--- /dev/null
+<?php
+
+/**
+ * @file
+ * Field module functionality for the File module.
+ */
+
+use Drupal\Core\Field\FieldDefinitionInterface;
+use Drupal\Core\Field\FieldFilteredMarkup;
+use Drupal\Core\Render\Element;
+
+/**
+ * Prepares variables for multi file form widget templates.
+ *
+ * Default template: file-widget-multiple.html.twig.
+ *
+ * @param array $variables
+ * An associative array containing:
+ * - element: A render element representing the widgets.
+ */
+function template_preprocess_file_widget_multiple(&$variables) {
+ $element = $variables['element'];
+
+ // Special ID and classes for draggable tables.
+ $weight_class = $element['#id'] . '-weight';
+ $table_id = $element['#id'] . '-table';
+
+ // Build up a table of applicable fields.
+ $headers = [];
+ $headers[] = t('File information');
+ if ($element['#display_field']) {
+ $headers[] = [
+ 'data' => t('Display'),
+ 'class' => ['checkbox'],
+ ];
+ }
+ $headers[] = t('Weight');
+ $headers[] = t('Operations');
+
+ // Get our list of widgets in order (needed when the form comes back after
+ // preview or failed validation).
+ $widgets = [];
+ foreach (Element::children($element) as $key) {
+ $widgets[] = &$element[$key];
+ }
+ usort($widgets, '_field_multiple_value_form_sort_helper');
+
+ $rows = [];
+ foreach ($widgets as $key => &$widget) {
+ // Save the uploading row for last.
+ if (empty($widget['#files'])) {
+ $widget['#title'] = $element['#file_upload_title'];
+ $widget['#description'] = \Drupal::service('renderer')->renderPlain($element['#file_upload_description']);
+ continue;
+ }
+
+ // Delay rendering of the buttons, so that they can be rendered later in the
+ // "operations" column.
+ $operations_elements = [];
+ foreach (Element::children($widget) as $sub_key) {
+ if (isset($widget[$sub_key]['#type']) && $widget[$sub_key]['#type'] == 'submit') {
+ hide($widget[$sub_key]);
+ $operations_elements[] = &$widget[$sub_key];
+ }
+ }
+
+ // Delay rendering of the "Display" option and the weight selector, so that
+ // each can be rendered later in its own column.
+ if ($element['#display_field']) {
+ hide($widget['display']);
+ }
+ hide($widget['_weight']);
+
+ // Render everything else together in a column, without the normal wrappers.
+ $widget['#theme_wrappers'] = [];
+ $information = drupal_render($widget);
+ $display = '';
+ if ($element['#display_field']) {
+ unset($widget['display']['#title']);
+ $display = [
+ 'data' => render($widget['display']),
+ 'class' => ['checkbox'],
+ ];
+ }
+ $widget['_weight']['#attributes']['class'] = [$weight_class];
+ $weight = render($widget['_weight']);
+
+ // Arrange the row with all of the rendered columns.
+ $row = [];
+ $row[] = $information;
+ if ($element['#display_field']) {
+ $row[] = $display;
+ }
+ $row[] = $weight;
+
+ // Show the buttons that had previously been marked as hidden in this
+ // preprocess function. We use show() to undo the earlier hide().
+ foreach (Element::children($operations_elements) as $key) {
+ show($operations_elements[$key]);
+ }
+ $row[] = [
+ 'data' => $operations_elements,
+ ];
+ $rows[] = [
+ 'data' => $row,
+ 'class' => isset($widget['#attributes']['class']) ? array_merge($widget['#attributes']['class'], ['draggable']) : ['draggable'],
+ ];
+ }
+
+ $variables['table'] = [
+ '#type' => 'table',
+ '#header' => $headers,
+ '#rows' => $rows,
+ '#attributes' => [
+ 'id' => $table_id,
+ ],
+ '#tabledrag' => [
+ [
+ 'action' => 'order',
+ 'relationship' => 'sibling',
+ 'group' => $weight_class,
+ ],
+ ],
+ '#access' => !empty($rows),
+ ];
+
+ $variables['element'] = $element;
+}
+
+/**
+ * Prepares variables for file upload help text templates.
+ *
+ * Default template: file-upload-help.html.twig.
+ *
+ * @param array $variables
+ * An associative array containing:
+ * - description: The normal description for this field, specified by the
+ * user.
+ * - upload_validators: An array of upload validators as used in
+ * $element['#upload_validators'].
+ */
+function template_preprocess_file_upload_help(&$variables) {
+ $description = $variables['description'];
+ $upload_validators = $variables['upload_validators'];
+ $cardinality = $variables['cardinality'];
+
+ $descriptions = [];
+
+ if (!empty($description)) {
+ $descriptions[] = FieldFilteredMarkup::create($description);
+ }
+ if (isset($cardinality)) {
+ if ($cardinality == -1) {
+ $descriptions[] = t('Unlimited number of files can be uploaded to this field.');
+ }
+ else {
+ $descriptions[] = \Drupal::translation()->formatPlural($cardinality, 'One file only.', 'Maximum @count files.');
+ }
+ }
+ if (isset($upload_validators['file_validate_size'])) {
+ $descriptions[] = t('@size limit.', ['@size' => format_size($upload_validators['file_validate_size'][0])]);
+ }
+ if (isset($upload_validators['file_validate_extensions'])) {
+ $descriptions[] = t('Allowed types: @extensions.', ['@extensions' => $upload_validators['file_validate_extensions'][0]]);
+ }
+
+ if (isset($upload_validators['file_validate_image_resolution'])) {
+ $max = $upload_validators['file_validate_image_resolution'][0];
+ $min = $upload_validators['file_validate_image_resolution'][1];
+ if ($min && $max && $min == $max) {
+ $descriptions[] = t('Images must be exactly <strong>@size</strong> pixels.', ['@size' => $max]);
+ }
+ elseif ($min && $max) {
+ $descriptions[] = t('Images must be larger than <strong>@min</strong> pixels. Images larger than <strong>@max</strong> pixels will be resized.', ['@min' => $min, '@max' => $max]);
+ }
+ elseif ($min) {
+ $descriptions[] = t('Images must be larger than <strong>@min</strong> pixels.', ['@min' => $min]);
+ }
+ elseif ($max) {
+ $descriptions[] = t('Images larger than <strong>@max</strong> pixels will be resized.', ['@max' => $max]);
+ }
+ }
+
+ $variables['descriptions'] = $descriptions;
+}
+
+/**
+ * Determine whether a field references files stored in {file_managed}.
+ *
+ * @param \Drupal\Core\Field\FieldDefinitionInterface $field
+ * A field definition.
+ *
+ * @return bool
+ * The field column if the field references {file_managed}.fid, typically
+ * fid, FALSE if it does not.
+ */
+function file_field_find_file_reference_column(FieldDefinitionInterface $field) {
+ $schema = $field->getFieldStorageDefinition()->getSchema();
+ foreach ($schema['foreign keys'] as $data) {
+ if ($data['table'] == 'file_managed') {
+ foreach ($data['columns'] as $field_column => $column) {
+ if ($column == 'fid') {
+ return $field_column;
+ }
+ }
+ }
+ }
+ return FALSE;
+}