Re: [xml] xmlValidateOneElement - will fill-in defaults yes?

[Daniel Veillard <veillard redhat com>]

On Mon, Apr 23, 2007 at 03:24:38PM -0700, Rick Jones wrote:
> Another chapter in my sputtering netperf4 development :)
>
> I want to enable the users of netperf4 to build-up a configuration from 
> an interactive netperf4 session without having to go-out and run an 
> external XML editor to create config files.  To that end, I want to be 
> adding elements to a config doc for which I have a DTD.  I don't want 
> the netperf4 main code to be _particularly_ aware of all the attributes 
> etc for elements so it can still manipulate added test types.
>
> So, if I add a node (eg "test" in netperf DTD entity names FWIW) and if 
> I call xmlValidateOneElement() against that node, will all the defaults 
> from the DTD get filled-in automagically?

  Hum, no. Validation will not change the document, if it was doing that
I would get killed immediatly by angry users...
  I don't think we have at the tree level a way to automatically add
defaulted attributes, this is something usually done at parsing time.
  You may be interested in
    http://xmlsoft.org/html/libxml-valid.html#xmlValidGetPotentialChildren
  and 
    http://xmlsoft.org/html/libxml-valid.html#xmlValidGetValidElements

 to get the list of defaulted attributes and their value
    http://xmlsoft.org/html/libxml-valid.html#xmlGetDtdQElementDesc
and then walk the xmlAttributePtr attributes list and check defaultValue.

> ultimately, I'll want to do something similar involving a GTK gui but 
> one step at a time...

  you could look at MlView for inspiration ...
   http://www.freespiders.org/projects/gmlview/
but honnestly a generic editor is a daunting task, believe me !

Daniel

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