Bug 196885

Summary: [iOS WK2] Clipped, absolutely positioned elements inside overflow:scroll jiggle
Product: WebKit Reporter: Simon Fraser (smfr) <simon.fraser>
Component: New BugsAssignee: Simon Fraser (smfr) <simon.fraser>
Status: NEW    
Severity: Normal CC: ews-watchlist, koivisto, rniwa, simon.fraser, webkit-bug-importer, zalan
Priority: P2 Keywords: InRadar
Version: WebKit Nightly Build   
Hardware: Unspecified   
OS: Unspecified   
Attachments:
Description Flags
Patch
none
Patch
none
Patch
none
Archive of layout-test-results from ews107 for mac-highsierra-wk2
none
Archive of layout-test-results from ews125 for ios-simulator-wk2
none
Patch
none
Archive of layout-test-results from ews104 for mac-highsierra-wk2
none
Archive of layout-test-results from ews125 for ios-simulator-wk2
none
WIP none

Simon Fraser (smfr)
Reported 2019-04-12 16:52:45 PDT
[iOS WK2] Clipped, absolutely positioned elements inside overflow:scroll jiggle
Attachments
Patch (15.34 KB, patch)
2019-04-12 16:55 PDT, Simon Fraser (smfr) 		no flags
DetailsFormatted DiffDiff
Patch (45.80 KB, patch)
2019-04-16 08:48 PDT, Simon Fraser (smfr) 		no flags
DetailsFormatted DiffDiff
Patch (47.92 KB, patch)
2019-04-17 09:46 PDT, Simon Fraser (smfr) 		no flags
DetailsFormatted DiffDiff
Archive of layout-test-results from ews107 for mac-highsierra-wk2 (2.94 MB, application/zip)
2019-04-17 11:13 PDT, EWS Watchlist 		no flags
Details
Archive of layout-test-results from ews125 for ios-simulator-wk2 (2.69 MB, application/zip)
2019-04-17 14:45 PDT, EWS Watchlist 		no flags
Details
Patch (46.83 KB, patch)
2019-05-22 21:18 PDT, Simon Fraser (smfr) 		no flags
DetailsFormatted DiffDiff
Archive of layout-test-results from ews104 for mac-highsierra-wk2 (2.69 MB, application/zip)
2019-05-22 22:38 PDT, EWS Watchlist 		no flags
Details
Archive of layout-test-results from ews125 for ios-simulator-wk2 (2.56 MB, application/zip)
2019-05-22 23:16 PDT, EWS Watchlist 		no flags
Details
WIP (84.13 KB, patch)
2019-05-24 08:27 PDT, Simon Fraser (smfr) 		no flags
DetailsFormatted DiffDiff
Show Obsolete (6) View All Add attachment proposed patch, testcase, etc.
Simon Fraser (smfr)
Comment 1 2019-04-12 16:55:39 PDT
Created attachment 367358 [details] Patch
Radar WebKit Bug Importer
Comment 2 2019-04-12 16:58:08 PDT
<rdar://problem/49869033>
Simon Fraser (smfr)
Comment 3 2019-04-12 17:45:07 PDT
Comment on attachment 367358 [details] Patch Patch needs something for "moves" nodes too.
Simon Fraser (smfr)
Comment 4 2019-04-13 10:59:32 PDT
I think we need to compute a ScrollPositioningBehavior for both the ancestor clipping layer and for the primary layer, and teach the scrolling tree nodes about ancestor clipping layers. I'm not sure this will suffice in all cases (the ancestor clipping can be contributed to by multiple ancestors). We might need to make scrolling tree nodes that represent that clipping ancestor, which currently may not be represented in the graphics layer tree.
Simon Fraser (smfr)
Comment 5 2019-04-13 10:59:46 PDT
I'm concerned that this is getting arbitrarily complex.
Simon Fraser (smfr)
Comment 6 2019-04-16 08:48:07 PDT
Created attachment 367538 [details] Patch
Simon Fraser (smfr)
Comment 7 2019-04-17 09:46:43 PDT
Created attachment 367636 [details] Patch
EWS Watchlist
Comment 8 2019-04-17 11:13:38 PDT
Comment on attachment 367636 [details] Patch Attachment 367636 [details] did not pass mac-wk2-ews (mac-wk2): Output: https://webkit-queues.webkit.org/results/11901912 New failing tests: scrollingcoordinator/scrolling-tree/positioned-nodes.html scrollingcoordinator/scrolling-tree/positioned-nodes-complex.html scrollingcoordinator/scrolling-tree/nested-absolute-in-relative-in-overflow.html scrollingcoordinator/scrolling-tree/nested-absolute-in-sc-overflow.html scrollingcoordinator/scrolling-tree/nested-absolute-in-absolute-overflow.html
EWS Watchlist
Comment 9 2019-04-17 11:13:39 PDT
Created attachment 367653 [details] Archive of layout-test-results from ews107 for mac-highsierra-wk2 The attached test failures were seen while running run-webkit-tests on the mac-wk2-ews. Bot: ews107 Port: mac-highsierra-wk2 Platform: Mac OS X 10.13.6
EWS Watchlist
Comment 10 2019-04-17 14:45:02 PDT
Comment on attachment 367636 [details] Patch Attachment 367636 [details] did not pass ios-sim-ews (ios-simulator-wk2): Output: https://webkit-queues.webkit.org/results/11905076 New failing tests: scrollingcoordinator/scrolling-tree/positioned-nodes.html scrollingcoordinator/scrolling-tree/positioned-nodes-complex.html scrollingcoordinator/scrolling-tree/nested-absolute-in-relative-in-overflow.html scrollingcoordinator/scrolling-tree/nested-absolute-in-sc-overflow.html scrollingcoordinator/scrolling-tree/nested-absolute-in-absolute-overflow.html
EWS Watchlist
Comment 11 2019-04-17 14:45:03 PDT
Created attachment 367680 [details] Archive of layout-test-results from ews125 for ios-simulator-wk2 The attached test failures were seen while running run-webkit-tests on the ios-sim-ews. Bot: ews125 Port: ios-simulator-wk2 Platform: Mac OS X 10.13.6
Simon Fraser (smfr)
Comment 12 2019-05-22 21:18:32 PDT
Created attachment 370483 [details] Patch
EWS Watchlist
Comment 13 2019-05-22 22:38:27 PDT
Comment on attachment 370483 [details] Patch Attachment 370483 [details] did not pass mac-wk2-ews (mac-wk2): Output: https://webkit-queues.webkit.org/results/12265898 New failing tests: scrollingcoordinator/scrolling-tree/positioned-nodes.html scrollingcoordinator/scrolling-tree/nested-absolute-in-absolute-overflow.html scrollingcoordinator/scrolling-tree/absolute-in-nested-sc-scrollers.html scrollingcoordinator/scrolling-tree/positioned-nodes-complex.html scrollingcoordinator/scrolling-tree/nested-overflow-scroll.html scrollingcoordinator/scrolling-tree/nested-absolute-in-relative-in-overflow.html scrollingcoordinator/scrolling-tree/nested-absolute-in-sc-overflow.html
EWS Watchlist
Comment 14 2019-05-22 22:38:29 PDT
Created attachment 370489 [details] Archive of layout-test-results from ews104 for mac-highsierra-wk2 The attached test failures were seen while running run-webkit-tests on the mac-wk2-ews. Bot: ews104 Port: mac-highsierra-wk2 Platform: Mac OS X 10.13.6
EWS Watchlist
Comment 15 2019-05-22 23:16:53 PDT
Comment on attachment 370483 [details] Patch Attachment 370483 [details] did not pass ios-sim-ews (ios-simulator-wk2): Output: https://webkit-queues.webkit.org/results/12265945 New failing tests: scrollingcoordinator/scrolling-tree/positioned-nodes.html scrollingcoordinator/scrolling-tree/nested-absolute-in-absolute-overflow.html scrollingcoordinator/scrolling-tree/absolute-in-nested-sc-scrollers.html scrollingcoordinator/scrolling-tree/positioned-nodes-complex.html scrollingcoordinator/scrolling-tree/nested-overflow-scroll.html scrollingcoordinator/scrolling-tree/nested-absolute-in-relative-in-overflow.html scrollingcoordinator/scrolling-tree/nested-absolute-in-sc-overflow.html
EWS Watchlist
Comment 16 2019-05-22 23:16:55 PDT
Created attachment 370491 [details] Archive of layout-test-results from ews125 for ios-simulator-wk2 The attached test failures were seen while running run-webkit-tests on the ios-sim-ews. Bot: ews125 Port: ios-simulator-wk2 Platform: Mac OS X 10.14.5
Simon Fraser (smfr)
Comment 17 2019-05-24 08:27:27 PDT
Created attachment 370571 [details] WIP
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