224 lines
7.4 KiB
Perl
224 lines
7.4 KiB
Perl
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#------------------------------------------------------------------------------
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# File: iWork.pm
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#
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# Description: Read Apple iWork '09 XML+ZIP files
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#
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# Revisions: 2009/11/11 - P. Harvey Created
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#------------------------------------------------------------------------------
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package Image::ExifTool::iWork;
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use strict;
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use vars qw($VERSION);
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use Image::ExifTool qw(:DataAccess :Utils);
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use Image::ExifTool::XMP;
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use Image::ExifTool::ZIP;
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$VERSION = '1.04';
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# test for recognized iWork document extensions and outer XML elements
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my %iWorkType = (
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# file extensions
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NUMBERS => 'NUMBERS',
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PAGES => 'PAGES',
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KEY => 'KEY',
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KTH => 'KTH',
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NMBTEMPLATE => 'NMBTEMPLATE',
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# we don't support double extensions --
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# "PAGES.TEMPLATE" => 'Apple Pages Template',
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# outer XML elements
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'ls:document' => 'NUMBERS',
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'sl:document' => 'PAGES',
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'key:presentation' => 'KEY',
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);
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# MIME types for iWork files (Apple has not registered these yet, but these
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# are my best guess after doing some googling. I'm not 100% sure what "sff"
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# indicates, but I think it refers to the new "flattened" package format)
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my %mimeType = (
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'NUMBERS' => 'application/x-iwork-numbers-sffnumbers',
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'PAGES' => 'application/x-iwork-pages-sffpages',
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'KEY' => 'application/x-iWork-keynote-sffkey',
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'NMBTEMPLATE' => 'application/x-iwork-numbers-sfftemplate',
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'PAGES.TEMPLATE'=> 'application/x-iwork-pages-sfftemplate',
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'KTH' => 'application/x-iWork-keynote-sffkth',
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);
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# iWork tags
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%Image::ExifTool::iWork::Main = (
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GROUPS => { 0 => 'XML', 1 => 'XML', 2 => 'Document' },
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PROCESS_PROC => \&Image::ExifTool::XMP::ProcessXMP,
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VARS => { NO_ID => 1 },
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NOTES => q{
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The Apple iWork '09 file format is a ZIP archive containing XML files
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similar to the Office Open XML (OOXML) format. Metadata tags in iWork
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files are extracted even if they don't appear below.
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},
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authors => { Name => 'Author', Groups => { 2 => 'Author' } },
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comment => { },
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copyright => { Groups => { 2 => 'Author' } },
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keywords => { },
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projects => { List => 1 },
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title => { },
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);
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#------------------------------------------------------------------------------
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# Generate a tag ID for this XML tag
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# Inputs: 0) tag property name list ref
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# Returns: tagID
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sub GetTagID($)
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{
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my $props = shift;
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return 0 if $$props[-1] =~ /^\w+:ID$/; # ignore ID tags
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return ($$props[0] =~ /^.*?:(.*)/) ? $1 : $$props[0];
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}
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#------------------------------------------------------------------------------
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# We found an XMP property name/value
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# Inputs: 0) ExifTool object ref, 1) tag table ref
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# 2) reference to array of XMP property names (last is current property)
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# 3) property value, 4) attribute hash ref (not used here)
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# Returns: 1 if valid tag was found
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sub FoundTag($$$$;$)
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{
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my ($et, $tagTablePtr, $props, $val, $attrs) = @_;
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return 0 unless @$props;
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my $verbose = $et->Options('Verbose');
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$et->VPrint(0, " | - Tag '", join('/',@$props), "'\n") if $verbose > 1;
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# un-escape XML character entities
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$val = Image::ExifTool::XMP::UnescapeXML($val);
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# convert from UTF8 to ExifTool Charset
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$val = $et->Decode($val, 'UTF8');
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my $tag = GetTagID($props) or return 0;
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# add any unknown tags to table
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unless ($$tagTablePtr{$tag}) {
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$et->VPrint(0, " [adding $tag]\n") if $verbose;
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AddTagToTable($tagTablePtr, $tag, { Name => ucfirst $tag });
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}
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# save the tag
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$et->HandleTag($tagTablePtr, $tag, $val);
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return 1;
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}
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#------------------------------------------------------------------------------
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# Extract information from an iWork file
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# Inputs: 0) ExifTool object reference, 1) dirInfo reference
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# Returns: 1
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# Notes: Upon entry to this routine, the file type has already been verified
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# as ZIP and the dirInfo hash contains a 'ZIP' Archive::Zip object reference
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sub Process_iWork($$)
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{
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my ($et, $dirInfo) = @_;
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my $zip = $$dirInfo{ZIP};
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my ($type, $index, $indexFile, $status);
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# try to determine the file type
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local $SIG{'__WARN__'} = \&Image::ExifTool::ZIP::WarnProc;
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# trust type given by file extension if available
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$type = $iWorkType{$$et{FILE_EXT}} if $$et{FILE_EXT};
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unless ($type) {
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# read the index file
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my @members = $zip->membersMatching('^index\.(xml|apxl)$');
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if (@members) {
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($index, $status) = $zip->contents($members[0]);
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unless ($status) {
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$indexFile = $members[0]->fileName();
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if ($index =~ /^\s*<\?xml version=[^<]+<(\w+:\w+)/s) {
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$type = $iWorkType{$1} if $iWorkType{$1};
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}
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}
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}
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$type or $type = 'ZIP'; # assume ZIP by default
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}
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$et->SetFileType($type, $mimeType{$type});
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my @members = $zip->members();
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my $docNum = 0;
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my $member;
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foreach $member (@members) {
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# get filename of this ZIP member
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my $file = $member->fileName();
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next unless defined $file;
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$et->VPrint(0, "File: $file\n");
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# set the document number and extract ZIP tags
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$$et{DOC_NUM} = ++$docNum;
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Image::ExifTool::ZIP::HandleMember($et, $member);
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# process only the index XML and JPEG thumbnail files
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next unless $file =~ m{^(index\.(xml|apxl)|QuickLook/Thumbnail\.jpg)$}i;
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# get the file contents if necessary
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# (CAREFUL! $buff MUST be local since we hand off a value ref to PreviewImage)
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my ($buff, $buffPt);
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if ($indexFile and $indexFile eq $file) {
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# use the index file we already loaded
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$buffPt = \$index;
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} else {
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($buff, $status) = $zip->contents($member);
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$status and $et->Warn("Error extracting $file"), next;
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$buffPt = \$buff;
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}
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# extract JPEG as PreviewImage (should only be QuickLook/Thumbnail.jpg)
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if ($file =~ /\.jpg$/) {
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$et->FoundTag('PreviewImage', $buffPt);
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next;
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}
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# process "metadata" section of XML index file
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next unless $$buffPt =~ /<(\w+):metadata>/g;
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my $ns = $1;
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my $p1 = pos $$buffPt;
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next unless $$buffPt =~ m{</${ns}:metadata>}g;
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# construct XML data from "metadata" section only
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$$buffPt = '<?xml version="1.0"?>' . substr($$buffPt, $p1, pos($$buffPt)-$p1);
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my %dirInfo = (
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DataPt => $buffPt,
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DirLen => length $$buffPt,
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DataLen => length $$buffPt,
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XMPParseOpts => {
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FoundProc => \&FoundTag,
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},
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);
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my $tagTablePtr = GetTagTable('Image::ExifTool::iWork::Main');
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$et->ProcessDirectory(\%dirInfo, $tagTablePtr);
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undef $$buffPt; # (free memory now)
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}
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delete $$et{DOC_NUM};
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return 1;
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}
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1; # end
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__END__
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=head1 NAME
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Image::ExifTool::iWork - Read Apple iWork '09 XML+ZIP files
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=head1 SYNOPSIS
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This module is used by Image::ExifTool
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=head1 DESCRIPTION
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This module contains definitions required by Image::ExifTool to extract meta
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information from Apple iWork '09 XML+ZIP files.
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=head1 AUTHOR
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Copyright 2003-2016, Phil Harvey (phil at owl.phy.queensu.ca)
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This library is free software; you can redistribute it and/or modify it
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under the same terms as Perl itself.
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=head1 SEE ALSO
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L<Image::ExifTool::TagNames/iWork Tags>,
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L<Image::ExifTool::TagNames/OOXML Tags>,
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L<Image::ExifTool(3pm)|Image::ExifTool>
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=cut
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