Your description of the interaction of invisible with bidi seems right
to me, but I was surprised by your response to this
> I think a reasonable model is to display the text as if the invisible
> characters are not there.
I think the resulting change of the visual order will surprise the
users. It also complicates implementation, which for me is an
important downside.
because I don't see a differnce between "display the text as if the
invisible characters are not there" and what you described (in the
no-ellipsis case). What you described
One consequence is that a run of invisible characters can now be split
into several non-contiguous runs. For example, this text:
abcABCxyz
with c and A covered by an invisible property will be displayed as
abCBxyz
seems to agree entirely with that description. Is there something I
have misunderstood?
However, the invisible characters do have some effect when they
generate an ellipsis. In that case, multiple ellipses as you've
described seems right.
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