Thank you very much for a concise reply.
I'll start with 1) (it may be ugly but it is self documented), if I later
found, there are two many cases of wrapping internal comps, I can switch to
2)
Regarding option 4) I haven't found so far a way how to (reasonably) apply
roles to a template.
I can use 'with' in %class section but only for roles which don't interact
with the importing class
(modifiers, requires, ...) since the role is applied before the methods of
the class are compiled.
I tried Scope::Guard unsuccessfully to process 'with' after methods are
compiled
<%class>
use Scope::Guard qw(scope_guard);
# I need the role to be applied after methods are introduced in runtime
my $g = scope_guard sub { with 'MyApp::Mason::Component::Form::Wrapper' };
<%class>
which is obvious since on a file level the $g never goes out of scope.
What I even can't imagine is: "Then your Base.mc could use a role that has
an around modifier on main()"
How a modifier applied to a base class can wrap a method supplied in a
subclass?
Roman Daniel
2012/1/7 Jonathan Swartz <swa...@pobox.com>
> Well, it's harder than I thought without implementation changes or a
> plugin.
>
> Here are the options I'm considering so far:
>
> 1) Change the way you call these components - i.e. instead of
>
> <& /form/login.mc, form=>$login_form &>
>
> do
>
> <% $m->construct('/form/login.mc', form => $login_form)->render %>
>
> Obviously this is ugly, would be better to be able to change it
> transparently without changing each component call.
>
> 2) Change Mason::Request::comp (<& &>) so that instead of calling main()
> directly, it calls a method call() which in turn calls main(). Then you can
> override call() or use an around-modifier on it. e.g.
>
> form/Base.mc:
> ---------------------
> <%around call>
> <form .....>
> % $self-$orig(@_);
> </form>
> </%around>
>
> This introduces an extra method for every component call that will almost
> never be overriden. Maybe not a big deal in the grand scheme of things, but
> feels hacky. Also introduces another reserved method name in
> Mason::Component. Finally if you have multiple layers of these they will
> wrap in the reverse direction you expect.
>
> 3) Add a plugin that does #2, so that the extra method call doesn't hit
> everyone, just those that need it.
>
> 4) Create a way to apply roles to components. Then your Base.mc could use
> a role that has an around modifier on main().
>
> Thoughts welcome.
>
> Jon
>
> On Jan 6, 2012, at 3:21 PM, Jonathan Swartz wrote:
>
> Definitely possible, but I am working on the best syntax... :)
>
> Jon
>
> On Jan 6, 2012, at 1:55 AM, Roman Daniel wrote:
>
> Is it possible to achieve the effect of wrapping child component content
> by its parent with internal components?
> For request component I could use
>
>
> form/Base.mc:
> --------------------
> <%class>
> has form => (is =>'ro', required =>1);
> </%class>
>
> <%method wrap>
> <form .....>
> % inner();
> </form>
> </%method>
>
>
> form/login.mc:
> ---------------------
> <% $.field(...) %>
> <% $.field(...) %>
>
>
> But when called from other component, method main is called directly and
> wrap is skipped.
>
> <& /form/login.mc, form=>$login_form &>
>
>
> I appreciate any tip
>
> Roman Daniel
>
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