--- loncom/xml/lonxml.pm 2000/06/26 21:35:20 1.3
+++ loncom/xml/lonxml.pm 2000/08/16 18:32:58 1.19
@@ -3,191 +3,243 @@
#
# last modified 06/26/00 by Alexander Sakharuk
-package Apache::lonxmlparser;
+package Apache::lonxml;
use strict;
use HTML::TokeParser;
use Safe;
-use Apache::lonstyleparser;
+use Opcode;
+
+sub register {
+ my $space;
+ my @taglist;
+ my $temptag;
+ ($space,@taglist) = @_;
+ foreach $temptag (@taglist) {
+ $Apache::lonxml::alltags{$temptag}=$space;
+ }
+}
+
+use Apache::style;
use Apache::lontexconvert;
-use Apache::londefaulttags;
+use Apache::run;
+use Apache::londefdef;
+use Apache::scripttag;
#================================================== Main subroutine: xmlparse
sub xmlparse {
- my ($target,$content_file_string,%style_for_target) = @_;
- my $pars = HTML::TokeParser->new(\$content_file_string);
+ my ($target,$content_file_string,$safeinit,%style_for_target) = @_;
+ my @pars = ();
+ push (@pars,HTML::TokeParser->new(\$content_file_string));
my $currentstring = '';
my $finaloutput = '';
my $newarg = '';
- my $tempostring = '';
- my $tempocont = '';
+ my $result;
my $safeeval = new Safe;
-
+ $safeeval->permit("entereval");
+ $safeeval->permit(":base_math");
+ $safeeval->deny(":base_io");
+#need to inspect this class of ops
+# $safeeval->deny(":base_orig");
+ if ( $safeinit ne '') {&Apache::run::run($safeinit,$safeeval);}
#-------------------- Redefinition of the target in the case of compound target
($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];
- }
- }
- $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';
+ while ( $#pars > -1 ) {
+ while ($token = $pars[$#pars]->get_token) {
+ if ($token->[0] eq 'T') {
+ $result=$token->[1];
+# $finaloutput .= &Apache::run::evaluate($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));
+ &increasedepth($token);
+ if (exists $style_for_target{$token->[1]}) {
+ $finaloutput .= &recurse($style_for_target{$token->[1]},
+ $target,$safeeval,\%style_for_target,
+ @parstack);
+ } else {
+ $result = &callsub("start_$token->[1]", $target, $token,\@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]
+ && ($#stack > -1)) {pop @stack;pop @parstack;&decreasedepth($token);}
+
+ if (exists $style_for_target{'/'."$token->[1]"}) {
+ $finaloutput .= &recurse($style_for_target{'/'."$token->[1]"},
+ $target,$safeeval,\%style_for_target,
+ @parstack);
+ } else {
+ $result = &callsub("end_$token->[1]", $target, $token, \@parstack,
+ \@pars,$safeeval, \%style_for_target);
}
}
-#-------------------------------------------------- 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 = $oustring;
+ if ($result ne "" ) {
+ if ( $#parstack > -1 ) {
+ $finaloutput .= &Apache::run::evaluate($result,$safeeval,
+ $parstack[$#parstack]);
} else {
- my @very_temp = split(',',@parstack[$#parstack]);
- map {my @ret= split('=',$_); $newarg =~ s/\$$ret[0]/$ret[1]/g; } @very_temp;
+ $finaloutput .= &Apache::run::evaluate($result,$safeeval,'');
}
-
- $finaloutput .= $newarg;
+ $result = '';
}
- pop @parstack;
- }
+ if ($token->[0] eq 'E') { pop @stack;pop @parstack;&decreasedepth($token);}
+ }
+ pop @pars;
}
return $finaloutput;
}
+sub recurse {
+
+ my @innerstack = ();
+ my @innerparstack = ();
+ my ($newarg,$target,$safeeval,$style_for_target,@parstack) = @_;
+ my @pat = ();
+ push (@pat,HTML::TokeParser->new(\$newarg));
+ my $tokenpat;
+ my $partstring = '';
+ my $output='';
+ my $decls='';
+ while ( $#pat > -1 ) {
+ while ($tokenpat = $pat[$#pat]->get_token) {
+ if ($tokenpat->[0] eq 'T') {
+ $partstring = $tokenpat->[1];
+ } elsif ($tokenpat->[0] eq 'S') {
+ push (@innerstack,$tokenpat->[1]);
+ push (@innerparstack,&parstring($tokenpat));
+ &increasedepth($tokenpat);
+ $partstring = &callsub("start_$tokenpat->[1]",
+ $target, $tokenpat, \@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]
+ && ($#innerstack > -1)) {pop @innerstack;pop @innerparstack;
+ &decreasedepth($tokenpat);}
+ $partstring = &callsub("end_$tokenpat->[1]",
+ $target, $tokenpat, \@innerparstack,
+ \@pat, $safeeval, $style_for_target);
+ }
+ #pass both the variable to the style tag, and the tag we
+ #are processing inside the <definedtag>
+ 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;
+ }
+ return $output;
+}
+
+sub callsub {
+ my ($sub,$target,$token,$parstack,$parser,$safeeval,$style)=@_;
+ my $currentstring='';
+ {
+ no strict 'refs';
+ if (my $space=$Apache::lonxml::alltags{$token->[1]}) {
+ #print "Calling sub $sub in $space \n";
+ $sub="$space\:\:$sub";
+ $Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter);
+ $currentstring = &$sub($target,$token,$parstack,$parser,
+ $safeeval,$style);
+ } else {
+ #print "NOT Calling sub $sub\n";
+ if (defined($token->[4])) {
+ $currentstring = $token->[4];
+ } else {
+ $currentstring = $token->[2];
+ }
+ }
+ use strict 'refs';
+ }
+ return $currentstring;
+}
+
+sub initdepth {
+ @Apache::lonxml::depthcounter=();
+ $Apache::lonxml::depth=-1;
+ $Apache::lonxml::olddepth=-1;
+}
+
+sub increasedepth {
+ my ($token) = @_;
+ if ($Apache::lonxml::depth<$Apache::lonxml::olddepth-1) {
+ $#Apache::lonxml::depthcounter--;
+ $Apache::lonxml::olddepth=$Apache::lonxml::depth;
+ }
+ $Apache::lonxml::depth++;
+# print "<br>s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1]<br>\n";
+ $Apache::lonxml::depthcounter[$Apache::lonxml::depth]++;
+ if ($Apache::lonxml::depthcounter[$Apache::lonxml::depth]==1) {
+ $Apache::lonxml::olddepth=$Apache::lonxml::depth;
+ }
+}
+
+sub decreasedepth {
+ my ($token) = @_;
+ $Apache::lonxml::depth--;
+# print "<br>e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1]<br>\n";
+}
+
+sub get_all_text {
+
+ my($tag,$pars)= @_;
+ my $depth=0;
+ my $token;
+ my $result='';
+ while (($depth >=0) && ($token = $pars->get_token)) {
+ if ($token->[0] eq 'T') {
+ $result.=$token->[1];
+ } 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]; }
+ }
+ }
+ return $result
+}
+
+
+sub parstring {
+ my ($token) = @_;
+ my $temp='';
+ map {$temp .= "my \$$_=\"$token->[2]->{$_}\";"} @{$token->[3]};
+ return $temp;
+}
1;
__END__
+
+
+
+
+