117818 - Selection does not work for range in reverse document order

Status: RESOLVED INVALID

(Core :: DOM: Selection, defect)

Description

[Heikki Toivonen (remove -bugzilla when emailing directly)]

If you create a range object where the start point is after end point (i.e. in
reverse document order), adding the range to the selection object does not seem
to do anything.

I found this out while implementing FIXptr (see bug 74800).

Comment 1

[mjudge]

it is not legal to make a range with its start after its end.  this is in the 
DOM specs for range.

Comment 2

[Heikki Toivonen (remove -bugzilla when emailing directly)]

Hmm, section 2.4 in
http://www.w3.org/TR/2000/REC-DOM-Level-2-Traversal-Range-20001113/ranges.html
states that "The start position of a Range is guaranteed to never be after the
end position. To enforce this restriction, if the start is set to be at a
position after the end, the Range is collapsed to that position. Similarly, if
the end is set to be at a position before the start, the Range is collapsed to
that position.
"

Does our range impl support this or do we create a whacky range object (against
the spec)?