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Re: selector matching question

From: Kishore Kulkarni <kulkarni@pathcom.com>
Date: Wed, 22 Sep 1999 21:12:11 -0400
Message-ID: <008201bf0560$ab2214c0$6491fad1@kulkarni.pathcom.com>
To: "Bert Bos" <Bert.Bos@sophia.inria.fr>, "Ranjit Singhe" <ranjit_singhe@mail.com>
Cc: <www-style@w3.org>
Kartik is not on this email anymore.  Please do not send any mail to
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-----Original Message-----
From: Bert Bos <Bert.Bos@sophia.inria.fr>
To: Ranjit Singhe <ranjit_singhe@mail.com>
Cc: www-style@w3.org <www-style@w3.org>
Date: Wednesday, September 22, 1999 5:36 PM
Subject: Re: selector matching question


>Ranjit Singhe writes:
>> hello,
>>
>> this (i hope) is not a css writing question. it is more a selector
matching
>> question.  i've attached a simple html file that uses styles.
>>
>> it has to do with ancestral resolution.  when you look at the html it
should
>> be fairly clear what i'm trying to do.
>>
>> for a while now i've been using gecko to test my resolution cases, so try
it
>> in gecko; hence this post. :)
>>
>> here's my question (the atmt. reflects this case):
>>
>> if an element (SPAN) has two ancestors of the same name (OL)
>>
>> e.g.
>
>...+-- DIV
>...+-- DIV
>........+-- OL
>.............+-- DIV
>..................+-- DIV
>........................+-- OL
>.............................+-- SPAN
>...................................+-- (Text)
>
>> and there are two styles in order as follows:
>>
>> DIV > DIV OL SPAN { color: blue }          --- (1)
>> DIV + DIV OL SPAN { color: magenta }       --- (2)
>>
>> what is the color of (Text) ??
>>
>> i think it should be magenta 'cos:
>> a. OL parent of SPAN is found
>> (1) succeeds
>> (2) fails
>> b. because 2 failed, we look further up and find
>> OL parent of DIV
>> (1) fails
>> (2) succeeds
>> c. because 1 failed, we look further up and find no
>> more ancestors with name OL
>>
>> because (2) is chronologically after (1), the text should be magenta 'cos
it
>> beats (1) on the collisions.  (i say this 'cos the specificity (= 4) and
>> owner (= author) are the same.)
>>
>> even if (1) and (2) had succeeded at stage b., (2) would win because of
the
>> chronology contest.
>>
>> am i right???
>
>I believe you are.
>
>With the new selectors in CSS2 it has become necessary to test
>multiple ways to match a selector against a tree of elements. There is
>no rule that says that the OL ancestor of SPAN must be the nearest
>ancestor.
>
>
>Bert
>--
>  Bert Bos                                ( W 3 C ) http://www.w3.org/
>  http://www.w3.org/people/bos/                              W3C/INRIA
>  bert@w3.org                             2004 Rt des Lucioles / BP 93
>  +33 (0)4 92 38 76 92            06902 Sophia Antipolis Cedex, France
>
>
Received on Wednesday, 22 September 1999 21:05:57 GMT

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