Bug 219594

Summary: [GTK][WPE] Overflow/iframe scrolling with async scrolling enabled sometimes doesn't work
Product: WebKit Reporter: Chris Lord <clord>
Component: ScrollingAssignee: Chris Lord <clord>
Status: RESOLVED FIXED    
Severity: Normal CC: cgarcia, cmarcelo, ews-watchlist, fred.wang, jamesr, koivisto, luiz, simon.fraser, tonikitoo, webkit-bug-importer, zan
Priority: P2 Keywords: InRadar
Version: WebKit Nightly Build   
Hardware: Unspecified   
OS: Unspecified   
See Also: https://bugs.webkit.org/show_bug.cgi?id=214179
Attachments:
Description Flags
Patch
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Patch none

Description Chris Lord 2020-12-07 02:17:59 PST 
I dealt with this in bug 214179, but it turns out my implementation was flawed. It's possible for a descendent layer to contain a point that its ancestor doesn't, and this occurs very commonly with iframes (but not at all commonly with overflow scrolling). The Mac backend deals with this by just not doing any bounds checking, so we should do the same with nicosia.
Comment 1 Chris Lord 2020-12-07 02:28:38 PST 
Created attachment 415542 [details]
Patch
Comment 2 Chris Lord 2020-12-07 02:49:44 PST 
Created attachment 415544 [details]
Patch
Comment 3 EWS 2020-12-07 03:30:03 PST 
Committed r270501: <https://trac.webkit.org/changeset/270501>

All reviewed patches have been landed. Closing bug and clearing flags on attachment 415544 [details].
Comment 4 Radar WebKit Bug Importer 2020-12-07 03:31:26 PST 
<rdar://problem/72042253>