source: main/trunk/greenstone2/perllib/plugins/PowerPointPlugin.pm@ 22853

###########################################################################
#
# PowerPointPlugin.pm -- plugin for importing Microsoft PowerPoint files.
#  (basic version supports versions 95 and 97)
#  (through OpenOffice extension, supports all contempoary formats)
#
# 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 PowerPointPlugin;

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

use gsprintf 'gsprintf';

use AutoloadConverterScripting;

@PowerPointPlugin::ISA = ('AutoloadConverterScripting');


my $windows_convert_to_list =
    [ { 'name' => "auto",
    'desc' => "{ConvertBinaryFile.convert_to.auto}" },
      { 'name' => "html",
    'desc' => "{ConvertBinaryFile.convert_to.html}" },
      { 'name' => "text",
    'desc' => "{ConvertBinaryFile.convert_to.text}" },
      { 'name' => "pagedimg_jpg",
    'desc' => "{ConvertBinaryFile.convert_to.pagedimg_jpg}" },
      { 'name' => "pagedimg_gif",
    'desc' => "{ConvertBinaryFile.convert_to.pagedimg_gif}" },
      { 'name' => "pagedimg_png",
    'desc' => "{ConvertBinaryFile.convert_to.pagedimg_png}" }
      ];

my $arguments = 
    [ { 'name' => "process_exp",
    'desc' => "{BasePlugin.process_exp}",
    'type' => "regexp",
    'reqd' => "no",
    'deft' => "&get_default_process_exp(\$self)",  # delayed (see below)
    }
      ];

my $opt_windows_args = 
    [ { 'name' => "convert_to",
    'desc' => "{ConvertBinaryFile.convert_to}",
    'type' => "enum",
    'reqd' => "yes",
    'list' => $windows_convert_to_list, 
    'deft' => "html" },
      { 'name' => "windows_scripting",
    'desc' => "{PowerPointPlugin.windows_scripting}",
    'type' => "flag",
    'reqd' => "no" }
      ];

my $options = { 'name'     => "PowerPointPlugin",
        'desc'     => "{PowerPointPlugin.desc}",
        'abstract' => "no",
        'inherits' => "yes",
        'srcreplaceable' => "yes", # Source docs in PPT format can be replaced with GS-generated html
            'args'     => $arguments };

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

    if ($ENV{'GSDLOS'} =~ m/^windows$/i) {
    push(@$arguments,@$opt_windows_args);
    }

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


    my $self 
    = new AutoloadConverterScripting("OpenOfficeConverter",
                     $pluginlist, $inputargs, 
                     $hashArgOptLists);


    # plugin's process_exp can only be correctly determined once autoloading
    # has taken place
    my $plug_options = $self->{'option_list'}->[0];
    my $plug_args = $plug_options->{'args'};
    
    foreach my $a (@$plug_args) {
    # consider changing this to search for all values that are
    # tagged as 'deft-delayed' = 1 ?!?

    if ($a->{'name'} eq "process_exp") {
        my $eval_expr = $a->{'deft'};
        $a->{'deft'} = eval "$eval_expr";

        # Now see if process_exp needs updating
        my $process_exp = $self->{'process_exp'};
        if (!$self->{'info_only'} && ($process_exp eq $eval_expr)) {
        # process_exp is only defined if not 'info_only'
        #
        # if it does exist and it equals the unevaluated $eval_expr
        # then it was set to the default (rather than overriden by
        # the collect.cfg file)

        $self->{'process_exp'} = $a->{'deft'};
        }
    }
    }

 
    if ($self->{'info_only'}) {
    # don't worry about any options etc
    return bless $self, $class;
    }

    $self->{'filename_extension'} = "ppt";
    $self->{'file_type'} = "PPT";

    if ($self->{'convert_to'} eq "auto") {
    if ($self->{'windows_scripting'}) {
        $self->{'convert_to'} = "pagedimg_jpg";
    }
    else {
        $self->{'convert_to'} = "html";
    }
    }

   my $outhandle = $self->{'outhandle'};

    # can't have windows_scripting and openoffice_scripting at the same time
    if ($self->{'windows_scripting'} && $self->{'openoffice_scripting'}) {
    print $outhandle "Warning: Cannot have -windows_scripting and -openoffice_scripting\n";
    print $outhandle "         on at the same time.  Defaulting to -windows_scripting\n";
    $self->{'openoffice_scripting'} = 0;
    }
    
    #these are passed through to gsConvert.pl by ConvertBinaryFile.pm
    $self->{'convert_options'} = "-windows_scripting" if $self->{'windows_scripting'};

    # set convert_to_plugin and convert_to_ext
    $self->set_standard_convert_settings();

    my $secondary_plugin_name = $self->{'convert_to_plugin'};
    my $secondary_plugin_options = $self->{'secondary_plugin_options'};

    if (!defined $secondary_plugin_options->{$secondary_plugin_name}) {
    $secondary_plugin_options->{$secondary_plugin_name} = [];
    }
    my $specific_options = $secondary_plugin_options->{$secondary_plugin_name};

    push(@$specific_options, "-file_rename_method", "none");
    push(@$specific_options, "-extract_language") if $self->{'extract_language'};

    if ($secondary_plugin_name eq "HTMLPlugin") {
    push(@$specific_options, "-processing_tmp_files");
    push(@$specific_options,"-metadata_fields","Title,GENERATOR,date,author<Creator>");
    }
    elsif ($secondary_plugin_name eq "PagedImagePlugin") {
    push(@$specific_options, "-processing_tmp_files");
    #is this true??
    push(@$specific_options,"-input_encoding", "utf8");
    }

    $self = bless $self, $class;

    $self->load_secondary_plugins($class,$secondary_plugin_options,$hashArgOptLists);
    return $self;
}

sub get_default_process_exp {
    my $self = shift (@_);

    if ($self->{'scripting_ext_working'}) {
    return q^(?i)\.(ppt|pptx|odp)$^;
    }

    return q^(?i)\.ppt$^;
}

1;