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bug#6830: widget-complete bad completions in :type 'file

From: Stefan Monnier
Subject: bug#6830: widget-complete bad completions in :type 'file
Date: Tue, 06 Mar 2012 15:45:02 -0500
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/24.0.94 (gnu/linux)

>> > Then it looks like my analysis was partially incorrect: I assumed that
>> > the problem was with the value of `before_field', but it actually is
>> > with the value of `field'.  (Same reason, though: sorting two items
>> > whose keys compare equal.)
>> Ideally, the cursor position should not be considered as "in the
>> boundary", so the boundary overlay should not be considered for
>> determining `field'.
>> For that, I'd guess that you'd want the boundary's marker to use the
>> insertion type t.  But AFAIK, the code already sets its type to t.
>> So I'm not sure what's going on, here.

> I don't think I follow.  Can you elaborate on the role of the boundary
> marker in this issue?

I'm not sure what's the role of the boundary marker.  But from what you
say, the problem is that the boundary overlay's field property
interferes.  But the cursor should not be considered as being "in the
boundary field".  And indeed, the boundary's start marker is of
insertion-type t, which means that Fget_pos_property should ignore this
overlay when we're right in front of it.

The values that Chong sees for before_field, after_field, and field
are correct.  If in your case, `field' has a value different from
`completion' (e.g. it has value `boundary' or nil), then this is the
problem whose origin we need to find.


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