Bug 219735 – Implement ascent-override, descent-override, and line-gap-override

• Status: NEW
• Component: Text

[Tobi Reif]

It would be very useful if you could implement ascent-override, descent-override, and line-gap-override.

More info:

https://bugs.chromium.org/p/chromium/issues/detail?id=800693
(especially comments #20, #30 and #31)

https://tobireif.com/non_site_stuff/test_case_for_font_position_report_yet_another_font/

https://www.w3.org/TR/css-fonts-4/#font-metrics-override-desc

[Tobi Reif]

Chrome supports it (tested on MacOS vs Windows).

[Radar WebKit Bug Importer]

<rdar://problem/72419793>

[Tobi Reif]

Here's one reason why it's important to implement this feature:

https://tobireif.com/posts/ensuring_the_correct_vertical_position_of_large_text/

(And there's another reason listed in the post below "Another use case".)

[Tobi Reif]

Created attachment 420285 [details]
the general issue

Given that the issue can be as severe as in the attached screenshot, please consider assigning a high priority to implementing this feature.

[Tobi Reif]

Chrome and Edge support the properties, and they are currently getting implemented in Firefox:
https://bugzilla.mozilla.org/show_bug.cgi?id=1681691

I hope that they will get implemented in Safari soon.

[Tobi Reif]

Chrome, Edge, and Firefox support it.

Safari now is the only major browser which doesn't support this feature.

Please implement it soon.

[Rick]

+1 for Safari implementation!

[Fu liang]

+1 for Safari implementation!

[Roel Nieskens]

+1! Any news on when/if this will land?

[Jesse Bennett-Chamberlain]

+1 these properties (along with size-adjust) would be useful for any application that allows users to change their preferred typeface.

[Tim Nguyen (:ntim)]

*** Bug 229726 has been marked as a duplicate of this bug. ***

[Cesar]

+1 - Would like to see updates on this

[Tyler Sticka]

+1 Would love to see this happen!

[Gabrien Symons]

+1 to have in Safari!

+1 I'd love to see this 3 years old standard feature on every other browser engine (Blink/Geko supports it since 2021) becoming a standard in all browser engines.

Believe it or not the lack of support for this feature in safari is costing us thousands of dollars. @Tim Nguyen (:ntim) is there any way we could get this moved up in the team's queue?