Re: haml plus kill-rectangle hangs emacs

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

Audrey Lee wrote:
> Hello emacs people.
> 
> I have bumped into an issue with emacs when I try to kill-rectangle
> inside a file which is in haml-mode.
> 
> I see 2 symptoms:
> 
> 1. Emacs "hangs"
> 2. The emacs process start hogging 99% of the CPU on my Mac.
> 
> Here is info about my emacs:
> 
> GNU Emacs 22.3.1 (i386-apple-darwin9.6.0, Carbon Version 1.6.0)
>  of 2009-01-02 on seijiz.local
> 
> Question 1:
>   - In my .emacs, What might be some simple syntax I can use to
> disable kill-rectangle while I am in haml-mode ?

Commands can only be disabled globally, via the disabled property.

But you can disable a keybinding locally, via local-unset-key,
local-set-key, or define-key.  E.g.

(add-hook 'html-mode-hook
	  (lambda ()
	    (local-set-key (where-is-internal 'kill-rectangle
					      (current-local-map) t)
			   'undefined)))

> Question 2:
>   - In my .emacs, What might be some simple syntax I can use to
> connect a key to a function, but only for haml-mode, not globally.

(add-hook 'html-mode-hook
	  (lambda ()
	    (local-set-key SOME-KEY SOME-COMMAND)))

> Question 3:
>   - Does emacs have some kind of debugger I can use to tell me what
> files it is reading when I execute emacs commands?

Emacs has a debugger you can use all the time.  This is probably
too intrusive, but you get the idea:

(debug-on-entry 'load)

> These are the only emacs questions I can think of today.

Tomorrow is another day. :-)

-- 
Kevin Rodgers
Denver, Colorado, USA