private function _prefix_keyframe(css_group $keyframe, $apply_list)
{
$prefixes = array(3 => "@-ms-keyframes", 2 => "@-o-keyframes", 0 => "@-moz-keyframes", 1 => "@-webkit-keyframes");
foreach ($prefixes as $id => $value) {
if (isset($apply_list[$id]) && $apply_list[$id]) {
$new_name = str_replace('@keyframes', $prefixes[$id], $keyframe->name);
//Check if keyframe with prefix exists
$found = false;
foreach ($keyframe->siblings('css_group') as $sibling) {
if ($sibling->name == $new_name) {
$found = true;
}
}
if (!$found) {
//Create new keyframe only with prefix for the current vendor
$new_keyframe = $keyframe->make_clone();
$new_keyframe->name = $new_name;
$keyframe->insert_after($new_keyframe);
$this->_add_prefixes($new_keyframe, array($id => true), true, true);
}
}
}
}