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<?php
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/**
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* @file
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* Provide diff field functions for the List module.
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*/
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/**
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* Diff field callback for parsing list field comparative values.
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*/
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function list_field_diff_view($items, $context) {
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$field = $context['field'];
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$instance = $context['instance'];
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$settings = $context['settings'];
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$diff_items = array();
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$allowed_values = list_allowed_values($field, $instance, $context['entity_type'], $context['entity']);
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foreach ($items as $delta => $item) {
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// Fairly complex condition to prevent duplicate "key (key)" type rendering.
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if (isset($allowed_values[$item['value']]) &&
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$allowed_values[$item['value']] != $item['value'] &&
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strlen($allowed_values[$item['value']])) {
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switch ($settings['compare']) {
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case 'both':
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$diff_items[$delta] = $allowed_values[$item['value']] . ' (' . $item['value'] . ')';
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break;
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case 'label':
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$diff_items[$delta] = $allowed_values[$item['value']];
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break;
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default:
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$diff_items[$delta] = $item['value'];
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break;
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}
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}
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else {
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// If no match was found for the label, fall back to the key.
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$diff_items[$delta] = $item['value'];
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}
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}
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return $diff_items;
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}
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/**
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* Provide default field comparison options.
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*/
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function list_field_diff_default_options($field_type) {
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return array(
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'compare' => 'label',
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);
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}
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/**
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* Provide a form for setting the field comparison options.
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*/
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function list_field_diff_options_form($field_type, $settings) {
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$options_form = array();
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$options_form['compare'] = array(
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'#type' => 'radios',
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'#title' => t('Comparison method'),
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'#options' => array(
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'label' => t('Label'),
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'key' => t('Key'),
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'both' => t('Label (key)'),
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),
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'#default_value' => $settings['compare'],
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);
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return $options_form;
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}
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