172855 2017-06-02 06:54:02 -0700 REGRESSION(Safari 10): rendering issues with U+20D7 when separated from preceding character by span 2017-08-21 11:52:25 -0700 1 1 1 Unclassified WebKit Text Safari 10 Unspecified Unspecified REOPENED InRadar P2 Normal --- 1 peter webkit-unassigned ddkilzer mmaxfield webkit-bug-importer oldest_to_newest 1315034 0 peter 2017-06-02 06:54:02 -0700 When U+20D7 (and possibly other combining characters) is separated from the preceding character by a span element, the combination renders badly in Safari 10. In particular, Safari 10 renders this differently from other browsers (see [2]). Safari 10 also renders more test cases badly than Safari 9 did. On the other hand, WebKitGTK+ 2.16.3 has no issues. * minimal example [1] * screenshots (archive) [2] * original context [3] [1] https://codepen.io/pkra/pen/yXBRxW [2] https://github.com/mathjax/MathJax/files/1047779/cbt_2358181_2472234.zip [3] https://github.com/mathjax/MathJax/issues/1709#issuecomment-305648698 Thanks in advance. 1315133 1 mmaxfield 2017-06-02 11:39:01 -0700 This is a duplicate of https://bugs.webkit.org/show_bug.cgi?id=6148. *** This bug has been marked as a duplicate of bug 6148 *** 1315164 2 peter 2017-06-02 12:47:19 -0700 Thanks, Myles. I can see the connection but it seems this issue might be different enough since a) there's a regression in Safari 10 compared to 9 b) WebKitGTK+ 2.16.3 does not have a problem while #6148 is much older and marked as applying to WebKit in general. Thanks again, Peter. 1315174 3 mmaxfield 2017-06-02 12:57:28 -0700 Reopening due to regression 1315365 4 webkit-bug-importer 2017-06-02 21:00:10 -0700 <rdar://problem/32551196> 1337282 5 ddkilzer 2017-08-09 19:19:00 -0700 See also: <https://github.com/mathjax/MathJax/issues/1709#issuecomment-305795001> 1340670 6 318653 mmaxfield 2017-08-21 11:46:17 -0700 Created attachment 318653 Reproduction 1340675 7 mmaxfield 2017-08-21 11:52:25 -0700 Until we can do cross-element shaping, if you start an element with a combining mark, you're gonna have a bad time. https://bugs.webkit.org/show_bug.cgi?id=6148 will fix this. Between Safari 9 and Safari 10, I fixed some bugs about how we account for the initial advance. These fixes are progressions, and should not be reverted. The best bet for us to fix this problem is just to fix the root issue, and not try to figure out which progression caused this bug to occur. 318653 2017-08-21 11:46:17 -0700 2017-08-21 11:46:17 -0700 Reproduction repro.html text/html 747 mmaxfield PCFET0NUWVBFIGh0bWw+CjxodG1sPgo8aGVhZD4KPHN0eWxlPgovKiAgRnJvbSBodHRwczovL2dp dGh1Yi5jb20vbWF0aGpheC9NYXRoSmF4L2lzc3Vlcy8xNzA5I2lzc3VlY29tbWVudC0zMDU3NjE3 MzM6ICJsb2FkIGEgZm9udCBrbm93biB0byBoYXZlIHRoZSB2ZWN0b3IgYXJyb3cuIFsuLi5dICBt b3JlIGltcG9ydGFudGx5LCBpdCB3b3VsZCBtYWtlIHN1cmUgeW91IGFyZSBnZXR0aW5nIGEgZm9u dCB0aGF0IHVzZXMgdGhlIHplcm8td2lkdGggY2hhcmFjdGVyIGFwcHJvYWNoIGZvciB0aGUgYWNj ZW50cy4iICAqLwpAZm9udC1mYWNlIHsKICBmb250LWZhbWlseTogVkVDOwogIHNyYzogdXJsKE1h dGhKYXhfTWFpbi1SZWd1bGFyLm90ZikgZm9ybWF0KCJvcGVudHlwZSIpCn0KPC9zdHlsZT4KPC9o ZWFkPgo8Ym9keT4KPGgxPlNhbXBsZTwvaDE+Cgo8ZGl2IHN0eWxlPSJmb250LWZhbWlseTpWRUMi Pgp1JiN4MjBENzsKPHNwYW4+dTwvc3Bhbj4mI3gyMEQ3Owp1PHNwYW4+JiN4MjBENzs8L3NwYW4+ CjxzcGFuPnU8L3NwYW4+PHNwYW4+JiN4MjBENzs8L3NwYW4+CjwvZGl2PgoKPGgyPkNvbnRleHQ8 L2gyPgo8YSBocmVmPSJodHRwczovL2dpdGh1Yi5jb20vbWF0aGpheC9NYXRoSmF4L2lzc3Vlcy8x NzA5I2lzc3VlY29tbWVudC0zMDU2NDg2OTgiPk1hdGhKYXgjMTcwOTwvYT4gKHlvdSBjYW4gZmlu ZCBjcm9zcy1icm93c2VyIHNjcmVlZW5zaG90cyB0aGVyZSkuCjwvZm9vdGVyPgo8L2JvZHk+Cjwv aHRtbD4K