Justification for Arabic
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- Dominant language
- Rust
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Description
Justification of Arabic text is very unique. Usually, they do not add whitespace between words. Instead, Arabic text is justified using two ways:
- Using more "compressed" or "stretchy" variant glyphs. OT have a tag called
jaltto provide these alternatives. - Stretching the words by inserting Tatweel between letters.
Example of justified Arabic text from ref. Blue shows the swash Kaf, purple is used for the final elongated Alif, orange marks the Returning Yeh (Bari-Ye), and yellow highlights the use of Tatweels inserted.
Exmaple of Tatweel insertion:
Ref:
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
No implementation files or tests are named. Start by locating the text layout and shaping entry points, then review the linked OpenType jalt and Tatweel references alongside the examples. Done should mean Arabic justification follows a clearly agreed strategy for alternative glyphs or Tatweel insertion, with tests covering the resulting layout.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- rust
- Domain
- internationalization
- Issue type
- Feature
- Difficulty
- 5/5
- Estimated time
- Over a week
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 35/100