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https://issues.apache.org/jira/browse/TAPESTRY-2269?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Howard M. Lewis Ship updated TAPESTRY-2269:
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Affects Version/s: 5.0
> improve if component to support block when test is true
> -------------------------------------------------------
>
> Key: TAPESTRY-2269
> URL: https://issues.apache.org/jira/browse/TAPESTRY-2269
> Project: Tapestry
> Issue Type: Improvement
> Affects Versions: 5.0
> Reporter: Davor Hrg
> Priority: Minor
> Fix For: 5.0
>
>
> This addition can make if component more versatile:
> I came up with this while trying to make the template code more readable.
> The first version was some ifs and loops which I decided to break up into
> blocks,
> so that logic inside the loop is more readable.
> so one snippet stuck to me as it can be done better...
> the first version was:
> <t:if test="currentContainer"><t:delegate to="containerEditor"/></t:if>
> <t:unless test="currentContainer"><t:delegate
> to="block:containerDisplay"/></t:unless>
> version 2.
> <t:if test="currentContainer" else="block:containerDisplay"><t:delegate
> to="containerEditor"/></t:if>
> this is scrambled and akward so I've made a copy of if component and got this:
> <t:if test="currentContainer" render="containerEditor"
> else="block:containerDisplay"/>
> with "render" block parameter the if component in this case becomes simpler
> to read
> and can also act as conditional delegate when "else" block parameter is
> ommited:
> <t:if test="currentContainer" render="containerEditor"
> else="block:containerDisplay"/>
> this also simply doable by pushing more logic to java code:
> <t:delegate to="containerRender"/>
> public Object getContainerRender(){
> if(isCurrentContainer){
> return _containerEditor;
> }else{
> return _resources.getBlock("containerDisplay");
> }
> }
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