Re: Shift-movement selection

[Stefan Monnier]

>>>>> So to make it work "correctly", you need to modify all commands in
>>>>> emacs!  [yikes!]
>>>> Most commands already deactivate the mark.  So which ones would be left?
>> 
>>> Anything that doesn't modify the buffer -- e.g. all movement commands.
>> 
>> Supposedly these will be changed to use the new function, so they will
>> explicitly deactivate the mark if the mark was activated with shift and
>> the movement is then performed without the shift.

> One problem is that basic movement commands are in C, not in Lisp.

Doesn't look like a problem to me.

> Another problem may be advise on functions - the "shift" handling
> may then be performed too late.

The way I see it, the (un)shift handling would be done in the
`interactive' spec of those commands.  Would that be too late?
In which circumstance?

> Personally, I like my proposal of just setting a "shift" property
> on the relevant commands, and do it by running a shifted-key-hook
> in the command loop.

This suffers from the same problems as pre/post-command-hook.

> That method has proven to work excellent with CUA mode!

I know that pre/post-command-hook work just fine for lots of things,
which is why they're provided.  But it's better to avoid them for core
functionality such as the functionality enabled by default.


        Stefan