--- rat/lonpageflip.pm 2000/11/14 19:14:03 1.12 +++ rat/lonpageflip.pm 2002/04/11 18:19:46 1.21 @@ -2,6 +2,30 @@ # # Page flip handler # +# $Id: lonpageflip.pm,v 1.21 2002/04/11 18:19:46 www Exp $ +# +# Copyright Michigan State University Board of Trustees +# +# This file is part of the LearningOnline Network with CAPA (LON-CAPA). +# +# LON-CAPA is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 2 of the License, or +# (at your option) any later version. +# +# LON-CAPA is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with LON-CAPA; if not, write to the Free Software +# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA +# +# /home/httpd/html/adm/gpl.txt +# +# http://www.lon-capa.org/ +# # (Page Handler # # (TeX Content Handler @@ -10,7 +34,9 @@ # 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 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; @@ -37,6 +63,80 @@ sub addrid { return $current; } +sub move { + my ($rid,$mapurl,$direction)=@_; + + my $next=''; + + my $mincond=1; + my $posnext=''; + if ($direction eq 'forward') { +# --------------------------------------------------------------------- Forward + if ($hash{'type_'.$rid} eq 'finish') { + $rid=$hash{'ids_/res/'.$mapurl}; + } + map { + my $thiscond= + &Apache::lonnet::directcondval($hash{'condid_'.$hash{'undercond_'.$_}}); + if ($thiscond>=$mincond) { + if ($posnext) { + $posnext.=','.$_.':'.$thiscond; + } else { + $posnext=$_.':'.$thiscond; + } + if ($thiscond>$mincond) { $mincond=$thiscond; } + } + } split(/\,/,$hash{'to_'.$rid}); + map { + my ($linkid,$condval)=split(/\:/,$_); + if ($condval>=$mincond) { + $next=&addrid($next,$hash{'goesto_'.$linkid}, + $hash{'condid_'.$hash{'undercond_'.$linkid}}); + } + } split(/\,/,$posnext); + if ($hash{'is_map_'.$next}) { + if ( + $hash{'map_type_'.$hash{'map_pc_'.$hash{'src_'.$next}}} eq 'sequence') { + $mapurl=$hash{'src_'.$next}; + $next=$hash{'map_start_'.$hash{'src_'.$next}}; + } + } + } elsif ($direction eq 'back') { +# ------------------------------------------------------------------- Backwards + if ($hash{'type_'.$rid} eq 'start') { + $rid=$hash{'ids_/res/'.$mapurl}; + } + map { + my $thiscond= + &Apache::lonnet::directcondval($hash{'condid_'.$hash{'undercond_'.$_}}); + if ($thiscond>=$mincond) { + if ($posnext) { + $posnext.=','.$_.':'.$thiscond; + } else { + $posnext=$_.':'.$thiscond; + } + if ($thiscond>$mincond) { $mincond=$thiscond; } + } + } split(/\,/,$hash{'from_'.$rid}); + map { + my ($linkid,$condval)=split(/\:/,$_); + if ($condval>=$mincond) { + $next=&addrid($next,$hash{'comesfrom_'.$linkid}, + $hash{'condid_'.$hash{'undercond_'.$linkid}}); + } + } split(/\,/,$posnext); + if ($hash{'is_map_'.$next}) { + if ( + $hash{'map_type_'.$hash{'map_pc_'.$hash{'src_'.$next}}} eq 'sequence') { + $mapurl=$hash{'src_'.$next}; + $next=$hash{'map_finish_'.$hash{'src_'.$next}}; + } + } + } + + return ($next,$mapurl); +} + # ================================================================ Main Handler sub handler { @@ -56,7 +156,6 @@ sub handler { my $redirecturl=''; my $next=''; my @possibilities=(); - if (($ENV{'form.postdata'})&&($ENV{'request.course.fn'})) { $ENV{'form.postdata'}=~/(\w+)\:(.*)/; my $direction=$1; @@ -83,7 +182,8 @@ sub handler { } $currenturl=~s/^http\:\/\///; $currenturl=~s/^[^\/]+//; - unless ($currenturl=~/\/res\//) { + unless (($currenturl=~/^\/res\//) || + ($currenturl=~/^\/adm\/wrapper\//)) { my $last; if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db', &GDBM_READER,0640)) { @@ -104,77 +204,34 @@ sub handler { if ($position=Apache::lonnet::symbread($currenturl)) { # ------------------------------------------------------------------------- Yes my ($mapurl,$mapnum,$thisurl)=split(/\_\_\_/,$position); - $cachehash{$thisurl}=$mapnum; + $cachehash{$mapurl}{$thisurl}=$mapnum; + $cachehash{$mapurl}{'last_known'}=&Apache::lonnet::declutter($currenturl); + my $startoutmap=$mapurl; + # ============================================================ Tie the big hash if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'.db', &GDBM_READER,0640)) { my $rid=$hash{'map_pc_/res/'.$mapurl}.'.'.$mapnum; - my $next=''; - my $mincond=1; - my $posnext=''; - if ($direction eq 'forward') { -# --------------------------------------------------------------------- Forward - map { - my $thiscond= - &Apache::lonnet::directcondval($hash{'condid_'.$hash{'undercond_'.$_}}); - if ($thiscond>=$mincond) { - if ($posnext) { - $posnext.=','.$_.':'.$thiscond; - } else { - $posnext=$_.':'.$thiscond; - } - if ($thiscond>$mincond) { $mincond=$thiscond; } - } - } split(/\,/,$hash{'to_'.$rid}); - map { - my ($linkid,$condval)=split(/\:/,$_); - if ($condval>=$mincond) { - $next=&addrid($next,$hash{'goesto_'.$linkid}, - $hash{'condid_'.$hash{'undercond_'.$linkid}}); - } - } split(/\,/,$posnext); - } elsif ($direction eq 'back') { -# ------------------------------------------------------------------- Backwards - map { - my $thiscond= - &Apache::lonnet::directcondval($hash{'condid_'.$hash{'undercond_'.$_}}); - if ($thiscond>=$mincond) { - if ($posnext) { - $posnext.=','.$_.':'.$thiscond; - } else { - $posnext=$_.':'.$thiscond; - } - if ($thiscond>$mincond) { $mincond=$thiscond; } - } - } split(/\,/,$hash{'from_'.$rid}); - map { - my ($linkid,$condval)=split(/\:/,$_); - if ($condval>=$mincond) { - $next=&addrid($next,$hash{'comesfrom_'.$linkid}, - $hash{'condid_'.$hash{'undercond_'.$linkid}}); - } - } split(/\,/,$posnext); - } elsif ($direction eq 'up') { -# -------------------------------------------------------------------------- Up - } elsif ($direction eq 'down') { -# ------------------------------------------------------------------------ Down - } + +# ------------------------------------------------- Move forward, backward, etc + + ($next,$mapurl)=&move($rid,$mapurl,$direction); +# -------------------------------------- Do we have one and only one empty URL? + my $safecount=0; + while (($next) && ($next!~/\,/) && (!$hash{'src_'.$next}) + && ($safecount<25)) { + ($next,$mapurl)=&move($next,$mapurl,$direction); + $safecount++; + } # ----------------------------------------------------- Check out possibilities if ($next) { @possibilities=split(/\,/,$next); if ($#possibilities==0) { # ---------------------------------------------- Only one possibility, redirect $redirecturl=$hash{'src_'.$next}; - $cachehash{&Apache::lonnet::declutter($redirecturl)} + $cachehash{$mapurl} + {&Apache::lonnet::declutter($redirecturl)} =(split(/\./,$next))[1]; - if ($hash{'param_'.$next}) { - my ($mapid,$resid)=split(/\./,$next); - &Apache::lonnet::appendparms( - &Apache::lonnet::declutter($hash{'map_id_'.$mapid}). - '___'.$resid.'___'. - &Apache::lonnet::declutter($redirecturl), - $hash{'param_'.$next}); - } } else { # ------------------------ There are multiple possibilities for a next resource $multichoice=1; @@ -182,20 +239,12 @@ sub handler { $multichoicehash{'src_'.$_}=$hash{'src_'.$_}; $multichoicehash{'title_'.$_}=$hash{'title_'.$_}; $multichoicehash{'type_'.$_}=$hash{'type_'.$_}; - $cachehash + $cachehash{$mapurl} {&Apache::lonnet::declutter( $multichoicehash {'src_'.$_} )} =(split(/\./,$_))[1]; - if ($hash{'param_'.$_}) { - my ($mapid,$resid)=split(/\./,$_); - &Apache::lonnet::appendparms( - &Apache::lonnet::declutter($hash{'map_id_'.$mapid}). - '___'.$resid.'___'. - &Apache::lonnet::declutter($hash{'src_'.$_}), - $hash{'param_'.$_}); - } } @possibilities; } } else { @@ -205,9 +254,10 @@ sub handler { # ----------------- The program must come past this point to untie the big hash untie(%hash); # --------------------------------------------------------- Store position info - $cachehash{'last_direction'}=$direction; - $cachehash{'last_known'}=&Apache::lonnet::declutter($currenturl); - &Apache::lonnet::symblist($mapurl,%cachehash); + $cachehash{$mapurl}{'last_direction'}=$direction; + foreach my $thismap (keys %cachehash) { + &Apache::lonnet::symblist($thismap,%{$cachehash{$thismap}}); + } # ============================================== Do not return before this line if ($redirecturl) { # ----------------------------------------------------- There is a URL to go to @@ -245,9 +295,10 @@ ENDSTART $r->print(<Choose Next Location - +

Sorry!

Next resource could not be identified.

+

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

ENDNONE