193002 2018-12-21 19:54:31 -0800 Unprefix -webkit-hyphens 2023-07-05 04:01:29 -0700 1 1 1 Unclassified WebKit Text WebKit Nightly Build Unspecified Unspecified RESOLVED DUPLICATE 243670 InRadar P2 Normal --- 193003 217522 1 mmaxfield webkit-unassigned bfulgham graouts ishida kai.hollberg mmaxfield sierkb the.bull webkit-bug-importer oldest_to_newest 1490601 0 mmaxfield 2018-12-21 19:54:31 -0800 There are 2 things stopping us: 1) CSS-Text-3 says "The UA must therefore only automatically hyphenate text for which the content language is known and for which it has an appropriate hyphenation resource." Currently, if the content isn't language-tagged, we'll use the system's locale, contrary to the spec 2) CSS-Text-3 says: "When shaping scripts such as Arabic are allowed to break within words due to hyphenation, the characters must still be shaped as if the word were not broken " We shape text as if the hyphen is the end of the line, meaning the last glyph gets put into its final form, rather than its medial form. Instead, we should shape the entire word, and chop the shaped word in the middle. 1820795 1 webkit-bug-importer 2021-12-06 15:56:31 -0800 <rdar://problem/86128104> 1822065 2 ishida 2021-12-09 03:56:05 -0800 Fwiw, Arabic language text doesn't normally hyphenate at all. If the Arabic script is used to write Uighur language text, however, hyphenation is used, and the shaping is needed. Note also that the 'hyphen' itself looks like and probably is U+0640 ARABIC TATWEEL, separated from the preceding characters by a small space. For examples, see https://r12a.github.io/scripts/arabic/images_ug/large/shanjak_kizti_may11_2002_lr.jpg 1822067 3 ishida 2021-12-09 04:01:11 -0800 Is using the system locale something you want to change in the spec, or do you want to conform to the current spec? It seems to me that using the system locale could be problematic if someone who normally works in a language such as Uighur (or numerous others that use special characters or placement of 'hyphens', or no hyphenation, like Arabic) opens a page in English that doesn't have the language information set. They'll see some odd effects where the English text is hyphenated. 1822203 4 mmaxfield 2021-12-09 11:02:41 -0800 Re:system locale - I don’t have sufficient evidence that the spec should change. We had concerns about web compat, because lots of web content is not language tagged (so this change would break that content), but I believe all other browsers follow the spec. We should at least try to change WebKit to match the spec and see if it causes breakage. 1849287 5 graouts 2022-03-08 08:47:11 -0800 Ideally this would add animation support for this property in CSSPropertyAnimation. See the many uses of DiscretePropertyWrapper, this will likely be a one-liner. 1965095 6 gsnedders 2023-07-05 04:01:29 -0700 *** This bug has been marked as a duplicate of bug 243670 ***