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<?php
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/**
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* @file
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* Field related hook implementations for the AddThis-module.
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*/
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/**
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* Implements hook_field_info().
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*/
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function addthis_field_info() {
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return array(
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AddThis::FIELD_TYPE => array(
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'label' => t('AddThis'),
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'description' => t('This field stores addthis settings in the database.'),
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'settings' => array('max_length' => 255),
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'default_widget' => AddThis::WIDGET_TYPE,
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'default_formatter' => AddThis::WIDGET_TYPE_DISABLED,
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),
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);
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}
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/**
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* Implements hook_field_is_empty().
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*/
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function addthis_field_is_empty($item, $field) {
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return empty($item['value']) && (string) $item['value'] !== '0';
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}
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/**
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* Implements hook_field_formatter_info().
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*
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* Creates a formatter element for all the default formatter types.
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*/
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function addthis_field_formatter_info() {
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$formatters = array();
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foreach (AddThis::getInstance()->getDefaultFormatterTypes() as $key => $label) {
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$formatters[$key] = array(
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'label' => $label,
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'field types' => array(AddThis::FIELD_TYPE),
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);
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}
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return $formatters;
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}
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/**
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* Implementation to retrieve formatters for a given type of field.
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*/
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function _addthis_field_info_formatter_field_type($field_type = NULL) {
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$formatters = field_info_formatter_types();
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foreach ($formatters as $key => $formatter) {
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if (!in_array((!isset($field_type) ? AddThis::FIELD_TYPE : $field_type), $formatter['field types'])) {
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unset($formatters[$key]);
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}
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}
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return $formatters;
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}
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/**
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* Implements hook_field_formatter_view().
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*/
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function addthis_field_formatter_view($entity_type, $entity, $field, $instance, $langcode, $items, $display) {
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return addthis_render_formatter_view($entity_type, $entity, $field, $instance, $langcode, $items, $display);
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}
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// There is only one item to display, the share item.
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// Get the markup for the display type and add that to the $element[0] to display.
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function addthis_render_formatter_view($entity_type, $entity, $field, $instance, $langcode, $items, $display) {
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$element = array();
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$display_type = $display['type'];
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$options = array(
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'#entity_type' => $entity_type,
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'#entity' => $entity,
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'#display' => $display,
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);
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$markup = AddThis::getInstance()->getDisplayMarkup($display_type, $options);
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if (!isset($element[0])) {
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$element[0] = $markup;
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}
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return $element;
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}
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/**
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* Implements hook_field_prepare_view().
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*
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* Adds a dummy value in AddThis field for nodes that do not have any value for
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* the field to make rendering possible.
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*/
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function addthis_field_prepare_view($entity_type, $entities, $field, $instances, $langcode, &$items) {
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foreach ($items as $key => $item) {
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if (!isset($item[0]['value'])) {
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$items[$key][0]['value'] = 'Dummy value';
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}
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}
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}
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/**
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* Implements hook_field_presave().
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*
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* Adds a dummy value to $items to make rendering possible.
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*/
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function addthis_field_presave($entity_type, $entity, $field, $instance, $langcode, &$items) {
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$dummy_value = 'Dummy value';
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if (count($items) == 0) {
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$items += array(array('value' => $dummy_value));
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}
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else {
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foreach ($items as $delta => $value) {
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$items[$delta]['value'] = $dummy_value;
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}
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}
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}
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/**
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* Implements hook_field_widget_info().
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*/
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function addthis_field_widget_info() {
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return array(
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AddThis::WIDGET_TYPE => array(
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'label' => t('AddThis button'),
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'field types' => array(AddThis::FIELD_TYPE),
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),
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);
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}
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/**
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* Implements hook_field_widget_form().
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*
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* The AddThis field is a placeholder field and has no widget settings.
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* To suppress the form, #access is set to FALSE.
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*/
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function addthis_field_widget_form(&$form, &$form_state, $field, $instance, $langcode, $items, $delta, $element) {
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if ($instance['widget']['type'] == AddThis::WIDGET_TYPE) {
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$main_widget = $element + array(
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'#access' => FALSE,
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);
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$element['value'] = $main_widget;
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}
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return $element;
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}
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/**
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* Implements hook_field_widget_error().
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*/
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function addthis_field_widget_error($element, $error, $form, &$form_state) {
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switch ($error['error']) {
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default:
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$error_element = $element[$element['#columns'][0]];
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break;
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}
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form_error($error_element, $error['message']);
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}
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