version 1.6, 2000/06/29 13:58:23
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version 1.19, 2000/08/16 18:32:58
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Line 8 package Apache::lonxml;
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Line 8 package Apache::lonxml;
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use strict; |
use strict; |
use HTML::TokeParser; |
use HTML::TokeParser; |
use Safe; |
use Safe; |
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use Opcode; |
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sub register { |
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my $space; |
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my @taglist; |
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my $temptag; |
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($space,@taglist) = @_; |
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foreach $temptag (@taglist) { |
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$Apache::lonxml::alltags{$temptag}=$space; |
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} |
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} |
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use Apache::style; |
use Apache::style; |
use Apache::lontexconvert; |
use Apache::lontexconvert; |
use Apache::londefdef; |
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use Apache::run; |
use Apache::run; |
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use Apache::londefdef; |
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use Apache::scripttag; |
#================================================== Main subroutine: xmlparse |
#================================================== Main subroutine: xmlparse |
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sub xmlparse { |
sub xmlparse { |
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my ($target,$content_file_string,%style_for_target) = @_; |
my ($target,$content_file_string,$safeinit,%style_for_target) = @_; |
my $pars = HTML::TokeParser->new(\$content_file_string); |
my @pars = (); |
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push (@pars,HTML::TokeParser->new(\$content_file_string)); |
my $currentstring = ''; |
my $currentstring = ''; |
my $finaloutput = ''; |
my $finaloutput = ''; |
my $newarg = ''; |
my $newarg = ''; |
my $tempostring = ''; |
my $result; |
my $tempocont = ''; |
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my $safeeval = new Safe; |
my $safeeval = new Safe; |
$safeeval->permit("entereval"); |
$safeeval->permit("entereval"); |
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$safeeval->permit(":base_math"); |
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$safeeval->deny(":base_io"); |
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#need to inspect this class of ops |
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# $safeeval->deny(":base_orig"); |
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if ( $safeinit ne '') {&Apache::run::run($safeinit,$safeeval);} |
#-------------------- Redefinition of the target in the case of compound target |
#-------------------- Redefinition of the target in the case of compound target |
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($target, my @tenta) = split('&&',$target); |
($target, my @tenta) = split('&&',$target); |
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#------------------------- Stack definition (in stack we have all current tags) |
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my @stack = (); |
my @stack = (); |
my @parstack = (); |
my @parstack = (); |
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&initdepth; |
#------------------------------------- Parse input string (content_file_string) |
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my $token; |
my $token; |
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while ( $#pars > -1 ) { |
while ($token = $pars->get_token) { |
while ($token = $pars[$#pars]->get_token) { |
if ($token->[0] eq 'T') { |
if ($token->[0] eq 'T') { |
$finaloutput .= $token->[1]; |
$result=$token->[1]; |
$tempocont .= $token->[1]; |
# $finaloutput .= &Apache::run::evaluate($token->[1],$safeeval,''); |
} elsif ($token->[0] eq 'S') { |
} elsif ($token->[0] eq 'S') { |
#------------------------------------------------------------- add tag to stack |
# add tag to stack |
push (@stack,$token->[1]); |
push (@stack,$token->[1]); |
#----------------------------------------- add parameters list to another stack |
# add parameters list to another stack |
map {$tempostring .= "$_=$token->[2]->{$_},"} @{$token->[3]}; |
push (@parstack,&parstring($token)); |
push (@parstack,$tempostring); |
&increasedepth($token); |
$tempostring = ''; |
if (exists $style_for_target{$token->[1]}) { |
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$finaloutput .= &recurse($style_for_target{$token->[1]}, |
if (exists $style_for_target{$token->[1]}) { |
$target,$safeeval,\%style_for_target, |
# print "Style for $token->[1] is " .$style_for_target{$token->[1]}."\n"; |
@parstack); |
#---------------------------------------------------- use style file definition |
} else { |
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$result = &callsub("start_$token->[1]", $target, $token,\@parstack, |
$newarg = $style_for_target{$token->[1]}; |
\@pars, $safeeval, \%style_for_target); |
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} |
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} elsif ($token->[0] eq 'E') { |
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#clear out any tags that didn't end |
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while ($token->[1] ne $stack[$#stack] |
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&& ($#stack > -1)) {pop @stack;pop @parstack;&decreasedepth($token);} |
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if (index($newarg,'script') != -1 ) { |
if (exists $style_for_target{'/'."$token->[1]"}) { |
my $pat = HTML::TokeParser->new(\$newarg); |
$finaloutput .= &recurse($style_for_target{'/'."$token->[1]"}, |
my $tokenpat = ''; |
$target,$safeeval,\%style_for_target, |
my $partstring = ''; |
@parstack); |
my $oustring = ''; |
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my $outputstring; |
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while ($tokenpat = $pat->get_token) { |
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if ($tokenpat->[0] eq 'T') { |
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# print "evaluating $tokenpat->[4]\n"; |
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$oustring .= &Apache::run::evaluate($tokenpat->[1],$safeeval); |
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} elsif ($tokenpat->[0] eq 'S') { |
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if ($tokenpat->[1] eq 'script') { |
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while ($tokenpat = $pat->get_token and $tokenpat->[1] ne 'script') { |
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if ($tokenpat->[0] eq 'S') { |
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$partstring .= $tokenpat->[4]; |
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} elsif ($tokenpat->[0] eq 'T') { |
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$partstring .= $tokenpat->[1]; |
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} elsif ($tokenpat->[0] eq 'E') { |
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$partstring .= $tokenpat->[2]; |
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} |
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} |
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map {$partstring =~ s/\$$_/$token->[2]->{$_}/g; } @{$token->[3]}; |
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# print "want to use run\n"; |
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&Apache::run::run($partstring,$safeeval); |
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$partstring = ''; |
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} else { |
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# print "evaluating $tokenpat->[4]\n"; |
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$oustring .= &Apache::run::evaluate($tokenpat->[4],$safeeval); |
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} |
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} elsif ($tokenpat->[0] eq 'E' and $tokenpat->[1] ne 'evaluate') { |
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# print "hereish\n"; |
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$oustring .= $tokenpat->[1]; |
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} |
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} |
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$newarg = $oustring; |
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} else { |
} else { |
map {$newarg =~ s/\$$_/$token->[2]->{$_}/g; } @{$token->[3]}; |
$result = &callsub("end_$token->[1]", $target, $token, \@parstack, |
} |
\@pars,$safeeval, \%style_for_target); |
$finaloutput .= $newarg; |
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} else { |
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# use default definition of tag |
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my $sub="start_$token->[1]"; |
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{ |
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no strict 'refs'; |
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if (defined (&$sub)) { |
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$currentstring = &$sub($target,$token,\@parstack); |
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$finaloutput .= $currentstring; |
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$currentstring = ''; |
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} else { |
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$finaloutput .= $token->[4]; |
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} |
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use strict 'refs'; |
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} |
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} |
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} elsif ($token->[0] eq 'E') { |
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# Put here check for correct final tag (to avoid existence of |
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# starting tag only) |
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pop @stack; |
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unless (exists $style_for_target{$token->[1]}) { |
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my $sub="end_$token->[1]"; |
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{ |
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no strict 'refs'; |
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if (defined(&$sub)) { |
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$currentstring = &$sub($target,$token,\@parstack); |
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$finaloutput .= $currentstring; |
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$currentstring = ''; |
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} else { |
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$finaloutput .= $token->[4]; |
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} |
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use strict 'refs'; |
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} |
} |
} |
} |
#---- end tag from the style file |
if ($result ne "" ) { |
if (exists $style_for_target{'/'."$token->[1]"}) { |
if ( $#parstack > -1 ) { |
$newarg = $style_for_target{'/'."$token->[1]"}; |
$finaloutput .= &Apache::run::evaluate($result,$safeeval, |
if (index($newarg,'script') != -1 ) { |
$parstack[$#parstack]); |
my $pat = HTML::TokeParser->new(\$newarg); |
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my $tokenpat; |
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my $partstring = ''; |
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my $oustring = ''; |
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my $outputstring; |
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while ($tokenpat = $pat->get_token) { |
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if ($tokenpat->[0] eq 'T') { |
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$oustring .= $tokenpat->[1]; |
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} elsif ($tokenpat->[0] eq 'S') { |
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if ($tokenpat->[1] eq 'script') { |
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while ($tokenpat = $pat->get_token and $tokenpat->[1] ne 'script') { |
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if ($tokenpat->[0] eq 'S') { |
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$partstring .= $tokenpat->[4]; |
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} elsif ($tokenpat->[0] eq 'T') { |
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$partstring .= $tokenpat->[1]; |
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} elsif ($tokenpat->[0] eq 'E') { |
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$partstring .= $tokenpat->[2]; |
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} |
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} |
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my @tempor_list = split(',',$parstack[$#parstack]); |
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my @te_kl = (); |
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my %tempor_hash = (); |
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map {(my $onete,my $twote) = split('=',$_); push (@te_kl,$onete); |
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$tempor_hash{$onete} = $twote} @tempor_list; |
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map {$partstring =~ s/\$$_/$tempor_hash{$_}/g; } @te_kl; |
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print "want to use run\n"; |
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&Apache::run::run($partstring,$safeeval); |
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$partstring = ''; |
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} elsif ($tokenpat->[1] eq 'evaluate') { |
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$outputstring = &Apache::run::evaluate($tokenpat->[2]{expression},$safeeval); |
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$oustring .= $outputstring; |
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} else { |
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$oustring .= $tokenpat->[4]; |
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} |
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} elsif ($tokenpat->[0] eq 'E' and $tokenpat->[1] ne 'evaluate') { |
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$oustring .= $tokenpat->[1]; |
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} |
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} |
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$newarg = $oustring; |
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} else { |
} else { |
my @very_temp = split(',',$parstack[$#parstack]); |
$finaloutput .= &Apache::run::evaluate($result,$safeeval,''); |
map {my @ret= split('=',$_); $newarg =~ s/\$$ret[0]/$ret[1]/g; } @very_temp; |
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} |
} |
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$result = ''; |
$finaloutput .= $newarg; |
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} |
} |
pop @parstack; |
if ($token->[0] eq 'E') { pop @stack;pop @parstack;&decreasedepth($token);} |
} |
} |
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pop @pars; |
} |
} |
return $finaloutput; |
return $finaloutput; |
} |
} |
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sub recurse { |
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my @innerstack = (); |
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my @innerparstack = (); |
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my ($newarg,$target,$safeeval,$style_for_target,@parstack) = @_; |
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my @pat = (); |
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push (@pat,HTML::TokeParser->new(\$newarg)); |
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my $tokenpat; |
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my $partstring = ''; |
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my $output=''; |
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my $decls=''; |
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while ( $#pat > -1 ) { |
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while ($tokenpat = $pat[$#pat]->get_token) { |
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if ($tokenpat->[0] eq 'T') { |
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$partstring = $tokenpat->[1]; |
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} elsif ($tokenpat->[0] eq 'S') { |
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push (@innerstack,$tokenpat->[1]); |
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push (@innerparstack,&parstring($tokenpat)); |
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&increasedepth($tokenpat); |
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$partstring = &callsub("start_$tokenpat->[1]", |
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$target, $tokenpat, \@innerparstack, |
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\@pat, $safeeval, $style_for_target); |
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} elsif ($tokenpat->[0] eq 'E') { |
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#clear out any tags that didn't end |
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while ($tokenpat->[1] ne $innerstack[$#innerstack] |
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&& ($#innerstack > -1)) {pop @innerstack;pop @innerparstack; |
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&decreasedepth($tokenpat);} |
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$partstring = &callsub("end_$tokenpat->[1]", |
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$target, $tokenpat, \@innerparstack, |
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\@pat, $safeeval, $style_for_target); |
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} |
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#pass both the variable to the style tag, and the tag we |
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#are processing inside the <definedtag> |
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if ( $partstring ne "" ) { |
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if ( $#parstack > -1 ) { |
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if ( $#innerparstack > -1 ) { |
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$decls= $parstack[$#parstack].$innerparstack[$#innerparstack]; |
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} else { |
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$decls= $parstack[$#parstack]; |
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} |
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} else { |
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if ( $#innerparstack > -1 ) { |
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$decls=$innerparstack[$#innerparstack]; |
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} else { |
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$decls=''; |
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} |
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} |
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$output .= &Apache::run::evaluate($partstring,$safeeval,$decls); |
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$partstring = ''; |
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} |
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if ($tokenpat->[0] eq 'E') { pop @innerstack;pop @innerparstack; |
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&decreasedepth($tokenpat);} |
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} |
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pop @pat; |
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} |
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return $output; |
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} |
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sub callsub { |
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my ($sub,$target,$token,$parstack,$parser,$safeeval,$style)=@_; |
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my $currentstring=''; |
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{ |
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no strict 'refs'; |
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if (my $space=$Apache::lonxml::alltags{$token->[1]}) { |
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#print "Calling sub $sub in $space \n"; |
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$sub="$space\:\:$sub"; |
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$Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter); |
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$currentstring = &$sub($target,$token,$parstack,$parser, |
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$safeeval,$style); |
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} else { |
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#print "NOT Calling sub $sub\n"; |
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if (defined($token->[4])) { |
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$currentstring = $token->[4]; |
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} else { |
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$currentstring = $token->[2]; |
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} |
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} |
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use strict 'refs'; |
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} |
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return $currentstring; |
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} |
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sub initdepth { |
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@Apache::lonxml::depthcounter=(); |
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$Apache::lonxml::depth=-1; |
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$Apache::lonxml::olddepth=-1; |
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} |
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sub increasedepth { |
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my ($token) = @_; |
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if ($Apache::lonxml::depth<$Apache::lonxml::olddepth-1) { |
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$#Apache::lonxml::depthcounter--; |
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$Apache::lonxml::olddepth=$Apache::lonxml::depth; |
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} |
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$Apache::lonxml::depth++; |
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# print "<br>s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1]<br>\n"; |
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$Apache::lonxml::depthcounter[$Apache::lonxml::depth]++; |
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if ($Apache::lonxml::depthcounter[$Apache::lonxml::depth]==1) { |
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$Apache::lonxml::olddepth=$Apache::lonxml::depth; |
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} |
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} |
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sub decreasedepth { |
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my ($token) = @_; |
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$Apache::lonxml::depth--; |
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# print "<br>e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1]<br>\n"; |
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} |
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sub get_all_text { |
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my($tag,$pars)= @_; |
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my $depth=0; |
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my $token; |
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my $result=''; |
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while (($depth >=0) && ($token = $pars->get_token)) { |
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if ($token->[0] eq 'T') { |
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$result.=$token->[1]; |
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} elsif ($token->[0] eq 'S') { |
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if ($token->[1] eq $tag) { $depth++; } |
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$result.=$token->[4]; |
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} elsif ($token->[0] eq 'E') { |
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if ($token->[1] eq $tag) { $depth--; } |
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#skip sending back the last end tag |
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if ($depth > -1) { $result.=$token->[2]; } |
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} |
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} |
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return $result |
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} |
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sub parstring { |
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my ($token) = @_; |
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my $temp=''; |
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map {$temp .= "my \$$_=\"$token->[2]->{$_}\";"} @{$token->[3]}; |
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return $temp; |
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} |
1; |
1; |
__END__ |
__END__ |
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