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<?php
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/**
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* @file
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* Contains the EntityFieldHandlerHelper class.
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*/
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/**
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* Helper class containing static implementations of common field handler methods.
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*
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* Used by the data selection entity field handlers to avoid code duplication.
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*
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* @see entity_views_table_definition()
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*/
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class EntityFieldHandlerHelper {
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/**
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* Provide appropriate default options for a handler.
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*/
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public static function option_definition($handler) {
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if (entity_property_list_extract_type($handler->definition['type'])) {
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$options['list']['contains']['mode'] = array('default' => 'collapse');
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$options['list']['contains']['separator'] = array('default' => ', ');
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$options['list']['contains']['type'] = array('default' => 'ul');
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}
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$options['link_to_entity'] = array('default' => FALSE);
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return $options;
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}
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/**
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* Provide an appropriate default option form for a handler.
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*/
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public static function options_form($handler, &$form, &$form_state) {
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if (entity_property_list_extract_type($handler->definition['type'])) {
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$form['list']['mode'] = array(
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'#type' => 'select',
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'#title' => t('List handling'),
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'#options' => array(
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'collapse' => t('Concatenate values using a seperator'),
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'list' => t('Output values as list'),
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'first' => t('Show first (if present)'),
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'count' => t('Show item count'),
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),
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'#default_value' => $handler->options['list']['mode'],
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);
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$form['list']['separator'] = array(
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'#type' => 'textfield',
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'#title' => t('List seperator'),
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'#default_value' => $handler->options['list']['separator'],
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'#dependency' => array('edit-options-list-mode' => array('collapse')),
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);
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$form['list']['type'] = array(
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'#type' => 'select',
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'#title' => t('List type'),
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'#options' => array(
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'ul' => t('Unordered'),
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'ol' => t('Ordered'),
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),
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'#default_value' => $handler->options['list']['type'],
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'#dependency' => array('edit-options-list-mode' => array('list')),
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);
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}
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$form['link_to_entity'] = array(
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'#type' => 'checkbox',
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'#title' => t('Link this field to its entity'),
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'#description' => t("When using this, you should not set any other link on the field."),
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'#default_value' => $handler->options['link_to_entity'],
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);
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}
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/**
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* Add the field for the entity ID (if necessary).
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*/
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public static function query($handler) {
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// Copied over from views_handler_field_entity::query().
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// Sets table_alias (entity table), base_field (entity id field) and
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// field_alias (the field's alias).
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$handler->table_alias = $base_table = $handler->view->base_table;
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$handler->base_field = $handler->view->base_field;
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if (!empty($handler->relationship)) {
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foreach ($handler->view->relationship as $relationship) {
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if ($relationship->alias == $handler->relationship) {
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$base_table = $relationship->definition['base'];
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$handler->table_alias = $relationship->alias;
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$table_data = views_fetch_data($base_table);
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$handler->base_field = empty($relationship->definition['base field']) ? $table_data['table']['base']['field'] : $relationship->definition['base field'];
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}
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}
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}
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// Add the field if the query back-end implements an add_field() method,
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// just like the default back-end.
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if (method_exists($handler->query, 'add_field')) {
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$handler->field_alias = $handler->query->add_field($handler->table_alias, $handler->base_field, '');
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}
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else {
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// To ensure there is an alias just set the field alias to the real field.
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$handler->field_alias = $handler->real_field;
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}
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}
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/**
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* Extracts the innermost field name from a data selector.
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*
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* @param $selector
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* The data selector.
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*
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* @return
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* The last component of the data selector.
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*/
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public static function get_selector_field_name($selector) {
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return ltrim(substr($selector, strrpos($selector, ':')), ':');
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}
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/**
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* Adds a click-sort to the query.
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*
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* @param $order
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* Either 'ASC' or 'DESC'.
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*/
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public static function click_sort($handler, $order) {
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// The normal orderby() method for this usually won't work here. So we need
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// query plugins to provide their own method for this.
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if (method_exists($handler->query, 'add_selector_orderby')) {
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$selector = self::construct_property_selector($handler, TRUE);
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$handler->query->add_selector_orderby($selector, $order);
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}
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}
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/**
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* Load the entities for all rows that are about to be displayed.
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*
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* Automatically takes care of relationships, including data selection
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* relationships. Results are written into @code $handler->wrappers @endcode
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* and @code $handler->entity_type @endcode is set.
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*/
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public static function pre_render($handler, &$values, $load_always = FALSE) {
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if (empty($values)) {
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return;
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}
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if (!$load_always && empty($handler->options['link_to_entity'])) {
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// Check whether we even need to load the entities.
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$selector = self::construct_property_selector($handler, TRUE);
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$load = FALSE;
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foreach ($values as $row) {
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if (empty($row->_entity_properties) || !array_key_exists($selector, $row->_entity_properties)) {
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$load = TRUE;
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break;
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}
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}
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if (!$load) {
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return;
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}
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}
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if (method_exists($handler->query, 'get_result_wrappers')) {
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list($handler->entity_type, $handler->wrappers) = $handler->query->get_result_wrappers($values, $handler->relationship, $handler->real_field);
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}
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else {
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list($handler->entity_type, $entities) = $handler->query->get_result_entities($values, $handler->relationship, $handler->real_field);
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$handler->wrappers = array();
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foreach ($entities as $id => $entity) {
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$handler->wrappers[$id] = entity_metadata_wrapper($handler->entity_type, $entity);
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}
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}
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}
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/**
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* Return an Entity API data selector for the given handler's relationship.
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*
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* A data selector is a concatenation of properties which should be followed
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* to arrive at a desired property that may be nested in related entities or
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* structures. The separate properties are herein concatenated with colons.
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*
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* For instance, a data selector of "author:roles" would mean to first
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* access the "author" property of the given wrapper, and then for this new
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* wrapper to access and return the "roles" property.
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*
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* Lists of entities are handled automatically by always returning only the
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* first entity.
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*
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* @param $handler
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* The handler for which to construct the selector.
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* @param $complete
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* If TRUE, the complete selector for the field is returned, not just the
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* one for its parent. Defaults to FALSE.
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*
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* @return
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* An Entity API data selector for the given handler's relationship.
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*/
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public static function construct_property_selector($handler, $complete = FALSE) {
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$return = '';
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if ($handler->relationship) {
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$current_handler = $handler;
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$view = $current_handler->view;
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$relationships = array();
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// Collect all relationships, keyed by alias.
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foreach ($view->relationship as $key => $relationship) {
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$key = $relationship->alias ? $relationship->alias : $key;
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$relationships[$key] = $relationship;
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}
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while (!empty($current_handler->relationship) && !empty($relationships[$current_handler->relationship])) {
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$current_handler = $relationships[$current_handler->relationship];
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$return = $current_handler->real_field . ($return ? ":$return" : '');
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}
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}
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if ($complete) {
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$return .= ($return ? ':' : '') . $handler->real_field;
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}
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elseif ($pos = strrpos($handler->real_field, ':')) {
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// If we have a selector as the real_field, append this to the returned
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// relationship selector.
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$return .= ($return ? ':' : '') . substr($handler->real_field, 0, $pos);
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}
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return $return;
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}
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/**
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* Extracts data from several metadata wrappers based on a data selector.
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*
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* All metadata wrappers passed to this function have to be based on the exact
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* same property information. The data will be returned wrapped by one or more
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* metadata wrappers.
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*
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* Can be used in query plugins for the get_result_entities() and
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* get_result_wrappers() methods.
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*
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* @param array $wrappers
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* The EntityMetadataWrapper objects from which to extract data.
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* @param $selector
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* The selector specifying the data to extract.
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*
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* @return array
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* An array with numeric indices, containing the type of the extracted
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* wrappers in the first element. The second element of the array contains
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* the extracted property value(s) for each wrapper, keyed to the same key
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* that was used for the respecive wrapper in $wrappers. All extracted
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* properties are returned as metadata wrappers.
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*/
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public static function extract_property_multiple(array $wrappers, $selector) {
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$parts = explode(':', $selector, 2);
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$name = $parts[0];
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248
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249
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$results = array();
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250
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$entities = array();
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$type = '';
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252
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foreach ($wrappers as $i => $wrapper) {
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try {
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$property = $wrapper->$name;
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$type = $property->type();
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256
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if ($property instanceof EntityDrupalWrapper) {
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257
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// Remember the entity IDs to later load all at once (so as to
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258
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// properly utilize multiple load functionality).
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$id = $property->getIdentifier();
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// Only accept valid ids. $id can be FALSE for entity values that are
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261
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// NULL.
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262
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if ($id) {
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263
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$entities[$type][$i] = $id;
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264
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}
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265
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}
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266
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elseif ($property instanceof EntityStructureWrapper) {
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267
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$results[$i] = $property;
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}
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269
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elseif ($property instanceof EntityListWrapper) {
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270
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foreach ($property as $item) {
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271
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$results[$i] = $item;
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272
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$type = $item->type();
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273
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break;
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274
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}
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275
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}
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276
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// Do nothing in case it cannot be applied.
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277
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}
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278
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catch (EntityMetadataWrapperException $e) {
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279
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// Skip single empty properties.
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280
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}
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281
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}
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282
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283
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if ($entities) {
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284
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// Map back the loaded entities back to the results array.
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285
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foreach ($entities as $type => $id_map) {
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286
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$loaded = entity_load($type, $id_map);
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287
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foreach ($id_map as $i => $id) {
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288
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if (isset($loaded[$id])) {
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289
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$results[$i] = entity_metadata_wrapper($type, $loaded[$id]);
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290
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}
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291
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}
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292
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}
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293
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}
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|
294
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|
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295
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// If there are no further parts in the selector, we are done now.
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296
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if (empty($parts[1])) {
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297
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return array($type, $results);
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298
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}
|
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299
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return self::extract_property_multiple($results, $parts[1]);
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300
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}
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|
301
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|
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302
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/**
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|
303
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* Get the value of a certain data selector.
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304
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*
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305
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* Uses $values->_entity_properties to look for already extracted properties.
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306
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*
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307
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* @param $handler
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308
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* The field handler for which to return a value.
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309
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* @param $values
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310
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* The values for the current row retrieved from the Views query, as an
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311
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* object.
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312
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* @param $field
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313
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* The field to extract. If no value is given, the field of the given
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314
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* handler is used instead. The special "entity object" value can be used to
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315
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* get the base entity instead of a special field.
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316
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* @param $default
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|
317
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* The value to return if the entity or field are not present.
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|
318
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*/
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319
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public static function get_value($handler, $values, $field = NULL, $default = NULL) {
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320
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// There is a value cache on each handler so parent handlers rendering a
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321
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// single field value from a list will get the single value, not the whole
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322
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// list.
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323
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if (!isset($field) && isset($handler->current_value)) {
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|
324
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return $handler->current_value;
|
|
325
|
}
|
|
326
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$field = isset($field) ? $field : self::get_selector_field_name($handler->real_field);
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327
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$selector = self::construct_property_selector($handler);
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328
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$selector = $selector ? "$selector:$field" : $field;
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|
329
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if (!isset($values->_entity_properties)) {
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330
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$values->_entity_properties = array();
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331
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}
|
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332
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if (!array_key_exists($selector, $values->_entity_properties)) {
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333
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if (!isset($handler->wrappers[$handler->view->row_index])) {
|
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334
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$values->_entity_properties[$selector] = $default;
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|
335
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}
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336
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elseif (is_array($handler->wrappers[$handler->view->row_index])) {
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337
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$values->_entity_properties[$selector] = self::extract_list_wrapper_values($handler->wrappers[$handler->view->row_index], $field);
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338
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}
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339
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else {
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340
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$wrapper = $handler->wrappers[$handler->view->row_index];
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341
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try {
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342
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if ($field === 'entity object') {
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343
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$values->_entity_properties[$selector] = $wrapper->value();
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344
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}
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345
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else {
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346
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$values->_entity_properties[$selector] = isset($wrapper->$field) ? $wrapper->$field->value(array('identifier' => TRUE, 'sanitize' => TRUE)) : $default;
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347
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}
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348
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}
|
|
349
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catch (EntityMetadataWrapperException $e) {
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|
350
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$values->_entity_properties[$selector] = $default;
|
|
351
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}
|
|
352
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}
|
|
353
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}
|
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354
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return $values->_entity_properties[$selector];
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|
355
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}
|
|
356
|
|
|
357
|
/**
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|
358
|
* Helper method for extracting the values from an array of wrappers.
|
|
359
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*
|
|
360
|
* Nested arrays of wrappers are also handled, the values are returned in a
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|
361
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* flat (not nested) array.
|
|
362
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*/
|
|
363
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public static function extract_list_wrapper_values(array $wrappers, $field) {
|
|
364
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$return = array();
|
|
365
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foreach ($wrappers as $wrapper) {
|
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366
|
if (is_array($wrapper)) {
|
|
367
|
$values = self::extract_list_wrapper_values($wrapper, $field);
|
|
368
|
if ($values) {
|
|
369
|
$return = array_merge($return, $values);
|
|
370
|
}
|
|
371
|
}
|
|
372
|
else {
|
|
373
|
try {
|
|
374
|
if ($field == 'entity object') {
|
|
375
|
$return[] = $wrapper->value();
|
|
376
|
}
|
|
377
|
elseif (isset($wrapper->$field)) {
|
|
378
|
$return[] = $wrapper->$field->value(array('identifier' => TRUE));
|
|
379
|
}
|
|
380
|
}
|
|
381
|
catch (EntityMetadataWrapperException $e) {
|
|
382
|
// An exception probably signifies a non-present property, so we just
|
|
383
|
// ignore it.
|
|
384
|
}
|
|
385
|
}
|
|
386
|
}
|
|
387
|
return $return;
|
|
388
|
}
|
|
389
|
|
|
390
|
/**
|
|
391
|
* Render the field.
|
|
392
|
*
|
|
393
|
* Implements the entity link functionality and list handling. Basic handling
|
|
394
|
* of the single values is delegated back to the field handler.
|
|
395
|
*
|
|
396
|
* @param $handler
|
|
397
|
* The field handler whose field should be rendered.
|
|
398
|
* @param $values
|
|
399
|
* The values for the current row retrieved from the Views query, as an
|
|
400
|
* object.
|
|
401
|
*
|
|
402
|
* @return
|
|
403
|
* The rendered value for the field.
|
|
404
|
*/
|
|
405
|
public static function render($handler, $values) {
|
|
406
|
$value = $handler->get_value($values);
|
|
407
|
if (is_array($value)) {
|
|
408
|
return self::render_list($handler, $value, $values);
|
|
409
|
}
|
|
410
|
return self::render_entity_link($handler, $value, $values);
|
|
411
|
}
|
|
412
|
|
|
413
|
/**
|
|
414
|
* Render a list of values.
|
|
415
|
*
|
|
416
|
* @param $handler
|
|
417
|
* The field handler whose field is rendered.
|
|
418
|
* @param $list
|
|
419
|
* The list of values to render.
|
|
420
|
* @param $values
|
|
421
|
* The values for the current row retrieved from the Views query, as an
|
|
422
|
* object.
|
|
423
|
*
|
|
424
|
* @return
|
|
425
|
* The rendered value for the given list.
|
|
426
|
*/
|
|
427
|
public static function render_list($handler, $list, $values) {
|
|
428
|
// Allow easy overriding of this behaviour in the specific field handler.
|
|
429
|
if (method_exists($handler, 'render_list')) {
|
|
430
|
return $handler->render_list($list, $values);
|
|
431
|
}
|
|
432
|
$mode = isset($handler->options['list']['mode']) ? $handler->options['list']['mode'] : NULL;
|
|
433
|
switch ($mode) {
|
|
434
|
case 'first':
|
|
435
|
$list = count($list) ? array_shift($list) : NULL;
|
|
436
|
if (is_array($list)) {
|
|
437
|
return self::render_list($handler, $list, $values);
|
|
438
|
}
|
|
439
|
elseif (isset($list)) {
|
|
440
|
return self::render_entity_link($handler, $list, $values);
|
|
441
|
}
|
|
442
|
return NULL;
|
|
443
|
|
|
444
|
case 'count':
|
|
445
|
return count($list);
|
|
446
|
|
|
447
|
// Handles both collapse and list output. Fallback is to collapse.
|
|
448
|
default:
|
|
449
|
$inner_values = array();
|
|
450
|
foreach ($list as $value) {
|
|
451
|
$value = is_array($value) ? self::render_list($handler, $value, $values) : self::render_entity_link($handler, $value, $values);
|
|
452
|
if ($value) {
|
|
453
|
$inner_values[] = $value;
|
|
454
|
}
|
|
455
|
}
|
|
456
|
|
|
457
|
// Format output as list.
|
|
458
|
if ($mode == 'list') {
|
|
459
|
$type = isset($handler->options['list']['type']) ? $handler->options['list']['type'] : 'ul';
|
|
460
|
return theme('item_list', array(
|
|
461
|
'items' => $inner_values,
|
|
462
|
'type' => $type,
|
|
463
|
));
|
|
464
|
}
|
|
465
|
|
|
466
|
$separator = isset($handler->options['list']['separator']) ? $handler->options['list']['separator'] : ', ';
|
|
467
|
return implode($separator, $inner_values);
|
|
468
|
}
|
|
469
|
}
|
|
470
|
|
|
471
|
/**
|
|
472
|
* Render a single value as a link to the entity if applicable.
|
|
473
|
*
|
|
474
|
* @param $handler
|
|
475
|
* The field handler whose field is rendered.
|
|
476
|
* @param $value
|
|
477
|
* The single value to render.
|
|
478
|
* @param $values
|
|
479
|
* The values for the current row retrieved from the Views query, as an
|
|
480
|
* object.
|
|
481
|
*
|
|
482
|
* @return
|
|
483
|
* The rendered value.
|
|
484
|
*/
|
|
485
|
public static function render_entity_link($handler, $value, $values) {
|
|
486
|
// Allow easy overriding of this behaviour in the specific field handler.
|
|
487
|
if (method_exists($handler, 'render_entity_link')) {
|
|
488
|
return $handler->render_entity_link($value, $values);
|
|
489
|
}
|
|
490
|
$render = self::render_single_value($handler, $value, $values);
|
|
491
|
if (!$handler->options['link_to_entity']) {
|
|
492
|
return $render;
|
|
493
|
}
|
|
494
|
$entity = $handler->get_value($values, 'entity object');
|
|
495
|
if (is_object($entity) && ($url = entity_uri($handler->entity_type, $entity))) {
|
|
496
|
return l($render, $url['path'], array('html' => TRUE) + $url['options']);
|
|
497
|
}
|
|
498
|
return $render;
|
|
499
|
}
|
|
500
|
|
|
501
|
/**
|
|
502
|
* Render a single value.
|
|
503
|
*
|
|
504
|
* @param $handler
|
|
505
|
* The field handler whose field is rendered.
|
|
506
|
* @param $value
|
|
507
|
* The single value to render.
|
|
508
|
* @param $values
|
|
509
|
* The values for the current row retrieved from the Views query, as an
|
|
510
|
* object.
|
|
511
|
*
|
|
512
|
* @return
|
|
513
|
* The rendered value.
|
|
514
|
*/
|
|
515
|
public static function render_single_value($handler, $value, $values) {
|
|
516
|
// Try to use the method in the specific field handler.
|
|
517
|
if (method_exists($handler, 'render_single_value')) {
|
|
518
|
$handler->current_value = $value;
|
|
519
|
$return = $handler->render_single_value($value, $values);
|
|
520
|
unset($handler->current_value);
|
|
521
|
return $return;
|
|
522
|
}
|
|
523
|
// Default fallback in case the field handler doesn't provide the method.
|
|
524
|
return is_scalar($value) ? check_plain($value) : nl2br(check_plain(print_r($value, TRUE)));
|
|
525
|
}
|
|
526
|
|
|
527
|
}
|
