Revision 8177c150
Von Moritz Bunkus vor fast 15 Jahren hinzugefügt
| SL/Template/Plugin/L.pm | ||
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package SL::Template::Plugin::L;
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use base qw( Template::Plugin );
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use Template::Plugin;
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use strict;
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sub new {
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my $class = shift;
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my $context = shift;
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return bless { }, $class;
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}
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sub attributes {
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my $self = shift;
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my $options = shift || {};
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my @result = ();
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while (my ($name, $value) = each %{ $options }) {
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next unless $name;
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$value ||= '';
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push @result, "${name}=\"" . $::locale->quote_special_chars('HTML', $value) . '"';
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}
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return @result ? ' ' . join(' ', @result) : '';
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}
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sub html_tag {
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my $self = shift;
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my $tag = shift;
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my $content = shift;
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my $attributes = $self->attributes(shift || {});
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return "<${tag}${attributes}/>" unless $content;
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return "<${tag}${attributes}>${content}</${tag}>";
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}
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sub select_tag {
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my $self = shift;
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my $name = shift;
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my $options_str = shift;
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my $attributes = shift || {};
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$attributes->{name} = $name;
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$attributes->{id} ||= $name;
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return $self->html_tag('select', $options_str, $attributes);
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}
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sub options_for_select {
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my $self = shift;
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my $collection = shift;
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my $options = shift || {};
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my $value_key = $options->{value} || 'id';
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my $title_key = $options->{title} || $value_key;
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my @tags = ();
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if ($collection && (ref $collection eq 'ARRAY')) {
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foreach my $element (@{ $collection }) {
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my @result = !ref $element ? ( $element, $element )
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: ref $element eq 'ARRAY' ? ( $element->[0], $element->[1] )
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: ref $element eq 'HASH' ? ( $element->{$value_key}, $element->{$title_key} )
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: ( $element->$value_key, $element->$title_key );
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my %attributes = ( value => $result[0] );
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$attributes{selected} = 'selected' if $options->{default} && ($options->{default} eq ($result[0] || ''));
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push @tags, $self->html_tag('option', $result[1], \%attributes);
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}
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}
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return join('', @tags);
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}
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1;
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__END__
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=head1 NAME
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SL::Templates::Plugin::L -- Layouting / tag generation
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=head1 SYNOPSIS
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Usage from a template:
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[% USE L %]
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[% L.select_tag('direction', [ [ 'left', 'To the left' ], [ 'right', 'To the right' ] ]) %]
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[% L.select_tag('direction', L.options_for_select([ { direction => 'left', display => 'To the left' },
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{ direction => 'right', display => 'To the right' } ],
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value => 'direction', title => 'display', default => 'right')) %]
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=head1 DESCRIPTION
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A module modeled a bit after Rails' ActionView helpers. Several small
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functions that create HTML tags from various kinds of data sources.
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=head1 FUNCTIONS
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=over 4
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=item C<attributes \%items>
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Creates a string from all elements in C<\%items> suitable for usage as
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HTML tag attributes. Keys and values are HTML escaped even though keys
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must not contain non-ASCII characters for browsers to accept them.
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=item C<html_tag $tag_name, $content_string, \%attributes>
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Creates an opening and closing HTML tag for C<$tag_name> and puts
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C<$content_string> between the two. If C<$content_string> is undefined
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or empty then only a E<lt>tag/E<gt> tag will be created. Attributes
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are key/value pairs added to the opening tag.
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=item C<options_for_select \@collection, \%options>
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Creates a string suitable for a HTML 'select' tag consisting of one
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'E<lt>optionE<gt>' tag for each element in C<\@collection>. The value
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to use and the title to display are extracted from the elements in
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C<\@collection>. Each element can be one of four things:
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=over 12
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=item 1. An array reference with at least two elements. The first element is
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the value, the second element is its title.
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=item 2. A scalar. The scalar is both the value and the title.
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=item 3. A hash reference. In this case C<\%options> must contain
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I<value> and I<title> keys that name the keys in the element to use
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for the value and title respectively.
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=item 4. A blessed reference. In this case C<\%options> must contain
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I<value> and I<title> keys that name functions called on the blessed
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reference whose return values are used as the value and title
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respectively.
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=back
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For cases 3 and 4 C<$options{value}> defaults to C<id> and
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C<$options{title}> defaults to C<$options{value}>.
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=item C<select_tag $name, $options_string, \%attributes>
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Creates a HTML 'select' tag named $name with the contents
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$options_string and with arbitrary HTML attributes from
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C<\%attributes>. The tag's C<id> defaults to C<$name>.
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The $options_string is usually created by the C<options_for_select>
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function.
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=back
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=head1 MODULE AUTHORS
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Moritz Bunkus E<lt>m.bunkus@linet-services.deE<gt>
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L<http://linet-services.de>
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Auch abrufbar als: Unified diff
Ein Plugin zum Erzeugen von HTML-Tags auf die Rails-Art.