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bug#19102: 24.4; outline-move-subtree-up/down error at last and second-l
From: |
Paul Rankin |
Subject: |
bug#19102: 24.4; outline-move-subtree-up/down error at last and second-last subtree |
Date: |
Thu, 20 Nov 2014 23:43:10 +1000 |
Stephen Berman <stephen.berman@gmx.net> writes:
> This basically does the same thing as the patch I proposed -- adding a
> newline if necessary to ensure forward movement -- except that if there
> was no empty line after the last subtree, your code leaves the added
> newline dangling. If you add that bit then there is effectively no
> difference between your version and mine.
For my package's purposes I think it might be better to have that
dangling newline created it's not already there, but yeah, not for
outline-mode. (This may be a faux pas on my part.)
However, how about this for the dangling line code?
--8<---------------cut here---------------start------------->8---
(unless empty-last-line
(save-excursion
(goto-char (point-max))
(if (and (bolp) (eolp))
(delete-char -1)))))
--8<---------------cut here---------------end--------------->8---
That way it doesn't execute if it doesn't need to. Or am I over-thinking
it?
> However, yours is slightly shorter and slightly cleaner, since it
> avoids a couple of setq's of let-bound variables, so maybe it's the
> better fix (after adding the line deletion bit; also, it's not
> necessary and AFAIK stylistically discouraged to quote a lambda form;
> and finally, I'm not sure if open-line is more or less appropriate
> here than newline -- maybe both are too heavyweight and (insert "\n")
> or even (terpri) would suffice?
Awesome, thanks. I'm not proposing any of my code go into Emacs, so go
with whatever you think is best.
>> The only thing I'm not sure about is the line marked above. This is not
>> intended for Emacs, just wanna see if I'm on the right track :)
>
> The line you marked tests whether we're moving the subtree down
> (positive arg) and if so ensures we find the insertion point after it.
> Or are you asking about something else?
Thanks. Yes that was all, please do not be under any impression that I
have any idea what I'm doing.
I did find some problems with saving match data though, so just for the
heck of it, I've pasted the function I ended up going with for my
package (it probably looks like I rewrote things from your patch just to
be contrary, but it's just to fit with the internal style of the
package):
--8<---------------cut here---------------start------------->8---
(defun fountain-outline-shift-down (&optional n)
(interactive "p")
(outline-back-to-heading)
(let* ((move-func
(if (< 0 n)
'outline-get-next-sibling
'outline-get-last-sibling))
(end-point-func
(lambda ()
(outline-end-of-subtree)
(if (and (eobp)
(eolp)
(not (bolp)))
(insert-char ?\n))
(unless (eobp)
(forward-char 1))
(point)))
(beg (point))
(folded
(save-match-data
(outline-end-of-heading)
(outline-invisible-p)))
(end
(save-match-data
(funcall end-point-func)))
(insert-point (make-marker))
(i (abs n)))
(goto-char beg)
(while (< 0 i)
(or (funcall move-func)
(progn (goto-char beg)
(message "Cannot shift past higher level")))
(setq i (1- i)))
(if (< 0 n)
(funcall end-point-func))
(move-marker insert-point (point))
(insert (delete-and-extract-region beg end))
(goto-char insert-point)
(if folded
(hide-subtree))
(set-marker insert-point nil)))
--8<---------------cut here---------------end--------------->8---
--
Paul W. Rankin
http://www.paulwrankin.com
- bug#19102: 24.4; outline-move-subtree-up/down error at last and second-last subtree, (continued)
- bug#19102: 24.4; outline-move-subtree-up/down error at last and second-last subtree, Paul Rankin, 2014/11/21
- bug#19102: 24.4; outline-move-subtree-up/down error at last and second-last subtree, Stefan Monnier, 2014/11/22
- bug#19102: 24.4; outline-move-subtree-up/down error at last and second-last subtree, Eli Zaretskii, 2014/11/22
- bug#19102: 24.4; outline-move-subtree-up/down error at last and second-last subtree, Stephen Berman, 2014/11/22
- bug#19102: 24.4; outline-move-subtree-up/down error at last and second-last subtree, Stefan Monnier, 2014/11/23
- bug#19102: 24.4; outline-move-subtree-up/down error at last and second-last subtree, Stephen Berman, 2014/11/25
- bug#19102: 24.4; outline-move-subtree-up/down error at last and second-last subtree, Paul Rankin, 2014/11/25
- bug#19102: 24.4; outline-move-subtree-up/down error at last and second-last subtree, Stephen Berman, 2014/11/26
- bug#19102: 24.4; outline-move-subtree-up/down error at last and second-last subtree, Paul Rankin, 2014/11/20
- bug#19102: 24.4; outline-move-subtree-up/down error at last and second-last subtree, Stephen Berman, 2014/11/20
- bug#19102: 24.4; outline-move-subtree-up/down error at last and second-last subtree,
Paul Rankin <=
- bug#19102: 24.4; outline-move-subtree-up/down error at last and second-last subtree, Stephen Berman, 2014/11/21
- bug#19102: 24.4; outline-move-subtree-up/down error at last and second-last subtree, Stefan Monnier, 2014/11/25
- bug#19102: 24.4; outline-move-subtree-up/down error at last and second-last subtree, Stephen Berman, 2014/11/26
- bug#19102: 24.4; outline-move-subtree-up/down error at last and second-last subtree, Stefan Monnier, 2014/11/26
- bug#19102: 24.4; outline-move-subtree-up/down error at last and second-last subtree, Stephen Berman, 2014/11/26
- bug#19102: 24.4; outline-move-subtree-up/down error at last and second-last subtree, Stefan Monnier, 2014/11/26
- bug#19102: 24.4; outline-move-subtree-up/down error at last and second-last subtree, Stephen Berman, 2014/11/26
- bug#19102: 24.4; outline-move-subtree-up/down error at last and second-last subtree, Stefan Monnier, 2014/11/26
- bug#19102: 24.4; outline-move-subtree-up/down error at last and second-last subtree, Stephen Berman, 2014/11/27
- bug#19102: 24.4; outline-move-subtree-up/down error at last and second-last subtree, Stefan Monnier, 2014/11/27