Commit | Line | Data |
7adfd53f |
1 | package Reaction::UI::RenderingContext::TT; |
2 | |
3 | use Reaction::Class; |
4 | use aliased 'Reaction::UI::RenderingContext'; |
5 | use aliased 'Template::View'; |
6 | |
7 | class TT is RenderingContext, which { |
8 | |
9 | has 'tt_view' => ( is => 'ro', required => 1, isa => View); |
10 | |
11 | has 'iter_class' => ( |
12 | is => 'ro', required => 1, |
13 | default => sub { 'Reaction::UI::Renderer::TT::Iter'; }, |
14 | ); |
15 | |
16 | implements 'render' => as { |
17 | my ($self, $fname, $args) = @_; |
18 | |
19 | # foreach non-_ prefixed key in the args |
20 | # build a subref for this key that passes self so the generator has a |
21 | # rendering context when [% key %] is evaluated by TT as $val->() |
22 | # (assuming it's a subref - if not just pass through) |
23 | |
24 | my $tt_args = { |
25 | map { |
26 | my $arg = $args->{$_}; |
27 | ($_ => (ref $arg eq 'CODE' ? sub { $arg->($self) } : $arg)) |
28 | } grep { !/^_/ } keys %$args |
29 | }; |
30 | |
31 | # if there's an _ key that's our current topic (decalarative syntax |
32 | # sees $_ as $_{_}) so build an iterator around it. |
33 | |
34 | # There's possibly a case for making everything an iterator but I think |
35 | # any fragment should only have a single multiple arg |
36 | |
37 | # we also create a 'pos' shortcut to content.pos for brevity |
38 | |
39 | if (my $topic = $args->{_}) { |
40 | my $iter = $self->iter_class->new( |
41 | $topic, $self |
42 | ); |
43 | $tt_args->{content} = $iter; |
44 | $tt_args->{pos} = sub { $iter->pos }; |
45 | } |
46 | $self->tt_view->include($fname, $tt_args); |
47 | }; |
48 | |
49 | }; |
50 | |
51 | package Reaction::UI::Renderer::TT::Iter; |
52 | |
53 | use overload ( |
54 | q{""} => 'stringify', |
55 | fallback => 1 |
56 | ); |
57 | |
58 | sub pos { shift->{pos} } |
59 | |
60 | sub new { |
61 | my ($class, $cr, $rctx) = @_; |
62 | bless({ rctx => $rctx, cr => $cr, pos => 0 }, $class); |
63 | } |
64 | |
65 | sub next { |
66 | my $self = shift; |
67 | $self->{pos}++; |
68 | my $next = $self->{cr}->(); |
69 | return unless $next; |
70 | return sub { $next->($self->{rctx}) }; |
71 | } |
72 | |
73 | sub all { |
74 | my $self = shift; |
75 | my @all; |
76 | while (my $e = $self->next) { |
77 | push(@all, $e); |
78 | } |
79 | \@all; |
80 | } |
81 | |
82 | sub stringify { |
83 | my $self = shift; |
84 | my $res = ''; |
85 | foreach my $e (@{$self->all}) { |
86 | $res .= $e->(); |
87 | } |
88 | $res; |
89 | } |
90 | |
91 | 1; |