Bug 195745 – Letter spacing shouldn't break Arabic words

• Status: REOPENED
• Component: CSS

[Ebrahim Byagowi]

Testcase:
data:text/html;charset=utf8,<div style="letter-spacing: 10px;">%D9%85%D8%AA%D9%86</div>

Actual:
Breaks the word letter on Arabic

Expected:
Shouldn't insert space between on an Arabic word per https://drafts.csswg.org/css-text-3/#cursive-tracking

Equivalent bugs to get context:
https://crbug.com/942012
https://bugzilla.mozilla.org/show_bug.cgi?id=1342835

[Brent Fulgham]

We seem to exactly match Chrome behavior here. Can you reopen if we are still doing something wrong in macOS 13 or iOS 16?

[Radar WebKit Bug Importer]

<rdar://problem/96318423>

[yisibl]

Chrome now has a new behavior:
https://groups.google.com/a/chromium.org/g/blink-dev/c/K_tGT0tTJoM/m/QwZrhu7ADgAJ

[Ebrahim Byagowi]

> Can you reopen if we are still doing something wrong in macOS 13 or iOS 16?


Thanks for asking and sorry for missing to update this issue. This is never fixed indeed, I'm using Tahoe 26.0 Beta (25A5346a ) right now and it still exists.

data:text/html;charset=utf8,<div style="letter-spacing: 40px; font-size: 740%">%D9%85%D8%AA%D9%86</div>

https://imgur.com/a/2oSkxPX

The text on the screenshot shouldn't be broken in two parts.

> Chrome now has a new behavior:

Thanks for pointing that out, they've fixed the equivalent of this file on Chrome which I've filed there, just am mentioning so that WebKit can become confident this is a change that should happen per the spec and now for compatibility with most other browsers.

[Ebrahim Byagowi]

Just to note a possible fix in the future shouldn't be like Firefox https://bugzilla.mozilla.org/show_bug.cgi?id=2079008 and https://issues.chromium.org/570417348

[Ebrahim Byagowi]

So to clarify this a bit, this bug is already fixed in Chromium https://crbug.com/942012 and Firefox https://bugzilla.mozilla.org/show_bug.cgi?id=1342835 but the problem is they've caused a regression on https://bugzilla.mozilla.org/show_bug.cgi?id=2079008 and https://issues.chromium.org/570417348