function _media_gallery_reorder in Media Gallery 7

Same name and namespace in other branches

1. 7.2 media_gallery.pages.inc \_media_gallery_reorder()

Helper function to reorder a list when given a reordered subset of the list.

Parameters

array $list: The list in its original order, as a numeric array.

array $ordered_subset: The part of the list that is to be reordered, as a numeric array.

Return value

array The list in its new order.

1 call to _media_gallery_reorder()

media_gallery_reorder_collection in ./media_gallery.pages.inc

Reorder a gallery collection.

File

./media_gallery.pages.inc, line 264

Common pages for the Media Gallery module.

Code

function _media_gallery_reorder($list, $ordered_subset) {
  $list_by_id = array_flip($list);

  // Determine the current position of each item in the subset that we're
  // reordering.
  $subset = array();
  foreach ($ordered_subset as $position => $id) {
    $subset[$list_by_id[$id]] = $id;
  }
  ksort($subset);

  // Place each item of the reordered subset into the list in its new position.
  foreach ($subset as $original_position => $id) {
    $list[$original_position] = current($ordered_subset);
    next($ordered_subset);
  }
  return $list;
}