Problems with 'd' and 'delete' key

Problems with 'd' and 'delete' key

[saneman]

I have redefined C-d to comment/uncomment. But when I press delete it 
also inserts a comment (% i latex mode). Is it possible to assign 
something to the key 'd' without change 'delete'?

I have this in my .emacs file:


(global-set-key "\C-d" 'comment-dwim)
(define-key function-key-map [delete] [deletechar])

But delete still inserts a comment instead of deleting a character.

Re: Problems with 'd' and 'delete' key

[Pascal Bourguignon]

saneman <ddd@sdf.com> writes:

> I have redefined C-d to comment/uncomment. But when I press delete it
> also inserts a comment (% i latex mode). Is it possible to assign
> something to the key 'd' without change 'delete'?
>
> I have this in my .emacs file:
>
>
> (global-set-key "\C-d" 'comment-dwim)
> (define-key function-key-map [delete] [deletechar])
> But delete still inserts a comment instead of deleting a character.

That's strange.   The doc of define-key doesn't mention vectors for
the def argument.  

I would just write:

    (global-set-key (kbd "C-d") 'comment-dwim)

This shouldn't change the binding of the delete key.
Note that (string= "\C-d" "C-d").


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Re: Problems with 'd' and 'delete' key

[saneman]

Pascal Bourguignon wrote:
> saneman <ddd@sdf.com> writes:
> 
>> I have redefined C-d to comment/uncomment. But when I press delete it
>> also inserts a comment (% i latex mode). Is it possible to assign
>> something to the key 'd' without change 'delete'?
>>
>> I have this in my .emacs file:
>>
>>
>> (global-set-key "\C-d" 'comment-dwim)
>> (define-key function-key-map [delete] [deletechar])
>> But delete still inserts a comment instead of deleting a character.
> 
> That's strange.   The doc of define-key doesn't mention vectors for
> the def argument.  
> 
> I would just write:
> 
>     (global-set-key (kbd "C-d") 'comment-dwim)
> 
> This shouldn't change the binding of the delete key.
> Note that (string= "\C-d" "C-d").
> 
> 

I have now tried:

(global-set-key (kbd "C-d") 'comment-dwim)

instead but that also changes the delete key. Could it be a bug in 
emacs? I am using a danish keyboard.

Re: Problems with 'd' and 'delete' key

[djfiander]

On Apr 20, 11:26 am, saneman <d...@sdf.com> wrote:
> Pascal Bourguignon wrote:
> > saneman <d...@sdf.com> writes:
> >> (global-set-key "\C-d" 'comment-dwim)
> >> (define-key function-key-map [delete] [deletechar])
> >> But delete still inserts a comment instead of deleting a character.
>
> > That's strange.   The doc of define-key doesn't mention vectors for
> > the def argument.

Well, I just switched to Emacs and hit C-h k [delete] and was informed
that

        C-d (translated from <delete>) runs the command delete-char

(Personally, I also question the wisdom of remapping a very basic
control character, but let's leave that aside.)

[delete] is translated to C-d by the function-key-map. See also the
comment in bindings.el:

;; Don't do this.  We define <delete> in function-key-map instead.
;(define-key global-map [delete] 'backward-delete-char)

So, in order for everything to work the way you want, you need to put
this partially untested code in your .emacs file

;; define [delete] in global-map with what it would be if it weren't
being mapped by the function-key-map
(let ((delete-mapping (lookup-key function-key-map [delete])))
  (when delete-mapping
    (define-key global-map [delete] (lookup-key (current-global-map)
delete-mapping))))

;; Assuming you have the delete mapping defined above, you don't
really need to do this, it looks like
(define-key function-key-map [delete] nil)

(global-set-key "\C-d" 'comment-dwim)

But don't. Really.

Re: Problems with 'd' and 'delete' key

[saneman]

djfiander wrote:
> On Apr 20, 11:26 am, saneman <d...@sdf.com> wrote:
>> Pascal Bourguignon wrote:
>>> saneman <d...@sdf.com> writes:
>>>> (global-set-key "\C-d" 'comment-dwim)
>>>> (define-key function-key-map [delete] [deletechar])
>>>> But delete still inserts a comment instead of deleting a character.
>>> That's strange.   The doc of define-key doesn't mention vectors for
>>> the def argument.
> 
> Well, I just switched to Emacs and hit C-h k [delete] and was informed
> that
> 
>         C-d (translated from <delete>) runs the command delete-char
> 
> (Personally, I also question the wisdom of remapping a very basic
> control character, but let's leave that aside.)
> 
> [delete] is translated to C-d by the function-key-map. See also the
> comment in bindings.el:
> 
> ;; Don't do this.  We define <delete> in function-key-map instead.
> ;(define-key global-map [delete] 'backward-delete-char)
> 
> So, in order for everything to work the way you want, you need to put
> this partially untested code in your .emacs file
> 
> ;; define [delete] in global-map with what it would be if it weren't
> being mapped by the function-key-map
> (let ((delete-mapping (lookup-key function-key-map [delete])))
>   (when delete-mapping
>     (define-key global-map [delete] (lookup-key (current-global-map)
> delete-mapping))))
> 
> ;; Assuming you have the delete mapping defined above, you don't
> really need to do this, it looks like
> (define-key function-key-map [delete] nil)
> 
> (global-set-key "\C-d" 'comment-dwim)
> 
> But don't. Really.


It almost seems to work. But when I press delete it works as backspace 
(deleting backward). Is there someway to get the normal delete key 
behavior where the cursor don't move but deletes characters in front?

I think the command is called delete-char but where should it be added?

Re: Problems with 'd' and 'delete' key

[saneman]

  > It almost seems to work. But when I press delete it works as backspace
> (deleting backward). Is there someway to get the normal delete key 
> behavior where the cursor don't move but deletes characters in front?
> 
> I think the command is called delete-char but where should it be added?

I now get the correct behavior with just these two lines:

(define-key global-map [delete] 'delete-char)
(global-set-key "\C-d" 'comment-dwim)