1 files changed, 47 insertions, 10 deletions

diff --git a/vendor/ezyang/htmlpurifier/library/HTMLPurifier/Lexer/DOMLex.php b/vendor/ezyang/htmlpurifier/library/HTMLPurifier/Lexer/DOMLex.php
index 22ab5820c..6238a99e3 100644
--- a/vendor/ezyang/htmlpurifier/library/HTMLPurifier/Lexer/DOMLex.php
+++ b/vendor/ezyang/htmlpurifier/library/HTMLPurifier/Lexer/DOMLex.php
@@ -127,6 +127,41 @@ class HTMLPurifier_Lexer_DOMLex extends HTMLPurifier_Lexer
     }
 
     /**
+     * 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.
      * @param bool $collect  Says whether or start and close are collected, set to
@@ -141,7 +176,10 @@ class HTMLPurifier_Lexer_DOMLex extends HTMLPurifier_Lexer
         // but we're not getting the character reference nodes because
         // those should have been preprocessed
         if ($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.
      *