157641 - cssRule elements are not created for at-rules

Status: VERIFIED DUPLICATE of bug 35618

(Core :: DOM: CSS Object Model, defect, P3)

Description

[Vladimir Ermakov]

quote from CSS2 spec:
"The CSSRule interface is the abstract base interface for any type of CSS
statement. This includes both rule sets and at-rules. An implementation is
expected to preserve all rules specified in a CSS style sheet, even if the rule
is not recognized by the parser. Unrecognized rules are represented using the
CSSUnknownRule interface."

However Netscape does not create cssRule's for at-rules

To reproduce open up the testcase.

Comment 1

[Vladimir Ermakov]

Attachment: testcase

Comment 2

[Vladimir Ermakov]

Attachment: --> Real Testcase

Sorry attached wrong file accidently

Comment 3

[Boris Zbarsky [:bzbarsky]]

We don't support @page.  So the CSS parser drops it, and hence it is not in the
CSSOM.

Try this with at-rules we actually support (@media, @namespace, @import).

Comment 4

[Vladimir Ermakov]

the spec clearly says "even if the rule is not recognized by the parser"

Comment 5

[Vladimir Ermakov]

Attachment: more complete testcase

Testcase with the at-rules mentioned by Boris

Comment 6

[Vladimir Ermakov]

The at-rules mentioned do not create cssRules as well as @page, as can be seen
in the testcase...

Comment 7

[Boris Zbarsky [:bzbarsky]]

The spec was also written by people who had no idea how CSS actually works.... 
I strongly feel that we should under no circumstances implement CSSUnknownRule
and the spec should be changed in this instance.  glazou?

As for the second testcase, the rules are in a place in the stylesheet where
they are not allowed per the CSS spec. Said spec demands that such rules be
dropped from the sheet.  So the testcase is completely equivalent to the first one.

Comment 8

[Hixie (not reading bugmail)]

i recall the wg agreeing about that, i should check the minutes...

Comment 9

[Daniel Glazman (:glazou) (not active in Mozilla any more)]

See http://lists.w3.org/Archives/Public/www-dom/2001AprJun/0035.html

Comment 10

[Boris Zbarsky [:bzbarsky]]

OK.  So that says "we need to talk about it".  Did that ever happen?

Comment 11

[Boris Zbarsky [:bzbarsky]]

*** This bug has been marked as a duplicate of 35618 ***

Comment 12

[Vladimir Ermakov]

verifying