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bug#32850: 27.0.50; window-swap-states doesn't swap window prev/next-buf

From: martin rudalics
Subject: bug#32850: 27.0.50; window-swap-states doesn't swap window prev/next-buffers
Date: Mon, 29 Oct 2018 09:44:31 +0100

>> What you probably want is a facility to clone a window.  I have no
>> idea how to do that and which semantics to attach to a cloned window.
> I guess a cloned window implies the same state with a different
> identity.

A different window object, hence.

> Now I see the root of this problem: it's because 'delete-other-windows'
> keeps one window and reuses it for the restored state.

There's no reasonable way to avoid that - each frame needs a live root

> So a proper fix for 'window-state-put' should use a cloned window
> like you proposed.

Couldn't we work around this problem some other way?  Pumping up the
window's sequence number, for example?  Adding a function that
replaces the live root window of a frame with a different object is
somewhat ludicrous.


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