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| // +----------------------------------------------------------------------+ // // $Id$ require_once('HTML/QuickForm/Rule.php'); /** * Validates values using callback functions or methods * @version 1.0 */ class HTML_QuickForm_Rule_Callback extends HTML_QuickForm_Rule { /** * Array of callbacks * * Array is in the format: * $_data['rulename'] = array('functionname', 'classname'); * If the callback is not a method, then the class name is not set. * * @var array * @access private */ var $_data = array(); /** * Whether to use BC mode for specific rules * * Previous versions of QF passed element's name as a first parameter * to validation functions, but not to validation methods. This behaviour * is emulated if you are using 'function' as rule type when registering. * * @var array * @access private */ var $_BCMode = array(); /** * Validates a value using a callback * * @param string $value Value to be checked * @param mixed $options Options for callback * @access public * @return boolean true if value is valid */ function validate($value, $options = null) { if (isset($this->_data[$this->name])) { $callback = $this->_data[$this->name]; if (isset($callback[1])) { return call_user_func(array($callback[1], $callback[0]), $value, $options); } elseif ($this->_BCMode[$this->name]) { return $callback[0]('', $value, $options); } else { return $callback[0]($value, $options); } } elseif (is_callable($options)) { return call_user_func($options, $value); } else { return true; } } // end func validate /** * Adds new callbacks to the callbacks list * * @param string $name Name of rule * @param string $callback Name of function or method * @param string $class Name of class containing the method * @param bool $BCMode Backwards compatibility mode * @access public */ function addData($name, $callback, $class = null, $BCMode = false) { if (!empty($class)) { $this->_data[$name] = array($callback, $class); } else { $this->_data[$name] = array($callback); } $this->_BCMode[$name] = $BCMode; } // end func addData function getValidationScript($options = null) { if (isset($this->_data[$this->name])) { $callback = $this->_data[$this->name][0]; $params = ($this->_BCMode[$this->name]? "'', {jsVar}": '{jsVar}') . (isset($options)? ", '{$options}'": ''); } else { $callback = is_array($options)? $options[1]: $options; $params = '{jsVar}'; } return array('', "{jsVar} != '' && !{$callback}({$params})"); } // end func getValidationScript } // end class HTML_QuickForm_Rule_Callback ?>