Annotation of loncom/xml/lonxml.pm, revision 1.3
1.2 sakharuk 1: # The LearningOnline Network with CAPA
1.3 ! sakharuk 2: # XML Parser Module
1.2 sakharuk 3: #
1.3 ! sakharuk 4: # last modified 06/26/00 by Alexander Sakharuk
1.2 sakharuk 5:
1.3 ! sakharuk 6: package Apache::lonxmlparser;
1.1 sakharuk 7:
8: use strict;
9: use HTML::TokeParser;
1.3 ! sakharuk 10: use Safe;
! 11: use Apache::lonstyleparser;
! 12: use Apache::lontexconvert;
! 13: use Apache::londefaulttags;
! 14: #================================================== Main subroutine: xmlparse
! 15:
! 16: sub xmlparse {
! 17:
! 18: my ($target,$content_file_string,%style_for_target) = @_;
! 19: my $pars = HTML::TokeParser->new(\$content_file_string);
! 20: my $currentstring = '';
! 21: my $finaloutput = '';
! 22: my $newarg = '';
! 23: my $tempostring = '';
! 24: my $tempocont = '';
! 25: my $safeeval = new Safe;
! 26:
! 27: #-------------------- Redefinition of the target in the case of compound target
! 28:
! 29: ($target, my @tenta) = split('&&',$target);
! 30:
! 31: #------------------------- Stack definition (in stack we have all current tags)
! 32:
! 33: my @stack = ();
! 34: my @parstack = ();
! 35:
! 36: #------------------------------------- Parse input string (content_file_string)
! 37:
! 38: my $token;
! 39:
! 40: while ($token = $pars->get_token) {
! 41: if ($token->[0] eq 'T') {
! 42: $finaloutput .= $token->[1];
! 43: $tempocont .= $token->[1];
! 44: } elsif ($token->[0] eq 'S') {
! 45: #------------------------------------------------------------- add tag to stack
! 46: push (@stack,$token->[1]);
! 47: #----------------------------------------- add parameters list to another stack
! 48: map {$tempostring .= "$_=$token->[2]->{$_},"} @{$token->[3]};
! 49: push (@parstack,$tempostring);
! 50: $tempostring = '';
! 51:
! 52: if (exists $style_for_target{$token->[1]}) {
! 53:
! 54: #---------------------------------------------------- use style file definition
! 55:
! 56: $newarg = $style_for_target{$token->[1]};
! 57:
! 58: if (index($newarg,'script') != -1 ) {
! 59: my $pat = HTML::TokeParser->new(\$newarg);
! 60: my $tokenpat;
! 61: my $partstring = '';
! 62: my $oustring = '';
! 63: my $outputstring;
! 64:
! 65: while ($tokenpat = $pat->get_token) {
! 66: if ($tokenpat->[0] eq 'T') {
! 67: $oustring .= $tokenpat->[1];
! 68: } elsif ($tokenpat->[0] eq 'S') {
! 69: if ($tokenpat->[1] eq 'script') {
! 70: while ($tokenpat = $pat->get_token and $tokenpat->[1] ne 'script') {
! 71: if ($tokenpat->[0] eq 'S') {
! 72: $partstring .= $tokenpat->[4];
! 73: } elsif ($tokenpat->[0] eq 'T') {
! 74: $partstring .= $tokenpat->[1];
! 75: } elsif ($tokenpat->[0] eq 'E') {
! 76: $partstring .= $tokenpat->[2];
! 77: }
! 78: }
! 79:
! 80: map {$partstring =~ s/\$$_/$token->[2]->{$_}/g; } @{$token->[3]};
! 81:
! 82: &run($partstring,$safeeval);
! 83:
! 84: $partstring = '';
! 85: } elsif ($tokenpat->[1] eq 'evaluate') {
! 86: $outputstring = &evaluate($tokenpat->[2]{expression},$safeeval);
! 87: $oustring .= $outputstring;
! 88: } else {
! 89: $oustring .= $tokenpat->[4];
! 90: }
! 91: } elsif ($tokenpat->[0] eq 'E' and $tokenpat->[1] ne 'evaluate') {
! 92: $oustring .= $tokenpat->[1];
! 93: }
1.2 sakharuk 94: }
1.3 ! sakharuk 95: $newarg = $oustring;
1.2 sakharuk 96: } else {
1.3 ! sakharuk 97: map {$newarg =~ s/\$$_/$token->[2]->{$_}/g; } @{$token->[3]};
! 98: }
! 99: $finaloutput .= $newarg;
! 100: } else {
! 101: #------------------------------------------------ use default definition of tag
! 102: my $sub="start_$token->[1]";
! 103: {
! 104: no strict 'refs';
! 105: if (defined (&$sub)) {
! 106: $currentstring = &$sub($target,$token,\@parstack);
! 107: $finaloutput .= $currentstring;
! 108: $currentstring = '';
! 109: } else {
! 110: $finaloutput .= $token->[4];
! 111: }
! 112: use strict 'refs';
! 113: }
! 114: }
! 115: } elsif ($token->[0] eq 'E') {
! 116: # Put here check for correct final tag (to avoid existence of starting tag only)
! 117:
! 118: pop @stack;
! 119: unless (exists $style_for_target{$token->[1]}) {
! 120: my $sub="end_$token->[1]";
! 121: {
! 122: no strict 'refs';
! 123: if (defined (&$sub)) {
! 124: $currentstring = &$sub($target,$token,\@parstack);
! 125: $finaloutput .= $currentstring;
! 126: $currentstring = '';
! 127: } else {
! 128: $finaloutput .= $token->[4];
! 129: }
! 130: use strict 'refs';
1.2 sakharuk 131: }
1.3 ! sakharuk 132: }
! 133: #-------------------------------------------------- end tag from the style file
! 134: if (exists $style_for_target{'/'."$token->[1]"}) {
! 135: $newarg = $style_for_target{'/'."$token->[1]"};
! 136: if (index($newarg,'script') != -1 ) {
! 137: my $pat = HTML::TokeParser->new(\$newarg);
! 138: my $tokenpat;
! 139: my $partstring = '';
! 140: my $oustring = '';
! 141: my $outputstring;
! 142:
! 143: while ($tokenpat = $pat->get_token) {
! 144: if ($tokenpat->[0] eq 'T') {
! 145: $oustring .= $tokenpat->[1];
! 146: } elsif ($tokenpat->[0] eq 'S') {
! 147: if ($tokenpat->[1] eq 'script') {
! 148: while ($tokenpat = $pat->get_token and $tokenpat->[1] ne 'script') {
! 149: if ($tokenpat->[0] eq 'S') {
! 150: $partstring .= $tokenpat->[4];
! 151: } elsif ($tokenpat->[0] eq 'T') {
! 152: $partstring .= $tokenpat->[1];
! 153: } elsif ($tokenpat->[0] eq 'E') {
! 154: $partstring .= $tokenpat->[2];
! 155: }
1.2 sakharuk 156: }
1.3 ! sakharuk 157:
! 158: my @tempor_list = split(',',$parstack[$#parstack]);
! 159: my @te_kl = ();
! 160: my %tempor_hash = ();
! 161: map {(my $onete,my $twote) = split('=',$_); push (@te_kl,$onete);
! 162: $tempor_hash{$onete} = $twote} @tempor_list;
! 163: map {$partstring =~ s/\$$_/$tempor_hash{$_}/g; } @te_kl;
! 164:
! 165: &run($partstring,$safeeval);
! 166:
! 167: $partstring = '';
! 168: } elsif ($tokenpat->[1] eq 'evaluate') {
! 169: $outputstring = &evaluate($tokenpat->[2]{expression},$safeeval);
! 170: $oustring .= $outputstring;
! 171: } else {
! 172: $oustring .= $tokenpat->[4];
! 173: }
! 174: } elsif ($tokenpat->[0] eq 'E' and $tokenpat->[1] ne 'evaluate') {
! 175: $oustring .= $tokenpat->[1];
! 176: }
! 177: }
! 178: $newarg = $oustring;
! 179: } else {
! 180: my @very_temp = split(',',@parstack[$#parstack]);
! 181: map {my @ret= split('=',$_); $newarg =~ s/\$$ret[0]/$ret[1]/g; } @very_temp;
1.2 sakharuk 182: }
183:
1.3 ! sakharuk 184: $finaloutput .= $newarg;
1.2 sakharuk 185: }
1.3 ! sakharuk 186: pop @parstack;
! 187: }
! 188: }
! 189: return $finaloutput;
1.1 sakharuk 190: }
191:
192: 1;
193: __END__
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