Apple CoreText two engines

[MayuraVerma]

@brawer Hello Sascha,

There seems two modes or type of Text engine in MacOS and iOS.

1. Notes app, Twitter -new tweet window, youtube comment window
2. Pages, emails, twitter- view tweet, youtube-comment view

First type has a lot of issues. How to test them separately?

Why is the difference?

I can give some sample text and show the difference, if it helps understanding this better.

[MayuraVerma]

@brawer
is it because of difference between NSTextView and NSTextField?

[MayuraVerma]

Hello @brawer

Could you please help create a test for this?

[brawer]

I have no idea if/why CoreText would behave differently in different apps. If you can reproduce, consider filing a bug with Apple. If you tell me which specific CoreText APIs to call, I can change the test suite, or (preferred by me) just send a pull request via GitHub.

[MayuraVerma]

This happens in notes app and browser while typing.

when text is not in edit mode in browser, text is rendering correctly.
My guess, its something to do with nstextfield vs nstextview

Could we reproduce this issue in this test?

here are text
ಅಕ್ಟ್ಬೋಬರ್
ಅಕ್ಟ್ರೋಬರ್‌
ಅರ್ಕ್ಟ್ರೋಬರ್
ಅರ್ಕ್ಟೋಬರ್

also
ಕನ್ನಡೊ
if it is at the beginning of the notes and no other text.

[brawer]

Which CoreText API would need to be called exactly? (For the test suite, we need positioned glyph vectors which can be converted to outlines). The current code calls the regular CoreText and CoreGraphics APIs. If you know of another API that should be called, feel free to send a patch via GitHub.