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# $Id: ITextParser.pm,v 1.19 2008/06/03 17:31:15 cmungall Exp $
#
# Copyright (C) 2002 Chris Mungall <cjm@fruitfly.org>
#
# See also - http://stag.sourceforge.net
#
# This module is free software.
# You may distribute this module under the same terms as perl itself
package Data::Stag::ITextParser;
=head1 NAME
ITextParser.pm - parses stag IText format into stag events
=head1 SYNOPSIS
=cut
=head1 DESCRIPTION
=head1 AUTHOR
=cut
use Exporter;
use Carp;
use FileHandle;
use strict;
use base qw(Data::Stag::BaseGenerator Exporter);
use vars qw($VERSION);
$VERSION="0.14";
sub fmtstr {
return 'itext';
}
sub parse_fh {
my $self = shift;
my $fh = shift;
my @stack = ();
my $txt;
while(<$fh>) {
chomp;
s/\\\#/MAGIC_WORD_HASH/g;
s/\#.*//;
s/MAGIC_WORD_HASH/\#/g;
next unless $_;
# remove trailing ws
s/\s*$//;
my $eofre = '\<\<(\S+)' . "\$";
if (/$eofre/) {
my $eof = $1;
s/$eofre//;
my $sofar = $_;
while (<$fh>) {
last if /^$eof/;
$sofar .= $_;
}
$_ = $sofar;
}
# get indent level
/(\s*)(.*)/s;
my ($indent_txt, $elt) = ($1, $2);
my $indent = length($indent_txt);
if ($elt =~ /^([\w\-\+\?\*]+):\s*(.*)$/s ||
$elt =~ /^([\@\.]):\s*(.*)$/s) {
$elt = $1;
my $nu_txt = $2;
$self->pop_to_level($indent, $txt, \@stack);
$txt = undef;
if ($nu_txt || length($nu_txt)) {
$txt = $nu_txt;
}
$self->start_event($elt);
push(@stack, [$indent, $elt]);
}
else {
# body
$txt .= $elt if $elt;
}
}
$fh->close;
$self->pop_to_level(0, $txt, \@stack);
return;
}
sub pop_to_level {
my $self = shift;
my $indent = shift;
my $txt = shift;
my $stack = shift;
# if buffered pcdata, export it
if (defined $txt) {
# unescape :s
$txt =~ s/^\\:/:/g;
$txt =~ s/([^\\])\\:/$1:/g;
$self->evbody($txt);
}
while (scalar(@$stack) &&
$stack->[-1]->[0] >= $indent) {
$self->end_event($stack->[-1]->[1]);
pop(@$stack);
}
return;
}
1;
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