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<?php
declare(strict_types=1);
namespace League\HTMLToMarkdown;
class Element implements ElementInterface
{
/** @var \DOMNode */
protected $node;
/** @var ElementInterface|null */
private $nextCached;
/** @var \DOMNode|null */
private $previousSiblingCached;
public function __construct(\DOMNode $node)
{
$this->node = $node;
$this->previousSiblingCached = $this->node->previousSibling;
}
public function isBlock(): bool
{
switch ($this->getTagName()) {
case 'blockquote':
case 'body':
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;
}
}
public function isText(): bool
{
return $this->getTagName() === '#text';
}
public function isWhitespace(): bool
{
return $this->getTagName() === '#text' && \trim($this->getValue()) === '';
}
public function getTagName(): string
{
return $this->node->nodeName;
}
public function getValue(): string
{
return $this->node->nodeValue ?? '';
}
public function hasParent(): bool
{
return $this->node->parentNode !== null;
}
public function getParent(): ?ElementInterface
{
return $this->node->parentNode ? new self($this->node->parentNode) : null;
}
public function getNextSibling(): ?ElementInterface
{
return $this->node->nextSibling !== null ? new self($this->node->nextSibling) : null;
}
public function getPreviousSibling(): ?ElementInterface
{
return $this->previousSiblingCached !== null ? new self($this->previousSiblingCached) : null;
}
public function hasChildren(): bool
{
return $this->node->hasChildNodes();
}
/**
* @return ElementInterface[]
*/
public function getChildren(): array
{
$ret = [];
foreach ($this->node->childNodes as $node) {
/** @psalm-suppress RedundantCondition */
\assert($node instanceof \DOMNode);
$ret[] = new self($node);
}
return $ret;
}
public function getNext(): ?ElementInterface
{
if ($this->nextCached === null) {
$nextNode = $this->getNextNode($this->node);
if ($nextNode !== null) {
$this->nextCached = new self($nextNode);
}
}
return $this->nextCached;
}
private function getNextNode(\DOMNode $node, bool $checkChildren = true): ?\DOMNode
{
if ($checkChildren && $node->firstChild) {
return $node->firstChild;
}
if ($node->nextSibling) {
return $node->nextSibling;
}
if ($node->parentNode) {
return $this->getNextNode($node->parentNode, false);
}
return null;
}
/**
* @param string[]|string $tagNames
*/
public function isDescendantOf($tagNames): bool
{
if (! \is_array($tagNames)) {
$tagNames = [$tagNames];
}
for ($p = $this->node->parentNode; $p !== null; $p = $p->parentNode) {
if (\in_array($p->nodeName, $tagNames, true)) {
return true;
}
}
return false;
}
public function setFinalMarkdown(string $markdown): void
{
if ($this->node->ownerDocument === null) {
throw new \RuntimeException('Unowned node');
}
if ($this->node->parentNode === null) {
throw new \RuntimeException('Cannot setFinalMarkdown() on a node without a parent');
}
$markdownNode = $this->node->ownerDocument->createTextNode($markdown);
$this->node->parentNode->replaceChild($markdownNode, $this->node);
}
public function getChildrenAsString(): string
{
return $this->node->C14N();
}
public function getSiblingPosition(): int
{
$position = 0;
$parent = $this->getParent();
if ($parent === null) {
return $position;
}
// Loop through all nodes and find the given $node
foreach ($parent->getChildren() as $currentNode) {
if (! $currentNode->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($currentNode)) {
break;
}
}
return $position;
}
public function getListItemLevel(): int
{
$level = 0;
$parent = $this->getParent();
while ($parent !== null && $parent->hasParent()) {
if ($parent->getTagName() === 'li') {
$level++;
}
$parent = $parent->getParent();
}
return $level;
}
public function getAttribute(string $name): string
{
if ($this->node instanceof \DOMElement) {
return $this->node->getAttribute($name);
}
return '';
}
public function equals(ElementInterface $element): bool
{
if ($element instanceof self) {
return $element->node === $this->node;
}
return false;
}
}
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