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RESOLVED FIXED
157482
Horizontally-scrollable items with a 3d transform are rendered incorrectly in RTL when container has -webkit-overflow-scroll: touch
https://bugs.webkit.org/show_bug.cgi?id=157482
Summary
Horizontally-scrollable items with a 3d transform are rendered incorrectly in...
Matthew Wetmore
Reported
2016-05-09 12:38:34 PDT
Created
attachment 278424
[details]
A small HTML file reproducing the bug. In RTL, a set of inline elements within a horizontally-scrollable container will flow from right to left, and the container starts scrolled all the way to the right. With default scrolling, adding a 3d transform to the items in the scrollable container causes no problem. However, on iOS safari, adding -webkit-overflow-scroll: touch to the scrollable container causes any elements of the scroller with a 3d transform to be rendered in the wrong position. For this bug to occur, there must be enough elements in the scrollable container that the container can actually scroll. Viewing the buggy page with the web inspector shows that the browser thinks the elements are in the correct place (and their tap targets still exist in the correct place as well), but the elements are drawn in the wrong position. I've attached a small HTML file which reproduces the issue.
Attachments
A small HTML file reproducing the bug.
(850 bytes, text/html)
2016-05-09 12:38 PDT
,
Matthew Wetmore
no flags
Details
Fixed testcase
(818 bytes, text/html)
2016-05-10 15:37 PDT
,
Simon Fraser (smfr)
no flags
Details
Patch
(5.99 KB, patch)
2016-05-10 17:07 PDT
,
Simon Fraser (smfr)
zalan
: review+
buildbot
: commit-queue-
Details
Formatted Diff
Diff
Archive of layout-test-results from ews103 for mac-yosemite
(795.41 KB, application/zip)
2016-05-10 17:53 PDT
,
Build Bot
no flags
Details
Archive of layout-test-results from ews104 for mac-yosemite-wk2
(785.00 KB, application/zip)
2016-05-10 17:54 PDT
,
Build Bot
no flags
Details
Archive of layout-test-results from ews115 for mac-yosemite
(1.39 MB, application/zip)
2016-05-10 18:12 PDT
,
Build Bot
no flags
Details
View All
Add attachment
proposed patch, testcase, etc.
Radar WebKit Bug Importer
Comment 1
2016-05-10 14:16:06 PDT
<
rdar://problem/26204794
>
Simon Fraser (smfr)
Comment 2
2016-05-10 15:35:49 PDT
I cannot reproduce with the attached testcase on an iPad mini with 9.3.1 (making #scroller narrow enough to scroll). Note that the test case has no 3d-transformed items.
Simon Fraser (smfr)
Comment 3
2016-05-10 15:37:55 PDT
Created
attachment 278541
[details]
Fixed testcase
Simon Fraser (smfr)
Comment 4
2016-05-10 15:39:13 PDT
I can with the revised test case
Simon Fraser (smfr)
Comment 5
2016-05-10 17:07:10 PDT
Created
attachment 278553
[details]
Patch
Build Bot
Comment 6
2016-05-10 17:53:14 PDT
Comment on
attachment 278553
[details]
Patch
Attachment 278553
[details]
did not pass mac-ews (mac): Output:
http://webkit-queues.webkit.org/results/1300958
New failing tests: compositing/rtl/rtl-with-transformed-descendants.html
Build Bot
Comment 7
2016-05-10 17:53:18 PDT
Created
attachment 278558
[details]
Archive of layout-test-results from ews103 for mac-yosemite The attached test failures were seen while running run-webkit-tests on the mac-ews. Bot: ews103 Port: mac-yosemite Platform: Mac OS X 10.10.5
Build Bot
Comment 8
2016-05-10 17:54:19 PDT
Comment on
attachment 278553
[details]
Patch
Attachment 278553
[details]
did not pass mac-wk2-ews (mac-wk2): Output:
http://webkit-queues.webkit.org/results/1300956
New failing tests: compositing/rtl/rtl-with-transformed-descendants.html
Build Bot
Comment 9
2016-05-10 17:54:22 PDT
Created
attachment 278559
[details]
Archive of layout-test-results from ews104 for mac-yosemite-wk2 The attached test failures were seen while running run-webkit-tests on the mac-wk2-ews. Bot: ews104 Port: mac-yosemite-wk2 Platform: Mac OS X 10.10.5
Build Bot
Comment 10
2016-05-10 18:12:31 PDT
Comment on
attachment 278553
[details]
Patch
Attachment 278553
[details]
did not pass mac-debug-ews (mac): Output:
http://webkit-queues.webkit.org/results/1300992
New failing tests: compositing/rtl/rtl-with-transformed-descendants.html
Build Bot
Comment 11
2016-05-10 18:12:35 PDT
Created
attachment 278562
[details]
Archive of layout-test-results from ews115 for mac-yosemite The attached test failures were seen while running run-webkit-tests on the mac-debug-ews. Bot: ews115 Port: mac-yosemite Platform: Mac OS X 10.10.5
Simon Fraser (smfr)
Comment 12
2016-05-10 18:56:23 PDT
https://trac.webkit.org/r200665
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