death to tabs

death to tabs

[John Russell]

Ok, seriously, I don't ever want to see another tab as long as I
live.  I want _every__ tab I ever wrote converted to spaces right
now and I never want to have a tab show up when I hit the TAB key
again.  All spaces all the time.  

I found 
  (setq indent-tabs-mode nil)

for future tab annihilation but how can I convert a doc with tabs in
it to just spaces.  Thanks for the help.

John

PS sorry for the brusque tone.  Its just one of those last straw things.

Re: death to tabs

[greg jednaszewski]

John Russell <jorussel@cisco.com> wrote:
> for future tab annihilation but how can I convert a doc with tabs in
> it to just spaces.  Thanks for the help.

M-x untabify

will convert all tabs in a region to spaces.

-- 
Greg Jednaszewski   | "Man, it must be great bein' you, lookin'
greg@attenuated.org |  at me!"  -J.B.

RE: death to tabs

[Sebastien Routier]

No need to apologies about your tone!! It is understandable. I was just
talking about this to a colleague how was about to blow a fuse!!

For all of you who have to deal with ignorant-tab-lovers/notepad-users here
is what I use:

(defun my-untabify-buffer ()
  "Run Untabify against the current buffer."
  (interactive)
  (untabify (point-min) (point-max))
  (message "Untabify Complete"))
;;
(define-key global-map [f9] 'my-untabify-buffer)


I almost hooked it to find-file but thought that that might be going a
little too far!!!

bye.
/Sebast


:
####[ Linux One Stanza Tip (LOST) ]###########################

Sub : Knowing kernel version on running box (#1)     LOST #267

To know the kernel version  currently  running on a box, use
uname. 'uname -a' will give a print out of  ALL details like
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####<prashanthninan@yahoo.com>################################
:



> -----Original Message-----
> From: John Russell [mailto:jorussel@cisco.com]
> Sent: Friday, April 04, 2003 3:23 PM
> To: help-gnu-emacs@gnu.org
> Subject: death to tabs 
> 
> 
> 
> Ok, seriously, I don't ever want to see another tab as long as I
> live.  I want _every__ tab I ever wrote converted to spaces right
> now and I never want to have a tab show up when I hit the TAB key
> again.  All spaces all the time.  
> 
> I found 
>   (setq indent-tabs-mode nil)
> 
> for future tab annihilation but how can I convert a doc with tabs in
> it to just spaces.  Thanks for the help.
> 
> John
> 
> PS sorry for the brusque tone.  Its just one of those last 
> straw things.
> _______________________________________________
> Help-gnu-emacs mailing list
> Help-gnu-emacs@gnu.org
> http://mail.gnu.org/mailman/listinfo/help-gnu-emacs
> 

Re: death to tabs

[Bijan Soleymani]

John Russell <jorussel@cisco.com> writes:

> Ok, seriously, I don't ever want to see another tab as long as I
> live.  I want _every__ tab I ever wrote converted to spaces right
> now and I never want to have a tab show up when I hit the TAB key
> again.  All spaces all the time.  
> 
> I found 
>   (setq indent-tabs-mode nil)
> 
> for future tab annihilation but how can I convert a doc with tabs in
> it to just spaces.  Thanks for the help.
> 
> John
> 
> PS sorry for the brusque tone.  Its just one of those last straw things.

M-x untabify convert all tabs in region to multiple spaces.

So select the entire document, and then run untabify.

Bijan

Re: death to tabs

[Peter Lee]

John Russell <jorussel@cisco.com> writes:

> Ok, seriously, I don't ever want to see another tab as long as I
> live.  I want _every__ tab I ever wrote converted to spaces right
> now and I never want to have a tab show up when I hit the TAB key
> again.  All spaces all the time.  
> 
> I found 
>   (setq indent-tabs-mode nil)
> 
> for future tab annihilation but how can I convert a doc with tabs in
> it to just spaces.  Thanks for the help.


C-x h
M-x untabify<RET>

Re: death to tabs

[Benjamin Rutt]

John Russell <jorussel@cisco.com> writes:

> Ok, seriously, I don't ever want to see another tab as long as I
> live.  I want _every__ tab I ever wrote converted to spaces right
> now and I never want to have a tab show up when I hit the TAB key
> again.  All spaces all the time.  
>
> I found 
>   (setq indent-tabs-mode nil)

I think to set this globally, you actually want 

    (setq-default indent-tabs-mode nil)

in your ~/.emacs, since indent-tabs-mode is one of those variables
which becomes buffer-local when set in any fashion.
-- 
Benjamin

Re: death to tabs

[Bruce Korb]

John Russell <jorussel@cisco.com> writes:
> 
> > Ok, seriously, I don't ever want to see another tab as long as I
> > live.  I want _every__ tab I ever wrote converted to spaces right
> > now and I never want to have a tab show up when I hit the TAB key
> > again.  All spaces all the time.

I agree!  We'll never write another makefile, either.

Re: death to tabs

[chris.danx]

John Russell wrote:
> Ok, seriously, I don't ever want to see another tab as long as I
> live.  I want _every__ tab I ever wrote converted to spaces right
> now and I never want to have a tab show up when I hit the TAB key
> again.  

Amen to that!  Working on files at home then at uni or vice versa screws 
up the tabs all the time! Our lecturers code drives me mad!  Some of 
their code is indented 2 spaces while others use non standard tab 
offsets with multiple tabs and when we add new code it goes all wonky 
because of tabs :(

What I'd like is for emacs to create new files without tabs and detect 
if a file uses tabs & guess the right offset to preserve others 
preference or retabify everything to make it neat (and have tabs only 
for makefiles).  Failing that I am prepared to damn them all and use 
Sebatien Routers code! :)


Anyone help with this?
Danx

Re: death to tabs

[Thomas A. Horsley]

>I want _every__ tab I ever wrote converted to spaces right now and I never
>want to have a tab show up when I hit the TAB key again.

Me too, unfortunately I still need to use "make" (most versions of
which moronically require TAB chars at the start of actions, even though
if you accidentally put spaces there, it always complains about
an error in the file - if it can recognize spaces as errors, why
can't it just pretend they were tabs :-).

Anyway, I still nil out indent-tabs-mode, and just use quoted-insert to add
real TABs to Makefiles. By the way, you really want:

   (setq-default indent-tabs-mode nil)

otherwise you have to keep setting it again for every buffer.
--
>>==>> The *Best* political site <URL:http://www.vote-smart.org/> >>==+
      email: Tom.Horsley@worldnet.att.net icbm: Delray Beach, FL      |
<URL:http://home.att.net/~Tom.Horsley> Free Software and Politics <<==+

Re: death to tabs

[Thomas A. Horsley]

>Amen to that!  Working on files at home then at uni or vice versa screws up
>the tabs all the time! Our lecturers code drives me mad!  Some of their code
>is indented 2 spaces while others use non standard tab offsets with multiple
>tabs and when we add new code it goes all wonky because of tabs :(

Aside from merely using M-x untabify, you can also M-x set-variable and
change the tab-width variable first. That way if you can deduce (perhaps by
deciding which tab-width results in the most readable display) the value the
moron who wrote the code was using for tab-width, you can then untabify
after setting tab-width.

Of course, the true villian in the whole TAB story is the unknown (to me,
anyway) Prince of Evil who designed the first editor which allowed you to
change the tab width to be something other than 8, thus removing text
formatting information from the file, and placing it only in the brain of
the author (where it is unlikely to be recoverable by those who follow
after).

(Or worse yet, in the brains of multiple authors over time, all of
whom used different default values for the chunk of code they were
working on).

Of course, worse than TABs in Makefiles, there is Python - the language that
actually gives meaning to whitespace, yet also allows TABs in input source
files, (if you think other languages are wonky with TABs in 'em...)
--
>>==>> The *Best* political site <URL:http://www.vote-smart.org/> >>==+
      email: Tom.Horsley@worldnet.att.net icbm: Delray Beach, FL      |
<URL:http://home.att.net/~Tom.Horsley> Free Software and Politics <<==+

Re: death to tabs

[Roy Smith]

Benjamin Rutt <rutt+news@cis.ohio-state.edu> wrote:

> John Russell <jorussel@cisco.com> writes:
> 
> > Ok, seriously, I don't ever want to see another tab as long as I
> > live.  I want _every__ tab I ever wrote converted to spaces right
> > now and I never want to have a tab show up when I hit the TAB key
> > again.  All spaces all the time.  
> >
> > I found 
> >   (setq indent-tabs-mode nil)
> 
> I think to set this globally, you actually want 
> 
>     (setq-default indent-tabs-mode nil)
> 
> in your ~/.emacs, since indent-tabs-mode is one of those variables
> which becomes buffer-local when set in any fashion.

I've had trouble getting the global default value to not be over-ridden 
locally in each buffer.  What I do now is set it in my C mode hook:

(add-hook 'c-mode-hook 'my-c-mode-hook t)
(add-hook 'c++-mode-hook 'my-c-mode-hook t)
(defun my-c-mode-hook ()
  (c-set-style "linux")
  (line-number-mode 1)
  (setq indent-tabs-mode nil)
  (setq c-basic-offset 4))

I'm not sure if this is the "right" way to do it, but it seems to do 
what I want, so I'm happy.

Re: death to tabs

[Roy Smith]

tom.horsley@att.net (Thomas A. Horsley) wrote:
> Of course, worse than TABs in Makefiles, there is Python - the language that
> actually gives meaning to whitespace, yet also allows TABs in input source
> files, (if you think other languages are wonky with TABs in 'em...)

Surely you've heard of

http://compsoc.dur.ac.uk/whitespace/

I'm waiting for somebody to announce that they've written an emacs mode 
for it :-)

Re: death to tabs

[Benjamin Rutt]

Roy Smith <roy@panix.com> writes:

> I've had trouble getting the global default value to not be over-ridden 
> locally in each buffer.  What I do now is set it in my C mode hook:
>
> (add-hook 'c-mode-hook 'my-c-mode-hook t)
> (add-hook 'c++-mode-hook 'my-c-mode-hook t)
> (defun my-c-mode-hook ()
>   (c-set-style "linux")
>   (line-number-mode 1)
>   (setq indent-tabs-mode nil)
>   (setq c-basic-offset 4))
>
> I'm not sure if this is the "right" way to do it, but it seems to do 
> what I want, so I'm happy.

Yes, I think both setting the global default and setting it as you
wish per-mode is the right way to approach this problem.  Each major
mode is free to override the default.  Having the default set to nil,
however, probably means that you'll have to use hooks like the above
less often.  Just watch out for Makefiles which require leading TABs,
as another poster mentioned.
-- 
Benjamin

Re: death to tabs

[Kai Großjohann]

tom.horsley@att.net (Thomas A. Horsley) writes:

> Of course, the true villian in the whole TAB story is the unknown (to me,
> anyway) Prince of Evil who designed the first editor which allowed you to
> change the tab width to be something other than 8, thus removing text
> formatting information from the file, and placing it only in the brain of
> the author (where it is unlikely to be recoverable by those who follow
> after).

Actually, if used right, tabs in source code can be useful.  You
know, some people prefer an indentation offset of 2, some prefer 4,
and still others prefer still other numbers.  If each indentation
level was indicated by a tab char, all those people could have their
preferred viewing experience without changing the file.  If you use
spaces, you impose your preference on the others.

There is a problem of alignment, though.  This needs to be done in a
smart way.  Here's my idea on it.  Look at this code:

if ( a == b ) {
    //-1
    if ( some_long_variable ==
         another_long_variable ) {
        //-2
        do_something();
        do_something_else();
    }
}

I use an offset of 4, as you can see.  The comments mark the
indentation levels.  So the second if statement should be preceded by
one tab.  The "another_long_variable" line should also start with one
tab, then it should have 5 spaces for alignment.  The do_something
lines should start with two tabs each.

If this was the case, then others could take the code and view it
with a different tab-width setting and everything would still look
right.  In particular, some_long_variable and another_long_variable
would still be aligned!

I would really like if this were to happen.  But it's not going to
happen anytime soon, I'm afraid.
-- 
A preposition is not a good thing to end a sentence with.

Re: death to tabs

[Luis O. Silva]

Hi Benjamin,

On Fri, 04 Apr 2003 18:11:29 -0500, Benjamin Rutt writes:

   BR> I think to set this globally, you actually want

   BR>     (setq-default indent-tabs-mode nil)

   BR> in your ~/.emacs, since indent-tabs-mode is one of
   BR> those variables which becomes buffer-local when set in
   BR> any fashion.

Please be indulgent with my ignorance. I have set
`indent-tabs-mode' to nil through `custom-set-variables' and
the setting seems to be global. Should I infer from this that
`custom-set-variables' acts like `setq-default'?

Thanks in advance for enlightenment.
luis

-- 
Luis Octavio Silva P.
St. Petersburg State University.
66/3 Botanicheskaya St., Apt.119/2
Stary Peterhof
St. Petersburg, Russia.
+---------------------------------+
|     WE ARE NOT DOING ENOUGH!    |
| We haven't been able to prevent |
|    criminal governments from    |
|    killing people for profit    |
+---------------------------------+

Re: death to tabs

[Benjamin Rutt]

"Luis O. Silva" <silva@paloma.spbu.ru> writes:

> Please be indulgent with my ignorance. I have set
> `indent-tabs-mode' to nil through `custom-set-variables' and
> the setting seems to be global. Should I infer from this that
> `custom-set-variables' acts like `setq-default'?

I expect that custom does the right thing both for variables that are
automatically buffer-local and for those that are not, but I can't
answer that for sure.
-- 
Benjamin

Re: death to tabs

[Stefan Kamphausen]

Hi John,

John Russell <jorussel@cisco.com> wrote in message news:<m3wuiaxb9d.fsf@debussy.cisco.com>...
> Ok, seriously, I don't ever want to see another tab as long as I
> live.  I want _every__ tab I ever wrote converted to spaces right
> now and I never want to have a tab show up when I hit the TAB key
> again.  All spaces all the time.  
> 
> I found 
>   (setq indent-tabs-mode nil)
> 
> for future tab annihilation but how can I convert a doc with tabs in
> it to just spaces.  Thanks for the help.

very old holy war that is...
You might be interested in reading
http://www.jwz.org/doc/tabs-vs-spaces.html

In contrast to the code mentioned there I'd use (make-local-hook
'write-contents-hook) instead of make-local-variable, use (when
(search-forward...)) instead of (if ..) and I chose to leave trailing
whitespaces in lines (to make them rectangle-selectable) so I removed
a few lines.

Best Regards
Stefan Kamphausen

Re: death to tabs

[Colin Marquardt]

"chris.danx" <spamoff.danx@ntlworld.com> writes:

> What I'd like is for emacs to create new files without tabs and
> detect if a file uses tabs & guess the right offset to preserve
> others preference or retabify everything to make it neat (and have
> tabs only for makefiles).

See http://www.emacswiki.org/cgi-bin/wiki.pl?GuessOffset
for a start on this.

HTH,
  Colin