###########################################################################
#
# PPTPlug.pm -- plugin for importing Microsoft PowerPoint files.
#  (currently only versions 95 and 97)
#
# A component of the Greenstone digital library software
# from the New Zealand Digital Library Project at the 
# University of Waikato, New Zealand.
#
# Copyright (C) 2002 New Zealand Digital Library Project
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
#
###########################################################################

package PPTPlug;

use ConvertToPlug;
use strict;
no strict 'refs'; # allow filehandles to be variables and viceversa

sub BEGIN {
    @PPTPlug::ISA = ('ConvertToPlug');
}

my $arguments = 
    [ { 'name' => "process_exp",
	'desc' => "{BasPlug.process_exp}",
	'type' => "regexp",
	'reqd' => "no",
	'deft' => &get_default_process_exp() },
      ];

my $options = { 'name'     => "PPTPlug",
		'desc'     => "{PPTPlug.desc}",
		'abstract' => "no",
		'inherits' => "Yes",
	        'args'     => $arguments };

sub new {
    my ($class) = shift (@_);
    my ($pluginlist,$inputargs,$hashArgOptLists) = @_;
    push(@$pluginlist, $class);

    if(defined $arguments){ push(@{$hashArgOptLists->{"ArgList"}},@{$arguments});}
    if(defined $options) { push(@{$hashArgOptLists->{"OptList"}},$options)};

    my $self = (defined $hashArgOptLists)? new ConvertToPlug($pluginlist,$inputargs,$hashArgOptLists): new ConvertToPlug($pluginlist,$inputargs);

    # ppthtml outputs utf-8 already.
    if ($self->{'input_encoding'} eq "auto") {
	$self->{'input_encoding'} = "utf8";
    }

    return bless $self, $class;
}

sub get_default_process_exp {
    my $self = shift (@_);
    return q^(?i)\.ppt$^;
}
    
sub process {
    my $self = shift (@_);

    my $outhandle = $self->{'outhandle'};
    print $outhandle "PPTPlug: passing $_[3] on to $self->{'converted_to'}Plug\n"
	if $self->{'verbosity'} > 1;
    print STDERR "<Processing n='$_[3]' p='PPTPlug'>\n" if ($_[6]);

    return ConvertToPlug::process_type($self,"ppt",@_);
}

1;
