function _book_node_is_removable

Determines if a node can be removed from the book.

A node can be removed from a book if it is actually in a book and it either is not a top-level page or is a top-level page with no children.

File

drupal/core/modules/book/book.module, line 231

Allows users to create and organize related content in an outline.

Code

function _book_node_is_removable($node) {
  return !empty($node->book['bid']) && ($node->book['bid'] != $node->nid || !$node->book['has_children']);
}