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Allow certain style tags on spans.

semantics-font
Frode Petterson 2015-05-08 16:06:04 +02:00
parent ccc03782df
commit e404c3ac68
1 changed files with 20 additions and 2 deletions
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22
h5p.classes.php
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@ -2474,6 +2474,7 @@ class H5PContentValidator {
if (in_array('del', $tags) || in_array('strike', $tags) && ! in_array('s', $tags)) {
$tags[] = 's';
}
// Strip invalid HTML tags.
$text = $this->filter_xss($text, $tags);
}
@ -3002,7 +3003,7 @@ class H5PContentValidator {
$xhtml_slash = $count ? ' /' : '';
// Clean up attributes.
$attr2 = implode(' ', $this->_filter_xss_attributes($attrlist));
$attr2 = implode(' ', $this->_filter_xss_attributes($attrlist, $elem === 'span'));
$attr2 = preg_replace('/[<>]/', '', $attr2);
$attr2 = strlen($attr2) ? ' ' . $attr2 : '';
@ -3015,7 +3016,7 @@ class H5PContentValidator {
* @return
* Cleaned up version of the HTML attributes.
*/
private function _filter_xss_attributes($attr) {
private function _filter_xss_attributes($attr, $allowStyles = FALSE) {
$attrarr = array();
$mode = 0;
$attrname = '';
@ -3055,6 +3056,23 @@ class H5PContentValidator {
case 2:
// Attribute value, a URL after href= for instance.
if (preg_match('/^"([^"]*)"(\s+|$)/', $attr, $match)) {
if ($allowStyles && $attrname === 'style') {
// Allow certain styles
$patterns = array(
'/^font-size: *[0-9.]+(em|px|%) *;?$/i',
'/^font-family: *[a-z0-9," ]+;?$/i',
'/^color: *(#[a-f0-9]{3}[a-f0-9]{3}?|rgba?\([0-9, ]+\)) *;?$/i',
'/^background-color: *(#[a-f0-9]{3}[a-f0-9]{3}?|rgba?\([0-9, ]+\)) *;?$/i',
);
foreach ($patterns as $pattern) {
if (preg_match($pattern, $match[1])) {
$attrarr[] = 'style="' . $match[1] . '"';
}
}
break;
}
$thisval = $this->filter_xss_bad_protocol($match[1]);
if (!$skip) {