Re: Print out my key-sequences

[Kevin Rodgers <kevin.d.rodgers@gmail.com>]

Andrea Crotti wrote:
> Kevin Rodgers <kevin.d.rodgers@gmail.com> writes:
> 
>> this-command-keys can return a vector containing elements other than
>> integers (characters) e.g. symbols for function keys and mouse events.  And
>> the vector can contain integers that cannot be put into a string.  See
>> the Strings of Events node of the Emacs Lisp manual.
>>
>> So first you have to find a robust way of converting the result of
>> this-command-keys to a string, so it can incorporated into the COMMAND
>> string argument to shell-command.  As Lennart suggested, key-description
>> is probably the way to go.
>>
>> And passing an arbitrary string as an argument to a program via
>> shell-command is itself risky, if it may contain a shell metacharacters
>> (which seems quite likely in this case).  So the string should be escaped
>> using shell-quote-argument, or you could use call-process instead of
>> shell-command to avoid the quoting issue.
>>
>> So:
>>
>> (defun growl-popup (msg)
>>   "Pop up a growl notification with MSG, or display an Emacs message.
>> The \"growlnotify\" program is used if `window-system' is non-nil and
>> the program is found in `exec-path'; otherwise `message' is used."
>>   (interactive)
>>   (if (and window-system (executable-find "growlnotify"))
>>       (shell-command (concat "growlnotify -a /Applications/Emacs.app/ -m "
>> 			     (shell-quote-argument msg)))
>>     (message msg)))

Oops, that should be (message "%s" msg)

>> (defun popup-last ()
>>   (interactive)
>>   (growl-popup (key-description (this-command-keys))))
> 
> 
> That's really nice thanks, I've added it to my configuration, with also
> two functions to enable/disable it.
> 
> I have to use setq-default to disable it by the way, is that correct?
> --8<---------------cut here---------------start------------->8---
>   (defun growl-mode-off ()
>     (interactive)
>     (setq-default pre-command-hook (remq 'popup-last pre-command-hook)))
> --8<---------------cut here---------------end--------------->8---
> 
> Only one more problem, here I display all the keys, but I don't really
> care about stuff like
> "C-n", "C-p", "m" (all the keys are inserted).
> 
> Is there any kind of distinction between simple and more complex
> combinations?

How about:

(unless (= (length (this-command-keys-vector)) 1)
   ...)

or:

(unless (eq (lookup-key global-map (this-command-keys)) this-command)
   ...)

or both:

(unless (and (= (length (this-command-keys-vector)) 1)
	     (eq (lookup-key global-map (this-command-keys)) this-command))
   ...)

-- 
Kevin Rodgers
Denver, Colorado, USA