On Apr 5, 2007, at 12:43 AM, Pascal Fleury wrote:
> On Thursday 05 April 2007 06:05:54 William Cox wrote:
>> Tim,
>> stuff based on components to be called later. things like bringing in
>> js scripts and css files if certain components need them. heres an
>
> I used regular OO in Mason, i.e. for JavaScript, CSS and header
> meta info, I
> call something like SELF:javascript. In a component that calls other
> subcomponents, that javascript method calls the same method on the
> subcomponents. It makes a little replication of the call chain
> code, but it's
> manageable.
>
> This makes it essentially a "multi-pass" page builder, first pass
> for header
> metadata, then for javascript. For CSS, it is basically handled in
> the meta,
> so that I @import the appropriate files.
>
> The main component (my autohandler) implements empty defaults for
> all these
> methods, so that you need not add them in case there is no meta or
> javascript
> to add to the current page.
>
> That is an area where I was always struggling, and I think I have
> not found
> yet the proper idiom to do it in Mason. I was wondering also if I
> could use
> the buffers for this: call the components, and put the meta stuff
> into the
> meta buffer, the javascript into the javascript buffer, etc. Then,
> the top
> level component (an autohandler) would string these buffers
> together into the
> final page.
what i do is capture the request_comp ($m->fetch_next, actually)
output during the %init section of autohandler. that allows the page
components to influence global state (or set $m->notes) that can then
be used by the autohandler.
an abbreviated example:
<%init>
my $content = $m->scomp($m->fetch_next, %ARGS);
$m->notes(content => $content);
</%init>
<html><head>
<& SELF:head &>
<% $m->notes('head_outro') %>
</head><body>
<& SELF:header &>
<% $m->notes('content') %>
<& SELF:footer &>
</body></html>
now methods head, header, footer, et al, are run _after_ the
requested component, which has a chance to influence their behavior
(noting which js/css files are needed, etc). typically i do that via
other $m->notes, using helper methods defined in autohandler such as:
<%method append_head_outro>
<%args>
$content => $m->content()
</%args>
% $m->notes('head_outro' => ($m->notes('head_outro') || '') .
$content);
</%method>
so foo.html can look like
<div>here is some central page content</div>
%# this page requires prototype.js, so be sure it is included
<&| SELF:append_head_outro &>
<script src="<% $c->uri_for('/static/script/scriptaculous/
prototype.js') %>" type="text/javascript"></script>
</&>
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