Apple core text engine has issues with Kannada words with double/triple/multiple u+0ccd (ZERO WIDTH JOINER)

• Component: Text
• Status: RESOLVED FIXED

[P K]

Created attachment 304116 [details]
Attached screenshot, left Chrome, middle Firefox, Right Safari

Apple core text engine has issues with Kannada words with double/triple/multiple u+0ccd (ZERO WIDTH JOINER), meaning base letter ending with u+0ccd and one or many half-forms with it forced by multiple u+0ccd.

Open the below weblinks in SAFARI on mac, and chrome on mac to see the difference.

search word ದಟ್ಸ್
in below link which uses Tunga Webfont:
http://kannada.oneindia.com/amphtml/news/2009/04/19/karnataka-muslim-sangharsha-samiti-to-support-bjp.html

Search words in
ಎಕ್ಸ್ , ಮಾರ್ಚ್, ಟೆಕ್ಸ್ಟ್, ಬುಕ್ಸ್, ಸಾಫ್ಟ್, ಜಸ್ಟ್
in below link which uses Tunga Webfont:
http://kannada.oneindia.com/news/bangalore/e-kannada-exhibition-conversation-kannada-online-expo-ravindra-kalakshetra-114263.html

Steps to Reproduce:
Open the below weblinks in SAFARI on mac, and chrome on mac to see the difference.

search word ದಟ್ಸ್
in below link which uses Tunga Webfont:
http://kannada.oneindia.com/amphtml/news/2009/04/19/karnataka-muslim-sangharsha-samiti-to-support-bjp.html

Search words in
ಎಕ್ಸ್ , ಮಾರ್ಚ್, ಟೆಕ್ಸ್ಟ್, ಬುಕ್ಸ್, ಸಾಫ್ಟ್, ಜಸ್ಟ್
in below link which uses Tunga Webfont:
http://kannada.oneindia.com/news/bangalore/e-kannada-exhibition-conversation-kannada-online-expo-ravindra-kalakshetra-114263.html

[Alexey Proskuryakov]

> search word ದಟ್ಸ್
> in below link which uses Tunga Webfont:
> http://kannada.oneindia.com/amphtml/news/2009/04/19/karnataka-muslim-sangharsha-samiti-to-support-bjp.html

This looks correct to me in Safari 10.0.3 on macOS 10.12.3

> Search words in
> ಎಕ್ಸ್ , ಮಾರ್ಚ್, ಟೆಕ್ಸ್ಟ್, ಬುಕ್ಸ್, ಸಾಫ್ಟ್, ಜಸ್ಟ್
> in below link which uses Tunga Webfont:
> http://kannada.oneindia.com/news/bangalore/e-kannada-exhibition-conversation-kannada-online-expo-ravindra-kalakshetra-114263.html

But this reproduces.

[P K]

Created attachment 304152 [details]
Issue reproduced for ದಟ್ಸ್ in mac 10.12.3 and Safari 10.0.3

Issue reproduced for ದಟ್ಸ್ in mac 10.12.3 and Safari 10.0.3, screenshot attached.

[P K]

Created attachment 304157 [details]
Issue reproduced in iPhone

[Myles C. Maxfield]

I think I fixed this in http://trac.webkit.org/changeset/211382 . Can you try using a WebKit Nightly build from https://webkit.org/nightly/ ? Thanks!

[P K]

The error still persists even with nightly build. 

Please check.

Please fix this in Coretext also, so this issue is resolved system wide for mac OS and iOS.

[P K]

FYI. This issue is system mac OS and iOS.

[Myles C. Maxfield]

I can reproduce this on http://kannada.oneindia.com/news/bangalore/e-kannada-exhibition-conversation-kannada-online-expo-ravindra-kalakshetra-114263.html

[Radar WebKit Bug Importer]

<rdar://problem/31542524>

[P K]

This is resolved in mac OS high Sierra and iOS 11