GNU bug report logs - #73593
29.4; desktop-save-mode does not store window configurations

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From: martin rudalics <rudalics <at> gmx.at>
To: Eli Zaretskii <eliz <at> gnu.org>, Bob Hepple <bob.hepple <at> gmail.com>
Cc: 73593 <at> debbugs.gnu.org
Subject: bug#73593: 29.4; desktop-save-mode does not store window configurations
Date: Wed, 2 Oct 2024 09:41:31 +0200

> Martin, is there any practical way of preserving a
> window-configuration across Emacs sessions?

We added window states for that purpose.

> The object
> current-window-configuration returns is exposed to Lisp as an opaque
> object, and I don't think we can meaningfully serialize it, can we?

It would be very tedious to do that and the result would be something
like a window state anyway.

> So perhaps the solution is to filter such registers from
> register-alist when we save desktop?

This is the most reasonable way IMO.  The other two solutions would be to
optionally proceed as follows:

- Whenever we save a configuration in a register, make a shadow register
  where we save the state and use that when we save the desktop.

- When saving the desktop, temporarily restore the configuration stored
  in the register (if its frame is still live), save the state of that
  frame in a register and restore its configuration again.

For both, register.el would have to be able to handle window states.

martin

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