Re: Shared variables vs. auto-imported templates (freemarker-tags plugin)

Wednesday, July 13, 2011, 4:53:02 AM, Daniel Henrique Alves Lima wrote:

> I've updated some links.
> ====
>
>     Hi, everybody.
>
>     Daniel, I'm pretty sure we've talked about this before, but I can't
> remember where (I read 
> http://freemarker.624813.n4.nabble.com/Configuration-setup-td3315086.html
> and 
> http://freemarker.624813.n4.nabble.com/Grails-integration-td3161875.html).
>     Can you help me?
>
>     I'm rewriting freemarker-tags and exposing the directives and 
> functions as values in shared maps 
> (https://github.com/daniel-lima/grails-freemarker-tags-plugin/blob/master/src/java/org/grails/plugins/freemarker/AbstractTagLibAwareConfigurer.java#L154).
>
>     Suppose that my tests will be the base of our discussion:
> https://github.com/daniel-lima/grails-freemarker-tags-plugin/blob/master/test/integration/org/grails/plugins/freemarker/TagLibAwareConfigurerTests.groovy#L46
>
> http://pastie.org/2203040
>
>
>         Now, my doubt: If my data model ('binding' in my test case - 
> https://github.com/daniel-lima/grails-freemarker-tags-plugin/blob/master/test/integration/org/grails/plugins/freemarker/TagLibAwareConfigurerTests.groovy#L81)
> contains a variable named as 'g', it will shadowing '[@g.form /]', right?

Yes, data-model shadows shared variables.

>         /* template, data model */
>         parseFtlTemplate('[#ftl/][@g.form /]', [g: 'random text'])
>
>         Will the shadowing also happen if I do the auto-importing of 
> libraries containing macro or function declarations (instead of using 
> shared variables)?

No, since the variables assigned during the processing of the
templates shadow the data-model and the shared variables.

See also: http://freemarker.org/docs/pgui_misc_var.html

> Something like:
>
>         [!-- g.ftl --]
>         [#assign form = "TagLibToDirectiveAndFunction"?new('g', 'form')]
>
>         // AbstractTagLibAwareConfigurer.java
>         configuration.addAutoImport('g', 'g.ftl')
>
>         /* template, data model */
>         parseFtlTemplate('[#ftl/][@g.form /]', [g: 'random text'])
>
>
>     Is my question clear? I can try to rewrite it, if you prefer.
>
>     Thanks in advance.
>
>     Best regards,
>
>         Daniel.

-- 
Best regards,
 Daniel Dekany


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