f8c631ed24
Fixes #16120. `unicode-bidi: plaintext` makes browser auto-detect base bidi direction according to bidi algorithm heuristics, on each line separately. https://drafts.csswg.org/css-writing-modes/#bidi-algo AFAICT this matches both Android and Desktop behaviors, and is the friendly behavior for mixed-direction users. Purely LTR users should not be affected — the heuristics return LTR even on "neutral" lines that contain no letters, only punctuation/emojis/digits. (http://www.unicode.org/reports/tr9/#P2 — rule P3 defaults to level 0, which is LTR.) Whereas all RTL language users in practice need to deal with mixed-direction texts, and the ability to split lines to prevent LTR/RTL mixups is extremely handy... The `text-align: start` ensures LTR-detected lines are displayed left-aligned, and RTL-detected lines right-aligned. Which again matches both Android and Desktop behaviors. This is redundant — it seems already the default with current CSS — but is important for mixed-language users, so I wanted to ensure it in case somebody sets alignment on bigger parts of the document in the future. |
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