function _book_node_is_removable in Drupal 7

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.

Parameters

$node: The node to remove from the outline.

3 calls to _book_node_is_removable()

book_outline_form in modules/book/book.pages.inc

Form constructor for the book outline form.

book_remove_form_submit in modules/book/book.pages.inc

Form submission handler for book_remove_form().

_book_outline_remove_access in modules/book/book.module

Access callback: Determines if the user can remove nodes from the outline.

File

modules/book/book.module, line 228

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']);
}