MathJax Arabic Extension

This is an extension to MathJax (v2.5+), that provides basic Arabic support to MathJax.

The extension so far only supports TeX input with HTML-CSS output. However, support to other input and output jaxes is possible.

Key Features

It provides the following:

Flip the Equation and render it the Right-to-left (RTL) way!
Translate commonly used identifiers and functions.

How to Use the Extension

Install the Extension

First you'd like to install and configure MathJax in your page.

Then you'll need to include the arabic.js as an extension, here's an example configuration:

MathJax.Ajax.config.path["arabic"] = "https://cdn.rawgit.com/Edraak/arabic-mathjax/v1.0/dist";

MathJax.Hub.Config({
    extensions: [
        "[arabic]/arabic.js"
    ]
});

The Amiri Font

The extension relies (sort of) on the Amiri font to render beautifully (kinda).

One way to include the font is to add the following CSS from Google Fonts:

<link href='https://fonts.googleapis.com/css?family=Amiri' rel='stylesheet' type='text/css'>

Also you'd like to set the font as the undefined family. Because of a bug in MathJax, you should stick with a single font-family e.g. use Amiri or serif but not Amiri, serif.

MathJax.Hub.Config({
    'HTML-CSS': {
        undefinedFamily: 'Amiri'
    }
});

Typeset an Arabic Equation

The extension provides the following additional TeX commands to be typeset an Arabic equation:

\alwaysar

\alwaysar{EQUATION} A macro to translate and RTL'ize an EQUATION, where EQUATION can be anything from x = 1 to e^x=\lim_{n\to\infty}.

Wrap any TeX equation with it, and it should just work.
\ar

\ar{EQUATION} (Recommended) A similar macro to \alwaysar{EQUATION}, but it only translate and RTL'ize the equation if the page is Arabic.

Bellow is an example equation:
```
\ar{x=1}
```
The above would render x=1 beautifully in an English page, while it should render س=١ in an Arabic page even more beautifully ( in my opinion :) ).

Supported Features

Flip everything (almost) including:
- Parentheses (), braces {}, and brackets []
- Things that should be flipped like: Integration ∫, Root √ and Sigma Σ
Doesn't flip the things that should't be flipped, like the following letters: Theta Θ, Pi π, and Epsilon ε
Translate the basic math functions:
- \sin --> جا
- \cos --> تا
- \tan --> ظا
- \cot --> ظتا
- \sec --> قا
- \csc --> قتا
- \log --> لو
Translate \lim into نها, Although some would prefer غــا, but that's just a preference, may someone can patch it to support ar_IQ for the Iraqi people!
Render the Arabic numbers (١, ٢, ٣) instead of (1, 2, 3), which is awesome!
The following new commands:
- Circle radius: \radius Translates to r and نق
- Area of circle: (and other stuff) \Area Translates to A and م
- Arabic Zero: \zero Renders the صفرin Arabic while printing normal 0 in English. The former is usually preferred by the Arabic Math textbooks.
Bilingual commands, which prints the first argument on English pages and the second argument on Arabic pages. Useful to to build bilingual equations for strings that the extension provides no explicit support to. Note The first (English) argument is always a TeX input, while the second (Arabic) can be TeX, Text or TeX with Symbols, depending on the command you're using.
- Translate a TeX input \transx
- Translate a text input \transt e.g. \transt{\text{if}}{إذا} for the Math piecewise equations.
- Translate a TeX input with Arabic symbols \transs: e.g. \transs{A_b}{أ_ب}
Basic variable and function names translation:
- A --> أ
- B --> ب
- C --> حـ
- a --> ا
- b --> ب
- c --> حـ
- d --> د
- e --> هـ
- m --> م
- l --> ل
- n --> ن
- f --> ق
- g --> حـ
- h --> هـ
- k --> ك
- r --> ر
- t --> ت
- x --> س
- y --> ص
- z --> ع
Translation to other identifiers and operators like limits (\lim), sine, cosine and tan.
A very configurable translation utility to provide English/Arabic TeX commands (same command, with language-dependent output).
A configurable page language detection (defaults to the lang attribute of <html> tag).
It is generally configurable, but I haven't documented how to do it!

Experimental Stuff

Additional extensions for Physics and some Chemistry units and symbols exists, however, it is not tested/developed well. If you're curious, you can take a look at the following extensions:

phys1.js: Contains general physics units like Farad and speed of light. Interesting stuff, but haven't had proper testing and usage (yet).
phys2.js: Additional advanced physics units that I don't understand as much!
hacks.js: A hack to convert the English decimal mark from . to ٫ (Arabic decimal mark, Unicode 0x066b). Although the Arabic decimal mark exists, I'm not sure if it is common enough to include it in the main installation.

How to Contribute

Well, just issue a pull request to this repo and ping me (my GitHub username is @OmarIthawi). Even better, grab my docker-based development environment from here so you can have a better development experience:

$ git clone https://github.com/Edraak/arabic-mathjax.git
$ cd arabic-mathjax
$ git clone git@github.com:Edraak/MathJax-third-party-extensions.git extensions
$ git clone git@github.com:mathjax/MathJax mathjax
$ cd mathjax
$ git checkout 2.6.1
$ cd ..
$ git clone git@github.com:Edraak/arabic-extension-static.git static
$ make init
$ docker-compose up

License

The MIT License

Author

Omar Al-Ithawi i@omardo.com

A bit of a Background

Why this plugin exists? Well, I could tell you an interesting story like I wanted to change the world, but frankly we needed it to display Math equations for our Arabic learners at Edraak.org, and therefore I made it.

Well, it does change the world somehow, at the least in the eyes of our learners ^_^

dpvc/arabic-mathjax