Bug 259172

Summary: Wide-layout attachment baseline: Ensure it's relative to the border box
Product: WebKit Reporter: Gerald Squelart <g_squelart>
Component: HTML EditingAssignee: Gerald Squelart <g_squelart>
Status: ASSIGNED ---    
Severity: Normal CC: webkit-bug-importer, wenson_hsieh
Priority: P2 Keywords: InRadar
Version: WebKit Nightly Build   
Hardware: Unspecified   
OS: Unspecified   
Bug Depends on: 258868    
Bug Blocks:    

Description Gerald Squelart 2023-07-12 20:54:09 PDT 
Bug 258868 changed the baseline computation to just using `height`s, which may be slightly incorrect.

sgill26 said in https://github.com/WebKit/WebKit/pull/15558#discussion_r1254875925 :
One thing I'm wondering is if we should be using the margin box for the renderer here? I was looking at the other implementations of baselinePosition and they all see to return a value in terms of the margin box, but here we are using the border box.
Comment 1 Radar WebKit Bug Importer 2023-07-12 20:54:20 PDT 
<rdar://problem/112175434>