[R-SIG-Mac] cmd-return in editor does not go to next line

MHH Stevens HStevens at muohio.edu
Wed Mar 5 11:46:22 CET 2008

In Aquamacs, I most often use C-c C-n; this submits a line and step  
to next. I like it because I can keep my left pinkie finger on the  
Crtl key to execute it. (I am not much of a typist).
On Mar 5, 2008, at 4:44 AM, Tim Cole wrote:

> I can see the benefit of single stepping in some cases, but I
> wouldn't want to lose the current behaviour.
> Whiile on the subject, cmd-return has an odd feature. Once a line has
> been submitted using cmd-return, it needs two returns not one to move
> from the end of the line to the next. I suspect this is not intended
> - can it be changed?
> Thanks,
> Tim
> On 05/03/2008, at 5:03 AM, Duncan Murdoch wrote:
>>  On 3/4/2008 2:31 PM, Simon Urbanek wrote:
>>>  Rune,
>>>  On Mar 4, 2008, at 1:12 PM, Rune Maagensen wrote:
>>>>  I've just started using R 2.62 on OSX 10.4.11 on a macbook 2,1 and
>>>>  found that in the Editor on Windows ctrl-R runs the current  
>>>> line and
>>>>  goes to the next line. On Mac cmd-return runs the current line and
>>>>  stays there. Shouldn't the cursor go to the next line, so a  
>>>> program
>>>>  can be run stepwise with multiple cmd-rtn instead of cmd-rtn down-
>>>>  arrow?
>>>  It was not designed to do so, but clearly it could be changed,  I'm
>>>  not sure it's good idea, though, as it combines an action  
>>> (execute a
>>>  line) with a change of selection and that is usually not  
>>> desirable (I
>>>  know that WIndows is known to breach UI design principles all over
>>>  the
>>>  place, but that's another story). Most commonly one uses  
>>> selection to
>>>  select the program/function that will be run instead and you don't
>>>  want to change the position there. Any comments on this from other
>>>  users?
>>  In Windows the mental image is that there are two functions attached
>>  to
>>  Ctrl-R:
>>  - if something is selected, then submit it.
>>  - if not, then single step through the script.
>>  The second function is what Rune is asking about.  I'd say it's good
>>  to
>>  have a "single step" function on a key.  It doesn't need to be the
>>  same
>>  key as "submit the selection", but it doesn't seem to lead to
>>  confusion
>>  if it is.
>>  On a Mac in the Xcode debugger, what's the key for single stepping?
>>  (My
>>  Mac is at home, I can't check.)  It would make a lot of sense to use
>>  that key for single stepping in the script editor too.
> --
> Tim.Cole at ich.ucl.ac.uk Phone +44(0)20 7905 2666 Fax +44(0)20 7905 2381
> Paed. Epid. & Biostats, UCL Institute of Child Health, London WC1N  
> 1EH, UK
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