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@@ -0,0 +1,326 @@
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+<?php
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+class tripal_views_handler_filter_string extends tripal_views_handler_filter {
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+ // exposed filter options
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+ var $always_multiple = TRUE;
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+
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+ function option_definition() {
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+ $options = parent::option_definition();
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+
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+ $options['expose']['contains']['required'] = array('default' => FALSE, 'bool' => TRUE);
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+
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+ return $options;
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+ }
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+
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+ /**
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+ * This kind of construct makes it relatively easy for a child class
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+ * to add or remove functionality by overriding this function and
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+ * adding/removing items from this array.
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+ */
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+ function operators() {
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+ $operators = array(
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+ '=' => array(
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+ 'title' => t('Is equal to'),
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+ 'short' => t('='),
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+ 'method' => 'op_equal',
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+ 'values' => 1,
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+ ),
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+ '!=' => array(
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+ 'title' => t('Is not equal to'),
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+ 'short' => t('!='),
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+ 'method' => 'op_equal',
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+ 'values' => 1,
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+ ),
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+ 'contains' => array(
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+ 'title' => t('Contains'),
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+ 'short' => t('contains'),
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+ 'method' => 'op_contains',
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+ 'values' => 1,
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+ ),
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+ 'word' => array(
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+ 'title' => t('Contains any word'),
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+ 'short' => t('has word'),
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+ 'method' => 'op_word',
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+ 'values' => 1,
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+ ),
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+ 'allwords' => array(
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+ 'title' => t('Contains all words'),
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+ 'short' => t('has all'),
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+ 'method' => 'op_word',
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+ 'values' => 1,
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+ ),
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+ 'starts' => array(
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+ 'title' => t('Starts with'),
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+ 'short' => t('begins'),
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+ 'method' => 'op_starts',
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+ 'values' => 1,
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+ ),
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+ 'not_starts' => array(
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+ 'title' => t('Does not start with'),
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+ 'short' => t('not_begins'),
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+ 'method' => 'op_not_starts',
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+ 'values' => 1,
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+ ),
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+ 'ends' => array(
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+ 'title' => t('Ends with'),
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+ 'short' => t('ends'),
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+ 'method' => 'op_ends',
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+ 'values' => 1,
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+ ),
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+ 'not_ends' => array(
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+ 'title' => t('Does not end with'),
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+ 'short' => t('not_ends'),
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+ 'method' => 'op_not_ends',
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+ 'values' => 1,
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+ ),
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+ 'not' => array(
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+ 'title' => t('Does not contain'),
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+ 'short' => t('!has'),
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+ 'method' => 'op_not',
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+ 'values' => 1,
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+ ),
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+ 'shorterthan' => array(
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+ 'title' => t('Length is shorter than'),
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+ 'short' => t('shorter than'),
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+ 'method' => 'op_shorter',
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+ 'values' => 1,
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+ ),
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+ 'longerthan' => array(
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+ 'title' => t('Length is longer than'),
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+ 'short' => t('longer than'),
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+ 'method' => 'op_longer',
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+ 'values' => 1,
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+ ),
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+ );
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+ // if the definition allows for the empty operator, add it.
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+ if (!empty($this->definition['allow empty'])) {
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+ $operators += array(
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+ 'empty' => array(
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+ 'title' => t('Is empty (NULL)'),
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+ 'method' => 'op_empty',
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+ 'short' => t('empty'),
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+ 'values' => 0,
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+ ),
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+ 'not empty' => array(
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+ 'title' => t('Is not empty (NOT NULL)'),
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+ 'method' => 'op_empty',
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+ 'short' => t('not empty'),
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+ 'values' => 0,
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+ ),
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+ );
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+ }
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+ // Add regexp support for MySQL.
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+ if (Database::getConnection()->databaseType() == 'mysql') {
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+ $operators += array(
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+ 'regular_expression' => array(
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+ 'title' => t('Regular expression'),
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+ 'short' => t('regex'),
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+ 'method' => 'op_regex',
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+ 'values' => 1,
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+ ),
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+ );
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+ }
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+
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+ return $operators;
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+ }
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+
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+ /**
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+ * Build strings from the operators() for 'select' options
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+ */
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+ function operator_options($which = 'title') {
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+ $options = array();
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+ foreach ($this->operators() as $id => $info) {
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+ $options[$id] = $info[$which];
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+ }
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+
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+ return $options;
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+ }
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+
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+ function admin_summary() {
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+ if ($this->is_a_group()) {
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+ return t('grouped');
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+ }
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+ if (!empty($this->options['exposed'])) {
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+ return t('exposed');
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+ }
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+
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+ $options = $this->operator_options('short');
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+ $output = '';
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+ if (!empty($options[$this->operator])) {
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+ $output = check_plain($options[$this->operator]);
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+ }
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+ if (in_array($this->operator, $this->operator_values(1))) {
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+ $output .= ' ' . check_plain($this->value);
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+ }
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+ return $output;
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+ }
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+
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+ function operator_values($values = 1) {
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+ $options = array();
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+ foreach ($this->operators() as $id => $info) {
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+ if (isset($info['values']) && $info['values'] == $values) {
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+ $options[] = $id;
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+ }
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+ }
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+
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+ return $options;
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+ }
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+
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+ /**
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+ * Provide a simple textfield for equality
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+ */
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+ function value_form(&$form, &$form_state) {
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+ // We have to make some choices when creating this as an exposed
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+ // filter form. For example, if the operator is locked and thus
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+ // not rendered, we can't render dependencies; instead we only
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+ // render the form items we need.
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+ $which = 'all';
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+ if (!empty($form['operator'])) {
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+ $source = ($form['operator']['#type'] == 'radios') ? 'radio:options[operator]' : 'edit-options-operator';
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+ }
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+ if (!empty($form_state['exposed'])) {
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+ $identifier = $this->options['expose']['identifier'];
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+
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+ if (empty($this->options['expose']['use_operator']) || empty($this->options['expose']['operator_id'])) {
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+ // exposed and locked.
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+ $which = in_array($this->operator, $this->operator_values(1)) ? 'value' : 'none';
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+ }
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+ else {
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+ $source = 'edit-' . drupal_html_id($this->options['expose']['operator_id']);
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+ }
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+ }
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+
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+ if ($which == 'all' || $which == 'value') {
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+ $form['value'] = array(
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+ '#type' => 'textfield',
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+ '#title' => t('Value'),
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+ '#size' => 30,
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+ '#default_value' => $this->value,
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+ );
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+ if (!empty($form_state['exposed']) && !isset($form_state['input'][$identifier])) {
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+ $form_state['input'][$identifier] = $this->value;
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+ }
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+
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+ if ($which == 'all') {
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+ $form['value'] += array(
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+ '#dependency' => array($source => $this->operator_values(1)),
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+ );
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+ }
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+ }
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+
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+ if (!isset($form['value'])) {
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+ // Ensure there is something in the 'value'.
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+ $form['value'] = array(
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+ '#type' => 'value',
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+ '#value' => NULL
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+ );
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+ }
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+ }
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+
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+ function operator() {
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+ return $this->operator == '=' ? 'LIKE' : 'NOT LIKE';
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+ }
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+
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+ /**
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+ * Add this filter to the query.
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+ *
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+ * Due to the nature of fapi, the value and the operator have an unintended
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+ * level of indirection. You will find them in $this->operator
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+ * and $this->value respectively.
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+ */
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+ function query() {
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+ $this->ensure_my_table();
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+ $field = $this->real_field;
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+
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+ $info = $this->operators();
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+ if (!empty($info[$this->operator]['method'])) {
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+ $this->{$info[$this->operator]['method']}($field);
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+ }
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+ }
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+
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+ function op_equal($field) {
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+ $this->query->add_where($this->options['group'], $field, $this->value, $this->operator());
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+ }
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+
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+ function op_contains($field) {
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+ $this->query->add_where($this->options['group'], $field, '%' . db_like($this->value) . '%', 'LIKE');
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+ }
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+
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+ function op_word($field) {
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+ $where = $this->operator == 'word' ? db_or() : db_and();
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+
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+ // Don't filter on empty strings.
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+ if (empty($this->value)) {
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+ return;
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+ }
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+
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+ preg_match_all('/ (-?)("[^"]+"|[^" ]+)/i', ' ' . $this->value, $matches, PREG_SET_ORDER);
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+ foreach ($matches as $match) {
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+ $phrase = false;
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+ // Strip off phrase quotes
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+ if ($match[2]{0} == '"') {
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+ $match[2] = substr($match[2], 1, -1);
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+ $phrase = true;
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+ }
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+ $words = trim($match[2], ',?!();:-');
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+ $words = $phrase ? array($words) : preg_split('/ /', $words, -1, PREG_SPLIT_NO_EMPTY);
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+ foreach ($words as $word) {
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+ $placeholder = $this->placeholder();
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+ $where->condition($field, '%' . db_like(trim($word, " ,!?")) . '%', 'LIKE');
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+ }
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+ }
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+
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+ if (!$where) {
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+ return;
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+ }
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+
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+ // previously this was a call_user_func_array but that's unnecessary
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+ // as views will unpack an array that is a single arg.
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+ $this->query->add_where($this->options['group'], $where);
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+ }
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+
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+ function op_starts($field) {
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+ $this->query->add_where($this->options['group'], $field, db_like($this->value) . '%', 'LIKE');
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+ }
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+
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+ function op_not_starts($field) {
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+ $this->query->add_where($this->options['group'], $field, db_like($this->value) . '%', 'NOT LIKE');
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+ }
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+
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+ function op_ends($field) {
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+ $this->query->add_where($this->options['group'], $field, '%' . db_like($this->value), 'LIKE');
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+ }
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+
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+ function op_not_ends($field) {
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+ $this->query->add_where($this->options['group'], $field, '%' . db_like($this->value), 'NOT LIKE');
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+ }
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+
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+ function op_not($field) {
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+ $this->query->add_where($this->options['group'], $field, '%' . db_like($this->value) . '%', 'NOT LIKE');
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+ }
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+
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+ function op_shorter($field) {
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+ $placeholder = $this->placeholder();
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+ $this->query->add_where_expression($this->options['group'], "LENGTH($field) < $placeholder", array($placeholder => $this->value));
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+ }
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+
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+ function op_longer($field) {
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+ $placeholder = $this->placeholder();
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+ $this->query->add_where_expression($this->options['group'], "LENGTH($field) > $placeholder", array($placeholder => $this->value));
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+ }
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+
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+ function op_regex($field) {
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+ $this->query->add_where($this->options['group'], $field, $this->value, 'RLIKE');
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+ }
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+
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+ function op_empty($field) {
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+ if ($this->operator == 'empty') {
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+ $operator = "IS NULL";
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+ }
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+ else {
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+ $operator = "IS NOT NULL";
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+ }
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+
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+ $this->query->add_where($this->options['group'], $field, NULL, $operator);
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+ }
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+
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+}
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Chun-Huai Cheng