1 package Reaction::UI::View;
5 # declaring dependencies
6 use Reaction::UI::LayoutSet;
7 use Reaction::UI::RenderingContext;
8 use aliased 'Reaction::UI::Skin';
9 use aliased 'Path::Class::Dir';
11 use namespace::clean -except => [ qw(meta) ];
14 has '_widget_cache' => (is => 'ro', default => sub { {} });
16 has '_layout_set_cache' => (is => 'ro', default => sub { {} });
18 has 'app' => (is => 'ro', required => 1);
20 has 'skin_name' => (is => 'ro', required => 1, default => 'default');
23 is => 'ro', lazy_build => 1,
24 handles => [ qw(create_layout_set search_path_for_type) ]
27 has 'layout_set_class' => (is => 'ro', lazy_build => 1);
29 has 'rendering_context_class' => (is => 'ro', lazy_build => 1);
31 # default view doesn't localize
33 my($self, $value) = @_;
37 sub _build_layout_set_class {
39 return $self->find_related_class('LayoutSet');
41 sub _build_rendering_context_class {
43 return $self->find_related_class('RenderingContext');
48 name => $self->skin_name, view => $self,
49 # path_to returns a File, not a Dir. Thanks, Catalyst.
50 skin_base_dir => Dir->new($self->app->path_to('share', 'skin')),
54 my ($class, $app, $args) = @_;
55 return $class->new(%{$args||{}}, app => $app);
58 my ($self, $window) = @_;
59 my $root_vp = $window->focus_stack->vp_head;
60 my $rctx = $self->create_rendering_context;
61 my ($widget, $args) = $self->render_viewport_args($root_vp);
62 $widget->render(widget => $rctx, $args);
64 sub render_viewport_args {
66 my $layout_set = $self->layout_set_for($vp);
67 my $widget = $self->widget_for($vp, $layout_set);
68 return ($widget, { viewport => $vp });
71 my ($self, $vp, $layout_set) = @_;
73 $self->_widget_cache->{$layout_set->name}
74 ||= $layout_set->widget_class
76 view => $self, layout_set => $layout_set
81 my $lset_name = eval { $vp->layout };
82 confess "Couldn't call layout method on \$vp arg ${vp}: $@" if $@;
83 $lset_name = $self->layout_set_name_from_viewport( blessed($vp) )
84 unless (length($lset_name));
85 my $cache = $self->_layout_set_cache;
86 return $cache->{$lset_name} ||= $self->create_layout_set($lset_name);
89 #XXX if it ever comes to it: this could be memoized. not bothering yet.
90 sub layout_set_name_from_viewport {
91 my ($self, $class) = @_;
92 my ($last) = ($class =~ /.*(?:::ViewPort::)(.+?)$/);
93 #split when a non-uppercase letter meets an uppercase or when an
94 #uppercase letter is followed by another uppercase and then a non-uppercase
95 #FooBar = foo_bar; Foo_Bar = foo_bar; FOOBar = foo_bar; FooBAR = foo_bar
97 join("_", split(/(?:(?<=[A-Z])(?=[A-Z][^_A-Z])|(?<=[^_A-Z])(?=[A-Z]))/, $_))
99 return lc(join('/', @fragments));
101 sub layout_set_file_extension {
102 confess View." is abstract, you must subclass it";
104 sub find_related_class {
105 my ($self, $rel) = @_;
106 my $own_class = ref($self) || $self;
107 confess View." is abstract, you must subclass it" if $own_class eq View;
108 foreach my $super ($own_class->meta->class_precedence_list) {
109 next if $super eq View;
110 if ($super =~ /::View::/) {
111 (my $class = $super) =~ s/::View::/::${rel}::/;
112 if (eval { Class::MOP::load_class($class) }) {
117 confess "Unable to find related ${rel} class for ${own_class}";
119 sub create_rendering_context {
120 my ($self, @args) = @_;
121 return $self->rendering_context_class->new(
122 $self->rendering_context_args_for(@args),
126 sub rendering_context_args_for {
129 sub layout_set_args_for {
133 __PACKAGE__->meta->make_immutable;
139 Reaction::UI::View - Render the UI.
143 package MyApp::View::TT;
144 use base 'Reaction::UI::View::TT';
147 skin_name => 'MyApp',
150 ## In the Window class:
151 $res->body($self->view->render_window($self));
155 Render the viewports in the current window using the chosen skin and
156 layoutset, via the matching widgets.
162 =item L<Reaction::UI::Controller::Root>
163 =item L<Reaction::UI::ViewPort>
164 =item L<Reaction::UI::Window>
165 =item L<Reaction::UI::LayoutSet>
166 =item L<Reaction::UI::Widget>
176 =item Arguments: $app?
180 The application L<Catalyst> class. This is set at
181 L<Catalyst/COMPONENT> time for you.
187 =item Arguments: $skinname?
191 The name of the skin to use to render the pages. This should be the
192 name of a subdirectory under the F<share/skin> in your application
193 directory. The default skin name is C<default>, the default skin is
194 provided with Reaction.
196 See also: L<Reaction::UI::Skin>
202 =item Arguments: $skin?
206 A L<Reaction::UI::Skin> object based on the L</skin_name>. It will be
207 created for you if not provided.
209 =head2 layout_set_class
211 The class of the L<Reaction::UI::LayoutSet> used to layout the
212 view. Defaults to searching down the precedence tree of the View class
213 looking for a class of the same name with C<View> replaced with
216 =head2 rendering_context_class
218 The class of the L<Reaction::UI::RenderingContext> used to layout the
219 view. Defaults to searching down the precedence tree of the View class
220 looking for a class of the same name with C<View> replaced with
227 See L<Reaction::Class> for authors.
231 See L<Reaction::Class> for the license.