New module 'Views'

sites/all/modules/views/handlers/views_handler_argument_null.inc

@@ -0,0 +1,59 @@
+<?php
+/**
+ * Argument handler that ignores the argument.
+ */
+class views_handler_argument_null extends views_handler_argument {
+  function option_definition() {
+    $options = parent::option_definition();
+    $options['must_not_be'] = array('default' => FALSE);
+    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.'),
+    );
+
+    unset($form['wildcard']);
+    unset($form['wildcard_substitution']);
+  }
+
+  /**
+   * 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() {}
+}