mirror of
https://github.com/renbaoshuo/S2OJ.git
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96d4a3ecf7
Due to historical reasons, the code is in subfolder "1". With SVN removal, we place the code back and remove the annoying "1" folder.
49 lines
1.4 KiB
PHP
49 lines
1.4 KiB
PHP
<?php
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// must be called POST validation
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/**
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* Transform that supplies default values for the src and alt attributes
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* in img tags, as well as prevents the img tag from being removed
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* because of a missing alt tag. This needs to be registered as both
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* a pre and post attribute transform.
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*/
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class HTMLPurifier_AttrTransform_ImgRequired extends HTMLPurifier_AttrTransform
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{
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/**
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* @param array $attr
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* @param HTMLPurifier_Config $config
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* @param HTMLPurifier_Context $context
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* @return array
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*/
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public function transform($attr, $config, $context)
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{
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$src = true;
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if (!isset($attr['src'])) {
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if ($config->get('Core.RemoveInvalidImg')) {
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return $attr;
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}
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$attr['src'] = $config->get('Attr.DefaultInvalidImage');
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$src = false;
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}
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if (!isset($attr['alt'])) {
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if ($src) {
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$alt = $config->get('Attr.DefaultImageAlt');
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if ($alt === null) {
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// truncate if the alt is too long
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$attr['alt'] = substr(basename($attr['src']), 0, 40);
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} else {
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$attr['alt'] = $alt;
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}
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} else {
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$attr['alt'] = $config->get('Attr.DefaultInvalidImageAlt');
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}
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}
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return $attr;
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}
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}
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// vim: et sw=4 sts=4
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