It is possible to display the current book???

This feature has come up in several issue threads. I reply here only and leave it for the maintainers to deal with house keeping.

It is possible to have a jQuery menu for the current book by preprocessing the block output by the books module. I have done this in my dev environment in the template.php file. Anyone with basic theming knowledge and experience should be able to follow my code hint:

<?php

function template_preprocess_block(&$variables) {

    $block = &$variables['block'];

    if ($block->module == 'book') {
        $node = menu_get_object();
        $toplevel[] = $node->book['bid'];
        if (!empty($toplevel)) {
            $tree = recursive_book_array_builder($toplevel);
            $trail = book_trail_builder();
            if (empty($trail)) $trail = array();
            $block->content = theme('menu_creation_by_array', $tree, $trail);
        }
    }

}

?>

IMHO this solution should be added to the documentation for Advanced Book Blocks.

Hi nw,

Thanks for posting this solution, it was very helpful !
I had to make a slight change though to make it working: I had to replace
if ($block->module == 'book')
with
if ($block->module == 'advancedbookblocks')

Works for me too, with the addition from tlaurent.

Additional workflow: you need to put all your books in one ABB, not an ABB for every book.

#517314: How to keep block displayed just during its book browsing? marked as a duplicate of this.

This didn't work for me so I made a little hacking. If it works for other please tell me so I can make a patch.
One note is that I use it only to display the tree and not navigate through it. So this worked like a charm.

function books_get_top_level($d = NULL, $context = NULL) {
  $books = array();
  $result = '';
  if ($d == NULL && $context == NULL) {
    $query = db_select('book', 'b');
    $query->join('menu_links', 'm',  'm.mlid = b.mlid');
    $result = $query
      ->fields('b', array('bid'))
      ->fields('m', array('weight'))
      ->orderBy('m.weight', 'ASC')
      ->addTag('node_access')
      ->execute();
  }
  if ($d != NULL && $context == NULL) {
    $result = db_query("SELECT bid, weight FROM {adv_book_custom} WHERE delta = :delta ORDER BY weight ASC", array(':delta' => $d));
  }
  if ($d != NULL && $context == 'display') {
    if ($node = menu_get_object()) {
      $nid = $node->nid;
    }
    // We hack here because we only want the current book.
    // $result = db_query("SELECT bid, weight FROM {adv_book_custom} WHERE delta = :delta AND enabled = 1 ORDER BY weight ASC", array(':delta' => $d));
  }
  // foreach ($result as $book) {
    if (!in_array($nid, $books)) {
      $books[] = $nid;
    // }
  }
  return $books;
}