line-move-down-up

line-move-down-up

[A Soare]

(defun line-move-down (n)
  (let ((column (current-column))
        (line (delete-and-extract-region
               (prog2 (beginning-of-line) (point))
               (prog2 (end-of-line) (1+ (point)) ))))
    (next-line n)
    (beginning-of-line)
    (insert-string line)
    (backward-char)
    (move-to-column column)
    'down
  ))

(define-key global-map [(meta up)] (lambda (&optional n) (interactive "P")
(line-move-down (if (numberp n) (- n) -1))))

(define-key global-map [(meta down)] (lambda (&optional n) (interactive "P")
(line-move-down (if (numberp n) n 1))))

Re: line-move-down-up

[Deniz Dogan]

2011/4/18 A Soare <as1789@gmail.com>:
>
> (defun line-move-down (n)
>  (let ((column (current-column))
>        (line (delete-and-extract-region
>               (prog2 (beginning-of-line) (point))
>               (prog2 (end-of-line) (1+ (point)) ))))
>    (next-line n)
>    (beginning-of-line)
>    (insert-string line)
>    (backward-char)
>    (move-to-column column)
>    'down
>  ))
>
> (define-key global-map [(meta up)] (lambda (&optional n) (interactive "P")
> (line-move-down (if (numberp n) (- n) -1))))
>
> (define-key global-map [(meta down)] (lambda (&optional n) (interactive "P")
> (line-move-down (if (numberp n) n 1))))
>

I'm not sure what this post is all about, but you could
replace (prog2 (beginning-of-line) (point)) with (point-at-bol)
and respectively for the end.

Also, (next-line n) (beginning-of-line) could be replaced
with (beginning-of-line (1+ n)).

-- 
Deniz Dogan

Re: line-move-down-up

[A Soare]

> >
> > (define-key global-map [(meta down)] (lambda (&optional n) (interactive "P")
> > (line-move-down (if (numberp n) n 1))))
> >
> 

> I'm not sure what this post is all about, but you could
> replace (prog2 (beginning-of-line) (point)) with (point-at-bol)
> and respectively for the end.

I proposed some useful function that do not exist. Yes, if they are useful, many
improvments can be done. For example, what to happen at the end of the buffer.

Re: line-move-down-up

[A Soare]

>
>

I have just received a reponse that transpose-line does the same job.

Yes, this is almost identical to transpose-line. But transpose-line behaves a
little different. This is why I forget all the time about that function, and
never use it.

> Also, (next-line n) (beginning-of-line) could be replaced
> with (beginning-of-line (1+ n)).
> 

This is wrong in general.


Alin

Re: line-move-down-up

[Deniz Dogan]

2011/4/18 A Soare <as1789@gmail.com>:
>> Also, (next-line n) (beginning-of-line) could be replaced
>> with (beginning-of-line (1+ n)).
>>
>
> This is wrong in general.
>

Care to elaborate?

Re: line-move-down-up

[A Soare]

Deniz Dogan <deniz.a.m.dogan <at> gmail.com> writes:

> 
> 2011/4/18 A Soare <as1789 <at> gmail.com>:
> >> Also, (next-line n) (beginning-of-line) could be replaced
> >> with (beginning-of-line (1+ n)).
> >>
> >
> > This is wrong in general.
> >
> 
> Care to elaborate?
> 
> 


(progn
  (goto-char (point-max))
  (insert ? )
  (beginning-of-line 4))

The definitive version I keep in .emacs is so:


;; move line

(defun line-move-down (n)
  (if (> (point-max) (point-at-eol))
      (let ((column (current-column) )
            (line (delete-and-extract-region (point-at-bol) (1+ (point-at-eol)))))
        (forward-line n)
        (insert-string line)
        (backward-char)
        (move-to-column column) ) ) )

(define-key global-map [(meta up)]
  (lambda (&optional n)
    (interactive "P")
    (line-move-down (if (numberp n) (- n) -1) ) ) )

(define-key global-map [(meta down)]
  (lambda (&optional n)
    (interactive "P")
    (line-move-down (if (numberp n) n 1) )  ) )

line-move-down-up

[Stephen J. Turnbull]

A Soare writes:
 > 
 > (defun line-move-down (n)
 >   (let ((column (current-column))

Oops, no interactive declaration.  I gather you haven't even tried
these functions at home?  Proposing two global bindings is a little
early I suppose....

Besides, if I understand what the function actually does, it's mostly
subsumed by transpose-lines, which already has a binding C-x C-t, and
(at least in the Emacsen I'm using) a nifty feature of exchanging the
lines containing point and mark respectively when the argument is 0.

Re: line-move-down-up

[A Soare]

>  > (defun line-move-down (n)
>  >   (let ((column (current-column))
> 
> Oops, no interactive declaration.  I gather you haven't even tried
> these functions at home?  Proposing two global bindings is a little
> early I suppose....
> 

Please read more carefully.


(define-key global-map [(meta down)] (lambda (&optional n) (interactive "P")
(line-move-down (if (numberp n) n 1))))

Re: line-move-down-up

[Alin Soare]

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2011/4/18 Stephen J. Turnbull <turnbull@sk.tsukuba.ac.jp>

> Alin Soare writes:
>
>  > > look better:
>  >
>  > (define-key global-map [(meta up)] (lambda (&optional n) (interactive
> "P")
>  > (line-move-down (if (numberp n) (- n) -1))))
>
> Yeah, sorry about that.
>
>  > But, yes. You are right.
>  >
>  > Transpose-lines does the job, but not as I wish.
>
> Of course it doesn't.  All defaults suck for somebody.  That's what
> .emacs is for.
>
> If you want to impose the burden of maintenance on the team, you need
> to explain why your version is an improvement for a lot of people.
>
>
I used the meta + up-down, using the model of spreadsheets of org-mode, that
I use. It is the most convenient conbination for me.

If I use C-x C-t, the cursor goes down, while the line goes up. I cannot
move the line the second time.

And this only transposes the line, not move the line.

I need move, not transpose, and I cannot find this in emacs.

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Re: line-move-down-up

[Davis Herring]

> If I use C-x C-t, the cursor goes down, while the line goes up. I cannot
> move the line the second time.

Which line?  Obviously one line is moving down if another is moving up. 
If you want point to move along with the upward-moving line rather than
the downward-moving one, use C-- C-x C-t (and then C-x z z ... as needed).

> And this only transposes the line, not move the line.

What's the difference?

Davis

-- 
This product is sold by volume, not by mass.  If it appears too dense or
too sparse, it is because mass-energy conversion has occurred during
shipping.

Re: line-move-down-up

[Alin Soare]

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>
> > If I use C-x C-t, the cursor goes down, while the line goes up. I cannot
> > move the line the second time.
>
> Which line?  Obviously one line is moving down if another is moving up.
> If you want point to move along with the upward-moving line rather than
> the downward-moving one, use C-- C-x C-t (and then C-x z z ... as needed).
>
> > And this only transposes the line, not move the line.
>
> What's the difference?
>
>
This is a good question. Please, can you write 2 lambda functions that
behaves exactly like the code below, and attach them to M-up , M-down ?

You should use only transpose-line, and none other function that deletes
text, like delete-and-extract-region, kill-line, etc.


(defun line-move-- (n)
  (if (> (point-max) (point-at-eol))
      (let ((column (current-column) )
            (line (delete-and-extract-region (point-at-bol) (1+
(point-at-eol)))))
        (forward-line n)
        (insert-string line)
        (backward-char)
        (move-to-column column) ) ) )

(define-key global-map [(meta up)]
  (lambda (&optional n)
    (interactive "P")
    (line-move-- (- (if (numberp n) n 1) ) ) ) )

(define-key global-map [(meta down)]
  (lambda (&optional n)
    (interactive "P")
    (line-move-- (if (numberp n) n 1) )  ) )

;;;;;

Using transpose-line , it is much direct to simulate line-move--down than I
did.

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Re: line-move-down-up

[Ivan Andrus]

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On Apr 18, 2011, at 5:56 PM, Alin Soare wrote:

> 2011/4/18 Stephen J. Turnbull <turnbull@sk.tsukuba.ac.jp>
> Alin Soare writes:
> 
>  > > look better:
>  >
>  > (define-key global-map [(meta up)] (lambda (&optional n) (interactive "P")
>  > (line-move-down (if (numberp n) (- n) -1))))
> 
> Yeah, sorry about that.
> 
>  > But, yes. You are right.
>  >
>  > Transpose-lines does the job, but not as I wish.
> 
> Of course it doesn't.  All defaults suck for somebody.  That's what
> .emacs is for.
> 
> If you want to impose the burden of maintenance on the team, you need
> to explain why your version is an improvement for a lot of people.
> 
> I used the meta + up-down, using the model of spreadsheets of org-mode, that I use. It is the most convenient conbination for me.
> 
> If I use C-x C-t, the cursor goes down, while the line goes up. I cannot move the line the second time.
> 
> And this only transposes the line, not move the line.
> 
> I need move, not transpose, and I cannot find this in emacs.

I also use this functionality, but I get it from drag-stuff.el (not written by me) which has the advantage of being on http://tromey.com/elpa/ .  It also has functionality for dragging words and region, though I rarely use it.  The only problem it has (for me) is that it interferes with org-mode's M-up/down, but you can fix that by setting `drag-stuff-except-modes'.

I have thought about adding the ability to drag defun's and such, but so far haven't taken the time.

-Ivan

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Re: line-move-down-up

[Deniz Dogan]

2011/4/19 Ivan Andrus <darthandrus@gmail.com>:
> On Apr 18, 2011, at 5:56 PM, Alin Soare wrote:
>
> 2011/4/18 Stephen J. Turnbull <turnbull@sk.tsukuba.ac.jp>
>>
>> Alin Soare writes:
>>
>>  > > look better:
>>  >
>>  > (define-key global-map [(meta up)] (lambda (&optional n) (interactive
>> "P")
>>  > (line-move-down (if (numberp n) (- n) -1))))
>>
>> Yeah, sorry about that.
>>
>>  > But, yes. You are right.
>>  >
>>  > Transpose-lines does the job, but not as I wish.
>>
>> Of course it doesn't.  All defaults suck for somebody.  That's what
>> .emacs is for.
>>
>> If you want to impose the burden of maintenance on the team, you need
>> to explain why your version is an improvement for a lot of people.
>
> I used the meta + up-down, using the model of spreadsheets of org-mode, that
> I use. It is the most convenient conbination for me.
>
> If I use C-x C-t, the cursor goes down, while the line goes up. I cannot
> move the line the second time.
>
> And this only transposes the line, not move the line.
>
> I need move, not transpose, and I cannot find this in emacs.
>
> I also use this functionality, but I get it from drag-stuff.el (not written
> by me) which has the advantage of being on http://tromey.com/elpa/ .  It
> also has functionality for dragging words and region, though I rarely use
> it.  The only problem it has (for me) is that it interferes with org-mode's
> M-up/down, but you can fix that by setting `drag-stuff-except-modes'.
> I have thought about adding the ability to drag defun's and such, but so far
> haven't taken the time.

I can't find drag-stuff when I do M-x package-list-packages.
Where can I find it?

-- 
Deniz Dogan

Re: line-move-down-up

[Ivan Andrus]

On Apr 19, 2011, at 11:34 AM, Deniz Dogan wrote:
> 
> I can't find drag-stuff when I do M-x package-list-packages.
> Where can I find it?

It's not on http://elpa.gnu.org/packages/ but rather on http://tromey.com/elpa/ or http://marmalade-repo.org/packages/ 

You have to set `package-archives' to include one of those addresses.  If you have already done so, then I don't know.

-Ivan