Club Drupal

<?php

/**

 * @file

 * Field related hook implementations for the AddThis-module.

 */

/**

 * Implements hook_field_info().

 */

function addthis_field_info() {

  return array(

    AddThis::FIELD_TYPE => array(

      'label' => t('AddThis'),

      'description' => t('This field stores addthis settings in the database.'),

      'settings' => array('max_length' => 255),

      'default_widget' => AddThis::WIDGET_TYPE,

      'default_formatter' => AddThis::WIDGET_TYPE_DISABLED,

    ),

  );

}

/**

 * Implements hook_field_is_empty().

 */

function addthis_field_is_empty($item, $field) {

  return empty($item['value']) && (string) $item['value'] !== '0';

}

/**

 * Implements hook_field_formatter_info().

 *

 * Creates a formatter element for all the default formatter types.

 */

function addthis_field_formatter_info() {

  $formatters = array();

  foreach (AddThis::getInstance()->getDefaultFormatterTypes() as $key => $label) {

    $formatters[$key] = array(

      'label' => $label,

      'field types' => array(AddThis::FIELD_TYPE),

    );

  }

  return $formatters;

}

/**

 * Implementation to retrieve formatters for a given type of field.

 */

function _addthis_field_info_formatter_field_type($field_type = NULL) {

  $formatters = field_info_formatter_types();

  foreach ($formatters as $key => $formatter) {

    if (!in_array((!isset($field_type) ? AddThis::FIELD_TYPE : $field_type), $formatter['field types'])) {

      unset($formatters[$key]);

    }

  }

  return $formatters;

}

/**

 * Implements hook_field_formatter_view().

 */

function addthis_field_formatter_view($entity_type, $entity, $field, $instance, $langcode, $items, $display) {

  return addthis_render_formatter_view($entity_type, $entity, $field, $instance, $langcode, $items, $display);

}

// There is only one item to display, the share item.

// Get the markup for the display type and add that to the $element[0] to display.

function addthis_render_formatter_view($entity_type, $entity, $field, $instance, $langcode, $items, $display) {

  $element = array();

  $display_type = $display['type'];

  $options = array(

    '#entity_type' => $entity_type,

    '#entity' => $entity,

    '#display' => $display,

  );

  $markup = AddThis::getInstance()->getDisplayMarkup($display_type, $options);

  if (!isset($element[0])) {

    $element[0] = $markup;

  }

  return $element;

}

/**

 * Implements hook_field_prepare_view().

 *

 * Adds a dummy value in AddThis field for nodes that do not have any value for

 * the field to make rendering possible.

 */

function addthis_field_prepare_view($entity_type, $entities, $field, $instances, $langcode, &$items) {

  foreach ($items as $key => $item) {

    if (!isset($item[0]['value'])) {

      $items[$key][0]['value'] = 'Dummy value';

    }

  }

}

/**

 * Implements hook_field_presave().

 *

 * Adds a dummy value to $items to make rendering possible.

 */

function addthis_field_presave($entity_type, $entity, $field, $instance, $langcode, &$items) {

  $dummy_value = 'Dummy value';

  if (count($items) == 0) {

    $items += array(array('value' => $dummy_value));

  }

  else {

    foreach ($items as $delta => $value) {

      $items[$delta]['value'] = $dummy_value;

    }

  }

}

/**

 * Implements hook_field_widget_info().

 */

function addthis_field_widget_info() {

  return array(

    AddThis::WIDGET_TYPE => array(

      'label' => t('AddThis button'),

      'field types' => array(AddThis::FIELD_TYPE),

    ),

  );

}

/**

 * Implements hook_field_widget_form().

 *

 * The AddThis field is a placeholder field and has no widget settings.

 * To suppress the form, #access is set to FALSE.

 */

function addthis_field_widget_form(&$form, &$form_state, $field, $instance, $langcode, $items, $delta, $element) {

  if ($instance['widget']['type'] == AddThis::WIDGET_TYPE) {

    $main_widget = $element + array(

      '#access' => FALSE,

    );

    $element['value'] = $main_widget;

  }

  return $element;

}

/**

 * Implements hook_field_widget_error().

 */

function addthis_field_widget_error($element, $error, $form, &$form_state) {

  switch ($error['error']) {

    default:

      $error_element = $element[$element['#columns'][0]];

      break;

  }

  form_error($error_element, $error['message']);

}