[TAP5-496] Change If and Unless to render thier template element if provided (i.e., when using t:type) as well as informal parameters

• Type: Improvement
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 5.0.18
• Fix Version/s: 5.1.0.0
• Component/s: tapestry-core
• Assignee: Howard Lewis Ship
• Reporter: Folke Behrens
• Created: 04/Feb/09 13:27
• Updated: 10/Feb/09 19:43
• Resolved: 10/Feb/09 19:43

Description

I use a lot of dummy texts in my template to see what the page will actually look like when rendered. To filter out these fragments I created a "Dummy" component whose setupRender method always returns "false".

I don't know if this is efficient but it would be nice to have something like this already in T5's component library.

More efficient would be a special marker XML attribute that the template parser recognizes. Maybe something like a t:test attribute which is works like <t:if test="...">...</t:if>. If the contained expression evaluations to false or null the marked element is filtered.

<ul>
<li t:test="show.item">conditional item</li>
<li t:test="literal:false">dummy item</li>
</ul>