Merge branch 'MDL-61052-35' of git://github.com/damyon/moodle into MOODLE_35_STABLE

David Monllao · David Monllao · commit f9f8edce1d6e · 2018-10-22T14:37:33.000+02:00
diff --git a/mod/assign/feedback/editpdf/classes/document_services.php b/mod/assign/feedback/editpdf/classes/document_services.php
@@ -120,22 +120,22 @@ private static function hash($assignment, $userid, $attemptnumber) {
      * @return string New html with no image tags.
      */
     protected static function strip_images($html) {
+        // Load HTML and suppress any parsing errors (DOMDocument->loadHTML() does not current support HTML5 tags).
         $dom = new DOMDocument();
-        $dom->loadHTML("<?xml version=\"1.0\" encoding=\"UTF-8\" ?>" . $html);
-        $images = $dom->getElementsByTagName('img');
-        $i = 0;
-
-        for ($i = ($images->length - 1); $i >= 0; $i--) {
-            $node = $images->item($i);
-
-            if ($node->hasAttribute('alt')) {
-                $replacement = ' [ ' . $node->getAttribute('alt') . ' ] ';
-            } else {
-                $replacement = ' ';
+        libxml_use_internal_errors(true);
+        $dom->loadHTML('<?xml version="1.0" encoding="UTF-8" ?>' . $html);
+        libxml_clear_errors();
+
+        // Find all img tags.
+        if ($imgnodes = $dom->getElementsByTagName('img')) {
+            // Replace img nodes with the img alt text without overriding DOM elements.
+            for ($i = ($imgnodes->length - 1); $i >= 0; $i--) {
+                $imgnode = $imgnodes->item($i);
+                $alt = ($imgnode->hasAttribute('alt')) ? ' [ ' . $imgnode->getAttribute('alt') . ' ] ' : ' ';
+                $textnode = $dom->createTextNode($alt);
+
+                $imgnode->parentNode->replaceChild($textnode, $imgnode);
             }
-
-            $text = $dom->createTextNode($replacement);
-            $node->parentNode->replaceChild($text, $node);
         }
         $count = 1;
         return str_replace("<?xml version=\"1.0\" encoding=\"UTF-8\" ?>", "", $dom->saveHTML(), $count);
diff --git a/mod/assign/submission/onlinetext/locallib.php b/mod/assign/submission/onlinetext/locallib.php
@@ -398,10 +398,9 @@ public function get_files(stdClass $submission, stdClass $user) {
         // Note that this check is the same logic as the result from the is_empty function but we do
         // not call it directly because we already have the submission record.
         if ($onlinetextsubmission && !empty($onlinetextsubmission->onlinetext)) {
-            $finaltext = $this->assignment->download_rewrite_pluginfile_urls($onlinetextsubmission->onlinetext, $user, $this);
-            $formattedtext = format_text($finaltext,
-                                         $onlinetextsubmission->onlineformat,
-                                         array('context'=>$this->assignment->get_context()));
+            // Do not pass the text through format_text. The result may not be displayed in Moodle and
+            // may be passed to external services such as document conversion or portfolios.
+            $formattedtext = $this->assignment->download_rewrite_pluginfile_urls($onlinetextsubmission->onlinetext, $user, $this);
             $head = '<head><meta charset="UTF-8"></head>';
             $submissioncontent = '<!DOCTYPE html><html>' . $head . '<body>'. $formattedtext . '</body></html>';
 
