Bug 197057

Summary: Tile update problems in iframe after scrolling page too soon after load
Product: WebKit Reporter: Antti Koivisto <koivisto>
Component: ScrollingAssignee: Nobody <webkit-unassigned>
Status: RESOLVED FIXED    
Severity: Normal CC: commit-queue, simon.fraser, webkit-bug-importer
Priority: P2 Keywords: InRadar
Version: WebKit Nightly Build   
Hardware: Unspecified   
OS: Unspecified   
Attachments:
Description Flags
patch none

Description Antti Koivisto 2019-04-18 08:03:15 PDT 
Summary:
Tile update problems in iframe after scrolling page to quickly after load

Steps To Reproduce:
1. https://www.bloomberg.com/graphics/2018-tesla-tracker/
2. Scroll down to Tesla Production Blog section
3. Scroll the blog iframe

Results:
If you started scrolling the main page immediately after the page load to get to the blog, the iframe doesn’t generate tiles when scrolling. There is a main page scrolling jump soon after the load completes which may be related (some viewport update thing?)

If you simply wait a bit after the page load without scrolling anything, the iframe scrolling works fine too later. Waiting until Reader availability text goes away is sufficient.
Comment 1 Antti Koivisto 2019-04-18 08:06:28 PDT 
<rdar://problem/49913663>
Comment 2 Antti Koivisto 2019-04-18 08:10:32 PDT 
Created attachment 367728 [details]
patch
Comment 3 WebKit Commit Bot 2019-04-18 09:32:04 PDT 
Comment on attachment 367728 [details]
patch

Clearing flags on attachment: 367728

Committed r244426: <https://trac.webkit.org/changeset/244426>
Comment 4 WebKit Commit Bot 2019-04-18 09:32:05 PDT 
All reviewed patches have been landed.  Closing bug.