Nikko Wolf wrote:
Ian Bicking wrote:
I'm surprised this has never come up for me before, but now I want to
render a recursive data structure and I'm at a loss how I might do
that in ZPT. Or, what the best workaround would be. E.g.:
['a', 'b', ['c', ['d', 'e']]]
Becomes:
<ul>
<li>a</li>
<li>b</li>
<ul>
<li>c</li>
<ul>
<li>d</li>
<li>e</li>
</ul>
</ul>
</ul>
I've made recursive macros before. It's not so different from other
recursion techniques. Here's one to render a site tree::
<html>
<head>
<title tal:content="template/title">The title</title>
</head>
<body>
Site structure:
<tal:contain define="location nocall:here">
<div metal:use-macro="template/macros/list" />
</tal:contain>
</body>
</html>
<tal:hidemacro replace="nothing">
<metal:recurse define-macro="list">
<ul>
<li tal:repeat="elt location/objectValues">
<span tal:content="elt/getId">objectId</span>
<metal:block tal:condition="elt/isPrincipiaFolderish"
tal:define="location nocall:elt">
<div metal:use-macro="template/macros/list" />
</metal:recurse>
</li>
</ul>
</metal:recurse>
</tal:hidemacro>
It will go from 'context', of course, unless you were to change the
definition of 'location' in the page.
You can imagine how this would work with a nested list: you just have to
have ways of checking containership and getting contents.
--jcc
--
"Building Websites with Plone"
http://plonebook.packtpub.com/
Enfold Systems, LLC
http://www.enfoldsystems.com
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