Move HTML to Markdown library to Composer

vendor/league/html-to-markdown/src/Element.php

@@ -0,0 +1,257 @@
+<?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;
+    }
+}