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    1: # The LearningOnline Network with CAPA
    2: # Interface routines for Aspell
    3: #
    4: # $Id: lonspeller.pm,v 1.6 2004/07/27 23:35:34 www 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: ######################################################################
   29: ######################################################################
   30: 
   31: package Apache::lonspeller;
   32: 
   33: use Apache::Constants qw(:common);
   34: use Text::Aspell;
   35: use Apache::lonlocal;
   36: use HTML::LCParser;
   37: use strict;
   38: 
   39: my $speller;
   40: my $insidelink;
   41: 
   42: sub spellcheck_language {
   43:     if ($ENV{'form.lang'}) { return $ENV{'form.lang'}; }
   44:     if (&mt('spellcheck_lang') ne 'spellcheck_lang') {
   45: 	return &mt('spellcheck_lang');
   46:     }
   47:     return 'en_US';
   48: }
   49: 
   50: sub set_language {
   51:     my $lang=&spellcheck_language();
   52:     $speller->set_option('lang',$lang);
   53: }
   54: 
   55: sub textsection {
   56:     my $input=shift;
   57:     my $output='';
   58:     &set_language();
   59:     foreach my $word (split(/\b/,$input)) {
   60: 	if (($word=~/\W/) || ($word=~/^(lt|gt|nbsp|amp)$/i)
   61: 	    || ($speller->check($word))) {
   62: 	    $output.=$word;
   63: 	} else {
   64: 	    my $suggestions=join(' ',$speller->suggest($word));
   65: 	    $suggestions=~s/\'/\\\'/gs;
   66: 	    if (($suggestions) && (!$insidelink)) {
   67: 		$output.='<a href="javascript:alert('."'".
   68: 		    $suggestions."');".
   69: 		    '">';
   70: 	    }
   71: 	    $output.='<font color="red">'.$word.'</font>';
   72: 	    if (($suggestions) && (!$insidelink)) { $output.='</a>'; }
   73: 	}
   74:     }
   75:     return $output;
   76: }
   77: 
   78: 
   79: sub markeduptext {
   80:     my $input=shift;
   81:     my $output='';
   82:     my $parser=HTML::LCParser->new(\$input);
   83:     $insidelink=0;
   84:     my $token;
   85:     while ($token=$parser->get_token) {
   86: 	if ($token->[0] eq 'T') {
   87: 	    $output.=&textsection($token->[1]);
   88: 	} elsif ($token->[0] eq 'S') {
   89: 	    $output.=$token->[4];
   90: 	    foreach my $tag ('m','script') {
   91: 		if ($token->[1] eq $tag) {
   92: 		    $output.=$parser->get_text('/'.$tag);
   93: 		}
   94: 	    }
   95: 	    if ($token->[1] eq 'a') {
   96: 		$insidelink=1;
   97: 	    }
   98: 	} elsif ($token->[0] eq 'E') {
   99: 	    $output.=$token->[2];
  100: 	    if ($token->[1] eq 'a') {
  101: 		$insidelink=0;
  102: 	    }
  103: 	}
  104:     }
  105:     $insidelink=0;
  106:     return $output;
  107: }
  108: 
  109: sub initspeller {
  110:     unless (defined($speller)) {
  111: 	$speller = Text::Aspell->new;
  112: 	$speller->set_option('lang','en_US');
  113:     }
  114:     $insidelink=0;
  115: }
  116: 
  117: sub handler {
  118:     my $r = shift;
  119:     &Apache::loncommon::content_type($r,'text/html');
  120:     $r->send_http_header;
  121:     return OK if $r->header_only;
  122: 
  123:     &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'});
  124: 
  125:     &initspeller();
  126:     $r->print('<html><head><title>'.
  127: 	      &mt('Spell Checker').
  128: 	      '</title></head><body bgcolor="#DDDDDD">'.
  129: 	      &markeduptext($ENV{'form.text'}).
  130: 	      '</body></html>');
  131:     return OK;
  132: }
  133: 
  134: BEGIN {
  135:     &initspeller();
  136: }
  137: 
  138: 1;
  139: 
  140: __END__