function paragraphs_collapse_submit in Paragraphs 7
Submit callback to collapse an item from the field UI multiple wrapper.
When a collapse button is submitted, we need to find the item that it referenced and delete it. Since field UI has the deltas as a straight unbroken array key, we have to renumber everything down. Since we do this we *also* need to move all the deltas around in the $form_state['values'] and $form_state['input'] so that user changed values follow. This is a bit of a complicated process.
Parameters
array $form: The form structure array.
array $form_state: An associative array containing the current state of the form.
1 string reference to 'paragraphs_collapse_submit'
- paragraphs_field_widget_form_build in ./
paragraphs.field_widget.inc - Widget form implementation for paragraphs.
File
- ./
paragraphs.field_widget.inc, line 1075 - Holds functions for the paragraphs widgets.
Code
function paragraphs_collapse_submit(array $form, array &$form_state) {
$button = $form_state['triggering_element'];
$delta = $button['#delta'];
// Where in the form we'll find the parent element.
$address = array_slice($button['#array_parents'], 0, -3);
// Go one level up in the form, to the widgets container.
$parent_element = drupal_array_get_nested_value($form, $address);
$field_name = $parent_element['#field_name'];
$langcode = $parent_element['#language'];
$parents = $parent_element['#field_parents'];
$field_state = field_form_get_state($parents, $field_name, $langcode, $form_state);
if (isset($field_state['entity'][$delta])) {
$field_state['entity'][$delta]->being_edited = 0;
$field_state['entity'][$delta]->must_be_saved = 1;
}
// Fix the weights. Field UI lets the weights be in a range of
// (-1 * item_count) to (item_count). This means that when we remove one,
// the range shrinks; weights outside of that range then get set to
// the first item in the select by the browser, floating them to the top.
// We use a brute force method because we lost weights on both ends
// and if the user has moved things around, we have to cascade because
// if I have items weight weights 3 and 4, and I change 4 to 3 but leave
// the 3, the order of the two 3s now is undefined and may not match what
// the user had selected.
$input = drupal_array_get_nested_value($form_state['input'], $address);
// Sort by weight,
// but first remove garbage values to ensure proper '_weight' sorting.
unset($input['add_more']);
uasort($input, '_field_sort_items_helper');
// Reweight everything in the correct order.
$weight = -1 * $field_state['items_count'] + 1;
foreach ($input as $key => $item) {
if ($item) {
$input[$key]['_weight'] = $weight++;
}
}
drupal_array_set_nested_value($form_state['input'], $address, $input);
field_form_set_state($parents, $field_name, $langcode, $form_state, $field_state);
$form_state['rebuild'] = TRUE;
}