[news.eclipse.webtools] Re: Questions about building on top of the XML E

[Nitin Dahyabhai <nitind@xxxxxxxxxx>]

Konstantin Komissarchik wrote:
> Nope. The XML editor infrastructure does not implement 
> org.w3c.dom.events.* interfaces. I did find an example plugin from an 
> old EclipseCon talk and from there was able to figure out that the 
> relevant listener interfaces are apparently INodeNotifier and 
> INodeAdapter. Getting them configured properly for notification was a 
> pain, but at least I am now getting events.

Correct, the DOM Nodes all implement INodeNotifier and tell their 
registered INodeAdapters of changes to attributes and children.  The 
adapters are created by INodeAdapterFactory instances.

So it's actually not that painful for adding *UI* 
functionality--once you have the model, you can add your own adapter 
factory through its FactoryRegistry object.  This is usually done 
when the model is first set as the input on a viewer.  Your factory 
will then be asked to lazily create an adapter when someone, meaning 
your UI code, attempts to get that adapter from the Node using 
INodeNotifier.getAdapterFor(Object).  Under extreme circumstances, 
you may also get the factory for the PropagatingAdapterFactory.class 
type and add your factory to its list.  This will exchange some 
performance when Nodes are created for your factory being called 
right then.

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Nitin Dahyabhai
Eclipse WTP Source Editing
IBM Rational