1 package SL::Presenter::Tag;
5 use parent qw(Exporter);
7 use Exporter qw(import);
8 our @EXPORT = qw(html_tag input_tag name_to_id select_tag stringify_attributes);
12 my %_valueless_attributes = map { $_ => 1 } qw(
13 checked compact declare defer disabled ismap multiple noresize noshade nowrap
17 sub stringify_attributes {
18 my ($self, %params) = @_;
21 while (my ($name, $value) = each %params) {
23 next if $_valueless_attributes{$name} && !$value;
24 $value = '' if !defined($value);
25 push @result, $_valueless_attributes{$name} ? $self->escape($name) : $self->escape($name) . '="' . $self->escape($value) . '"';
28 return @result ? ' ' . join(' ', @result) : '';
32 my ($self, $tag, $content, %params) = @_;
33 my $attributes = $self->stringify_attributes(%params);
35 return "<${tag}${attributes}>" unless defined($content);
36 return "<${tag}${attributes}>${content}</${tag}>";
40 my ($self, $name, $value, %attributes) = @_;
42 $attributes{id} ||= $self->name_to_id($name);
43 $attributes{type} ||= 'text';
45 return $self->html_tag('input', undef, %attributes, name => $name, value => $value);
49 my ($self, $name) = @_;
51 $name =~ s/[^\w_]/_/g;
58 my ($self, $name, $collection, %attributes) = @_;
60 $attributes{id} ||= $self->name_to_id($name);
62 my $value_key = delete($attributes{value_key}) || 'id';
63 my $title_key = delete($attributes{title_key}) || $value_key;
64 my $default_key = delete($attributes{default_key}) || 'selected';
67 my $value_title_sub = delete($attributes{value_title_sub});
69 my $value_sub = delete($attributes{value_sub});
70 my $title_sub = delete($attributes{title_sub});
71 my $default_sub = delete($attributes{default_sub});
73 my $with_empty = delete($attributes{with_empty});
74 my $empty_title = delete($attributes{empty_title});
76 my $with_optgroups = delete($attributes{with_optgroups});
80 if ( ref($attributes{default}) eq 'ARRAY' ) {
82 foreach my $entry (@{$attributes{default}}) {
83 $selected{$entry} = 1;
85 } elsif ( defined($attributes{default}) ) {
86 $selected{$attributes{default}} = 1;
89 delete($attributes{default});
93 push @all_options, [undef, $empty_title || ''] if $with_empty;
95 my $normalize_entry = sub {
96 my ($type, $entry, $sub, $key) = @_;
98 return $sub->($entry) if $sub;
100 my $ref = ref($entry);
103 return $entry if $type eq 'value' || $type eq 'title';
107 if ( $ref eq 'ARRAY' ) {
108 return $entry->[ $type eq 'value' ? 0 : $type eq 'title' ? 1 : 2 ];
111 return $entry->{$key} if $ref eq 'HASH';
112 return $entry->$key if $type ne 'default' || $entry->can($key);
116 my $list_to_code = sub {
117 my ($sub_collection) = @_;
120 foreach my $entry ( @{ $sub_collection } ) {
124 if ( $value_title_sub ) {
125 ($value, $title) = @{ $value_title_sub->($entry) };
128 $value = $normalize_entry->('value', $entry, $value_sub, $value_key);
129 $title = $normalize_entry->('title', $entry, $title_sub, $title_key);
132 my $default = $normalize_entry->('default', $entry, $default_sub, $default_key);
134 push(@options, [$value, $title, $default]);
137 foreach my $entry (@options) {
138 $entry->[2] = 1 if $selected{$entry->[0]};
141 return join '', map { $self->html_tag('option', $self->escape($_->[1]), value => $_->[0], selected => $_->[2]) } @options;
146 if (!$with_optgroups) {
147 $code = $list_to_code->($collection);
150 $code = join '', map {
151 my ($optgroup_title, $sub_collection) = @{ $_ };
152 $self->html_tag('optgroup', $list_to_code->($sub_collection), label => $optgroup_title)
156 return $self->html_tag('select', $code, %attributes, name => $name);
168 SL::Presenter::Tag - Layouting / tag generation
172 Usage from a template:
176 [% P.select_tag('direction', [ [ 'left', 'To the left' ], [ 'right', 'To the right', 1 ] ]) %]
178 [% P.select_tag('direction', [ { direction => 'left', display => 'To the left' },
179 { direction => 'right', display => 'To the right' } ],
180 value_key => 'direction', title_key => 'display', default => 'right')) %]
182 [% P.select_tag('direction', [ { direction => 'left', display => 'To the left' },
183 { direction => 'right', display => 'To the right', selected => 1 } ],
184 value_key => 'direction', title_key => 'display')) %]
188 A module modeled a bit after Rails' ActionView helpers. Several small
189 functions that create HTML tags from various kinds of data sources.
193 =head2 LOW-LEVEL FUNCTIONS
197 =item C<html_tag $tag_name, $content_string, %attributes>
199 Creates an opening and closing HTML tag for C<$tag_name> and puts
200 C<$content_string> between the two. If C<$content_string> is undefined
201 or empty then only a E<lt>tag/E<gt> tag will be created. Attributes
202 are key/value pairs added to the opening tag.
204 C<$content_string> is not HTML escaped.
206 =item C<name_to_id $name>
208 Converts a name to a HTML id by replacing various characters.
210 =item C<stringify_attributes %items>
212 Creates a string from all elements in C<%items> suitable for usage as
213 HTML tag attributes. Keys and values are HTML escaped even though keys
214 must not contain non-ASCII characters for browsers to accept them.
218 =head2 HIGH-LEVEL FUNCTIONS
222 =item C<input_tag $name, $value, %attributes>
224 Creates a HTML 'input type=text' tag named C<$name> with the value
225 C<$value> and with arbitrary HTML attributes from C<%attributes>. The
226 tag's C<id> defaults to C<name_to_id($name)>.
228 =item C<select_tag $name, \@collection, %attributes>
230 Creates a HTML 'select' tag named C<$name> with the contents of one
231 'E<lt>optionE<gt>' tag for each element in C<\@collection> and with arbitrary
232 HTML attributes from C<%attributes>. The value
233 to use and the title to display are extracted from the elements in
234 C<\@collection>. Each element can be one of four things:
238 =item 1. An array reference with at least two elements. The first element is
239 the value, the second element is its title. The third element is optional and and should contain a boolean.
240 If it is true, than the element will be used as default.
242 =item 2. A scalar. The scalar is both the value and the title.
244 =item 3. A hash reference. In this case C<%attributes> must contain
245 I<value_key>, I<title_key> and may contain I<default_key> keys that name the keys in the element to use
246 for the value, title and default respectively.
248 =item 4. A blessed reference. In this case C<%attributes> must contain
249 I<value_key>, I<title_key> and may contain I<default_key> keys that name functions called on the blessed
250 reference whose return values are used as the value, title and default
255 For cases 3 and 4 C<$attributes{value_key}> defaults to C<id>,
256 C<$attributes{title_key}> defaults to C<$attributes{value_key}>
257 and C<$attributes{default_key}> defaults to C<selected>.
259 In addition to pure keys/method you can also provide coderefs as I<value_sub>
260 and/or I<title_sub> and/or I<default_sub>. If present, these take precedence over keys or methods,
261 and are called with the element as first argument. It must return the value, title or default.
263 Lastly a joint coderef I<value_title_sub> may be provided, which in turn takes
264 precedence over the C<value_sub> and C<title_sub> subs. It will only be called once for each
265 element and must return a list of value and title.
267 If the option C<with_empty> is set then an empty element (value
268 C<undef>) will be used as the first element. The title to display for
269 this element can be set with the option C<empty_title> and defaults to
272 The option C<default> can be either a scalar or an array reference
273 containing the values of the options which should be set to be
276 The tag's C<id> defaults to C<name_to_id($name)>.
278 If the option C<with_optgroups> is set then this function expects
279 C<\@collection> to be one level deeper. The upper-most level is
280 translated into a HTML C<optgroup> tag. So the structure becomes:
284 =item 1. Array of array references. Each element in the
285 C<\@collection> is converted into an optgroup.
287 =item 2. The optgroup's C<label> attribute will be set to the the
288 first element in the array element. The second array element is then
289 converted to a list of C<option> tags like it is described above.
293 Example for use of optgroups:
295 # First in a controller:
297 [ t8("First optgroup with two items"),
298 [ { id => 42, name => "item one" },
299 { id => 54, name => "second item" },
300 { id => 23, name => "and the third one" },
302 [ t8("Another optgroup, with a lot of items from Rose"),
303 SL::DB::Manager::Customer->get_all_sorted ],
306 # Later in the template:
307 [% L.select_tag('the_selection', COLLECTION, with_optgroups=1, title_key='name') %]
317 Moritz Bunkus E<lt>m.bunkus@linet-services.deE<gt>,
318 Sven Schöling E<lt>s.schoeling@linet-services.deE<gt>