287596 - Outline should not wrap around another outline of a child node

Status: RESOLVED DUPLICATE of bug 480888

(Core :: Layout, defect)

Description

[Martijn Wargers (dead)]

Comment 1

[Martijn Wargers (dead)]

Attachment: Testcase

Oops, I forgot to give some real explanation. 
Well, the testcase should pretty much explain it all.
In the testcase, the 1px solid black outline should be just around this text,
not around the 20px red outline.

Comment 2

[Boris Zbarsky [:bzbarsky]]

Outline wraps around the overflow area, right?  So the real question is whether
outlines cause overflow, which we already have a bug on...

Comment 3

[Robert O'Callahan (:roc) (email my personal email if necessary)]

This is by design really. If we changed outline to not affect overflow, this
would go away.

Comment 4

[Phil Ringnalda (:philor)]

*** Bug 341566 has been marked as a duplicate of this bug. ***

Comment 5

[FataL]

Attachment: CSS outline nesting test

This test currently passed only by Opera. Firefox fails the most.

Comment 6

[David Baron :dbaron: (⌚️UTC-4, no longer working on Mozilla)]

I don't think there's any reason to describe the Firefox behavior as failing.  The spec is intentionally very vague (see http://www.w3.org/TR/CSS21/ui.html#dynamic-outlines ) so that implementations can optimize outlines to be whatever is appropriate for focus outlines.  (And, honestly, what happens with nested outlines shouldn't matter since that's not a use case for focus outlines.)

Comment 7

[David Baron :dbaron: (⌚️UTC-4, no longer working on Mozilla)]

Fixed by 480888.