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[Egmont Koblinger <egmont@xxxxxxxxx>]

A few other issues:

In implicit BiDi mode, how should BiDi control characters
(LRE/RLE/LRO/RLO/PDF; LRM/RLM) be handled? We need to remember them.
Which cell should they belong to? How to later override the displayed
string to remove any of these, or insert new ones?

In explicit BiDi mode, copy-pasting would reverse the strings.

Some people prefer their text editor not to switch to the alternate
screen, so that e.g. upon exiting the contents of the file is still
visible. However, exiting would switch off the explicit mode. Would
there be one global flag for the terminal to state the BiDi mode: then
the screen (showing a part of the file) be repainted with incorrect
BiDi? Or would this flag be remembered for each character cell?

Also note that Arabic font rendering on fixed width grid is another
quite troublesome issue.

I'm pretty sure that many other bugs would arise upon implementing a
proof of concept.

I guess I'd second Diego's "TL.DR." conclusion.

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(325324).
https://bugs.launchpad.net/bugs/263822

Title:
  RTL (right to left) support in terminal (BiDi)

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