[Webkit-unassigned] [Bug 234980] New: Look into reparenting for top layer RenderLayers

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=234980

            Bug ID: 234980
           Summary: Look into reparenting for top layer RenderLayers
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: ntim at apple.com
                CC: bfulgham at webkit.org, simon.fraser at apple.com,
                    zalan at apple.com
            Blocks: 84635

Why?

- Avoid a myriad of establishesTopLayer() checks over the place
- Avoids needing to think about top layer later on


Tasks:
- Make RenderLayer::addChild/updateLayerPosition and anything else that relies on renderer hierarchy
- Need to look into a bunch of new assertions
- Fix visibility code to not be affected by layer reparenting (DOM/flat tree hierarchy should be followed for visibility, like for display)


Referenced Bugs:

https://bugs.webkit.org/show_bug.cgi?id=84635
[Bug 84635] Implement the dialog element
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