NEW 255265
elementsFromPoint doesn't handle sorting preserve-3d 
https://bugs.webkit.org/show_bug.cgi?id=255265
Summary elementsFromPoint doesn't handle sorting preserve-3d
Matt Woodrow
Reported 2023-04-10 18:33:51 PDT
RenderLayer::hitTestLayer only handles finding a single hit layer when we're doing 3d depth sorting for transform-style:preserve-3d. If we're using elementsFromPoint and want to return all the elements at the point, we don't handle sorting these by depth. I think we need to collect a list of HitTestResult objects (and HitLayer objects), with the associated depth, and then sort the result by depth at the end and merge into a single HitTestResult object. This list would need to be passed into RenderLayer::hitTestList so that we can append to it from there rather than returning a single result from hitTestList.
Attachments
Testcase (1.09 KB, text/html)
2023-04-10 18:36 PDT, Matt Woodrow 		no flags
Details
View All Add attachment proposed patch, testcase, etc.
Radar WebKit Bug Importer
Comment 1 2023-04-10 18:34:09 PDT
<rdar://problem/107861877>
Matt Woodrow
Comment 2 2023-04-10 18:34:15 PDT
It looks like blink has the same bug here, but Gecko gets it right.
Matt Woodrow
Comment 3 2023-04-10 18:36:20 PDT
Created attachment 465841 [details] Testcase
Note You need to log in before you can comment on or make changes to this bug.