# Copyright (c) 2010 bivio Software Inc.  All Rights Reserved.
#
# Visit http://www.bivio.biz for more info.
# 
# This library is free software; you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as
# published by the Free Software Foundation; either version 2.1 of the
# License, or (at your option) any later version.
# 
# This library is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Lesser General Public License for more details.
# 
# You should have received a copy of the GNU Lesser General Public
# License along with this library;  If not, you may get a copy from:
# http://www.opensource.org/licenses/lgpl-license.html
# 
# $Id: CopyListValueHandler.pm,v 2.1 2010/10/22 22:51:08 moeller Exp $
package Bivio::UI::HTML::Widget::CopyListValueHandler;
use strict;
use Bivio::Base 'UI.Widget';
my($_JS) = b_use('HTMLWidget.JavaScript');

our($VERSION) = sprintf('%d.%02d', q$Revision: 2.1 $ =~ /\d+/g);

sub get_html_field_attributes {
    my($self, $field_name, $source) = @_;
    return ' onfocus="cr_focus(this)"';
}

sub render {
    my($self, $source, $buffer) = @_;
    $_JS->render($source, $buffer, $self->package_name, <<'EOF');
function cr_focus(c) {
  if (c.value)
    return;
  var match = ner_match_name(c.name);
  var prev = document.getElementsByName(match[1] + (parseInt(match[2]) - 1));
  if (prev.length)
    c.value = prev[0].value;
  return;
}
EOF
    return;
}

1;