269 lines
9.8 KiB
PHP
269 lines
9.8 KiB
PHP
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<?php
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/**
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* @file
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* Default 'implementations' of hook_field_*(): common field housekeeping.
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*
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* Those implementations are special, as field.module does not define any field
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* types. Those functions take care of default stuff common to all field types.
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* They are called through the _field_invoke_default() iterator, generally in
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* the corresponding field_attach_[operation]() function.
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*/
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/**
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* Extracts field values from submitted form values.
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*
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* @param $entity_type
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* The type of $entity.
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* @param $entity
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* The entity for the operation.
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* @param $field
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* The field structure for the operation.
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* @param $instance
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* The instance structure for $field on $entity's bundle.
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* @param $langcode
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* The language associated to $items.
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* @param $items
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* The field values. This parameter is altered by reference to receive the
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* incoming form values.
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* @param $form
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* The form structure where field elements are attached to. This might be a
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* full form structure, or a sub-element of a larger form.
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* @param $form_state
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* The form state.
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*/
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function field_default_extract_form_values($entity_type, $entity, $field, $instance, $langcode, &$items, $form, &$form_state) {
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$path = array_merge($form['#parents'], array($field['field_name'], $langcode));
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$key_exists = NULL;
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$values = drupal_array_get_nested_value($form_state['values'], $path, $key_exists);
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if ($key_exists) {
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// Remove the 'value' of the 'add more' button.
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unset($values['add_more']);
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$items = $values;
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}
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}
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/**
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* Generic field validation handler.
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*
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* Possible error codes:
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* - 'field_cardinality': The number of values exceeds the field cardinality.
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*
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* @see _hook_field_validate()
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*
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* @param $entity_type
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* The type of $entity.
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* @param $entity
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* The entity for the operation.
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* @param $field
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* The field structure for the operation.
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* @param $instance
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* The instance structure for $field on $entity's bundle.
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* @param $langcode
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* The language associated to $items.
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* @param $items
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* $entity->{$field['field_name']}[$langcode], or an empty array if unset.
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* @param $errors
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* The array of errors, keyed by field name and by value delta, that have
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* already been reported for the entity. The function should add its errors
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* to this array. Each error is an associative array, with the following
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* keys and values:
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* - 'error': an error code (should be a string, prefixed with the module name)
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* - 'message': the human readable message to be displayed.
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*/
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function field_default_validate($entity_type, $entity, $field, $instance, $langcode, $items, &$errors) {
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// Filter out empty values.
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$items = _field_filter_items($field, $items);
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// Check that the number of values doesn't exceed the field cardinality.
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// For form submitted values, this can only happen with 'multiple value'
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// widgets.
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if ($field['cardinality'] != FIELD_CARDINALITY_UNLIMITED && count($items) > $field['cardinality']) {
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$errors[$field['field_name']][$langcode][0][] = array(
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'error' => 'field_cardinality',
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'message' => t('%name: this field cannot hold more than @count values.', array('%name' => $instance['label'], '@count' => $field['cardinality'])),
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);
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}
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}
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function field_default_submit($entity_type, $entity, $field, $instance, $langcode, &$items, $form, &$form_state) {
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// Filter out empty values.
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$items = _field_filter_items($field, $items);
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// Reorder items to account for drag-n-drop reordering.
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$items = _field_sort_items($field, $items);
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}
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/**
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* Default field 'insert' operation.
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*
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* Insert default value if no $entity->$field_name entry was provided.
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* This can happen with programmatic saves, or on form-based creation where
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* the current user doesn't have 'edit' permission for the field.
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*/
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function field_default_insert($entity_type, $entity, $field, $instance, $langcode, &$items) {
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// _field_invoke() populates $items with an empty array if the $entity has no
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// entry for the field, so we check on the $entity itself.
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// We also check that the current field translation is actually defined before
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// assigning it a default value. This way we ensure that only the intended
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// languages get a default value. Otherwise we could have default values for
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// not yet open languages.
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if (empty($entity) || !property_exists($entity, $field['field_name']) ||
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(isset($entity->{$field['field_name']}[$langcode]) && count($entity->{$field['field_name']}[$langcode]) == 0)) {
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$items = field_get_default_value($entity_type, $entity, $field, $instance, $langcode);
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}
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}
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/**
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* Invokes hook_field_formatter_prepare_view() on the relevant formatters.
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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 $entities
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* An array of entities being displayed, keyed by entity id.
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* @param $field
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* The field structure for the operation.
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* @param $instances
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* Array of instance structures for $field for each entity, keyed by entity
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* id.
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* @param $langcode
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* The language associated to $items.
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* @param $items
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* Array of field values already loaded for the entities, keyed by entity id.
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* @param $display
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* Can be either:
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* - the name of a view mode
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* - or an array of display settings to use for display, as found in the
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* 'display' entry of $instance definitions.
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*/
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function field_default_prepare_view($entity_type, $entities, $field, $instances, $langcode, &$items, $display) {
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// Group entities, instances and items by formatter module.
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$modules = array();
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foreach ($instances as $id => $instance) {
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if (is_string($display)) {
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$view_mode = $display;
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$instance_display = field_get_display($instance, $view_mode, $entities[$id]);
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}
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else {
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$instance_display = $display;
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}
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if ($instance_display['type'] !== 'hidden') {
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$module = $instance_display['module'];
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$modules[$module] = $module;
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$grouped_entities[$module][$id] = $entities[$id];
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$grouped_instances[$module][$id] = $instance;
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$grouped_displays[$module][$id] = $instance_display;
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// hook_field_formatter_prepare_view() alters $items by reference.
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$grouped_items[$module][$id] = &$items[$id];
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}
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}
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foreach ($modules as $module) {
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// Invoke hook_field_formatter_prepare_view().
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$function = $module . '_field_formatter_prepare_view';
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if (function_exists($function)) {
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$function($entity_type, $grouped_entities[$module], $field, $grouped_instances[$module], $langcode, $grouped_items[$module], $grouped_displays[$module]);
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}
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}
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}
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/**
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* Builds a renderable array for one field on one entity instance.
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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 $entity
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* A single object of type $entity_type.
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* @param $field
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* The field structure for the operation.
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* @param $instance
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* An array containing each field on $entity's bundle.
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* @param $langcode
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* The language associated to $items.
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* @param $items
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* Array of field values already loaded for the entities, keyed by entity id.
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* @param $display
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* Can be either:
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* - the name of a view mode;
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* - or an array of custom display settings, as found in the 'display' entry
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* of $instance definitions.
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*/
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function field_default_view($entity_type, $entity, $field, $instance, $langcode, $items, $display) {
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list($id, $vid, $bundle) = entity_extract_ids($entity_type, $entity);
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$addition = array();
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// Prepare incoming display specifications.
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if (is_string($display)) {
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$view_mode = $display;
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$display = field_get_display($instance, $view_mode, $entity);
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}
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else {
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$view_mode = '_custom_display';
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}
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if ($display['type'] !== 'hidden') {
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// Calling the formatter function through module_invoke() can have a
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// performance impact on pages with many fields and values.
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$function = $display['module'] . '_field_formatter_view';
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if (function_exists($function)) {
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$elements = $function($entity_type, $entity, $field, $instance, $langcode, $items, $display);
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if ($elements) {
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$info = array(
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'#theme' => 'field',
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'#weight' => $display['weight'],
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'#title' => $instance['label'],
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'#access' => field_access('view', $field, $entity_type, $entity),
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'#label_display' => $display['label'],
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'#view_mode' => $view_mode,
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'#language' => $langcode,
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'#field_name' => $field['field_name'],
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'#field_type' => $field['type'],
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'#field_translatable' => $field['translatable'],
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'#entity_type' => $entity_type,
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'#bundle' => $bundle,
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'#object' => $entity,
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'#items' => $items,
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'#formatter' => $display['type']
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);
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$addition[$field['field_name']] = array_merge($info, $elements);
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}
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}
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}
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return $addition;
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}
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/**
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* Copies source field values into the entity to be prepared.
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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 $entity
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* The entity to be prepared for translation.
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* @param $field
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* The field structure for the operation.
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* @param $instance
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* The instance structure for $field on $entity's bundle.
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* @param $langcode
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* The language the entity has to be translated in.
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* @param $items
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* $entity->{$field['field_name']}[$langcode], or an empty array if unset.
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* @param $source_entity
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* The source entity holding the field values to be translated.
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* @param $source_langcode
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* The source language from which translate.
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*/
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function field_default_prepare_translation($entity_type, $entity, $field, $instance, $langcode, &$items, $source_entity, $source_langcode) {
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$field_name = $field['field_name'];
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// If the field is untranslatable keep using LANGUAGE_NONE.
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if ($langcode == LANGUAGE_NONE) {
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$source_langcode = LANGUAGE_NONE;
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}
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if (isset($source_entity->{$field_name}[$source_langcode])) {
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$items = $source_entity->{$field_name}[$source_langcode];
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}
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}
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