On Oct 27, 2011, at 2:38 AM, Keshav Kini wrote:
> Would it be possible to configure emacs to pretend there is space there, or
> something like that? I imagine it should be easy to add something to ~/.emacs
> which upon loading a .py or .pyx file searches for blocks of empty lines,
> checks previous and following lines' indentation, and if it's the same both
> above and below, apply the same indentation to all the empty lines in
> between. Then another hook would, upon save-to-disk, just delete all trailing
> whitespace again. This would transparently make the cursor movement nicer
> within the open buffer for people who like it that way. Jason, what do you
> think? (I CC'd Jason).
That's kind of a silly question. Of course it's possible, that's why it's
emacs. ;-)
I was playing around with something like this yesterday. The following advice
for next-line (and the same for previous-line) gets at least part of the way
there, but I found I don't really like it personally.
(defadvice next-line (around empty-line-fix
(&optional arg try-vscroll)
activate)
(let ((goal (or goal-column
(if (< (current-column) (current-indentation))
(current-column)
(current-indentation)))))
;; Delete trailing whitespace from the current line before moving
(delete-trailing-whitespace (line-beginning-position)
(line-end-position))
;; Move the lines
ad-do-it
;; Insert spaces as needed
(when (and (> (- goal (current-column)) 0)
(not (string-match "\\S "
(buffer-substring-no-properties
(line-beginning-position)
(line-end-position)))))
(insert-char ?\ (- goal (current-column))))))
-Ivan
--
To post to this group, send an email to sage-devel@googlegroups.com
To unsubscribe from this group, send an email to
sage-devel+unsubscr...@googlegroups.com
For more options, visit this group at http://groups.google.com/group/sage-devel
URL: http://www.sagemath.org
