[Radiant] Container tag with default values for nested tags

[Casper Fabricius]

Sean,

Thanks for your answer. However, parse doesn't work quite as I hoped.  
Calling parse will parse the given string immediately in the current  
context and return a string. I need to postpone the actual parsing  
until the context is changed to each item in the collection. I was  
hoping to be able to construct some kind of proxy-object that would  
respond to #call just like when nested templates has been given.

I can easily solve this by just inserting the default value unparsed,  
and then have a helper method that checks if the value is a string to  
parsed or a method to be invoked, but I find that solution quite ugly.  
I'm obsessing about it, because I'd like to contribute the tag to the  
Radiant core, so I want it to coded right.

Thanks,
Casper


On 01/06/2008, at 16:51, Sean Cribbs wrote:

> Casper,
>
> Call parse, passing the text you want to parse:
>
> hash[:normal] ||= parse('<li><r:link /></li>')
>
> Sean
>
> Casper Fabricius wrote:
>> I'm developing a tag inspired by the way <r:navigation /> works; by  
>> using nested tags to let the user specify how he wants to render a  
>> given collection.
>>
>> The user could write:
>> <r:collection_tag>
>>    <r:normal><b><r:link></b></r:normal>
>> </r:collection_tag>
>>
>> - and the tag uses this nested tag by doing:
>>    hash = tag.locals.collection_tag = {}
>>    tag.expand
>>
>> - and then later:
>>    hash[:normal].call
>>
>> - to render the contents of the nested tag.
>>
>> However, I want the user to also be able to write just:
>> <r:collection_tag />
>>
>> - and the tag will populate hash[:normal] with a default value of,  
>> say, <r:link />.
>>
>> However, I don't know how to create a default value for a nested  
>> tag, least not when it contains other Radius tags that need to be  
>> parsed in the context of each iteration of the collection.
>>
>> I have tried assigning default values with code such as:
>>    hash[:normal]   ||= '<li><r:link /></li>'
>>
>> - or:
>>    hash[:normal]   ||= Proc.new {'<li><r:link /></li>'}
>>
>> - but the first is just a string, and does not respond to the #call  
>> method, and the second is just a proc, and do not in fact render  
>> <r:link /> in the context, it just returns the string unparsed.
>>
>> I know of several examples on using default values for tag  
>> attributes, but not for nested tags. Any hints, ideas, examples?
>>
>> Cheers,
>> Casper Fabricius
>> http://casperfabricius.com
>>
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