Re: [Tclxml-users] Using createNode

[Steve B. <Ste...@zv...>]

Derek Fountain wrote:
> Can I use createNode to insert a node just where I want one?
> 
> I have a DOM representing this:
> 
> <test>
>   <author>
>     Derek Fountain
>   </author>
> </test>
> 
> and I want this:
> 
> <test>
>   <author>
>     Derek Fountain
>   </author>
>   <description>
>     Test information
>   </description>
> </test>
> 
> More generally, I want to insert a node as a child of a parent node based on 
> critera such as "make this the 2nd child element of parentNode".
> 
> Can I do that with createNode? If not, what's the best way?

The trick is making description come after the author element.

The simplistic approach is 'createNode /test/description',
but the new element may be before or after the author element.

Ideally you'd want to be able to do something like:
'createNode /test/*[2][self::description]'
But someone will have to add support to the createNode
method for it to work.

Otherwise, you can use the simple 'createNode /test/description'
call.  This returns the DOM node of the newly created element.
Then use the 'appendChild' method to make sure it's at the
end of the child list.  For example,

set node [dom::DOMImplementation createNode $doc /test/description]
dom::node appendChild [dom::node parent $node] $node

HTHs,
Steve Ball

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