Re: Bidirectional editing in Emacs -- main design decisions

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On Thu, May 19, 2016 at 9:16 AM, Eli Zaretskii <[email protected]> wrote:
>
>
> In each of these examples, either there's no problem having the text
> displayed in a L2R paragraph (it still gets reordered correctly),

No it doesn't. Believe me! Just an english word in a RTL line is enough to
become unreadable when it is displayed LTR.

>
> or you can start the line with a RLM character to see better results in
> some cases.
Of course you can handle it with RLM character even if your editor doesn't
support dynamic reordering at all. But we emacs users expect smart behavior=
.

> TeX file is not a simple text file (similar to HTML).  Supporting
> correct bidi reordering in such structured meta-text files is a
> feature that is missing. You cannot fix this by just setting paragraph
> direction.
I do not expect emacs to support correct bidi reordering based on structure
of a file. I just expect it to *be able to *have the same
=E2=80=8Bidea
as most of other editors
, about what a paragraph is=E2=80=8B. Although
=E2=80=8B=E2=80=8Bemacs is still
UAX#9
=E2=80=8B-compatible, but it is inconsistent with most of *other* *UAX#9-co=
mpatible*
editors. So the blame for inconsistency is on emacs.

> Emacs currently doesn't support this.
=E2=80=8B
Patches are welcome.
=E2=80=8BWould you please let me know which functions in which files are mo=
st
related how emacs =E2=80=8Bbidi dynamic reordering algorithm separates para=
graphs?

=E2=80=8BThanks in advance for your time Eli.=E2=80=8B

--=20
Sincerely,
Mohammad Hossein Sekhavat

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<div dir=3D"ltr">On Thu, May 19, 2016 at 9:16 AM, Eli Zaretskii &lt;<a href=
=3D"mailto:[email protected]">[email protected]</a>&gt; wrote:<br>&gt;<br>&gt;<br>&gt=
; In each of these examples, either there&#39;s no problem having the text<=
br>&gt; displayed in a L2R paragraph (it still gets reordered correctly),<b=
r><br>No it doesn&#39;t. Believe me! Just an english word in a RTL line is =
enough to become unreadable when it is displayed LTR.<br>=C2=A0<br>&gt;<br>=
&gt; or=C2=A0you can start the line with a RLM character to see better resu=
lts in<br>&gt; some cases.<br>Of course you can handle it with RLM characte=
r=C2=A0even if your editor doesn&#39;t support dynamic reordering at all. B=
ut we emacs users expect smart behavior.<div><br>&gt; TeX file is not a sim=
ple text file (similar to HTML).=C2=A0 Supporting<br>&gt; correct bidi reor=
dering in such structured meta-text files is a<br>&gt; feature that is miss=
ing. You cannot fix this by just setting paragraph<br>&gt; direction.</div>=
<div>I do not expect emacs to support correct bidi reordering based on stru=
cture of a file. I just expect it to <b>be able to </b>have the same=C2=A0<=
div class=3D"gmail_default" style=3D"font-family:tahoma,sans-serif;display:=
inline">=E2=80=8Bidea=C2=A0</div><span style=3D"font-family:tahoma,sans-ser=
if">as most of other editors</span><div class=3D"gmail_default" style=3D"fo=
nt-family:tahoma,sans-serif;display:inline">, about what a paragraph is=E2=
=80=8B. Although=C2=A0</div><span style=3D"font-size:12.8px"><div class=3D"=
gmail_default" style=3D"font-family:tahoma,sans-serif;display:inline">=E2=
=80=8B=E2=80=8Bemacs is still=C2=A0</div>UAX#9<div class=3D"gmail_default" =
style=3D"font-family:tahoma,sans-serif;display:inline">=E2=80=8B-compatible=
, but it is inconsistent with most of <b>other</b> <b>UAX#9-compatible</b> =
editors. So the blame for inconsistency is on emacs.</div></span></div><div=
><div class=3D"gmail_default" style=3D"font-family:tahoma,sans-serif"><br><=
/div></div><div>&gt; Emacs currently doesn&#39;t support this. =C2=A0<div c=
lass=3D"gmail_default" style=3D"font-family:tahoma,sans-serif;display:inlin=
e">=E2=80=8B</div>Patches are welcome.</div><div><div class=3D"gmail_defaul=
t" style=3D"font-family:tahoma,sans-serif">=E2=80=8BWould you please let me=
 know which functions in which files are most related how emacs =E2=80=8Bbi=
di dynamic reordering algorithm separates paragraphs?</div><div><br></div><=
div class=3D"gmail_default" style=3D"font-family:tahoma,sans-serif">=E2=80=
=8BThanks in advance for your time Eli.=E2=80=8B</div><br>-- <br>Sincerely,=
<br>Mohammad Hossein Sekhavat</div></div>

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