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Re: Printing Support (and workshop) [was: html feature request ]

From: lilley <lilley@afs.mcc.ac.uk>
Date: Sun, 24 Mar 1996 16:59:27 +0000 (GMT)
Message-Id: <6355.9603241659@afs.mcc.ac.uk>
To: marcush@crc.ricoh.com (Marcus E. Hennecke)
Cc: ross@teraflop.com, connolly@beach.w3.org, html-wg@w3.org, www-style@w3.org
> Marcus E. Hennecke writes:

> On Thu, 21 Mar 1996 15:53:17 -0500, "Daniel W. Connolly" 
> <connolly@beach.w3.org> wrote:

> > In message <m0tykTv-000alNC@delta.teraflop.com>, Ross Harvey writes:
> > >	2.	<keep> </keep>, or something, to specify that a section
> > >		of the input not be broken over page boundaries.
 
> > I'd spell it:
> > 
> > 	<div class="keep">...</div>
> > 
> > or perhaps:
> > 
> > 	<div style="keep: true">...</div>

> I'd much rather see
> 
>  	<div style="pagebreak: 3">...</div>
> 
> where the number reflects the degree to which a pagebreak is allowed.

My feeling is that the div idea is good for grouping a small number of
elements which, exceptionally, one wishes to keep together when
printing.

For example, in the absence of FIG one might have:

  <div class="figure">
    <img src="url" class="figure.content">
    <p class="figure.caption">Figure 1: stuff</p>
    <p class="figure.credit">&copy; Chris Lilley</p>
  </div>
  
The associated stylesheet for printing would then specify a keep together 
property for .figure (plus of course any other details such as italic for 
the caption, centering, flow properties, dithering method for greyscale 
printing, and so forth).

I say "a small number" because a request to keep together 5000 lines of 
text cannot be honoured on most printers. The best that could be done, 
when a large amount of text is requested to be kept together, would be to 
start a new page and then let page breaks fall as they will.

I say "exceptionally" because I feel that a better way to handle page
breaks in general is to specify the behaviour of elements or classes in
the printing stylesheet.

Taking a cue from Framemaker, I envisage three CSS1 properties:

  break-before: always | permit | neutral | discourage | never
  break-within: always | permit | neutral | discourage | never
  break-after:  always | permit | neutral | discourage | never
  
For example:

H1, H2 { break-before: permit; break-within: discourage; break-after: never }
P      { break-before: permit; break-within: neutral; break-after: permit }

Div, with appropriate semantic classes, would then be used to override 
these general rules in particular instances - for example to connect a quote 
and it's attribution.

-- 
Chris Lilley, Technical Author and JISC representative to W3C 
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Received on Sunday, 24 March 1996 17:12:16 GMT

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