647 lines
21 KiB
Perl
647 lines
21 KiB
Perl
# Module of TWiki Enterprise Collaboration Platform, http://TWiki.org/
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#
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# Copyright (C) 2001-2007 Peter Thoeny, peter@thoeny.org
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# and TWiki Contributors. All Rights Reserved. TWiki Contributors
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# are listed in the AUTHORS file in the root of this distribution.
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# NOTE: Please extend that file, not this notice.
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License
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# as published by the Free Software Foundation; either version 2
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# of the License, or (at your option) any later version. For
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# more details read LICENSE in the root of this distribution.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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#
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# As per the GPL, removal of this notice is prohibited.
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=begin twiki
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---+ package TWiki::Attach
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A singleton object of this class is used to deal with attachments to topics.
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=cut
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# Note: Meta-data is stored in topics fo performance. You need to use the
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# official API to manipulate attachments. Dropping files into the
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# attachments directory works only if the {AutoAttachPubFiles} configure
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# setting is enabled.
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package TWiki::Attach;
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use strict;
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use Assert;
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use TWiki::Attrs;
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use TWiki::Store;
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use TWiki::User;
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use TWiki::Prefs;
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use TWiki::Meta;
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use TWiki::Time;
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=pod
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---++ ClassMethod new( $session )
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Constructor
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=cut
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sub new {
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my ( $class, $session ) = @_;
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my $this = bless( {}, $class );
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ASSERT($session->isa( 'TWiki')) if DEBUG;
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$this->{session} = $session;
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return $this;
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}
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=pod
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---++ ObjectMethod renderMetaData( $web, $topic, $meta, $args ) -> $text
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Generate a table of attachments suitable for the bottom of a topic
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view, using templates for the header, footer and each row.
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* =$web= the web
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* =$topic= the topic
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* =$meta= meta-data hash for the topic
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* =$args= hash of attachment arguments
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=cut
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sub renderMetaData {
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my( $this, $web, $topic, $meta, $attrs ) = @_;
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ASSERT($this->isa( 'TWiki::Attach')) if DEBUG;
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my $showAll = $attrs->{all};
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my $showAttr = $showAll ? 'h' : '';
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my $A = ( $showAttr ) ? ':A' : '';
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my $title = $attrs->{title} || '';
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my $tmplname = $attrs->{template} || 'attachtables';
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my @attachments = $meta->find( 'FILEATTACHMENT' );
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return '' unless @attachments;
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my $templates = $this->{session}->{templates};
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$templates->readTemplate($tmplname);
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my $rows = '';
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my $row = $templates->expandTemplate('ATTACH:files:row'.$A);
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foreach my $attachment (
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sort { ( $a->{name} || '') cmp ( $b->{name} || '' )}
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@attachments ) {
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my $attrAttr = $attachment->{attr};
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if( ! $attrAttr || ( $showAttr && $attrAttr =~ /^[$showAttr]*$/ )) {
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$rows .= $this->_formatRow( $web, $topic, $attachment, $row );
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}
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}
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my $text = '';
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if( $showAll || $rows ne '' ) {
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my $header = $templates->expandTemplate('ATTACH:files:header'.$A);
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my $footer = $templates->expandTemplate('ATTACH:files:footer'.$A);
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$text = $header.$rows.$footer;
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}
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return $title.$text;
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}
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=pod
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---++ ObjectMethod formatVersions ( $web, $topic, $attrs ) -> $text
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Generate a version history table for a single attachment
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* =$web= - the web
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* =$topic= - the topic
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* =$attrs= - Hash of meta-data attributes
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=cut
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sub formatVersions {
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my( $this, $web, $topic, %attrs ) = @_;
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ASSERT($this->isa( 'TWiki::Attach')) if DEBUG;
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my $store = $this->{session}->{store};
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my $latestRev =
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$store->getRevisionNumber( $web, $topic, $attrs{name} );
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my $templates = $this->{session}->{templates};
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$templates->readTemplate('attachtables');
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my $header = $templates->expandTemplate('ATTACH:versions:header');
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my $footer = $templates->expandTemplate('ATTACH:versions:footer');
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my $row = $templates->expandTemplate('ATTACH:versions:row');
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my $rows ='';
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for( my $rev = $latestRev; $rev >= 1; $rev-- ) {
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my( $date, $user, $minorRev, $comment ) =
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$store->getRevisionInfo( $web, $topic, $rev, $attrs{name} );
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$user = $user->webDotWikiName() if( $user );
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$rows .= $this->_formatRow( $web, $topic,
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{
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name => $attrs{name},
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version => $rev,
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date => $date,
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user => $user,
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comment => $comment,
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attr => $attrs{attr},
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size => $attrs{size}
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},
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$row );
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}
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return "$header$rows$footer";
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}
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#Format a single row in an attachment table by expanding a template.
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#| =$web= | the web |
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#| =$topic= | the topic |
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#| =$info= | hash containing fields name, user (user (not wikiname) who uploaded this revision), date (date of _this revision_ of the attachment), command and version (the required revision; required to be a full (major.minor) revision number) |
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#| =$tmpl= | The template of a row |
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sub _formatRow {
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my ( $this, $web, $topic, $info, $tmpl ) = @_;
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my $row = $tmpl;
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$row =~ s/%A_(\w+)%/$this->_expandAttrs($1,$web,$topic,$info)/ge;
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$row =~ s/$TWiki::TranslationToken/%/go;
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return $row;
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}
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sub _expandAttrs {
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my ( $this, $attr, $web, $topic, $info ) = @_;
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my $file = $info->{name};
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if ( $attr eq 'REV' ) {
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return $info->{version};
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}
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elsif ( $attr eq 'ICON' ) {
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my $picked = $this->{session}->mapToIconFileName( $file );
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my $url = $this->{session}->getIconUrl( 0, $picked );
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return CGI::img( { src => $url, width => 16, height=>16,
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align => 'top',
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alt => $picked || '',
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border => 0 });
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}
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elsif ( $attr eq 'EXT' ) {
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# $fileExtension is used to map the attachment to its MIME type
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# only grab the last extension in case of multiple extensions
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$file =~ m/\.([^.]*)$/;
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return $1;
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}
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elsif ( $attr eq 'URL' ) {
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return $this->{session}->getScriptUrl
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( 0, 'viewfile', $web, $topic,
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rev => $info->{version} || undef, filename => $file );
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}
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elsif ( $attr eq 'SIZE' ) {
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my $attrSize = $info->{size};
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$attrSize = 100 if( !$attrSize || $attrSize < 100 );
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return sprintf( "%1.1f K", $attrSize / 1024 );
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}
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elsif ( $attr eq 'COMMENT' ) {
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my $comment = $info->{comment};
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if ( $comment) {
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$comment =~ s/\|/|/g;
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} else {
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$comment = " ";
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}
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return $comment;
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}
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elsif ( $attr eq 'ATTRS' ) {
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return $info->{attr} or " ";
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}
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elsif ( $attr eq 'FILE' ) {
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return $file;
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}
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elsif ( $attr eq 'DATE' ) {
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return TWiki::Time::formatTime( $info->{date} || 0 );
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}
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elsif ( $attr eq 'USER' ) {
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my $user = $this->{session}->{users}->findUser($info->{user});
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if (defined($user)) {
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return $user->webDotWikiName();
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} else {
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return $info->{user};
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}
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}
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else {
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return $TWiki::TranslationToken.'A_'.$attr.$TWiki::TranslationToken;
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}
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}
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=pod
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---++ ObjectMethod getAttachmentLink( $user, $web, $topic, $name, $meta ) -> $html
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* =$user= - User doing the reading
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* =$web= - Name of the web
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* =$topic= - Name of the topic
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* =$name= - Name of the attachment
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* =$meta= - Meta object that contains the meta info
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Build a link to the attachment, suitable for insertion in the topic.
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=cut
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sub getAttachmentLink {
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my ( $this, $user, $web, $topic, $attName, $meta ) = @_;
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ASSERT($this->isa( 'TWiki::Attach')) if DEBUG;
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my $att = $meta->get( 'FILEATTACHMENT', $attName );
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my $fileComment = $att->{comment};
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$fileComment = $attName unless ( $fileComment );
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my $fileLink = '';
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my $imgSize = '';
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my $prefs = $this->{session}->{prefs};
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my $store = $this->{session}->{store};
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if( $attName =~ /\.(gif|jpg|jpeg|png)$/i ) {
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# inline image
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# The pixel size calculation is done for performance reasons
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# Some browsers wait with rendering a page until the size of
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# embedded images is known, e.g. after all images of a page are
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# downloaded. When you upload an image to TWiki and checkmark
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# the link checkbox, TWiki will generate the width and height
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# img parameters, speeding up the page rendering.
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my $stream = $store->getAttachmentStream( $user, $web, $topic, $attName );
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my( $nx, $ny ) = &_imgsize( $stream, $attName );
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my @attrs;
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if( $nx > 0 && $ny > 0 ) {
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push( @attrs, width=>$nx, height=>$ny );
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$imgSize = "width='$nx' height='$ny'";
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}
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$fileLink = $prefs->getPreferencesValue( 'ATTACHEDIMAGEFORMAT' );
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unless( $fileLink ) {
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push( @attrs, src=>"%ATTACHURLPATH%/$attName" );
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push( @attrs, alt=>$attName );
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return " * $fileComment: ".CGI::br().CGI::img({ @attrs });
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}
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} else {
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# normal attached file
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$fileLink = $prefs->getPreferencesValue( 'ATTACHEDFILELINKFORMAT' );
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unless( $fileLink ) {
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return " * [[%ATTACHURL%/$attName][$attName]]: $fileComment";
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}
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}
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$fileLink =~ s/\$name/$attName/g;
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$fileLink =~ s/\$comment/$fileComment/g;
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$fileLink =~ s/\$size/$imgSize/g;
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$fileLink =~ s/\\t/\t/go;
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$fileLink =~ s/\\n/\n/go;
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$fileLink =~ s/([^\n])$/$1\n/;
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return $fileLink;
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}
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# code fragment to extract pixel size from images
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# taken from http://www.tardis.ed.ac.uk/~ark/wwwis/
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# subroutines: _imgsize, _gifsize, _OLDgifsize, _gif_blockskip,
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# _NEWgifsize, _jpegsize
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#
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sub _imgsize {
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my( $file, $att ) = @_;
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my( $x, $y) = ( 0, 0 );
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if( defined( $file ) ) {
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# for crappy MS OSes - Win/Dos/NT use is NOT SUPPORTED
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binmode( $file );
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my $s;
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return ( 0, 0 ) unless ( read( $file, $s, 4 ) == 4 );
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seek( $file, 0, 0 );
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if ( $s eq 'GIF8' ) {
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# GIF 47 49 46 38
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( $x, $y ) = _gifsize( $file );
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} else {
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my ( $a, $b, $c, $d ) = unpack( 'C4', $s );
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if ( $a == 0x89 && $b == 0x50 &&
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$c == 0x4E && $d == 0x47 ) {
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# PNG 89 50 4e 47
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( $x, $y ) = _pngsize( $file );
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} elsif ( $a == 0xFF && $b == 0xD8 &&
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$c == 0xFF && $d == 0xE0 ) {
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# JPG ff d8 ff e0
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( $x, $y ) = _jpegsize( $file );
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}
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}
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close( $file );
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}
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return( $x, $y );
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}
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sub _gifsize
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{
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my( $GIF ) = @_;
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if( 0 ) {
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return &_NEWgifsize( $GIF );
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} else {
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return &_OLDgifsize( $GIF );
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}
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}
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sub _OLDgifsize {
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my( $GIF ) = @_;
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my( $type, $a, $b, $c, $d, $s ) = ( 0, 0, 0, 0, 0, 0 );
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if( defined( $GIF ) &&
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read( $GIF, $type, 6 ) &&
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$type =~ /GIF8[7,9]a/ &&
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read( $GIF, $s, 4 ) == 4 ) {
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( $a, $b, $c, $d ) = unpack( 'C'x4, $s );
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return( $b<<8|$a, $d<<8|$c );
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}
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return( 0, 0 );
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}
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# part of _NEWgifsize
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sub _gif_blockskip {
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my ( $GIF, $skip, $type ) = @_;
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my ( $s ) = 0;
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my ( $dummy ) = '';
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read( $GIF, $dummy, $skip ); # Skip header (if any)
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while( 1 ) {
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if( eof( $GIF ) ) {
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#warn "Invalid/Corrupted GIF (at EOF in GIF $type)\n";
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return '';
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}
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read( $GIF, $s, 1 ); # Block size
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last if ord( $s ) == 0; # Block terminator
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read( $GIF, $dummy, ord( $s ) ); # Skip data
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}
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}
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# this code by "Daniel V. Klein" <dvk@lonewolf.com>
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sub _NEWgifsize {
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my( $GIF ) = @_;
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my( $cmapsize, $a, $b, $c, $d, $e ) = 0;
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my( $type, $s ) = ( 0, 0 );
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my( $x, $y ) = ( 0, 0 );
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my( $dummy ) = '';
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return( $x,$y ) if( !defined $GIF );
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read( $GIF, $type, 6 );
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if( $type !~ /GIF8[7,9]a/ || read( $GIF, $s, 7 ) != 7 ) {
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#warn "Invalid/Corrupted GIF (bad header)\n";
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return( $x, $y );
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}
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( $e ) = unpack( "x4 C", $s );
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if( $e & 0x80 ) {
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$cmapsize = 3 * 2**(($e & 0x07) + 1);
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if( !read( $GIF, $dummy, $cmapsize ) ) {
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#warn "Invalid/Corrupted GIF (global color map too small?)\n";
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return( $x, $y );
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}
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}
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FINDIMAGE:
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while( 1 ) {
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if( eof( $GIF ) ) {
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#warn "Invalid/Corrupted GIF (at EOF w/o Image Descriptors)\n";
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return( $x, $y );
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}
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read( $GIF, $s, 1 );
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( $e ) = unpack( 'C', $s );
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if( $e == 0x2c ) { # Image Descriptor (GIF87a, GIF89a 20.c.i)
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if( read( $GIF, $s, 8 ) != 8 ) {
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#warn "Invalid/Corrupted GIF (missing image header?)\n";
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return( $x, $y );
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}
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( $a, $b, $c, $d ) = unpack( "x4 C4", $s );
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$x = $b<<8|$a;
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$y = $d<<8|$c;
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return( $x, $y );
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}
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if( $type eq 'GIF89a' ) {
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if( $e == 0x21 ) { # Extension Introducer (GIF89a 23.c.i)
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read( $GIF, $s, 1 );
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( $e ) = unpack( 'C', $s );
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if( $e == 0xF9 ) { # Graphic Control Extension (GIF89a 23.c.ii)
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read( $GIF, $dummy, 6 ); # Skip it
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next FINDIMAGE; # Look again for Image Descriptor
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} elsif( $e == 0xFE ) { # Comment Extension (GIF89a 24.c.ii)
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&_gif_blockskip( $GIF, 0, 'Comment' );
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next FINDIMAGE; # Look again for Image Descriptor
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} elsif( $e == 0x01 ) { # Plain Text Label (GIF89a 25.c.ii)
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&_gif_blockskip( $GIF, 12, 'text data' );
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next FINDIMAGE; # Look again for Image Descriptor
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} elsif( $e == 0xFF ) { # Application Extension Label (GIF89a 26.c.ii)
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&_gif_blockskip( $GIF, 11, 'application data' );
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next FINDIMAGE; # Look again for Image Descriptor
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} else {
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#printf STDERR "Invalid/Corrupted GIF (Unknown extension %#x)\n", $e;
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return( $x, $y );
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}
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} else {
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#printf STDERR "Invalid/Corrupted GIF (Unknown code %#x)\n", $e;
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return( $x, $y );
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}
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} else {
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#warn "Invalid/Corrupted GIF (missing GIF87a Image Descriptor)\n";
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return( $x, $y );
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}
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}
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}
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# _jpegsize : gets the width and height (in pixels) of a jpeg file
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# Andrew Tong, werdna@ugcs.caltech.edu February 14, 1995
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# modified slightly by alex@ed.ac.uk
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sub _jpegsize {
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my( $JPEG ) = @_;
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my( $done ) = 0;
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my( $c1, $c2, $ch, $s, $length, $dummy ) = ( 0, 0, 0, 0, 0, 0 );
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my( $a, $b, $c, $d );
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if( defined( $JPEG ) &&
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read( $JPEG, $c1, 1 ) &&
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read( $JPEG, $c2, 1 ) &&
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ord( $c1 ) == 0xFF &&
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ord( $c2 ) == 0xD8 ) {
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while ( ord( $ch ) != 0xDA && !$done ) {
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# Find next marker (JPEG markers begin with 0xFF)
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# This can hang the program!!
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while( ord( $ch ) != 0xFF ) {
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return( 0, 0 ) unless read( $JPEG, $ch, 1 );
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}
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# JPEG markers can be padded with unlimited 0xFF's
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while( ord( $ch ) == 0xFF ) {
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return( 0, 0 ) unless read( $JPEG, $ch, 1 );
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}
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# Now, $ch contains the value of the marker.
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if( ( ord( $ch ) >= 0xC0 ) && ( ord( $ch ) <= 0xC3 ) ) {
|
|
return( 0, 0 ) unless read( $JPEG, $dummy, 3 );
|
|
return( 0, 0 ) unless read( $JPEG, $s, 4 );
|
|
( $a, $b, $c, $d ) = unpack( 'C'x4, $s );
|
|
return( $c<<8|$d, $a<<8|$b );
|
|
} else {
|
|
# We **MUST** skip variables, since FF's within variable
|
|
# names are NOT valid JPEG markers
|
|
return( 0, 0 ) unless read( $JPEG, $s, 2 );
|
|
( $c1, $c2 ) = unpack( 'C'x2, $s );
|
|
$length = $c1<<8|$c2;
|
|
last if( !defined( $length ) || $length < 2 );
|
|
read( $JPEG, $dummy, $length-2 );
|
|
}
|
|
}
|
|
}
|
|
return( 0, 0 );
|
|
}
|
|
|
|
# _pngsize : gets the width & height (in pixels) of a png file
|
|
# source: http://www.la-grange.net/2000/05/04-png.html
|
|
sub _pngsize {
|
|
my ($PNG) = @_;
|
|
my ($head) = '';
|
|
my($a, $b, $c, $d, $e, $f, $g, $h)=0;
|
|
if( defined($PNG) &&
|
|
read( $PNG, $head, 8 ) == 8 &&
|
|
$head eq "\x89\x50\x4e\x47\x0d\x0a\x1a\x0a" &&
|
|
read($PNG, $head, 4) == 4 &&
|
|
read($PNG, $head, 4) == 4 &&
|
|
$head eq 'IHDR' &&
|
|
read($PNG, $head, 8) == 8 ){
|
|
($a,$b,$c,$d,$e,$f,$g,$h)=unpack('C'x8,$head);
|
|
return ($a<<24|$b<<16|$c<<8|$d, $e<<24|$f<<16|$g<<8|$h);
|
|
}
|
|
return (0,0);
|
|
}
|
|
|
|
#Get file attachment attributes for old html
|
|
#format.
|
|
sub _getOldAttachAttr {
|
|
my( $this, $atext ) = @_;
|
|
my $fileName='';
|
|
my $filePath='';
|
|
my $fileSize='';
|
|
my $fileDate='';
|
|
my $fileUser='';
|
|
my $fileComment='';
|
|
my $before='';
|
|
my $item='';
|
|
my $after='';
|
|
|
|
( $before, $fileName, $after ) = split( /<(?:\/)*TwkFileName>/, $atext );
|
|
if( ! $fileName ) { $fileName = ''; }
|
|
if( $fileName ) {
|
|
( $before, $filePath, $after ) = split( /<(?:\/)*TwkFilePath>/, $atext );
|
|
if( ! $filePath ) { $filePath = ''; }
|
|
$filePath =~ s/<TwkData value="(.*)">//go;
|
|
if( $1 ) { $filePath = $1; } else { $filePath = ''; }
|
|
$filePath =~ s/\%NOP\%//goi; # delete placeholder that prevents WikiLinks
|
|
( $before, $fileSize, $after ) = split( /<(?:\/)*TwkFileSize>/, $atext );
|
|
if( ! $fileSize ) { $fileSize = '0'; }
|
|
( $before, $fileDate, $after ) = split( /<(?:\/)*TwkFileDate>/, $atext );
|
|
if( ! $fileDate ) {
|
|
$fileDate = '';
|
|
} else {
|
|
$fileDate =~ s/ / /go;
|
|
$fileDate = TWiki::Time::parseTime( $fileDate );
|
|
}
|
|
( $before, $fileUser, $after ) = split( /<(?:\/)*TwkFileUser>/, $atext );
|
|
if( ! $fileUser ) {
|
|
$fileUser = '';
|
|
} else {
|
|
my $u = $this->{session}->{users}->findUser( $fileUser );
|
|
$fileUser = $u->login() if $u;
|
|
}
|
|
$fileUser =~ s/ //go;
|
|
( $before, $fileComment, $after ) = split( /<(?:\/)*TwkFileComment>/, $atext );
|
|
if( ! $fileComment ) { $fileComment = ''; }
|
|
}
|
|
|
|
return ( $fileName, $filePath, $fileSize, $fileDate, $fileUser, $fileComment );
|
|
}
|
|
|
|
=pod
|
|
|
|
---++ ObjectMethod migrateToFileAttachmentMacro ( $meta, $text ) -> $text
|
|
|
|
Migrate old HTML format
|
|
|
|
=cut
|
|
|
|
sub migrateToFileAttachmentMacro {
|
|
my ( $this, $meta, $text ) = @_;
|
|
ASSERT($this->isa( 'TWiki::Attach')) if DEBUG;
|
|
ASSERT($meta->isa( 'TWiki::Meta')) if DEBUG;
|
|
|
|
my ( $before, $atext, $after ) = split( /<!--TWikiAttachment-->/, $text );
|
|
$text = $before || '';
|
|
$text .= $after if( $after );
|
|
$atext = '' if( ! $atext );
|
|
|
|
if( $atext =~ /<TwkNextItem>/ ) {
|
|
my $line = '';
|
|
foreach $line ( split( /<TwkNextItem>/, $atext ) ) {
|
|
my( $fileName, $filePath, $fileSize, $fileDate, $fileUser, $fileComment ) =
|
|
$this->_getOldAttachAttr( $line );
|
|
|
|
if( $fileName ) {
|
|
$meta->putKeyed( 'FILEATTACHMENT',
|
|
{
|
|
name => $fileName,
|
|
version => '',
|
|
path => $filePath,
|
|
size => $fileSize,
|
|
date => $fileDate,
|
|
user => $fileUser,
|
|
comment => $fileComment,
|
|
attr => ''
|
|
});
|
|
}
|
|
}
|
|
} else {
|
|
# Format of macro that came before META:ATTACHMENT
|
|
my $line = '';
|
|
foreach $line ( split( /\r?\n/, $atext ) ) {
|
|
if( $line =~ /%FILEATTACHMENT{\s"([^"]*)"([^}]*)}%/ ) {
|
|
my $name = $1;
|
|
my $values = new TWiki::Attrs( $2 );
|
|
$values->{name} = $name;
|
|
$meta->putKeyed( 'FILEATTACHMENT', $values );
|
|
}
|
|
}
|
|
}
|
|
|
|
return $text;
|
|
}
|
|
|
|
=pod
|
|
|
|
---++ ObjectMethod upgradeFrom1v0beta ( $meta ) -> $text
|
|
|
|
CODE_SMELL: Is this really necessary? upgradeFrom1v0beta?
|
|
|
|
=cut
|
|
|
|
sub upgradeFrom1v0beta {
|
|
my( $this, $meta ) = @_;
|
|
ASSERT($this->isa( 'TWiki::Attach')) if DEBUG;
|
|
|
|
my @attach = $meta->find( 'FILEATTACHMENT' );
|
|
foreach my $att ( @attach ) {
|
|
my $date = $att->{date} || 0;
|
|
if( $date =~ /-/ ) {
|
|
$date =~ s/ / /go;
|
|
$date = TWiki::Time::parseTime( $date );
|
|
}
|
|
$att->{date} = $date;
|
|
my $u = $this->{session}->{users}->findUser( $att->{user} );
|
|
$att->{user} = $u->webDotWikiName() if $u;
|
|
}
|
|
}
|
|
|
|
1;
|