Bug 56246 – Investigate table relative positioning support

• Status: RESOLVED
• Resolution: FIXED
• Component: Tables

[Dave Hyatt]

Investigate whether or not table cells and other table parts could support relative positioning to enable us to remove the hacks that have built up around this area.

[Dave Hyatt]

Created attachment 85579 [details]
Stacking test for table cells with relative positioning.

[Dave Hyatt]

The first test is a stacking test.  It shows that position:relative on table cells does in fact affect stacking order in both FFX and IE.

[Dave Hyatt]

Created attachment 85580 [details]
Offset test for table cells with relative positioning.

Offset test for relative positioning.  Results show that IE8 does in fact respect left/top as well as position:relative on table cells.  FFX does not respect the offsets.

[Dave Hyatt]

Created attachment 85581 [details]
Containing block test for table cells with relative positioning

Third test, a containing block test.  IE8 supports the relative positioned table cell acting as a containing block for absolutely positioned descendants.  Firefox does not.

As far as I can tell we can safely enable relative positioning on table cells.  IE fully supports it, so we can too.

[Jeremy Moskovich]

When a fix for this lands, http://trac.webkit.org/changeset/80814 should be reverted.

[Dave Hyatt]

Created attachment 85710 [details]
Patch

[WebKit Review Bot]

Attachment 85710 [details] did not pass style-queue:

Failed to run "['Tools/Scripts/check-webkit-style', '--diff-files', u'LayoutTests/ChangeLog', u'LayoutTests/fast..." exit_code: 1

Source/WebCore/css/CSSStyleSelector.cpp:1938:  Boolean expressions that span multiple lines should have their operators on the left side of the line instead of the right side.  [whitespace/operators] [4]
Total errors found: 1 in 14 files


If any of these errors are false positives, please file a bug against check-webkit-style.

[Dave Hyatt]

Fixed in r81049.