Aaron Leventhal wrote:
Would there be a way to deal with this in script. For example, if a script wanted to get the accessible object for a given DOM node, the presshell would need to be part of the call to nsIAccessibilityService::GetAccessibleFor(). The presentation affects how accessibility is exposed -- we care about things like bounds and whether things are partially or fully offscreen. Each accessible must know what presShell it's in so that it can return that information.

The DOM defines "views" which are basically presentations. This is what you would want to use here.
http://www.w3.org/TR/DOM-Level-2-Views/

Rob
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