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PARDUS / Zoidberg-0.1b-unstable / StringParse / Syntax / Syntax.pm 

            

              
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package Zoidberg::StringParse::Syntax;
our $VERSION = '0.1';
use strict;
use Term::ANSIColor;
use base 'Zoidberg::StringParse';
sub parse {
        #args: $string or [@strings], optional: gram_name
        my $self = shift;
        my $string_or_ref = shift;
        my $gram = shift || $self->{default};
        my ($no_error_bit, $no_modify) = @_;
        unless (ref($string_or_ref) eq 'ARRAY') { $string_or_ref = [$string_or_ref]; }
        $self->flush; # for non flushing use parse_string
        unless ($gram eq $self->{last}) {
                $self->{last} = $gram;
                $self->prepare_gram;
        }
        #print "Debug: using gram: $gram"; print $self->{collection}{$self->{last}} ? "--this exists\n" : "\n";
        foreach my $string (@{$string_or_ref}) { $self->parse_string($string); }
        if ($self->{collection}{$self->{last}}{pre_rules_code}) { eval($self->{collection}{$self->{last}}{pre_rules_code}); };
        $self->parse_rules($self->{collection}{$self->{last}}{default_color}, $no_error_bit, $no_modify);
        if ($self->{collection}{$self->{last}}{post_rules_code}) { eval($self->{collection}{$self->{last}}{post_rules_code}); };
        return $self->stringify;
}
sub stringify {
        my $self = shift;
        my $string = '';
        foreach my $block (@{$self->{tree}}) {
                #print 'debug: '.join('--', @{$block})."\n";
                if ( ($block->[2]) && (grep {$block->[2] =~ /^$_$/i} @{$self->{ansi_colors}}) ) {
                        #print "debug: is ansi\n";
                        $string .= color(lc($block->[2])).$block->[0].color('reset');
                        unless (($block->[1] eq 'END') || ($block->[1] eq 'BROKEN')) {
                                $string .= $block->[1];
                        }
                }
                else {
                        $string .= $block->[0];
                        unless (($block->[1] eq 'END') || ($block->[1] eq 'BROKEN')) {
                                $string .= $block->[1];
                        }
                }
        }
        return $string;
}
sub gen_rules {
        my $self = shift;
        if ($self->{collection}{$self->{last}}{colors}) {
                foreach my $color (keys %{$self->{collection}{$self->{last}}{colors}}) {
                        my $exp = '('.join('|', @{$self->{collection}{$self->{last}}{colors}{$color}}).')';
                        unshift @{$self->{collection}{$self->{last}}{rules}}, ['^'.$exp.'$', $color];
                }
        }
}
sub prepare_gram {
        my $self = shift;
        if (@_) { $self->{ansi_colors} = shift; }
        unless ($self->{collection}{$self->{last}}{expr}) { $self->gen_expr; }
        unless ($self->{collection}{$self->{last}}{made_rules}) {
                $self->gen_rules;
                $self->{collection}{$self->{last}}{made_rules} = 1;
        }
}
1;
__END__
=head1 NAME
Zoidberg::StringParse::Syntax use StringParse for Syntax Highlighting
=head1 SYNOPSIS
  use Zoidberg::StringParse::Syntax;
  my $parser = Zoidberg::StringParse::Syntax->new;
  my $string = 'some string';
  my $colored_string = $parser->parse($string);
=head1 ABSTRACT
  This module does syntax highlighting for Zoidberg
=head1 DESCRIPTION
This subclass of Zoidberg::StringParse manipulates its parent
class to be usefull for syntax highlighting.
It uses Term::ANSIColor for the actual highlighting.
=head2 EXPORT
None by default.
=head1 METHODS
=head2 new()
  Simple constructor, you can suppply a custom grammar as arg.
=head2 parse($string)
  Returns highlighted version of $string.
=head1 AUTHOR
Jaap Karssenberg || Pardus [Larus] E<lt>j.g.karssenberg@student.utwente.nlE<gt>
R.L. Zwart, E<lt>carlos@caremail.nlE<gt>
Copyright (c) 2002 Jaap G Karssenberg. All rights reserved.
This program is free software; you can redistribute it and/or
modify it under the same terms as Perl itself.
=head1 SEE ALSO
L<perl>
L<Zoidberg>
L<Zoidberg::StringParse>
http://zoidberg.sourceforge.net.
=cut