On 03/07/09 21:05, J.A.J. Pater wrote:
> Bram Moolenaar wrote:
> > The display is not the only part. Suppose you move your cursor to the
> > start of a word and type "dw". You expect the word to be deleted.
> > Since "start of the word" depends on what direction the word is to be
> > read, the editor needs to understand the meaning of the word to be able
> > to decide what to do. And it gets worse: What if some of the characters
> > in the word are LTR and some are RTL? This quickly gets very
> > complicated.
> >
> > So Vim uses a simple and reliable method: Display the text either as LTR
> > or RTL and do the editing assuming all text is to be read that way.
>
> These are good reason for gvim to work the way its works!
> So this editing 'mode' should be default.
>
> But it still would be nice if there would be an optional 'real-bidi mode'.
>
> > It would be really messy to display the text with mixed directions and
> > then have all edits work one way or perhaps fail with an error.
>
> Using the ViGedit plugin for gedit I'm also able to do some real-bidi
> typing. :-)
> Works almost the same as "mlterm+vim+set termbidi"
> With an exception: in command mode the h always goes left, the l always
> goes right, just as I want it.
> (It just feels weird pressing h and cursor goes right).
Hm, I think it's one of those things one could get used to in time, no
harder than deleting with d rather than Ctrl-X, pasting with P rather
than Ctrl-V, and copying with y rather than Ctrl-C. I know there is
mswin.vim for the latter three, but IMO it is the result of a misguided
attempt to make Vim more like Notepad. Indeed, in true-bidi terminals
with 'termbidi' on (which should be the Vim default for mlterm) Vim has
no knowledge of character direction, so lllll goes uniformly
first-to-last, and hhhhh last-to-first, even if the movement is a little
jerky when meeting a direction change within a line of text. (Or did I
misunderstand? AFAICT I haven't got mlterm installed)
> Indeed as far as I'm concerned a command like "dw" in RTL mode should
> delete from R to L.
>
> Since gedit seems to be real-bidi I guess GTK+ has the algorithm
> mentioned by Ali sort of implemented.
> Guess this could be used in gvim.
My notion would be that a true-bidi gvim should work exactly like
vim+mlterm with 'termbidi'.
>
> Indeed it will be quite hard to figure out how vim commands should work.
> So maybe a 'real-bidi mode' could use only a subset of vim commands?
>
> Well just my 2 cents.
>
> Adriaan
Best regards,
Tony.
--
Meskimen's Law:
There's never time to do it right, but there's always time to
do it over.
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