Bug 197150 - Clarify normal flow vs. stacking layers in RenderLayer
Summary: Clarify normal flow vs. stacking layers in RenderLayer
Status: NEW
Alias: None
Product: WebKit
Classification: Unclassified
Component: Layout and Rendering (show other bugs)
Version: WebKit Nightly Build
Hardware: Unspecified Unspecified
: P2 Normal
Assignee: Nobody
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2019-04-21 10:10 PDT by Simon Fraser (smfr)
Modified: 2019-04-23 14:00 PDT (History)
3 users (show)

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Description Simon Fraser (smfr) 2019-04-21 10:10:22 PDT 
collectZOrderLayers() has logic that says:

bool stacking = isStackingContext();
if (!isNormalFlowOnly())
...

but it's no clear if a layer can be neither stacking nor normal flow only.
Comment 1 Simon Fraser (smfr) 2019-04-23 14:00:55 PDT 
A position:relative layer is not normal flow, and not a stacking context.