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|
package Reaction::UI::View;
use Reaction::Class;
# declaring dependencies
use Reaction::UI::LayoutSet;
use Reaction::UI::RenderingContext;
class View which {
has '_layout_set_cache' => (is => 'ro', default => sub { {} });
has '_widget_class_cache' => (is => 'ro', default => sub { {} });
has '_widget_cache' => (is => 'ro', default => sub { {} });
has 'app' => (is => 'ro', required => 1);
has 'skin_name' => (is => 'ro', required => 1);
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 $self->find_related_class('RenderingContext');
};
implements 'COMPONENT' => as {
my ($class, $app, $args) = @_;
return $class->new(%{$args||{}}, app => $app);
};
sub BUILD{
my $self = shift;
my $skin_name = $self->skin_name;
#XXX i guess we will add the path to installed reaction templates here
my $skin_path = $self->app->path_to('share','skin',$skin_name);
confess("'${skin_path}' is not a valid path for skin '${skin_name}'")
unless -d $skin_path;
}
implements 'render_window' => as {
my ($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 $tail = $layout_set->widget_type;
my $lset_name = $layout_set->name;
# eventually more stuff will go here i guess?
my $app_name = ref $self->app || $self->app;
my $cache = $self->_widget_class_cache;
return $cache->{ $lset_name } if exists $cache->{ $lset_name };
my @search_path = ($base, $app_name, 'Reaction::UI');
my @haystack = map { join '::', $_, 'Widget', $tail } @search_path;
for my $class (@haystack){
#here we should throw if exits and error instead of eating the error
#only next when !exists
eval { Class::MOP::load_class($class) };
#$@ ? next : return $class;
#warn "Loaded ${class}" unless $@;
$@ ? next : return $cache->{ $lset_name } = $class;
}
confess "Couldn't load widget '$tail' for layout '$lset_name': tried: " .
join(", ", @haystack);
};
implements 'layout_set_for' => as {
my ($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 'create_layout_set' => as {
my ($self, $name) = @_;
return $self->layout_set_class->new(
$self->layout_set_args_for($name),
);
};
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 ${own_class}";
};
implements 'layout_set_args_for' => as {
my ($self, $name) = @_;
return (
name => $name,
search_path => $self->layout_search_path,
view => $self,
);
};
implements 'layout_search_path' => as {
my ($self) = @_;
return $self->search_path_for_type('layout');
};
implements 'search_path_for_type' => as {
my ($self, $type) = @_;
return [ $self->app->path_to('share','skin',$self->skin_name,$type) ];
};
implements 'create_rendering_context' => as {
my ($self, @args) = @_;
return $self->rendering_context_class->new(
$self->rendering_context_args_for(@args),
@args,
);
};
implements 'rendering_context_args_for' => as {
return ();
};
};
1;
|
