1 package SL::Presenter::Tag;
5 use parent qw(Exporter);
7 use Exporter qw(import);
8 our @EXPORT = qw(html_tag input_tag man_days_tag name_to_id select_tag stringify_attributes);
12 my %_valueless_attributes = map { $_ => 1 } qw(
13 checked compact declare defer disabled ismap multiple noresize noshade nowrap
18 my ($object, $method, @params) = @_;
19 return $object->$method(@params);
23 sub stringify_attributes {
24 my ($self, %params) = @_;
27 while (my ($name, $value) = each %params) {
29 next if $_valueless_attributes{$name} && !$value;
30 $value = '' if !defined($value);
31 push @result, $_valueless_attributes{$name} ? $self->escape($name) : $self->escape($name) . '="' . $self->escape($value) . '"';
34 return @result ? ' ' . join(' ', @result) : '';
38 my ($self, $tag, $content, %params) = @_;
39 my $attributes = $self->stringify_attributes(%params);
41 return "<${tag}${attributes}>" unless defined($content);
42 return "<${tag}${attributes}>${content}</${tag}>";
46 my ($self, $name, $value, %attributes) = @_;
48 $attributes{id} ||= $self->name_to_id($name);
49 $attributes{type} ||= 'text';
51 return $self->html_tag('input', undef, %attributes, name => $name, value => $value);
55 my ($self, $name, $object, %attributes) = @_;
57 my $size = delete($attributes{size}) || 5;
61 my $time_selection = $self->input_tag( "${name}_as_man_days_string", _call_on($object, "${method}_as_man_days_string"), %attributes, size => $size);
62 my $unit_selection = $self->select_tag("${name}_as_man_days_unit", [[ 'h', $::locale->text('h') ], [ 'man_day', $::locale->text('MD') ]],
63 %attributes, default => _call_on($object, "${method}_as_man_days_unit"));
65 return $time_selection . $unit_selection;
69 my ($self, $name) = @_;
71 $name =~ s/[^\w_]/_/g;
78 my ($self, $name, $collection, %attributes) = @_;
80 $attributes{id} ||= $self->name_to_id($name);
82 my $value_key = delete($attributes{value_key}) || 'id';
83 my $title_key = delete($attributes{title_key}) || $value_key;
84 my $default_key = delete($attributes{default_key}) || 'selected';
87 my $value_title_sub = delete($attributes{value_title_sub});
89 my $value_sub = delete($attributes{value_sub});
90 my $title_sub = delete($attributes{title_sub});
91 my $default_sub = delete($attributes{default_sub});
93 my $with_empty = delete($attributes{with_empty});
94 my $empty_title = delete($attributes{empty_title});
96 my $with_optgroups = delete($attributes{with_optgroups});
100 if ( ref($attributes{default}) eq 'ARRAY' ) {
102 foreach my $entry (@{$attributes{default}}) {
103 $selected{$entry} = 1;
105 } elsif ( defined($attributes{default}) ) {
106 $selected{$attributes{default}} = 1;
109 delete($attributes{default});
111 my $normalize_entry = sub {
112 my ($type, $entry, $sub, $key) = @_;
114 return $sub->($entry) if $sub;
116 my $ref = ref($entry);
119 return $entry if $type eq 'value' || $type eq 'title';
123 if ( $ref eq 'ARRAY' ) {
124 return $entry->[ $type eq 'value' ? 0 : $type eq 'title' ? 1 : 2 ];
127 return $entry->{$key} if $ref eq 'HASH';
128 return $entry->$key if $type ne 'default' || $entry->can($key);
132 my $list_to_code = sub {
133 my ($sub_collection) = @_;
136 foreach my $entry ( @{ $sub_collection } ) {
140 if ( $value_title_sub ) {
141 ($value, $title) = @{ $value_title_sub->($entry) };
144 $value = $normalize_entry->('value', $entry, $value_sub, $value_key);
145 $title = $normalize_entry->('title', $entry, $title_sub, $title_key);
148 my $default = $normalize_entry->('default', $entry, $default_sub, $default_key);
150 push(@options, [$value, $title, $default]);
153 foreach my $entry (@options) {
154 $entry->[2] = 1 if $selected{$entry->[0]};
157 return join '', map { $self->html_tag('option', $self->escape($_->[1]), value => $_->[0], selected => $_->[2]) } @options;
161 $code .= $self->html_tag('option', $self->escape($empty_title || ''), value => '') if $with_empty;
163 if (!$with_optgroups) {
164 $code .= $list_to_code->($collection);
167 $code .= join '', map {
168 my ($optgroup_title, $sub_collection) = @{ $_ };
169 $self->html_tag('optgroup', $list_to_code->($sub_collection), label => $optgroup_title)
173 return $self->html_tag('select', $code, %attributes, name => $name);
185 SL::Presenter::Tag - Layouting / tag generation
189 Usage from a template:
193 [% P.select_tag('direction', [ [ 'left', 'To the left' ], [ 'right', 'To the right', 1 ] ]) %]
195 [% P.select_tag('direction', [ { direction => 'left', display => 'To the left' },
196 { direction => 'right', display => 'To the right' } ],
197 value_key => 'direction', title_key => 'display', default => 'right')) %]
199 [% P.select_tag('direction', [ { direction => 'left', display => 'To the left' },
200 { direction => 'right', display => 'To the right', selected => 1 } ],
201 value_key => 'direction', title_key => 'display')) %]
205 A module modeled a bit after Rails' ActionView helpers. Several small
206 functions that create HTML tags from various kinds of data sources.
210 =head2 LOW-LEVEL FUNCTIONS
214 =item C<html_tag $tag_name, $content_string, %attributes>
216 Creates an opening and closing HTML tag for C<$tag_name> and puts
217 C<$content_string> between the two. If C<$content_string> is undefined
218 or empty then only a E<lt>tag/E<gt> tag will be created. Attributes
219 are key/value pairs added to the opening tag.
221 C<$content_string> is not HTML escaped.
223 =item C<name_to_id $name>
225 Converts a name to a HTML id by replacing various characters.
227 =item C<stringify_attributes %items>
229 Creates a string from all elements in C<%items> suitable for usage as
230 HTML tag attributes. Keys and values are HTML escaped even though keys
231 must not contain non-ASCII characters for browsers to accept them.
235 =head2 HIGH-LEVEL FUNCTIONS
239 =item C<input_tag $name, $value, %attributes>
241 Creates a HTML 'input type=text' tag named C<$name> with the value
242 C<$value> and with arbitrary HTML attributes from C<%attributes>. The
243 tag's C<id> defaults to C<name_to_id($name)>.
245 =item C<man_days_tag $name, $object, %attributes>
247 Creates two HTML inputs: a text input for entering a number and a drop
248 down box for chosing the unit (either 'man days' or 'hours').
250 C<$object> must be a L<Rose::DB::Object> instance using the
251 L<SL::DB::Helper::AttrDuration> helper.
253 C<$name> is supposed to be the name of the underlying column,
254 e.g. C<time_estimation> for an instance of
255 C<SL::DB::RequirementSpecItem>. If C<$name> has the form
256 C<prefix.method> then the full C<$name> is used for the input's base
257 names while the methods called on C<$object> are only the suffix. This
258 makes it possible to write statements like e.g.
260 [% P.man_days_tag("requirement_spec_item.time_estimation", SELF.item) %]
262 The attribute C<size> can be used to set the text input's size. It
265 =item C<select_tag $name, \@collection, %attributes>
267 Creates a HTML 'select' tag named C<$name> with the contents of one
268 'E<lt>optionE<gt>' tag for each element in C<\@collection> and with arbitrary
269 HTML attributes from C<%attributes>. The value
270 to use and the title to display are extracted from the elements in
271 C<\@collection>. Each element can be one of four things:
275 =item 1. An array reference with at least two elements. The first element is
276 the value, the second element is its title. The third element is optional and and should contain a boolean.
277 If it is true, than the element will be used as default.
279 =item 2. A scalar. The scalar is both the value and the title.
281 =item 3. A hash reference. In this case C<%attributes> must contain
282 I<value_key>, I<title_key> and may contain I<default_key> keys that name the keys in the element to use
283 for the value, title and default respectively.
285 =item 4. A blessed reference. In this case C<%attributes> must contain
286 I<value_key>, I<title_key> and may contain I<default_key> keys that name functions called on the blessed
287 reference whose return values are used as the value, title and default
292 For cases 3 and 4 C<$attributes{value_key}> defaults to C<id>,
293 C<$attributes{title_key}> defaults to C<$attributes{value_key}>
294 and C<$attributes{default_key}> defaults to C<selected>.
296 In addition to pure keys/method you can also provide coderefs as I<value_sub>
297 and/or I<title_sub> and/or I<default_sub>. If present, these take precedence over keys or methods,
298 and are called with the element as first argument. It must return the value, title or default.
300 Lastly a joint coderef I<value_title_sub> may be provided, which in turn takes
301 precedence over the C<value_sub> and C<title_sub> subs. It will only be called once for each
302 element and must return a list of value and title.
304 If the option C<with_empty> is set then an empty element (value
305 C<undef>) will be used as the first element. The title to display for
306 this element can be set with the option C<empty_title> and defaults to
309 The option C<default> can be either a scalar or an array reference
310 containing the values of the options which should be set to be
313 The tag's C<id> defaults to C<name_to_id($name)>.
315 If the option C<with_optgroups> is set then this function expects
316 C<\@collection> to be one level deeper. The upper-most level is
317 translated into a HTML C<optgroup> tag. So the structure becomes:
321 =item 1. Array of array references. Each element in the
322 C<\@collection> is converted into an optgroup.
324 =item 2. The optgroup's C<label> attribute will be set to the the
325 first element in the array element. The second array element is then
326 converted to a list of C<option> tags like it is described above.
330 Example for use of optgroups:
332 # First in a controller:
334 [ t8("First optgroup with two items"),
335 [ { id => 42, name => "item one" },
336 { id => 54, name => "second item" },
337 { id => 23, name => "and the third one" },
339 [ t8("Another optgroup, with a lot of items from Rose"),
340 SL::DB::Manager::Customer->get_all_sorted ],
343 # Later in the template:
344 [% L.select_tag('the_selection', COLLECTION, with_optgroups=1, title_key='name') %]
354 Moritz Bunkus E<lt>m.bunkus@linet-services.deE<gt>,
355 Sven Schöling E<lt>s.schoeling@linet-services.deE<gt>