Re: [xsl] partial load of xml documents

[Emmanouil Batsis <Emmanouil.Batsis@xxxxxxxxxxx>]

Supposing you have an id for each node, when it is clicked all you have 
to do is check whether its child nodes have been loaded and if not, load 
them (one level at a time). You can easily pass the node ID to your 
server app (with an XMLHttpRequest object or using an XML documents 
.load method) which should return the first level children of the node.

Now, if your structure is something like 

<div>
   <ul>
<li id="n1" onclick="loadChildren(this)">bla</li>
</div>

then, with Sarissa[1], that would be as easy as

function loadChildren(oElem){
  if(oElem.getElementsByTagName("*").length = 0){
      Sarissa.updateContentFromURI("/childNodes/load.do?id="+oElem.id, 
oElem, transformer);
  };
};

Where transformer is an XSLTProcessor object. You can easily tell your 
server app to transform for you if a client side XSLT does not apply.

[1] http://sarissa.sourceforge.net

hth,

Manos


crvelin@xxxxxx wrote:

> I'm working on examples of expandable/collapsible tree's. At some examples
> the amount of nested branches is very huge. The results are large xml
> documents which are taking a while for transformation (since i'm doing it
> clientsided). 
>
> Further, for expanding one single branch, the whole xml document must be
> reloaded --> "xmlDoc.documentElement.transformNode(xslDoc)". To get an
> alternative approach (if there is one), i am wondering if there is a
> possibility to load only specific parts of an xml document or to point the
> xsl transformation to a certain branch for re-rendering it.
>
> I've already done some first steps in this direction. Initially i'm loading 
> only the top nodelevel, which enormously reduces the loading time. 
> By expanding one node,i'm loading the correpsonding branch. I'm realising 
> this by changing some attributes which defines expanded and collapsed
> states.
> Then i have defined severals templates which are covering those given
> states.
> But this approach leads me to the same point. Means, with each node which
> will 
> be expanded, the loading time increases again. At this point i should be
> able to
> verify if one branch's already loaded or not. Is this possible?
>
>
> I would appreciate any tiny hint and thank in advance for help.
>
> -Used processor(Vendor: Microsoft, Vendor URL: http://www.microsoft.com)
>
>
> Best regards, Crvelin