From: pjb@informatimago.com (Pascal J. Bourguignon)
To: help-gnu-emacs@gnu.org
Subject: Re: Tabs and Spaces
Date: Mon, 25 May 2009 15:48:44 +0200 [thread overview]
Message-ID: <7czld19ttv.fsf@pbourguignon.anevia.com> (raw)
In-Reply-To: 77vgiiF1jjcfrU1@mid.individual.net
use.address@my.homepage.invalid (Chris Gordon-Smith) writes:
> Pascal J. Bourguignon <pjb@informatimago.com> wrote:
>> use.address@my.homepage.invalid (Chris Gordon-Smith) writes:
>>
>>> Hello All
>>>
>>> I have recenly started using emacs for programming, after years using
>>> KDevelop. One problem I have is indenting code. I have my own indentation
>>> style. and ideally I would like to setup emacs to support it automatically.
>>> However, in the short term I'll settle for having emacs convert a TAB
>>> keypress into the correct number of spaces to fill whitespace up to the
>>> next tabstop.
>>>
>>> At the moment I have
>>>
>>> (global-set-key (kbd "TAB") 'self-insert-command)
>>>
>>> in my .emacs to force insertion of a tab, but I have to keep invoking
>>> untabify manually (otherwise my code looks misaligned when I upload it to
>>> Google Code).
>>>
>>> Can anyone help.
>>
>> You shouldn't insert TAB, this is very bad. At the very least, you
>> may compute the number of spaces you need to insert and insert them
>> rather.
> Yes, that's what I would like to do. Can you suggest how to do this. Do I
> need to put something in my .emacs file. What would it look like?
>
>>
>> But depending on the language you use, a different mode will be used
>> to edit your source and each mode may provide its own indenting rules.
>>
>> In the case of Lisp, you may add a indent-function property to the
>> plist of the operator name.
>>
>> In the case of C, you may customize the variable: c-offsets-alist. See
>> also: c-style-alist ; perhaps there's already a style defined that
>> you'll like.
In my post, there was a subliminal question, but it didn't reach your
consciousness, I'm sorry. Here it is:
What programming language do you use?
Depending on the answer you give, you may well have nothing to program.
Otherwise, you could do something like this:
(defconst +space+ 32 "ASCII code for the space character")
(defun my-language/indent-line ()
(interactive)
(let ((where (let ((m (make-marker))) (set-marker m (point)) m))
(indent (my-language/get-indent-from-some-parsing-around (point))))
(beginning-of-line)
(looking-at "^[ \t]*")
(delete-region (beginning-of-line) (match-end))
(goto-char (beginning-of-line))
(insert (make-string indent +space+))
(goto-char where)
(set-marker where nil)))
(local-set-key (kbd "TAB") 'my-language/indent-line)
Of course, all the difficulty (or simplicity, depends on your language)
is in implementing my-language/get-indent-from-some-parsing-around.
--
__Pascal Bourguignon__
next prev parent reply other threads:[~2009-05-25 13:48 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-05-25 10:48 Tabs and Spaces Chris Gordon-Smith
2009-05-25 11:48 ` Pascal J. Bourguignon
2009-05-25 12:17 ` Chris Gordon-Smith
2009-05-25 13:48 ` Pascal J. Bourguignon [this message]
2009-05-25 14:58 ` Chris Gordon-Smith
2009-05-25 15:10 ` Teemu Likonen
2009-05-25 15:58 ` Chris Gordon-Smith
2009-05-25 16:38 ` Pascal J. Bourguignon
2009-05-25 15:14 ` Pascal J. Bourguignon
2009-05-25 15:36 ` Richard Riley
2009-05-25 16:10 ` Pascal J. Bourguignon
2009-05-25 16:19 ` Richard Riley
2009-05-25 16:15 ` B Smith-Mannschott
2009-05-25 17:03 ` Drew Adams
2009-05-25 21:45 ` Chris Gordon-Smith
2009-05-26 1:08 ` Pascal J. Bourguignon
2009-05-26 21:31 ` Chris Gordon-Smith
2009-05-26 22:03 ` Drew Adams
[not found] ` <mailman.7877.1243375379.31690.help-gnu-emacs@gnu.org>
2009-05-26 22:40 ` Pascal J. Bourguignon
2009-05-27 20:38 ` Chris Gordon-Smith
[not found] ` <mailman.7772.1243271023.31690.help-gnu-emacs@gnu.org>
2009-05-25 21:48 ` Chris Gordon-Smith
[not found] ` <mailman.7771.1243268169.31690.help-gnu-emacs@gnu.org>
2009-05-26 12:29 ` Francis Moreau
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