bug#33871: 27.0.50; Revert Dired window saved in window configuration

[martin rudalics via "Bug reports for GNU Emacs, the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>]

 > OTOH, tab-bar.el is preloaded as well, so no problem to leave this
 > in tab-bar.el, since window.el is too large already.

Then I would give them a 'tab-bar-' prefix.

 >> Maybe 'window-restore-set-context' and 'window-restore-use-context'
 >> would be more indicative names.
 >
 > The name 'window-restore-set-context' looks quite self-contradictory.
 > If your intention was to use a unique prefix, then maybe we could use the
 > prefix 'window-context' like in 'window-context-set', 'window-context-use'.

I'd say the context of a window are the other windows of the same frame.

 >> Note that when a buffer is killed, the values of its local variables may
 >> be lost.  I don't know whether this is an issue here.  Alternatively, we
 >> could have 'set_window_buffer' set the 'context' window parameter from
 >> the buffer-local value which would, however, mean that whenever one
 >> changes the buffer-local value, one would have to simultaneously update
 >> the parameters in all windows showing that buffer.  Something that could
 >> be done with the help of an advice, though...
 >
 > This doesn't look like an issue here because the context is stored
 > in a window parameter.

IIUC the context is stored but not the function to restore the position
from the context.

 > And when the buffer is killed, there is no need
 > to restore a context in the killed buffer.

If you don't intend to restore the context from the file the buffer was
visiting.  Are you sure you don't want to do that?

 > The format of the window parameter
 >
 >    '(BUFFER-NAME . ((dired-filename . FILENAME)))
 >
 > uses BUFFER-NAME to check whether the buffer was killed,
 > and when the current window's buffer doesn't match BUFFER-NAME,
 > then do nothing.

What do you do when you want to restore a configuration from a tab, that
configuration contains a window whose buffer was killed but whose file
still exists and you wanted to revisit that file in the window with its
previous point?  Ignore any context for that window?

martin