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<?php /** * Configuration definition, defines directives and their defaults. */ class HTMLPurifier_ConfigSchema { /** * Defaults of the directives and namespaces. * @type array * @note This shares the exact same structure as HTMLPurifier_Config::$conf */ public $defaults = array(); /** * The default property list. Do not edit this property list. * @type array */ public $defaultPlist; /** * Definition of the directives. * The structure of this is: * * array( * 'Namespace' => array( * 'Directive' => new stdClass(), * ) * ) * * The stdClass may have the following properties: * * - If isAlias isn't set: * - type: Integer type of directive, see HTMLPurifier_VarParser for definitions * - allow_null: If set, this directive allows null values * - aliases: If set, an associative array of value aliases to real values * - allowed: If set, a lookup array of allowed (string) values * - If isAlias is set: * - namespace: Namespace this directive aliases to * - name: Directive name this directive aliases to * * In certain degenerate cases, stdClass will actually be an integer. In * that case, the value is equivalent to an stdClass with the type * property set to the integer. If the integer is negative, type is * equal to the absolute value of integer, and allow_null is true. * * This class is friendly with HTMLPurifier_Config. If you need introspection * about the schema, you're better of using the ConfigSchema_Interchange, * which uses more memory but has much richer information. * @type array */ public $info = array(); /** * Application-wide singleton * @type HTMLPurifier_ConfigSchema */ protected static $singleton; public function __construct() { $this->defaultPlist = new HTMLPurifier_PropertyList(); } /** * Unserializes the default ConfigSchema. * @return HTMLPurifier_ConfigSchema */ public static function makeFromSerial() { $contents = file_get_contents(HTMLPURIFIER_PREFIX . '/HTMLPurifier/ConfigSchema/schema.ser'); $r = unserialize($contents); if (!$r) { $hash = sha1($contents); trigger_error("Unserialization of configuration schema failed, sha1 of file was $hash", E_USER_ERROR); } return $r; } /** * Retrieves an instance of the application-wide configuration definition. * @param HTMLPurifier_ConfigSchema $prototype * @return HTMLPurifier_ConfigSchema */ public static function instance($prototype = null) { if ($prototype !== null) { HTMLPurifier_ConfigSchema::$singleton = $prototype; } elseif (HTMLPurifier_ConfigSchema::$singleton === null || $prototype === true) { HTMLPurifier_ConfigSchema::$singleton = HTMLPurifier_ConfigSchema::makeFromSerial(); } return HTMLPurifier_ConfigSchema::$singleton; } /** * Defines a directive for configuration * @warning Will fail of directive's namespace is defined. * @warning This method's signature is slightly different from the legacy * define() static method! Beware! * @param string $key Name of directive * @param mixed $default Default value of directive * @param string $type Allowed type of the directive. See * HTMLPurifier_VarParser::$types for allowed values * @param bool $allow_null Whether or not to allow null values */ public function add($key, $default, $type, $allow_null) { $obj = new stdClass(); $obj->type = is_int($type) ? $type : HTMLPurifier_VarParser::$types[$type]; if ($allow_null) { $obj->allow_null = true; } $this->info[$key] = $obj; $this->defaults[$key] = $default; $this->defaultPlist->set($key, $default); } /** * Defines a directive value alias. * * Directive value aliases are convenient for developers because it lets * them set a directive to several values and get the same result. * @param string $key Name of Directive * @param array $aliases Hash of aliased values to the real alias */ public function addValueAliases($key, $aliases) { if (!isset($this->info[$key]->aliases)) { $this->info[$key]->aliases = array(); } foreach ($aliases as $alias => $real) { $this->info[$key]->aliases[$alias] = $real; } } /** * Defines a set of allowed values for a directive. * @warning This is slightly different from the corresponding static * method definition. * @param string $key Name of directive * @param array $allowed Lookup array of allowed values */ public function addAllowedValues($key, $allowed) { $this->info[$key]->allowed = $allowed; } /** * Defines a directive alias for backwards compatibility * @param string $key Directive that will be aliased * @param string $new_key Directive that the alias will be to */ public function addAlias($key, $new_key) { $obj = new stdClass; $obj->key = $new_key; $obj->isAlias = true; $this->info[$key] = $obj; } /** * Replaces any stdClass that only has the type property with type integer. */ public function postProcess() { foreach ($this->info as $key => $v) { if (count((array) $v) == 1) { $this->info[$key] = $v->type; } elseif (count((array) $v) == 2 && isset($v->allow_null)) { $this->info[$key] = -$v->type; } } } } // vim: et sw=4 sts=4