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Re: [css3-selectors] ::selection

From: David Hyatt <hyatt@apple.com>
Date: Mon, 26 Nov 2007 14:51:49 -0600
To: Allan Sandfeld Jensen <kde@carewolf.com>
Cc: www-style@w3.org
Message-id: <122EB317-950D-44E0-A767-A12AE27287D9@apple.com>

On Nov 26, 2007, at 2:34 PM, Allan Sandfeld Jensen wrote:

>
> On Monday 26 November 2007 19:05, Anne van Kesteren wrote:
>> The Selectors Level 3 specification should probably go into more  
>> detail on
>> how boxes for ::selection are to be generated so that it's clear  
>> how it
>> interacts with other styles, etc. That would also help if someone  
>> decides
>> to support background-image for ::selection.
>>
>> WebKit and Gecko support it in such a way that it doesn't affect the
>> selection color of child elements. So if you have:
>>
>>    p::selection { background:lime }
>>
>>    <p>FOO<span>BAR</span>BAZ</p>
>>
>> and someone selects "FOOBARBAZ" "BAR" will have the default selection
>> color. I don't really care about how this is going to be done, but  
>> I'd
>> like it to be defined.
>>
>> (It would probably be good if someone tackled ::first-letter and
>>
>> ::first-line too which have similar issues.)
>
> I am surprised WebKit doesn't support that case, since KHTML does  
> and I think
> we implemented ::selection after WebKit example.
>

::selection is not "inherited" in WebKit.  This was how I implemented  
it, since it was never really clear to me whether or not ::selection  
was supposed to be "inherited."  I am putting the word "inherited" in  
quotes because really any inheritance model would have to be more  
like text-decoration (with the concept of using the nearest enclosing  
ancestor that specified a ::selection as the one  that should draw).

It still isn't really clear to me how ::selection should be defined,  
especially with WebKit's selection model of OS X-style gap-filling to  
the edge of lines and between blocks (it's not clear who the "owner"  
of those gaps is as far as ::selection is concerned).

dave
(hyatt@apple.com)
Received on Monday, 26 November 2007 20:52:03 GMT

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