models); drupal_alter($hooks, $object); $markup = call_user_func($viewers[$viewer]['metadata callback'], $object, $print); // The callback doesn't have any markup provided for this particular object, // default back to the dublin_core display. if ($markup === FALSE) { $markup = call_user_func($viewers['dublin_core']['metadata callback'], $object, $print); } } return $markup; } /** * Retrieves the metadata display description for an Islandora object. * * @param AbstractObject $object * An AbstractObject representing an object within Fedora. * * @return string * Markup to be rendered for description on Islandora object pages. */ function islandora_retrieve_description_markup(AbstractObject $object) { $viewers = module_invoke_all('islandora_metadata_display_info'); $viewer = variable_get('islandora_metadata_display', 'dublin_core'); $markup = ''; if (isset($viewers[$viewer]['description callback'])) { $hooks = islandora_build_hook_list(ISLANDORA_METADATA_OBJECT_DESCRIPTION_ALTER, $object->models); drupal_alter($hooks, $object); $markup = call_user_func($viewers[$viewer]['description callback'], $object); // The callback doesn't have any markup provided for this particular object, // default back to the dublin_core display. if ($markup === FALSE) { $markup = call_user_func($viewers['dublin_core']['description callback'], $object); } } return $markup; } /** * Form used for choosing which default metadata display to use for viewing. * * @param array $form * An array representing a Drupal form. * @param array $form_state * An array containing the Drupal form state. * * @return array * An array representing the metadata display viewer form. */ function islandora_metadata_display_form($form, $form_state) { module_load_include('inc', 'islandora', 'includes/solution_packs.inc'); $form = array(); $defined_displays = module_invoke_all('islandora_metadata_display_info'); if (!empty($defined_displays)) { $no_viewer = array(); $no_viewer['none'] = array( 'label' => t('None'), 'description' => t("Don't show any metadata for displaying"), ); $viewers = array_merge_recursive($no_viewer, $defined_displays); $form['viewers'] = array( '#type' => 'item', '#title' => t('Select a viewer'), '#description' => t('Preferred metadata display for Islandora. These may be provided by third-party modules.'), '#tree' => TRUE, '#theme' => 'islandora_viewers_table', ); foreach ($viewers as $name => $profile) { $options[$name] = ''; $form['viewers']['name'][$name] = array( '#type' => 'hidden', '#value' => $name, ); $form['viewers']['label'][$name] = array( '#type' => 'item', '#markup' => $profile['label'], ); $form['viewers']['description'][$name] = array( '#type' => 'item', '#markup' => $profile['description'], ); $form['viewers']['configuration'][$name] = array( '#type' => 'item', '#markup' => (isset($profile['configuration']) AND $profile['configuration'] != '') ? l(t('configure'), $profile['configuration']) : '', ); } $form['viewers']['default'] = array( '#type' => 'radios', '#options' => isset($options) ? $options : array(), '#default_value' => variable_get('islandora_metadata_display', 'dublin_core'), ); } else { $form['viewers']['no_viewers'] = array( '#markup' => t('No viewers detected.'), ); } $form['submit'] = array( '#type' => 'submit', '#value' => t('Save configuration'), ); return $form; } /** * Submit handler for the metadata display form which sets the default viewer. * * @param array $form * An array representing a Drupal form. * @param array $form_state * An array containing the Drupal form state. */ function islandora_metadata_display_form_submit($form, $form_state) { variable_set('islandora_metadata_display', $form_state['values']['viewers']['default']); drupal_set_message(t('The configuration options have been saved.')); } /** * Metadata display callback for rendering Dublin Core metadata. * * @param AbstractObject $object * An AbstractObject representing an object within Fedora. * @param bool $print * Whether the display is being printed or not. * * @return string * Markup representing the rendered metadata from Dublin Core. */ function islandora_metadata_display_callback(AbstractObject $object, $print = FALSE) { $elements = array( 'islandora_object' => $object, 'print' => $print, ); return theme('islandora_dublin_core_display', $elements); } /** * Metadata description callback for rendering Dublin Core description. * * @param AbstractObject $islandora_object * An AbstractObject representing an object within Fedora. * * @return string * Markup representing the rendered metadata from Dublin Core. */ function islandora_metadata_description_callback(AbstractObject $islandora_object) { $elements = array( 'islandora_object' => $islandora_object, ); return theme('islandora_dublin_core_description', $elements); }