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});
113 push @all_options, [undef, $empty_title || ''] if $with_empty;
115 my $normalize_entry = sub {
116 my ($type, $entry, $sub, $key) = @_;
118 return $sub->($entry) if $sub;
120 my $ref = ref($entry);
123 return $entry if $type eq 'value' || $type eq 'title';
127 if ( $ref eq 'ARRAY' ) {
128 return $entry->[ $type eq 'value' ? 0 : $type eq 'title' ? 1 : 2 ];
131 return $entry->{$key} if $ref eq 'HASH';
132 return $entry->$key if $type ne 'default' || $entry->can($key);
136 my $list_to_code = sub {
137 my ($sub_collection) = @_;
140 foreach my $entry ( @{ $sub_collection } ) {
144 if ( $value_title_sub ) {
145 ($value, $title) = @{ $value_title_sub->($entry) };
148 $value = $normalize_entry->('value', $entry, $value_sub, $value_key);
149 $title = $normalize_entry->('title', $entry, $title_sub, $title_key);
152 my $default = $normalize_entry->('default', $entry, $default_sub, $default_key);
154 push(@options, [$value, $title, $default]);
157 foreach my $entry (@options) {
158 $entry->[2] = 1 if $selected{$entry->[0]};
161 return join '', map { $self->html_tag('option', $self->escape($_->[1]), value => $_->[0], selected => $_->[2]) } @options;
166 if (!$with_optgroups) {
167 $code = $list_to_code->($collection);
170 $code = join '', map {
171 my ($optgroup_title, $sub_collection) = @{ $_ };
172 $self->html_tag('optgroup', $list_to_code->($sub_collection), label => $optgroup_title)
176 return $self->html_tag('select', $code, %attributes, name => $name);
188 SL::Presenter::Tag - Layouting / tag generation
192 Usage from a template:
196 [% P.select_tag('direction', [ [ 'left', 'To the left' ], [ 'right', 'To the right', 1 ] ]) %]
198 [% P.select_tag('direction', [ { direction => 'left', display => 'To the left' },
199 { direction => 'right', display => 'To the right' } ],
200 value_key => 'direction', title_key => 'display', default => 'right')) %]
202 [% P.select_tag('direction', [ { direction => 'left', display => 'To the left' },
203 { direction => 'right', display => 'To the right', selected => 1 } ],
204 value_key => 'direction', title_key => 'display')) %]
208 A module modeled a bit after Rails' ActionView helpers. Several small
209 functions that create HTML tags from various kinds of data sources.
213 =head2 LOW-LEVEL FUNCTIONS
217 =item C<html_tag $tag_name, $content_string, %attributes>
219 Creates an opening and closing HTML tag for C<$tag_name> and puts
220 C<$content_string> between the two. If C<$content_string> is undefined
221 or empty then only a E<lt>tag/E<gt> tag will be created. Attributes
222 are key/value pairs added to the opening tag.
224 C<$content_string> is not HTML escaped.
226 =item C<name_to_id $name>
228 Converts a name to a HTML id by replacing various characters.
230 =item C<stringify_attributes %items>
232 Creates a string from all elements in C<%items> suitable for usage as
233 HTML tag attributes. Keys and values are HTML escaped even though keys
234 must not contain non-ASCII characters for browsers to accept them.
238 =head2 HIGH-LEVEL FUNCTIONS
242 =item C<input_tag $name, $value, %attributes>
244 Creates a HTML 'input type=text' tag named C<$name> with the value
245 C<$value> and with arbitrary HTML attributes from C<%attributes>. The
246 tag's C<id> defaults to C<name_to_id($name)>.
248 =item C<man_days_tag $name, $object, %attributes>
250 Creates two HTML inputs: a text input for entering a number and a drop
251 down box for chosing the unit (either 'man days' or 'hours').
253 C<$object> must be a L<Rose::DB::Object> instance using the
254 L<SL::DB::Helper::AttrDuration> helper.
256 C<$name> is supposed to be the name of the underlying column,
257 e.g. C<time_estimation> for an instance of
258 C<SL::DB::RequirementSpecItem>. If C<$name> has the form
259 C<prefix.method> then the full C<$name> is used for the input's base
260 names while the methods called on C<$object> are only the suffix. This
261 makes it possible to write statements like e.g.
263 [% P.man_days_tag("requirement_spec_item.time_estimation", SELF.item) %]
265 The attribute C<size> can be used to set the text input's size. It
268 =item C<select_tag $name, \@collection, %attributes>
270 Creates a HTML 'select' tag named C<$name> with the contents of one
271 'E<lt>optionE<gt>' tag for each element in C<\@collection> and with arbitrary
272 HTML attributes from C<%attributes>. The value
273 to use and the title to display are extracted from the elements in
274 C<\@collection>. Each element can be one of four things:
278 =item 1. An array reference with at least two elements. The first element is
279 the value, the second element is its title. The third element is optional and and should contain a boolean.
280 If it is true, than the element will be used as default.
282 =item 2. A scalar. The scalar is both the value and the title.
284 =item 3. A hash reference. In this case C<%attributes> must contain
285 I<value_key>, I<title_key> and may contain I<default_key> keys that name the keys in the element to use
286 for the value, title and default respectively.
288 =item 4. A blessed reference. In this case C<%attributes> must contain
289 I<value_key>, I<title_key> and may contain I<default_key> keys that name functions called on the blessed
290 reference whose return values are used as the value, title and default
295 For cases 3 and 4 C<$attributes{value_key}> defaults to C<id>,
296 C<$attributes{title_key}> defaults to C<$attributes{value_key}>
297 and C<$attributes{default_key}> defaults to C<selected>.
299 In addition to pure keys/method you can also provide coderefs as I<value_sub>
300 and/or I<title_sub> and/or I<default_sub>. If present, these take precedence over keys or methods,
301 and are called with the element as first argument. It must return the value, title or default.
303 Lastly a joint coderef I<value_title_sub> may be provided, which in turn takes
304 precedence over the C<value_sub> and C<title_sub> subs. It will only be called once for each
305 element and must return a list of value and title.
307 If the option C<with_empty> is set then an empty element (value
308 C<undef>) will be used as the first element. The title to display for
309 this element can be set with the option C<empty_title> and defaults to
312 The option C<default> can be either a scalar or an array reference
313 containing the values of the options which should be set to be
316 The tag's C<id> defaults to C<name_to_id($name)>.
318 If the option C<with_optgroups> is set then this function expects
319 C<\@collection> to be one level deeper. The upper-most level is
320 translated into a HTML C<optgroup> tag. So the structure becomes:
324 =item 1. Array of array references. Each element in the
325 C<\@collection> is converted into an optgroup.
327 =item 2. The optgroup's C<label> attribute will be set to the the
328 first element in the array element. The second array element is then
329 converted to a list of C<option> tags like it is described above.
333 Example for use of optgroups:
335 # First in a controller:
337 [ t8("First optgroup with two items"),
338 [ { id => 42, name => "item one" },
339 { id => 54, name => "second item" },
340 { id => 23, name => "and the third one" },
342 [ t8("Another optgroup, with a lot of items from Rose"),
343 SL::DB::Manager::Customer->get_all_sorted ],
346 # Later in the template:
347 [% L.select_tag('the_selection', COLLECTION, with_optgroups=1, title_key='name') %]
357 Moritz Bunkus E<lt>m.bunkus@linet-services.deE<gt>,
358 Sven Schöling E<lt>s.schoeling@linet-services.deE<gt>