Re: [selectors3 / 4] Cross element pseudo-elements

From: "Giovanni Campagna" <scampa.giovanni@gmail.com>
> The 8th of April has passed and the biggest issue with Selectors Level
> 3 (outside Unicode Normalization) that I found in the group wiki is
> the handling of ::first-line. So I would like to show my proposal,
> that tries to generalize the solution. Some of this probably belongs
> to Selectors Level 4, though.
> The problem is fundamentally that ::first-line does not select a box,
> it selects a sequence of text, which may cross box boundaries. This is
> the same problems we had with ::selection, for example. In fact, this
> applies to ::first-line, ::last-line, ::nth-line(an+b), ::selection,
> ::text(regexp,n), ::first-letter, etc.
> 
> My proposal regards the processing model for "formatting
> pseudo-elements" (all the above). I included some examples to make it
> clearer, using ::selection because this is more likely to cross
> elements, but any pseudo-element in principle can be used. I used
> selectors to refer to blocks (and I assume that multiple declarations
> in the same block are early collapsed)
>
> [...]

To see if I've understood you :

Imagine the following markup :

    <style><!--
        .note::before {
            content: 'Note: ';
        }

        .note::selection {
            // ...
        }
    --></style>
    
    <div class="note">
        You <strong>should</should> not use this property unless
        the context makes it necessary.
    </div>

And imagine I've selected the words 'Note: You should not'

It will result, in the browser as :

    <div class="note">
    
        <::before>
            <::selection>Note: </::selection>
        </::before>
    
        <::selection>You </::selection>
    
        <strong>
            <::selection>should</::selection>
        </strong
    
        <::selection> not</::selection>
    
        use this property unless the context makes it necessary.
    
    </div>

Or as :

    <div class="note">
    
        <::selection>
    
            <::before>
                <::selection>Note: </::selection>
            </::before>
        
            You
        
            <strong>
                <::selection>should</::selection>
            </strong
        
            not
    
        </::selection>
    
        use this property unless the context makes it necessary.
    
    </div>

Regards,
Fremy

Received on Tuesday, 14 April 2009 14:12:56 UTC