| 1 | ###########################################################################
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| 2 | #
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| 3 | # StructuredHTMLPlug.pm -- html plugin with extra facilities for teasing out
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| 4 | # hierarchical structure (such as h1, h2, h3 tags) in an HTML document
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| 5 | #
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| 6 | # A component of the Greenstone digital library software
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| 7 | # from the New Zealand Digital Library Project at the
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| 8 | # University of Waikato, New Zealand.
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| 9 | #
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| 10 | # Copyright (C) 1999 New Zealand Digital Library Project
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| 11 | #
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| 12 | # This program is free software; you can redistribute it and/or modify
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| 13 | # it under the terms of the GNU General Public License as published by
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| 14 | # the Free Software Foundation; either version 2 of the License, or
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| 15 | # (at your option) any later version.
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| 16 | #
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| 17 | # This program is distributed in the hope that it will be useful,
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| 18 | # but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 19 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 20 | # GNU General Public License for more details.
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| 21 | #
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| 22 | # You should have received a copy of the GNU General Public License
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| 23 | # along with this program; if not, write to the Free Software
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| 24 | # Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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| 25 | #
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| 26 | ###########################################################################
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| 27 | package StructuredHTMLPlug;
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| 28 |
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| 29 | use HTMLPlug;
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| 30 | use ImagePlug;
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| 31 |
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| 32 | sub BEGIN {
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| 33 | @ISA = ('HTMLPlug');
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| 34 | }
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| 35 |
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| 36 | my $arguments =
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| 37 | [ { 'name' => "check_toc",
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| 38 | 'desc' => "StructuredHTMLPlug.check_toc'}",
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| 39 | 'type' => "flag",
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| 40 | 'reqd' => "no"},
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| 41 | { 'name' => "title_header",
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| 42 | 'desc' => "{StructuredHTMLPlug.title_header}",
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| 43 | 'type' => "regexp",
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| 44 | 'reqd' => "no"},
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| 45 | { 'name' => "level1_header",
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| 46 | 'desc' => "{StructuredHTMLPlug.level1_header}",
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| 47 | 'type' => "regexp",
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| 48 | 'reqd' => "no"},
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| 49 | { 'name' => "level2_header",
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| 50 | 'desc' => "{StructuredHTMLPlug.level2_header}",
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| 51 | 'type' => "regexp",
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| 52 | 'reqd' => "no"},
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| 53 | { 'name' => "level3_header",
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| 54 | 'desc' => "{StructuredHTMLPlug.level3_header}",
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| 55 | 'type' => "regexp",
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| 56 | 'reqd' => "no"},
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| 57 | { 'name' => "toc_header",
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| 58 | 'desc' => "{StructuredHTMLPlug.toc_header}",
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| 59 | 'type' => "regexp",
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| 60 | 'reqd' => "no"},
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| 61 | { 'name' => "tof_header",
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| 62 | 'desc' => "{StructuredHTMLPlug.tof_header}",
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| 63 | 'type' => "regexp",
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| 64 | 'reqd' => "no"}];
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| 65 |
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| 66 | my $options = { 'name' => "StructuredHTMLPlug",
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| 67 | 'desc' => "{StructuredHTMLPlug.desc}",
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| 68 | 'abstract' => "no",
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| 69 | 'inherits' => "yes",
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| 70 | 'args' => $arguments };
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| 71 |
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| 72 | sub new {
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| 73 | my ($class) = shift (@_);
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| 74 | my ($pluginlist,$inputargs,$hashArgOptLists) = @_;
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| 75 | push(@$pluginlist, $class);
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| 76 |
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| 77 | if(defined $arguments){ push(@{$hashArgOptLists->{"ArgList"}},@{$arguments});}
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| 78 | if(defined $options) { push(@{$hashArgOptLists->{"OptList"}},$options)};
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| 79 |
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| 80 | #my $self = (defined $hashArgOptLists)? new ConvertToPlug($pluginlist,$inputargs,$hashArgOptLists): new ConvertToPlug($pluginlist,$inputargs);
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| 81 | my $self = (defined $hashArgOptLists)? new HTMLPlug($pluginlist,$inputargs,$hashArgOptLists): new HTMLPlug($pluginlist,$inputargs);
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| 82 |
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| 83 | print STDERR "*** StrucHTML = $self->{'assoc_files'}\n";
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| 84 |
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| 85 | return bless $self, $class;
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| 86 |
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| 87 | }
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| 88 |
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| 89 | #sub new
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| 90 | #{
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| 91 | # my $class = shift (@_);
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| 92 | # my $self = new HTMLPlug ($class, @_);
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| 93 | # $self->{'plugin_type'} = "StructuredHTMLPlug";
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| 94 | #
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| 95 | # # 14-05-02 To allow for proper inheritance of arguments - John Thompson
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| 96 | # my $option_list = $self->{'option_list'};
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| 97 | # push( @{$option_list}, $options );
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| 98 |
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| 99 | # if (!parsargv::parse(\@_,
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| 100 | # q^check_toc^,\$self->{'check_toc'},
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| 101 | # q^title_header/.*/^,\$self->{'title_header'},
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| 102 | # q^toc_header/.*/^,\$self->{'toc_header'},
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| 103 | # q^tof_header/.*/^,\$self->{'tof_header'},
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| 104 | # q^level1_header/.*/^,\$self->{'level1_header'},
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| 105 | # q^level2_header/.*/^,\$self->{'level2_header'},
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| 106 | # q^level3_header/.*/^,\$self->{'level3_header'},
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| 107 | # "allow_extra_options")) {
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| 108 | #
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| 109 | # #my $self = new HTMLPlug($class, @_);
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| 110 | # print STDERR "\nIncorrect options passed to $plugin_name, ";
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| 111 | # print STDERR "check your collect.cfg configuration file\n";
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| 112 | # $self->print_txt_usage(""); # Use default resource bundle
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| 113 | # die "\n";
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| 114 | # }
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| 115 | # return bless $self, $class;
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| 116 | #}
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| 117 |
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| 118 |
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| 119 | sub read {
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| 120 | my $self = shift (@_);
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| 121 | my ($pluginfo, $base_dir, $file, $metadata, $processor, $maxdocs, $gli) = @_;
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| 122 |
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| 123 | my $filename = $file;
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| 124 | $filename = &util::filename_cat ($base_dir, $file) if $base_dir =~ /\w/;
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| 125 |
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| 126 | if ($filename =~ m/\.html?$/) {
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| 127 | my $poss_doc_filename = $filename;
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| 128 | $poss_doc_filename =~ s/\.html?$/.doc/;
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| 129 |
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| 130 | if (-e $poss_doc_filename) {
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| 131 | # this file has already been processed by Word plugin
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| 132 | return 0;
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| 133 | }
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| 134 | }
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| 135 | return $self->SUPER::read(@_);
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| 136 | }
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| 137 |
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| 138 | sub process {
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| 139 | my $self = shift (@_);
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| 140 | my ($textref, $pluginfo, $base_dir, $file, $metadata, $doc_obj) = @_;
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| 141 | my $outhandle = $self->{'outhandle'};
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| 142 |
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| 143 | print $outhandle "StructuredHTMLPlug: processing $file\n"
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| 144 | if $self->{'verbosity'} > 1;
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| 145 |
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| 146 | my @head_and_body = split(/<body/i,$$textref);
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| 147 | my $head = shift(@head_and_body);
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| 148 | my $body_text = join("<body", @head_and_body);
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| 149 |
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| 150 | # get rid of TOC and TOF sections and their title
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| 151 | # If check_toc is enables, it means to get rid of toc and tof contents.
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| 152 | if ($self->{'check_toc'}){
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| 153 | #line-height:150%;mso-ansi-language:FR'>Contents<o:p></o:p></span></b></p>
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| 154 | # get rid of Table of Contents title and Table of Figures
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| 155 | $body_text =~ s/<p[^>]*><b><span[^>]*>(Table of Content.|Content.)<o:p><\/o:p><\/span><\/b><\/p>//isg;
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| 156 | $body_text =~ s/<p[^>]*><b><span[^>]*>(Table of Figure.|Figure.)<o:p><\/o:p><\/span><\/b><\/p>//isg;
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| 157 | $body_text =~ s/<p class=(($self->{'toc_header'})[^>]*)>(.+?)<\/p>//isg;
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| 158 | $body_text =~ s/<p class=(($self->{'tof_header'})[^>]*)>(.+?)<\/p>//isg;
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| 159 | }
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| 160 |
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| 161 | if ($self->{'title_header'}){
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| 162 | $self->{'title_header'} =~ s/^(\()(.*)(\))/$2/is;
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| 163 | $body_text =~ s/<p class=(($self->{'title_header'})[^>]*)>(.+?)<\/p>/<p class=$1><title>$3<\/title><\/p>/isg;
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| 164 | }
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| 165 | if ($self->{'level1_header'}){
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| 166 | $self->{'level1_header'} =~ s/^(\()(.*)(\))/$2/is;
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| 167 | $body_text =~ s/<p class=(($self->{'level1_header'})[^>]*)>(.+?)<\/p>/<p class=$1><h1>$3<\/h1><\/p>/isg;
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| 168 | }
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| 169 | if ($self->{'level2_header'}){
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| 170 | $self->{'level2_header'} =~ s/^(\()(.*)(\))/$2/is;
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| 171 | $body_text =~ s/<p class=(($self->{'level2_header'})[^>]*)>(.+?)<\/p>/<p class=$1><h2>$3<\/h2><\/p>/isg;
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| 172 | }
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| 173 |
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| 174 | if ($self->{'level3_header'}){
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| 175 | $self->{'level3_header'} =~ s/^(\()(.*)(\))/$2/is;
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| 176 | $body_text =~ s/<p class=(($self->{'level3_header'})[^>]*)>(.+?)<\/p>/<p class=$1><h3>$3<\/h3><\/p>/isg;
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| 177 | }
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| 178 |
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| 179 | # Tidy up extra new lines
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| 180 | $body_text =~ s/(<p[^>]*><span[^>]*><o:p> <\/o:p><\/span><\/p>)//isg;
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| 181 | $body_text =~ s/(<p[^>]*><o:p> <\/o:p><\/p>)//isg;
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| 182 |
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| 183 | my $body = "<body".$body_text;
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| 184 |
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| 185 | my $section_text = $head;
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| 186 | $section_text .= "<!--\n<Section>\n-->\n";
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| 187 |
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| 188 | # split HTML text on <h1>, <h2> etc tags
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| 189 | my @h_split = split(/<h/i,$body);
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| 190 |
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| 191 | my $hnum = 0;
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| 192 |
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| 193 | my $sectionh1 = 0;
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| 194 | $section_text .= shift(@h_split);
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| 195 |
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| 196 | my $hc;
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| 197 | foreach $hc ( @h_split )
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| 198 | {
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| 199 | if ($hc =~ m/^([1-3])\s*.*?>(.*)$/s)
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| 200 | {
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| 201 | my $new_hnum = $1;
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| 202 | my $hc_after = $2;
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| 203 |
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| 204 | if ($hc_after =~ m/^(.*?)<\/h$new_hnum>/is)
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| 205 | {
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| 206 | my $h_text = $1;
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| 207 | $hc =~ s/^(\ \;)+/\ \;/g;
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| 208 | # boil HTML down to some interesting text
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| 209 | $h_text =~ s/^[1-3]>//;
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| 210 | $h_text =~ s/<\/?.*?>//sg;
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| 211 | $h_text =~ s/\s+/ /sg;
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| 212 | $h_text =~ s/^\s$//s;
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| 213 | $h_text =~ s/( )+\W*/ /sg;
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| 214 |
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| 215 | if ($h_text =~ m/\w+/)
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| 216 | {
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| 217 | if ($new_hnum > $hnum)
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| 218 | {
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| 219 | # increase section nesting
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| 220 | $hnum++;
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| 221 | while ($hnum < $new_hnum)
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| 222 | {
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| 223 | my $spacing = " " x $hnum;
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| 224 | $section_text .= "<!--\n";
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| 225 | $section_text .= $spacing."<Section>\n";
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| 226 | $section_text .= "-->\n";
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| 227 | $hnum++;
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| 228 | }
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| 229 | }
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| 230 | else # ($new_hnum <= $hnum)
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| 231 | {
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| 232 | # descrease section nesting
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| 233 | while ($hnum >= $new_hnum)
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| 234 | {
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| 235 | my $spacing = " " x $hnum;
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| 236 | $section_text .= "<!--\n";
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| 237 | $section_text .= $spacing."</Section>\n";
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| 238 | $section_text .= "-->\n";
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| 239 | $hnum--;
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| 240 | }
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| 241 | $hnum++;
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| 242 | }
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| 243 |
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| 244 | my $spacing = " " x $hnum;
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| 245 | $section_text .= "<!--\n";
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| 246 | $section_text .= $spacing."<Section>\n";
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| 247 | $section_text .= $spacing." <Description>\n";
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| 248 | $section_text .= $spacing." <Metadata name=\"Title\">$h_text</Metadata>";
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| 249 | $section_text .= $spacing." </Description>\n";
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| 250 | $section_text .= "-->\n";
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| 251 |
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| 252 | print $outhandle $spacing."$h_text\n"
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| 253 | if $self->{'verbosity'} > 2;
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| 254 |
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| 255 | $sectionh1++ if ($hnum==1);
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| 256 | }
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| 257 | }
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| 258 | else {
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| 259 | ### print STDERR "***** hc = <h$hc\n\n";
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| 260 |
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| 261 | }
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| 262 | # $section_text .= "<!-- \n</Section>\n-->\n";
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| 263 | #print STDERR "***HC = $hc\n";
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| 264 | $section_text .= "<h$hc";
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| 265 | }
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| 266 | else
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| 267 | {
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| 268 | $section_text .= "<h$hc";
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| 269 | }
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| 270 | }
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| 271 |
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| 272 | while ($hnum >= 1)
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| 273 | {
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| 274 | my $spacing = " " x $hnum;
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| 275 | $section_text .= "<!--\n";
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| 276 | $section_text .= $spacing."</Section>\n";
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| 277 | $section_text .= "-->\n";
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| 278 | $hnum--;
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| 279 | }
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| 280 |
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| 281 | $section_text .= "<!--\n</Section>\n-->\n";
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| 282 |
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| 283 | $$textref = $section_text;
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| 284 |
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| 285 | # should be textref not testref???
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| 286 | # $$testref =~ s/<h(\d+)>(.*?)<\/h$1>/<Section><Metadata name=\"Title\">$1<\/Metadata></Section><h$1><\/h$1>/gi;
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| 287 |
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| 288 | if ($sectionh1>0)
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| 289 | {
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| 290 | print $outhandle " Located section headings ..."
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| 291 | if $self->{'verbosity'} > 1;
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| 292 | }
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| 293 | print $outhandle " Passing on the HTMLPlug\n"
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| 294 | if $self->{'verbosity'} > 1;
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| 295 |
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| 296 | $$textref =~ s/<!\[if !vml\]>/<![if vml]>/g;
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| 297 |
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| 298 | $$textref =~ s/( )+/ /sg;
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| 299 |
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| 300 | ## $$textref =~ s/<o:p> <\/o:p>//g; # used with VML to space figures?
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| 301 |
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| 302 | $self->SUPER::process(@_);
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| 303 |
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| 304 | # associate original file with doc object
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| 305 | my $cursection = $doc_obj->get_top_section();
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| 306 | my $filename = &util::filename_cat($base_dir, $file);
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| 307 | if (-e $filename)
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| 308 | {
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| 309 | print $outhandle " Adding associated Word document\n"
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| 310 | if $self->{'verbosity'} > 1;
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| 311 |
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| 312 | $doc_obj->associate_file($filename, "doc.doc", undef, $cursection);
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| 313 |
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| 314 | my $doclink = "<a href=_httpcollection_/index/assoc/[archivedir]/doc.doc>";
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| 315 | $doc_obj->add_utf8_metadata ($cursection, "srclink", $doclink);
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| 316 | $doc_obj->add_utf8_metadata ($cursection, "srcicon", "_icondoc_");
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| 317 | $doc_obj->add_utf8_metadata ($cursection, "/srclink", "</a>");
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| 318 |
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| 319 | my $file_size = -s $filename;
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| 320 | if ($file_size>1024)
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| 321 | {
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| 322 | my $fs_kbytes = sprintf("%d",$file_size/1024);
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| 323 | $doc_obj->add_utf8_metadata ($cursection, "filesize", "$fs_kbytes Kb");
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| 324 | }
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| 325 | else
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| 326 | {
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| 327 | $doc_obj->add_utf8_metadata ($cursection, "filesize", "$file_size bytes");
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| 328 | }
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| 329 |
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| 330 | if ($file_size > 200000)
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| 331 | {
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| 332 | $doc_obj->add_utf8_metadata ($cursection, "fswarning", "1");
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| 333 | }
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| 334 | }
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| 335 | }
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| 336 |
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| 337 |
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| 338 | sub resize_if_necessary
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| 339 | {
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| 340 | my ($self,$front,$back,$base_dir,$href) = @_;
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| 341 |
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| 342 | # dig out width and height of image, if there
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| 343 | my $img_attributes = "$front back";
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| 344 | my ($img_width) = ($img_attributes =~ m/\s+width=\"?(\d+)\"?/i);
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| 345 | my ($img_height) = ($img_attributes =~ m/\s+height=\"?(\d+)\"?/i);
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| 346 |
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| 347 | # derive local filename for image based on its URL
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| 348 | my $img_filename = $href;
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| 349 | $img_filename =~ s/^[^:]*:\/\///;
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| 350 | $img_filename = &util::filename_cat($base_dir, $img_filename);
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| 351 |
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| 352 | # Replace %20's in URL with a space if required. Note that the filename
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| 353 | # may include the %20 in some situations
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| 354 | if ($img_filename =~ /\%20/) {
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| 355 | if (!-e $img_filename) {
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| 356 | $img_filename =~ s/\%20/ /g;
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| 357 | }
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| 358 | }
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| 359 | if ((-e $img_filename) && (defined $img_width) && (defined $img_height)) {
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| 360 | # get image info on width and height
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| 361 |
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| 362 | my $outhandle = $self->{'outhandle'};
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| 363 | my $verbosity = $self->{'verbosity'};
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| 364 |
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| 365 | my ($image_type, $actual_width, $actual_height, $image_size)
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| 366 | = &ImagePlug::identify($img_filename, $outhandle, $verbosity);
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| 367 |
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| 368 | print STDERR "**** $actual_width x $actual_height";
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| 369 | print STDERR " (requested: $img_width x $img_height)\n";
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| 370 |
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| 371 | if (($img_width < $actual_width) || ($img_height < $actual_height)) {
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| 372 | print $outhandle "Resizing $img_filename\n" if ($verbosity > 0);
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| 373 |
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| 374 | # derive new image name based on current image
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| 375 | my ($tailname, $dirname, $suffix)
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| 376 | = &File::Basename::fileparse($input_filename, "\\.[^\\.]+\$");
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| 377 |
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| 378 | my $resized_filename
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| 379 | = &util::filename_cat($dirname, $tailname."_resized".$suffix);
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| 380 |
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| 381 | print STDERR "**** suffix = $suffix\n";
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| 382 |
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| 383 | # Generate smaller image with convert
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| 384 | my $newsize = "$img_widthx$image_height";
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| 385 | my $command = "convert -interlace plane -verbose "
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| 386 | ."-geometry $newsize \"img_$filename\" \"$resized_filename\"";
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| 387 | print $outhandle "ImageResize: $command\n" if ($verbosity > 2);
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| 388 | my $result = '';
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| 389 | print $outhandle "ImageResize result: $result\n" if ($verbosity > 2);
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| 390 |
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| 391 | }
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| 392 | }
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| 393 |
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| 394 | return $href;
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| 395 | }
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| 396 |
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| 397 |
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| 398 |
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| 399 |
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| 400 | sub replace_images {
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| 401 | my $self = shift (@_);
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| 402 | my ($front, $link, $back, $base_dir,
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| 403 | $file, $doc_obj, $section) = @_;
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| 404 | # remove quotes from link at start and end if necessary
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| 405 | if ($link=~/^\"/) {
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| 406 | $link=~s/^\"//;$link=~s/\"$//;
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| 407 | $front.='"';
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| 408 | $back="\"$back";
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| 409 | }
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| 410 |
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| 411 | $link =~ s/\n/ /g;
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| 412 |
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| 413 | my ($href, $hash_part, $rl) = $self->format_link ($link, $base_dir, $file);
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| 414 |
|
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| 415 | ## $href = $self->resize_if_necessary($front,$back,$base_dir,$href);
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| 416 |
|
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| 417 | my $middle = $self->add_file ($href, $rl, $hash_part, $base_dir, $doc_obj, $section);
|
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| 418 |
|
|---|
| 419 | return $front . $middle . $back;
|
|---|
| 420 | }
|
|---|
| 421 |
|
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| 422 |
|
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| 423 | 1;
|
|---|
