Inserting some text in a working buffer

Inserting some text in a working buffer

[michael-franzese]

Is it possible to insert some text in a working buffer starting flom the
beginning of the line.

Re: Inserting some text in a working buffer

[michael-franzese]

Have done this to write to the working buffer.  But if there is not enough space
till the end of the buffer, continuing to call "insert-text" will not insert.

(defun insert-text (text)
  "Inserts text frem beginning of line located at cursor point."
  (interactive)

  (with-current-buffer (buffer-name)
    (goto-char (point))
    (insert text)
    (next-line)) )





> Sent: Saturday, May 08, 2021 at 6:28 PM
> From: michael-franzese@gmx.com
> To: "Help Gnu Emacs" <help-gnu-emacs@gnu.org>
> Subject: Inserting some text in a working buffer
>
> Is it possible to insert some text in a working buffer starting flom the
> beginning of the line.
>
>
>
>

Re: Inserting some text in a working buffer

[Emanuel Berg via Users list for the GNU Emacs text editor]

michael-franzese wrote:

> (defun insert-text (text)
>   "Inserts text frem beginning of line located at cursor point."
>   (interactive)
>   (with-current-buffer (buffer-name)
>     (goto-char (point))
>     (insert text)
>     (next-line)) )

Hahaha :)

"(with-current-buffer (buffer-name)" - you are already in that
buffer...

and "(goto-char (point))" - you are already there!

"(next-line)" - see the help, one should use `forward-line'...

There is nothing in the code to do it "frem" beginning of line
but you can use `beginning-of-line' for that...

-- 
underground experts united
https://dataswamp.org/~incal

Re: Inserting some text in a working buffer

[michael-franzese]

Thank you Emanuel, glad you found the post amusing.

Apart further into giggles, I would  like to insert the text starting from the current
point to column position 62.  But with the following code, the text is being inserted
before (point) rather than at (point).


(defun text-insert (text)
  "Inserts text starting at cursor point."
  (interactive)

  (message "[text-insert] p %d" (point))
  (insert text)
  (forward-line) )

(defun bifurc ()
  "Insert text at point"
  (interactive)

  (message "(line-beginning-position) (point) %d %d"
	   (line-beginning-position) (point))

  (setq-local d (- (point) (line-beginning-position)))
  (setq-local n (- 63 d))
  (setq-local m (- 69 d))
  (message "[bifurc] (m,n) %d %d %d" m n d)

  (setq-local s (make-string n ?\;))

  (text-insert s) )







> Sent: Sunday, May 09, 2021 at 6:02 AM
> From: "Emanuel Berg via Users list for the GNU Emacs text editor" <help-gnu-emacs@gnu.org>
> To: help-gnu-emacs@gnu.org
> Subject: Re: Inserting some text in a working buffer
>
> michael-franzese wrote:
>
> > (defun insert-text (text)
> >   "Inserts text frem beginning of line located at cursor point."
> >   (interactive)
> >   (with-current-buffer (buffer-name)
> >     (goto-char (point))
> >     (insert text)
> >     (next-line)) )
>
> Hahaha :)
>
> "(with-current-buffer (buffer-name)" - you are already in that
> buffer...
>
> and "(goto-char (point))" - you are already there!
>
> "(next-line)" - see the help, one should use `forward-line'...
>
> There is nothing in the code to do it "frem" beginning of line
> but you can use `beginning-of-line' for that...
>
> --
> underground experts united
> https://dataswamp.org/~incal
>
>
>

Re: Inserting some text in a working buffer

[Emanuel Berg via Users list for the GNU Emacs text editor]

michael-franzese wrote:

> Thank you Emanuel, glad you found the post amusing.
>
> Apart further into giggles, I would like to insert the text
> starting from the current point to column position 62.
> But with the following code, the text is bei= ng inserted
> before (point) rather than at (point).

(defun insert-char-to-col (char col)
  "Insert CHAR to COL."
  (interactive "cchar: \nncol: ")
  (let*((len (- col (current-column)))
        (str (make-string len char)) )
    (insert str) ))

-- 
underground experts united
https://dataswamp.org/~incal

Re: Inserting some text in a working buffer

[Eli Zaretskii]

> Date: Sun, 09 May 2021 06:11:21 +0200
> From:  Emanuel Berg via Users list for the GNU Emacs text editor <help-gnu-emacs@gnu.org>
> 
> (defun insert-char-to-col (char col)
>   "Insert CHAR to COL."
>   (interactive "cchar: \nncol: ")
>   (let*((len (- col (current-column)))
>         (str (make-string len char)) )
>     (insert str) ))

This seems to assume that each character takes just one column.  But
some characters, called "double-width characters", take 2 columns, not
1.  So using make-string here is not TRT, because its LENGTH argument
counts characters, not columns.