bug#11860: 24.1; Arabic - Harakat (diacritics, short vowels) don't appear

[Kenichi Handa]

In article <83fw6nw66v.fsf@gnu.org>, Eli Zaretskii <eliz@gnu.org> writes:

> Yes, but wasn't this discussion about the effects of
> Ffont_shape_gstring on drawing the resulting glyphs?
> get_next_display_element has no bearing on that.

When a font driver returns GSTRING "abcdef", how to segment
it into clusters affect displaying especially in R2L text.
If "abcdef" is segmented as "ab", "cd", "ef", it is
displayed as "efcdab", but if it is segmented as "abc",
"def", it is displaed as "defabc".  In addition cursor
movement is also affected by how GSTRING is segmented.

---
Kenichi Handa
handa@gnu.org