} elseif ('type' === $attribute->name && Serialization::HTML === $attribute->value) { |
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$this->handleAsHtml($node, $attribute); |
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} elseif ('type' === $attribute->name && Serialization::XHTML === $attribute->value) { |
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$this->handleAsXhtml($node, $attribute); |
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} elseif ('type' === $attribute->name && 'application/octet-stream' === $attribute->value) { |
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$this->handleAsBase64($node); |
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} else { |
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$this->serialization = Serialization::TEXT; |
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$this->value = $node->nodeValue; |
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} |
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} |
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/** |
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* Handle the default "fallback" state of certain properties. |
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* |
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* @param array $fallback An array of attributes for default XML attributes. The default value is an empty array. |
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*/ |
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private function handleFallback(array $fallback = []): void |
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{ |
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if (isset($fallback['base'])) { |
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$this->base = $fallback['base']->nodeValue; |
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} |
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if (isset($fallback['lang'])) { |
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$this->lang = $fallback['lang']->nodeValue; |
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} |
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} |
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/** |
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* Handle the content as source. |
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* |
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* @param DOMAttr $attribute The DOMAttr element. |
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*/ |
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private function handleAsSource(DOMAttr $attribute): void |
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{ |
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$this->serialization = Serialization::TEXT; |
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$this->value = $attribute->nodeValue; |
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} |
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/** |
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* Handle the content as plain text. |
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* |
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* @param DOMNode $node The DOMNode element. |
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* @param DOMAttr $attribute The DOMAttr element. |
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*/ |
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private function handleAsText(DOMNode $node, DOMAttr $attribute): void |
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{ |
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$this->serialization = $attribute->nodeValue; |
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$this->value = \html_entity_decode( |
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$node->nodeValue, |
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ENT_COMPAT, |
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CharacterSet::UTF_8 |
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); |
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} |
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/** |
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* Handle the content as HTML. |
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* |
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* @param DOMNode $node The DOMNode element. |
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* @param DOMAttr $attribute The DOMAttr element. |
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*/ |
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private function handleAsHtml(DOMNode $node, DOMAttr $attribute): void |
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{ |
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$this->serialization = $attribute->nodeValue; |
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$this->value = \html_entity_decode( |
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$node->nodeValue, |
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ENT_COMPAT | ENT_HTML5, |
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CharacterSet::UTF_8 |
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); |
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} |
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/** |
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* Handle the content as XHTML. |
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* |
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* @param DOMNode $node The DOMNode element. |
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* @param DOMAttr $attribute The DOMAttr element. |
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*/ |
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private function handleAsXhtml(DOMNode $node, DOMAttr $attribute): void |
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{ |
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$this->serialization = $attribute->nodeValue; |
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// We can't just grab the content. We need to stringify it, then remove the wrapper element. |
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$content = \preg_replace( |
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'/^<div xmlns=\"http:\/\/www.w3.org\/1999\/xhtml\">(.*)<\/div>$/ims', |
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'$1', |
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$node->ownerDocument->saveXML( |
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$node->getElementsByTagNameNS('http://www.w3.org/1999/xhtml', 'div')[0] |
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) |
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); |
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$this->value = \trim($content); |
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} |
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/** |
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* Handle the content as Base64-encoded text. |
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* |
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* @param DOMNode $node The DOMNode element. |
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*/ |
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private function handleAsBase64(DOMNode $node): void |
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{ |
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$this->serialization = Serialization::TEXT; |
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$this->value = \base64_decode(\trim($node->nodeValue), true); |
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} |
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} |
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