mirror of
https://github.com/ezyang/htmlpurifier.git
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68 lines
2.9 KiB
PHP
68 lines
2.9 KiB
PHP
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<?php
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HTMLPurifier_ConfigSchema::define(
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'HTML', 'AllowedElements', null, 'lookup/null',
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'If HTML Purifier\'s tag set is unsatisfactory for your needs, you '.
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'can overload it with your own list of tags to allow. Note that this '.
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'method is subtractive: it does its job by taking away from HTML Purifier '.
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'usual feature set, so you cannot add a tag that HTML Purifier never '.
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'supported in the first place (like embed, form or head). If you change this, you '.
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'probably also want to change %HTML.AllowedAttributes. '.
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'<strong>Warning:</strong> If another directive conflicts with the '.
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'elements here, <em>that</em> directive will win and override. '.
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'This directive has been available since 1.3.0.'
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);
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HTMLPurifier_ConfigSchema::define(
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'HTML', 'AllowedAttributes', null, 'lookup/null',
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'IF HTML Purifier\'s attribute set is unsatisfactory, overload it! '.
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'The syntax is \'tag.attr\' or \'*.attr\' for the global attributes '.
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'(style, id, class, dir, lang, xml:lang).'.
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'<strong>Warning:</strong> If another directive conflicts with the '.
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'elements here, <em>that</em> directive will win and override. For '.
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'example, %HTML.EnableAttrID will take precedence over *.id in this '.
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'directive. You must set that directive to true before you can use '.
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'IDs at all. This directive has been available since 1.3.0.'
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);
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/**
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* Proprietary module that further narrows down allowed elements and
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* attributes that were allowed to a user-defined whitelist.
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* @warning This module cannot ADD elements or attributes, you must
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* implement full definitions yourself!
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*/
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class HTMLPurifier_HTMLModule_TweakSubtractiveWhitelist extends HTMLPurifier_HTMLModule
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{
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function postProcess(&$definition) {
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// setup allowed elements, SubtractiveWhitelist module
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$allowed_elements = $definition->config->get('HTML', 'AllowedElements');
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if (is_array($allowed_elements)) {
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foreach ($definition->info as $name => $d) {
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if(!isset($allowed_elements[$name])) unset($definition->info[$name]);
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}
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}
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$allowed_attributes = $definition->config->get('HTML', 'AllowedAttributes');
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if (is_array($allowed_attributes)) {
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foreach ($definition->info_global_attr as $attr_key => $info) {
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if (!isset($allowed_attributes["*.$attr_key"])) {
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unset($definition->info_global_attr[$attr_key]);
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}
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}
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foreach ($definition->info as $tag => $info) {
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foreach ($info->attr as $attr => $attr_info) {
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if (!isset($allowed_attributes["$tag.$attr"]) &&
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!isset($allowed_attributes["*.$attr"])) {
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unset($definition->info[$tag]->attr[$attr]);
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}
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}
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}
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}
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}
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}
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?>
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