automatic indentation in C,C++ modes

automatic indentation in C,C++ modes

[Tony Harbin]

How do I turn off all automatic indentation in C and C++ modes?  I find
this
behavior *VERY* annoying and would like to disable it permanently (i.e.
in the
.emacs file)

Thanks for your time.

Re: automatic indentation in C,C++ modes

[Greg Hill]

At 5:56 PM -0500 4/12/02, Tony Harbin wrote:
>How do I turn off all automatic indentation in C and C++ modes?  I find
>this
>behavior *VERY* annoying and would like to disable it permanently (i.e.
>in the
>.emacs file)
>
>Thanks for your time.

Tony,

If all you want is to insert a tab character at the beginning of a 
line when you type the tab key, try adding this to your .emacs file:

(add-hook 'c-mode-hook
	(function (lambda ()
		(substitute-key-definition
		'c-indent-command 'self-insert-command c-mode-map))))

(add-hook 'c++-mode-hook
	(function (lambda ()
		(substitute-key-definition
		'c-indent-command 'self-insert-command c++-mode-map))))

If, while you are at it, you also want to define the size of a tab 
as, say, 3 spaces, make it:

(add-hook 'c-mode-hook
	(function (lambda ()
		(substitute-key-definition
		'c-indent-command 'self-insert-command c-mode-map)
		(setq tab-width 3))))


--Greg

Re: automatic indentation in C,C++ modes

[Tony Harbin]

Not quite.  C/C++ mode binds open-paren, open-brace, colon, and slash (among

others) to "electric" functions that, when the key is typed, automatically
change
the spacing and/or indentation on the line.  I would like to
disable/override/turn off this behavior.  I was able to do this in an older
version where I had to explicitly load the C/C++ mode modules, but in my
current version (20.7.1), the stuff was already compiled in and the same
tricks no longer work.

Basically, I would just like those keys above to just self-insert and not
run the
"electric" functions.  Is there a way to do this?

Thanks.

Greg Hill wrote:

> At 5:56 PM -0500 4/12/02, Tony Harbin wrote:
> >How do I turn off all automatic indentation in C and C++ modes?  I find
> >this
> >behavior *VERY* annoying and would like to disable it permanently (i.e.
> >in the
> >.emacs file)
> >
> >Thanks for your time.
>
> Tony,
>
> If all you want is to insert a tab character at the beginning of a
> line when you type the tab key, try adding this to your .emacs file:
>
> (add-hook 'c-mode-hook
>         (function (lambda ()
>                 (substitute-key-definition
>                 'c-indent-command 'self-insert-command c-mode-map))))
>
> (add-hook 'c++-mode-hook
>         (function (lambda ()
>                 (substitute-key-definition
>                 'c-indent-command 'self-insert-command c++-mode-map))))
>
> If, while you are at it, you also want to define the size of a tab
> as, say, 3 spaces, make it:
>
> (add-hook 'c-mode-hook
>         (function (lambda ()
>                 (substitute-key-definition
>                 'c-indent-command 'self-insert-command c-mode-map)
>                 (setq tab-width 3))))
>
> --Greg

Re: automatic indentation in C,C++ modes

[Greg Hill]

Tony,

It just takes more of the same, e.g.:

(add-hook 'c-mode-hook
          (function (lambda ()
                  (substitute-key-definition
                  'c-indent-command 'self-insert-command c-mode-map)
                  (substitute-key-definition
                  'c-electric-paren 'self-insert-command c-mode-map))))

M-x apropos
	c-electric

will give you a list of all the c-electric-  commands.  Just use 
substitute-key-definition in your c-mode-hook and c++-mode-hook 
lambdas to replace any of them that you don't want with 
self-insert-command.  If you want to keep the automatic indentation 
performed by the TAB key and ditch only the "electric" stuff, then 
just leave the substitution for c-indent-command out of your lambdas.

--Greg



At 11:51 AM -0500 4/15/02, Tony Harbin wrote:
>Not quite.  C/C++ mode binds open-paren, open-brace, colon, and slash (among
>
>others) to "electric" functions that, when the key is typed, automatically
>change
>the spacing and/or indentation on the line.  I would like to
>disable/override/turn off this behavior.  I was able to do this in an older
>version where I had to explicitly load the C/C++ mode modules, but in my
>current version (20.7.1), the stuff was already compiled in and the same
>tricks no longer work.
>
>Basically, I would just like those keys above to just self-insert and not
>run the
>"electric" functions.  Is there a way to do this?

Re: automatic indentation in C,C++ modes

[Tony Harbin]

No go.  I've inserted these commands into my .emacs file, but still, when I type
a "(", the line gets re-indented.  Also, when I do a "C-h k (", the key is still
described as running c-electric-paren.

I had this behavior turned off in an older version on Solaris, but the methods
that I used there no longer work.  The best solution would be to remap the
'(', '{', ':', and '/' keys to simple self-insert-command functions.  I have a
particular indentation style that is common where I work and I *hate* some
software trying to enforce it's own style.

Any other suggestions?  Thanks in advance.

Greg Hill wrote:

> Tony,
>
> It just takes more of the same, e.g.:
>
> (add-hook 'c-mode-hook
>           (function (lambda ()
>                   (substitute-key-definition
>                   'c-indent-command 'self-insert-command c-mode-map)
>                   (substitute-key-definition
>                   'c-electric-paren 'self-insert-command c-mode-map))))
>
> M-x apropos
>         c-electric
>
> will give you a list of all the c-electric-  commands.  Just use
> substitute-key-definition in your c-mode-hook and c++-mode-hook
> lambdas to replace any of them that you don't want with
> self-insert-command.  If you want to keep the automatic indentation
> performed by the TAB key and ditch only the "electric" stuff, then
> just leave the substitution for c-indent-command out of your lambdas.
>
> --Greg
>
> At 11:51 AM -0500 4/15/02, Tony Harbin wrote:
> >Not quite.  C/C++ mode binds open-paren, open-brace, colon, and slash (among
> >
> >others) to "electric" functions that, when the key is typed, automatically
> >change
> >the spacing and/or indentation on the line.  I would like to
> >disable/override/turn off this behavior.  I was able to do this in an older
> >version where I had to explicitly load the C/C++ mode modules, but in my
> >current version (20.7.1), the stuff was already compiled in and the same
> >tricks no longer work.
> >
> >Basically, I would just like those keys above to just self-insert and not
> >run the
> >"electric" functions.  Is there a way to do this?
>
> _______________________________________________
> Help-gnu-emacs mailing list
> Help-gnu-emacs@gnu.org
> http://mail.gnu.org/mailman/listinfo/help-gnu-emacs

Emacs as web server

[Greg Hill]

If anyone has any experience using Emacs as a web server, I would be 
delighted to talk with you about it off-forum.  I am not having any 
particular problems.  I would just like to compare notes and possibly 
exchange relevant Lisp code.

--Greg

Re: automatic indentation in C,C++ modes

[G Anna]

> Date: Fri, 19 Apr 2002 12:30:46 -0500
> From: Tony Harbin <tharbin@hiwaay.net>
> Subj: Re: automatic indentation in C,C++ modes

[snip]

> self-insert-command functions.  I have a particular indentation
> style that is common where I work and I *hate* some software trying
> to enforce it's own style.

My understanding is that GNU Emacs doesn't do anything unless its
asked to do so.  Below, I am quoting an extract from the Emacs info
documentation.  Is this of any help?

<info>
Electric C Characters

   In C mode and related modes, certain printing characters are
"electric"--in addition to inserting themselves, they also reindent
the current line and may insert newlines.  This feature is controlled
by the variable `c-auto-newline'.  The "electric" characters are `{',
`}', `:', `#', `;', `,', `<', `>', `/', `*', `(', and `)'.

   Electric characters insert newlines only when the "auto-newline"
feature is enabled (indicated by `/a' in the mode line after the mode
name).  This feature is controlled by the variable `c-auto-newline'.
You can turn this feature on or off with the command `C-c C-a':

`C-c C-a'
     Toggle the auto-newline feature (`c-toggle-auto-state').  With a
     prefix argument, this command turns the auto-newline feature on if
     the argument is positive, and off if it is negative.
</info>

HTH

anna

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Re: automatic indentation in C,C++ modes

[Tony Harbin]

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Thanks to all who helped with this.  I finally found the answer.

In my .emacs file, I had 2 lines:

(autoload 'c++-mode "cc-mode" "C++ Editing Mode" t)
(autoload 'c-mode   "cc-mode" "C Editing Mode" t)

However, near as I can tell, these did not actually load anything until a
file matching the mode criteria was visited.  Any lines referencing any
variables
defined by those modes were not defined in emacs' scope until a file of the
mode type was visited.  By then it's too late to affect any of the
variables.  By changing
the lines to:

(load "cplus-md.elc")
(load "c-mode.elc")

The variables (especially c-auto-newline...thanks G Anna!) are now defined
and can be manipulated; in my case, to turn off the auto-indentation
feature:

(setq c-auto-newline nil)

This gets me what I need, but is it wasteful?



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