| 1 | ###########################################################################
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| 2 | #
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| 3 | # ConvertToPlug.pm -- plugin that inherits from BasPlug
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| 4 | #
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| 5 | # A component of the Greenstone digital library software
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| 6 | # from the New Zealand Digital Library Project at the
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| 7 | # University of Waikato, New Zealand.
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| 8 | #
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| 9 | # Copyright (C) 1999 New Zealand Digital Library Project
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| 10 | #
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| 11 | # This program is free software; you can redistribute it and/or modify
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| 12 | # it under the terms of the GNU General Public License as published by
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| 13 | # the Free Software Foundation; either version 2 of the License, or
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| 14 | # (at your option) any later version.
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| 15 | #
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| 16 | # This program is distributed in the hope that it will be useful,
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| 17 | # but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 18 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 19 | # GNU General Public License for more details.
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| 20 | #
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| 21 | # You should have received a copy of the GNU General Public License
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| 22 | # along with this program; if not, write to the Free Software
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| 23 | # Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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| 24 | #
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| 25 | ###########################################################################
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| 26 |
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| 27 | # This plugin is inherited by such plugins as WordPlug, PPTPlug, PSPlug, RTFPlug
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| 28 | # and PDFPlug. It facilitates the conversion of these document types to either
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| 29 | # HTML, Text or auto (allow user to choose which format to convert to).
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| 30 | # It works by dynamically inheriting BasPlug and base on the plugin type in
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| 31 | # secondary_plugins to devide which format to 'convert_to'. If the argument is
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| 32 | # not present, the default is to inherit auto.
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| 33 | package ConvertToPlug;
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| 34 |
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| 35 | use BasPlug;
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| 36 | use ghtml;
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| 37 | use HTMLPlug;
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| 38 | use TEXTPlug;
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| 39 | use PagedImgPlug;
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| 40 |
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| 41 | use strict;
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| 42 | no strict 'refs'; # allow filehandles to be variables and viceversa
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| 43 |
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| 44 | sub BEGIN {
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| 45 | @ConvertToPlug::ISA = ('BasPlug');
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| 46 | }
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| 47 |
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| 48 | my $convert_to_list =
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| 49 | [ { 'name' => "auto",
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| 50 | 'desc' => "{ConvertToPlug.convert_to.auto}" },
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| 51 | { 'name' => "html",
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| 52 | 'desc' => "{ConvertToPlug.convert_to.html}" },
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| 53 | { 'name' => "text",
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| 54 | 'desc' => "{ConvertToPlug.convert_to.text}" }
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| 55 | ];
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| 56 |
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| 57 | my $arguments =
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| 58 | [ { 'name' => "convert_to",
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| 59 | 'desc' => "{ConvertToPlug.convert_to}",
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| 60 | 'type' => "enum",
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| 61 | 'reqd' => "yes",
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| 62 | 'list' => $convert_to_list,
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| 63 | 'deft' => "auto" },
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| 64 | { 'name' => "title_sub",
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| 65 | 'desc' => "{HTMLPlug.title_sub}",
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| 66 | 'type' => "string",
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| 67 | #'type' => "regexp",
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| 68 | 'deft' => "" },
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| 69 | { 'name' => "apply_fribidi",
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| 70 | 'desc' => "{ConvertToPlug.apply_fribidi}",
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| 71 | 'type' => "flag",
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| 72 | 'reqd' => "no" },
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| 73 | { 'name' => "use_strings",
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| 74 | 'desc' => "{ConvertToPlug.use_strings}",
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| 75 | 'type' => "flag",
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| 76 | 'reqd' => "no" },
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| 77 | { 'name' => "extract_keyphrases",
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| 78 | 'desc' => "{BasPlug.extract_keyphrases}",
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| 79 | 'type' => "flag",
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| 80 | 'reqd' => "no",
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| 81 | 'hiddengli' => "yes" },
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| 82 | { 'name' => "extract_keyphrase_options",
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| 83 | 'desc' => "{BasPlug.extract_keyphrase_options}",
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| 84 | 'type' => "string",
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| 85 | 'reqd' => "no",
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| 86 | 'hiddengli' => "yes" } ];
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| 87 |
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| 88 | my $options = { 'name' => "ConvertToPlug",
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| 89 | 'desc' => "{ConvertToPlug.desc}",
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| 90 | 'abstract' => "yes",
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| 91 | 'inherits' => "yes",
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| 92 | 'args' => $arguments };
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| 93 |
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| 94 |
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| 95 | sub load_secondary_plugins
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| 96 | {
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| 97 | my $self = shift (@_);
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| 98 | my ($class,$input_args,$hashArgOptLists) = @_;
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| 99 |
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| 100 | my @convert_to_list = split(",",$self->{'convert_to'});
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| 101 | my $secondary_plugins = {};
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| 102 |
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| 103 | foreach my $convert_to (@convert_to_list) {
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| 104 | # load in "convert_to" plugin package
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| 105 | my $plugin_class = $convert_to."Plug";
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| 106 | my $plugin_package = $plugin_class.".pm";
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| 107 |
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| 108 | require $plugin_package;
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| 109 |
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| 110 | # call its constructor with extra options that we've worked out!
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| 111 | my $arglist = $input_args->{$plugin_class};
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| 112 | # my $secondary_plugin = new $plugin_class([],$arglist, $hashArgOptLists);
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| 113 | # secondary plugins don';t need to know their calling plugin's options
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| 114 | my $secondary_plugin = new $plugin_class([],$arglist);
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| 115 | $secondary_plugins->{$plugin_class} = $secondary_plugin;
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| 116 | }
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| 117 | $self->{'secondary_plugins'} = $secondary_plugins;
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| 118 | }
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| 119 |
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| 120 | sub new {
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| 121 | my ($class) = shift (@_);
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| 122 | my ($pluginlist,$inputargs,$hashArgOptLists) = @_;
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| 123 | push(@$pluginlist, $class);
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| 124 | my $classPluginName = (defined $pluginlist->[0]) ? $pluginlist->[0] : $class;
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| 125 | if(defined $arguments){ push(@{$hashArgOptLists->{"ArgList"}},@{$arguments});}
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| 126 | if(defined $options) { push(@{$hashArgOptLists->{"OptList"}},$options)};
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| 127 |
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| 128 | my $self = (defined $hashArgOptLists)? new BasPlug($pluginlist,$inputargs,$hashArgOptLists): new BasPlug($pluginlist,$inputargs);
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| 129 |
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| 130 | my $convert_to_type = $self->{'convert_to'};
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| 131 | if (!defined $convert_to_type || $convert_to_type eq "") {
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| 132 | $convert_to_type = "auto";
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| 133 | }
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| 134 | my $windows_scripting = $self->{'windows_scripting'};
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| 135 | if ($classPluginName eq "PDFPlug") {
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| 136 | if ($convert_to_type eq "text" &&
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| 137 | $ENV{'GSDLOS'} =~ /^windows$/i) {
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| 138 | print STDERR "Windows does not support pdf to text. PDFs will be converted to HTML instead\n";
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| 139 | $convert_to_type = "html";
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| 140 | }
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| 141 | } elsif ($classPluginName eq "WordPlug") {
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| 142 | if (defined $self->{'windows_scripting'} && $ENV{'GSDLOS'} =~ /^windows$/i && $convert_to_type =~ /^(html|auto)$/) {
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| 143 | # we use structured HTML, not normal html
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| 144 | $convert_to_type = "structuredhtml";
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| 145 | }
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| 146 | } elsif ($classPluginName eq "PPTPlug") {
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| 147 | if (defined $self->{'windows_scripting'} && $ENV{'GSDLOS'} =~ /^windows$/i && $convert_to_type eq "auto") {
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| 148 | # we use paged img
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| 149 | $convert_to_type = "pagedimg_jpg";
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| 150 | }
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| 151 | } elsif ($classPluginName eq "PSPlug") {
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| 152 | if ($convert_to_type eq "auto") {
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| 153 | # we use text
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| 154 | $convert_to_type = "text";
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| 155 | }
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| 156 | }
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| 157 |
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| 158 | if ($convert_to_type eq "auto") {
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| 159 | # choose html for now - should choose a format based on doc type
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| 160 | $convert_to_type = "html";
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| 161 | }
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| 162 |
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| 163 | if ($convert_to_type eq "html") {
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| 164 | $self->{'convert_to'} = "HTML";
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| 165 | $self->{'convert_to_ext'} = "html";
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| 166 | } elsif ($convert_to_type eq "text") {
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| 167 | $self->{'convert_to'} = "TEXT";
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| 168 | $self->{'convert_to_ext'} = "txt";
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| 169 | } elsif ($convert_to_type eq "structuredhtml") {
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| 170 | $self->{'convert_to'} = "StructuredHTML";
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| 171 | $self->{'convert_to_ext'} = "html";
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| 172 | } elsif ($convert_to_type =~ /^pagedimg/) {
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| 173 | $self->{'convert_to'} = "PagedImg";
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| 174 | my ($convert_to_ext) = $convert_to_type =~ /pagedimg\_(jpg|gif|png)/i;
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| 175 | $convert_to_ext = 'jpg' unless defined $convert_to_ext;
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| 176 | $self->{'convert_to_ext'} = $convert_to_ext;
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| 177 | }
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| 178 |
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| 179 | return bless $self, $class;
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| 180 | }
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| 181 |
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| 182 |
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| 183 | sub init {
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| 184 | my $self = shift (@_);
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| 185 | my ($verbosity, $outhandle, $failhandle) = @_;
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| 186 |
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| 187 | $self->SUPER::init($verbosity,$outhandle,$failhandle);
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| 188 |
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| 189 | my $secondary_plugins = $self->{'secondary_plugins'};
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| 190 |
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| 191 | foreach my $plug_name (keys %$secondary_plugins) {
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| 192 | my $plugin = $secondary_plugins->{$plug_name};
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| 193 | $plugin->init($verbosity,$outhandle,$failhandle);
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| 194 | }
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| 195 | }
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| 196 |
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| 197 | sub deinit {
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| 198 | # called only once, after all plugin passes have been done
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| 199 |
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| 200 | my ($self) = @_;
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| 201 |
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| 202 | my $secondary_plugins = $self->{'secondary_plugins'};
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| 203 |
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| 204 | foreach my $plug_name (keys %$secondary_plugins) {
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| 205 | my $plugin = $secondary_plugins->{$plug_name};
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| 206 | $plugin->deinit();
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| 207 | }
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| 208 | }
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| 209 |
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| 210 | sub convert_post_process
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| 211 | {
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| 212 | # by default do no post processing
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| 213 | return;
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| 214 | }
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| 215 |
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| 216 |
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| 217 | # Run conversion utility on the input file.
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| 218 | #
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| 219 | # The conversion takes place in a collection specific 'tmp' directory so
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| 220 | # that we don't accidentally damage the input.
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| 221 | #
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| 222 | # The desired output type is indicated by $output_ext. This is usually
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| 223 | # something like "html" or "word", but can be "best" (or the empty string)
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| 224 | # to indicate that the conversion utility should do the best it can.
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| 225 | sub tmp_area_convert_file {
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| 226 | my $self = shift (@_);
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| 227 | my ($output_ext, $input_filename, $textref) = @_;
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| 228 |
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| 229 | my $outhandle = $self->{'outhandle'};
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| 230 | my $convert_to = $self->{'convert_to'};
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| 231 | my $failhandle = $self->{'failhandle'};
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| 232 | my $convert_to_ext = $self->{'convert_to_ext'};
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| 233 |
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| 234 | # softlink to collection tmp dir
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| 235 | my $tmp_dirname
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| 236 | = &util::filename_cat($ENV{'GSDLCOLLECTDIR'}, "tmp");
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| 237 | &util::mk_dir($tmp_dirname) if (!-e $tmp_dirname);
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| 238 |
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| 239 | # derive tmp filename from input filename
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| 240 | my ($tailname, $dirname, $suffix)
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| 241 | = &File::Basename::fileparse($input_filename, "\\.[^\\.]+\$");
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| 242 |
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| 243 | # Remove any white space from filename -- no risk of name collision, and
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| 244 | # makes later conversion by utils simpler. Leave spaces in path...
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| 245 | # tidy up the filename with space, dot, hyphen between
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| 246 | $tailname =~ s/\s+//g;
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| 247 | $tailname =~ s/\.+//g;
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| 248 | $tailname =~ s/\-+//g;
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| 249 | $suffix = lc($suffix);
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| 250 | my $tmp_filename = &util::filename_cat($tmp_dirname, "$tailname$suffix");
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| 251 | &util::soft_link($input_filename, $tmp_filename);
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| 252 | my $verbosity = $self->{'verbosity'};
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| 253 | if ($verbosity > 0) {
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| 254 | print $outhandle "Converting $tailname$suffix to $convert_to format\n";
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| 255 | }
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| 256 |
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| 257 | my $errlog = &util::filename_cat($tmp_dirname, "err.log");
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| 258 |
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| 259 | # Execute the conversion command and get the type of the result,
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| 260 | # making sure the converter gives us the appropriate output type
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| 261 | my $output_type="";
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| 262 | if ($convert_to =~ m/PagedImg/i) {
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| 263 | $output_type = lc($convert_to)."_".lc($convert_to_ext);
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| 264 | } else {
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| 265 | $output_type = lc($convert_to);
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| 266 | }
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| 267 |
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| 268 | my $cmd = "perl -S gsConvert.pl -verbose $verbosity ";
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| 269 | if (defined $self->{'convert_options'}) {
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| 270 | $cmd .= $self->{'convert_options'} . " ";
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| 271 | }
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| 272 | if ($self->{'use_strings'}) {
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| 273 | $cmd .= "-use_strings ";
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| 274 | }
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| 275 | $cmd .= "-errlog \"$errlog\" -output $output_type \"$tmp_filename\"";
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| 276 |
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| 277 | $output_type = `$cmd`;
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| 278 |
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| 279 | # remove symbolic link to original file
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| 280 | &util::rm($tmp_filename);
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| 281 |
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| 282 | # Check STDERR here
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| 283 | chomp $output_type;
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| 284 | if ($output_type eq "fail") {
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| 285 | print $outhandle "Could not convert $tailname$suffix to $convert_to format\n";
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| 286 | print $failhandle "$tailname$suffix: " . ref($self) . " failed to convert to $convert_to\n";
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| 287 | # The following meant that if a conversion failed, the document would be counted twice - do we need it for anything?
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| 288 | #$self->{'num_not_processed'} ++;
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| 289 | if (-s "$errlog") {
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| 290 | open(ERRLOG, "$errlog");
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| 291 | while (<ERRLOG>) {
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| 292 | print $outhandle "$_";
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| 293 | }
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| 294 | print $outhandle "\n";
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| 295 | close ERRLOG;
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| 296 | }
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| 297 | &util::rm("$errlog") if (-e "$errlog");
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| 298 | return "";
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| 299 | }
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| 300 |
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| 301 | # store the *actual* output type and return the output filename
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| 302 | # it's possible we requested conversion to html, but only to text succeeded
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| 303 | #$self->{'convert_to_ext'} = $output_type;
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| 304 | if ($output_type =~ /html/i) {
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| 305 | $self->{'converted_to'} = "HTML";
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| 306 | } elsif ($output_type =~ /te?xt/i) {
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| 307 | $self->{'converted_to'} = "TEXT";
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| 308 | } elsif ($output_type =~ /item/i){
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| 309 | $self->{'converted_to'} = "PagedImg";
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| 310 | }
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| 311 |
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| 312 | my $output_filename = $tmp_filename;
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| 313 | if ($output_type =~ /item/i) {
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| 314 | # running under windows
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| 315 | if ($ENV{'GSDLOS'} =~ /^windows$/i) {
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| 316 | $output_filename = $tmp_dirname . "\\$tailname\\" . $tailname . ".$output_type";
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| 317 | } else {
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| 318 | $output_filename = $tmp_dirname . "\/$tailname\/" . $tailname . ".$output_type";
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| 319 | }
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| 320 | } else {
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| 321 | $output_filename =~ s/$suffix$/.$output_type/;
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| 322 | }
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| 323 | return $output_filename;
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| 324 | }
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| 325 |
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| 326 |
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| 327 | # Override BasPlug read
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| 328 | # We don't want to get language encoding stuff until after we've converted
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| 329 | # our file to either TEXT or HTML or PagedImage.
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| 330 | sub read {
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| 331 | my $self = shift (@_);
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| 332 | my ($pluginfo, $base_dir, $file, $metadata, $processor, $maxdocs, $total_count, $gli) = @_;
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| 333 | #if ($self->is_recursive()) {
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| 334 | # die "BasPlug::read function must be implemented in sub-class for recursive plugins\n";
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| 335 | # }
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| 336 |
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| 337 | my $outhandle = $self->{'outhandle'};
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| 338 |
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| 339 | my ($block_status,$filename) = $self->read_block(@_);
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| 340 | return $block_status if ((!defined $block_status) || ($block_status==0));
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| 341 | $file = $self->read_tidy_file($file);
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| 342 |
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| 343 | my $output_ext = $self->{'convert_to_ext'};
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| 344 | my $conv_filename = "";
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| 345 | $conv_filename = $self->tmp_area_convert_file($output_ext, $filename);
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| 346 |
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| 347 | if ("$conv_filename" eq "") {return -1;} # had an error, will be passed down pipeline
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| 348 | if (! -e "$conv_filename") {return -1;}
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| 349 | $self->{'conv_filename'} = $conv_filename;
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| 350 | $self->convert_post_process($conv_filename);
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| 351 |
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| 352 | # Run the "fribidi" (http://fribidi.org) Unicode Bidirectional Algorithm program over the converted file
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| 353 | # Added for fixing up Persian PDFs after being processed by pdftohtml, but may be useful in other cases too
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| 354 | if ($self->{'apply_fribidi'} && $self->{'converted_to'} =~ /(HTML|TEXT)/) {
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| 355 | my $fribidi_command = "fribidi \"$conv_filename\" >\"${conv_filename}.tmp\"";
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| 356 | if (system($fribidi_command) != 0) {
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| 357 | print STDERR "ERROR: Cannot run fribidi on \"$conv_filename\".\n";
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| 358 | }
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| 359 | else {
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| 360 | &util::mv("${conv_filename}.tmp", $conv_filename);
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| 361 | }
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| 362 | }
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| 363 |
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| 364 | my $secondary_plugins = $self->{'secondary_plugins'};
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| 365 | my $num_secondary_plugins = scalar(keys %$secondary_plugins);
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| 366 |
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| 367 | if ($num_secondary_plugins == 0) {
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| 368 | print $outhandle "Warning: No secondary plugin to use in conversion. Skipping $file\n";
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| 369 | return 0; # effectively block it
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| 370 | }
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| 371 |
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| 372 | my @plugin_names = keys %$secondary_plugins;
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| 373 | my $plugin_name = shift @plugin_names;
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| 374 |
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| 375 | if ($num_secondary_plugins > 1) {
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| 376 | print $outhandle "Warning: Multiple secondary plugins not supported yet! Choosing $plugin_name\n.";
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| 377 | }
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| 378 |
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| 379 | my $secondary_plugin = $secondary_plugins->{$plugin_name};
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| 380 |
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| 381 | # note: metadata is not carried on to the next level
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| 382 | my ($rv,$doc_obj)
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| 383 | = $secondary_plugin->read_into_doc_obj ($pluginfo,"", $conv_filename,
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| 384 | $metadata, $processor, $maxdocs, $total_count,
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| 385 | $gli);
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| 386 |
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| 387 | if ((!defined $rv) || ($rv<1)) {
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| 388 | # wasn't processed
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| 389 | return $rv;
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| 390 | }
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| 391 |
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| 392 | # Override previous gsdlsourcefilename set by secondary plugin
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| 393 | my $collect_file = &util::filename_within_collection($filename);
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| 394 | my $collect_conv_file = &util::filename_within_collection($conv_filename);
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| 395 | $doc_obj->set_source_filename ($collect_file);
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| 396 | $doc_obj->set_converted_filename($collect_conv_file);
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| 397 |
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| 398 | my ($filemeta) = $file =~ /([^\\\/]+)$/;
|
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| 399 | $doc_obj->set_utf8_metadata_element($doc_obj->get_top_section(), "Source", &ghtml::dmsafe($filemeta));
|
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| 400 | $doc_obj->set_utf8_metadata_element($doc_obj->get_top_section(), "Plugin", "$self->{'plugin_type'}");
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|---|
| 401 | $doc_obj->set_utf8_metadata_element($doc_obj->get_top_section(), "FileSize", (-s $filename));
|
|---|
| 402 |
|
|---|
| 403 | if ($self->{'cover_image'}) {
|
|---|
| 404 | $self->associate_cover_image($doc_obj, $filename);
|
|---|
| 405 | }
|
|---|
| 406 |
|
|---|
| 407 | # do plugin specific processing of doc_obj
|
|---|
| 408 | unless (defined ($self->process(undef, $pluginfo, $base_dir, $file, $metadata, $doc_obj, $gli))) {
|
|---|
| 409 | print STDERR "<ProcessingError n='$file'>\n" if ($gli);
|
|---|
| 410 | return -1;
|
|---|
| 411 | }
|
|---|
| 412 | # do any automatic metadata extraction
|
|---|
| 413 | $self->auto_extract_metadata ($doc_obj);
|
|---|
| 414 |
|
|---|
| 415 | # have we found a Title??
|
|---|
| 416 | $self->title_fallback($doc_obj,$doc_obj->get_top_section(),$filemeta);
|
|---|
| 417 |
|
|---|
| 418 | # add an OID
|
|---|
| 419 | $doc_obj->set_OID();
|
|---|
| 420 | # process the document
|
|---|
| 421 | $processor->process($doc_obj);
|
|---|
| 422 |
|
|---|
| 423 | $self->{'num_processed'} ++;
|
|---|
| 424 |
|
|---|
| 425 | return 1;
|
|---|
| 426 | }
|
|---|
| 427 |
|
|---|
| 428 |
|
|---|
| 429 | # do plugin specific processing of doc_obj for doc_ext type
|
|---|
| 430 | sub process_type {
|
|---|
| 431 | my $self = shift (@_);
|
|---|
| 432 | my ($doc_ext, $base_dir, $file, $doc_obj) = @_;
|
|---|
| 433 |
|
|---|
| 434 | # associate original file with doc object
|
|---|
| 435 | my $cursection = $doc_obj->get_top_section();
|
|---|
| 436 | my $filename = &util::filename_cat($base_dir, $file);
|
|---|
| 437 | $doc_obj->associate_file($filename, "doc.$doc_ext", undef, $cursection);
|
|---|
| 438 |
|
|---|
| 439 | my $file_type;
|
|---|
| 440 |
|
|---|
| 441 | if ($doc_ext eq "doc") {
|
|---|
| 442 | $file_type = "Word";
|
|---|
| 443 | } elsif ($doc_ext eq "xls") {
|
|---|
| 444 | $file_type = "Excel";
|
|---|
| 445 | } elsif ($doc_ext eq "ppt") {
|
|---|
| 446 | $file_type = "PPT";
|
|---|
| 447 | } elsif ($doc_ext eq "pdf") {
|
|---|
| 448 | $file_type = "PDF";
|
|---|
| 449 | } elsif ($doc_ext eq "rtf") {
|
|---|
| 450 | $file_type = "RTF";
|
|---|
| 451 | } elsif ($doc_ext eq "ps") {
|
|---|
| 452 | $file_type = "PS";
|
|---|
| 453 | }
|
|---|
| 454 |
|
|---|
| 455 | my $file_format = $file_type || "unknown";
|
|---|
| 456 |
|
|---|
| 457 | # We use set instead of add here because we only want one value
|
|---|
| 458 | $doc_obj->set_utf8_metadata_element($cursection, "FileFormat", $file_format);
|
|---|
| 459 |
|
|---|
| 460 | my $doclink = "<a href=\"_httpcollection_/index/assoc/[archivedir]/doc.$doc_ext\">";
|
|---|
| 461 | $doc_obj->add_utf8_metadata ($cursection, "srclink", $doclink);
|
|---|
| 462 | $doc_obj->add_utf8_metadata ($cursection, "srcicon", "_icon".$doc_ext."_");
|
|---|
| 463 | $doc_obj->add_utf8_metadata ($cursection, "/srclink", "</a>");
|
|---|
| 464 |
|
|---|
| 465 | return 1;
|
|---|
| 466 | }
|
|---|
| 467 |
|
|---|
| 468 | 1;
|
|---|
| 469 |
|
|---|
| 470 |
|
|---|
| 471 |
|
|---|
| 472 |
|
|---|
| 473 |
|
|---|
| 474 |
|
|---|
| 475 |
|
|---|
