Mason2 how to wrap (augment) content of internal component
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Mason2 how to wrap (augment) content of internal component
by Roman Daniel
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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 ------------------------------------------------------------------------------ Ridiculously easy VDI. With Citrix VDI-in-a-Box, you don't need a complex infrastructure or vast IT resources to deliver seamless, secure access to virtual desktops. With this all-in-one solution, easily deploy virtual desktops for less than the cost of PCs and save 60% on VDI infrastructure costs. Try it free! http://p.sf.net/sfu/Citrix-VDIinabox _______________________________________________ Mason-users mailing list Mason-users@... https://lists.sourceforge.net/lists/listinfo/mason-users |
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Re: Mason2 how to wrap (augment) content of internal component
by Jonathan Swartz
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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? ------------------------------------------------------------------------------ Ridiculously easy VDI. With Citrix VDI-in-a-Box, you don't need a complex infrastructure or vast IT resources to deliver seamless, secure access to virtual desktops. With this all-in-one solution, easily deploy virtual desktops for less than the cost of PCs and save 60% on VDI infrastructure costs. Try it free! http://p.sf.net/sfu/Citrix-VDIinabox _______________________________________________ Mason-users mailing list Mason-users@... https://lists.sourceforge.net/lists/listinfo/mason-users |
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Re: Mason2 how to wrap (augment) content of internal component
by Jonathan Swartz
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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:
------------------------------------------------------------------------------ Ridiculously easy VDI. With Citrix VDI-in-a-Box, you don't need a complex infrastructure or vast IT resources to deliver seamless, secure access to virtual desktops. With this all-in-one solution, easily deploy virtual desktops for less than the cost of PCs and save 60% on VDI infrastructure costs. Try it free! http://p.sf.net/sfu/Citrix-VDIinabox _______________________________________________ Mason-users mailing list Mason-users@... https://lists.sourceforge.net/lists/listinfo/mason-users |
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Re: Mason2 how to wrap (augment) content of internal component
by Roman Daniel
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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 <swartz@...>
------------------------------------------------------------------------------ Ridiculously easy VDI. With Citrix VDI-in-a-Box, you don't need a complex infrastructure or vast IT resources to deliver seamless, secure access to virtual desktops. With this all-in-one solution, easily deploy virtual desktops for less than the cost of PCs and save 60% on VDI infrastructure costs. Try it free! http://p.sf.net/sfu/Citrix-VDIinabox _______________________________________________ Mason-users mailing list Mason-users@... https://lists.sourceforge.net/lists/listinfo/mason-users |
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