Replace move-text with drag-stuff

[duianto]

Just like: https://github.com/emacsfodder/move-text

https://github.com/rejeep/drag-stuff.el
also drags one or more (region) lines up or down.

But it also allows for dragging left and right (across end of lines):

• a word: changing place with the next or previous word.
• a region: moving it one character at a time to the left or right.

Added a new key binding: SPC x .
that opens the:

Drag Stuff Transient State
[k/K] up    [h/H] left   [q] quit
[j/J] down  [l/L] right

The move-text package isn't removed, even though it isn't used anymore in
Spacemacs.

Because the evil-unimpaired elpa directory is generated from the local
Spacemacs evil-unimpaired.el file.
https://github.com/syl20bnr/spacemacs/blob/develop/layers/%2Bspacemacs/spacemacs-evil/local/evil-unimpaired/evil-unimpaired.el

Therefore the evil-unimpaired key bindings [e and ]e still call the
move-text commands.

Until the evil-unimpaired elpa directory has been removed and regenerated by
restarting Spacemacs.

Then they will call the new drag-stuff commands.

I don't know if/when the move-text package can be removed in the future.

[lebensterben]

A question not directly related:
Is there any way to move the selection out of enclosing scope, e.g. {} () etc.?

For example suppose I have the following in a buffer:

(foo arg1 arg2
     (bar arg3
          (if arg4
              (baz)
            (xyz))))

And I have the if form selected, and the "drag-out" will transform it to

(foo arg1 arg2
     (if arg4
         (baz)
       (xyz))
     (bar arg3))

If invoked again, to

(if arg4
    (baz)
  (xyz))
(foo arg1 arg2
     (bar arg3))

[duianto]

move-text-up almost gets there, but the indentation isn't correct, and the line above the if block is moved to the end of the if blocks last line.

Before:

(foo arg1 arg2
     (bar arg3
          (if arg4
              (baz)
            (xyz))))

With the if block selected: M-x move-text-up or SPC x K (before this PR has been applied)

(foo arg1 arg2
(if arg4
              (baz)
            (xyz))     (bar arg3
          ))

move-text-up again.

(if arg4
              (baz)
            (xyz))(foo arg1 arg2
     (bar arg3
          ))

I haven't tried the it, but this package came up:
https://github.com/mrbig033/cool-moves
when searching for emacs drag sexp.

It has commands called: sexp-forward and sexp-backward

They might be able to move the if block correctly.

[smile13241324]

Looks good will be merged soon.

[duianto]

I'm not sure how I thought that the evil-unimpaired package gets updated.

But I see now that it's elpa directory: evil-unimpaired-20210314.80252
is generated from the local version:
layers/+spacemacs/spacemacs-evil/local/evil-unimpaired/evil-unimpaired.el

evil-unimpaired was updated automatically when checking for package updates.

Now move-text isn't used anywhere in Spacemacs.
I'll open a PR to remove it.