1 | ###########################################################################
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2 | #
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3 | # TEXTPlug.pm -- simple text plugin
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4 | # A component of the Greenstone digital library software
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5 | # from the New Zealand Digital Library Project at the
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6 | # University of Waikato, New Zealand.
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7 | #
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8 | # Copyright (C) 1999 New Zealand Digital Library Project
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9 | #
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10 | # This program is free software; you can redistribute it and/or modify
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11 | # it under the terms of the GNU General Public License as published by
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12 | # the Free Software Foundation; either version 2 of the License, or
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13 | # (at your option) any later version.
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14 | #
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15 | # This program is distributed in the hope that it will be useful,
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16 | # but WITHOUT ANY WARRANTY; without even the implied warranty of
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17 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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18 | # GNU General Public License for more details.
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19 | #
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20 | # You should have received a copy of the GNU General Public License
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21 | # along with this program; if not, write to the Free Software
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22 | # Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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23 | #
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24 | ###########################################################################
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25 |
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26 | # creates simple single-level document. Adds Title metadata
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27 | # of first line of text (up to 100 characters long).
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28 |
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29 | # 12/05/02 Added usage datastructure - John Thompson
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30 |
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31 | package TEXTPlug;
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32 |
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33 | use BasPlug;
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34 | use parsargv;
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35 |
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36 |
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37 | sub BEGIN {
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38 | @ISA = ('BasPlug');
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39 | }
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40 |
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41 | my $arguments =
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42 | [ { 'name' => "process_exp",
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43 | 'desc' => "{BasPlug.process_exp}",
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44 | 'type' => "regexp",
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45 | 'deft' => &get_default_process_exp(),
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46 | 'reqd' => "no" } ,
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47 | { 'name' => "title_sub",
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48 | 'desc' => "{TEXTPlug.title_sub}",
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49 | 'type' => "regexp",
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50 | 'deft' => "",
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51 | 'reqd' => "no" } ];
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52 |
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53 | my $options = { 'name' => "TEXTPlug",
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54 | 'desc' => "{TEXTPlug.desc}",
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55 | 'abstract' => "no",
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56 | 'inherits' => "yes",
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57 | 'args' => $arguments };
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58 |
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59 |
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60 | sub new {
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61 | my ($class) = shift (@_);
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62 | my ($pluginlist,$inputargs,$hashArgOptLists) = @_;
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63 | push(@$pluginlist, $class);
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64 |
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65 | if(defined $arguments){ push(@{$hashArgOptLists->{"ArgList"}},@{$arguments});}
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66 | if(defined $options) { push(@{$hashArgOptLists->{"OptList"}},$options)};
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67 |
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68 | my $self = (defined $hashArgOptLists)? new BasPlug($pluginlist,$inputargs,$hashArgOptLists): new BasPlug($pluginlist,$inputargs);
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69 |
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70 | return bless $self, $class;
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71 | }
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72 |
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73 | sub get_default_process_exp {
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74 | my $self = shift (@_);
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75 |
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76 | return q^(?i)\.te?xt$^;
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77 | }
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78 |
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79 | # do plugin specific processing of doc_obj
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80 | sub process {
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81 | my $self = shift (@_);
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82 | my ($textref, $pluginfo, $base_dir, $file, $metadata, $doc_obj, $gli) = @_;
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83 | my $outhandle = $self->{'outhandle'};
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84 |
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85 | print STDERR "<Processing n='$file' p='TEXTPlug'>\n" if ($gli);
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86 | print $outhandle "TEXTPlug: processing $file\n"
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87 | if $self->{'verbosity'} > 1;
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88 |
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89 | my $cursection = $doc_obj->get_top_section();
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90 | # get title metadata
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91 | # (don't need to get title if it has been passed
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92 | # in from another plugin)
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93 | if (!defined $metadata->{'Title'}) {
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94 | my ($title) = $$textref;
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95 | $title =~ /^\s+/s;
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96 | if (defined $self->{'title_sub'} &&
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97 | $self->{'title_sub'}) {$title =~ s/$self->{'title_sub'}//;}
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98 | $title =~ /^\s*([^\n]*)/s; $title=$1;
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99 | if (length($title) > 100) {
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100 | $title = substr ($title, 0, 100) . "...";
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101 | }
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102 | $title =~ s/\[/[/g;
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103 | $title =~ s/\[/]/g;
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104 | $title =~ s/\</</g;
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105 | $title =~ s/\>/>/g;
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106 | $doc_obj->add_utf8_metadata ($cursection, "Title", $title);
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107 | }
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108 | # Add FileFormat metadata
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109 | $doc_obj->add_metadata($cursection, "FileFormat", "TEXT");
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110 |
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111 |
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112 | # we need to escape the escape character, or else mg will convert into
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113 | # eg literal newlines, instead of leaving the text as '\n'
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114 | $$textref =~ s/\\/\\\\/g; # macro language
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115 | $$textref =~ s/_/\\_/g; # macro language
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116 | $$textref =~ s/</</g;
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117 | $$textref =~ s/>/>/g;
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118 |
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119 | # insert preformat tags and add text to document object
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120 | $doc_obj->add_utf8_text($cursection, "<pre>\n$$textref\n</pre>");
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121 |
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122 | return 1;
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123 | }
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124 |
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125 | 1;
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126 |
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127 |
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128 |
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129 |
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130 |
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131 |
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132 |
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133 |
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134 |
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135 |
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136 |
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