1146318 - Consider making it impossible to use elements as Web IDL parent objects

Status: NEW

(Core :: DOM: Core & HTML, defect, P2)

Description

[Boris Zbarsky [:bzbarsky]]

Then we could avoid having XBL constructors and whatnot run during wrapping and hence remove the hackery in Wrap() where getting the parent object might wrap the object we're trying to wrap.

We'll need to do some serious restricting of what types are allowed to be return values of GetParentObject to do this, I expect

Comment 1

[Boris Zbarsky [:bzbarsky]]

In particular, we'd need to disallow nsISupports returns from GetParentObject, which involves changing a 
_lot_ of consumers.  Arguably those consumers should be doing something not quite as slow...

Comment 2

[Boris Zbarsky [:bzbarsky]]

That said, things parented to elements that are anonymous go into the XBL scope, so it might not be possible to really do what this bug is asking for, until we kill XBL.

Comment 3

[Boris Zbarsky [:bzbarsky]]

Attachment: A very very partial patch for some cases that use nsISupports GetParentObject