views_handler_argument_null.inc
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<?php
/**
* @file
* Definition of views_handler_argument_null.
*/
/**
* Argument handler that ignores the argument.
*
* @ingroup views_argument_handlers
*/
class views_handler_argument_null extends views_handler_argument {
function option_definition() {
$options = parent::option_definition();
$options['must_not_be'] = array('default' => FALSE, 'bool' => TRUE);
return $options;
}
/**
* Override options_form() so that only the relevant options
* are displayed to the user.
*/
function options_form(&$form, &$form_state) {
parent::options_form($form, $form_state);
$form['must_not_be'] = array(
'#type' => 'checkbox',
'#title' => t('Fail basic validation if any argument is given'),
'#default_value' => !empty($this->options['must_not_be']),
'#description' => t('By checking this field, you can use this to make sure views with more arguments than necessary fail validation.'),
'#fieldset' => 'more',
);
unset($form['exception']);
}
/**
* Override default_actions() to remove actions that don't
* make sense for a null argument.
*/
function default_actions($which = NULL) {
if ($which) {
if (in_array($which, array('ignore', 'not found', 'empty', 'default'))) {
return parent::default_actions($which);
}
return;
}
$actions = parent::default_actions();
unset($actions['summary asc']);
unset($actions['summary desc']);
return $actions;
}
function validate_argument_basic($arg) {
if (!empty($this->options['must_not_be'])) {
return !isset($arg);
}
return parent::validate_argument_basic($arg);
}
/**
* Override the behavior of query() to prevent the query
* from being changed in any way.
*/
function query($group_by = FALSE) {}
}