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<?php
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/**
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* @file
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* Provide diff field functions for the image module.
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*/
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/**
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* Diff field callback for preloading the image file entities.
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*/
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function image_field_diff_view_prepare(&$old_items, &$new_items, $context) {
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$fids = array();
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foreach (array_merge_recursive($old_items, $new_items) as $info) {
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$fids[$info['fid']] = $info['fid'];
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}
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$files = file_load_multiple($fids);
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foreach ($old_items as $delta => $info) {
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$old_items[$delta]['file'] = isset($files[$info['fid']]) ? $files[$info['fid']] : NULL;
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}
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foreach ($new_items as $delta => $info) {
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$new_items[$delta]['file'] = isset($files[$info['fid']]) ? $files[$info['fid']] : NULL;
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}
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}
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/**
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* Diff field callback for parsing image field comparative values.
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*/
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function image_field_diff_view($items, $context) {
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$instance = $context['instance'];
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$settings = $context['settings'];
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$diff_items = array();
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foreach ($items as $delta => $item) {
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if (isset($item['file'])) {
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$output = array();
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// We populate as much as possible to allow the best flexability in any
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// string overrides.
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$t_args = array();
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foreach ($item as $key => $value) {
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if (is_scalar($value)) {
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$t_args['!' . $key] = $value;
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}
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}
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// Some states do not have the file properties in the item, so put these
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// out of the main file object.
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if (!empty($item['file'])) {
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$file_values = (array) $item['file'];
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foreach ($file_values as $key => $value) {
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if (is_scalar($value) && !isset($t_args['!' . $key])) {
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$t_args['!' . $key] = $value;
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}
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}
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}
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$output[] = t('Image: !filename', $t_args);
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if ($settings['compare_alt_field'] && !empty($instance['settings']['alt_field'])) {
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if (!empty($item['alt'])) {
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$output[] = t('Alt: !alt', $t_args);
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}
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}
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if ($settings['compare_title_field'] && !empty($instance['settings']['title_field'])) {
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if (!empty($item['title'])) {
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$output[] = t('Title: !title', $t_args);
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}
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}
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if ($settings['show_id']) {
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$output[] = t('File ID: !fid', $t_args);
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}
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$diff_items[$delta] = implode('; ', $output);
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}
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}
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return $diff_items;
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}
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/**
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* Provide default field comparison options.
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*/
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function image_field_diff_default_options($field_type) {
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return array(
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'show_id' => 0,
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'compare_alt_field' => 0,
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'compare_title_field' => 0,
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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 image_field_diff_options_form($field_type, $settings) {
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$options_form = array();
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$options_form['show_id'] = array(
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'#type' => 'checkbox',
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'#title' => t('Show image ID'),
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'#default_value' => $settings['show_id'],
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);
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$options_form['compare_alt_field'] = array(
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'#type' => 'checkbox',
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'#title' => t('Compare <em>Alt</em> field'),
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'#default_value' => $settings['compare_alt_field'],
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'#description' => t('This is only used if the "Enable <em>Alt</em> field" is checked in the instance settings.'),
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);
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$options_form['compare_title_field'] = array(
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'#type' => 'checkbox',
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'#title' => t('Compare <em>Title</em> field'),
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'#default_value' => $settings['compare_title_field'],
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'#description' => t('This is only used if the "Enable <em>Title</em> field" is checked in the instance settings.'),
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);
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return $options_form;
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}
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