From: "B. T. Raven" <btraven@nihilo.net>
To: help-gnu-emacs@gnu.org
Subject: interleaving text lines of two regions
Date: Fri, 27 Jan 2017 13:00:13 -0600 [thread overview]
Message-ID: <o6g5bq028sc@news4.newsguy.com> (raw)
Hello emacsworld:
I use the 'paste' filter to interleave lines of two text files (as for
example an original with a translation) but for shorter stretches of
text it seems like Emacs could do the same thing with an interactive
interleave-regions function. This would look something like ediff where
the user would select region-1 and region-2 and then have elisp take the
first line from one region and then insert the first line from the
second region, and so on, to produce a new buffer with interleaved text.
On the emacs wiki I found a 'yank-interleave function which probably has
most of the code needed for the proposed 'interleave-regions but I don't
quite understand it. In the *scratch* buffer I tested a mod of that
function with the final three gibberish lines below and got back a
faulty interleave as shown in the first lines:
;; This buffer is for notes you don't want to save, and for Lisp
evaluation.asneuthoaseutheoaunteohuouesntuho
aoeoasenthesnheosnthjoantheujoj
santoehoaesuntoahonteheesnthu
;; If you want to create a file, visit that file with C-x C-f,
;; then enter the text in that file's own buffer.
asneuthoaseutheoaunteohuouesntuho
aoeoasenthesnheosnthjoantheujoj
santoehoaesuntoahonteheesnthu
I modified the function by removing the "separator" argument like this:
(defun yank-interleaved () ;; original function called with argument
'separator'
"Yank the previous kill, interleaving each line of the yanked
text with a line in current buffer.
Interleaving begins on the line containing point, and moves
downward. If point is at the beginning of the line, the yanked
lines are inserted before the buffer lines. If it is at the end
of the line, the yanked lines are inserted after.
If the argument SEPARATOR is given, insert this between each
buffer line and yanked line."
;; TODO: Make it work with active region
;; (interactive "MSeparator: ")
(interactive)
(let ((yank (current-kill 1 t))
dir line)
(if (null (string-match-p "\n" yank))
(yank)
(setq dir
(cond
((bolp) 'front)
((eolp) 'back)
(t (user-error "Call with point at beginning or end of
line"))))
(setq yank (split-string yank "\n" t "\\s-"))
(while (setq line (pop yank))
(if (eq dir 'front)
(progn
(beginning-of-line)
(insert line)
;; (insert separator)
)
(end-of-line)
;; (insert separator)
(insert line))
(forward-line)))))
Of course what I wanted to see was:
;; This buffer is for notes you don't want to save, and for Lisp evaluation.
asneuthoaseutheoaunteohuouesntuho
;; If you want to create a file, visit that file with C-x C-f,
aoeoasenthesnheosnthjoantheujoj
;; then enter the text in that file's own buffer.
santoehoaesuntoahonteheesnthu
Can any of you help me to understand what's going on and whether my
proposed interleave-regions function would be worth pursuing for other
applications?
Thanks,
Ed
next reply other threads:[~2017-01-27 19:00 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-01-27 19:00 B. T. Raven [this message]
2017-01-27 19:51 ` interleaving text lines of two regions John Mastro
2017-01-27 20:01 ` John Mastro
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=o6g5bq028sc@news4.newsguy.com \
--to=btraven@nihilo.net \
--cc=help-gnu-emacs@gnu.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
Code repositories for project(s) associated with this external index
https://git.savannah.gnu.org/cgit/emacs.git
https://git.savannah.gnu.org/cgit/emacs/org-mode.git
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.