improve if component to support block when test is true
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Key: TAPESTRY-2269
URL: https://issues.apache.org/jira/browse/TAPESTRY-2269
Project: Tapestry
Issue Type: Improvement
Reporter: Davor Hrg
Priority: Minor
Fix For: 5.0.12
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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