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- <?php
- /**
- * @file
- * Field Info API, providing information about available fields and field types.
- */
- /**
- * Retrieves the FieldInfo object for the current request.
- *
- * @return FieldInfo
- * An instance of the FieldInfo class.
- */
- function _field_info_field_cache() {
- // Use the advanced drupal_static() pattern, since this is called very often.
- static $drupal_static_fast;
- if (!isset($drupal_static_fast)) {
- $drupal_static_fast['field_info_field_cache'] = &drupal_static(__FUNCTION__);
- }
- $field_info = &$drupal_static_fast['field_info_field_cache'];
- if (!isset($field_info)) {
- // @todo The registry should save the need for an explicit include, but not
- // a couple upgrade tests (DisabledNodeTypeTestCase,
- // FilterFormatUpgradePathTestCase...) break in a strange way without it.
- include_once dirname(__FILE__) . '/field.info.class.inc';
- $field_info = new FieldInfo();
- }
- return $field_info;
- }
- /**
- * @defgroup field_info Field Info API
- * @{
- * Obtain information about Field API configuration.
- *
- * The Field Info API exposes information about field types, fields,
- * instances, bundles, widget types, display formatters, behaviors,
- * and settings defined by or with the Field API.
- *
- * See @link field Field API @endlink for information about the other parts of
- * the Field API.
- */
- /**
- * Clears the field info cache without clearing the field data cache.
- *
- * This is useful when deleted fields or instances are purged. We
- * need to remove the purged records, but no actual field data items
- * are affected.
- */
- function field_info_cache_clear() {
- drupal_static_reset('field_view_mode_settings');
- drupal_static_reset('field_available_languages');
- // @todo: Remove this when field_attach_*_bundle() bundle management
- // functions are moved to the entity API.
- entity_info_cache_clear();
- _field_info_collate_types(TRUE);
- _field_info_field_cache()->flush();
- }
- /**
- * Collates all information on existing fields and instances.
- *
- * Deprecated. This function is kept to ensure backwards compatibility, but has
- * a serious performance impact, and should be absolutely avoided.
- * See http://drupal.org/node/1915646.
- *
- * Use the regular field_info_*() API functions to access the information, or
- * field_info_cache_clear() to clear the cached data.
- */
- function _field_info_collate_fields($reset = FALSE) {
- if ($reset) {
- _field_info_field_cache()->flush();
- return;
- }
- $cache = _field_info_field_cache();
- // Collect fields, and build the array of IDs keyed by field_name.
- $fields = $cache->getFields();
- $field_ids = array();
- foreach ($fields as $id => $field) {
- if (!$field['deleted']) {
- $field_ids[$field['field_name']] = $id;
- }
- }
- // Collect extra fields for all entity types.
- $extra_fields = array();
- foreach (field_info_bundles() as $entity_type => $bundles) {
- foreach ($bundles as $bundle => $info) {
- $extra_fields[$entity_type][$bundle] = $cache->getBundleExtraFields($entity_type, $bundle);
- }
- }
- return array(
- 'fields' => $fields,
- 'field_ids' => $field_ids,
- 'instances' => $cache->getInstances(),
- 'extra_fields' => $extra_fields,
- );
- }
- /**
- * Collates all information on field types, widget types and related structures.
- *
- * @param $reset
- * If TRUE, clear the cache. The information will be rebuilt from the database
- * next time it is needed. Defaults to FALSE.
- *
- * @return
- * If $reset is TRUE, nothing.
- * If $reset is FALSE, an array containing the following elements:
- * - 'field types': Array of hook_field_info() results, keyed by field_type.
- * Each element has the following components: label, description, settings,
- * instance_settings, default_widget, default_formatter, and behaviors
- * from hook_field_info(), as well as module, giving the module that exposes
- * the field type.
- * - 'widget types': Array of hook_field_widget_info() results, keyed by
- * widget_type. Each element has the following components: label, field
- * types, settings, weight, and behaviors from hook_field_widget_info(),
- * as well as module, giving the module that exposes the widget type.
- * - 'formatter types': Array of hook_field_formatter_info() results, keyed by
- * formatter_type. Each element has the following components: label, field
- * types, and behaviors from hook_field_formatter_info(), as well as
- * module, giving the module that exposes the formatter type.
- * - 'storage types': Array of hook_field_storage_info() results, keyed by
- * storage type names. Each element has the following components: label,
- * description, and settings from hook_field_storage_info(), as well as
- * module, giving the module that exposes the storage type.
- * - 'fieldable types': Array of hook_entity_info() results, keyed by
- * entity_type. Each element has the following components: name, id key,
- * revision key, bundle key, cacheable, and bundles from hook_entity_info(),
- * as well as module, giving the module that exposes the entity type.
- */
- function _field_info_collate_types($reset = FALSE) {
- global $language;
- static $info;
- // The _info() hooks invoked below include translated strings, so each
- // language is cached separately.
- $langcode = $language->language;
- if ($reset) {
- $info = NULL;
- // Clear all languages.
- cache_clear_all('field_info_types:', 'cache_field', TRUE);
- return;
- }
- if (!isset($info)) {
- if ($cached = cache_get("field_info_types:$langcode", 'cache_field')) {
- $info = $cached->data;
- }
- else {
- $info = array(
- 'field types' => array(),
- 'widget types' => array(),
- 'formatter types' => array(),
- 'storage types' => array(),
- );
- // Populate field types.
- foreach (module_implements('field_info') as $module) {
- $field_types = (array) module_invoke($module, 'field_info');
- foreach ($field_types as $name => $field_info) {
- // Provide defaults.
- $field_info += array(
- 'settings' => array(),
- 'instance_settings' => array(),
- );
- $info['field types'][$name] = $field_info;
- $info['field types'][$name]['module'] = $module;
- }
- }
- drupal_alter('field_info', $info['field types']);
- // Populate widget types.
- foreach (module_implements('field_widget_info') as $module) {
- $widget_types = (array) module_invoke($module, 'field_widget_info');
- foreach ($widget_types as $name => $widget_info) {
- // Provide defaults.
- $widget_info += array(
- 'settings' => array(),
- );
- $info['widget types'][$name] = $widget_info;
- $info['widget types'][$name]['module'] = $module;
- }
- }
- drupal_alter('field_widget_info', $info['widget types']);
- uasort($info['widget types'], 'drupal_sort_weight');
- // Populate formatter types.
- foreach (module_implements('field_formatter_info') as $module) {
- $formatter_types = (array) module_invoke($module, 'field_formatter_info');
- foreach ($formatter_types as $name => $formatter_info) {
- // Provide defaults.
- $formatter_info += array(
- 'settings' => array(),
- );
- $info['formatter types'][$name] = $formatter_info;
- $info['formatter types'][$name]['module'] = $module;
- }
- }
- drupal_alter('field_formatter_info', $info['formatter types']);
- // Populate storage types.
- foreach (module_implements('field_storage_info') as $module) {
- $storage_types = (array) module_invoke($module, 'field_storage_info');
- foreach ($storage_types as $name => $storage_info) {
- // Provide defaults.
- $storage_info += array(
- 'settings' => array(),
- );
- $info['storage types'][$name] = $storage_info;
- $info['storage types'][$name]['module'] = $module;
- }
- }
- drupal_alter('field_storage_info', $info['storage types']);
- // Set the cache if we can acquire a lock.
- if (lock_acquire("field_info_types:$langcode")) {
- cache_set("field_info_types:$langcode", $info, 'cache_field');
- lock_release("field_info_types:$langcode");
- }
- }
- }
- return $info;
- }
- /**
- * Prepares a field definition for the current run-time context.
- *
- * The functionality has moved to the FieldInfo class. This function is kept as
- * a backwards-compatibility layer. See http://drupal.org/node/1915646.
- *
- * @see FieldInfo::prepareField()
- */
- function _field_info_prepare_field($field) {
- $cache = _field_info_field_cache();
- return $cache->prepareField($field);
- }
- /**
- * Prepares an instance definition for the current run-time context.
- *
- * The functionality has moved to the FieldInfo class. This function is kept as
- * a backwards-compatibility layer. See http://drupal.org/node/1915646.
- *
- * @see FieldInfo::prepareInstance()
- */
- function _field_info_prepare_instance($instance, $field) {
- $cache = _field_info_field_cache();
- return $cache->prepareInstance($instance, $field['type']);
- }
- /**
- * Adapts display specifications to the current run-time context.
- *
- * The functionality has moved to the FieldInfo class. This function is kept as
- * a backwards-compatibility layer. See http://drupal.org/node/1915646.
- *
- * @see FieldInfo::prepareInstanceDisplay()
- */
- function _field_info_prepare_instance_display($field, $display) {
- $cache = _field_info_field_cache();
- return $cache->prepareInstanceDisplay($display, $field['type']);
- }
- /**
- * Prepares widget specifications for the current run-time context.
- *
- * The functionality has moved to the FieldInfo class. This function is kept as
- * a backwards-compatibility layer. See http://drupal.org/node/1915646.
- *
- * @see FieldInfo::prepareInstanceWidget()
- */
- function _field_info_prepare_instance_widget($field, $widget) {
- $cache = _field_info_field_cache();
- return $cache->prepareInstanceWidget($widget, $field['type']);
- }
- /**
- * Prepares 'extra fields' for the current run-time context.
- *
- * The functionality has moved to the FieldInfo class. This function is kept as
- * a backwards-compatibility layer. See http://drupal.org/node/1915646.
- *
- * @see FieldInfo::prepareExtraFields()
- */
- function _field_info_prepare_extra_fields($extra_fields, $entity_type, $bundle) {
- $cache = _field_info_field_cache();
- return $cache->prepareExtraFields($extra_fields, $entity_type, $bundle);
- }
- /**
- * Determines the behavior of a widget with respect to an operation.
- *
- * @param $op
- * The name of the operation. Currently supported: 'default value',
- * 'multiple values'.
- * @param $instance
- * The field instance array.
- *
- * @return
- * One of these values:
- * - FIELD_BEHAVIOR_NONE: Do nothing for this operation.
- * - FIELD_BEHAVIOR_CUSTOM: Use the widget's callback function.
- * - FIELD_BEHAVIOR_DEFAULT: Use field.module default behavior.
- */
- function field_behaviors_widget($op, $instance) {
- $info = field_info_widget_types($instance['widget']['type']);
- return isset($info['behaviors'][$op]) ? $info['behaviors'][$op] : FIELD_BEHAVIOR_DEFAULT;
- }
- /**
- * Returns information about field types from hook_field_info().
- *
- * @param $field_type
- * (optional) A field type name. If omitted, all field types will be
- * returned.
- *
- * @return
- * Either a field type description, as provided by hook_field_info(), or an
- * array of all existing field types, keyed by field type name.
- */
- function field_info_field_types($field_type = NULL) {
- $info = _field_info_collate_types();
- $field_types = $info['field types'];
- if ($field_type) {
- if (isset($field_types[$field_type])) {
- return $field_types[$field_type];
- }
- }
- else {
- return $field_types;
- }
- }
- /**
- * Returns information about field widgets from hook_field_widget_info().
- *
- * @param $widget_type
- * (optional) A widget type name. If omitted, all widget types will be
- * returned.
- *
- * @return
- * Either a single widget type description, as provided by
- * hook_field_widget_info(), or an array of all existing widget types, keyed
- * by widget type name.
- */
- function field_info_widget_types($widget_type = NULL) {
- $info = _field_info_collate_types();
- $widget_types = $info['widget types'];
- if ($widget_type) {
- if (isset($widget_types[$widget_type])) {
- return $widget_types[$widget_type];
- }
- }
- else {
- return $widget_types;
- }
- }
- /**
- * Returns information about field formatters from hook_field_formatter_info().
- *
- * @param $formatter_type
- * (optional) A formatter type name. If omitted, all formatter types will be
- * returned.
- *
- * @return
- * Either a single formatter type description, as provided by
- * hook_field_formatter_info(), or an array of all existing formatter types,
- * keyed by formatter type name.
- */
- function field_info_formatter_types($formatter_type = NULL) {
- $info = _field_info_collate_types();
- $formatter_types = $info['formatter types'];
- if ($formatter_type) {
- if (isset($formatter_types[$formatter_type])) {
- return $formatter_types[$formatter_type];
- }
- }
- else {
- return $formatter_types;
- }
- }
- /**
- * Returns information about field storage from hook_field_storage_info().
- *
- * @param $storage_type
- * (optional) A storage type name. If omitted, all storage types will be
- * returned.
- *
- * @return
- * Either a storage type description, as provided by
- * hook_field_storage_info(), or an array of all existing storage types,
- * keyed by storage type name.
- */
- function field_info_storage_types($storage_type = NULL) {
- $info = _field_info_collate_types();
- $storage_types = $info['storage types'];
- if ($storage_type) {
- if (isset($storage_types[$storage_type])) {
- return $storage_types[$storage_type];
- }
- }
- else {
- return $storage_types;
- }
- }
- /**
- * Returns information about existing bundles.
- *
- * @param $entity_type
- * The type of entity; e.g. 'node' or 'user'.
- *
- * @return
- * An array of bundles for the $entity_type keyed by bundle name,
- * or, if no $entity_type was provided, the array of all existing bundles,
- * keyed by entity type.
- */
- function field_info_bundles($entity_type = NULL) {
- $info = entity_get_info();
- if ($entity_type) {
- return isset($info[$entity_type]['bundles']) ? $info[$entity_type]['bundles'] : array();
- }
- $bundles = array();
- foreach ($info as $type => $entity_info) {
- $bundles[$type] = $entity_info['bundles'];
- }
- return $bundles;
- }
- /**
- * Returns a lightweight map of fields across bundles.
- *
- * The function only returns active, non deleted fields.
- *
- * @return
- * An array keyed by field name. Each value is an array with two entries:
- * - type: The field type.
- * - bundles: The bundles in which the field appears, as an array with entity
- * types as keys and the array of bundle names as values.
- * Example:
- * @code
- * array(
- * 'body' => array(
- * 'bundles' => array(
- * 'node' => array('page', 'article'),
- * ),
- * 'type' => 'text_with_summary',
- * ),
- * );
- * @endcode
- */
- function field_info_field_map() {
- $cache = _field_info_field_cache();
- return $cache->getFieldMap();
- }
- /**
- * Returns all field definitions.
- *
- * Use of this function should be avoided when possible, since it loads and
- * statically caches a potentially large array of information. Use
- * field_info_field_map() instead.
- *
- * When iterating over the fields present in a given bundle after a call to
- * field_info_instances($entity_type, $bundle), it is recommended to use
- * field_info_field() on each individual field instead.
- *
- * @return
- * An array of field definitions, keyed by field name. Each field has an
- * additional property, 'bundles', which is an array of all the bundles to
- * which this field belongs keyed by entity type.
- *
- * @see field_info_field_map()
- */
- function field_info_fields() {
- $cache = _field_info_field_cache();
- $info = $cache->getFields();
- $fields = array();
- foreach ($info as $key => $field) {
- if (!$field['deleted']) {
- $fields[$field['field_name']] = $field;
- }
- }
- return $fields;
- }
- /**
- * Returns data about an individual field, given a field name.
- *
- * @param $field_name
- * The name of the field to retrieve. $field_name can only refer to a
- * non-deleted, active field. For deleted fields, use
- * field_info_field_by_id(). To retrieve information about inactive fields,
- * use field_read_fields().
- *
- * @return
- * The field array, as returned by field_read_fields(), with an
- * additional element 'bundles', whose value is an array of all the bundles
- * this field belongs to keyed by entity type. NULL if the field was not
- * found.
- *
- * @see field_info_field_by_id()
- */
- function field_info_field($field_name) {
- $cache = _field_info_field_cache();
- return $cache->getField($field_name);
- }
- /**
- * Returns data about an individual field, given a field ID.
- *
- * @param $field_id
- * The id of the field to retrieve. $field_id can refer to a
- * deleted field, but not an inactive one.
- *
- * @return
- * The field array, as returned by field_read_fields(), with an
- * additional element 'bundles', whose value is an array of all the bundles
- * this field belongs to.
- *
- * @see field_info_field()
- */
- function field_info_field_by_id($field_id) {
- $cache = _field_info_field_cache();
- return $cache->getFieldById($field_id);
- }
- /**
- * Returns the same data as field_info_field_by_id() for every field.
- *
- * Use of this function should be avoided when possible, since it loads and
- * statically caches a potentially large array of information.
- *
- * When iterating over the fields present in a given bundle after a call to
- * field_info_instances($entity_type, $bundle), it is recommended to use
- * field_info_field() on each individual field instead.
- *
- * @return
- * An array, each key is a field ID and the values are field arrays as
- * returned by field_read_fields(), with an additional element 'bundles',
- * whose value is an array of all the bundle this field belongs to.
- *
- * @see field_info_field()
- * @see field_info_field_by_id()
- */
- function field_info_field_by_ids() {
- $cache = _field_info_field_cache();
- return $cache->getFields();
- }
- /**
- * Retrieves information about field instances.
- *
- * Use of this function to retrieve instances across separate bundles (i.e.
- * when the $bundle parameter is NULL) should be avoided when possible, since
- * it loads and statically caches a potentially large array of information. Use
- * field_info_field_map() instead.
- *
- * When retrieving the instances of a specific bundle (i.e. when both
- * $entity_type and $bundle_name are provided), the function also populates a
- * static cache with the corresponding field definitions, allowing fast
- * retrieval of field_info_field() later in the request.
- *
- * @param $entity_type
- * (optional) The entity type for which to return instances.
- * @param $bundle_name
- * (optional) The bundle name for which to return instances. If $entity_type
- * is NULL, the $bundle_name parameter is ignored.
- *
- * @return
- * If $entity_type is not set, return all instances keyed by entity type and
- * bundle name. If $entity_type is set, return all instances for that entity
- * type, keyed by bundle name. If $entity_type and $bundle_name are set, return
- * all instances for that bundle.
- *
- * @see field_info_field_map()
- */
- function field_info_instances($entity_type = NULL, $bundle_name = NULL) {
- $cache = _field_info_field_cache();
- if (!isset($entity_type)) {
- return $cache->getInstances();
- }
- if (!isset($bundle_name)) {
- return $cache->getInstances($entity_type);
- }
- return $cache->getBundleInstances($entity_type, $bundle_name);
- }
- /**
- * Returns an array of instance data for a specific field and bundle.
- *
- * The function populates a static cache with all fields and instances used in
- * the bundle, allowing fast retrieval of field_info_field() or
- * field_info_instance() later in the request.
- *
- * @param $entity_type
- * The entity type for the instance.
- * @param $field_name
- * The field name for the instance.
- * @param $bundle_name
- * The bundle name for the instance.
- *
- * @return
- * An associative array of instance data for the specific field and bundle;
- * NULL if the instance does not exist.
- */
- function field_info_instance($entity_type, $field_name, $bundle_name) {
- $cache = _field_info_field_cache();
- $info = $cache->getBundleInstances($entity_type, $bundle_name);
- if (isset($info[$field_name])) {
- return $info[$field_name];
- }
- }
- /**
- * Returns a list and settings of pseudo-field elements in a given bundle.
- *
- * If $context is 'form', an array with the following structure:
- * @code
- * array(
- * 'name_of_pseudo_field_component' => array(
- * 'label' => The human readable name of the component,
- * 'description' => A short description of the component content,
- * 'weight' => The weight of the component in edit forms,
- * ),
- * 'name_of_other_pseudo_field_component' => array(
- * // ...
- * ),
- * );
- * @endcode
- *
- * If $context is 'display', an array with the following structure:
- * @code
- * array(
- * 'name_of_pseudo_field_component' => array(
- * 'label' => The human readable name of the component,
- * 'description' => A short description of the component content,
- * // One entry per view mode, including the 'default' mode:
- * 'display' => array(
- * 'default' => array(
- * 'weight' => The weight of the component in displayed entities in
- * this view mode,
- * 'visible' => TRUE if the component is visible, FALSE if hidden, in
- * displayed entities in this view mode,
- * ),
- * 'teaser' => array(
- * // ...
- * ),
- * ),
- * ),
- * 'name_of_other_pseudo_field_component' => array(
- * // ...
- * ),
- * );
- * @endcode
- *
- * @param $entity_type
- * The type of entity; e.g. 'node' or 'user'.
- * @param $bundle
- * The bundle name.
- * @param $context
- * The context for which the list of pseudo-fields is requested. Either
- * 'form' or 'display'.
- *
- * @return
- * The array of pseudo-field elements in the bundle.
- */
- function field_info_extra_fields($entity_type, $bundle, $context) {
- $cache = _field_info_field_cache();
- $info = $cache->getBundleExtraFields($entity_type, $bundle);
- return isset($info[$context]) ? $info[$context] : array();
- }
- /**
- * Returns the maximum weight of all the components in an entity.
- *
- * This includes fields, 'extra_fields', and other components added by
- * third-party modules (e.g. field_group).
- *
- * @param $entity_type
- * The type of entity; e.g. 'node' or 'user'.
- * @param $bundle
- * The bundle name.
- * @param $context
- * The context for which the maximum weight is requested. Either 'form', or
- * the name of a view mode.
- * @return
- * The maximum weight of the entity's components, or NULL if no components
- * were found.
- */
- function field_info_max_weight($entity_type, $bundle, $context) {
- $weights = array();
- // Collect weights for fields.
- foreach (field_info_instances($entity_type, $bundle) as $instance) {
- if ($context == 'form') {
- $weights[] = $instance['widget']['weight'];
- }
- elseif (isset($instance['display'][$context]['weight'])) {
- $weights[] = $instance['display'][$context]['weight'];
- }
- }
- // Collect weights for extra fields.
- foreach (field_info_extra_fields($entity_type, $bundle, $context) as $extra) {
- $weights[] = $extra['weight'];
- }
- // Let other modules feedback about their own additions.
- $weights = array_merge($weights, module_invoke_all('field_info_max_weight', $entity_type, $bundle, $context));
- $max_weight = $weights ? max($weights) : NULL;
- return $max_weight;
- }
- /**
- * Returns a field type's default settings.
- *
- * @param $type
- * A field type name.
- *
- * @return
- * The field type's default settings, as provided by hook_field_info(), or an
- * empty array if type or settings are not defined.
- */
- function field_info_field_settings($type) {
- $info = field_info_field_types($type);
- return isset($info['settings']) ? $info['settings'] : array();
- }
- /**
- * Returns a field type's default instance settings.
- *
- * @param $type
- * A field type name.
- *
- * @return
- * The field type's default instance settings, as provided by
- * hook_field_info(), or an empty array if type or settings are not defined.
- */
- function field_info_instance_settings($type) {
- $info = field_info_field_types($type);
- return isset($info['instance_settings']) ? $info['instance_settings'] : array();
- }
- /**
- * Returns a field widget's default settings.
- *
- * @param $type
- * A widget type name.
- *
- * @return
- * The widget type's default settings, as provided by
- * hook_field_widget_info(), or an empty array if type or settings are
- * undefined.
- */
- function field_info_widget_settings($type) {
- $info = field_info_widget_types($type);
- return isset($info['settings']) ? $info['settings'] : array();
- }
- /**
- * Returns a field formatter's default settings.
- *
- * @param $type
- * A field formatter type name.
- *
- * @return
- * The formatter type's default settings, as provided by
- * hook_field_formatter_info(), or an empty array if type or settings are
- * undefined.
- */
- function field_info_formatter_settings($type) {
- $info = field_info_formatter_types($type);
- return isset($info['settings']) ? $info['settings'] : array();
- }
- /**
- * Returns a field storage type's default settings.
- *
- * @param $type
- * A field storage type name.
- *
- * @return
- * The storage type's default settings, as provided by
- * hook_field_storage_info(), or an empty array if type or settings are
- * undefined.
- */
- function field_info_storage_settings($type) {
- $info = field_info_storage_types($type);
- return isset($info['settings']) ? $info['settings'] : array();
- }
- /**
- * @} End of "defgroup field_info".
- */
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