Current Path : C:/Users/Mahmood/Desktop/moodle/lib/htmlpurifier/HTMLPurifier/ |
Current File : C:/Users/Mahmood/Desktop/moodle/lib/htmlpurifier/HTMLPurifier/ContentSets.php |
<?php /** * @todo Unit test */ class HTMLPurifier_ContentSets { /** * List of content set strings (pipe separators) indexed by name. * @type array */ public $info = array(); /** * List of content set lookups (element => true) indexed by name. * @type array * @note This is in HTMLPurifier_HTMLDefinition->info_content_sets */ public $lookup = array(); /** * Synchronized list of defined content sets (keys of info). * @type array */ protected $keys = array(); /** * Synchronized list of defined content values (values of info). * @type array */ protected $values = array(); /** * Merges in module's content sets, expands identifiers in the content * sets and populates the keys, values and lookup member variables. * @param HTMLPurifier_HTMLModule[] $modules List of HTMLPurifier_HTMLModule */ public function __construct($modules) { if (!is_array($modules)) { $modules = array($modules); } // populate content_sets based on module hints // sorry, no way of overloading foreach ($modules as $module) { foreach ($module->content_sets as $key => $value) { $temp = $this->convertToLookup($value); if (isset($this->lookup[$key])) { // add it into the existing content set $this->lookup[$key] = array_merge($this->lookup[$key], $temp); } else { $this->lookup[$key] = $temp; } } } $old_lookup = false; while ($old_lookup !== $this->lookup) { $old_lookup = $this->lookup; foreach ($this->lookup as $i => $set) { $add = array(); foreach ($set as $element => $x) { if (isset($this->lookup[$element])) { $add += $this->lookup[$element]; unset($this->lookup[$i][$element]); } } $this->lookup[$i] += $add; } } foreach ($this->lookup as $key => $lookup) { $this->info[$key] = implode(' | ', array_keys($lookup)); } $this->keys = array_keys($this->info); $this->values = array_values($this->info); } /** * Accepts a definition; generates and assigns a ChildDef for it * @param HTMLPurifier_ElementDef $def HTMLPurifier_ElementDef reference * @param HTMLPurifier_HTMLModule $module Module that defined the ElementDef */ public function generateChildDef(&$def, $module) { if (!empty($def->child)) { // already done! return; } $content_model = $def->content_model; if (is_string($content_model)) { // Assume that $this->keys is alphanumeric $def->content_model = preg_replace_callback( '/\b(' . implode('|', $this->keys) . ')\b/', array($this, 'generateChildDefCallback'), $content_model ); //$def->content_model = str_replace( // $this->keys, $this->values, $content_model); } $def->child = $this->getChildDef($def, $module); } public function generateChildDefCallback($matches) { return $this->info[$matches[0]]; } /** * Instantiates a ChildDef based on content_model and content_model_type * member variables in HTMLPurifier_ElementDef * @note This will also defer to modules for custom HTMLPurifier_ChildDef * subclasses that need content set expansion * @param HTMLPurifier_ElementDef $def HTMLPurifier_ElementDef to have ChildDef extracted * @param HTMLPurifier_HTMLModule $module Module that defined the ElementDef * @return HTMLPurifier_ChildDef corresponding to ElementDef */ public function getChildDef($def, $module) { $value = $def->content_model; if (is_object($value)) { trigger_error( 'Literal object child definitions should be stored in '. 'ElementDef->child not ElementDef->content_model', E_USER_NOTICE ); return $value; } switch ($def->content_model_type) { case 'required': return new HTMLPurifier_ChildDef_Required($value); case 'optional': return new HTMLPurifier_ChildDef_Optional($value); case 'empty': return new HTMLPurifier_ChildDef_Empty(); case 'custom': return new HTMLPurifier_ChildDef_Custom($value); } // defer to its module $return = false; if ($module->defines_child_def) { // save a func call $return = $module->getChildDef($def); } if ($return !== false) { return $return; } // error-out trigger_error( 'Could not determine which ChildDef class to instantiate', E_USER_ERROR ); return false; } /** * Converts a string list of elements separated by pipes into * a lookup array. * @param string $string List of elements * @return array Lookup array of elements */ protected function convertToLookup($string) { $array = explode('|', str_replace(' ', '', $string)); $ret = array(); foreach ($array as $k) { $ret[$k] = true; } return $ret; } } // vim: et sw=4 sts=4