> Date: Wed, 18 May 2016 13:56:22 -0700 (MST)
> From: mhsekhavat <[email protected]>
>
> Eli Zaretskii wrote
> What is the real-life use case that requires this? What kind of text are we
> talking about?
>
> The two use cases are:
>
> 1) Manipulating serialized file formats such as:
>
> * A yaml file can have a list of strings each of which may be left-to-right
> or right-to-left. such as:
>
> full_names:
> - Carolyn Simon
> - Elijah Moreno
> - An Arabic Full Name Which Should Be Displayed right-to-left
> date : 2001-01-23
> * A SubRip subtitle file such as:
>
> 1
> 00:20:41,150 --> 00:20:45,109
> - English speaker: what is your name?
> - < An Arabic name which should be displayed right-to-left >
>
> 2
> 00:21:41,150 --> 00:22:45,109
> - Nice to meet you
In each of these examples, either there's no problem having the text
displayed in a L2R paragraph (it still gets reordered correctly), or
you can start the line with a RLM character to see better results in
some cases.
> 2) When writing a LaTeX text, you can split a paragraph into many lines. For
> example, if you want to write A
> Latin paragraph with an Arabic sentence in it , it is very common to write
> the Arabic sentence in a separated
> line:
>
>
> This is an Latin paragraph with some
> \begin{Arabic}
> بسم الله الرحمن الرحیم
> \end{Arabic}
> that is added.
> This will be rendered in a simple paragraph by LaTeX, and most editors like
> gedit, TexStudio, TexMaker,...
> display it correctly (all lines LTR direction but Arabic line in RTL
> direction). But emacs does not display the
> Arabic sentence in correct direction.
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. Once again, you can sometimes alleviate the problem by
using LRM and RLM characters.
> As I have previously mentioned, this behavior is a nice feature for emacs
> when editing regular text files, But I
> think it is necessary to be able to turn it off when manipulating a file
> format in which this feature is more like a
> bug, and inconsistency with most other standard editors.
Emacs currently doesn't support this. Patches are welcome.
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