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- Bug 6907
  In course context menu collection use can impact display of Main Menu.

    1: # The LearningOnline Network with CAPA
    2: # displays the main menu
    3: #
    4: # $Id: lonmainmenu.pm,v 1.13 2021/06/07 06:05:49 raeburn Exp $
    5: #
    6: # Copyright Michigan State University Board of Trustees
    7: #
    8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
    9: #
   10: # LON-CAPA is free software; you can redistribute it and/or modify
   11: # it under the terms of the GNU General Public License as published by
   12: # the Free Software Foundation; either version 2 of the License, or
   13: # (at your option) any later version.
   14: #
   15: # LON-CAPA is distributed in the hope that it will be useful,
   16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
   17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   18: # GNU General Public License for more details.
   19: #
   20: # You should have received a copy of the GNU General Public License
   21: # along with LON-CAPA; if not, write to the Free Software
   22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
   23: #
   24: # /home/httpd/html/adm/gpl.txt
   25: #
   26: # http://www.lon-capa.org/
   27: #
   28: #
   29: # There are two parameters controlling the action of this module:
   30: #
   31: # browser.interface - if this is 'textual', it overrides the second parameter
   32: # and goes to screen reader PDA mode
   33: #
   34: 
   35: package Apache::lonmainmenu;
   36: 
   37: use strict;
   38: use Apache::Constants qw(:common REDIRECT);
   39: use Apache::loncommon();
   40: use Apache::lonnet;
   41: use Apache::lonmenu();
   42: use Apache::lonlocal;
   43: 
   44: sub handler {
   45:     my $r = shift;
   46: 
   47:     # Check for critical messages and redirect if present.  
   48:     my ($redirect,$url) = &Apache::loncommon::critical_redirect(300,'menu');
   49:     if ($redirect) {
   50:         &Apache::loncommon::content_type($r,'text/html');
   51:         $r->header_out(Location => $url);
   52:         return REDIRECT;
   53:     }
   54: 
   55:     &Apache::loncommon::no_cache($r);
   56:     &Apache::loncommon::content_type($r,'text/html');
   57:     $r->send_http_header;
   58:     return OK if $r->header_only;
   59: 
   60: # ---- Print the screen, pretend to be in text mode to generate text-based menu
   61: # temporarily set interface to "faketextual" and remote to "off", which renders
   62: # the main menu
   63:     $env{'browser.interface'}='faketextual';
   64: 
   65:     $r->print(&Apache::loncommon::start_page( 'Main Menu',
   66:                                                undef,
   67:                                               {'bread_crumbs' => 1}));
   68: #
   69: # If menu collection is in effect in course context, and Main Menu is 
   70: # not included, display message in place of usual menu items.
   71: #
   72:     if ($env{'request.course.id'}) {
   73:         my ($menucoll,$deeplinkmenu,$menuref) =
   74:             &Apache::loncommon::menucoll_in_effect();
   75:         if ($menucoll) {
   76:             if (ref($menuref) eq 'HASH') {
   77:                 if ($menuref->{'main'} eq 'n') {
   78:                     $r->print('<h3>'.&mt('Main Menu unavailable').'</h3>');
   79:                     unless ($deeplinkmenu) {
   80:                         my $crstype = &Apache::loncommon::course_type();
   81:                         $r->print('<p>'.&mt("Main Menu page is unavailable in this $crstype").'</p>');
   82:                     }
   83:                     $r->print(&Apache::loncommon::end_page());
   84:                     return OK;
   85:                 }
   86:             }
   87:         }
   88:     }
   89:     $r->print(&Apache::lonmenu::inlinemenu());
   90:     $r->print(&Apache::loncommon::end_page());
   91:     return OK;
   92: }
   93: 
   94: 
   95: 1;
   96: __END__
   97: 
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