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