[Webkit-unassigned] [Bug 112994] New: Odd baseline calculation with spans, etc, in td with vertical-align:top

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=112994

           Summary: Odd baseline calculation with spans, etc, in td with
                    vertical-align:top
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P2
         Component: CSS
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: dylanryan at mac.com


Created an attachment (id=194423)
 --> (https://bugs.webkit.org/attachment.cgi?id=194423&action=review)
Test case

I believe this is SOMEWHAT related to https://bugs.webkit.org/show_bug.cgi?id=93925 .

In this case, sibling elements seem to be sharing a baseline even if there is no particular reason to. The following example has a table with two rows (each with one column). Each cell has alternating text in and not in spans, with the last span having a larger height than anything else (either due to an image, or a specific height specified in css).

Safari and Chrome have all the spans share the same baseline, and the non-span text using their own baseline, causing a strange up-and-down jumpy flow. Firefox uses the same baseline used in the spans for the non-span text, which results in a consistent line of text. I personally prefer firefox's implementation here.

Sample code and screenshots attached

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