2060241 - Ligatures get sliced by line breaking

Status: RESOLVED DUPLICATE of bug 479829

(Core :: Layout: Text and Fonts, defect)

Description

[psychpsyo]

Attachment: oof, ouch, my ligature!

User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:153.0) Gecko/20100101 Firefox/153.0

Steps to reproduce:

I made a line-break happen in the middle of a ligature. I did this by making Firefox hyphenate the word "office", in a font with an ffi ligature:

<!DOCTYPE html>
<html lang="en">
<style>
body {
hyphens: auto;
}
</style>
This is the word "office"
</html>

Actual results:

The ffi ligature got sliced in half, and the tip of the second f was pulled onto the second line, disconnected from the rest of the f.

Expected results:

Line-breaking in a middle of a ligature should either be avoided entirely, or it should disband the ligature. (potentially splitting it into smaller ligatures, like ffi -> f, fi, where both ffi and fi are ligatures)

Comment 1

[BugBot [:suhaib / :marco]]

The Bugbug bot thinks this bug should belong to the 'Core::Layout: Text and Fonts' component, but is not confident enough to move the bug to that component.