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Re: haml plus kill-rectangle hangs emacs

From: Kevin Rodgers
Subject: Re: haml plus kill-rectangle hangs emacs
Date: Tue, 06 Apr 2010 00:17:36 -0600
User-agent: Thunderbird (Macintosh/20100228)

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)

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

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