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Re: [css3-gcpm] Running elements

From: Cramer, Dave <Dave.Cramer@hbgusa.com>
Date: Wed, 2 Oct 2013 11:39:56 -0400
To: Brad Kemper <brad.kemper@gmail.com>, Håkon Wium Lie <howcome@opera.com>
CC: "www-style@w3.org" <www-style@w3.org>
Message-ID: <CE71B476.3D243%david.cramer@hbgusa.com>
On 9/26/13 12:09 PM, "Brad Kemper" <brad.kemper@gmail.com> wrote:


>> On Sep 25, 2013, at 11:58 AM, Håkon Wium Lie <howcome@opera.com> wrote:
>>
>>
>>
>>  title { position: running(header), normal }
>>  @page { @top-center {
>>    content: element(header) }
>>  }
>>
>> I'm happy to resurrect the feature, though -- it's very useful.
>> Changing 'position' to take a comma-separated list is a big deal and
>> there may be better ways to achieve the same.
>
>It feels kind of strange to me to be using the 'position' property to get
>running headers. I think it would be more natural to extend the
>properties used for regions, which already do a lot of similar things.
>So, for instance, if the element is to be moved, not copied, then
>something like this:
>
>title { flow-into: header running }
> @page { @top-center {
>   flow-from: header;
>   }
> }
>
>Thus the "running" keyword would mean that the flow repeats on each page
>(like a header or footer) instead of flowing from page to page (like
>footnotes might), and that anything else with 'flow-into: header' (with
>or without the "running" keyword) would replace the existing 'header'
>flow. You could also add your 'element()' second arguments to
>'flow-from', like this:
>
>   flow-from: header first-except;
>
>Those second arguments could be useful even if it wasn't a running flow.
>
>Then, for Dave's use case, where the element is to be copied, not moved,
>we'd use a 'running-copy' keyword, instead of just 'running':
>
>title { flow-into: header running-copy }
>
>This to me feels right. It leverages what people would already know about
>flow-into and flow-from, styling with @region or ::region(), etc.
>
>I'd like to use '::before' on the margin boxes, to pick up some of the
>string content ideas (note that the regions draft already allows the
>'content' keyword in the 'flow-into' value):
>
>title {
>  flow-into: HEADER content running;
>  counter-increment: header;
>}
> @page { @top-center {
>   flow-from: HEADER;
>   }
>@top-center::before {
>   content: "Chapter " counter(header) ": ";
>   }
> }
>
>This feels simpler and easier, and more consistent with region syntax,
>than the current or past gcpm equivalents.

That makes sense to me. And Prince is already using the idea of "flow" to
move content into margin boxes; I hope they'll update this to use the
regions syntax (plus the ability to copy a flow).

Dave


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Received on Wednesday, 2 October 2013 15:40:28 UTC

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