Return to style.pm CVS log

Up to [LON-CAPA] / loncom / xml

Added/modified POD comments

    1: # The LearningOnline Network with CAPA
    2: # Style Parser Module (new version)
    3: #
    4: # $Id: style.pm,v 1.22 2008/11/24 18:55:01 jms Exp $
    5: #
    6: # Copyright Michigan State University Board of Trustees
    7: #
    8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
    9: #
   10: # LON-CAPA is free software; you can redistribute it and/or modify
   11: # it under the terms of the GNU General Public License as published by
   12: # the Free Software Foundation; either version 2 of the License, or
   13: # (at your option) any later version.
   14: #
   15: # LON-CAPA is distributed in the hope that it will be useful,
   16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
   17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   18: # GNU General Public License for more details.
   19: #
   20: # You should have received a copy of the GNU General Public License
   21: # along with LON-CAPA; if not, write to the Free Software
   22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
   23: #
   24: # /home/httpd/html/adm/gpl.txt
   25: #
   26: # http://www.lon-capa.org/
   27: #
   28: # Copyright for TtHfunc and TtMfunc by Ian Hutchinson. 
   29: # TtHfunc and TtMfunc (the "Code") may be compiled and linked into 
   30: # binary executable programs or libraries distributed by the 
   31: # Michigan State University (the "Licensee"), but any binaries so 
   32: # distributed are hereby licensed only for use in the context
   33: # of a program or computational system for which the Licensee is the 
   34: # primary author or distributor, and which performs substantial 
   35: # additional tasks beyond the translation of (La)TeX into HTML.
   36: # The C source of the Code may not be distributed by the Licensee
   37: # to any other parties under any circumstances.
   38: #
   39: # written 01/08/01 by Alexander Sakharuk
   40: #
   41: 
   42: package Apache::style;
   43: 
   44: use strict;
   45: use HTML::TokeParser;
   46: 
   47: sub styleparser {
   48: 
   49:     my ($target,$content_style_string)=@_;
   50:     my @keys = ();
   51:     my @values = ();
   52:     my $current_value;
   53:     my $allow=0;
   54:     my $pstyle = HTML::TokeParser->new(\$content_style_string);
   55:     $pstyle->xml_mode('1');
   56:     while (my $stoken = $pstyle->get_token) {
   57: 	if (($stoken->[0] eq 'S') && ($stoken->[1] eq 'definetag')) {
   58: 	    push @keys,$stoken->[2]->{'name'};
   59:             $current_value='';
   60: 	    $allow=0;
   61: 	} elsif (($stoken->[0] eq 'E') && ($stoken->[1] eq 'definetag')) {
   62: 	    $current_value =~ s/(\s)+/$1/g;
   63: 	    $current_value =~ s/\n//g;
   64: 	    push(@values,$current_value);
   65: 	} elsif (($target eq 'meta') && ($stoken->[0] eq 'S') && ($stoken->[1] eq 'meta')) {
   66: 	    $allow=1;
   67:         } elsif (($target eq 'meta') && ($stoken->[0] eq 'E') && ($stoken->[1] eq 'meta')) {
   68: 	    $allow=0;
   69: 	} elsif (($target ne 'meta') && ($stoken->[0] eq 'S') && ($stoken->[1] eq 'render')) {
   70: 	    $allow=1;
   71: 	} elsif (($target ne 'meta') && ($stoken->[0] eq 'E') && ($stoken->[1] eq 'render')) {
   72: 	    $allow=0;
   73: 	} elsif (($target ne 'meta') && ($target ne 'web') && ($stoken->[0] eq 'S') && ($stoken->[1] eq 'web')) {
   74: 	    $allow=0;
   75: 	} elsif (($target ne 'meta') && ($target ne 'web') && ($stoken->[0] eq 'E') && ($stoken->[1] eq 'web')) {
   76: 	    $allow=1;
   77: 	} elsif (($target ne 'meta') && ($target ne 'tex') && ($stoken->[0] eq 'S') && ($stoken->[1] eq 'tex')) {
   78: 	    $allow=0;
   79: 	} elsif (($target ne 'meta') && ($target ne 'tex') && ($stoken->[0] eq 'E') && ($stoken->[1] eq 'tex')) {
   80: 	    $allow=1;
   81: 	} elsif (($stoken->[0] eq 'S') && ($stoken->[1] eq 'target') && (not $stoken->[2]->{'name'}=~/(^\s*$target\s*,|,\s*$target\s*,|,\s*$target\s*$|^\s*$target\s*$)/)) {
   82: 	    $allow=0;
   83: 	} elsif (($stoken->[0] eq 'E') && ($stoken->[1] eq 'target')) {
   84: 	    $allow=1;
   85:  	} elsif (($target ne 'meta') && ($stoken->[0] eq 'S') && ($stoken->[1] eq $target)) {
   86: 	    $allow=1;
   87: 	} elsif (($target ne 'meta') && ($stoken->[0] eq 'E') && ($stoken->[1] eq $target)) {
   88: 	} elsif (($stoken->[0] eq 'S') && ($stoken->[1] eq 'target') && ($stoken->[2]->{'name'}=~/(^\s*$target\s*,|,\s*$target\s*,|,\s*$target\s*$|^\s*$target\s*$)/)) {
   89: 	    $allow=1;
   90: 	} elsif ($allow) { 
   91: 	    if ($stoken->[0] eq 'T') {
   92: 		$current_value .= $stoken->[1];
   93: 	    } elsif ($stoken->[0] eq 'S') {
   94: 		my $number=-1;
   95: 		if ($stoken->[1] ne $keys[-1]) {
   96: 		    $number = &testkey($stoken->[0],$stoken->[1],@keys);
   97: 		}
   98: 		if ($number != -1) {
   99: 		    $current_value .= &testvalue($number,$stoken->[0],$stoken->[2],@values);
  100: 		} else {
  101: 		    $current_value .= $stoken->[4];
  102: 		}
  103: 	    } elsif ($stoken->[0] eq 'E') {
  104: 		my $number=-1;
  105: 		if (('/'.$stoken->[1]) ne $keys[-1]) {
  106: 		    $number = &testkey($stoken->[0],$stoken->[1],@keys);
  107: 		}
  108: 		if ($number != -1) {
  109: 		    $current_value .= &testvalue($number,$stoken->[0],$stoken->[2],@values);
  110: 		} else {
  111: 		    $current_value .= $stoken->[2];
  112: 		}
  113: 	    }
  114: 	}
  115:     }
  116:     my %style_for_target;
  117:     for (my $i=0; $i<=$#keys; $i++) {
  118: 	if ($values[$i] !~ /^\s*$/) {
  119: 	    $style_for_target{$keys[$i]}=$values[$i]; 
  120: 	}
  121:     }
  122:     return %style_for_target; 
  123: }
  124: 
  125: 
  126: sub testkey {
  127: 
  128:     my ($zeroth,$first,@keys) = @_; 
  129:     my $number = -1;
  130:     if ($zeroth eq 'S') {
  131: 	for (my $i=$#keys; $i>=0; $i=$i-1) {
  132: 	    if ($first eq lc($keys[$i]))  { 
  133: 		$number = $i;
  134: 		last;
  135: 	    }
  136: 	}
  137:     } elsif ($zeroth eq 'E') {
  138: 	for (my $i=$#keys; $i>=0; $i=$i-1) {
  139: 	    if ('/'.$first eq lc($keys[$i]))  { 
  140: 		$number = $i;
  141: 	 	last;
  142: 	    }
  143: 	}
  144:     }
  145: 	return $number;
  146: }
  147: 
  148: sub testvalue {
  149: 
  150:     my ($number,$zeroth,$second,@values) = @_;   
  151:     my $current_content = $values[$number];
  152:     if ($zeroth eq 'S') {
  153: 	my %tempo_hash = %$second;
  154: 	while ((my $current_k,my $current_v) = each %tempo_hash) {
  155: 	    $current_content =~ s/\$$current_k/$current_v/g;
  156: 	}
  157:     } elsif ($zeroth eq 'E') {
  158: 	$current_content = $values[$number];
  159:     }
  160:     return $current_content;
  161: }
  162: 
  163: 1;
  164: 
  165: __END__
  166: 
  167: =pod
  168: 
  169: =head1 NAME
  170: 
  171: Apache::style.pm
  172: 
  173: =head1 SYNOPSIS
  174: 
  175: Style parsing module
  176: 
  177: This is part of the LearningOnline Network with CAPA project
  178: described at http://www.lon-capa.org.
  179: 
  180: 
  181: =head1 SUBROUTINES
  182: 
  183: =over
  184: 
  185: =item styleparser()
  186: 
  187: =item testkey()
  188: 
  189: =item testvalue()
  190: 
  191: =back
  192: 
  193: =cut
  194: