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