92494 - Eliminate the TableTHRule

Status: RESOLVED WONTFIX

(Core :: CSS Parsing and Computation, defect)

Description

[David Hyatt]

David Baron and I have been studying the TableTHRule and believe that it should
be eliminated in favor of a simple center alignment rule in html.css.  This will
make us behave exactly the same as MacIE, but it will cause us to deviate from
NS4.x and IE behavior.

The code simplification that we can get from this and the fact that it is more
sensical behavior anyway (IE on Win32 probably just emulated the quirky Nav4.x
behavior here) leads me to believe this is worth it.

Comment 1

[David Hyatt]

Attachment: testcase, quirks mode

Comment 2

[David Baron :dbaron: (⌚️UTC-5, no longer working on Mozilla)]

Attachment: testcase, strict mode

Comment 3

[David Baron :dbaron: (⌚️UTC-5, no longer working on Mozilla)]

    MozQ     MozS      MacIE5
    WinIE5
    WinIE6Q  WinIE6S
DC    C        L         C         C
DH    C        L         C         C
CH    L        L         L         L
CC    L        L         L         C
RH    L        L         C         L
RC    L        L         C         C
TC    L        L         C         C
--    C        L         C         C

Comment 4

[David Baron :dbaron: (⌚️UTC-5, no longer working on Mozilla)]

The unlabeled column was Nav4 (on Mac).

Comment 5

[David Baron :dbaron: (⌚️UTC-5, no longer working on Mozilla)]

Corrected table:

    MozQ     MozS      MacIE5    Nav4Mac
    WinIE5
    WinIE6Q  WinIE6S
DC    C        L         C         C
DH    C        L         C         C
CH    L        L         L         L
CC    L        L         L         C
RH    L        L         C         L
RC    L        L         C         C
TC    L        L         C         C
--    C        C         C         C

Comment 6

[Thomas]

tested with Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8a4)
Gecko/20040927 on Windows XP.

example 1, quircks mode: C, C, L, L, L, L, L, C 
example 2, strict mode: L, L, L, L, L, L, L, C

Comment 7

[Michael Kohler [:mkohler]]

This is a mass change. Every comment has "assigned-to-new" in it.

I didn't look through the bugs, so I'm sorry if I change a bug which shouldn't be changed. But I guess these bugs are just bugs that were once assigned and people forgot to change the Status back when unassigning.

Comment 8

[David Baron :dbaron: (⌚️UTC-5, no longer working on Mozilla)]

Bug 475986 changed the behavior here based on a newer compatibility analysis and made things less quirky.  I think this should be wontfix.