[PATCH] Save and restore point explicitly in `notmuch-wash-toggle-invisible-action'.

[Austin Clements]

On Tue, May 24, 2011 at 6:16 PM, Dmitry Kurochkin
<dmitry.kurochkin at gmail.com> wrote:
> When a user clicks the button, the cursor is somewhere inside the old
> label.  If we save the point as a marker, after step 3 it would end up
> at the position where the old label was.  If the new label is inserted
> before the old one, that means after the new label.  So the cursor jumps
> from inside the button to the position after the button.  Since the new
> button is placed at the same position where the old one was, restoring
> the point to the same offset it was at the beginning works as we need.

Saving point this way is a bit dangerous, though.  For example, if
you're near the end of the buffer and shorten the label, attempting to
restore the point could result in an error (or, a more benign example:
the cursor could wind up outside the label so pressing RET repeatedly
won't toggle it).

Unfortunately, I don't know of a clean solution to this, but I think I
would rather the cursor move, but stay within the label (probably
moving to the beginning), than have problems like the above.