array( '#type' => 'textfield', '#title' => t('Whitespace characters'), '#description' => t('Specify the characters that should be regarded as whitespace and therefore used as word-delimiters. ' . 'Specify the characters as a PCRE character class. ' . 'Note: For non-English content, the default setting might not be suitable.', array('@link' => url('http://www.php.net/manual/en/regexp.reference.character-classes.php'))), '#default_value' => "[^[:alnum:]]", ), 'ignorable' => array( '#type' => 'textfield', '#title' => t('Ignorable characters'), '#description' => t('Specify characters which should be removed from fulltext fields and search strings (e.g., "-"). The same format as above is used.'), '#default_value' => "[']", ), ); if (!empty($this->options)) { $form['spaces']['#default_value'] = $this->options['spaces']; $form['ignorable']['#default_value'] = $this->options['ignorable']; } return $form; } public function configurationFormValidate(array $form, array &$values, array &$form_state) { parent::configurationFormValidate($form, $values, $form_state); $spaces = str_replace('/', '\/', $values['spaces']); $ignorable = str_replace('/', '\/', $values['ignorable']); if (@preg_match('/(' . $spaces . ')+/u', '') === FALSE) { $el = $form['spaces']; form_error($el, $el['#title'] . ': ' . t('The entered text is no valid regular expression.')); } if (@preg_match('/(' . $ignorable . ')+/u', '') === FALSE) { $el = $form['ignorable']; form_error($el, $el['#title'] . ': ' . t('The entered text is no valid regular expression.')); } } protected function processFieldValue(&$value) { $this->prepare(); if ($this->ignorable) { $value = preg_replace('/(' . $this->ignorable . ')+/u', '', $value); } if ($this->spaces) { $arr = preg_split('/(' . $this->spaces . ')+/u', $value); if (count($arr) > 1) { $value = array(); foreach ($arr as $token) { $value[] = array('value' => $token); } } } } protected function process(&$value) { $this->prepare(); if ($this->ignorable) { $value = preg_replace('/' . $this->ignorable . '+/u', '', $value); } if ($this->spaces) { $value = preg_replace('/' . $this->spaces . '+/u', ' ', $value); } } protected function prepare() { if (!isset($this->spaces)) { $this->spaces = str_replace('/', '\/', $this->options['spaces']); $this->ignorable = str_replace('/', '\/', $this->options['ignorable']); } } }