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Re: [css3-gcpm] bookmark-label: keyword definitions and whitespace processing

From: Simon Sapin <simon.sapin@kozea.fr>
Date: Mon, 20 Aug 2012 14:10:12 +0200
Message-ID: <50322924.5070007@kozea.fr>
To: Håkon Wium Lie <howcome@opera.com>
CC: "www-style@w3.org" <www-style@w3.org>
Le 18/08/2012 00:21, Håkon Wium Lie a écrit :
>   > You mention below that h1..h6 get a bookmark-label value in the HTML UA
>   > stylesheet. I think it’s hard to generate a bookmark if bookmark-level
>   > is none. Where would you put it in a PDF outline tree, for example?
>
> It could be level 1. (In which case we might as well make the initial
> value 1 instead of none.)
>
> Or we could say that, in order for a bookmark to be generated, both
> 'bookmark-level' and 'bookmark-label' must be different from 'none'.
>
> This will allow UAs and authors to use any switch they want, no?


Yes, "generate a bookmark iff both are different from none" would be 
fine. Other variants could work too but my initial point was that the 
spec should say which combinations of value generate a bookmark or not.


> I could see the value of 'white-space' change for effect in the
> document without wanting a similars effect in the outline (where space
> is more precious). So, I suggest adding this to the definition of <content-list>:
>
>    The textual content is processed as if 'white-space: normal' had been set.

Ok.


>   > >   > The bookmark "target" is a single point. We picked the before-start
>   > >   > corner (top-left in horizontal-tb ltr) of the margin edge of the first
>   > >   > box/fragment generated by the element.
>
> What do you suggest the spec should say? (if anything)

It could say something similar to the HTML5 spec for internal 
hyperlinks, or just reference it directly.

http://www.w3.org/TR/html5/history.html#scroll-to-fragid:
> When the user agent is required to scroll to the fragment identifier,
> it must either change the scrolling position of the document using
> the scroll an element into view algorithm defined in the CSSOM View
> specification, with the align to top flag set, or perform some other
> action, such that the indicated part of the document is brought to
> the user's attention. If there is no indicated part, or if the
> indicated part is not being rendered, then the user agent must not
> scroll anywhere. [CSSOMVIEW]

This, in turn, references CSSOM View:
http://dev.w3.org/csswg/cssom-view/#scroll-an-element-into-view

(There may not be an ID on a bookmark target, so the wording may need to 
be tweaked a little.)


Also, the Value line of bookmark-label is now:
     [ <content-list> ]+ | none

<content-list> is already a list, so the + repeater is not needed:
     <content-list> | none

-- 
Simon Sapin
Received on Monday, 20 August 2012 12:10:39 GMT

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