mirror of
https://github.com/ezyang/htmlpurifier.git
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bb8b38b1e0
git-svn-id: http://htmlpurifier.org/svnroot/htmlpurifier/trunk@721 48356398-32a2-884e-a903-53898d9a118a
121 lines
4.0 KiB
PHP
121 lines
4.0 KiB
PHP
<?php
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require_once 'HTMLPurifier/AttrTypes.php';
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require_once 'HTMLPurifier/AttrDef/Lang.php';
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/**
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* Defines common attribute collections that modules reference
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*/
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class HTMLPurifier_AttrCollections
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{
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/**
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* Associative array of attribute collections, indexed by name
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* @note Technically, the composition of these is more complicated,
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* but we bypass it using our own excludes property
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*/
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var $info = array(
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'Core' => array(
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0 => array('Style'),
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// 'xml:space' => false,
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'class' => 'NMTOKENS',
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'id' => 'ID',
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'title' => 'CDATA',
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),
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'Lang' => array(
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'xml:lang' => false, // see constructor
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),
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'I18N' => array(
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0 => array('Lang'), // proprietary, for xml:lang/lang
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),
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'Common' => array(
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0 => array('Core', 'I18N')
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)
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);
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/**
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* Sets up direct objects not registered to HTMLPurifier_AttrTypes
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*/
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function HTMLPurifier_AttrCollections() {
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// setup direct objects
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$this->info['Lang']['xml:lang'] = new HTMLPurifier_AttrDef_Lang();
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}
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/**
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* Performs all expansions on internal data for use by other inclusions
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* It also collects all attribute collection extensions from
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* modules
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* @param $attr_types HTMLPurifier_AttrTypes instance
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* @param $modules Hash array of HTMLPurifier_HTMLModule members
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*/
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function setup($attr_types, $modules) {
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$info =& $this->info;
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// load extensions from the modules
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foreach ($modules as $module) {
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foreach ($module->attr_collections_info as $coll_i => $coll) {
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foreach ($coll as $attr_i => $attr) {
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if ($attr_i === 0 && isset($info[$coll_i][$attr_i])) {
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// merge in includes
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$info[$coll_i][$attr_i] = array_merge(
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$info[$coll_i][$attr_i], $attr);
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continue;
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}
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$info[$coll_i][$attr_i] = $attr;
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}
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}
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}
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// perform internal expansions and inclusions
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foreach ($info as $name => $attr) {
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// merge attribute collections that include others
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$this->performInclusions($info[$name]);
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// replace string identifiers with actual attribute objects
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$this->expandIdentifiers($info[$name], $attr_types);
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}
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}
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/**
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* Takes a reference to an attribute associative array and performs
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* all inclusions specified by the zero index.
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* @param &$attr Reference to attribute array
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*/
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function performInclusions(&$attr) {
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if (!isset($attr[0])) return;
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$merge = $attr[0];
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// loop through all the inclusions
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for ($i = 0; isset($merge[$i]); $i++) {
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// foreach attribute of the inclusion, copy it over
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foreach ($this->info[$merge[$i]] as $key => $value) {
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if (isset($attr[$key])) continue; // also catches more inclusions
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$attr[$key] = $value;
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}
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if (isset($info[$merge[$i]][0])) {
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// recursion
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$merge = array_merge($merge, isset($info[$merge[$i]][0]));
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}
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}
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unset($attr[0]);
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}
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/**
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* Expands all string identifiers in an attribute array by replacing
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* them with the appropriate values inside HTMLPurifier_AttrTypes
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* @param &$attr Reference to attribute array
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* @param $attr_types HTMLPurifier_AttrTypes instance
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*/
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function expandIdentifiers(&$attr, $attr_types) {
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foreach ($attr as $def_i => $def) {
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if ($def_i === 0) continue;
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if (!is_string($def)) continue;
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if (isset($attr_types->info[$def])) {
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$attr[$def_i] = $attr_types->info[$def];
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} else {
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trigger_error('Attempted to reference undefined attribute type', E_USER_ERROR);
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unset($attr[$def_i]);
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}
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}
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}
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}
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?>
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