TextKit2 Cursor position with zero width joiner and Kannada letter

Originator:parthakr
Number:rdar://FB9480360 Date Originated:08/09/2021
Status:Open Resolved:
Product:macOS Product Version:11 and 12
Classification:Core Text API Reproducible:Yes
 
In Kannada text combination

ರ, ZWJ, ್, any Kannada consonant, any Kannada vowel diacritics

With presence of ZWJ, cursor position is placed over ರ‍ to the left of the vowel diacritic, except when ರ and vowel diacritics is a precomposed glyph.

Example: Google Noto Sans Kannada

ಅರ‍್ಯಂಕ್ (ರ and vowel diacritics is a precomposed glyph)
ಅರ‍್ಯಾಂಕ್ (ರ and vowel diacritics is NOT a precomposed glyph)
ಅರ‍್ಯಿಂಕ್ (ರ and vowel diacritics is a precomposed glyph)
ಅರ‍್ಯೀಂಕ್ (ರ and vowel diacritics is a precomposed glyph)
ಅರ‍್ಯುಂಕ್ (ರ and vowel diacritics is NOT a precomposed glyph)
ಅರ‍್ಯೂಂಕ್ (ರ and vowel diacritics is NOT a precomposed glyph)
ಅರ‍್ಯೃಂಕ್ (ರ and vowel diacritics is a precomposed glyph)
ಅರ‍್ಯೄಂಕ್ (ರ and vowel diacritics is a precomposed glyph)
ಅರ‍್ಯೆಂಕ್ (ರ and vowel diacritics is a precomposed glyph)
ಅರ‍್ಯೇಂಕ್ (ರ and vowel diacritics is a precomposed glyph)
ಅರ‍್ಯೈಂಕ್ (ರ and vowel diacritics is a precomposed glyph)
ಅರ‍್ಯೊಂಕ್ (ರ and vowel diacritics is a precomposed glyph)
ಅರ‍್ಯೋಂಕ್ (ರ and vowel diacritics is a precomposed glyph)
ಅರ‍್ಯೌಂಕ್ (ರ and vowel diacritics is NOT a precomposed glyph)

Comments

Files

https://drive.google.com/file/d/1K2JkM6KtNJdlVb2ihheIp6CT541AHTKO/view?usp=sharing

or

https://we.tl/t-2W1BOi4QPu

By parthakr at Aug. 10, 2021, 6:20 p.m. (reply...)

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