Re: Shift selection using interactive spec

[Thomas Lord]

Lennart Borgman (gmail) wrote:
> But I think there also must be ways to easily and permanently escape 
> the deactivation. For some bindings there is no way to get a shifted 
> binding. (An example of this is using % in Viper to move to the 
> opposite parenthesis.)

In other words, you want a "shift-select-mode" lock -- like "caps lock"
but for shift select?

In the three-variable model, when a command returns, the
command loop does:

 (setq tentative-mark preserved-tentative-mark)

Adding shift-mode-lock support changes that to:

 (if shift-mode-lock
   (setq preserved-tentative-mark maybe-preserved-tentative-mark))
 (setq tentative-mark perserved-tentative-mark)





> > 2. Shift selection commands activate the mark if it is not active, and
> > extends the region if the mark is activate.  Thus [S-right right
> > right] would do the same thing as [S-right S-right S-right].  This
> > would be rather easy to implement.  Though this behavior sounds
> > strange, it actually mirrors the way mouse selection currently works
> > in transient-mark-mode.
>
> Such behaviour would be a disaster for manu users, especially new 
> users that are used to 1 above.


"Disaster" is a well chosen word, there.   Using arrow keys to
cancel a tentative mark is actually part of "how people use"
shift select.   It's a gesture that gets built-in to muscle memory.

-t