Proposal for BiDi in terminal emulators

Richard Wordingham via Unicode unicode at
Fri Feb 1 12:57:43 CST 2019

On Fri, 1 Feb 2019 13:02:45 +0200
Khaled Hosny via Unicode <unicode at> wrote:

> On Thu, Jan 31, 2019 at 11:17:19PM +0000, Richard Wordingham via
> Unicode wrote:
> > On Thu, 31 Jan 2019 12:46:48 +0100
> > Egmont Koblinger <egmont at> wrote:
> > 
> > No.  How many cells do CJK ideographs occupy?  We've had a strong
> > hint that a medial BEH should occupy one cell, while an isolated
> > BEH should occupy two.  
> Monospaced Arabic fonts (there are not that many of them) are designed
> so that all forms occupy just one cell (most even including the
> mandatory lam-alef ligatures), unlike CJK fonts.
> I can imagine the terminal restricting itself to monspaced fonts,
> disable “liga” feature just in case, and expect the font to well
> behave. Any other magic is likely to fail.

Of course, strictly speaking, a monospaced font cannot support harakat
as Egmont has proposed.


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