67583 2011-09-04 20:55:04 -0700 Make overflowchanged event asynchronous 2024-12-15 07:00:55 -0800 1 1 1 Unclassified WebKit UI Events 528+ (Nightly build) Unspecified Unspecified RESOLVED WONTFIX https://bugs.webkit.org/show_bug.cgi?id=218402 P2 Normal --- 1 dglazkov dglazkov ahmad.saleem792 andersca ap bdakin bfulgham darin mitz rniwa simon.fraser syoichi thorton oldest_to_newest 462012 0 dglazkov 2011-09-04 20:55:04 -0700 It looks like this is a non-standard event that is the only thing that's keeping us from ditching a fairly massive chunk of FrameAction/FrameActionSchedule machinery. And it's the only thing left that can still go bump in the middle of the night. What I mean by this is it's the only event handler that could still fire while querying properties that cause forced style recalc + layout. Perhaps we could just remove it altogether? Anders, you added it back in http://trac.webkit.org/changeset/15191. Do you remember why we need it? 462269 1 106362 dglazkov 2011-09-05 15:07:58 -0700 Created attachment 106362 Patch 462599 2 andersca 2011-09-06 09:39:35 -0700 It was added to support a feature in Mail.app. I'll e-mail someone and check if it's still used. 475567 3 andersca 2011-09-29 11:58:43 -0700 It is still used, but it can definitely be made asynchronous! 475594 4 dglazkov 2011-09-29 12:25:10 -0700 (In reply to comment #3) > It is still used, but it can definitely be made asynchronous! Yay!! I thereby humbly request your review, kind sir. 485408 5 mitz 2011-10-17 12:51:18 -0700 This seems like a very risky change. Making scroll events asynchronous has irreparably broken apps and websites, even though it had already been asynchronous in other engines, so people assumed that content was not depending on the synchronous nature. overflowchange, however, originated in WebKit, where it had always fired synchronously, so all apps and web content using it expect it to be synchronous. 485538 6 andersca 2011-10-17 15:00:49 -0700 (In reply to comment #5) > This seems like a very risky change. Making scroll events asynchronous has irreparably broken apps and websites, even though it had already been asynchronous in other engines, so people assumed that content was not depending on the synchronous nature. overflowchange, however, originated in WebKit, where it had always fired synchronously, so all apps and web content using it expect it to be synchronous. There is only one known client that uses this event, and I've verified that this patch doesn't break the client. 811032 7 dglazkov 2013-01-18 14:14:52 -0800 Eric's reminder of r+'d patches led me back to this patch. Darin, Anders, Dan -- are we doing this or not? Let me know. I'll rebase/commit or just wontfix the bug. 1902104 8 ahmad.saleem792 2022-09-29 11:09:02 -0700 It seems that this r+ patch didn't landed in Webkit (checked with Bug ID in Webkit GitHub). Is it still applicable? Thanks! 1902383 9 darin 2022-09-30 09:55:13 -0700 I don’t know, but think instead we should investigate removing the overflowchanged event. 1902384 10 darin 2022-09-30 09:57:35 -0700 I believe the only client using this was macOS Mail, and if I am not mistaken it’s no longer used in the new version coming in macOS Ventura. And the TOT WebKit does not need to be compatible with older versions of macOS Mail. 1902385 11 darin 2022-09-30 09:58:05 -0700 Another alternative that would be helpful but less tidy would be to make sure it’s exposed only in Mail, and not web-exposed. 1902431 12 ap 2022-09-30 13:11:09 -0700 AFAIK this code path is still runtime switchable. Not sure how long we need to support it (probably needs to be discussed elsewhere). 1902467 13 darin 2022-09-30 14:29:40 -0700 If it’s runtime switchable, and off for web browsers by default, then I agree that internal Apple discussion can help us pinpoint when we can remove it entirely and this bug can be closed as "never to be fixed". 2081886 14 ahmad.saleem792 2024-12-15 07:00:55 -0800 Safari 18.2 shipped with overflowchanged event removed successfully. Marking this as `RESOLVED WONTFIX`. 106362 2011-09-05 15:07:58 -0700 2011-10-17 12:25:11 -0700 Patch bug-67583-20110905150757.patch text/plain 27123 dglazkov U3VidmVyc2lvbiBSZXZpc2lvbjogOTQ1MzEKZGlmZiAtLWdpdCBhL0xheW91dFRlc3RzL0NoYW5n ZUxvZyBiL0xheW91dFRlc3RzL0NoYW5nZUxvZwppbmRleCA2Nzk1N2U1N2NmN2QxMDA5ZDBmZTFj YzQyZjg4NDc0MjE2MWY5MDVjLi43YjM5ZjdjMTgwODU4YjZjNzM0YzhhZTllZTRlYTM0OGMzOGRh MTM3IDEwMDY0NAotLS0gYS9MYXlvdXRUZXN0cy9DaGFuZ2VMb2cKKysrIGIvTGF5b3V0VGVzdHMv Q2hhbmdlTG9nCkBAIC0xLDMgKzEsMTMgQEAKKzIwMTEtMDktMDUgIERpbWl0cmkgR2xhemtvdiAg PGRnbGF6a292QGNocm9taXVtLm9yZz4KKworICAgICAgICBNYWtlIG92ZXJmbG93Y2hhbmdlZCBl dmVudCBhc3luY2hyb25vdXMKKyAgICAgICAgaHR0cHM6Ly9idWdzLndlYmtpdC5vcmcvc2hvd19i dWcuY2dpP2lkPTY3NTgzCisKKyAgICAgICAgUmV2aWV3ZWQgYnkgTk9CT0RZIChPT1BTISkuCisK KyAgICAgICAgKiBmYXN0L2R5bmFtaWMvcGF1c2VkLWV2ZW50LWRpc3BhdGNoLmh0bWw6IFVwZGF0 ZWQgdGhlIHRlc3QgdG8gYW50aWNpcGF0ZSBhc3luY2hyb25vdXMgb3ZlcmZsb3djaGFuZ2VkIGV2 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