Bug 210216
| Summary: | Generate event region for every root layer | ||
|---|---|---|---|
| Product: | WebKit | Reporter: | Daniel Bates <dbates> |
| Component: | WebCore Misc. | Assignee: | Nobody <webkit-unassigned> |
| Status: | NEW | ||
| Severity: | Normal | CC: | simon.fraser |
| Priority: | P2 | ||
| Version: | WebKit Local Build | ||
| Hardware: | Unspecified | ||
| OS: | Unspecified | ||
| See Also: |
https://bugs.webkit.org/show_bug.cgi?id=210041 https://bugs.webkit.org/show_bug.cgi?id=210311 |
||
Daniel Bates
RenderLayer::invalidateEventRegion() and RenderLayerBacking::updateEventRegion() only generate an event region for non-root layers so the UI process has more info for hit testing.
| Attachments | ||
|---|---|---|
| Add attachment proposed patch, testcase, etc. |
Daniel Bates
This bug came up while considering alt patch attachment #395855 [details] (bug 210041). It removed an iOS compile-time guard from RenderLayer::invalidateEventRegion(), which made causes this progression:
[[
--- /Volumes/Data/worker/macOS-Mojave-Release-WK2-Tests-EWS/build/layout-test-results/fast/scrolling/mac/event-region-subframe-expected.txt
+++ /Volumes/Data/worker/macOS-Mojave-Release-WK2-Tests-EWS/build/layout-test-results/fast/scrolling/mac/event-region-subframe-actual.txt
@@ -6,6 +6,9 @@
(GraphicsLayer
(bounds 800.00 600.00)
(contentsOpaque 1)
+ (event region
+ (rect (0,0) width=800 height=600)
+ )
(children 1
(GraphicsLayer
(position 8.00 8.00)
]]