friendica/vendor/ezyang/htmlpurifier/library/HTMLPurifier/AttrTransform/ImgRequired.php

49 lines
1.4 KiB
PHP
Raw Normal View History

2010-09-09 05:14:17 +02:00
<?php
// must be called POST validation
/**
* Transform that supplies default values for the src and alt attributes
* in img tags, as well as prevents the img tag from being removed
* because of a missing alt tag. This needs to be registered as both
* a pre and post attribute transform.
*/
class HTMLPurifier_AttrTransform_ImgRequired extends HTMLPurifier_AttrTransform
{
2016-02-09 11:06:17 +01:00
/**
* @param array $attr
* @param HTMLPurifier_Config $config
* @param HTMLPurifier_Context $context
* @return array
*/
public function transform($attr, $config, $context)
{
2010-09-09 05:14:17 +02:00
$src = true;
if (!isset($attr['src'])) {
2016-02-09 11:06:17 +01:00
if ($config->get('Core.RemoveInvalidImg')) {
return $attr;
}
2010-09-09 05:14:17 +02:00
$attr['src'] = $config->get('Attr.DefaultInvalidImage');
$src = false;
}
if (!isset($attr['alt'])) {
if ($src) {
$alt = $config->get('Attr.DefaultImageAlt');
if ($alt === null) {
// truncate if the alt is too long
2016-02-09 11:06:17 +01:00
$attr['alt'] = substr(basename($attr['src']), 0, 40);
2010-09-09 05:14:17 +02:00
} else {
$attr['alt'] = $alt;
}
} else {
$attr['alt'] = $config->get('Attr.DefaultInvalidImageAlt');
}
}
return $attr;
}
}
// vim: et sw=4 sts=4