Club Drupal

<?php

/**

 * @file

 * Contains the functions to generate Printer-friendly pages.

 *

 * This file is included by the core PF module, and includes all the

 * functions necessary to generate a PF version of the original page

 * in HTML format.

 *

 * @ingroup print

 */

$_print_urls = PRINT_URLS_DEFAULT;

/**

 * Generate an HTML version of the printer-friendly page

 *

 * @see print_controller()

 */

function print_controller_html() {

  $args = func_get_args();

  $path = filter_xss(implode('/', $args));

  $cid = isset($_GET['comment']) ? (int)$_GET['comment'] : NULL;

  // Handle the query

  $query = $_GET;

  unset($query['q']);

  $print = print_controller($path, $query, $cid, PRINT_HTML_FORMAT);

  if ($print !== FALSE) {

    $node = $print['node'];

    $html = theme('print', array('print' => $print, 'type' => PRINT_HTML_FORMAT, 'node' => $node));

    drupal_add_http_header('Content-Type', 'text/html; charset=utf-8');

    drupal_send_headers();

    print $html;

    $nodepath = (isset($node->path) && is_string($node->path)) ? drupal_get_normal_path($node->path) : 'node/' . $path;

    db_merge('print_page_counter')

      ->key(array('path' => $nodepath))

      ->fields(array(

          'totalcount' => 1,

          'timestamp' => REQUEST_TIME,

      ))

      ->expression('totalcount', 'totalcount + 1')

      ->execute();

  }

}

/**

 * Select the print generator function based on the page type

 *

 * Depending on the type of node, this functions chooses the appropriate

 * generator function.

 *

 * @param $path

 *   path of the original page

 * @param array $query

 *   (optional) array of key/value pairs as used in the url() function for the

 *   query

 * @param $cid

 *   comment ID of the individual comment to be rendered

 * @param $format

 *   format of the page being generated

 * @param $teaser

 *   if set to TRUE, outputs only the node's teaser

 * @param $message

 *   optional sender's message (used by the send email module)

 * @return

 *   array with the fields to be used in the template

 * @see _print_generate_node()

 * @see _print_generate_path()

 * @see _print_generate_book()

 */

function print_controller($path, $query = NULL, $cid = NULL, $format = PRINT_HTML_FORMAT, $teaser = FALSE, $message = NULL) {

  if (empty($path)) {

    // If no path was provided, let's try to generate a page for the referer

    global $base_url;

    $ref = $_SERVER['HTTP_REFERER'];

    $path = preg_replace("!^$base_url/!", '', $ref);

    if (($path === $ref) || empty($path)) {

      $path = variable_get('site_frontpage', 'node');

    }

  }

  if ($alias = drupal_lookup_path('source', $path)) {

    // Indirect call with print/alias

    // If there is a path alias with these arguments, generate a printer-friendly version for it

    $path = $alias;

  }

  $parts = explode('/', $path);

  if (($parts[0] == 'node') && (count($parts) > 1) && ctype_digit($parts[1])) {

    array_shift($parts);

    $path = implode('/', $parts);

  }

  if (ctype_digit($parts[0]) && (count($parts) == 1)) {

    $print = _print_generate_node($path, $query, $cid, $format, $teaser, $message);

  }

  else {

    $ret = preg_match('!^book/export/html/(.*)!i', $path, $matches);

    if ($ret == 1) {

      // This is a book PF page link, handle trough the book handling functions

      $print = _print_generate_book($matches[1], $query, $format, $teaser, $message);

    }

    else {

      // If no content node was found, handle the page printing with the 'printable' engine

      $print = _print_generate_path($path, $query, $format, $teaser, $message);

    }

  }

  return $print;

}

/**

 * Generates a robots meta tag to tell them what they may index

 *

 * @return

 *   string with the meta robots tag

 */

function _print_robots_meta_generator() {

  $print_robots_noindex = variable_get('print_robots_noindex', PRINT_ROBOTS_NOINDEX_DEFAULT);

  $print_robots_nofollow = variable_get('print_robots_nofollow', PRINT_ROBOTS_NOFOLLOW_DEFAULT);

  $print_robots_noarchive = variable_get('print_robots_noarchive', PRINT_ROBOTS_NOARCHIVE_DEFAULT);

  $robots_meta = array();

  if (!empty($print_robots_noindex)) {

    $robots_meta[] = 'noindex';

  }

  if (!empty($print_robots_nofollow)) {

    $robots_meta[] = 'nofollow';

  }

  if (!empty($print_robots_noarchive)) {

    $robots_meta[] = 'noarchive';

  }

  if (count($robots_meta) > 0) {

    $robots_meta = implode(', ', $robots_meta);

    $robots_meta = "<meta name='robots' content='$robots_meta' />\n";

  }

  else {

    $robots_meta = '';

  }

  return $robots_meta;

}

/**

 * Post-processor that fills the array for the template with common details

 *

 * @param $node

 *   generated node with a printer-friendly node body

 * @param array $query

 *   (optional) array of key/value pairs as used in the url() function for the

 *   query

 * @param $message

 *   optional sender's message (used by the send email module)

 * @param $cid

 *   id of current comment being generated (NULL when not generating

 *   an individual comment)

 * @return

 *   array with the fields to be used in the template

 */

function _print_var_generator($node, $query = NULL, $message = NULL, $cid = NULL) {

  global $base_url, $language, $_print_urls;

  $path = empty($node->nid) ? $node->path : "node/$node->nid";

  // print module settings

  $print_css = variable_get('print_css', PRINT_CSS_DEFAULT);

  $print_keep_theme_css = variable_get('print_keep_theme_css', PRINT_KEEP_THEME_CSS_DEFAULT);

  $print_logo_options = variable_get('print_logo_options', PRINT_LOGO_OPTIONS_DEFAULT);

  $print_logo_url = variable_get('print_logo_url', PRINT_LOGO_URL_DEFAULT);

  $print_html_new_window = variable_get('print_html_new_window', PRINT_HTML_NEW_WINDOW_DEFAULT);

  $print_html_sendtoprinter = variable_get('print_html_sendtoprinter', PRINT_HTML_SENDTOPRINTER_DEFAULT);

  $print_html_windowclose = variable_get('print_html_windowclose', PRINT_HTML_WINDOWCLOSE_DEFAULT);

  $print_sourceurl_enabled = variable_get('print_sourceurl_enabled', PRINT_SOURCEURL_ENABLED_DEFAULT);

  $print_sourceurl_forcenode = variable_get('print_sourceurl_forcenode', PRINT_SOURCEURL_FORCENODE_DEFAULT);

  $print_sourceurl_date = variable_get('print_sourceurl_date', PRINT_SOURCEURL_DATE_DEFAULT);

  $print_footer_options = variable_get('print_footer_options', PRINT_FOOTER_OPTIONS_DEFAULT);

  $print_footer_user = variable_get('print_footer_user', PRINT_FOOTER_USER_DEFAULT);

  $print['language'] = $language->language;

  $print['title'] = check_plain($node->title);

  $print['head'] = drupal_get_html_head();

  if ($print_html_sendtoprinter) {

    drupal_add_js('misc/drupal.js', array('weight' => JS_LIBRARY));

  }

  $print['scripts'] = drupal_get_js();

  $print['footer_scripts'] = drupal_get_js('footer');

  $print['robots_meta'] = _print_robots_meta_generator();

  $print['url'] = url($path, array('absolute' => TRUE, 'query' => $query));

  $print['base_href'] = "<base href='" . $print['url'] . "' />\n";

  $print['favicon'] = theme_get_setting('toggle_favicon') ? "<link rel='shortcut icon' href='" . theme_get_setting('favicon') . "' type='image/x-icon' />\n" : '';

  if (!empty($print_css)) {

    drupal_add_css(strtr($print_css, array('%t' => path_to_theme())));

  }

  else {

    drupal_add_css(drupal_get_path('module', 'print') . '/css/print.css');

  }

  $drupal_css = drupal_add_css();

  if (!$print_keep_theme_css) {

    foreach ($drupal_css as $key => $css_file) {

      if ($css_file['group'] == CSS_THEME) {

      // Unset the theme's CSS

        unset($drupal_css[$key]);

      }

    }

  }

  // If we are sending a message via email, the CSS must be embedded

  if (!empty($message)) {

    $style = '';

    $css_files = array_keys($drupal_css);

    foreach ($css_files as $filename) {

      $res = file_exists($filename) ? file_get_contents($filename, TRUE) : FALSE;

      if ($res != FALSE) {

        $style .= $res;

      }

    }

    $print['css'] = "<style type='text/css' media='all'>$style</style>\n";

  }

  else {

    $print['css'] = drupal_get_css($drupal_css);

  }

  $window_close = ($print_html_new_window && $print_html_windowclose) ? 'window.close();' : '';

  $print['sendtoprinter'] = $print_html_sendtoprinter ? '<script type="text/javascript">(function ($) { Drupal.behaviors.print = {attach: function(context) {$(window).load(function() {window.print();' . $window_close . '})}}})(jQuery);</script>' : '';

  switch ($print_logo_options) {

    case 0: // none

      $logo_url = 0;

      break;

    case 1: // theme's

      $logo_url = theme_get_setting('logo');

      break;

    case 2: // user-specifed

      $logo_url = strip_tags($print_logo_url);

      break;

  }

  $logo_url = preg_replace('!^' . base_path() . '!', '', $logo_url);

  $site_name = variable_get('site_name', 'Drupal');

  $print['logo'] = $logo_url ? theme('image', array('path' => $logo_url, 'alt' => $site_name, 'attributes' => array('class' => 'print-logo', 'id' => 'logo'))) : '';

  switch ($print_footer_options) {

    case 0: // none

      $footer = '';

      break;

    case 1: // theme's

      $footer_blocks = block_get_blocks_by_region('footer');

      $footer = variable_get('site_footer', FALSE) . "\n" . drupal_render($footer_blocks);

      break;

    case 2: // user-specifed

      $footer = $print_footer_user;

      break;

  }

  $print['footer_message'] = filter_xss_admin($footer);

  $published_site = variable_get('site_name', 0);

  if ($published_site) {

    $print_text_published = filter_xss(variable_get('print_text_published', t('Published on %site_name')));

    $published = t($print_text_published, array('%site_name' => $published_site));

    $print['site_name'] = $published . ' (' . l($base_url, $base_url) . ')';

  }

  else {

    $print['site_name'] = '';

  }

  if ($print_sourceurl_enabled == 1) {

    /* Grab and format the src URL */

    if (empty($print_sourceurl_forcenode)) {

      $url = $print['url'];

    }

    else {

      $url = $base_url . '/' . (((bool)variable_get('clean_url', '0')) ? '' : '?q=') . $path;

    }

    if (is_int($cid)) {

      $url .= "#comment-$cid";

    }

    $retrieved_date = format_date(REQUEST_TIME, 'short');

    $print_text_retrieved = filter_xss(variable_get('print_text_retrieved', t('retrieved on %date')));

    $retrieved = t($print_text_retrieved, array('%date' => $retrieved_date));

    $print['printdate'] = $print_sourceurl_date ? " ($retrieved)" : '';

    $source_url = filter_xss(variable_get('print_text_source_url', t('Source URL')));

    $print['source_url'] = '<strong>' . $source_url . $print['printdate'] . ':</strong> ' . l($url, $url);

  }

  else {

    $print['source_url'] = '';

  }

  $print['type'] = (isset($node->type)) ? $node->type : '';

  menu_set_active_item($path);

  $breadcrumb = drupal_get_breadcrumb();

  if (!empty($breadcrumb)) {

    $breadcrumb[] = menu_get_active_title();

    $print['breadcrumb'] = filter_xss(implode(' > ', $breadcrumb));

  }

  else {

    $print['breadcrumb'] = '';

  }

  // Display the collected links at the bottom of the page. Code once taken from Kjartan Mannes' project.module

  $print['pfp_links'] = '';

  if (!empty($_print_urls)) {

    $urls = _print_friendly_urls();

    $max = count($urls);

    $pfp_links = '';

    if ($max) {

      for ($i = 0; $i < $max; $i++) {

        $pfp_links .= '[' . ($i + 1) . '] ' . check_plain($urls[$i]) . "<br />\n";

      }

      $links = filter_xss(variable_get('print_text_links', t('Links')));

      $print['pfp_links'] = "<p><strong>$links:</strong><br />$pfp_links</p>";

    }

  }

  $print['node'] = $node;

  $print['message'] = $message;

  return $print;

}

/**

 * Callback function for the preg_replace_callback for URL-capable patterns

 *

 * Manipulate URLs to make them absolute in the URLs list, and to add a

 * [n] footnote marker.

 *

 * @param $matches

 *   array with the matched tag patterns, usually <a...>+text+</a>

 * @return

 *   tag with re-written URL and when appropriate the [n] index to the

 *   URL list

 */

function _print_rewrite_urls($matches) {

  global $base_url, $base_root, $_print_urls;

  $include_anchors = variable_get('print_urls_anchors', PRINT_URLS_ANCHORS_DEFAULT);

  // first, split the html into the different tag attributes

  $pattern = '!\s*(\w+\s*=\s*"(?:\\\"|[^"])*")\s*|\s*(\w+\s*=\s*\'(?:\\\\\'|[^\'])*\')\s*|\s*(\w+\s*=\s*\w+)\s*|\s+!';

  $attribs = preg_split($pattern, $matches[1], -1, PREG_SPLIT_NO_EMPTY | PREG_SPLIT_DELIM_CAPTURE);

  foreach ($attribs as $key => $value) {

    $attribs[$key] = preg_replace('!(\w)\s*=\s*(.*)!', '$1=$2', $value);

  }

  $size = count($attribs);

  for ($i=1; $i < $size; $i++) {

    // If the attribute is href or src, we may need to rewrite the URL in the value

    if (preg_match('!^(?:href|src)\s*?=(.*)!i', $attribs[$i], $urls) > 0) {

      $url = trim($urls[1], " \t\n\r\0\x0B\"'");

      if (empty($url)) {

        // If URL is empty, use current_url

        $path = explode('/', $_GET['q']);

        unset($path[0]);

        $path = implode('/', $path);

        if (ctype_digit($path)) {

          $path = "node/$path";

        }

        // Printer-friendly URLs is on, so we need to make it absolute

        $newurl = url($path, array('fragment' => drupal_substr($url, 1), 'absolute' => TRUE));

      }

      elseif (strpos(html_entity_decode($url), '://') || preg_match('!^mailto:.*?@.*?\..*?$!iu', html_entity_decode($url))) {

        // URL is absolute, do nothing

        $newurl = $url;

      }

      elseif (strpos(html_entity_decode($url), '//') === 0) {

        // URL is 'almost absolute', but it does not contain protocol; replace with base_path protocol

        $newurl = (empty($_SERVER['HTTPS']) ? 'http' : 'https') . ":" . $url;

        $matches[1] = str_replace($url, $newurl, $matches[1]);

      }

      else {

        if ($url[0] == '#') {

          // URL is an anchor tag

          if ($include_anchors && (!empty($_print_urls))) {

            $path = explode('/', $_GET['q']);

            unset($path[0]);

            $path = implode('/', $path);

            if (ctype_digit($path)) {

              $path = "node/$path";

            }

            // Printer-friendly URLs is on, so we need to make it absolute

            $newurl = url($path, array('fragment' => drupal_substr($url, 1), 'absolute' => TRUE));

          }

          // Because base href is the original page, change the link to

          // still be usable inside the print page

          $matches[1] = str_replace($url, base_path() . $_GET['q'] . $url, $matches[1]);

        }

        else {

          // URL is relative, convert it into absolute URL

          if ($url[0] == '/') {

            // If it starts with '/' just append it to the server name

            $newurl = $base_root . '/' . trim($url, '/');

          }

          elseif (preg_match('!^(?:index.php)?\?q=!i', $url)) {

            // If it starts with ?q=, just prepend with the base URL

            $newurl = $base_url . '/' . trim($url, '/');

          }

          else {

            $newurl = url(trim($url, '/'), array('absolute' => TRUE));

          }

          $matches[1] = str_replace($url, $newurl, $matches[1]);

        }

      }

    }

  }

  $ret = '<' . $matches[1] . '>';

  if (count($matches) == 4) {

    $ret .= $matches[2] . $matches[3];

    if ((!empty($_print_urls)) && (isset($newurl))) {

      $ret .= ' <span class="print-footnote">[' . _print_friendly_urls(trim($newurl)) . ']</span>';

    }

  }

  return $ret;

}

/**

 * Auxiliary function to store the Printer-friendly URLs list as static.

 *

 * @param $url

 *   absolute URL to be inserted in the list

 * @return

 *   list of URLs previously stored if $url is 0, or the current count

 *   otherwise.

 */

function _print_friendly_urls($url = 0) {

  static $urls = array();

  if ($url !== 0) {

    $url_idx = array_search($url, $urls);

    if ($url_idx !== FALSE) {

      return ($url_idx + 1);

    }

    else {

      $urls[] = $url;

      return count($urls);

    }

  }

  $ret = $urls;

  $urls = array();

  return $ret;

}

/**

 * Check URL list settings for this node

 *

 * @param node

 *   node object

 * @param $format

 *   format of the page being generated

 * @return

 *   TRUE if URL list should be displayed, FALSE otherwise

 */

function _print_url_list_enabled($node, $format = PRINT_HTML_FORMAT) {

  if (!isset($node->type)) {

    switch ($format) {

      case PRINT_HTML_FORMAT:

        $node_urllist = variable_get('print_display_sys_urllist', PRINT_TYPE_SYS_URLLIST_DEFAULT);

        break;

      case PRINT_MAIL_FORMAT:

        $node_urllist = variable_get('print_mail_display_sys_urllist', PRINT_TYPE_SYS_URLLIST_DEFAULT);

        break;

      case PRINT_PDF_FORMAT:

        $node_urllist = variable_get('print_pdf_display_sys_urllist', PRINT_TYPE_SYS_URLLIST_DEFAULT);

        break;

      default:

        $node_urllist = PRINT_TYPE_SYS_URLLIST_DEFAULT;

    }

  }

  else {

    switch ($format) {

      case PRINT_HTML_FORMAT:

        $node_urllist = isset($node->print_display_urllist) ? $node->print_display_urllist : variable_get('print_display_urllist_' . $node->type, PRINT_TYPE_URLLIST_DEFAULT);

        break;

      case PRINT_MAIL_FORMAT:

        $node_urllist = isset($node->print_mail_display_urllist) ? $node->print_mail_display_urllist : variable_get('print_mail_display_urllist_' . $node->type, PRINT_TYPE_URLLIST_DEFAULT);

        break;

      case PRINT_PDF_FORMAT:

        $node_urllist = isset($node->print_pdf_display_urllist) ? $node->print_pdf_display_urllist : variable_get('print_pdf_display_urllist_' . $node->type, PRINT_TYPE_URLLIST_DEFAULT);

        break;

      default:

        $node_urllist = PRINT_TYPE_URLLIST_DEFAULT;

    }

  }

  // Get value of Printer-friendly URLs setting

  return (variable_get('print_urls', PRINT_URLS_DEFAULT) && ($node_urllist));

}

/**

 * Prepare a Printer-friendly-ready node body for content nodes

 *

 * @param $nid

 *   node ID of the node to be rendered into a printer-friendly page

 * @param array $query

 *   (optional) array of key/value pairs as used in the url() function for the

 *   query

 * @param $cid

 *   comment ID of the individual comment to be rendered

 * @param $format

 *   format of the page being generated

 * @param $teaser

 *   if set to TRUE, outputs only the node's teaser

 * @param $message

 *   optional sender's message (used by the send email module)

 * @return

 *   filled array ready to be used in the template

 */

function _print_generate_node($nid, $query = NULL, $cid = NULL, $format = PRINT_HTML_FORMAT, $teaser = FALSE, $message = NULL) {

  global $_print_urls;

  if (!isset($langcode)) {

    $langcode = $GLOBALS['language_content']->language;

  }

  // We can take a node id

  $node = node_load($nid);

  if (!$node) {

    // Node not found

    drupal_not_found();

    return FALSE;

  }

  elseif (!node_access('view', $node)) {

    // Access is denied

    drupal_access_denied();

    return FALSE;

  }

  drupal_set_title($node->title);

  $view_mode = $teaser ? 'teaser' : 'print';

  // Turn off Pagination by the Paging module

  unset($node->pages);

  unset($node->page_count);

  // Make this page a member of the original page's organic group

  if (function_exists('og_set_group_context') && isset($node->og_groups)) {

    og_set_group_context($node->og_groups);

  }

  if ($cid === NULL) {

    // Adapted (simplified) version of node_view

    // Render the node content

    node_build_content($node, $view_mode);

    // Disable the links area

    unset($node->content['links']);

    // Disable fivestar widget output

    unset($node->content['fivestar_widget']);

    // Disable service links module output

    unset($node->content['service_links']);

    $build = $node->content;

    unset($node->content);

  }

  $print_comments = variable_get('print_comments', PRINT_COMMENTS_DEFAULT);

  if (function_exists('comment_node_page_additions') && (($cid != NULL) || ($print_comments))) {

    // Print only the requested comment (or if $cid is NULL, all of them)

    $comments = comment_node_page_additions($node);

    if (!empty($comments)) {

      unset($comments['comment_form']);

      foreach ($comments['comments'] as $key => &$comment) {

        if (is_numeric($key)) {

          if (($cid != NULL) && ($key != $cid)) {

            unset($comments['comments'][$key]);

          }

          else {

            unset($comment['links']);

          }

        }

      }

      $build['comments'] = $comments;

    }

  }

  $build += array(

    '#theme' => 'node',

    '#node' => $node,

    '#view_mode' => $view_mode,

    '#language' => $langcode,

    '#print_format' => $format,

  );

  $type = 'node';

  drupal_alter(array('node_view', 'entity_view'), $build, $type);

  $content = render($build);

  // Get rid of any links before the content

  $parts = explode('<div class="content', $content, 2);

  if (count($parts) == 2) {

    $pattern = '!(.*?)<a [^>]*?>(.*?)</a>(.*?)!mis';

    $parts[0] = preg_replace($pattern, '$1$2$3', $parts[0]);

    $content = implode('<div class="content', $parts);

  }

  // Check URL list settings

  $_print_urls = _print_url_list_enabled($node, $format);

  // Convert the a href elements

  $pattern = '!<(a\s[^>]*?)>(.*?)(</a>)!is';

  $content = preg_replace_callback($pattern, '_print_rewrite_urls', $content);

  $print = _print_var_generator($node, $query, $message, $cid);

  $print['content'] = $content;

  return $print;

}

/**

 * Prepare a Printer-friendly-ready node body for non-content pages

 *

 * @param $path

 *   path of the node to be rendered into a printer-friendly page

 * @param array $query

 *   (optional) array of key/value pairs as used in the url() function for the

 *   query

 * @param $format

 *   format of the page being generated

 * @param $teaser

 *   if set to TRUE, outputs only the node's teaser

 * @param $message

 *   optional sender's message (used by the send email module)

 * @return

 *   filled array ready to be used in the template

 */

function _print_generate_path($path, $query = NULL, $format = PRINT_HTML_FORMAT, $teaser = FALSE, $message = NULL) {

  global $_print_urls;

  // Handle node tabs

  $parts = explode('/', $path);

  if (ctype_digit($parts[0]) && (count($parts) > 1)) {

    $path = 'node/' . $path;

  }

  $path = drupal_get_normal_path($path);

  menu_set_active_item($path);

  // Adapted from index.php.

  $node = new stdClass();

  $node->body = menu_execute_active_handler($path, FALSE);

  if (is_array($node->body)) {

    $node->body = drupal_render($node->body);

  }

  if (is_int($node->body)) {

    switch ($node->body) {

      case MENU_NOT_FOUND:

        drupal_not_found();

        return FALSE;

        break;

      case MENU_ACCESS_DENIED:

        drupal_access_denied();

        return FALSE;

        break;

    }

  }

  $node->title = drupal_get_title();

  $node->path = $path;

  $node->changed = 0;

  // Delete any links area

  $node->body = preg_replace('!\s*<div class="links">.*?</div>!sim', '', $node->body);

  // Check URL list settings

  $_print_urls = _print_url_list_enabled($node, $format);

  // Convert the a href elements

  $pattern = '!<(a\s[^>]*?)>(.*?)(</a>)!is';

  $node->body = preg_replace_callback($pattern, '_print_rewrite_urls', $node->body);

  $print = _print_var_generator($node, $query, $message);

  $print['content'] = $node->body;

  return $print;

}

/**

 * Prepare a Printer-friendly-ready node body for book pages

 *

 * @param $nid

 *   node ID of the node to be rendered into a printer-friendly page

 * @param array $query

 *   (optional) array of key/value pairs as used in the url() function for the

 *   query

 * @param $format

 *   format of the page being generated

 * @param $teaser

 *   if set to TRUE, outputs only the node's teaser

 * @param $message

 *   optional sender's message (used by the send email module)

 * @return

 *   filled array ready to be used in the template

 */

function _print_generate_book($nid, $query = NULL, $format = PRINT_HTML_FORMAT, $teaser = FALSE, $message = NULL) {

  global $_print_urls;

  $node = node_load($nid);

  if (!$node) {

    // Node not found

    drupal_not_found();

    return FALSE;

  }

  elseif (!node_access('view', $node) || (!user_access('access printer-friendly version'))) {

    // Access is denied

    drupal_access_denied();

    return FALSE;

  }

  $tree = book_menu_subtree_data($node->book);

  $node->body = book_export_traverse($tree, 'book_node_export');

  // Check URL list settings

  $_print_urls = _print_url_list_enabled($node, $format);

  // Convert the a href elements

  $pattern = '!<(a\s[^>]*?)>(.*?)(</a>)!is';

  $node->body = preg_replace_callback($pattern, '_print_rewrite_urls', $node->body);

  $print = _print_var_generator($node, $query, $message);

  $print['content'] = $node->body;

  // The title is already displayed by the book_recurse, so avoid duplication

  $print['title'] = '';

  return $print;

}