version 1.2, 2000/06/23 20:40:06
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version 1.64, 2001/03/27 17:47:43
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# The LearningOnline Network with CAPA |
# 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 |
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# 11/6 Gerd Kortemeyer |
package Apache::lonstyleparser; |
# 6/1/1 Gerd Kortemeyer |
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# 2/21,3/13 Guy |
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package Apache::lonxml; |
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use vars |
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qw(@pwd @outputstack $redirection $import @extlinks $metamode); |
use strict; |
use strict; |
use HTML::TokeParser; |
use HTML::TokeParser; |
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use Safe; |
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use Safe::Hole; |
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use Opcode; |
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use Apache::Constants qw(:common); |
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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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#============================================================= style subroutine |
sub printalltags { |
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my $temp; |
sub styleparser { |
foreach $temp (sort keys %Apache::lonxml::alltags) { |
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&Apache::lonxml::debug("$temp -- $Apache::lonxml::alltags{$temp}"); |
my ($target,$content_style_string) = @_; |
} |
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} |
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use Apache::style; |
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use Apache::lontexconvert; |
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use Apache::run; |
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use Apache::londefdef; |
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use Apache::scripttag; |
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use Apache::edit; |
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#================================================== Main subroutine: xmlparse |
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@pwd=(); |
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@outputstack = (); |
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$redirection = 0; |
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$import = 1; |
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@extlinks=(); |
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$metamode = 0; |
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sub xmlparse { |
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my ($target,$content_file_string,$safeinit,%style_for_target) = @_; |
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if ($target eq 'meta') { |
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# meta mode is a bit weird only some output is to be turned off |
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#<output> tag turns metamode off (defined in londefdef.pm) |
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$Apache::lonxml::redirection = 0; |
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$Apache::lonxml::metamode = 1; |
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$Apache::lonxml::import = 0; |
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} elsif ($target eq 'grade') { |
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&startredirection; |
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$Apache::lonxml::metamode = 0; |
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$Apache::lonxml::import = 1; |
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} else { |
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$Apache::lonxml::metamode = 0; |
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$Apache::lonxml::redirection = 0; |
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$Apache::lonxml::import = 1; |
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} |
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#&printalltags(); |
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my @pars = (); |
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@Apache::lonxml::pwd=(); |
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my $pwd=$ENV{'request.filename'}; |
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$pwd =~ s:/[^/]*$::; |
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&newparser(\@pars,\$content_file_string,$pwd); |
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my $currentstring = ''; |
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my $finaloutput = ''; |
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my $newarg = ''; |
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my $result; |
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my $safeeval = new Safe; |
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my $safehole = new Safe::Hole; |
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$safeeval->permit("entereval"); |
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$safeeval->permit(":base_math"); |
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$safeeval->deny(":base_io"); |
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$safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT'); |
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#need to inspect this class of ops |
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# $safeeval->deny(":base_orig"); |
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$safeinit .= ';$external::target='.$target.';'; |
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$safeinit .= ';$external::randomseed='.&Apache::lonnet::rndseed().';'; |
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&Apache::run::run($safeinit,$safeeval); |
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#-------------------- Redefinition of the target in the case of compound target |
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($target, my @tenta) = split('&&',$target); |
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my @stack = (); |
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my @parstack = (); |
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&initdepth; |
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my $token; |
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while ( $#pars > -1 ) { |
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while ($token = $pars[$#pars]->get_token) { |
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if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) { |
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if ($metamode<1) { $result=$token->[1]; } |
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} elsif ($token->[0] eq 'PI') { |
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if ($metamode<1) { $result=$token->[2]; } |
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} elsif ($token->[0] eq 'S') { |
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# add tag to stack |
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push (@stack,$token->[1]); |
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# add parameters list to another stack |
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push (@parstack,&parstring($token)); |
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&increasedepth($token); |
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if (exists $style_for_target{$token->[1]}) { |
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if ($Apache::lonxml::redirection) { |
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$Apache::lonxml::outputstack['-1'] .= |
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&recurse($style_for_target{$token->[1]},$target,$safeeval, |
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\%style_for_target,@parstack); |
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} else { |
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$finaloutput .= &recurse($style_for_target{$token->[1]},$target, |
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$safeeval,\%style_for_target,@parstack); |
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} |
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} else { |
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$result = &callsub("start_$token->[1]", $target, $token,\@parstack, |
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\@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] && ($#stack > -1)) { |
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&Apache::lonxml::warning("Unbalanced tags in resource $stack['-1']"); |
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pop @stack;pop @parstack;&decreasedepth($token); |
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} |
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if (exists $style_for_target{'/'."$token->[1]"}) { |
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if ($Apache::lonxml::redirection) { |
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$Apache::lonxml::outputstack['-1'] .= |
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&recurse($style_for_target{'/'."$token->[1]"}, |
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$target,$safeeval,\%style_for_target,@parstack); |
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} else { |
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$finaloutput .= &recurse($style_for_target{'/'."$token->[1]"}, |
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$target,$safeeval,\%style_for_target, |
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@parstack); |
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} |
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#------------------------------------------- target redefinition (if necessary) |
} else { |
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$result = &callsub("end_$token->[1]", $target, $token, \@parstack, |
my @target_string = ''; |
\@pars,$safeeval, \%style_for_target); |
my $element; |
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($element,@target_string) = split ('&&',$target); |
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map {$content_style_string =~ s/\<(.*)$_\>/\<$1$element\>/g; } @target_string; |
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$target = $element; |
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#-------------------------------------------- create a table for defined target |
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#----------------------------------------- from the information from Style File |
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my @value_style = (); |
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my $current_key = ''; |
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my $current_value = ''; |
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my $stoken; |
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my $flag; |
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my $iele; |
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my $pstyle = HTML::TokeParser->new(\$content_style_string); |
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while ($stoken = $pstyle->get_token) { |
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#----------------------------------------------------- start for tag definition |
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if ($stoken->[0] eq 'S' and $stoken->[1] eq 'definetag') { |
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#-------------------------------------------------------------- new key in hash |
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$current_key = $stoken->[2]{name}; |
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$flag = 0; |
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#-------------------------------------------------------------- metadata output |
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if ($target eq 'meta') { |
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while ($stoken = $pstyle->get_token and $stoken->[1] ne 'definetag') { |
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if ($stoken->[0] eq 'S' and $stoken->[1] eq 'meta') { |
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while ($stoken = $pstyle->get_token and $stoken->[1] ne 'meta') { |
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$current_value .= $stoken->[1]; |
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} |
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} |
} |
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} else { |
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&Apache::lonxml::error("Unknown token event :$token->[0]:$token->[1]:"); |
} |
} |
} else { |
#evaluate variable refs in result |
#--------------------------------------------------------------- outtext output |
if ($result ne "") { |
while ($stoken = $pstyle->get_token and $stoken->[1] ne 'outtext') { |
if ( $#parstack > -1 ) { |
if ($stoken->[1] eq 'definetag') { |
if ($Apache::lonxml::redirection) { |
$flag = 1; |
$Apache::lonxml::outputstack['-1'] .= |
last; |
&Apache::run::evaluate($result,$safeeval,$parstack[$#parstack]); |
} |
} else { |
} |
$finaloutput .= &Apache::run::evaluate($result,$safeeval, |
if ($flag == 0) { |
$parstack[$#parstack]); |
while ($stoken = $pstyle->get_token and $stoken->[0] ne 'S') { |
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$current_value .= $stoken->[1]; |
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} |
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while ($stoken->[1] ne 'definetag') { |
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if ($stoken->[0] eq 'S' and $stoken->[1] eq $target) { |
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while ($stoken = $pstyle->get_token) { |
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if ($stoken->[1] ne $target) { |
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if ($stoken->[0] eq 'S') { |
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my $flagelem = 0; |
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for (my $i=$#value_style-1;$i>0;$i=$i-2) { |
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if ($stoken->[1] eq $value_style[$i]) { |
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$flagelem = 1; |
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$iele = $i+1; |
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last; |
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} |
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} |
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if ($flagelem == 0) { |
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$current_value .= $stoken->[4]; |
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} else { |
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$current_value .= $value_style[$iele]; |
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} |
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} |
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if ($stoken->[0] eq 'E') { |
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my $flagelem = 0; |
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for (my $i=$#value_style-1;$i>0;$i=$i-2) { |
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if ('/'.$stoken->[1] eq $value_style[$i]) { |
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$flagelem = 1; |
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$iele = $i+1; |
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last; |
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} |
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} |
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if ($flagelem == 0) { |
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$current_value .= $stoken->[2]; |
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} else { |
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$current_value .= $value_style[$iele]; |
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} |
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} |
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if ($stoken->[0] eq 'T') { |
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$current_value .= $stoken->[1]; |
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} |
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} else { |
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last; |
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} |
} |
} |
} else { |
} elsif ($stoken->[0] eq 'S' and $stoken->[1] ne $target) { |
$finaloutput .= &Apache::run::evaluate($result,$safeeval,''); |
my $tempotempo = $stoken->[1]; |
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while ($stoken = $pstyle->get_token and $stoken->[1] ne $tempotempo) { |
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} |
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} |
} |
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$result = ''; |
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} |
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if ($token->[0] eq 'E') { |
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pop @stack;pop @parstack;&decreasedepth($token); |
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} |
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} |
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pop @pars; |
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pop @Apache::lonxml::pwd; |
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} |
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# if ($target eq 'meta') { |
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# $finaloutput.=&endredirection; |
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# } |
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return $finaloutput; |
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} |
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while ($stoken = $pstyle->get_token) { |
sub recurse { |
if ($stoken->[0] eq 'T') { |
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$current_value .= $stoken->[1]; |
my @innerstack = (); |
} |
my @innerparstack = (); |
if ($stoken->[0] eq 'E') { |
my ($newarg,$target,$safeeval,$style_for_target,@parstack) = @_; |
last; |
my @pat = (); |
} |
&newparser(\@pat,\$newarg); |
if ($stoken->[0] eq 'S') { |
my $tokenpat; |
last; |
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 (($tokenpat->[0] eq 'T') || ($tokenpat->[0] eq 'C') || ($tokenpat->[0] eq 'D') ) { |
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if ($metamode<1) { $partstring=$tokenpat->[1]; } |
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} elsif ($tokenpat->[0] eq 'PI') { |
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if ($metamode<1) { $partstring=$tokenpat->[2]; } |
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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)) { |
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&Apache::lonxml::warning("Unbalanced tags in resource $innerstack['-1']"); |
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pop @innerstack;pop @innerparstack;&decreasedepth($tokenpat); |
} |
} |
} |
$partstring = &callsub("end_$tokenpat->[1]", |
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$target, $tokenpat, \@innerparstack, |
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\@pat, $safeeval, $style_for_target); |
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} else { |
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&Apache::lonxml::error("Unknown token event :$tokenpat->[0]:$tokenpat->[1]:"); |
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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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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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pop @Apache::lonxml::pwd; |
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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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my $sub1; |
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no strict 'refs'; |
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if ($target eq 'edit' && $token->[0] eq 'S') { |
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$currentstring = &Apache::edit::tag_start($target,$token,$parstack,$parser, |
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$safeeval,$style); |
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} |
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if (my $space=$Apache::lonxml::alltags{$token->[1]}) { |
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# &Apache::lonxml::debug("Calling sub $sub in $space $metamode<br />\n"); |
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$sub1="$space\:\:$sub"; |
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$Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter); |
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$currentstring .= &$sub1($target,$token,$parstack,$parser, |
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$safeeval,$style); |
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} else { |
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# &Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode<br />\n"); |
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if ($metamode <1) { |
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if (defined($token->[4]) && ($metamode < 1)) { |
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$currentstring .= $token->[4]; |
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} else { |
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$currentstring .= $token->[2]; |
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} |
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} |
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} |
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if ($target eq 'edit' && $token->[0] eq 'E') { |
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$currentstring .= &Apache::edit::tag_end($target,$token,$parstack,$parser, |
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$safeeval,$style); |
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} |
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use strict 'refs'; |
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} |
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return $currentstring; |
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} |
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sub startredirection { |
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$Apache::lonxml::redirection++; |
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push (@Apache::lonxml::outputstack, ''); |
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} |
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sub endredirection { |
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if (!$Apache::lonxml::redirection) { |
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&Apache::lonxml::error("Endredirection was called, before a startredirection, perhaps you have unbalanced tags. Some debuggin information:".join ":",caller); |
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return ''; |
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} |
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$Apache::lonxml::redirection--; |
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pop @Apache::lonxml::outputstack; |
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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 ($token) = @_; |
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$Apache::lonxml::depth++; |
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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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my $curdepth=join('_',@Apache::lonxml::depthcounter); |
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&Apache::lonxml::debug("s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n"); |
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#print "<br />s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n"; |
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} |
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sub decreasedepth { |
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my ($token) = @_; |
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$Apache::lonxml::depth--; |
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if ($Apache::lonxml::depth<$Apache::lonxml::olddepth-1) { |
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$#Apache::lonxml::depthcounter--; |
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$Apache::lonxml::olddepth=$Apache::lonxml::depth+1; |
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} |
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if ( $Apache::lonxml::depth < -1) { |
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&Apache::lonxml::warning("Unbalanced tags in resource"); |
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$Apache::lonxml::depth='-1'; |
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} |
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my $curdepth=join('_',@Apache::lonxml::depthcounter); |
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&Apache::lonxml::debug("e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n"); |
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#print "<br />e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n"; |
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} |
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sub get_all_text { |
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|
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my($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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if ( $tag =~ m:^/: ) { |
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my $tag=substr($tag,1); |
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# &Apache::lonxml::debug("have:$tag:"); |
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while (($depth >=0) && ($token = $pars->get_token)) { |
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# &Apache::lonxml::debug("e token:$token->[0]:$depth:$token->[1]"); |
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if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) { |
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$result.=$token->[1]; |
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} elsif ($token->[0] eq 'PI') { |
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$result.=$token->[2]; |
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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]; } else { |
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$pars->unget_token($token); |
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} |
} |
} |
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} |
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} else { |
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while ($token = $pars->get_token) { |
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# &Apache::lonxml::debug("s token:$token->[0]:$depth:$token->[1]"); |
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if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) { |
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$result.=$token->[1]; |
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} elsif ($token->[0] eq 'PI') { |
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$result.=$token->[2]; |
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} elsif ($token->[0] eq 'S') { |
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if ( $token->[1] eq $tag) { |
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$pars->unget_token($token); last; |
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} else { |
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$result.=$token->[4]; |
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} |
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} elsif ($token->[0] eq 'E') { |
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$result.=$token->[2]; |
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} |
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} |
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} |
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# &Apache::lonxml::debug("Exit:$result:"); |
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return $result |
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} |
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sub newparser { |
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my ($parser,$contentref,$dir) = @_; |
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push (@$parser,HTML::TokeParser->new($contentref)); |
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$$parser['-1']->xml_mode('1'); |
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if ( $dir eq '' ) { |
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push (@Apache::lonxml::pwd, $Apache::lonxml::pwd[$#Apache::lonxml::pwd]); |
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} else { |
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push (@Apache::lonxml::pwd, $dir); |
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} |
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# &Apache::lonxml::debug("pwd:$#Apache::lonxml::pwd"); |
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# &Apache::lonxml::debug("pwd:$Apache::lonxml::pwd[$#Apache::lonxml::pwd]"); |
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} |
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sub parstring { |
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my ($token) = @_; |
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my $temp=''; |
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map { |
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unless ($_=~/\W/) { |
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my $val=$token->[2]->{$_}; |
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$val =~ s/([\%\@\\])/\\$1/g; |
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#if ($val =~ m/^[\%\@]/) { $val="\\".$val; } |
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$temp .= "my \$$_=\"$val\";" |
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} |
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} @{$token->[3]}; |
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return $temp; |
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} |
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sub writeallows { |
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my $thisurl='/res/'.&Apache::lonnet::declutter(shift); |
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my $thisdir=$thisurl; |
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$thisdir=~s/\/[^\/]+$//; |
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my %httpref=(); |
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map { |
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$httpref{'httpref.'. |
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&Apache::lonnet::hreflocation($thisdir,$_)}=$thisurl; } @extlinks; |
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&Apache::lonnet::appenv(%httpref); |
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} |
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sub handler { |
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my $request=shift; |
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my $target='web'; |
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$Apache::lonxml::debug=1; |
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if ($ENV{'browser.mathml'}) { |
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$request->content_type('text/xml'); |
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} else { |
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$request->content_type('text/html'); |
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} |
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# $request->print(<<ENDHEADER); |
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#<html> |
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#<head> |
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#<title>Just test</title> |
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#</head> |
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#<body bgcolor="#FFFFFF"> |
|
#ENDHEADER |
|
# &Apache::lonhomework::send_header($request); |
|
$request->send_http_header; |
|
|
|
return OK if $request->header_only; |
|
|
|
if ($target eq 'web') { |
|
$request->print(&Apache::lontexconvert::header()); |
|
$request->print('<body bgcolor="#FFFFFF">'."\n"); |
|
} |
|
|
|
my $file=&Apache::lonnet::filelocation("",$request->uri); |
|
my %mystyle; |
|
my $result = ''; |
|
my $filecontents=&Apache::lonnet::getfile($file); |
|
if ($filecontents == -1) { |
|
&Apache::lonxml::error("<b> Unable to find <i>$file</i></b>"); |
|
$filecontents=''; |
|
} else { |
|
$result = &Apache::lonxml::xmlparse($target,$filecontents,'',%mystyle); |
|
} |
|
$request->print($result); |
|
|
|
|
|
if ($target eq 'tex') { |
|
# $request->print('\end{document}'."\n"); |
|
} elsif ($target eq 'web') { |
|
$request->print('</body>'); |
|
$request->print(&Apache::lontexconvert::footer()); |
|
} |
|
|
|
writeallows($request->uri); |
|
return OK; |
|
} |
|
|
|
$Apache::lonxml::debug=0; |
|
sub debug { |
|
if ($Apache::lonxml::debug eq 1) { |
|
print "DEBUG:".$_[0]."<br />\n"; |
|
} |
|
} |
|
|
|
sub error { |
|
if ($Apache::lonxml::debug eq 1) { |
|
print "<b>ERROR:</b>".$_[0]."<br />\n"; |
|
} else { |
|
print "<b>An Error occured while processing this resource. The instructor has been notified.</b> <br />"; |
|
#notify author |
|
&Apache::lonmsg::author_res_msg($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. |
$current_value =~ s/(\s)+/$1/g; |
&Apache::lonmsg::user_normal_msg('albertel','msu',"Error in $ENV{'request.filename'}",$_[0]); |
if ($current_value ne ' ' and $current_value ne '' ) { |
#&Apache::lonmsg::user_normal_msg('albertel','103',"Error in $ENV{'request.filename'}",$_[0]); |
push (@value_style,lc $current_key,$current_value); |
} |
} |
} |
$current_key = ''; |
|
$current_value = ''; |
|
|
|
} |
sub warning { |
my %style_for_target = @value_style; |
if ($Apache::lonxml::debug eq 1) { |
#--------------------------------------------------------------- check printing |
print "<b>W</b>ARNING<b>:</b>".$_[0]."<br />\n"; |
# while (($current_key,$current_value) = each %style_for_target) { |
} |
# print "$current_key => $current_value\n"; |
|
# } |
|
#---------------------------------------------------------------- return result |
|
return %style_for_target; |
|
} |
} |
|
|
1; |
1; |