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Changes to improve usability for Course Contents and Content Editor.
- Separate "editor" tabs (Content Editor && Supplemental Content Editor) from
  "display" tabs (Main Content, Supplemental Content, Content Search, Content Index).
- Replace "Edit Content" link on "Course Contents" page (used to jump directly
  to editing specific folder) with icon, to reduce clutter.
- "Back to Overview" link on editor pages to jump directly to corresponding
  location on "display" pages.
- CC and student roles have same tabs in "display" of Contents
- New URL: "/adm/supplemental" for supplemental contents when displaying
  (as CC or student).
- Supplemental Course Content breadcrumbs do not need link to course as first
  item.
- Functions menu in Supplemental Course Content includes "Folder Editor" link
  to jump to editor.
- Do not use style: "LC_current_location" when location is a folder.

    1: # The LearningOnline Network with CAPA
    2: # Index Course
    3: #
    4: # $Id: lonindexcourse.pm,v 1.2 2011/12/25 20:41:53 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: ###############################################################################
   30: 
   31: package Apache::lonindexcourse;
   32: 
   33: use strict;
   34: use Apache::Constants qw(:common :http);
   35: use Apache::lonnet;
   36: use GDBM_File;
   37: use Apache::loncommon();
   38: use Apache::lonmeta;
   39: use Apache::lonhtmlcommon;
   40: use Apache::lonlocal;
   41: use LONCAPA::lonmetadata();
   42: use HTML::Entities();
   43: use Apache::lonnavmaps;
   44: use Apache::lonnavdisplay();
   45: use Apache::lonindexer();
   46: use LONCAPA;
   47: 
   48: # Variables For course search
   49: my %alreadyseen;
   50: my %hash;
   51: my %indexhash=();
   52: my %indextitles=();
   53: 
   54: sub make_symb {
   55:     my ($id)=@_;
   56:     my ($mapid,$resid)=split(/\./,$id);
   57:     my $map=$hash{'map_id_'.$mapid};
   58:     my $res=$hash{'src_'.$id};
   59:     my $symb=&Apache::lonnet::encode_symb($map,$resid,$res);
   60:     return $symb;
   61: }
   62: 
   63: sub course_index {
   64:     my $r=shift;
   65:     $r->rflush();
   66: # ======================================================= Go through the course
   67:     my $c=$r->connection;
   68:     %indexhash=();
   69:     %indextitles=();
   70:     %alreadyseen=();
   71:     if (tie(%hash,'GDBM_File',$env{'request.course.fn'}.".db",
   72:             &GDBM_READER(),0640)) {
   73:         foreach (sort(keys(%hash))) {
   74:             if ($c->aborted()) { last; }
   75:             if (($_=~/^src\_(.+)$/)) {
   76:                 if ($hash{'randomout_'.$1} & !$env{'request.role.adv'}) {
   77:                     next;
   78:                 }
   79:                 my $symb=&make_symb($1);
   80:                 my %newwords=&checkonthis($r,$1,$hash{$_},0,&Apache::lonnet::gettitle($symb),
   81:                              $symb);
   82:             }
   83:         }
   84:         untie(%hash);
   85:     }
   86: # Output
   87:     $r->print(&Apache::loncommon::start_data_table());
   88:     my $currentchar='';
   89:     foreach my $lword (sort(keys(%indexhash))) {
   90:        unless ($lword=~/\w/) { next; }
   91:        if ($lword=~/^\d+$/) { next; }
   92:        my $firstchar=substr($lword,0,1);
   93:        if ($currentchar ne $firstchar) {
   94:           $r->print(&Apache::loncommon::start_data_table_header_row().
   95:                     '<th>'.$firstchar.'</th><th>&nbsp;</th>'.&Apache::loncommon::end_data_table_header_row());
   96:           $currentchar=$firstchar;
   97:        }
   98:        $r->print("\n".&Apache::loncommon::start_data_table_row()."<td>$lword</td><td>");
   99:        foreach my $href (split(/\,/,$indexhash{$lword})) {
  100:            unless ($href) { next; }
  101:            $r->print(' &nbsp; <a href="'.$href.'">'.$indextitles{$href}.'</a>');
  102:        }
  103:        $r->print("</td>".&Apache::loncommon::start_data_table_row());
  104:     }
  105:     $r->print(&Apache::loncommon::end_data_table());
  106: }
  107: 
  108: # =============================== This pulls up a resource and its dependencies
  109: 
  110: sub checkonthis {
  111:     my ($r,$id,$url,$level,$title,$symb)=@_;
  112:     $alreadyseen{$id}=1;
  113:     if (&Apache::loncommon::connection_aborted($r)) { return; }
  114:     $r->rflush();
  115: 
  116:     my $result='';
  117:     if ($env{'request.role.adv'} || !$hash{'encrypted_'.$id}) {
  118:         $result=&Apache::lonnet::metadata($url,'subject').','.
  119:                 &Apache::lonnet::metadata($url,'keywords');
  120:     }
  121:     $result=~s/\s+/\,/gs;
  122:     my $href=$url;
  123:     if ($hash{'encrypted_'.$id} && !$env{'request.role.adv'}) {
  124:         $href=&Apache::lonenc::encrypted($href)
  125:                .'?symb='.&Apache::lonenc::encrypted($symb);
  126:     } else {
  127:         $href.='?symb='.&escape($symb);
  128:     }
  129:     foreach my $word (split(/\,/,$result)) {
  130:         unless ($word) { next; }
  131:         $indexhash{lc($word)}.=','.$href;
  132:         $indextitles{$href}=($title?substr($title,0,10):'').' ...';
  133:     }
  134:     
  135:     $r->rflush();
  136: # Check also the dependencies of this one
  137:     my $dependencies=
  138:                 &Apache::lonnet::metadata($url,'dependencies');
  139:     foreach (split(/\,/,$dependencies)) {
  140:        if (($_=~/^\/res\//) && (!$alreadyseen{$id})) {
  141:           &checkonthis($r,$id,$_,$level+1,'');
  142:        }
  143:     }
  144: }
  145: 
  146: sub untiehash {
  147:     if (tied(%hash)) {
  148:         untie(%hash);
  149:     }
  150: }
  151: 
  152: sub handler {
  153:     my $r = shift;
  154:     &Apache::loncommon::content_type($r,'text/html');
  155:     $r->send_http_header;
  156:     if ($r->header_only) { return OK; }
  157: 
  158:     my $crstype = &Apache::loncommon::course_type();
  159:     &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},['phase']);
  160:     $r->print(&Apache::loncommon::start_page("$crstype Index"));
  161:     &Apache::lonhtmlcommon::clear_breadcrumbs();
  162:     &Apache::lonhtmlcommon::add_breadcrumb(
  163:             {   href => '/adm/indexcourse',
  164:                 text => "$crstype Index"});
  165:     $r->print(&Apache::lonhtmlcommon::breadcrumbs("$crstype Index"));
  166:     &Apache::lonnavdisplay::startContentScreen($r,'courseindex');
  167:     &course_index($r);
  168:     &Apache::lonnavdisplay::endContentScreen($r);
  169:     $r->print(&Apache::loncommon::end_page());
  170:     return OK;
  171: }
  172: 
  173: 1;