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

From: Andreas Politz
Subject: Re: Writing a function for a indented copy of a region
Date: Thu, 18 Dec 2008 16:05:17 +0100
User-agent: Mozilla-Thunderbird (X11/20081018)

Decebal wrote:
On 17 dec, 14:31, Decebal <address@hidden> 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 have made a better (and more generally) again.

The function indented-yank is a specialised version of my-headed-yank,
so I wrote that one also. ;-}
I also needed a function to remove a region without putting it in the
kill-ring, so I also made the function my-remove-region.
I made key-combinations for al the three functions.
Are there standards for naming functions and asigning functions to key

It is mentioned somewhere in the info files, that C-c <char> is/should be
reserved for the user. C-c C-<char> is often used by major-modes,
whose keymap will potentially shadow your global-map .

The code:
    (defun my-remove-region(begin end)
      "Delete region without putting it in the kill-ring"
      (interactive "r")
      (kill-region begin end)
      (pop kill-ring)
Have a look at `delete-region'.

    (global-set-key (kbd "C-c C-r") 'my-remove-region)

    (defun my-headed-yank(head begin end do-kill)
      "Put region with 'head' prepended to every line in the kill-
      (interactive "sHead: \nr\nnKill Region? ")
      (kill-new (replace-regexp-in-string
                 (buffer-substring begin end)
      (if do-kill
          (my-remove-region begin end)
    (global-set-key (kbd "C-c C-h") 'my-headed-yank)

    (defun my-indented-yank(indent begin end)
      "Put indented region in the kill-ring"
      (interactive "p\nr")
      (setq indent (cond ((eq indent 0) 1)
                         ((eq indent 1) 4)
                         (t indent)
      (let ((do-kill) (head))
        (if (< indent 0)
            (setq indent  (- 0 indent)
                  do-kill t
        (setq head
              (format (format "%%%ds" indent) "")
        (my-headed-yank head begin end do-kill)
    (global-set-key (kbd "C-c C-w") 'my-indented-yank)

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