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# See bottom of file for copyright and license details
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---+ package Foswiki::If::OP_isempty
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package Foswiki::If::OP_isempty;
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use base 'Foswiki::Query::UnaryOP';
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return $class->SUPER::new( name => 'isempty', prec => 600 );
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my $a = $node->{params}->[0];
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my $session = $domain{tom}->session;
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'No context in which to evaluate "' . $a->stringify() . '"' )
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my $eval = $a->_evaluate(@_);
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return 1 unless $eval;
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return 0 if ( $session->{request}->param($eval) );
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return 0 if ( $session->{prefs}->getPreferencesValue($eval) );
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return 0 if ( $session->{SESSION_TAGS}{$eval} );
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Module of Foswiki - The Free and Open Source Wiki, http://foswiki.org/, http://Foswiki.org/
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Copyright (C) 2005-2009 Foswiki Contributors. All Rights Reserved.
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Foswiki Contributors are listed in the AUTHORS file in the root of
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this distribution. NOTE: Please extend that file, not this notice.
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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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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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As per the GPL, removal of this notice is prohibited.
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Author: Rafael Alvarez (http://www.soronthar.com)