--- rat/lonpageflip.pm 2003/03/01 15:13:59 1.35 +++ rat/lonpageflip.pm 2005/02/17 09:09:57 1.51 @@ -2,7 +2,7 @@ # # Page flip handler # -# $Id: lonpageflip.pm,v 1.35 2003/03/01 15:13:59 www Exp $ +# $Id: lonpageflip.pm,v 1.51 2005/02/17 09:09:57 albertel Exp $ # # Copyright Michigan State University Board of Trustees # @@ -26,17 +26,6 @@ # # http://www.lon-capa.org/ # -# (Page Handler -# -# (TeX Content Handler -# -# 05/29/00,05/30 Gerd Kortemeyer) -# 08/30,08/31,09/06,09/14,09/15,09/16,09/19,09/20,09/21,09/23, -# 10/02 Gerd Kortemeyer) -# -# 10/03,10/05,10/06,10/07,10/09,10/10,10/11,10/16,10/17, -# 11/14,11/16, -# 10/01/01,05/01,05/28,07/05 Gerd Kortemeyer package Apache::lonpageflip; @@ -82,6 +71,14 @@ sub fullmove { return($rid,$mapurl); } +sub hash_src { + my ($id)=@_; + if ($hash{'encrypted_'.$id}) { + return &Apache::lonenc::encrypted($hash{'src_'.$id}); + } + return $hash{'src_'.$id}; +} + sub move { my ($rid,$mapurl,$direction)=@_; my $startoutrid=$rid; @@ -120,6 +117,10 @@ sub move { $hash{'map_type_'.$hash{'map_pc_'.$hash{'src_'.$next}}} eq 'sequence') { $mapurl=$hash{'src_'.$next}; $next=$hash{'map_start_'.$hash{'src_'.$next}}; + } elsif ( +# This jumps back up from an empty sequence, to a page up one level + $hash{'map_type_'.$hash{'map_pc_'.$hash{'src_'.$next}}} eq 'page') { + $mapurl=$hash{'map_id_'.(split(/\./,$next))[0]}; } } elsif ((split(/\./,$startoutrid))[0]!=(split(/\./,$next))[0]) { @@ -156,7 +157,11 @@ sub move { $hash{'map_type_'.$hash{'map_pc_'.$hash{'src_'.$next}}} eq 'sequence') { $mapurl=$hash{'src_'.$next}; $next=$hash{'map_finish_'.$hash{'src_'.$next}}; - } + } elsif ( + $hash{'map_type_'.$hash{'map_pc_'.$hash{'src_'.$next}}} eq 'page') { +# This jumps back up from an empty sequence, to a page up one level + $mapurl=$hash{'map_id_'.(split(/\./,$next))[0]}; + } } elsif ((split(/\./,$startoutrid))[0]!=(split(/\./,$next))[0]) { # This comes back up from a map (going up one level); @@ -174,9 +179,9 @@ sub handler { # ------------------------------------------- Set document type for header only if ($r->header_only) { - $r->content_type('text/html'); - $r->send_http_header; - return OK; + &Apache::loncommon::content_type($r,'text/html'); + $r->send_http_header; + return OK; } my %cachehash=(); @@ -185,10 +190,15 @@ sub handler { my $redirecturl=''; my $next=''; my @possibilities=(); + &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},['postdata']); if (($ENV{'form.postdata'})&&($ENV{'request.course.fn'})) { $ENV{'form.postdata'}=~/(\w+)\:(.*)/; my $direction=$1; my $currenturl=$2; + if ($currenturl=~m|^/enc/|) { + $currenturl=&Apache::lonenc::unencrypted($currenturl); + } + $currenturl=~s/\.\d+\.(\w+)$/\.$1/; if ($direction eq 'return') { # -------------------------------------------------------- Return to last known my $last; @@ -198,12 +208,24 @@ sub handler { untie(%hash); } my $newloc; - if ($last) { - $newloc=&Apache::lonnet::clutter((split(/\_\_\_/,$last))[1]); + if (($last) && (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'.db', + &GDBM_READER(),0640))) { + my ($murl,$fn)=&Apache::lonnet::decode_symb($last); + my $id; + ($murl,$id,$fn)=&Apache::lonnet::decode_symb(&Apache::lonnet::symbread($fn)); + $id=$hash{'map_pc_'.&Apache::lonnet::clutter($murl)}.'.'.$id; + $newloc=$hash{'src_'.$id}; + if ($newloc) { + if ($hash{'encrypted_'.$id}) { $newloc=&Apache::lonenc::encrypted($newloc); } + + } else { + $newloc='/adm/noidea.html'; + } + untie %hash; } else { $newloc='/adm/noidea.html'; } - $r->content_type('text/html'); + &Apache::loncommon::content_type($r,'text/html'); $r->header_out(Location => 'http://'.$ENV{'HTTP_HOST'}.$newloc); @@ -222,9 +244,9 @@ sub handler { untie(%hash); } if ($last) { - $currenturl=&Apache::lonnet::clutter((split(/\_\_\_/,$last))[1]); + $currenturl=&Apache::lonnet::clutter((&Apache::lonnet::decode_symb($last))[1]); } else { - $r->content_type('text/html'); + &Apache::loncommon::content_type($r,'text/html'); $r->header_out(Location => 'http://'.$ENV{'HTTP_HOST'}.'/adm/noidea.html'); return REDIRECT; @@ -234,7 +256,7 @@ sub handler { my $position; if ($position=Apache::lonnet::symbread($currenturl)) { # ------------------------------------------------------------------------- Yes - my ($startoutmap,$mapnum,$thisurl)=split(/\_\_\_/,$position); + my ($startoutmap,$mapnum,$thisurl)=&Apache::lonnet::decode_symb($position); $cachehash{$startoutmap}{$thisurl}=$mapnum; $cachehash{$startoutmap}{'last_known'}= &Apache::lonnet::declutter($currenturl); @@ -251,7 +273,8 @@ sub handler { # -------------------------------------- Do we have one and only one empty URL? my $safecount=0; while (($next) && ($next!~/\,/) && - ((!$hash{'src_'.$next}) || ($hash{'randomout_'.$next})) + ((!$hash{'src_'.$next}) || + ((!$ENV{'request.role.adv'}) && $hash{'randomout_'.$next})) && ($safecount<10000)) { ($next,$endupmap)=&move($next,$endupmap,$direction); $safecount++; @@ -262,7 +285,7 @@ sub handler { @possibilities=split(/\,/,$next); if ($#possibilities==0) { # ---------------------------------------------- Only one possibility, redirect - $redirecturl=$hash{'src_'.$next}; + $redirecturl=&hash_src($next); $cachehash{$endupmap} {&Apache::lonnet::declutter($redirecturl)} =(split(/\./,$next))[1]; @@ -303,6 +326,12 @@ sub handler { # ============================================== Do not return before this line if ($redirecturl) { # ----------------------------------------------------- There is a URL to go to + if ($direction eq 'forward') { + &Apache::lonnet::linklog($currenturl,$redirecturl); + } + if ($direction eq 'back') { + &Apache::lonnet::linklog($redirecturl,$currenturl); + } # ------------------------------------------------- Check for critical messages if ((time-$ENV{'user.criticalcheck.time'})>300) { my @what=&Apache::lonnet::dump @@ -317,20 +346,21 @@ sub handler { &Apache::lonnet::appenv('user.criticalcheck.time'=>time); } - $r->content_type('text/html'); + &Apache::loncommon::content_type($r,'text/html'); $r->header_out(Location => 'http://'.$ENV{'HTTP_HOST'}.$redirecturl); return REDIRECT; } else { # --------------------------------------------------------- There was a problem - $r->content_type('text/html'); + &Apache::loncommon::content_type($r,'text/html'); $r->send_http_header; if ($#possibilities>0) { + my $bodytag= + &Apache::loncommon::bodytag('Multiple Resources'); $r->print(<Choose Next Location - -

LON-CAPA

-There are several possibilities of where to go next. +$bodytag +

There are several possibilities of where to go next

Please click on the the resource you intend to access:

@@ -349,13 +379,17 @@ ENDSTART $r->print(''); return OK; } else { + my $bodytag=&Apache::loncommon::bodytag('No Resource'); $r->print(<Choose Next Location - - -

Sorry!

-

Next resource could not be identified.

-

You probably are at the beginning or the end of the course.

+No Resource +$bodytag +

Next resource could not be identified.

+

You probably are at the beginning or the end of the +course.

+ ENDNONE @@ -369,7 +403,10 @@ ENDNONE } } else { # ---------------------------------------- No, could not determine where we are - $r->internal_redirect('/adm/ambiguous'); + if ( &Apache::lonnet::mod_perl_version() == 2 ) { + &Apache::lonnet::cleanenv(); + } + $r->internal_redirect('/adm/ambiguous'); } } else { # -------------------------- Class was not initialized or page fliped strangely