The grammar needs at least at-rule added but I agree that making it stylesheet would be really bad. As an implementer it makes no sense for me to go into at-rule error recovery or at-rule parsing inside of the media block if the grammar doesn't even allow the construct to exist. Of course, this is why this discussion started because IE/Opera read the grammar to disallow at-rule altogether and so go into rule-set error recovery whenever something is seen that isn't understood. Grammar wise adding at-rule will force me to put in code to process at-rule's within the media block. Spec wise saying that at-rules are to be ignored if present (and consequently that at-rule error recovery should be used on a syntax error and not rule-set error recovery) will make the forward compatible stuff work as expected. Justin Rogers [MSFT] -----Original Message----- From: www-style-request@w3.org [mailto:www-style-request@w3.org] On Behalf Of fantasai Sent: Thursday, July 03, 2008 4:09 PM To: Bjoern Hoehrmann Cc: www-style@w3.org Subject: Re: [CSS2.1] Grammar for @media versus general block parsing Bjoern Hoehrmann wrote: > * fantasai wrote: >> Proposal: >> Change 'ruleset' to 'stylesheet' in the @media grammar. >> State in 7.2.1 that "At-rules inside @media are invalid in CSS2.1 >> and must be ignored per 4.2 Rules for handling parsing errors." > > That would allow CDO and CDC in @media which is probably not intended. I > tested this when the issue came up, I think only IE6 had interesting be- > havior for this case. So would only making the change in 7.2.1 and not changing the grammar be adequate? ~fantasaiReceived on Friday, 4 July 2008 19:12:16 UTC
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