Alexei Alexandrov schrieb:
> Hi,
>
> I'd like to request a feature in Vim which would be useful not very often but
> is very important I think.
>
> Usually I don't lose information in Vim. You can undo things, you can restore
> the file from a backup etc. There is only one situation which led me to
> information loss several times. This situation happens when I have a file
> with
> modifications opened in Vim and then I also change this file by accident
> outside of Vim. In this case Vim shows a message box with 2 buttons: reload
> file or don't reload file. Several times I pressed "reload file" by accident.
> And my changes in Vim were lost! Undo didn't work after that.
>
> I don't know if it's difficult to implement but it would be great if undo
> worked after such reload. And this would be useful not only for "by accident"
> cases - I could also press "reload" just to see what those external changes
> are
> and then undo if I don't need them.
>
> P.S. Persistent undo would be great too. :)
You can try a workaround with
:h DiffOrig
:h FileChangedShell
au FileChangedShell * call DiffSync()
func! DiffSync()
" :DiffOrig
vert new
set buftype=nofile
read #
0delete _
diffthis
wincmd p
diffthis
wincmd p
%diffput
close
diffoff
endfunc
Diffing against the changed file on disk adds the changes to the undo
history.
When writing the file you'll get a
WARNING: The file has been changed since reading it!!!
of course -- the function does not reload the file.
As :h FileChangedShell states:
| NOTE: The commands must not change the current
| buffer, jump to another buffer or delete a
| buffer. *E246*
Trying the function I didn't get any errors though.
--
Andy
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