Re: compare-windows should allow backwards comparing

[Juri Linkov]

Dan Jacobson <jidanni@jidanni.org> writes:
> compare-windows should allow backwards comparing, i.e., marching
> upwards, not just always downwards.

Great idea!  I often need this too.  Like searching for a text with
C-s needs the reverse key C-r to return to the previous matches,
searching for the differences needs the reverse function too.

And it seems it is easily implementable: just changing `forward' to
`backward' in some function names and changing the sign in some
arithmetic operations.

But what would be the best UI for this?  `compare-windows' already
has a prefix arg `ignore-whitespace', so using a prefix key to
switch the direction is not possible.  Maybe creating the new
command `compare-windows-backward' is enough?

-- 
Juri Linkov
http://www.jurta.org/emacs/