[jira] Commented: (VELOCITY-558) Allow macros that act as blockDirectives

["Jarkko Viinamäki (JIRA)" <de...@velocity.apache.org>]

    [ https://issues.apache.org/jira/browse/VELOCITY-558?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12622998#action_12622998 ] 

Jarkko Viinamäki commented on VELOCITY-558:
-------------------------------------------

This looks a lot like VELOCITY-583

> Allow macros that act as blockDirectives
> ----------------------------------------
>
>                 Key: VELOCITY-558
>                 URL: https://issues.apache.org/jira/browse/VELOCITY-558
>             Project: Velocity
>          Issue Type: Improvement
>          Components: Engine
>    Affects Versions: 1.5
>         Environment: Windows
>            Reporter: Guido Deinhammer
>            Priority: Minor
>
> Currently migrating a web project from Oracle's proprietary UIX to Velocity, I found the limitation that macros are always line directives and cannot ave content somewhat limiting.
> I would suggest the following improvement or addition to the macro functionality.
> You should be able to define a blockMacro - maybe with a syntax like this:
> #blockmacro(section $title $open)
> <table><th><td>$title</td></th>
> #if($open)
>   #body
> #end
> </table>
> #end
> Where #body would render the body of the macro call. The macro call could look like this:
> #section("My Collapsible Section", true)
> <tr><td>sectionContent</td></tr>
> #end
> This allows the macro to render the content only under a certain condition, or it would allow the macro to render the content multiple times. I think this would a lot of flexibilty to macros - it might be an enhancement worth considering for the Summer of Code Google project.

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