273 lines
8.3 KiB
PHP
273 lines
8.3 KiB
PHP
<?php
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/**
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* @file
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* Field Info API, providing information about available fields and field types.
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*/
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use Drupal\Core\Cache\CacheBackendInterface;
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use Drupal\Core\Language\Language;
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use Drupal\field\Field;
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/**
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* @defgroup field_info Field Info API
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* @{
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* Obtains information about Field API configuration.
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*
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* The Field Info API exposes information about field types, fields, instances,
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* bundles, widget types, display formatters, behaviors, and settings defined by
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* or with the Field API.
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*
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* See @link field Field API @endlink for information about the other parts of
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* the Field API.
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*/
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/**
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* Clears the field info cache without clearing the field data cache.
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*
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* This is useful when deleted fields or instances are purged. We need to remove
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* the purged records, but no actual field data items are affected.
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*/
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function field_info_cache_clear() {
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drupal_static_reset('field_view_mode_settings');
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drupal_static_reset('field_form_mode_settings');
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drupal_static_reset('field_available_languages');
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// @todo: Remove this when field_attach_*_bundle() bundle management
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// functions are moved to the entity API.
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entity_info_cache_clear();
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// Clear typed data definitions.
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Drupal::typedData()->clearCachedDefinitions();
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Drupal::service('plugin.manager.entity.field.field_type')->clearCachedDefinitions();
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_field_info_collate_types_reset();
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Field::fieldInfo()->flush();
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}
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/**
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* Collates all information on field types, widget types and related structures.
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*
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* @return
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* An associative array containing:
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* - 'storage types': Array of hook_field_storage_info() results, keyed by
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* storage type names. Each element has the following components: label,
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* description, and settings from hook_field_storage_info(), as well as
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* module, giving the module that exposes the storage type.
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*
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* @see _field_info_collate_types_reset()
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*/
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function _field_info_collate_types() {
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$language_interface = language(Language::TYPE_INTERFACE);
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// Use the advanced drupal_static() pattern, since this is called very often.
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static $drupal_static_fast;
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if (!isset($drupal_static_fast)) {
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$drupal_static_fast['field_info_collate_types'] = &drupal_static(__FUNCTION__);
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}
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$info = &$drupal_static_fast['field_info_collate_types'];
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// The _info() hooks invoked below include translated strings, so each
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// language is cached separately.
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$langcode = $language_interface->id;
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if (!isset($info)) {
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if ($cached = cache('field')->get("field_info_types:$langcode")) {
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$info = $cached->data;
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}
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else {
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$info = array(
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'storage types' => array(),
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);
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// Populate storage types.
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foreach (Drupal::moduleHandler()->getImplementations('field_storage_info') as $module) {
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$storage_types = (array) module_invoke($module, 'field_storage_info');
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foreach ($storage_types as $name => $storage_info) {
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// Provide defaults.
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$storage_info += array(
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'settings' => array(),
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);
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$info['storage types'][$name] = $storage_info;
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$info['storage types'][$name]['module'] = $module;
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}
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}
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drupal_alter('field_storage_info', $info['storage types']);
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cache('field')->set("field_info_types:$langcode", $info, CacheBackendInterface::CACHE_PERMANENT, array('field_info_types' => TRUE));
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}
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}
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return $info;
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}
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/**
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* Clears collated information on field and widget types and related structures.
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*/
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function _field_info_collate_types_reset() {
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drupal_static_reset('_field_info_collate_types');
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// Clear all languages.
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cache('field')->deleteTags(array('field_info_types' => TRUE));
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}
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/**
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* Determines the behavior of a widget with respect to an operation.
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*
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* @param string $op
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* The name of the operation. Currently supported: 'default_value',
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* 'multiple_values'.
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* @param array $instance
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* The field instance array.
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*
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* @return int
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* One of these values:
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* - FIELD_BEHAVIOR_NONE: Do nothing for this operation.
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* - FIELD_BEHAVIOR_CUSTOM: Use the widget's callback function.
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* - FIELD_BEHAVIOR_DEFAULT: Use field.module default behavior.
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*/
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function field_behaviors_widget($op, $instance) {
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$info = array();
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if ($component = entity_get_form_display($instance['entity_type'], $instance['bundle'], 'default')->getComponent($instance['field_name'])) {
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$info = \Drupal::service('plugin.manager.field.widget')->getDefinition($component['type']);
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}
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return isset($info[$op]) ? $info[$op] : FIELD_BEHAVIOR_DEFAULT;
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}
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/**
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* Returns information about field storage from hook_field_storage_info().
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*
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* @param $storage_type
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* (optional) A storage type name. If omitted, all storage types will be
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* returned.
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*
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* @return
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* Either a storage type description, as provided by
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* hook_field_storage_info(), or an array of all existing storage types, keyed
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* by storage type name.
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*/
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function field_info_storage_types($storage_type = NULL) {
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$info = _field_info_collate_types();
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$storage_types = $info['storage types'];
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if ($storage_type) {
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if (isset($storage_types[$storage_type])) {
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return $storage_types[$storage_type];
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}
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}
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else {
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return $storage_types;
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}
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}
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/**
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* Returns all field definitions.
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*
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* Use of this function should be avoided when possible, since it loads and
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* statically caches a potentially large array of information. Use
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* field_info_field_map() instead.
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*
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* When iterating over the fields present in a given bundle after a call to
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* field_info_instances($entity_type, $bundle), it is recommended to use
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* field_info_field() on each individual field instead.
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*
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* @return
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* An array of field definitions, keyed by field name. Each field has an
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* additional property, 'bundles', which is an array of all the bundles to
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* which this field belongs, keyed by entity type.
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*
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* @see field_info_field_map()
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*/
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function field_info_fields() {
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$info = Field::fieldInfo()->getFields();
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$fields = array();
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foreach ($info as $key => $field) {
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if (!$field['deleted']) {
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$fields[$field['field_name']] = $field;
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}
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}
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return $fields;
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}
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/**
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* Returns a list and settings of pseudo-field elements in a given bundle.
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*
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* If $context is 'form', an array with the following structure:
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* @code
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* array(
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* 'name_of_pseudo_field_component' => array(
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* 'label' => The human readable name of the component,
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* 'description' => A short description of the component content,
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* 'weight' => The weight of the component in edit forms,
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* ),
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* 'name_of_other_pseudo_field_component' => array(
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* // ...
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* ),
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* );
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* @endcode
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*
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* If $context is 'display', an array with the following structure:
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* @code
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* array(
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* 'name_of_pseudo_field_component' => array(
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* 'label' => The human readable name of the component,
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* 'description' => A short description of the component content,
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* // One entry per view mode, including the 'default' mode:
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* 'display' => array(
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* 'default' => array(
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* 'weight' => The weight of the component in displayed entities in
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* this view mode,
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* 'visible' => TRUE if the component is visible, FALSE if hidden, in
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* displayed entities in this view mode,
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* ),
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* 'teaser' => array(
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* // ...
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* ),
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* ),
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* ),
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* 'name_of_other_pseudo_field_component' => array(
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* // ...
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* ),
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* );
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* @endcode
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*
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* @param $entity_type
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* The type of entity; e.g. 'node' or 'user'.
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* @param $bundle
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* The bundle name.
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* @param $context
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* The context for which the list of pseudo-fields is requested. Either 'form'
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* or 'display'.
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*
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* @return
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* The array of pseudo-field elements in the bundle.
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*/
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function field_info_extra_fields($entity_type, $bundle, $context) {
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$info = Field::fieldInfo()->getBundleExtraFields($entity_type, $bundle);
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return isset($info[$context]) ? $info[$context] : array();
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}
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/**
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* Returns a field storage type's default settings.
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*
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* @param $type
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* A field storage type name.
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*
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* @return
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* The storage type's default settings, as provided by
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* hook_field_storage_info(), or an empty array if type or settings are
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* undefined.
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*/
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function field_info_storage_settings($type) {
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$info = field_info_storage_types($type);
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return isset($info['settings']) ? $info['settings'] : array();
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}
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/**
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* @} End of "defgroup field_info".
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*/
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