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<?php
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/**
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* @file
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* Provide diff field functions for the Field Collection.
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*/
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/**
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* Diff field callback for parsing Field Collection fields comparative values.
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*/
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function field_collection_field_diff_view($items, $context) {
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$diff_items = array();
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foreach ($items as $delta => $item) {
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$diff_items[$delta] = field_collection_field_render_revision($item, $context);
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}
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return $diff_items;
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}
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/**
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* Renders a field collection fields revision.
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*/
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function field_collection_field_render_revision($item, $context) {
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$entity_type = 'field_collection_item';
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$bundle_name = $context['field']['field_name'];
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$view_mode = $context['view_mode'];
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$entity = entity_revision_load($entity_type, $item['revision_id']);
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if (empty($entity)) {
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return array();
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}
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$field_context = $context;
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$field_context['entity_type'] = $entity_type;
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$field_context['bundle'] = $bundle_name;
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$field_context['entity'] = $entity;
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// Some fields piggy back the display settings, so we need to fake these by
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// ensuring that the field mode is always set.
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if (empty($view_mode)) {
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$field_context['custom_settings'] = FALSE;
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}
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$view_mode_settings = field_view_mode_settings($entity_type, $bundle_name);
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$actual_mode = !empty($view_mode_settings[$view_mode]['custom_settings']) ? $view_mode : 'default';
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if (!isset($field_context['custom_settings'])) {
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$field_context['custom_settings'] = $actual_mode && $actual_mode == $view_mode;
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}
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$instances = field_info_instances($entity_type, $field_context['bundle']);
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usort($instances, '_field_collection_sort_items');
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$result = array();
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foreach ($instances as $instance) {
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// Any view mode is supported in relation to hiding fields, but only if
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// selected.
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if ($actual_mode && $instance['display'][$actual_mode]['type'] == 'hidden') {
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continue;
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}
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$field_name = $instance['field_name'];
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$field = field_info_field($field_name);
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// We provide a loose check on the field access.
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if (field_access('view', $field, $entity_type) || field_access('edit', $field, $entity_type)) {
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$langcode = !empty($entity) ? field_language($entity_type, $entity, $field_name) : LANGUAGE_NONE;
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$field_context['language'] = $langcode;
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$field_context['field'] = $field;
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$field_context['instance'] = $instance;
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$field_context['settings'] = diff_get_field_settings($field_context);
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$field_context['display'] = $instance['display'][$actual_mode];
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$old_items = array();
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$new_items = array();
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if (!empty($entity->{$field_name}[$langcode])) {
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$new_items = $entity->{$field_name}[$langcode];
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}
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$func = $field['module'] . '_field_diff_view_prepare';
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if (function_exists($func)) {
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$func($old_items, $new_items, $field_context);
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}
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$func = $field['module'] . '_field_diff_view';
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if (!function_exists($func)) {
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$func = 'diff_field_diff_view';
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}
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if (!empty($new_items)) {
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$raw_values = $func($new_items, $field_context);
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$values = array();
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foreach ($raw_values as $raw_value) {
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$values[] = is_array($raw_value) ? implode(', ', $raw_value) : $raw_value;
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}
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$result[] = check_plain($instance['label'] . ': ' . implode(', ', $values));
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}
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}
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}
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return $result;
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}
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/**
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* Sort function for items order.
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*/
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function _field_collection_sort_items($a, $b) {
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$a_weight = (!empty($a['widget']['weight']) ? $a['widget']['weight'] : 0);
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$b_weight = (!empty($b['widget']['weight']) ? $b['widget']['weight'] : 0);
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return $a_weight - $b_weight;
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}
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