Re: XP> [CSS3 Paged Media] Page collapsing

From: Atsushi Nakamura (nakamura.atsushi318@canon.co.jp)
Date: Thu Sep 28 2006 - 02:23:54 EDT

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    Melinda,

    I apologize in my delay catching up on this subject,
    but Canon believes authors that accumulate multiple page-break-* properties
    will do this with intent.
    Collapsing valid properties is something we have not seen before, and seems
    something odd to do.

    Regards,
    Atsushi Nakamura
    Canon

    Grant, Melinda wrote:
    > The CSS Paged Media specification
    > (http://www.w3.org/TR/2004/CR-css3-page-20040225/) is currently unclear
    > as to what should happen when multiple page-break-* properties
    > accumulate. The spec is clear that a :left or :right pseudo-class can
    > require that a blank page or surface is generated.
    >
    > For example:
    >
    > <p>This is a paragraph on page 1.</p>
    > <div style="page-break-before">
    > <div style="page-break-before">
    > The first div causes a page break; does the second div cause
    > another page break, putting this content on page 3, or are the page
    > breaks collapsed into a single page break so that this is printed on
    > page 2?</div>
    > </div>
    >
    > Or:
    >
    > <body>
    > <p> I am printed on the first page.</p>
    > <div style="page-break-after:always">
    > <div style="page-break-after:always">
    > <div style="page-break-after:always">
    > <div style="page-break-after:always">
    > <div style="page-break-after:always"> I am also printed on the
    > first page.
    > </div>
    > </div>
    > </div>
    > </div>
    > </div>
    > <p>Where am I printed?</p>
    > </body>
    >
    > Or:
    >
    > <body>
    > <p style="page-break-after">This is a paragraph on page 1.</p>
    > <div style="page-break-before">
    > The p generated a page break; does the div cause another page
    > break, putting this content on page 3, or are the page breaks collapsed
    > into a single page break so that this is printed on page 2?
    > </div>
    > </body>
    >
    > Different implementations behave differently, as might be expected. I
    > would like to tighten up the spec to require that page-break properties
    > collapse such that no empty pages or surfaces are generated except for
    > one when needed to get to the next right- or left-facing page. Authors
    > can use other means to create blank pages. This will make results more
    > interoperable.
    >
    > (I do not yet have consensus from the CSS WG to make this change. Most
    > implementations collapse pages, but Opera's does not, and they may not
    > be willing to accept the change.)
    >
    > If you wish to object to this proposed clarification or express support,
    > please do so by posting a response here or to www-style@w3.org
    > <mailto:www-style@w3.org> by September 23.
    >
    > Best wishes,
    >
    > Melinda
    > _____
    >
    > HP - Melinda Grant
    > Connectivity Standards
    > Consumer Printing and Imaging
    > +1 (541) 582-3681
    > melinda.grant@hp.com
    > _____
    >
    > 

    -- 
Atsushi Nakamura
Senior Engineer
Inkjet Device Firmware Design 31
Canon, Inc.
3-451 Tsukagoshi Saiwai-Ku
Kawasaki JAPAN
212-8530

    Tel : 81-44-542-2111 ext3713
       81-44-548-7538 direct(shared)

    E-mail : nakamura.atsushi318@canon.co.jp
--

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