Bug 178651

Summary: Call FrameView::scheduleSelectionUpdate when selection needs repainting after layout instead of setting the RenderView dirty.
Product: WebKit Reporter: zalan <zalan>
Component: Layout and RenderingAssignee: zalan <zalan>
Status: RESOLVED FIXED    
Severity: Normal CC: bfulgham, commit-queue, darin, dbates, koivisto, simon.fraser, webkit-bug-importer, zalan
Priority: P2 Keywords: InRadar
Version: WebKit Nightly Build   
Hardware: Unspecified   
OS: Unspecified   
Attachments:
Description Flags
Patch none

Description zalan 2017-10-22 19:43:59 PDT 
In https://trac.webkit.org/r167845 (bug 132172), the renderView->setNeedsLayout() call was introduced to trigger selection update.
However this is problematic in a couple of different ways.
1. marking the root renderer dirty does not trigger layout (this is very specific to the root, other renderers do trigger layout) -so this works as long as someone else schedules a layout.
2. when a subtree layout is already scheduled and we mark the root renderer dirty, the root gets stuck with the dirty flag (since the entry point for the subsequent layout is a descendant of the root and not the root itself). -this got revealed with bug 178621.
Comment 1 Radar WebKit Bug Importer 2017-10-22 19:51:05 PDT 
<rdar://problem/35117448>
Comment 2 zalan 2017-10-22 20:16:43 PDT 
Created attachment 324539 [details]
Patch
Comment 3 WebKit Commit Bot 2017-10-23 08:57:55 PDT 
Comment on attachment 324539 [details]
Patch

Clearing flags on attachment: 324539

Committed r223835: <https://trac.webkit.org/changeset/223835>
Comment 4 WebKit Commit Bot 2017-10-23 08:57:56 PDT 
All reviewed patches have been landed.  Closing bug.
Comment 5 Simon Fraser (smfr) 2017-10-23 10:13:10 PDT 
Comment on attachment 324539 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=324539&action=review

> Source/WebCore/page/FrameView.cpp:3192
> +    // However we can't tell at this point if the tree is stable yet, so let's just schedule a root only layout for now.

"root only" sounds weird.
Comment 6 Simon Fraser (smfr) 2017-10-23 10:14:16 PDT 
You didn't undo the TestExpectation changes in https://bugs.webkit.org/attachment.cgi?id=324541 ?