Re: [21.1.90]: menu-bar-update-hook run on mouse movement in mode-lin e

[Richard Stallman]

I think it might be feasible to implement code so that using
save-selected-window or save-window-excursion in a read-only way does not have
the effect of incrementing windows_or_buffers_changed.

It would require splitting up windows_or_buffers_changed into three
variables, one that records *only* changes in the selected window, one
that records changes in things that are part of the window
configuration, and one that does the rest of the job.  Then
save-selected-window and save-window-excursion could save and restore
some of these counters.

But change would also be needed in the code that sets
windows_or_buffers_changed when you alter a buffer that isn't what the
selected window shows.