Re: Writing a function for a indented copy of a region

[Decebal <CLDWesterhof@gmail.com>]

On 17 dec, 20:47, Andreas Politz <poli...@fh-trier.de> wrote:
> Decebal wrote:
> > On 17 dec, 14:31, Decebal <CLDWester...@gmail.com> wrote:
> >> A lot of times I need to copy a part of a (log) file for an e-mail. I
> >> like to indent this (default with four spaces). At this moment I do
> >> this by hand. But I would like to do this with a function.
> >> What I would like this function to do is take the part that is
> >> selected, indent this with (default) four spaces, put the indented
> >> region in the kill-ring and undo the indent. Has anyone a pointer
> >> about how to code this?
>
> > I found a way. In my .emacs I put:
> > (defun my-indented-yank(indent)
> >   "Put indented region in the kill-ring"
> >   (interactive "p")
> >   (setq indent (cond ((eq indent 0) 1)
> >                      ((eq indent 1) 4)
> >                      (t indent)
> >                )
> >   )
> >   (indent-rigidly (region-beginning) (region-end) indent)
> >   (copy-region-as-kill (region-beginning) (region-end))
> >   (undo)
> > )
>
> > It looks like this satifies my demands. ;-}
> > In this way the default indent is 4. If I need an indent of one I can
> > use 'C-u 0'.
>
> > The only thing is that the 'GNU Emacs Lisp Reference Manual' says that
> > I should not use 'copy-region-as-kill'. I should use 'kill-new' or
> > 'kill-append'. But those do not work with a region. What am I missing?
>
> Why not work with a string, instead of messing with your buffers undo history.
>
> (defun kill-save-indent-region (indent start end)
>    (interactive "p\nr")
>    (kill-new (replace-regexp-in-string
>              "^"                      ;or "^\\s-*"
>              (format (format "%%%ds" (case indent
>                                        (0 1)
>                                        (1 4)
>                                        (t indent)))
>                      "")
>              (buffer-substring start end)))
>    (deactivate-mark))
>
> -ap

I have just started with programming in elisp. ;-}
So I still need to learn a lot.  I'll try to understand your code.