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package Tk::CodeText::Pod;
use vars qw($VERSION);
$VERSION = '0.2';
use strict;
use base 'Tk::CodeText::Template';
sub new {
my ($proto, $rules) = @_;
my $class = ref($proto) || $proto;
if (not defined($rules)) {
$rules = [
['Text'],
['Bold', -foreground => 'purple'],
['Italic', -foreground => 'purple'],
['Exact', -foreground => 'brown'],
['Command', -foreground => 'orange'],
['Space', -background => 'beige'],
['Tab', -background => 'pale green'],
];
};
my $self = $class->SUPER::new($rules);
bless ($self, $class);
$self->listAdd('specchars', 'B', 'I');
$self->listAdd('specmodes', 'Bold', 'Italic');
$self->stackPush('Text');
return $self;
}
sub highlight {
my ($hlt, $in) = @_;
$hlt->snippetParse;
my $out = $hlt->out;
@$out = ();
my $first = substr($in, 0, 1);
if (substr($in, 0, 5) eq '=head') {
#head mode
$hlt->snippet($in);
$hlt->tokenParse('Command');
} elsif ($first eq '=') {
#command mode
$in =~ /(=[^\s]+)/g;
$hlt->snippet($1);
$hlt->tokenParse('Command');
$hlt->parseText(substr($in, length($1), length($in) - length($1)));
} elsif (($first eq "\t") or ($first eq ' ')) {
#exact mode
$in =~ /(^[^\S]+)/g;
my @sp = split //, $1;
while (@sp) {
my $k = shift @sp;
if ($k eq " ") {
$hlt->snippet($k);
$hlt->tokenParse('Space');
} elsif ($k eq "\t") {
$hlt->snippet($k);
$hlt->tokenParse('Tab');
}
}
$hlt->tokenParse('Command');
$hlt->snippet(substr($in, length($1), length($in) - length($1)));
$hlt->tokenParse('Exact');
} else {
#text mode
$hlt->parseText($in);
}
return @$out;
}
sub parseText {
my $hlt = shift;
my @c = split //, shift;
while (@c) {
my $t = shift @c;
if ($hlt->tokenTest($t, 'specchars')) {
if ((@c) and ($c[0] eq '<')) {
if ($t eq 'B') {
$hlt->snippetParse;
$hlt->snippetAppend($t);
$hlt->stackPush('Bold');
} elsif ($t eq 'I') {
$hlt->snippetParse;
$hlt->snippetAppend($t);
$hlt->stackPush('Italic');
} else {
$hlt->snippetAppend($t);
}
} else {
$hlt->snippetAppend($t);
}
} elsif ($t eq '>') {
if ($hlt->tokenTest($hlt->stackTop, 'specmodes')) {
$hlt->snippetAppend($t);
$hlt->snippetParse;
$hlt->stackPull;
}
} else {
$hlt->snippetAppend($t);
}
};
$hlt->snippetParse;
}
1;
__END__
=head1 NAME
Tk::CodeText::Pod - a Plugin for syntax highlighting of pod files.
=head1 SYNOPSIS
require Tk::CodeText::Pod;
my $sh = new Tk::CodeText::Pod([
['Text'],
['Bold', -font => [-weight => 'bold']],
['Italic', -font => [-slant => 'italic']],
['Exact', -foreground => 'brown'],
['Command', -foreground => 'orange'],
['Space', -background => 'beige'],
['Tab', -background => 'pale green'],
]);
=head1 DESCRIPTION
Tk::CodeText::Pod is a plugin module that provides syntax highlighting
for pod files to a Tk::CodeText text widget.
It inherits Tk::CodeText::Template. See also there.
=head1 METHODS
=over 4
=item B<highlight>(I<$string>);
returns a list of string snippets and tags that can be inserted
in a Tk::Text like widget instantly.
=item B<syntax>
returns 'Pod'.
=back
=cut
=head1 AUTHOR
Hans Jeuken (haje@toneel.demon.nl)
=cut
=head1 BUGS
Unknown
=cut
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