[Webkit-unassigned] [Bug 28867] New: Presentation of fieldsets magically and irreversibly changes when the fieldset contains a legend

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=28867

           Summary: Presentation of fieldsets magically and irreversibly
                    changes when the fieldset contains a legend
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Macintosh Intel
        OS/Version: Mac OS X 10.5
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: justin at indent.com.au


When you add a legend element as a child to a fieldset, the fieldset's
appearance changes in a way which isn't reflected in the Inspector, doesn't
appear to be done with styles, and can't be corrected or reversed by applying
additional styles.

I know and fully understand that this is the default presentation style for
fieldsets with legends in many user agents, but my concern is that these visual
changes do not appear to have been done with CSS, are not reflected in the
Inspector pallet, and can't be reversed or altered by a stylesheet author who
is aiming for a different presentation.

The Safari HTML reference seems to describe the behavior (emphasis mine):
"This tag specifies the label for a fieldset (specified by the <fieldset> tag).
The caption specified by content is *merged with the box surrounding the
fieldset.*"

I'm not arguing that this should not be the default presentational style, but I
am arguing that it should be achieved with regular styles and positioning, so
that stylesheet authors can alter the presentation to suit their needs.  The
only choice I seem to have right now is absolutely positioning the legend
within a relatively positioned fieldset.

If it *is* possible to alter this default presentation (perhaps by altering a
-webkit value somewhere, I'd love for it to be known and documented.

For the record, when a fieldset has a legend child element added to it, the
visual changes are best described as follows:

* hovering over the element with the inspector seems to show the box with the
same top position (where it would be located if there was no legend element)
* the visual top edge of the fieldset box (where the border and background
color starts) appears to shift down by half the line height of the legend
element
* the legend element is shifted up by half it's line height

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