/usr/share/perl5/HTML/Widgets/SelectLayers.pm is in libhtml-widgets-selectlayers-perl 0.07-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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use strict;
use vars qw($VERSION);
$VERSION = '0.07';
=head1 NAME
HTML::Widgets::SelectLayers - Perl extension for selectable HTML layers
=head1 SYNOPSIS
use HTML::Widgets::SelectLayers;
use Tie::IxHash;
tie my %options, 'Tie::IxHash',
'value' => 'Select One',
'value2' => 'Select Two',
;
$widget = new HTML::Widgets::SelectLayers(
'options' => \%options,
'form_name' => 'dummy',
'form_action' => 'process.cgi',
#new code auto-detects form types (radio not yet supported)
#'form_elements' => [ qw( textfield1 textfield2 checkbox1 radio1 select1 ) ],
'form_elements' => [ qw( textfield1 textfield2 checkbox1 radio1 select1 ) ],
#deprecated style still works for now
#'form_text' => [ qw( textfield1 textfield2 ) ],
#'form_checkbox' => [ qw( checkbox1 ) ],
#'form_radio' => [ qw( radio1 ) ],
#'form_select' => [ qw( select1 ) ],
'layer_callback' => sub {
my $layer = shift;
my $html = qq!<INPUT TYPE="hidden" NAME="layer" VALUE="$layer">!;
$html .= $other_stuff;
$html;
},
);
print '<FORM NAME=dummy STYLE="margin-top: 0; margin-bottom: 0">'.
'<INPUT TYPE="text" NAME="textfield1">'.
'<INPUT TYPE="text" NAME="textfield2">'.
'<INPUT TYPE="checkbox" NAME="checkbox1" VALUE="Y">'.
$widget->html;
=head1 DESCRIPTION
This module implements an HTML widget with multiple layers. Only one layer
is visible at any given time, controlled by a E<lt>SELECTE<gt> box. For an
example see http://www.420.am/selectlayers/
This HTML generated by this module uses JavaScript, but nevertheless attempts
to be as cross-browser as possible. The 0.05 release drops Navigator 4
compatibility and has been tested under Mozilla Firefox 1.0.6, MSIE 6.0,
Konqueror 3.3.2, and Opera 8.0.2 (2006 note: still working under newer
browsers such as IE7, Firefox 2.0, etc.).
=head1 FORMS
My understanding is that forms cannot span E<lt>DIVE<gt>s elements. The
generated HTML will have a E<lt>/FORME<gt> tag before the layers and will
generate E<lt>FORME<gt> and E<lt>/FORME<gt> tags for each layer. To facilitate
E<lt>SUBMITE<gt> buttons located within the layers, you can pass a form name
and element names, and the relevant values will be copied to the layer's form.
See the B<form_> options below.
=head1 METHODS
=over 4
=item new KEY, VALUE, KEY, VALUE...
Options are passed as name/value pairs:
options - Hash reference of layers and labels for the E<lt>SELECTE<gt>. See
L<Tie::IxHash> to control ordering.
In HTML: E<lt>OPTION VALUE="$layer"E<gt>$labelE<lt>/OPTIONE<gt>
layer_callback - subroutine reference to create each layer. The layer name
is passed as an option in I<@_>
selected_layer - (optional) initially selected layer
form_name - (optional) Form name to copy values from. If not supplied, no
values will be copied.
form_action - Form action
form_elements - (optional) Array reference of form fields to copy from the
B<form_name> form. Field type is autodetected; currently
text, hidden, checkbox, and select fields are
supported. Radio fields are not yet supported.
form_text - (optional) Array reference of text (or hidden) form fields to copy
from the B<form_name> form.
form_checkbox - (optional) Array reference of checkbox form fields to copy from
the B<form_name> form.
form_radio - (optional) Array reference of radio form fields to copy from the
B<form_name> form.
form_select - (optional) Array reference of select form fields to copy from
the B<form_name> form.
fixup_callback - (optional) subroutine reference, returns supplimentary
JavaScript for the function described above under FORMS.
size - (optional) size of the E<lt>SELECTE<gt>, default 1.
unique_key - (optional) prepended to all JavaScript function/variable/object
names to avoid namespace collisions.
html_beween - (optional) HTML between the E<lt>SELECTE<gt> and the layers.
under_position - (optional) specifies the positioning of any HTML appearing after the widget. I<static>, the default, positions subsequent HTML underneath the current layer (or immediately under the select box if no layer has yet been selected), reflowing when layers are changed. I<absolute> calculates the size of the largest layer and keeps the subsequent HTML in a single position underneath it. Note that I<absolute> works by positioning subsequent HTML in a E<lt>DIVE<gt>, so you should probably close it yourself with a E<lt>/DIVE<gt> before your E<lt>/HTMLE<gt> end tag. I<absolute> is a bit experimental and might have some quirks with truncating the end of the page under IE; you might have better results by just making all your layers the exact same size at the moment.
=cut
sub new {
my($proto, %options) = @_;
my $class = ref($proto) || $proto;
my $self = \%options;
bless($self, $class);
}
=pod
=item html
Returns HTML for the widget.
=cut
sub html {
my $self = shift;
my $key = exists($self->{unique_key}) ? $self->{unique_key} : '';
my $between = exists($self->{html_between}) ? $self->{html_between} : '';
my $options = $self->{options};
my $form_action = exists($self->{form_action}) ? $self->{form_action} : '';
my $form_elements =
exists($self->{form_elements}) ? $self->{form_elements} : [];
my $form_text =
exists($self->{form_text}) ? $self->{form_text} : [];
my $form_checkbox =
exists($self->{form_checkbox}) ? $self->{form_checkbox} : [];
my $form_radio =
exists($self->{form_radio}) ? $self->{form_radio} : [];
my $form_select =
exists($self->{form_select}) ? $self->{form_select} : [];
my $under_position =
exists($self->{under_position}) ? $self->{under_position} : 'static';
my $hidden = lc($under_position) eq 'absolute'
? 'visibility: hidden; position: absolute; z-index: 0'
: 'display: none; z-index: 0';
#my $show = lc($under_position) eq 'absolute'
# ? 'visibility: visible'
# : 'display: "" ';
my $html = $self->_safeonload.
$self->_visualize.
"<SCRIPT>SafeAddOnLoad(${key}visualize)</SCRIPT>".
$self->_changed.
$self->_fixup.
$self->_select. $between. '</FORM>'.
"<SCRIPT>var ${key}maxHeight = 0;</SCRIPT>";
#foreach my $layer ( 'konq_kludge', keys %$options ) {
foreach my $layer ( keys %$options ) {
#start layer
$html .= <<END;
<DIV ID="${key}d$layer" STYLE="$hidden">
END
#form fields
$html .= <<END;
<FORM NAME="${key}$layer" ACTION="$form_action" METHOD=POST onsubmit="${key}fixup(this)" STYLE="margin-top: 0; margin-bottom: 0">
END
foreach my $f ( @$form_elements, @$form_text, @$form_checkbox, @$form_radio, @$form_select )
{
$html .= <<END;
<INPUT TYPE="hidden" NAME="$f" VALUE="">
END
}
#layer
$html .= &{$self->{layer_callback}}($layer);
#end form & layer
$html .= <<END
</FORM>
</DIV>
<SCRIPT>
if ( document.getElementById('${key}d$layer').offsetHeight > ${key}maxHeight )
${key}maxHeight = document.getElementById('${key}d$layer').offsetHeight;
</SCRIPT>
END
}
if ( $under_position eq 'absolute' ) {
$html .= <<END;
<SCRIPT>
//var max = ${key}maxHeight;
document.write("<DIV STYLE=\\\"position:relative; top: " + ${key}maxHeight + "px\\\">");
</SCRIPT>
END
}
$html;
}
sub _fixup {
my $self = shift;
my $key = exists($self->{unique_key}) ? $self->{unique_key} : '';
my $form_name = $self->{form_name} or return '';
my $form_elements =
exists($self->{form_elements}) ? $self->{form_elements} : [];
my $form_text =
exists($self->{form_text}) ? $self->{form_text} : [];
my $form_checkbox =
exists($self->{form_checkbox}) ? $self->{form_checkbox} : [];
my $form_radio =
exists($self->{form_radio}) ? $self->{form_radio} : [];
my $form_select =
exists($self->{form_select}) ? $self->{form_select} : [];
my $html = <<END;
<SCRIPT>
function copyelement(from, to) {
if ( from.type == undefined ) {
to.value = '';
} else if ( from.type == 'select-one' ) {
to.value = from.options[from.selectedIndex].value;
//alert(from + " (" + from.type + "): " + to.name + " => (" + from.selectedIndex + ") " + to.value);
} else if ( from.type == 'select-multiple' ) {
var i = 0;
var count = 0;
var values = new Array();
for (i=0;i<from.length;i++) {
if (from.options[i].selected){
values[count++] = from.options[i].value;
}
}
for (i=0;i<values.length-1;i++) {
var clone = to.cloneNode(true);
clone.value = values[i];
to.form.appendChild(clone);
}
if (count > 0) {
to.value = values[values.length-1];
}else{
to.value = '';
}
} else if ( from.type == 'checkbox' ) {
if ( from.checked ) {
to.value = from.value;
} else {
to.value = '';
}
// } else if ( from.type == 'radio' ) {
} else {
if ( from.value == undefined ) {
to.value = '';
} else {
to.value = from.value;
}
}
//alert(from + " (" + from.type + "): " + to.name + " => " + to.value);
}
END
$html .= "
//function ${key}fchanged(what) {
// ${key}fixup(what.form);
//}
function ${key}fixup(what) {\n";
foreach my $f ( @$form_elements ) {
$html .= "copyelement( document.$form_name.elements['$f'],
what.elements['$f']
)\n";
}
foreach my $f ( @$form_text ) {
$html .= "what.$f.value = document.$form_name.$f.value;\n";
}
foreach my $f ( @$form_checkbox ) {
$html .= "if (document.$form_name.$f.checked)
what.$f.value = document.$form_name.$f.value;
else
what.$f.value = '';\n"
}
foreach my $f ( @$form_radio ) {
$html .= "what.$f.value = '';
for ( i=0; i< document.$form_name.$f.length; i++ )
if ( document.$form_name.$f\[i].checked )
what.$f.value = document.$form_name.$f\[i].value;\n";
}
foreach my $f ( @$form_select ) {
$html .= "what.$f.value = document.$form_name.$f.options[document.$form_name.$f.selectedIndex].value;\n";
}
$html .= &{$self->{fixup_callback}}() if exists($self->{fixup_callback});
$html .= "}\n</SCRIPT>";
$html;
}
sub _select {
my $self = shift;
my $key = exists($self->{unique_key}) ? $self->{unique_key} : '';
my $options = $self->{options};
my $selected = exists($self->{selected_layer}) ? $self->{selected_layer} : '';
my $size = exists($self->{size}) ? $self->{size} : 1;
my $html = "
<SELECT NAME=\"${key}select\" SIZE=$size onChange=\"${key}changed(this);\">
";
foreach my $option ( keys %$options ) {
$html .= qq(<OPTION VALUE="$option");
$html .= ' SELECTED' if $option eq $selected;
$html .= '>'. $options->{$option}. '</OPTION>';
}
$html .= '</SELECT>';
}
sub _changed {
my $self = shift;
my $key = exists($self->{unique_key}) ? $self->{unique_key} : '';
my $options = $self->{options};
my $under_position =
exists($self->{under_position}) ? $self->{under_position} : 'static';
my $html = "
<SCRIPT>
var ${key}layer = null;
function ${key}changed(what) {
${key}layer = what.options[what.selectedIndex].value;\n";
foreach my $layer ( keys %$options ) {
$html .= qq( if (${key}layer == "$layer" ) {\n);
foreach my $not ( grep { $_ ne $layer } keys %$options ) {
my $element_style = "document.getElementById('${key}d$not').style";
if ( $under_position eq 'absolute' ) {
$html .= qq( $element_style.visibility = "hidden";\n);
} else {
$html .= qq( $element_style.display = "none";\n);
}
$html .= qq( $element_style.zIndex = 0;\n);
}
my $element_style = "document.getElementById('${key}d$layer').style";
if ( $under_position eq 'absolute' ) {
$html .= qq( $element_style.visibility = "visible";\n);
} else {
$html .= qq( $element_style.display = "";\n);
}
$html .= qq( $element_style.zIndex = 1;\n);
$html .= " }\n";
}
$html .= "}\n</SCRIPT>";
$html;
}
sub _visualize {
my $self = shift;
my $key = exists($self->{unique_key}) ? $self->{unique_key} : '';
return '' unless exists($self->{selected_layer});
my $selected = $self->{selected_layer};
my $under_position =
exists($self->{under_position}) ? $self->{under_position} : 'static';
my $display = ( $under_position eq 'absolute' )
? 'visibility = "visible"'
: 'display = ""';
<<END;
<SCRIPT>
function ${key}visualize() {
document.getElementById('${key}d$selected').style.$display;
document.getElementById('${key}d$selected').style.zIndex = 1;
}
</SCRIPT>
END
}
sub _safeonload {
<<END;
<SCRIPT>
var gSafeOnload = new Array();
function SafeAddOnLoad(f) {
if (window.onload) {
if (window.onload != SafeOnload) {
gSafeOnload[0] = window.onload;
window.onload = SafeOnload;
}
gSafeOnload[gSafeOnload.length] = f;
} else {
window.onload = f;
}
}
function SafeOnload()
{
for (var i=0;i<gSafeOnload.length;i++)
gSafeOnload[i]();
}
</SCRIPT>
END
}
=back
=head1 AUTHOR
Ivan Kohler E<lt>ivan-selectlayers@420.amE<gt>
=head1 COPYRIGHT
Copyright (c) 2002-2005 Ivan Kohler
All rights reserved.
This program is free software; you can redistribute it and/or modify it under
the same terms as Perl itself.
=head1 BUGS
JavaScript
All the different form_* options are unnecessary, could use .type to auto-sense
Could give you a function or something for copying variables out of the
layered forms.
=head1 SEE ALSO
L<perl>. L<Tie::IxHash>, http://www.xs4all.nl/~ppk/js/dom.html,
http://javascript.about.com/library/scripts/blsafeonload.htm
=cut
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