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|
package Reaction::UI::Controller;
use base qw(Catalyst::Controller); # Reaction::Object);
use Reaction::Class;
use Scalar::Util 'weaken';
use namespace::clean -except => [ qw(meta) ];
has context => (is => 'ro', isa => 'Object', weak_ref => 1);
with(
'Catalyst::Component::InstancePerContext',
'Reaction::UI::Controller::Role::RedirectTo'
);
sub build_per_context_instance {
my ($self, $c, @args) = @_;
my $class = ref($self) || $self;
my $newself = $class->new($self->_application, {%$self, context => $c, @args});
return $newself;
}
sub push_viewport {
my $self = shift;
my $c = $self->context;
my $focus_stack = $c->stash->{focus_stack};
my ($class, @proto_args) = @_;
my %args;
if (my $vp_attr = $c->stack->[-1]->attributes->{ViewPort}) {
if (ref($vp_attr) eq 'ARRAY') {
$vp_attr = $vp_attr->[0];
}
if (ref($vp_attr) eq 'HASH') {
$class = $vp_attr->{class} if defined $vp_attr->{class};
%args = %{ $self->merge_config_hashes($vp_attr, {@proto_args}) };
} else {
$class = $vp_attr;
%args = @proto_args;
}
} else {
%args = @proto_args;
}
$args{ctx} = $c;
if (exists $args{next_action} && !ref($args{next_action})) {
$args{next_action} = [ $self, 'redirect_to', $args{next_action} ];
}
$focus_stack->push_viewport($class, %args);
}
sub pop_viewport {
return shift->context->stash->{focus_stack}->pop_viewport;
}
sub pop_viewports_to {
my ($self, $vp) = @_;
return $self->context->stash->{focus_stack}->pop_viewports_to($vp);
}
sub make_context_closure {
my($self, $closure) = @_;
my $ctx = $self->context;
weaken($ctx);
return sub { $closure->($ctx, @_) };
}
1;
__END__;
=head1 NAME
Reaction::UI::Controller - Reaction Base Controller Class
=head1 SYNOPSIS
package MyApp::Controller::Foo;
use strict;
use warnings;
use parent 'Reaction::UI::Controller';
use aliased 'Reaction::UI::ViewPort';
sub foo: Chained('/base') Args(0) {
my ($self, $ctx) = @_;
$ctx->push_viewport(ViewPort,
layout => 'foo',
);
}
1;
=head1 DESCRIPTION
Base Reaction Controller class, subclass of L<Catalyst::Controller>.
=head1 ROLES CONSUMED
=over 4
=item L<Catalyst::Component::InstancePerContext>
=item L<Reaction::UI::Controller::Role::RedirectTo>
Please not that this functionality is now deprecated.
=back
=head1 METHODS
=head2 push_viewport $vp_class, %args
Creates a new instance of the L<Reaction::UI::ViewPort> class
($vp_class) using the rest of the arguments given (%args). Defaults of
the action can be overridden by using the C<ViewPort> key in the
controller configuration. For example to override the default number
of items in a CRUD list action:
__PACKAGE__->config(
action => {
list => { ViewPort => { per_page => 50 } },
}
);
The ViewPort is added to the L<Reaction::UI::Window>'s FocusStack in
the stash, and also returned to the calling code.
Related items:
=over
=item L<Reaction::UI::Controller::Root>
=item L<Reaction::UI::Window>
=back
TODO: explain how next_action as a scalar gets converted to the redirect arrayref thing
=head2 pop_viewport
=head2 pop_viewport_to $vp
Call L<Reaction::UI::FocusStack/pop_viewport> or
L<Reaction::UI::FocusStack/pop_viewport_to> on
the C<< $c->stash->{focus_stack} >>.
=head2 redirect_to $c, $to, $captures, $args, $attrs
Construct a URI and redirect to it.
$to can be:
=over
=item The name of an action in the current controller.
=item A L<Catalyst::Action> instance.
=item An arrayref of controller name and the name of an action in that
controller.
=back
$captures and $args default to the current requests $captures and
$args if not supplied.
=head2 make_context_closure
The purpose of this method is to prevent memory leaks.
It weakens the context object, often denoted $c, and passes it as the
first argument to the sub{} that is passed to the make_context_closure method.
In other words,
=over 4
make_context_closure returns sub { $sub_you_gave_it->($weak_c, @_)
=back
To further expound up this useful construct consider code written before
make_context_closure was created:
on_apply_callback =>
sub {
$self->after_search( $c, @_ );
}
),
This could be rewritten as:
on_apply_callback => $self->make_context_closure(
sub {
my $weak_c = shift;
$self->after_search( $weak_c, @_ );
}
),
Or even more succintly:
on_apply_callback => $self->make_context_closure(
sub {
$self->after_search( @_ );
}
),
=head1 AUTHORS
See L<Reaction::Class> for authors.
=head1 LICENSE
See L<Reaction::Class> for the license.
=cut
|
