--- loncom/xml/lonxml.pm 2000/06/29 13:58:23 1.6 +++ loncom/xml/lonxml.pm 2004/11/29 22:45:51 1.347 @@ -1,195 +1,1623 @@ # The LearningOnline Network with CAPA # XML Parser Module # -# last modified 06/26/00 by Alexander Sakharuk +# $Id: lonxml.pm,v 1.347 2004/11/29 22:45:51 albertel 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/ +# +# Copyright for TtHfunc and TtMfunc by Ian Hutchinson. +# TtHfunc and TtMfunc (the "Code") may be compiled and linked into +# binary executable programs or libraries distributed by the +# Michigan State University (the "Licensee"), but any binaries so +# distributed are hereby licensed only for use in the context +# of a program or computational system for which the Licensee is the +# primary author or distributor, and which performs substantial +# additional tasks beyond the translation of (La)TeX into HTML. +# The C source of the Code may not be distributed by the Licensee +# to any other parties under any circumstances. +# -package Apache::lonxml; +package Apache::lonxml; +use vars +qw(@pwd @outputstack $redirection $import @extlinks $metamode $evaluate %insertlist @namespace $errorcount $warningcount @htmlareafields); use strict; -use HTML::TokeParser; -use Safe; -use Apache::style; -use Apache::lontexconvert; -use Apache::londefdef; -use Apache::run; +use HTML::LCParser(); +use HTML::TreeBuilder(); +use HTML::Entities(); +use Safe(); +use Safe::Hole(); +use Math::Cephes(); +use Math::Random(); +use Opcode(); +use POSIX qw(strftime); +use Time::HiRes qw( gettimeofday tv_interval ); + +sub register { + my ($space,@taglist) = @_; + foreach my $temptag (@taglist) { + push(@{ $Apache::lonxml::alltags{$temptag} },$space); + } +} + +sub deregister { + my ($space,@taglist) = @_; + foreach my $temptag (@taglist) { + my $tempspace = $Apache::lonxml::alltags{$temptag}[-1]; + if ($tempspace eq $space) { + pop(@{ $Apache::lonxml::alltags{$temptag} }); + } + } + #&printalltags(); +} + +use Apache::Constants qw(:common); +use Apache::lontexconvert(); +use Apache::style(); +use Apache::run(); +use Apache::londefdef(); +use Apache::scripttag(); +use Apache::languagetags(); +use Apache::edit(); +use Apache::inputtags(); +use Apache::outputtags(); +use Apache::lonnet(); +use Apache::File(); +use Apache::loncommon(); +use Apache::lonfeedback(); +use Apache::lonmsg(); +use Apache::loncacc(); +use Apache::lonlocal; + #================================================== Main subroutine: xmlparse +#debugging control, to turn on debugging modify the correct handler +$Apache::lonxml::debug=0; + +# keeps count of the number of warnings and errors generated in a parse +$warningcount=0; +$errorcount=0; + +#path to the directory containing the file currently being processed +@pwd=(); + +#these two are used for capturing a subset of the output for later processing, +#don't touch them directly use &startredirection and &endredirection +@outputstack = (); +$redirection = 0; + +#controls wheter the tag actually does +$import = 1; +@extlinks=(); + +# meta mode is a bit weird only some output is to be turned off +# tag turns metamode off (defined in londefdef.pm) +$metamode = 0; + +# turns on and of run::evaluate actually derefencing var refs +$evaluate = 1; + +# data structure for eidt mode, determines what tags can go into what other tags +%insertlist=(); + +# stores the list of active tag namespaces +@namespace=(); + +# has the dynamic menu been updated to know about this resource +$Apache::lonxml::registered=0; + +# a pointer the the Apache request object +$Apache::lonxml::request=''; + +# a problem number counter, and check on ether it is used +$Apache::lonxml::counter=1; +$Apache::lonxml::counter_changed=0; + +#internal check on whether to look at style defs +$Apache::lonxml::usestyle=1; + +#locations used to store the parameter string for style substitutions +$Apache::lonxml::style_values=''; +$Apache::lonxml::style_end_values=''; + +#array of ssi calls that need to occur after we are done parsing +@Apache::lonxml::ssi_info=(); + +#should we do the postag variable interpolation +$Apache::lonxml::post_evaluate=1; + +#a header message to emit in the case of any generated warning or errors +$Apache::lonxml::warnings_error_header=''; + +sub xmlbegin { + my $output=''; + @htmlareafields=(); + if ($ENV{'browser.mathml'}) { + $output='' + .'' + .']>' + .''; + } else { + $output=' +'; + } + return $output; +} + +sub xmlend { + my ($target,$parser)=@_; + my $mode='xml'; + my $status='OPEN'; + if ($Apache::lonhomework::parsing_a_problem) { + $mode='problem'; + $status=$Apache::inputtags::status[-1]; + } + my $discussion=&Apache::lonfeedback::list_discussion($mode,$status); + if ($target eq 'tex') { + $discussion.='\keephidden{ENDOFPROBLEM}\vskip 0.5mm\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}\end{document}'; + &Apache::lonxml::newparser($parser,\$discussion,''); + return ''; + } else { + return $discussion.''; + } +} + +sub tokeninputfield { + my $defhost=$Apache::lonnet::perlvar{'lonHostID'}; + $defhost=~tr/a-z/A-Z/; + return (< + function updatetoken() { + var comp=new Array; + var barcode=unescape(document.tokeninput.barcode.value); + comp=barcode.split('*'); + if (typeof(comp[0])!="undefined") { + document.tokeninput.codeone.value=comp[0]; + } + if (typeof(comp[1])!="undefined") { + document.tokeninput.codetwo.value=comp[1]; + } + if (typeof(comp[2])!="undefined") { + comp[2]=comp[2].toUpperCase(); + document.tokeninput.codethree.value=comp[2]; + } + document.tokeninput.barcode.value=''; + } + +
+ + + + +
DocID Checkin
+ + + + + + + +
Scan in Barcode
or Type in DocID + +* + +* + +
+
+
+ENDINPUTFIELD +} + +sub maketoken { + my ($symb,$tuname,$tudom,$tcrsid)=@_; + unless ($symb) { + $symb=&Apache::lonnet::symbread(); + } + unless ($tuname) { + $tuname=$ENV{'user.name'}; + $tudom=$ENV{'user.domain'}; + $tcrsid=$ENV{'request.course.id'}; + } + + return &Apache::lonnet::checkout($symb,$tuname,$tudom,$tcrsid); +} + +sub printtokenheader { + my ($target,$token,$tsymb,$tcrsid,$tudom,$tuname)=@_; + unless ($token) { return ''; } + + my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser(); + unless ($tsymb) { + $tsymb=$symb; + } + unless ($tuname) { + $tuname=$name; + $tudom=$domain; + $tcrsid=$courseid; + } + + my %reply=&Apache::lonnet::get('environment', + ['firstname','middlename','lastname','generation'], + $tudom,$tuname); + my $plainname=$reply{'firstname'}.' '. + $reply{'middlename'}.' '. + $reply{'lastname'}.' '. + $reply{'generation'}; + + if ($target eq 'web') { + my %idhash=&Apache::lonnet::idrget($tudom,($tuname)); + return + ''. + &mt('Checked out for').' '.$plainname. + '
'.&mt('User').': '.$tuname.' at '.$tudom. + '
'.&mt('ID').': '.$idhash{$tuname}. + '
'.&mt('CourseID').': '.$tcrsid. + '
'.&mt('Course').': '.$ENV{'course.'.$tcrsid.'.description'}. + '
'.&mt('DocID').': '.$token. + '
'.&mt('Time').': '.&Apache::lonlocal::locallocaltime().'
'; + } else { + return $token; + } +} + +sub fontsettings() { + my $headerstring=''; + if (($ENV{'browser.os'} eq 'mac') && (!$ENV{'browser.mathml'})) { + $headerstring.= + ''; + } elsif (!$ENV{'browser.mathml'} && $ENV{'browser.unicode'}) { + $headerstring.= + ''; + } + return $headerstring; +} + +sub printalltags { + my $temp; + foreach $temp (sort keys %Apache::lonxml::alltags) { + &Apache::lonxml::debug("$temp -- ". + join(',',@{ $Apache::lonxml::alltags{$temp} })); + } +} sub xmlparse { + my ($request,$target,$content_file_string,$safeinit,%style_for_target) = @_; + + &setup_globals($request,$target); + &Apache::inputtags::initialize_inputtags(); + &Apache::outputtags::initialize_outputtags(); + &Apache::edit::initialize_edit(); + &Apache::londefdef::initialize_londefdef(); + +# +# do we have a course style file? +# + + if ($ENV{'request.course.id'} && $ENV{'request.state'} ne 'construct') { + my $bodytext= + $ENV{'course.'.$ENV{'request.course.id'}.'.default_xml_style'}; + if ($bodytext) { + foreach my $file (split(',',$bodytext)) { + my $location=&Apache::lonnet::filelocation('',$file); + my $styletext=&Apache::lonnet::getfile($location); + if ($styletext ne '-1') { + %style_for_target = (%style_for_target, + &Apache::style::styleparser($target,$styletext)); + } + } + } + } elsif ($ENV{'construct.style'} && ($ENV{'request.state'} eq 'construct')) { + my $location=&Apache::lonnet::filelocation('',$ENV{'construct.style'}); + my $styletext=&Apache::lonnet::getfile($location); + if ($styletext ne '-1') { + %style_for_target = (%style_for_target, + &Apache::style::styleparser($target,$styletext)); + } + } +#&printalltags(); + my @pars = (); + my $pwd=$ENV{'request.filename'}; + $pwd =~ s:/[^/]*$::; + &newparser(\@pars,\$content_file_string,$pwd); - my ($target,$content_file_string,%style_for_target) = @_; - my $pars = HTML::TokeParser->new(\$content_file_string); - my $currentstring = ''; - my $finaloutput = ''; - my $newarg = ''; - my $tempostring = ''; - my $tempocont = ''; my $safeeval = new Safe; - $safeeval->permit("entereval"); + my $safehole = new Safe::Hole; + &init_safespace($target,$safeeval,$safehole,$safeinit); #-------------------- Redefinition of the target in the case of compound target ($target, my @tenta) = split('&&',$target); -#------------------------- Stack definition (in stack we have all current tags) - - my @stack = (); + my @stack = (); my @parstack = (); + &initdepth; -#------------------------------------- Parse input string (content_file_string) - - my $token; - - while ($token = $pars->get_token) { - if ($token->[0] eq 'T') { - $finaloutput .= $token->[1]; - $tempocont .= $token->[1]; - } elsif ($token->[0] eq 'S') { -#------------------------------------------------------------- add tag to stack - push (@stack,$token->[1]); -#----------------------------------------- add parameters list to another stack - map {$tempostring .= "$_=$token->[2]->{$_},"} @{$token->[3]}; - push (@parstack,$tempostring); - $tempostring = ''; - - if (exists $style_for_target{$token->[1]}) { -# print "Style for $token->[1] is " .$style_for_target{$token->[1]}."\n"; -#---------------------------------------------------- use style file definition - - $newarg = $style_for_target{$token->[1]}; - - if (index($newarg,'script') != -1 ) { - my $pat = HTML::TokeParser->new(\$newarg); - my $tokenpat = ''; - my $partstring = ''; - my $oustring = ''; - my $outputstring; - - while ($tokenpat = $pat->get_token) { - if ($tokenpat->[0] eq 'T') { -# print "evaluating $tokenpat->[4]\n"; - $oustring .= &Apache::run::evaluate($tokenpat->[1],$safeeval); - } elsif ($tokenpat->[0] eq 'S') { - if ($tokenpat->[1] eq 'script') { - while ($tokenpat = $pat->get_token and $tokenpat->[1] ne 'script') { - if ($tokenpat->[0] eq 'S') { - $partstring .= $tokenpat->[4]; - } elsif ($tokenpat->[0] eq 'T') { - $partstring .= $tokenpat->[1]; - } elsif ($tokenpat->[0] eq 'E') { - $partstring .= $tokenpat->[2]; - } - } - - map {$partstring =~ s/\$$_/$token->[2]->{$_}/g; } @{$token->[3]}; -# print "want to use run\n"; - &Apache::run::run($partstring,$safeeval); - - $partstring = ''; - } else { -# print "evaluating $tokenpat->[4]\n"; - $oustring .= &Apache::run::evaluate($tokenpat->[4],$safeeval); - } - } elsif ($tokenpat->[0] eq 'E' and $tokenpat->[1] ne 'evaluate') { -# print "hereish\n"; - $oustring .= $tokenpat->[1]; - } - } - $newarg = $oustring; - } else { - map {$newarg =~ s/\$$_/$token->[2]->{$_}/g; } @{$token->[3]}; - } - $finaloutput .= $newarg; - } else { - # use default definition of tag - my $sub="start_$token->[1]"; - { - no strict 'refs'; - if (defined (&$sub)) { - $currentstring = &$sub($target,$token,\@parstack); - $finaloutput .= $currentstring; - $currentstring = ''; - } else { - $finaloutput .= $token->[4]; - } - use strict 'refs'; - } - } - } elsif ($token->[0] eq 'E') { - # Put here check for correct final tag (to avoid existence of - # starting tag only) - - pop @stack; - unless (exists $style_for_target{$token->[1]}) { - my $sub="end_$token->[1]"; - { - no strict 'refs'; - if (defined(&$sub)) { - $currentstring = &$sub($target,$token,\@parstack); - $finaloutput .= $currentstring; - $currentstring = ''; - } else { - $finaloutput .= $token->[4]; - } - use strict 'refs'; - } - } - #---- end tag from the style file - if (exists $style_for_target{'/'."$token->[1]"}) { - $newarg = $style_for_target{'/'."$token->[1]"}; - if (index($newarg,'script') != -1 ) { - my $pat = HTML::TokeParser->new(\$newarg); - my $tokenpat; - my $partstring = ''; - my $oustring = ''; - my $outputstring; - - while ($tokenpat = $pat->get_token) { - if ($tokenpat->[0] eq 'T') { - $oustring .= $tokenpat->[1]; - } elsif ($tokenpat->[0] eq 'S') { - if ($tokenpat->[1] eq 'script') { - while ($tokenpat = $pat->get_token and $tokenpat->[1] ne 'script') { - if ($tokenpat->[0] eq 'S') { - $partstring .= $tokenpat->[4]; - } elsif ($tokenpat->[0] eq 'T') { - $partstring .= $tokenpat->[1]; - } elsif ($tokenpat->[0] eq 'E') { - $partstring .= $tokenpat->[2]; - } - } - - my @tempor_list = split(',',$parstack[$#parstack]); - my @te_kl = (); - my %tempor_hash = (); - map {(my $onete,my $twote) = split('=',$_); push (@te_kl,$onete); - $tempor_hash{$onete} = $twote} @tempor_list; - map {$partstring =~ s/\$$_/$tempor_hash{$_}/g; } @te_kl; - print "want to use run\n"; - &Apache::run::run($partstring,$safeeval); - - $partstring = ''; - } elsif ($tokenpat->[1] eq 'evaluate') { - $outputstring = &Apache::run::evaluate($tokenpat->[2]{expression},$safeeval); - $oustring .= $outputstring; - } else { - $oustring .= $tokenpat->[4]; - } - } elsif ($tokenpat->[0] eq 'E' and $tokenpat->[1] ne 'evaluate') { - $oustring .= $tokenpat->[1]; - } - } - $newarg = $oustring; - } else { - my @very_temp = split(',',$parstack[$#parstack]); - map {my @ret= split('=',$_); $newarg =~ s/\$$ret[0]/$ret[1]/g; } @very_temp; - } - - $finaloutput .= $newarg; - } - pop @parstack; - } + my $finaloutput = &inner_xmlparse($target,\@stack,\@parstack,\@pars, + $safeeval,\%style_for_target); + + if ($ENV{'request.uri'}) { + &writeallows($ENV{'request.uri'}); } + &do_registered_ssi(); + if ($Apache::lonxml::counter_changed) { &store_counter() } return $finaloutput; } +sub htmlclean { + my ($raw,$full)=@_; + + my $tree = HTML::TreeBuilder->new; + $tree->ignore_unknown(0); + + $tree->parse($raw); + + my $output= $tree->as_HTML(undef,' '); + + $output=~s/\<(br|hr|img|meta|allow)(.*?)\>/\<$1$2 \/\>/gis; + $output=~s/\<\/(br|hr|img|meta|allow)\>//gis; + unless ($full) { + $output=~s/\<[\/]*(body|head|html)\>//gis; + } + + $tree = $tree->delete; + + return $output; +} + +sub latex_special_symbols { + my ($string,$where)=@_; + if ($where eq 'header') { + $string =~ s/(\\|_|\^)/ /g; + $string =~ s/(\$|%|\{|\})/\\$1/g; + $string =~ s/_/ /g; + $string=&Apache::lonprintout::character_chart($string); + # any & or # leftover should be safe to just escape + $string=~s/([^\\])\&/$1\\\&/g; + $string=~s/([^\\])\#/$1\\\#/g; + } else { + $string=~s/\\/\\ensuremath{\\backslash}/g; + $string=~s/([^\\]|^)\%/$1\\\%/g; + $string=~s/([^\\]|^)\$/$1\\\$/g; + $string=~s/([^\\])\_/$1\\_/g; + $string=~s/\$\$/\$\\\$/g; + $string=~s/\_\_/\_\\\_/g; + $string=~s/\#\#/\#\\\#/g; + $string=~s/([^\\]|^)(\~|\^)/$1\\$2\\strut /g; + $string=~s/(>|<)/\\ensuremath\{$1\}/g; #more or less + $string=&Apache::lonprintout::character_chart($string); + # any & or # leftover should be safe to just escape + $string=~s/([^\\]|^)\&/$1\\\&/g; + $string=~s/([^\\]|^)\#/$1\\\#/g; + $string=~s/\|/\$\\mid\$/g; +#single { or } How to escape? + } + return $string; +} + +sub inner_xmlparse { + my ($target,$stack,$parstack,$pars,$safeeval,$style_for_target)=@_; + my $finaloutput = ''; + my $result; + my $token; + my $dontpop=0; + while ( $#$pars > -1 ) { + while ($token = $$pars['-1']->get_token) { + if (($token->[0] eq 'T') || ($token->[0] eq 'C') ) { + if ($metamode<1) { + my $text=$token->[1]; + if ($token->[0] eq 'C' && $target eq 'tex') { + $text = ''; +# $text = '%'.$text."\n"; + } + $result.=$text; + } + } elsif (($token->[0] eq 'D')) { + if ($metamode<1 && $target eq 'web') { + my $text=$token->[1]; + $result.=$text; + } + } elsif ($token->[0] eq 'PI') { + if ($metamode<1 && $target eq 'web') { + $result=$token->[2]; + } + } elsif ($token->[0] eq 'S') { + # add tag to stack + push (@$stack,$token->[1]); + # add parameters list to another stack + push (@$parstack,&parstring($token)); + &increasedepth($token); + if ($Apache::lonxml::usestyle && + exists($$style_for_target{$token->[1]})) { + $Apache::lonxml::usestyle=0; + my $string=$$style_for_target{$token->[1]}. + ''; + &Apache::lonxml::newparser($pars,\$string); + $Apache::lonxml::style_values=$$parstack[-1]; + $Apache::lonxml::style_end_values=$$parstack[-1]; + } else { + $result = &callsub("start_$token->[1]", $target, $token, $stack, + $parstack, $pars, $safeeval, $style_for_target); + } + } elsif ($token->[0] eq 'E') { + if ($Apache::lonxml::usestyle && + exists($$style_for_target{'/'."$token->[1]"})) { + $Apache::lonxml::usestyle=0; + my $string=$$style_for_target{'/'.$token->[1]}. + ''; + &Apache::lonxml::newparser($pars,\$string); + $Apache::lonxml::style_values=$Apache::lonxml::style_end_values; + $Apache::lonxml::style_end_values=''; + $dontpop=1; + } else { + #clear out any tags that didn't end + while ($token->[1] ne $$stack['-1'] && ($#$stack > -1)) { + my $lasttag=$$stack[-1]; + if ($token->[1] =~ /^\Q$lasttag\E$/i) { + &Apache::lonxml::warning('Using tag </'.$token->[1].'> on line '.$token->[3].' as end tag to <'.$$stack[-1].'>'); + last; + } else { + &Apache::lonxml::warning('Found tag </'.$token->[1].'> on line '.$token->[3].' when looking for </'.$$stack[-1].'> in file'); + &end_tag($stack,$parstack,$token); + } + } + $result = &callsub("end_$token->[1]", $target, $token, $stack, + $parstack, $pars,$safeeval, $style_for_target); + } + } else { + &Apache::lonxml::error("Unknown token event :$token->[0]:$token->[1]:"); + } + #evaluate variable refs in result + if ($Apache::lonxml::post_evaluate &&$result ne "") { + my $extras; + if (!$Apache::lonxml::usestyle) { + $extras=$Apache::lonxml::style_values; + } + if ( $#$parstack > -1 ) { + $result=&Apache::run::evaluate($result,$safeeval,$extras.$$parstack[-1]); + } else { + $result= &Apache::run::evaluate($result,$safeeval,$extras); + } + } + $Apache::lonxml::post_evaluate=1; + + if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) { + #Style file definitions should be correct + if ($target eq 'tex' && ($Apache::lonxml::usestyle)) { + $result=&latex_special_symbols($result); + } + } + + if ($Apache::lonxml::redirection) { + $Apache::lonxml::outputstack['-1'] .= $result; + } else { + $finaloutput.=$result; + } + $result = ''; + + if ($token->[0] eq 'E' && !$dontpop) { + &end_tag($stack,$parstack,$token); + } + $dontpop=0; + } + if ($#$pars > -1) { + pop @$pars; + pop @Apache::lonxml::pwd; + } + } + + # if ($target eq 'meta') { + # $finaloutput.=&endredirection; + # } + + + if (($ENV{'QUERY_STRING'}) && ($target eq 'web')) { + $finaloutput=&afterburn($finaloutput); + } + return $finaloutput; +} + +## +## Looks to see if there is a subroutine defined for this tag. If so, call it, +## otherwise do not call it as we do not know what it is. +## +sub callsub { + my ($sub,$target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; + my $currentstring=''; + my $nodefault; + { + my $sub1; + no strict 'refs'; + my $tag=$token->[1]; +# get utterly rid of extended html tags + if ($tag=~/^x\-/i) { return ''; } + my $space=$Apache::lonxml::alltags{$tag}[-1]; + if (!$space) { + $tag=~tr/A-Z/a-z/; + $sub=~tr/A-Z/a-z/; + $space=$Apache::lonxml::alltags{$tag}[-1] + } + + my $deleted=0; + $Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter); + if (($token->[0] eq 'S') && ($target eq 'modified')) { + $deleted=&Apache::edit::handle_delete($space,$target,$token,$tagstack, + $parstack,$parser,$safeeval, + $style); + } + if (!$deleted) { + if ($space) { + #&Apache::lonxml::debug("Calling sub $sub in $space $metamode"); + $sub1="$space\:\:$sub"; + ($currentstring,$nodefault) = &$sub1($target,$token,$tagstack, + $parstack,$parser,$safeeval, + $style); + } else { + if ($target eq 'tex') { + # throw away tag name + return ''; + } + #&Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode"); + if ($metamode <1) { + if (defined($token->[4]) && ($metamode < 1)) { + $currentstring = $token->[4]; + } else { + $currentstring = $token->[2]; + } + } + } + # &Apache::lonxml::debug("nodefalt:$nodefault:"); + if ($currentstring eq '' && $nodefault eq '') { + if ($target eq 'edit') { + #&Apache::lonxml::debug("doing default edit for $token->[1]"); + if ($token->[0] eq 'S') { + $currentstring = &Apache::edit::tag_start($target,$token); + } elsif ($token->[0] eq 'E') { + $currentstring = &Apache::edit::tag_end($target,$token); + } + } elsif ($target eq 'modified') { + if ($token->[0] eq 'S') { + $currentstring = $token->[4]; + $currentstring.=&Apache::edit::handle_insert(); + } elsif ($token->[0] eq 'E') { + $currentstring = $token->[2]; + $currentstring.=&Apache::edit::handle_insertafter($token->[1]); + } else { + $currentstring = $token->[2]; + } + } + } + } + use strict 'refs'; + } + return $currentstring; +} + +sub setup_globals { + my ($request,$target)=@_; + $Apache::lonxml::request=$request; + $Apache::lonxml::registered = 0; + @Apache::lonxml::htmlareafields=(); + $errorcount=0; + $warningcount=0; + $Apache::lonxml::default_homework_loaded=0; + $Apache::lonxml::usestyle=1; + &init_counter(); + @Apache::lonxml::pwd=(); + @Apache::lonxml::extlinks=(); + @Apache::lonxml::ssi_info=(); + $Apache::lonxml::post_evaluate=1; + $Apache::lonxml::warnings_error_header=''; + if ($target eq 'meta') { + $Apache::lonxml::redirection = 0; + $Apache::lonxml::metamode = 1; + $Apache::lonxml::evaluate = 1; + $Apache::lonxml::import = 0; + } elsif ($target eq 'answer') { + $Apache::lonxml::redirection = 0; + $Apache::lonxml::metamode = 1; + $Apache::lonxml::evaluate = 1; + $Apache::lonxml::import = 1; + } elsif ($target eq 'grade') { + &startredirection; + $Apache::lonxml::metamode = 0; + $Apache::lonxml::evaluate = 1; + $Apache::lonxml::import = 1; + } elsif ($target eq 'modified') { + $Apache::lonxml::redirection = 0; + $Apache::lonxml::metamode = 0; + $Apache::lonxml::evaluate = 0; + $Apache::lonxml::import = 0; + } elsif ($target eq 'edit') { + $Apache::lonxml::redirection = 0; + $Apache::lonxml::metamode = 0; + $Apache::lonxml::evaluate = 0; + $Apache::lonxml::import = 0; + } elsif ($target eq 'analyze') { + $Apache::lonxml::redirection = 0; + $Apache::lonxml::metamode = 0; + $Apache::lonxml::evaluate = 1; + $Apache::lonxml::import = 1; + } else { + $Apache::lonxml::redirection = 0; + $Apache::lonxml::metamode = 0; + $Apache::lonxml::evaluate = 1; + $Apache::lonxml::import = 1; + } +} + +sub init_safespace { + my ($target,$safeeval,$safehole,$safeinit) = @_; + $safeeval->permit("entereval"); + $safeeval->permit(":base_math"); + $safeeval->permit("sort"); + $safeeval->permit("time"); + $safeeval->deny(":base_io"); + $safehole->wrap(\&Apache::scripttag::xmlparse,$safeeval,'&xmlparse'); + $safehole->wrap(\&Apache::outputtags::multipart,$safeeval,'&multipart'); + $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT'); + $safehole->wrap(\&Apache::chemresponse::chem_standard_order,$safeeval, + '&chem_standard_order'); + + $safehole->wrap(\&Math::Cephes::asin,$safeeval,'&asin'); + $safehole->wrap(\&Math::Cephes::acos,$safeeval,'&acos'); + $safehole->wrap(\&Math::Cephes::atan,$safeeval,'&atan'); + $safehole->wrap(\&Math::Cephes::sinh,$safeeval,'&sinh'); + $safehole->wrap(\&Math::Cephes::cosh,$safeeval,'&cosh'); + $safehole->wrap(\&Math::Cephes::tanh,$safeeval,'&tanh'); + $safehole->wrap(\&Math::Cephes::asinh,$safeeval,'&asinh'); + $safehole->wrap(\&Math::Cephes::acosh,$safeeval,'&acosh'); + $safehole->wrap(\&Math::Cephes::atanh,$safeeval,'&atanh'); + $safehole->wrap(\&Math::Cephes::erf,$safeeval,'&erf'); + $safehole->wrap(\&Math::Cephes::erfc,$safeeval,'&erfc'); + $safehole->wrap(\&Math::Cephes::j0,$safeeval,'&j0'); + $safehole->wrap(\&Math::Cephes::j1,$safeeval,'&j1'); + $safehole->wrap(\&Math::Cephes::jn,$safeeval,'&jn'); + $safehole->wrap(\&Math::Cephes::jv,$safeeval,'&jv'); + $safehole->wrap(\&Math::Cephes::y0,$safeeval,'&y0'); + $safehole->wrap(\&Math::Cephes::y1,$safeeval,'&y1'); + $safehole->wrap(\&Math::Cephes::yn,$safeeval,'&yn'); + $safehole->wrap(\&Math::Cephes::yv,$safeeval,'&yv'); + + $safehole->wrap(\&Math::Cephes::bdtr ,$safeeval,'&bdtr' ); + $safehole->wrap(\&Math::Cephes::bdtrc ,$safeeval,'&bdtrc' ); + $safehole->wrap(\&Math::Cephes::bdtri ,$safeeval,'&bdtri' ); + $safehole->wrap(\&Math::Cephes::btdtr ,$safeeval,'&btdtr' ); + $safehole->wrap(\&Math::Cephes::chdtr ,$safeeval,'&chdtr' ); + $safehole->wrap(\&Math::Cephes::chdtrc,$safeeval,'&chdtrc'); + $safehole->wrap(\&Math::Cephes::chdtri,$safeeval,'&chdtri'); + $safehole->wrap(\&Math::Cephes::fdtr ,$safeeval,'&fdtr' ); + $safehole->wrap(\&Math::Cephes::fdtrc ,$safeeval,'&fdtrc' ); + $safehole->wrap(\&Math::Cephes::fdtri ,$safeeval,'&fdtri' ); + $safehole->wrap(\&Math::Cephes::gdtr ,$safeeval,'&gdtr' ); + $safehole->wrap(\&Math::Cephes::gdtrc ,$safeeval,'&gdtrc' ); + $safehole->wrap(\&Math::Cephes::nbdtr ,$safeeval,'&nbdtr' ); + $safehole->wrap(\&Math::Cephes::nbdtrc,$safeeval,'&nbdtrc'); + $safehole->wrap(\&Math::Cephes::nbdtri,$safeeval,'&nbdtri'); + $safehole->wrap(\&Math::Cephes::ndtr ,$safeeval,'&ndtr' ); + $safehole->wrap(\&Math::Cephes::ndtri ,$safeeval,'&ndtri' ); + $safehole->wrap(\&Math::Cephes::pdtr ,$safeeval,'&pdtr' ); + $safehole->wrap(\&Math::Cephes::pdtrc ,$safeeval,'&pdtrc' ); + $safehole->wrap(\&Math::Cephes::pdtri ,$safeeval,'&pdtri' ); + $safehole->wrap(\&Math::Cephes::stdtr ,$safeeval,'&stdtr' ); + $safehole->wrap(\&Math::Cephes::stdtri,$safeeval,'&stdtri'); + +# $safehole->wrap(\&Math::Cephes::new_fract,$safeeval,'&new_fract'); +# $safehole->wrap(\&Math::Cephes::radd,$safeeval,'&radd'); +# $safehole->wrap(\&Math::Cephes::rsub,$safeeval,'&rsub'); +# $safehole->wrap(\&Math::Cephes::rmul,$safeeval,'&rmul'); +# $safehole->wrap(\&Math::Cephes::rdiv,$safeeval,'&rdiv'); +# $safehole->wrap(\&Math::Cephes::euclid,$safeeval,'&euclid'); + + $safehole->wrap(\&Math::Random::random_beta,$safeeval,'&math_random_beta'); + $safehole->wrap(\&Math::Random::random_chi_square,$safeeval,'&math_random_chi_square'); + $safehole->wrap(\&Math::Random::random_exponential,$safeeval,'&math_random_exponential'); + $safehole->wrap(\&Math::Random::random_f,$safeeval,'&math_random_f'); + $safehole->wrap(\&Math::Random::random_gamma,$safeeval,'&math_random_gamma'); + $safehole->wrap(\&Math::Random::random_multivariate_normal,$safeeval,'&math_random_multivariate_normal'); + $safehole->wrap(\&Math::Random::random_multinomial,$safeeval,'&math_random_multinomial'); + $safehole->wrap(\&Math::Random::random_noncentral_chi_square,$safeeval,'&math_random_noncentral_chi_square'); + $safehole->wrap(\&Math::Random::random_noncentral_f,$safeeval,'&math_random_noncentral_f'); + $safehole->wrap(\&Math::Random::random_normal,$safeeval,'&math_random_normal'); + $safehole->wrap(\&Math::Random::random_permutation,$safeeval,'&math_random_permutation'); + $safehole->wrap(\&Math::Random::random_permuted_index,$safeeval,'&math_random_permuted_index'); + $safehole->wrap(\&Math::Random::random_uniform,$safeeval,'&math_random_uniform'); + $safehole->wrap(\&Math::Random::random_poisson,$safeeval,'&math_random_poisson'); + $safehole->wrap(\&Math::Random::random_uniform_integer,$safeeval,'&math_random_uniform_integer'); + $safehole->wrap(\&Math::Random::random_negative_binomial,$safeeval,'&math_random_negative_binomial'); + $safehole->wrap(\&Math::Random::random_binomial,$safeeval,'&math_random_binomial'); + $safehole->wrap(\&Math::Random::random_seed_from_phrase,$safeeval,'&random_seed_from_phrase'); + $safehole->wrap(\&Math::Random::random_set_seed_from_phrase,$safeeval,'&random_set_seed_from_phrase'); + $safehole->wrap(\&Math::Random::random_get_seed,$safeeval,'&random_get_seed'); + $safehole->wrap(\&Math::Random::random_set_seed,$safeeval,'&random_set_seed'); + $safehole->wrap(\&Apache::lonxml::error,$safeeval,'&LONCAPA_INTERNAL_ERROR'); + $safehole->wrap(\&Apache::lonxml::debug,$safeeval,'&LONCAPA_INTERNAL_DEBUG'); + $safehole->wrap(\&Apache::caparesponse::get_sigrange,$safeeval,'&LONCAPA_INTERNAL_get_sigrange'); + +#need to inspect this class of ops +# $safeeval->deny(":base_orig"); + $safeeval->permit("require"); + $safeinit .= ';$external::target="'.$target.'";'; + my $rndseed; + my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser(); + $rndseed=&Apache::lonnet::rndseed($symb,$courseid,$domain,$name); + $safeinit .= ';$external::randomseed="'.$rndseed.'";'; + &Apache::lonxml::debug("Setting rndseed to $rndseed"); + &Apache::run::run($safeinit,$safeeval); + +} + +sub default_homework_load { + my ($safeeval)=@_; + &Apache::lonxml::debug('Loading default_homework'); + my $default=&Apache::lonnet::getfile('/home/httpd/html/res/adm/includes/default_homework.lcpm'); + if ($default eq -1) { + &Apache::lonxml::error("Unable to find default_homework.lcpm"); + } else { + &Apache::run::run($default,$safeeval); + $Apache::lonxml::default_homework_loaded=1; + } +} + +my $metamode_was; +sub startredirection { + if (!$Apache::lonxml::redirection) { + $metamode_was=$Apache::lonxml::metamode; + } + $Apache::lonxml::metamode=0; + $Apache::lonxml::redirection++; + push (@Apache::lonxml::outputstack, ''); +} + +sub endredirection { + if (!$Apache::lonxml::redirection) { + &Apache::lonxml::error("Endredirection was called, before a startredirection, perhaps you have unbalanced tags. Some debuging information:".join ":",caller); + return ''; + } + $Apache::lonxml::redirection--; + if (!$Apache::lonxml::redirection) { + $Apache::lonxml::metamode=$metamode_was; + } + pop @Apache::lonxml::outputstack; +} + +sub end_tag { + my ($tagstack,$parstack,$token)=@_; + pop(@$tagstack); + pop(@$parstack); + &decreasedepth($token); +} + +sub initdepth { + @Apache::lonxml::depthcounter=(); + $Apache::lonxml::depth=-1; + $Apache::lonxml::olddepth=-1; +} + +my @timers; +my $lasttime; +sub increasedepth { + my ($token) = @_; + $Apache::lonxml::depth++; + $Apache::lonxml::depthcounter[$Apache::lonxml::depth]++; + if ($Apache::lonxml::depthcounter[$Apache::lonxml::depth]==1) { + $Apache::lonxml::olddepth=$Apache::lonxml::depth; + } + my $time; + if ($Apache::lonxml::debug eq "1") { + push(@timers,[&gettimeofday()]); + $time=&tv_interval($lasttime); + $lasttime=[&gettimeofday()]; + } + my $spacing=' 'x($Apache::lonxml::depth-1); + my $curdepth=join('_',@Apache::lonxml::depthcounter); + &Apache::lonxml::debug("s$spacing$Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1] : $time : \n"); +#print "
s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n"; +} + +sub decreasedepth { + my ($token) = @_; + $Apache::lonxml::depth--; + if ($Apache::lonxml::depth<$Apache::lonxml::olddepth-1) { + $#Apache::lonxml::depthcounter--; + $Apache::lonxml::olddepth=$Apache::lonxml::depth+1; + } + if ( $Apache::lonxml::depth < -1) { + &Apache::lonxml::warning(&mt("Missing tags, unable to properly run file.")); + $Apache::lonxml::depth='-1'; + } + my ($timer,$time); + if ($Apache::lonxml::debug eq "1") { + $timer=pop(@timers); + $time=&tv_interval($lasttime); + $lasttime=[&gettimeofday()]; + } + my $spacing=' 'x$Apache::lonxml::depth; + my $curdepth=join('_',@Apache::lonxml::depthcounter); + &Apache::lonxml::debug("e$spacing$Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1] : $time : ".&tv_interval($timer)."\n"); +#print "
e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n"; +} + +sub get_all_text_unbalanced { +#there is a copy of this in lonpublisher.pm + my($tag,$pars)= @_; + my $token; + my $result=''; + $tag='<'.$tag.'>'; + while ($token = $$pars[-1]->get_token) { + if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) { + $result.=$token->[1]; + } elsif ($token->[0] eq 'PI') { + $result.=$token->[2]; + } elsif ($token->[0] eq 'S') { + $result.=$token->[4]; + } elsif ($token->[0] eq 'E') { + $result.=$token->[2]; + } + if ($result =~ /\Q$tag\E/is) { + ($result,my $redo)=$result =~ /(.*)\Q$tag\E(.*)/is; + #&Apache::lonxml::debug('Got a winner with leftovers ::'.$2); + #&Apache::lonxml::debug('Result is :'.$1); + $redo=$tag.$redo; + &Apache::lonxml::newparser($pars,\$redo); + last; + } + } + return $result +} + +sub increment_counter { + my ($increment) = @_; + if (defined($increment) && $increment gt 0) { + $Apache::lonxml::counter+=$increment; + } else { + $Apache::lonxml::counter++; + } + $Apache::lonxml::counter_changed=1; +} + +sub init_counter { + if (defined($ENV{'form.counter'})) { + $Apache::lonxml::counter=$ENV{'form.counter'}; + $Apache::lonxml::counter_changed=0; + } else { + $Apache::lonxml::counter=1; + $Apache::lonxml::counter_changed=1; + } +} + +sub store_counter { + &Apache::lonnet::appenv(('form.counter' => $Apache::lonxml::counter)); + return ''; +} + +sub get_all_text { + my($tag,$pars,$style)= @_; + my $gotfullstack=1; + if (ref($pars) ne 'ARRAY') { + $gotfullstack=0; + $pars=[$pars]; + } + if (ref($style) ne 'HASH') { + $style={}; + } + my $depth=0; + my $token; + my $result=''; + if ( $tag =~ m:^/: ) { + my $tag=substr($tag,1); + #&Apache::lonxml::debug("have:$tag:"); + my $top_empty=0; + while (($depth >=0) && ($#$pars > -1) && (!$top_empty)) { + while (($depth >=0) && ($token = $$pars[-1]->get_token)) { + #&Apache::lonxml::debug("e token:$token->[0]:$depth:$token->[1]:".$#$pars.":".$#Apache::lonxml::pwd); + if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) { + $result.=$token->[1]; + } elsif ($token->[0] eq 'PI') { + $result.=$token->[2]; + } elsif ($token->[0] eq 'S') { + if ($token->[1] =~ /^\Q$tag\E$/i) { $depth++; } + if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/) { $Apache::lonxml::usestyle=1; } + if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/) { $Apache::lonxml::usestyle=0; } + $result.=$token->[4]; + } elsif ($token->[0] eq 'E') { + if ( $token->[1] =~ /^\Q$tag\E$/i) { $depth--; } + #skip sending back the last end tag + if ($depth == 0 && exists($$style{'/'.$token->[1]}) && $Apache::lonxml::usestyle) { + my $string= + ''. + $$style{'/'.$token->[1]}. + $token->[2]. + ''; + &Apache::lonxml::newparser($pars,\$string); + #&Apache::lonxml::debug("reParsing $string"); + next; + } + if ($depth > -1) { + $result.=$token->[2]; + } else { + $$pars[-1]->unget_token($token); + } + } + } + if (($depth >=0) && ($#$pars == 0) ) { $top_empty=1; } + if (($depth >=0) && ($#$pars > 0) ) { + pop(@$pars); + pop(@Apache::lonxml::pwd); + } + } + if ($top_empty && $depth >= 0) { + #never found the end tag ran out of text, throw error send back blank + &error('Never found end tag for <'.$tag. + '> current string 
'.
+		   &HTML::Entities::encode($result,'<>&"').
+		   '
'); + if ($gotfullstack) { + my $newstring=''.$result; + &Apache::lonxml::newparser($pars,\$newstring); + } + $result=''; + } + } else { + while ($#$pars > -1) { + while ($token = $$pars[-1]->get_token) { + #&Apache::lonxml::debug("s token:$token->[0]:$depth:$token->[1]"); + if (($token->[0] eq 'T')||($token->[0] eq 'C')|| + ($token->[0] eq 'D')) { + $result.=$token->[1]; + } elsif ($token->[0] eq 'PI') { + $result.=$token->[2]; + } elsif ($token->[0] eq 'S') { + if ( $token->[1] =~ /^\Q$tag\E$/i) { + $$pars[-1]->unget_token($token); last; + } else { + $result.=$token->[4]; + } + if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/) { $Apache::lonxml::usestyle=1; } + if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/) { $Apache::lonxml::usestyle=0; } + } elsif ($token->[0] eq 'E') { + $result.=$token->[2]; + } + } + if (($#$pars > 0) ) { + pop(@$pars); + pop(@Apache::lonxml::pwd); + } else { last; } + } + } + #&Apache::lonxml::debug("Exit:$result:"); + return $result +} + +sub newparser { + my ($parser,$contentref,$dir) = @_; + push (@$parser,HTML::LCParser->new($contentref)); + $$parser['-1']->xml_mode('1'); + if ( $dir eq '' ) { + push (@Apache::lonxml::pwd, $Apache::lonxml::pwd[$#Apache::lonxml::pwd]); + } else { + push (@Apache::lonxml::pwd, $dir); + } +} + +sub parstring { + my ($token) = @_; + my $temp=''; + foreach (@{$token->[3]}) { + unless ($_=~/\W/) { + my $val=$token->[2]->{$_}; + $val =~ s/([\%\@\\\"\'])/\\$1/g; + $val =~ s/(\$[^{a-zA-Z_])/\\$1/g; + $val =~ s/(\$)$/\\$1/; + #if ($val =~ m/^[\%\@]/) { $val="\\".$val; } + $temp .= "my \$$_=\"$val\";"; + } + } + return $temp; +} + +sub writeallows { + unless ($#extlinks>=0) { return; } + my $thisurl='/res/'.&Apache::lonnet::declutter(shift); + if ($ENV{'httpref.'.$thisurl}) { + $thisurl=$ENV{'httpref.'.$thisurl}; + } + my $thisdir=$thisurl; + $thisdir=~s/\/[^\/]+$//; + my %httpref=(); + foreach (@extlinks) { + $httpref{'httpref.'. + &Apache::lonnet::hreflocation($thisdir,$_)}=$thisurl; + } + @extlinks=(); + &Apache::lonnet::appenv(%httpref); +} + +sub register_ssi { + my ($url,%form)=@_; + push (@Apache::lonxml::ssi_info,{'url'=>$url,'form'=>\%form}); + return ''; +} + +sub do_registered_ssi { + foreach my $info (@Apache::lonxml::ssi_info) { + my %form=%{ $info->{'form'}}; + my $url=$info->{'url'}; + &Apache::lonnet::ssi($url,%form); + } +} +# +# Afterburner handles anchors, highlights and links +# +sub afterburn { + my $result=shift; + &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'}, + ['highlight','anchor','link']); + if ($ENV{'form.highlight'}) { + foreach (split(/\,/,$ENV{'form.highlight'})) { + my $anchorname=$_; + my $matchthis=$anchorname; + $matchthis=~s/\_+/\\s\+/g; + $result=~s/(\Q$matchthis\E)/\$1\<\/font\>/gs; + } + } + if ($ENV{'form.link'}) { + foreach (split(/\,/,$ENV{'form.link'})) { + my ($anchorname,$linkurl)=split(/\>/,$_); + my $matchthis=$anchorname; + $matchthis=~s/\_+/\\s\+/g; + $result=~s/(\Q$matchthis\E)/\$1\<\/a\>/gs; + } + } + if ($ENV{'form.anchor'}) { + my $anchorname=$ENV{'form.anchor'}; + my $matchthis=$anchorname; + $matchthis=~s/\_+/\\s\+/g; + $result=~s/(\Q$matchthis\E)/\$1\<\/a\>/s; + $result.=(<<"ENDSCRIPT"); + +ENDSCRIPT + } + return $result; +} + +sub storefile { + my ($file,$contents)=@_; + &Apache::lonnet::correct_line_ends(\$contents); + if (my $fh=Apache::File->new('>'.$file)) { + print $fh $contents; + $fh->close(); + return 1; + } else { + &warning("Unable to save file $file"); + return 0; + } +} + +sub createnewhtml { + my $title=&mt('Title of document goes here'); + my $body=&mt('Body of document goes here'); + my $filecontents=(< + + +$title + + +$body + + +SIMPLECONTENT + return $filecontents; +} + +sub createnewsty { + my $filecontents=(< + + + + + +SIMPLECONTENT + return $filecontents; +} + + +sub inserteditinfo { + my ($result,$filecontents,$filetype)=@_; + $filecontents = &HTML::Entities::encode($filecontents,'<>&"'); +# my $editheader='Edit below
'; + my $xml_help = ''; + my $initialize=''; + if ($filetype eq 'html') { + my $addbuttons=&Apache::lonhtmlcommon::htmlareaaddbuttons(); + $initialize=&Apache::lonhtmlcommon::htmlareaheaders(). + &Apache::lonhtmlcommon::spellheader(); + if (!&Apache::lonhtmlcommon::htmlareablocked() && + &Apache::lonhtmlcommon::htmlareabrowser()) { + $initialize.=(< +$addbuttons + + HTMLArea.loadPlugin("FullPage"); + + function initDocument() { + var editor=new HTMLArea("filecont",config); + editor.registerPlugin(FullPage); + editor.generate(); + } + +FULLPAGE + } else { + $initialize.=(< +$addbuttons + function initDocument() { + } + +FULLPAGE + } + $result=~s/\]*)\>/\/i; + $xml_help=&Apache::loncommon::helpLatexCheatsheet(); + } + my $cleanbut = ''; + if ($filetype eq 'html') { + $cleanbut=''; + } + my $titledisplay=&display_title(); + my %lt=&Apache::lonlocal::texthash('st' => 'Save this', + 'vi' => 'View', + 'ed' => 'Edit'); + my $buttons=(< + +BUTTONS + $buttons.=&Apache::lonhtmlcommon::spelllink('xmledit','filecont'); + $buttons.=&Apache::lonhtmlcommon::htmlareaselectactive('filecont'); + my $editfooter=(< + +
+$xml_help + +$buttons
+ +
$buttons +
+
+$titledisplay + +ENDFOOTER +# $result=~s/(\]*\>)/$1$editheader/is; + $result=~s/(\<\/body\>)/$editfooter/is; + return $result; +} + +sub get_target { + my $viewgrades=&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'}); + if ( $ENV{'request.state'} eq 'published') { + if ( defined($ENV{'form.grade_target'}) + && ($viewgrades == 'F' )) { + return ($ENV{'form.grade_target'}); + } elsif (defined($ENV{'form.grade_target'})) { + if (($ENV{'form.grade_target'} eq 'web') || + ($ENV{'form.grade_target'} eq 'tex') ) { + return $ENV{'form.grade_target'} + } else { + return 'web'; + } + } else { + return 'web'; + } + } elsif ($ENV{'request.state'} eq 'construct') { + if ( defined($ENV{'form.grade_target'})) { + return ($ENV{'form.grade_target'}); + } else { + return 'web'; + } + } else { + return 'web'; + } +} + +sub handler { + my $request=shift; + + my $target=&get_target(); + + $Apache::lonxml::debug=$ENV{'user.debug'}; + + if ($ENV{'browser.mathml'}) { + &Apache::loncommon::content_type($request,'text/xml'); + } else { + &Apache::loncommon::content_type($request,'text/html'); + } + &Apache::loncommon::no_cache($request); + $request->send_http_header; + + return OK if $request->header_only; + + + my $file=&Apache::lonnet::filelocation("",$request->uri); + my $filetype; + if ($file =~ /\.sty$/) { + $filetype='sty'; + } else { + $filetype='html'; + } +# +# Edit action? Save file. +# + unless ($ENV{'request.state'} eq 'published') { + if (($ENV{'form.savethisfile'}) || ($ENV{'form.attemptclean'})) { + if (&storefile($file,$ENV{'form.filecont'})) { + &Apache::lonxml::info("". + &mt('Updated').": ". + &Apache::lonlocal::locallocaltime(time). + " "); + } + } + } + my %mystyle; + my $result = ''; + my $filecontents=&Apache::lonnet::getfile($file); + if ($filecontents eq -1) { + my $bodytag=&Apache::loncommon::bodytag('File Error'); + my $fnf=&mt('File not found'); + $result=(< + +$fnf + +$bodytag +$fnf: $file + + +ENDNOTFOUND + $filecontents=''; + if ($ENV{'request.state'} ne 'published') { + if ($filetype eq 'sty') { + $filecontents=&createnewsty(); + } else { + $filecontents=&createnewhtml(); + } + $ENV{'form.editmode'}='Edit'; #force edit mode + } + } else { + unless ($ENV{'request.state'} eq 'published') { + if ($filecontents=~/BEGIN LON-CAPA Internal/) { + &Apache::lonxml::error(&mt('This file appears to be a rendering of a Lon-CAPA resource. If this is correct, this resource will act very oddly and incorrectly.')); + } + + if ($ENV{'form.attemptclean'}) { + $filecontents=&htmlclean($filecontents,1); + } +# +# we are in construction space, see if edit mode forced + &Apache::loncommon::get_unprocessed_cgi + ($ENV{'QUERY_STRING'},['editmode']); + } + if (!$ENV{'form.editmode'} || $ENV{'form.viewmode'}) { + $result = &Apache::lonxml::xmlparse($request,$target,$filecontents, + '',%mystyle); + } + } + +# +# Edit action? Insert editing commands +# + unless ($ENV{'request.state'} eq 'published') { + if ($ENV{'form.editmode'} && (!($ENV{'form.viewmode'}))) { + my $displayfile=$request->uri; + $displayfile=~s/^\/[^\/]*//; + $result=''. + &Apache::lonxml::message_location().'

'. + $displayfile. + '

'; + $result=&inserteditinfo($result,$filecontents,$filetype); + } + } + if ($filetype eq 'html') { writeallows($request->uri); } + + + &Apache::lonxml::add_messages(\$result); + $request->print($result); + + return OK; +} + +sub display_title { + my $result; + if ($ENV{'request.state'} eq 'construct') { + my $title=&Apache::lonnet::gettitle(); + if (!defined($title) || $title eq '') { + $title = $ENV{'request.filename'}; + $title = substr($title, rindex($title, '/') + 1); + } + $result = ""; + } + return $result; +} + +sub debug { + if ($Apache::lonxml::debug eq "1") { + $|=1; + my $request=$Apache::lonxml::request; + if (!$request) { $request=Apache->request; } + $request->print('
DEBUG:'.&HTML::Entities::encode($_[0],'<>&"')."
\n"); + #&Apache::lonnet::logthis($_[0]); + } +} + +sub error { + $errorcount++; + if (($Apache::lonxml::debug eq 1) || ($ENV{'request.state'} eq 'construct') ) { + # If printing in construction space, put the error inside 

+	push(@Apache::lonxml::error_messages,
+	     $Apache::lonxml::warnings_error_header.
+	     "ERROR:".join("
\n",@_)."
\n");
+	$Apache::lonxml::warnings_error_header='';
+    } else {
+	my $errormsg;
+	my ($symb)=&Apache::lonnet::symbread();
+	if ( !$symb ) {
+	    #public or browsers
+	    $errormsg=&mt("An error occured while processing this resource. The author has been notified.");
+	} 
+	#notify author
+	&Apache::lonmsg::author_res_msg($ENV{'request.filename'},join('
',@_));
+	#notify course
+	if ( $symb && $ENV{'request.course.id'} ) {
+	    my (undef,%users)=&Apache::lonfeedback::decide_receiver(undef,0,1,1,1);
+	    my $declutter=&Apache::lonnet::declutter($ENV{'request.filename'});
+	    my @userlist;
+	    foreach (keys %users) {
+		my ($user,$domain) = split(/:/, $_);
+		push(@userlist,"$user\@$domain");
+		&Apache::lonmsg::user_normal_msg($user,$domain,
+						 "Error [$declutter]",join('
',@_));
+	    }
+	    if ($ENV{'request.role.adv'}) {
+		$errormsg=&mt("An error occured while processing this resource. The course personnel ([_1]) and the author have been notified.",join(', ',@userlist));
+	    } else {
+		$errormsg=&mt("An error occured while processing this resource. The instructor has been notified.");
+	    }
+	}
+	push(@Apache::lonxml::error_messages,"$errormsg 
");
+    }
+}
+
+sub warning {
+    $warningcount++;
+  
+    if ($ENV{'form.grade_target'} ne 'tex') {
+	if ($ENV{'request.state'} eq 'construct' || $Apache::lonxml::debug) {
+	    my $request=$Apache::lonxml::request;
+	    if (!$request) { $request=Apache->request; }
+	    push(@Apache::lonxml::warning_messages,
+		 $Apache::lonxml::warnings_error_header.
+		 "WARNING:".join('
',@_)."
\n");
+	    $Apache::lonxml::warnings_error_header='';
+	}
+    }
+}
+
+sub info {
+    if ($ENV{'form.grade_target'} ne 'tex' 
+	&& $ENV{'request.state'} eq 'construct') {
+	push(@Apache::lonxml::info_messages,join('
',@_)."
\n");
+    }
+}
+
+sub message_location {
+    return '__LONCAPA_INTERNAL_MESSAGE_LOCATION__';
+}
+
+sub add_messages {
+    my ($msg)=@_;
+    my $result=join(' ',
+		    @Apache::lonxml::info_messages,
+		    @Apache::lonxml::error_messages,
+		    @Apache::lonxml::warning_messages);
+    undef(@Apache::lonxml::info_messages);
+    undef(@Apache::lonxml::error_messages);
+    undef(@Apache::lonxml::warning_messages);
+    $$msg=~s/__LONCAPA_INTERNAL_MESSAGE_LOCATION__/$result/;
+    $$msg=~s/__LONCAPA_INTERNAL_MESSAGE_LOCATION__//g;
+}
+
+sub get_param {
+    my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
+    if ( ! $context ) { $context = -1; }
+    my $args ='';
+    if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
+    if ( ! $Apache::lonxml::usestyle ) {
+	$args=$Apache::lonxml::style_values.$args;
+    }
+    if ( ! $args ) { return undef; }
+    if ( $case_insensitive ) {
+	if ($args =~ s/(my \$)(\Q$param\E)(=\")/$1.lc($2).$3/ei) {
+	    return &Apache::run::run("{$args;".'return $'.$param.'}',
+                                     $safeeval); #'
+	} else {
+	    return undef;
+	}
+    } else {
+	if ( $args =~ /my \$\Q$param\E=\"/ ) {
+	    return &Apache::run::run("{$args;".'return $'.$param.'}',
+                                     $safeeval); #'
+	} else {
+	    return undef;
+	}
+    }
+}
+
+sub get_param_var {
+  my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
+  if ( ! $context ) { $context = -1; }
+  my $args ='';
+  if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
+  if ( ! $Apache::lonxml::usestyle ) {
+      $args=$Apache::lonxml::style_values.$args;
+  }
+  &Apache::lonxml::debug("Args are $args param is $param");
+  if ($case_insensitive) {
+      if (! ($args=~s/(my \$)(\Q$param\E)(=\")/$1.lc($2).$3/ei)) {
+	  return undef;
+      }
+  } elsif ( $args !~ /my \$\Q$param\E=\"/ ) { return undef; }
+  my $value=&Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
+  &Apache::lonxml::debug("first run is $value");
+  if ($value =~ /^[\$\@\%][a-zA-Z_]\w*$/) {
+      &Apache::lonxml::debug("doing second");
+      my @result=&Apache::run::run("return $value",$safeeval,1);
+      if (!defined($result[0])) {
+	  return $value
+      } else {
+	  if (wantarray) { return @result; } else { return $result[0]; }
+      }
+  } else {
+    return $value;
+  }
+}
+
+sub register_insert {
+  my @data = split /\n/, &Apache::lonnet::getfile('/home/httpd/lonTabs/insertlist.tab');
+  my $i;
+  my $tagnum=0;
+  my @order;
+  for ($i=0;$i < $#data; $i++) {
+    my $line = $data[$i];
+    if ( $line =~ /^\#/ || $line =~ /^\s*\n/) { next; }
+    if ( $line =~ /TABLE/ ) { last; }
+    my ($tag,$descrip,$color,$function,$show,$helpfile,$helpdesc) = split(/,/, $line);
+    if ($tag) {
+      $insertlist{"$tagnum.tag"} = $tag;
+      $insertlist{"$tagnum.description"} = $descrip;
+      $insertlist{"$tagnum.color"} = $color;
+      $insertlist{"$tagnum.function"} = $function;
+      if (!defined($show)) { $show='yes'; }
+      $insertlist{"$tagnum.show"}= $show;
+      $insertlist{"$tagnum.helpfile"} = $helpfile;
+      $insertlist{"$tagnum.helpdesc"} = $helpdesc;
+      $insertlist{"$tag.num"}=$tagnum;
+      $tagnum++;
+    }
+  }
+  $i++; #skipping TABLE line
+  $tagnum = 0;
+  for (;$i < $#data;$i++) {
+    my $line = $data[$i];
+    my ($mnemonic,@which) = split(/ +/,$line);
+    my $tag = $insertlist{"$tagnum.tag"};
+    for (my $j=0;$j <=$#which;$j++) {
+      if ( $which[$j] eq 'Y' ) {
+	if ($insertlist{"$j.show"} ne 'no') {
+	  push(@{ $insertlist{"$tag.which"} },$j);
+	}
+      }
+    }
+    $tagnum++;
+  }
+}
+
+sub description {
+  my ($token)=@_;
+  my $tagnum;
+  my $tag=$token->[1];
+  foreach my $namespace (reverse @Apache::lonxml::namespace) {
+    my $testtag=$namespace.'::'.$tag;
+    $tagnum=$insertlist{"$testtag.num"};
+    if (defined($tagnum)) { last; }
+  }
+  if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; }
+  return $insertlist{$tagnum.'.description'};
+}
+
+# Returns a list containing the help file, and the description
+sub helpinfo {
+  my ($token)=@_;
+  my $tagnum;
+  my $tag=$token->[1];
+  foreach my $namespace (reverse @Apache::lonxml::namespace) {
+    my $testtag=$namespace.'::'.$tag;
+    $tagnum=$insertlist{"$testtag.num"};
+    if (defined($tagnum)) { last; }
+  }
+  if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; }
+  return ($insertlist{$tagnum.'.helpfile'}, $insertlist{$tagnum.'.helpdesc'});
+}
+
+# ----------------------------------------------------------------- whichuser
+# returns a list of $symb, $courseid, $domain, $name that is correct for
+# calls to lonnet functions for this setup.
+# - looks for form.grade_ parameters
+sub whichuser {
+  my ($passedsymb)=@_;
+  my ($symb,$courseid,$domain,$name,$publicuser);
+  if (defined($ENV{'form.grade_symb'})) {
+    my $tmp_courseid=$ENV{'form.grade_courseid'};
+    my $allowed=&Apache::lonnet::allowed('vgr',$tmp_courseid);
+    if (!$allowed && 
+	exists($ENV{'request.course.sec'}) && 
+	$ENV{'request.course.sec'} !~ /^\s*$/) {
+	$allowed=&Apache::lonnet::allowed('vgr',$ENV{'form.grade_courseid'}.
+					  '/'.$ENV{'request.course.sec'});
+    }
+    if ($allowed) {
+      $symb=$ENV{'form.grade_symb'};
+      $courseid=$ENV{'form.grade_courseid'};
+      $domain=$ENV{'form.grade_domain'};
+      $name=$ENV{'form.grade_username'};
+    }
+  } else {
+      if (!$passedsymb) {
+          $symb=&Apache::lonnet::symbread();
+      } else {
+          $symb=$passedsymb;
+      }
+      $courseid=$ENV{'request.course.id'};
+      $domain=$ENV{'user.domain'};
+      $name=$ENV{'user.name'};
+      if ($name eq 'public' && $domain eq 'public') {
+	  if (!defined($ENV{'form.username'})) {
+	      $ENV{'form.username'}.=time.rand(10000000);
+	  }
+	  $name.=$ENV{'form.username'};
+      }
+  }
+  return ($symb,$courseid,$domain,$name,$publicuser);
+}
+
 1;
 __END__
+
+