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package Reaction::UI::View;
use Reaction::Class;
# declaring dependencies
use Reaction::UI::LayoutSet;
use Reaction::UI::RenderingContext;
use aliased 'Reaction::UI::Skin';
use aliased 'Path::Class::Dir';
class View which {
has '_widget_class_cache' => (is => 'ro', default => sub { {} });
has '_widget_cache' => (is => 'ro', default => sub { {} });
has '_layout_set_cache' => (is => 'ro', default => sub { {} });
has 'app' => (is => 'ro', required => 1);
has 'skin_name' => (is => 'ro', required => 1);
has 'skin' => (
is => 'ro', lazy_build => 1,
handles => [ qw(create_layout_set search_path_for_type) ]
);
has 'layout_set_class' => (is => 'ro', lazy_build => 1);
has 'rendering_context_class' => (is => 'ro', lazy_build => 1);
implements '_build_layout_set_class' => as {
my ($self) = @_;
return $self->find_related_class('LayoutSet');
};
implements '_build_rendering_context_class' => as {
my ($self) = @_;
return $self->find_related_class('RenderingContext');
};
implements '_build_skin' => as {
my ($self) = @_;
Skin->new(
name => $self->skin_name, view => $self,
skin_base_path => # returns a File, not a Dir. Thanks, Catalyst.
Dir->new($self->app->path_to('share', 'skin', $self->skin_name)),
);
};
implements 'COMPONENT' => as {
my ($class, $app, $args) = @_;
return $class->new(%{$args||{}}, app => $app);
};
implements 'render_window' => as {
my ($self, $window) = @_;
my $root_vp = $window->focus_stack->vp_head;
my $rctx = $self->create_rendering_context;
my ($widget, $args) = $self->render_viewport_args($root_vp);
$widget->render(widget => $rctx, $args);
};
implements 'render_viewport_args' => as {
my ($self, $vp) = @_;
my $layout_set = $self->layout_set_for($vp);
my $widget = $self->widget_for($vp, $layout_set);
return ($widget, { viewport => $vp });
};
implements 'widget_for' => as {
my ($self, $vp, $layout_set) = @_;
return
$self->_widget_cache->{$layout_set->name}
||= $layout_set->widget_class
->new(
view => $self, layout_set => $layout_set
);
};
implements 'widget_class_for' => as {
my ($self, $layout_set) = @_;
my $base = $self->blessed;
my $widget_type = $layout_set->widget_type;
my $app_name = ref $self->app || $self->app;
return $self->_widget_class_cache->{$widget_type} ||= do {
my @search_path = ($base, $app_name, 'Reaction::UI');
my @haystack = map {join('::', $_, 'Widget', $widget_type)} @search_path;
foreach my $class (@haystack) {
#if the class is already loaded skip the call to Installed etc.
return $class if Class::MOP::is_class_loaded($class);
next unless Class::Inspector->installed($class);
my $ok = eval { Class::MOP::load_class($class) };
confess("Failed to load widget '${class}': $@") if $@;
return $class;
}
confess "Couldn't locate widget '${widget_type}' for layout "
."'${\$layout_set->name}': tried: ".join(", ", @haystack);
};
};
implements 'layout_set_for' => as {
my ($self, $vp) = @_;
#print STDERR "Getting layoutset for VP ".(ref($vp) || "SC:".$vp)."\n";
my $lset_name = eval { $vp->layout };
confess "Couldn't call layout method on \$vp arg ${vp}: $@" if $@;
unless (length($lset_name)) {
my $vp_class = ref($vp) || $vp;
my ($last) = ($vp_class =~ /.*(?:::ViewPort::)(.+?)$/);
my @fragments = split('::', $last);
$_ = join("_", split(/(?=[A-Z])/, $_)) for @fragments;
$lset_name = lc(join('/', @fragments));
#print STDERR "--- $vp_class is rendered as $lset_name\n";
}
my $cache = $self->_layout_set_cache;
return $cache->{$lset_name} ||= $self->create_layout_set($lset_name);
};
implements 'layout_set_file_extension' => as {
confess View." is abstract, you must subclass it";
};
implements 'find_related_class' => as {
my ($self, $rel) = @_;
my $own_class = ref($self) || $self;
confess View." is abstract, you must subclass it" if $own_class eq View;
foreach my $super ($own_class->meta->class_precedence_list) {
next if $super eq View;
if ($super =~ /::View::/) {
(my $class = $super) =~ s/::View::/::${rel}::/;
if (eval { Class::MOP::load_class($class) }) {
return $class;
}
}
}
confess "Unable to find related ${rel} class for ${own_class}";
};
implements 'create_rendering_context' => as {
my ($self, @args) = @_;
return $self->rendering_context_class->new(
$self->rendering_context_args_for(@args),
@args,
);
};
implements 'rendering_context_args_for' => as {
return ();
};
implements 'layout_set_args_for' => as {
return ();
};
};
1;
|
