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package HTML::FormHandler::Blocks;
# ABSTRACT: arrange form layout using blocks
use Moose::Role;
use Try::Tiny;
use Class::Load qw/ load_optional_class /;
use namespace::autoclean;
use Data::Clone;
use HTML::FormHandler::Widget::Block;
has 'blocks' => (
isa => 'HashRef[Object]',
is => 'ro',
lazy => 1,
traits => ['Hash'],
builder => 'build_blocks',
handles => {
has_blocks => 'count',
add_block => 'set',
block => 'get',
block_exists => 'exists',
},
);
sub build_blocks { {} }
has 'block_list' => ( is => 'rw', isa => 'ArrayRef', lazy => 1, builder => 'build_block_list' );
sub build_block_list {[]}
has 'render_list' => (
is => 'rw',
isa => 'ArrayRef[Str]',
traits => ['Array'],
lazy => 1,
builder => 'build_render_list',
handles => {
has_render_list => 'count',
add_to_render_list => 'push',
all_render_list => 'elements',
get_render_list => 'get',
}
);
sub get_renderer {
my ( $self, $name ) = @_;
die "must provide a name to get_renderer" unless $name;
my $obj = $self->block($name);
return $obj if ref $obj;
$obj = $self->field_from_index($name);
return $obj if ref $obj;
die "did not find a field or block with name $name\n";
}
after '_build_fields' => sub {
my $self = shift;
my $meta_blist = $self->_build_meta_block_list;
if( @$meta_blist ) {
foreach my $block_attr (@$meta_blist) {
$self->make_block($block_attr);
}
}
my $blist = $self->block_list;
if( @$blist ) {
foreach my $block_attr (@$blist) {
$self->make_block($block_attr);
}
}
};
sub make_block {
my ( $self, $block_attr ) = @_;
my $type = $block_attr->{type} ||= '';
my $name = $block_attr->{name};
die "You must supply a name for a block" unless $name;
my $do_update;
if ( $name =~ /^\+(.*)/ ) {
$block_attr->{name} = $name = $1;
$do_update = 1;
}
my $class;
if( $type ) {
$class = $self->get_widget_role($type, 'Block');
}
else {
$class = 'HTML::FormHandler::Widget::Block';
}
$block_attr->{form} = $self->form if $self->form;
my $block = $self->form->block( $block_attr->{name} );
if ( defined $block && $do_update ) {
delete $block_attr->{name};
foreach my $key ( keys %{$block_attr} ) {
$block->$key( $block_attr->{$key} )
if $block->can($key);
}
}
else # new block
{
$block = $class->new(%$block_attr);
$self->add_block( $name, $block );
}
}
# loops through all inherited classes and composed roles
# to find blocks specified with 'has_block'
sub _build_meta_block_list {
my $self = shift;
my @block_list;
foreach my $sc ( reverse $self->meta->linearized_isa ) {
my $meta = $sc->meta;
if ( $meta->can('calculate_all_roles') ) {
foreach my $role ( reverse $meta->calculate_all_roles ) {
if ( $role->can('block_list') && $role->has_block_list ) {
foreach my $block_def ( @{ $role->block_list } ) {
push @block_list, $block_def;
}
}
}
}
if ( $meta->can('block_list') && $meta->has_block_list ) {
foreach my $block_def ( @{ $meta->block_list } ) {
push @block_list, $block_def;
}
}
}
return clone( \@block_list );
}
1;
__END__
=pod
=encoding UTF-8
=head1 NAME
HTML::FormHandler::Blocks - arrange form layout using blocks
=head1 VERSION
version 0.40057
=head1 SYNOPSIS
This is a role which provides the ability to render your form in
arbitrary 'blocks', instead of by fields. This role is included
by default in HTML::FormHandler.
package MyApp::Form;
use HTML::FormHandler::Moose;
extends 'HTML::FormHandler';
sub build_render_list {[ 'foo', 'fset' ]}
has_field 'foo';
has_field 'bar';
has_field 'nox';
has_block 'fset' => ( tag => 'fieldset', render_list => ['bar', 'nox'] );;
....
$form->render;
Blocks live in the HTML::FormHandler::Widget::Block:: namespace. The default,
non-typed block is L<HTML::FormHandler::Widget::Block>. Provide a type for
custom blocks:
has_block 'my_block' => ( type => 'CustomBlock', render_list => [...] );
You can also build blocks with a 'block_list' attribute, or the builder for it,
'build_block_list'.
Rendering with blocks is supported by the rendering widgets. Render::Simple doesn't
do it, though it would be possible to make your own custom renderer.
=head1 AUTHOR
FormHandler Contributors - see HTML::FormHandler
=head1 COPYRIGHT AND LICENSE
This software is copyright (c) 2014 by Gerda Shank.
This is free software; you can redistribute it and/or modify it under
the same terms as the Perl 5 programming language system itself.
=cut
|
