--- loncom/xml/lonxml.pm 2000/06/27 20:33:54 1.5 +++ loncom/xml/lonxml.pm 2001/06/09 14:23:27 1.90 @@ -2,193 +2,861 @@ # XML Parser Module # # last modified 06/26/00 by Alexander Sakharuk +# 11/6 Gerd Kortemeyer +# 6/1/1 Gerd Kortemeyer +# 2/21,3/13 Guy +# 3/29,5/4 Gerd Kortemeyer +# 5/10 Scott Harrison +# 5/26 Gerd Kortemeyer +# 5/27 H. K. Ng +# 6/2,6/3,6/8,6/9 Gerd Kortemeyer package Apache::lonxml; - +use vars +qw(@pwd @outputstack $redirection $import @extlinks $metamode $evaluate %insertlist @namespace); use strict; use HTML::TokeParser; use Safe; -use Apache::style; +use Safe::Hole; +use Math::Cephes qw(:trigs :hypers :bessels erf erfc); +use Opcode; + +sub register { + my $space; + my @taglist; + my $temptag; + ($space,@taglist) = @_; + foreach $temptag (@taglist) { + $Apache::lonxml::alltags{$temptag}=$space; + } +} + +use Apache::Constants qw(:common); use Apache::lontexconvert; +use Apache::style; +use Apache::run; use Apache::londefdef; +use Apache::scripttag; +use Apache::edit; +use Apache::lonnet; +use Apache::File; + #================================================== Main subroutine: xmlparse +#debugging control, to turn on debugging modify the correct handler +$Apache::lonxml::debug=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=(); + +sub xmlbegin { + my $output=''; + if ($ENV{'browser.mathml'}) { + $output='' + .'' + .']>' + .''; + } else { + $output=''; + } + return $output; +} + +sub xmlend { + return ''; +} + +sub fontsettings() { + my $headerstring=''; + if (($ENV{'browser.os'} eq 'mac') && (!$ENV{'browser.mathml'})) { + $headerstring.= + ''; + } + return $headerstring; +} + +sub registerurl { + if ($ENV{'REQUEST_URI'}!~/^\/(res\/)*adm\//) { + my $hwkadd=''; + if ($ENV{'REQUEST_URI'}=~/\.(problem|exam|quiz|assess|survey|form)$/) { + if (&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'})) { + $hwkadd.=(< +// BEGIN LON-CAPA Internal + + function LONCAPAreg() { + menu=window.open("","LONCAPAmenu"); + menu.clearTimeout(menu.menucltim); + menu.currentURL=window.location.pathname; + menu.currentStale=0; + menu.clearbut(3,1); + menu.switchbutton + (8,1,'eval.gif','evaluate','this','gopost("/adm/evaluate",currentURL)'); + menu.switchbutton + (8,2,'fdbk.gif','feedback','on this','gopost("/adm/feedback",currentURL)'); + menu.switchbutton + (8,3,'prt.gif','prepare','printout','gopost("/adm/printout",currentURL)'); + menu.switchbutton + (2,1,'back.gif','backward','','gopost("/adm/flip","back:"+currentURL)'); + menu.switchbutton + (2,3,'forw.gif','forward','','gopost("/adm/flip","forward:"+currentURL)'); + $hwkadd + } + + function LONCAPAstale() { + menu=window.open("","LONCAPAmenu"); + menu.currentStale=1; + menu.switchbutton + (3,1,'reload.gif','return','location','go(currentURL)'); + menu.clearbut(7,1); + menu.clearbut(7,2); + menu.clearbut(7,3); + menu.menucltim=menu.setTimeout( + 'clearbut(2,1);clearbut(2,3);clearbut(8,1);clearbut(8,2);clearbut(8,3);', + 2000); + + } + +// END LON-CAPA Internal + +ENDREGTHIS + + } else { + return (< +// BEGIN LON-CAPA Internal + + function LONCAPAreg() { + menu=window.open("","LONCAPAmenu"); + menu.currentStale=1; + menu.clearbut(2,1); + menu.clearbut(2,3); + menu.clearbut(8,1); + menu.clearbut(8,2); + menu.clearbut(8,3); + if (menu.currentURL) { + menu.switchbutton + (3,1,'reload.gif','return','location','go(currentURL)'); + } else { + menu.clearbut(3,1); + } + } + + function LONCAPAstale() { + } + +// END LON-CAPA Internal + +ENDDONOTREGTHIS + + } +} + +sub loadevents() { + return 'LONCAPAreg();'; +} + +sub unloadevents() { + return 'LONCAPAstale();'; +} + +sub printalltags { + my $temp; + foreach $temp (sort keys %Apache::lonxml::alltags) { + &Apache::lonxml::debug("$temp -- $Apache::lonxml::alltags{$temp}"); + } +} sub xmlparse { - my ($target,$content_file_string,%style_for_target) = @_; - my $pars = HTML::TokeParser->new(\$content_file_string); + my ($target,$content_file_string,$safeinit,%style_for_target) = @_; + if ($target eq 'meta') { + $Apache::lonxml::redirection = 0; + $Apache::lonxml::metamode = 1; + $Apache::lonxml::evaluate = 1; + $Apache::lonxml::import = 0; + } elsif ($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; + } else { + $Apache::lonxml::redirection = 0; + $Apache::lonxml::metamode = 0; + $Apache::lonxml::evaluate = 1; + $Apache::lonxml::import = 1; + } + #&printalltags(); + my @pars = (); + @Apache::lonxml::pwd=(); + my $pwd=$ENV{'request.filename'}; + $pwd =~ s:/[^/]*$::; + &newparser(\@pars,\$content_file_string,$pwd); my $currentstring = ''; my $finaloutput = ''; my $newarg = ''; - my $tempostring = ''; - my $tempocont = ''; - my $safeeval = new Safe; + my $result; + my $safeeval = new Safe; + 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 @parstack = (); - -#------------------------------------- Parse input string (content_file_string) - + &initdepth; 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]}) { - -#---------------------------------------------------- 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') { - $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 .= $tokenpat->[2]; - } - } - - map {$partstring =~ s/\$$_/$token->[2]->{$_}/g; } @{$token->[3]}; - - &run($partstring,$safeeval); - - $partstring = ''; - } elsif ($tokenpat->[1] eq 'evaluate') { - $outputstring = &evaluate($tokenpat->[2]{expression},$safeeval); - $oustring .= $outputstring; - } else { - $oustring .= $tokenpat->[4]; - } - } elsif ($tokenpat->[0] eq 'E' and $tokenpat->[1] ne 'evaluate') { - $oustring .= $tokenpat->[1]; - } + while ( $#pars > -1 ) { + while ($token = $pars[$#pars]->get_token) { + if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) { + if ($metamode<1) { $result=$token->[1]; } + } elsif ($token->[0] eq 'PI') { + if ($metamode<1) { $result=$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 (exists $style_for_target{$token->[1]}) { + if ($Apache::lonxml::redirection) { + $Apache::lonxml::outputstack['-1'] .= + &recurse($style_for_target{$token->[1]},$target,$safeeval, + \%style_for_target,@parstack); + } else { + $finaloutput .= &recurse($style_for_target{$token->[1]},$target, + $safeeval,\%style_for_target,@parstack); } - $newarg = $oustring; } else { - map {$newarg =~ s/\$$_/$token->[2]->{$_}/g; } @{$token->[3]}; + $result = &callsub("start_$token->[1]", $target, $token, \@stack, + \@parstack, \@pars, $safeeval, \%style_for_target); + } + } elsif ($token->[0] eq 'E') { + #clear out any tags that didn't end + while ($token->[1] ne $stack[$#stack] && ($#stack > -1)) { + &Apache::lonxml::warning("Unbalanced tags in resource $stack['-1']"); + pop @stack;pop @parstack;&decreasedepth($token); } - $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 = ''; + + if (exists $style_for_target{'/'."$token->[1]"}) { + if ($Apache::lonxml::redirection) { + $Apache::lonxml::outputstack['-1'] .= + &recurse($style_for_target{'/'."$token->[1]"}, + $target,$safeeval,\%style_for_target,@parstack); } else { - $finaloutput .= $token->[4]; + $finaloutput .= &recurse($style_for_target{'/'."$token->[1]"}, + $target,$safeeval,\%style_for_target, + @parstack); } - use strict 'refs'; + + } else { + $result = &callsub("end_$token->[1]", $target, $token, \@stack, + \@parstack, \@pars,$safeeval, \%style_for_target); } - } - } 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; - $currentstring = ''; + } else { + &Apache::lonxml::error("Unknown token event :$token->[0]:$token->[1]:"); + } + #evaluate variable refs in result + if ($result ne "") { + if ( $#parstack > -1 ) { + if ($Apache::lonxml::redirection) { + $Apache::lonxml::outputstack['-1'] .= + &Apache::run::evaluate($result,$safeeval,$parstack[$#parstack]); } else { - $finaloutput .= $token->[4]; + $finaloutput .= &Apache::run::evaluate($result,$safeeval, + $parstack[$#parstack]); } - use strict 'refs'; + } else { + $finaloutput .= &Apache::run::evaluate($result,$safeeval,''); } + $result = ''; + } + if ($token->[0] eq 'E') { + pop @stack;pop @parstack;&decreasedepth($token); } - #---- 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; - - &run($partstring,$safeeval); - - $partstring = ''; - } elsif ($tokenpat->[1] eq 'evaluate') { - $outputstring = &evaluate($tokenpat->[2]{expression},$safeeval); - $oustring .= $outputstring; - } else { - $oustring .= $tokenpat->[4]; - } - } elsif ($tokenpat->[0] eq 'E' and $tokenpat->[1] ne 'evaluate') { - $oustring .= $tokenpat->[1]; - } - } - $newarg = $oustring; + } + pop @pars; + pop @Apache::lonxml::pwd; + } + +# if ($target eq 'meta') { +# $finaloutput.=&endredirection; +# } + + if (($ENV{'QUERY_STRING'}) && ($target eq 'web')) { + $finaloutput=&afterburn($finaloutput); + } + + return $finaloutput; +} + + +sub recurse { + + my @innerstack = (); + my @innerparstack = (); + my ($newarg,$target,$safeeval,$style_for_target,@parstack) = @_; + my @pat = (); + &newparser(\@pat,\$newarg); + my $tokenpat; + my $partstring = ''; + my $output=''; + my $decls=''; + while ( $#pat > -1 ) { + while ($tokenpat = $pat[$#pat]->get_token) { + if (($tokenpat->[0] eq 'T') || ($tokenpat->[0] eq 'C') || ($tokenpat->[0] eq 'D') ) { + if ($metamode<1) { $partstring=$tokenpat->[1]; } + } elsif ($tokenpat->[0] eq 'PI') { + if ($metamode<1) { $partstring=$tokenpat->[2]; } + } elsif ($tokenpat->[0] eq 'S') { + push (@innerstack,$tokenpat->[1]); + push (@innerparstack,&parstring($tokenpat)); + &increasedepth($tokenpat); + $partstring = &callsub("start_$tokenpat->[1]", $target, $tokenpat, + \@innerstack, \@innerparstack, \@pat, + $safeeval, $style_for_target); + } elsif ($tokenpat->[0] eq 'E') { + #clear out any tags that didn't end + while ($tokenpat->[1] ne $innerstack[$#innerstack] + && ($#innerstack > -1)) { + &Apache::lonxml::warning("Unbalanced tags in resource $innerstack['-1']"); + pop @innerstack;pop @innerparstack;&decreasedepth($tokenpat); + } + $partstring = &callsub("end_$tokenpat->[1]", $target, $tokenpat, + \@innerstack, \@innerparstack, \@pat, + $safeeval, $style_for_target); + } else { + &Apache::lonxml::error("Unknown token event :$tokenpat->[0]:$tokenpat->[1]:"); + } + #pass both the variable to the style tag, and the tag we + #are processing inside the + if ( $partstring ne "" ) { + if ( $#parstack > -1 ) { + if ( $#innerparstack > -1 ) { + $decls= $parstack[$#parstack].$innerparstack[$#innerparstack]; + } else { + $decls= $parstack[$#parstack]; + } + } else { + if ( $#innerparstack > -1 ) { + $decls=$innerparstack[$#innerparstack]; + } else { + $decls=''; + } + } + $output .= &Apache::run::evaluate($partstring,$safeeval,$decls); + $partstring = ''; + } + if ($tokenpat->[0] eq 'E') { pop @innerstack;pop @innerparstack; + &decreasedepth($tokenpat);} + } + pop @pat; + pop @Apache::lonxml::pwd; + } + return $output; +} + +sub callsub { + my ($sub,$target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; + my $currentstring=''; + my $nodefault; + { + my $sub1; + no strict 'refs'; + if ($target eq 'edit' && $token->[0] eq 'S') { + $currentstring = &Apache::edit::tag_start($target,$token,$tagstack, + $parstack,$parser, + $safeeval,$style); + } + my $tag=$token->[1]; + my $space=$Apache::lonxml::alltags{$tag}; + if (!$space) { + $tag=~tr/A-Z/a-z/; + $sub=~tr/A-Z/a-z/; + $space=$Apache::lonxml::alltags{$tag} + } + if ($space) { + #&Apache::lonxml::debug("Calling sub $sub in $space $metamode
\n"); + $sub1="$space\:\:$sub"; + $Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter); + ($currentstring,$nodefault) = &$sub1($target,$token,$tagstack, + $parstack,$parser,$safeeval, + $style); + } else { + #&Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode
\n"); + if ($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(); + } else { + $currentstring = $token->[2]; + } + } + } + use strict 'refs'; + } + return $currentstring; +} + +sub init_safespace { + my ($target,$safeeval,$safehole,$safeinit) = @_; + $safeeval->permit("entereval"); + $safeeval->permit(":base_math"); + $safeeval->permit("sort"); + $safeeval->deny(":base_io"); + $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT'); + + $safehole->wrap(\&Math::Cephes::asin,$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'); + +#need to inspect this class of ops +# $safeeval->deny(":base_orig"); + $safeinit .= ';$external::target='.$target.';'; + $safeinit .= ';$external::randomseed='.&Apache::lonnet::rndseed().';'; + &Apache::run::run($safeinit,$safeeval); +} + +sub startredirection { + $Apache::lonxml::redirection++; + push (@Apache::lonxml::outputstack, ''); +} + +sub endredirection { + if (!$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--; + pop @Apache::lonxml::outputstack; +} + +sub initdepth { + @Apache::lonxml::depthcounter=(); + $Apache::lonxml::depth=-1; + $Apache::lonxml::olddepth=-1; +} + +sub increasedepth { + my ($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 $curdepth=join('_',@Apache::lonxml::depthcounter); + &Apache::lonxml::debug("s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\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("Unbalanced tags in resource"); + $Apache::lonxml::depth='-1'; + } + my $curdepth=join('_',@Apache::lonxml::depthcounter); + &Apache::lonxml::debug("e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n"); +#print "
e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n"; +} + +sub get_all_text { + + my($tag,$pars)= @_; + my $depth=0; + my $token; + my $result=''; + if ( $tag =~ m:^/: ) { + my $tag=substr($tag,1); +# &Apache::lonxml::debug("have:$tag:"); + while (($depth >=0) && ($token = $pars->get_token)) { +# &Apache::lonxml::debug("e token:$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] eq $tag) { $depth++; } + $result.=$token->[4]; + } elsif ($token->[0] eq 'E') { + if ( $token->[1] eq $tag) { $depth--; } + #skip sending back the last end tag + if ($depth > -1) { $result.=$token->[2]; } else { + $pars->unget_token($token); + } + } + } + } else { + while ($token = $pars->get_token) { +# &Apache::lonxml::debug("s token:$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] eq $tag) { + $pars->unget_token($token); last; } else { - my @very_temp = split(',',$parstack[$#parstack]); - map {my @ret= split('=',$_); $newarg =~ s/\$$ret[0]/$ret[1]/g; } @very_temp; + $result.=$token->[4]; } - - $finaloutput .= $newarg; + } elsif ($token->[0] eq 'E') { + $result.=$token->[2]; } - pop @parstack; } } - return $finaloutput; +# &Apache::lonxml::debug("Exit:$result:"); + return $result +} + +sub newparser { + my ($parser,$contentref,$dir) = @_; + push (@$parser,HTML::TokeParser->new($contentref)); + $$parser['-1']->xml_mode('1'); + if ( $dir eq '' ) { + push (@Apache::lonxml::pwd, $Apache::lonxml::pwd[$#Apache::lonxml::pwd]); + } else { + push (@Apache::lonxml::pwd, $dir); + } +# &Apache::lonxml::debug("pwd:$#Apache::lonxml::pwd"); +# &Apache::lonxml::debug("pwd:$Apache::lonxml::pwd[$#Apache::lonxml::pwd]"); +} + +sub parstring { + my ($token) = @_; + my $temp=''; + map { + unless ($_=~/\W/) { + my $val=$token->[2]->{$_}; + $val =~ s/([\%\@\\])/\\$1/g; + #if ($val =~ m/^[\%\@]/) { $val="\\".$val; } + $temp .= "my \$$_=\"$val\";" + } + } @{$token->[3]}; + return $temp; +} + +sub writeallows { + my $thisurl='/res/'.&Apache::lonnet::declutter(shift); + my $thisdir=$thisurl; + $thisdir=~s/\/[^\/]+$//; + my %httpref=(); + map { + $httpref{'httpref.'. + &Apache::lonnet::hreflocation($thisdir,$_)}=$thisurl; } @extlinks; + &Apache::lonnet::appenv(%httpref); +} + +# +# Afterburner handles anchors, highlights and links +# +sub afterburn { + my $result=shift; + map { + my ($name, $value) = split(/=/,$_); + $value =~ tr/+/ /; + $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg; + if (($name eq 'highlight')||($name eq 'anchor')||($name eq 'link')) { + unless ($ENV{'form.'.$name}) { + $ENV{'form.'.$name}=$value; + } + } + } (split(/&/,$ENV{'QUERY_STRING'})); + if ($ENV{'form.highlight'}) { + map { + my $anchorname=$_; + my $matchthis=$anchorname; + $matchthis=~s/\_+/\\s\+/g; + $result=~s/($matchthis)/\$1\<\/font\>/gs; + } split(/\,/,$ENV{'form.highlight'}); + } + if ($ENV{'form.link'}) { + map { + my ($anchorname,$linkurl)=split(/\>/,$_); + my $matchthis=$anchorname; + $matchthis=~s/\_+/\\s\+/g; + $result=~s/($matchthis)/\$1\<\/a\>/gs; + } split(/\,/,$ENV{'form.link'}); + } + if ($ENV{'form.anchor'}) { + my $anchorname=$ENV{'form.anchor'}; + my $matchthis=$anchorname; + $matchthis=~s/\_+/\\s\+/g; + $result=~s/($matchthis)/\$1\<\/a\>/s; + $result.=(<<"ENDSCRIPT"); + +ENDSCRIPT + } + return $result; } +sub storefile { + my ($file,$contents)=@_; + if (my $fh=Apache::File->new('>'.$file)) { + print $fh $contents; + $fh->close(); + } +} + +sub inserteditinfo { + my ($result,$filecontents)=@_; + unless ($filecontents) { + $filecontents=(< + + + Title of Document Goes Here + + + + + Body of Document Goes Here + + + +SIMPLECONTENT + } + my $editheader='Edit below
'; + my $editfooter=(< + +
+ +
+ +
+ENDFOOTER + $result=~s/(\]*\>)/$1$editheader/is; + $result=~s/(\<\/body\>)/$editfooter/is; + return $result; +} + +sub handler { + my $request=shift; + + my $target='web'; + + $Apache::lonxml::debug=0; + + if ($ENV{'browser.mathml'}) { + $request->content_type('text/xml'); + } else { + $request->content_type('text/html'); + } + + $request->send_http_header; + + return OK if $request->header_only; + + + my $file=&Apache::lonnet::filelocation("",$request->uri); +# +# Edit action? Save file. +# + unless ($ENV{'request.state'} eq 'published') { + if ($ENV{'form.savethisfile'}) { + &storefile($file,$ENV{'form.filecont'}); + } + } + my %mystyle; + my $result = ''; + my $filecontents=&Apache::lonnet::getfile($file); + if ($filecontents == -1) { + $result=(< + +File not found + + +File not found: $file + + +ENDNOTFOUND + $filecontents=''; + } else { + $result = &Apache::lonxml::xmlparse($target,$filecontents,'',%mystyle); + } + +# +# Edit action? Insert editing commands +# + unless ($ENV{'request.state'} eq 'published') { + $result=&inserteditinfo($result,$filecontents); + } + + $request->print($result); + + writeallows($request->uri); + return OK; +} + +sub debug { + if ($Apache::lonxml::debug eq 1) { + print "DEBUG:".$_[0]."
\n"; + } +} + +sub error { + if (($Apache::lonxml::debug eq 1) || ($ENV{'request.state'} eq 'construct') ) { + print "ERROR:".$_[0]."
\n"; + } else { + print "An Error occured while processing this resource. The instructor has been notified.
"; + #notify author + &Apache::lonmsg::author_res_msg($ENV{'request.filename'},$_[0]); + #notify course + if ( $ENV{'request.course.id'} ) { + my $users=$ENV{'course.'.$ENV{'request.course.id'}.'.comment.email'}; + foreach my $user (split /\,/, $users) { + ($user,my $domain) = split /:/, $user; + &Apache::lonmsg::user_normal_msg($user,$domain,"Error in $ENV{'request.filename'}",$_[0]); + } + } + + #FIXME probably shouldn't have me get everything forever. + &Apache::lonmsg::user_normal_msg('albertel','msu',"Error in $ENV{'request.filename'}",$_[0]); + #&Apache::lonmsg::user_normal_msg('albertel','103',"Error in $ENV{'request.filename'}",$_[0]); + } +} + +sub warning { + if ($ENV{'request.state'} eq 'construct') { + print "WARNING:".$_[0]."
\n"; + } +} + +sub get_param { + my ($param,$parstack,$safeeval,$context) = @_; + if ( ! $context ) { $context = -1; } + my $args =''; + if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; } + return &Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #' +} + +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,$descrip,$function,$show) = split(/,/, $line); + $insertlist{"$tagnum.tag"} = $tag; + $insertlist{"$tagnum.description"} = $descrip; + $insertlist{"$tagnum.function"} = $function; + $insertlist{"$tagnum.show"}= $show; + $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++; + } +} 1; __END__ + +