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<?php |
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namespace League\HTMLToMarkdown; |
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class Element implements ElementInterface |
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{ |
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/** |
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* @var \DOMNode |
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*/ |
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protected $node; |
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/** |
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* @var ElementInterface|null |
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*/ |
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private $nextCached; |
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public function __construct(\DOMNode $node) |
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{ |
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$this->node = $node; |
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} |
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/** |
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* @return bool |
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*/ |
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public function isBlock() |
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{ |
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switch ($this->getTagName()) { |
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case 'blockquote': |
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case 'body': |
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case 'div': |
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case 'h1': |
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case 'h2': |
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case 'h3': |
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case 'h4': |
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case 'h5': |
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case 'h6': |
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case 'hr': |
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case 'html': |
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case 'li': |
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case 'p': |
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case 'ol': |
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case 'ul': |
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return true; |
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default: |
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return false; |
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} |
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} |
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/** |
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* @return bool |
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*/ |
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public function isText() |
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{ |
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return $this->getTagName() === '#text'; |
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} |
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/** |
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* @return bool |
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*/ |
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public function isWhitespace() |
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{ |
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return $this->getTagName() === '#text' && trim($this->getValue()) === ''; |
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} |
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/** |
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* @return string |
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*/ |
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public function getTagName() |
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{ |
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return $this->node->nodeName; |
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} |
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/** |
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* @return string |
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*/ |
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public function getValue() |
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{ |
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return $this->node->nodeValue; |
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} |
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/** |
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* @return ElementInterface|null |
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*/ |
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public function getParent() |
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{ |
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return new static($this->node->parentNode) ?: null; |
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} |
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/** |
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* @return bool |
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*/ |
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public function hasChildren() |
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{ |
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return $this->node->hasChildNodes(); |
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} |
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/** |
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* @return ElementInterface[] |
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*/ |
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public function getChildren() |
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{ |
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$ret = array(); |
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/** @var \DOMNode $node */ |
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foreach ($this->node->childNodes as $node) { |
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$ret[] = new static($node); |
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} |
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return $ret; |
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} |
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/** |
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* @return ElementInterface|null |
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*/ |
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public function getNext() |
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{ |
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if ($this->nextCached === null) { |
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$nextNode = $this->getNextNode($this->node); |
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if ($nextNode !== null) { |
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$this->nextCached = new static($nextNode); |
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} |
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} |
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return $this->nextCached; |
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} |
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/** |
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* @param \DomNode $node |
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* @param bool $checkChildren |
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* |
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* @return \DomNode|null |
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*/ |
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private function getNextNode($node, $checkChildren = true) |
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{ |
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if ($checkChildren && $node->firstChild) { |
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return $node->firstChild; |
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} |
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if ($node->nextSibling) { |
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return $node->nextSibling; |
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} |
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if ($node->parentNode) { |
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return $this->getNextNode($node->parentNode, false); |
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} |
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} |
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/** |
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* @param string[]|string $tagNames |
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* |
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* @return bool |
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*/ |
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public function isDescendantOf($tagNames) |
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{ |
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if (!is_array($tagNames)) { |
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$tagNames = array($tagNames); |
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} |
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for ($p = $this->node->parentNode; $p !== false; $p = $p->parentNode) { |
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if (is_null($p)) { |
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return false; |
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} |
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if (in_array($p->nodeName, $tagNames)) { |
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return true; |
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} |
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} |
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return false; |
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} |
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/** |
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* @param string $markdown |
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*/ |
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public function setFinalMarkdown($markdown) |
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{ |
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$markdown_node = $this->node->ownerDocument->createTextNode($markdown); |
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$this->node->parentNode->replaceChild($markdown_node, $this->node); |
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} |
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/** |
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* @return string |
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*/ |
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public function getChildrenAsString() |
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{ |
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return $this->node->C14N(); |
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} |
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/** |
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* @return int |
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*/ |
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public function getSiblingPosition() |
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{ |
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$position = 0; |
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// Loop through all nodes and find the given $node |
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foreach ($this->getParent()->getChildren() as $current_node) { |
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if (!$current_node->isWhitespace()) { |
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$position++; |
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} |
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// TODO: Need a less-buggy way of comparing these |
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// Perhaps we can somehow ensure that we always have the exact same object and use === instead? |
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if ($this->equals($current_node)) { |
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break; |
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} |
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} |
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return $position; |
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} |
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/** |
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* @return int |
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*/ |
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public function getListItemLevel() |
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{ |
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$level = 0; |
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$parent = $this->getParent(); |
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while ($parent !== null && $parent->node->parentNode) { |
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if ($parent->getTagName() === 'li') { |
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$level++; |
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} |
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$parent = $parent->getParent(); |
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} |
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return $level; |
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} |
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/** |
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* @param string $name |
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* |
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* @return string |
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*/ |
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public function getAttribute($name) |
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{ |
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if ($this->node instanceof \DOMElement) { |
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return $this->node->getAttribute($name); |
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} |
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return ''; |
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} |
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/** |
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* @param ElementInterface $element |
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* |
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* @return bool |
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*/ |
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public function equals(ElementInterface $element) |
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{ |
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if ($element instanceof self) { |
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return $element->node === $this->node; |
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} |
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return $element === $this; |
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} |
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} |
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