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Re: ::part Additions

From: Bronislav Klučka <Bronislav.Klucka@bauglir.com>
Date: Tue, 02 Jul 2013 18:16:16 +0200
Message-ID: <51D2FCD0.9050207@bauglir.com>
To: "Tab Atkins Jr." <jackalmage@gmail.com>
CC: public-webapps <public-webapps@w3.org>

On 2.7.2013 18:03, Tab Atkins Jr. wrote:
> On Tue, Jul 2, 2013 at 8:52 AM, Bronislav Klučka
> <Bronislav.Klucka@bauglir.com> wrote:
>> On 2.7.2013 17:28, Tab Atkins Jr. wrote:
>>> On Tue, Jul 2, 2013 at 6:32 AM, Bronislav Klučka
>>> <Bronislav.Klucka@bauglir.com> wrote:
>>>> 2/ change of part attribute from DOMString to DOMTokenList
>>> This sounds all right.  part='' is already class-like, since multiple
>>> elements can have the same part='' value.  The example at your page is
>>> pretty compelling about this ability's usage.  I guess ::part() would
>>> also expand to taking a list of idents.
>> Why would it? We have established convention for AND operator
>> .class1.class2
>> would became
>> ::part(node-checked)::part(node-selected)
>>
>> and for OR operator
>> .class1, .class2
>> would became
>> ::part(node-checked), ::part(node-selected)
>>
>> :matches(.class1, .class2)
>> would became
>> :matches(::part(node-checked), ::part(node-selected))
> Oh, no no no.  ::part() is not a pseudo-class, it's a pseudo-element -
> it points to a brand new element, rather than filtering the one you've
> got.  The fact that part='' is acting like class='' notwithstanding,
> using ::part() like would be an abuse of the syntax.  If we want to
> support this, it has to be through something like "::part(node-checked
> node-selected)".
>
> As an example of why violating the syntax model is a bad idea, this
> directly conflicts with your desire to surface the ::part()s of nested
> components - the thing that exposes them might be exposed as a
> ::part() as well, so you need to be able to chain off of an existing
> ::part(), like "x-video::part(controls)::part(play-button)" (assuming
> the controls were actually implemented by another component nested
> inside the <x-video> shadow tree).
>
> ~TJ
so
x-video::part(controls)::part(play-button)
would target part="play-button" within part="controls" within x-video?

and the list of idents
::part(part1 part2) {without comma? with comma?}
would target part="part1 part2"? an AND operator?

the OR I've mentioned being correct?

so how about this:

::part(node-checked)::part(node-selected)
would represent any selected node within checked node (regardless of level of nesting)
::part(node-checked) > ::part(node-selected)
would represent selected node within checked node (directly within, no other part in between)

?





Brona
Received on Tuesday, 2 July 2013 16:16:41 UTC

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