root/gsdl/trunk/perllib/plugins/ImagePlugin.pm @ 15877

Revision 15877, 3.4 KB (checked in by ak19, 11 years ago)

Minor edits to subroutine calls

  • Property svn:keywords set to Author Date Id Revision
Line 
1###########################################################################
2#
3# ImagePlugin.pm -- simple text plugin
4# A component of the Greenstone digital library software
5# from the New Zealand Digital Library Project at the
6# University of Waikato, New Zealand.
7#
8# Copyright (C) 1999 New Zealand Digital Library Project
9#
10# This program is free software; you can redistribute it and/or modify
11# it under the terms of the GNU General Public License as published by
12# the Free Software Foundation; either version 2 of the License, or
13# (at your option) any later version.
14#
15# This program is distributed in the hope that it will be useful,
16# but WITHOUT ANY WARRANTY; without even the implied warranty of
17# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
18# GNU General Public License for more details.
19#
20# You should have received a copy of the GNU General Public License
21# along with this program; if not, write to the Free Software
22# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23#
24###########################################################################
25
26package ImagePlugin;
27
28use BasePlugin;
29use ImageConverter;
30
31use strict;
32no strict 'refs'; # allow filehandles to be variables and viceversa
33
34sub BEGIN {
35    @ImagePlugin::ISA = ('BasePlugin', 'ImageConverter');
36}
37
38my $arguments =
39    [ { 'name' => "process_exp",
40    'desc' => "{BasePlugin.process_exp}",
41    'type' => "regexp",
42    'deft' => &get_default_process_exp(),
43    'reqd' => "no" },
44      ];
45
46my $options = { 'name'     => "ImagePlugin",
47        'desc'     => "{ImagePlugin.desc}",
48        'abstract' => "no",
49        'inherits' => "yes",
50        'args'     => $arguments };
51
52
53
54sub new {
55    my ($class) = shift (@_);
56    my ($pluginlist,$inputargs,$hashArgOptLists) = @_;
57    push(@$pluginlist, $class);
58
59    push(@{$hashArgOptLists->{"ArgList"}},@{$arguments});
60    push(@{$hashArgOptLists->{"OptList"}},$options);
61
62    new ImageConverter($pluginlist, $inputargs, $hashArgOptLists);
63    my $self = new BasePlugin($pluginlist, $inputargs, $hashArgOptLists);
64
65    return bless $self, $class;
66}
67
68sub init {
69    my $self = shift (@_);
70    my ($verbosity, $outhandle, $failhandle) = @_;
71
72    $self->SUPER::init(@_);
73    $self->ImageConverter::init();
74}
75
76sub get_default_process_exp {
77    my $self = shift (@_);
78
79    return q^(?i)(\.jpe?g|\.gif|\.png|\.bmp|\.xbm|\.tif?f)$^;
80}
81
82# this makes no sense for images
83sub block_cover_image
84{
85    my $self =shift (@_);
86    my ($filename) = @_;
87
88    return;
89}
90
91# do plugin specific processing of doc_obj
92sub process {
93    my $self = shift (@_);
94    # options??
95    my ($pluginfo, $base_dir, $file, $metadata, $doc_obj, $gli) = @_;
96
97    my $outhandle = $self->{'outhandle'};
98    my ($filename_full_path, $filename_no_path) = $self->get_full_filenames($base_dir, $file);
99    if ($self->check_imagemagick()) {
100    $self->generate_images($filename_full_path, $filename_no_path, $doc_obj, $doc_obj->get_top_section()); # should we check the return value?
101    } else {
102    # do some basic stuff
103    # associate the image, fileformat, mimetype, srclink, srcicon
104    # do this if image magick not installed. but also if generate hasn't worked?? what about images too small?
105    }
106    #we have no text - adds dummy text and NoText metadata
107    $self->add_dummy_text($doc_obj, $doc_obj->get_top_section());
108
109    return 1;
110
111}
112
113sub clean_up_after_doc_obj_processing {
114    my $self = shift(@_);
115   
116    $self->ImageConverter::clean_up_temporary_files();
117}
118
1191;
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