--- loncom/xml/lonxml.pm 2000/06/23 20:40:06 1.2
+++ loncom/xml/lonxml.pm 2000/06/29 20:27:13 1.8
@@ -1,149 +1,195 @@
# The LearningOnline Network with CAPA
-# Style Parser Module
+# XML Parser Module
#
-# last modified 06/23/00 by Alexander Sakharuk
+# last modified 06/26/00 by Alexander Sakharuk
-package Apache::lonstyleparser;
+package Apache::lonxml;
use strict;
use HTML::TokeParser;
+use Safe;
-#============================================================= style subroutine
-
-sub styleparser {
-
- my ($target,$content_style_string) = @_;
+sub register {
+ my $space;
+ my @taglist;
+ my $temptag;
+ ($space,@taglist) = @_;
+ foreach $temptag (@taglist) {
+ $Apache::lonxml::alltags{$temptag}=$space;
+ }
+}
-#------------------------------------------- target redefinition (if necessary)
-
- my @target_string = '';
- my $element;
-
- ($element,@target_string) = split ('&&',$target);
-
- map {$content_style_string =~ s/\<(.*)$_\>/\<$1$element\>/g; } @target_string;
-
- $target = $element;
-
-#-------------------------------------------- create a table for defined target
-#----------------------------------------- from the information from Style File
-
- my @value_style = ();
- my $current_key = '';
- my $current_value = '';
- my $stoken;
- my $flag;
- my $iele;
-
- my $pstyle = HTML::TokeParser->new(\$content_style_string);
-
- while ($stoken = $pstyle->get_token) {
-#----------------------------------------------------- start for tag definition
- if ($stoken->[0] eq 'S' and $stoken->[1] eq 'definetag') {
-#-------------------------------------------------------------- new key in hash
- $current_key = $stoken->[2]{name};
- $flag = 0;
-#-------------------------------------------------------------- metadata output
- if ($target eq 'meta') {
- while ($stoken = $pstyle->get_token and $stoken->[1] ne 'definetag') {
- if ($stoken->[0] eq 'S' and $stoken->[1] eq 'meta') {
- while ($stoken = $pstyle->get_token and $stoken->[1] ne 'meta') {
- $current_value .= $stoken->[1];
- }
+use Apache::style;
+use Apache::lontexconvert;
+use Apache::run;
+use Apache::londefdef;
+use Apache::scripttag;
+#================================================== Main subroutine: xmlparse
+
+sub xmlparse {
+
+ my ($target,$content_file_string,%style_for_target) = @_;
+ my $pars = HTML::TokeParser->new(\$content_file_string);
+ my $currentstring = '';
+ my $finaloutput = '';
+ my $newarg = '';
+ my $safeeval = new Safe;
+ $safeeval->permit("entereval");
+#-------------------- Redefinition of the target in the case of compound target
+
+ ($target, my @tenta) = split('&&',$target);
+
+#------------------------- Stack definition (in stack we have all current tags)
+
+ my @stack = ();
+ my @parstack = ();
+
+#------------------------------------- Parse input string (content_file_string)
+
+ my $token;
+
+ while ($token = $pars->get_token) {
+ if ($token->[0] eq 'T') {
+ $finaloutput .= &Apache::run::evaluate($token->[1],$safeeval,'');
+ } elsif ($token->[0] eq 'S') {
+ # add tag to stack
+ push (@stack,$token->[1]);
+ # add parameters list to another stack
+ push (@parstack,&parstring($token));
+
+ if (exists $style_for_target{$token->[1]}) {
+ #basically recurse, but we never got more than one level down so just
+ #create the new context here
+ my @innerstack = ();
+ my @innerparstack = ();
+ # use style file definition
+ $newarg = $style_for_target{$token->[1]};
+ my $pat = HTML::TokeParser->new(\$newarg);
+ my $tokenpat = '';
+ my $partstring = '';
+
+ while ($tokenpat = $pat->get_token) {
+ if ($tokenpat->[0] eq 'T') {
+ $partstring = $tokenpat->[1];
+ } elsif ($tokenpat->[0] eq 'S') {
+ push (@innerstack,$tokenpat->[1]);
+ push (@innerparstack,&parstring($tokenpat));
+ $partstring = &callsub("start_$tokenpat->[1]",
+ $target, $tokenpat, \@innerparstack)
+ } elsif ($tokenpat->[0] eq 'E') {
+ #clear out any tags that didn't end
+ while ($tokenpat->[1] ne $innerstack[$#innerstack]
+ && ($#innerstack > 0)) {pop @innerstack;pop @innerparstack;}
+ $partstring = &callsub("end_$tokenpat->[1]",
+ $target, $tokenpat, \@innerparstack)
+ }
+ #pass both the variable to the style tag, and the tag we
+ #are processing inside the <definedtag>
+ $finaloutput .= &Apache::run::evaluate($partstring,$safeeval,
+ $parstack[$#parstack].$innerparstack[$#innerparstack]);
+ if ($tokenpat->[0] eq 'E') { pop @innerstack;pop @innerparstack; }
}
+ } else {
+ my $result = &callsub("start_$token->[1]", $target, $token, \@parstack);
+ $finaloutput .= &Apache::run::evaluate($result,$safeeval,
+ $parstack[$#parstack]);
+ }
+ } 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]";
+ $finaloutput .= callsub($sub, $target, $token, \@parstack);
}
- } else {
-#--------------------------------------------------------------- outtext output
- while ($stoken = $pstyle->get_token and $stoken->[1] ne 'outtext') {
- if ($stoken->[1] eq 'definetag') {
- $flag = 1;
- last;
- }
- }
- if ($flag == 0) {
- while ($stoken = $pstyle->get_token and $stoken->[0] ne 'S') {
- $current_value .= $stoken->[1];
- }
- while ($stoken->[1] ne 'definetag') {
- if ($stoken->[0] eq 'S' and $stoken->[1] eq $target) {
- while ($stoken = $pstyle->get_token) {
- if ($stoken->[1] ne $target) {
- if ($stoken->[0] eq 'S') {
- my $flagelem = 0;
- for (my $i=$#value_style-1;$i>0;$i=$i-2) {
- if ($stoken->[1] eq $value_style[$i]) {
- $flagelem = 1;
- $iele = $i+1;
- last;
- }
- }
- if ($flagelem == 0) {
- $current_value .= $stoken->[4];
- } else {
- $current_value .= $value_style[$iele];
- }
- }
- if ($stoken->[0] eq 'E') {
- my $flagelem = 0;
- for (my $i=$#value_style-1;$i>0;$i=$i-2) {
- if ('/'.$stoken->[1] eq $value_style[$i]) {
- $flagelem = 1;
- $iele = $i+1;
- last;
- }
+ #---- 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 .= $tokenpat->[2];
+ }
}
- if ($flagelem == 0) {
- $current_value .= $stoken->[2];
- } else {
- $current_value .= $value_style[$iele];
- }
- }
- if ($stoken->[0] eq 'T') {
- $current_value .= $stoken->[1];
- }
- } else {
- last;
- }
- }
- } elsif ($stoken->[0] eq 'S' and $stoken->[1] ne $target) {
- my $tempotempo = $stoken->[1];
- while ($stoken = $pstyle->get_token and $stoken->[1] ne $tempotempo) {
+
+ my @tempor_list = split(',',$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;
+ }
+ }
+ return $finaloutput;
+}
- while ($stoken = $pstyle->get_token) {
- if ($stoken->[0] eq 'T') {
- $current_value .= $stoken->[1];
- }
- if ($stoken->[0] eq 'E') {
- last;
- }
- if ($stoken->[0] eq 'S') {
- last;
- }
- }
-
+sub callsub {
+ my ($sub,$target,$token,@parstack)=@_;
+ my $currentstring='';
+ {
+ no strict 'refs';
+ if (my $space=$Apache::lonxml::alltags{$token->[1]}) {
+ #print "Calling sub $sub in $space \n";
+ $sub="$space\:\:$sub";
+ $currentstring = &$sub($target,$token,\@parstack);
+ } else {
+ #print "NOT Calling sub $sub\n";
+ if (defined($token->[4])) {
+ $currentstring = $token->[4];
+ } else {
+ $currentstring = $token->[2];
}
- }
}
-
- }
- $current_value =~ s/(\s)+/$1/g;
- if ($current_value ne ' ' and $current_value ne '' ) {
- push (@value_style,lc $current_key,$current_value);
- }
- $current_key = '';
- $current_value = '';
-
- }
- my %style_for_target = @value_style;
-#--------------------------------------------------------------- check printing
-# while (($current_key,$current_value) = each %style_for_target) {
-# print "$current_key => $current_value\n";
-# }
-#---------------------------------------------------------------- return result
- return %style_for_target;
+ use strict 'refs';
+ }
+ return $currentstring;
}
+sub parstring {
+ my ($token) = @_;
+ my $temp='';
+ map {$temp .= "my \$$_=\"$token->[2]->{$_}\";"} @{$token->[3]};
+ return $temp;
+}
1;
__END__