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Deal with old libxml incompatibilities.

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Signed-off-by: Edward Z. Yang <ezyang@cs.stanford.edu>
This commit is contained in:
Edward Z. Yang 2017-12-22 21:47:17 -05:00 committed by Edward Z. Yang
parent 67c3798922
commit 64baeda65c
1 changed files with 47 additions and 10 deletions
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57
library/HTMLPurifier/Lexer/DOMLex.php
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@ -126,6 +126,41 @@ class HTMLPurifier_Lexer_DOMLex extends HTMLPurifier_Lexer
} while ($level > 0);
}
/**
* Portably retrieve the tag name of a node; deals with older versions
* of libxml like 2.7.6
* @param DOMNode $node
*/
protected function getTagName($node)
{
if (property_exists($node, 'tagName')) {
return $node->tagName;
} else if (property_exists($node, 'nodeName')) {
return $node->nodeName;
} else if (property_exists($node, 'localName')) {
return $node->localName;
}
return null;
}
/**
* Portably retrieve the data of a node; deals with older versions
* of libxml like 2.7.6
* @param DOMNode $node
*/
protected function getData($node)
{
if (property_exists($node, 'data')) {
return $node->data;
} else if (property_exists($node, 'nodeValue')) {
return $node->nodeValue;
} else if (property_exists($node, 'textContent')) {
return $node->textContent;
}
return null;
}
/**
* @param DOMNode $node DOMNode to be tokenized.
* @param HTMLPurifier_Token[] $tokens Array-list of already tokenized tokens.
@ -141,7 +176,10 @@ class HTMLPurifier_Lexer_DOMLex extends HTMLPurifier_Lexer
// but we're not getting the character reference nodes because
// those should have been preprocessed
if ($node->nodeType === XML_TEXT_NODE) {
$tokens[] = $this->factory->createText($node->data);
$data = $this->getData($node); // Handle variable data property
if ($data !== null) {
$tokens[] = $this->factory->createText($data);
}
return false;
} elseif ($node->nodeType === XML_CDATA_SECTION_NODE) {
// undo libxml's special treatment of <script> and <style> tags
@ -171,21 +209,20 @@ class HTMLPurifier_Lexer_DOMLex extends HTMLPurifier_Lexer
// not-well tested: there may be other nodes we have to grab
return false;
}
$attr = $node->hasAttributes() ? $this->transformAttrToAssoc($node->attributes) : array();
$tag_name = $this->getTagName($node); // Handle variable tagName property
if (empty($tag_name)) {
return (bool) $node->childNodes->length;
}
// We still have to make sure that the element actually IS empty
if (!$node->childNodes->length) {
if ($collect) {
$tokens[] = $this->factory->createEmpty($node->tagName, $attr);
$tokens[] = $this->factory->createEmpty($tag_name, $attr);
}
return false;
} else {
if ($collect) {
$tokens[] = $this->factory->createStart(
$tag_name = $node->tagName, // somehow, it get's dropped
$attr
);
$tokens[] = $this->factory->createStart($tag_name, $attr);
}
return true;
}
@ -197,10 +234,10 @@ class HTMLPurifier_Lexer_DOMLex extends HTMLPurifier_Lexer
*/
protected function createEndNode($node, &$tokens)
{
$tokens[] = $this->factory->createEnd($node->tagName);
$tag_name = $this->getTagName($node); // Handle variable tagName property
$tokens[] = $this->factory->createEnd($tag_name);
}
/**
* Converts a DOMNamedNodeMap of DOMAttr objects into an assoc array.
*