Unicode Utilities: BIDI (UBA) (original) (raw)

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Shows processing by the UBA (Unicode Bidi Algorithm), which is used to display all Unicode Arabic and Hebrew text. For more information, see bidi info.

This Java implementation supports UBA rules and character properties as ofUnicode 6.2. To test current UBA rules, or intermediate versions fromUnicode 6.3 forward, see the C Reference demo.

Sample

Paragraph Direction ASCII Hack?

Paragraph 1

Base Level 0 = LTR heuristic

Source

Memory Position 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
Character m a r k 3 . 1 % ‎م‎ ‎ا‎ ‎ر‎ ْ ‎ك‎ 2 . 0 .
Bidi Class L L L L WS EN CS EN ET WS AL AL AL NSM AL WS EN CS EN CS
Rules Applied N1→L W7→L W4→ENW7→L W7→L W5→ENW7→L N2→L W3→R W3→R W3→R W1→ALW3→R W3→R N1→R W2→AN W4→AN W2→AN W6→ONN2→L
Resulting Level L0 L0 L0 L0 L0 L0 L0 L0 L0 L0 L1 L1 L1 L1 L1 L1 L2 L2 L2 L0

Reordered

Display Position 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
Memory Position 0 1 2 3 4 5 6 7 8 9 16 17 18 15 14 13 12 11 10 19
Character m a r k 3 . 1 % 2 . 0 ‎ك‎ ْ ‎ر‎ ‎ا‎ ‎م‎ .

Fonts and Display. If you don't have a good set of Unicode fonts (and modern browser), you may not be able to read some of the characters. Some suggested fonts that you can add for coverage are:Noto Fonts site,Unicode Fonts for Ancient Scripts,Large, multi-script Unicode fonts. See also: Unicode Display Problems.

Version 3.9; ICU version: 74.1; Unicode/Emoji version: 15.1.0;