Re: Padding on tt:p and tt:span elements

Will there be an entry in the tracker for this?

In addition I attach an html-example that shows the wished behaviour and 
a CSS definition that is similiar to the needed TTML styles.

Best regards,

Andreas

Am 25.04.2012 21:56, schrieb Sean Hayes:
>
> While what you say is true it is very inconvenient from an authoring 
> perspective, and if the user can set the font (which is a requirement 
> of the FCC rules), then you need the region to be able to adapt. 
> Better to use the <p> background which does adapt naturally. You can 
> artificially introduce the padding using spans with preserved space, 
> however this is a pretty ugly hack. I think it makes sense to allow 
> padding on these elements.
>
> *From:*Glenn Adams [mailto:glenn@skynav.com]
> *Sent:* 25 April 2012 17:04
> *To:* John Birch
> *Cc:* tai@irt.de; public-tt@w3.org
> *Subject:* Re: Padding on tt:p and tt:span elements
>
> On Wed, Apr 25, 2012 at 9:33 AM, John Birch 
> <John.Birch@screensystems.tv <mailto:John.Birch@screensystems.tv>> wrote:
>
> You hit the nail on the head. Font size at authoring time is only true 
> if font exists at browser... Otherwise substitution means all bets are 
> off.
>
> not quite; you can always overestimate the size which permits 
> containment without overflow
>
>     Best regards,
>     John
>
>     *From*: Glenn Adams [mailto:glenn@skynav.com
>     <mailto:glenn@skynav.com>]
>     *Sent*: Wednesday, April 25, 2012 04:00 PM
>     *To*: John Birch
>     *Cc*: Andreas Tai <tai@irt.de <mailto:tai@irt.de>>; public-tt
>     <public-tt@w3.org <mailto:public-tt@w3.org>>
>     *Subject*: Re: Padding on tt:p and tt:span elements
>
>     On Wed, Apr 25, 2012 at 5:22 AM, John Birch
>     <John.Birch@screensystems.tv <mailto:John.Birch@screensystems.tv>>
>     wrote:
>
>     In TTML as I understand it(as a result of derivation from
>     xsl:fo?), there is no possible mechanism that can *set* the region
>     size as a result of a calculation of the *rendered* text size on
>     the display. In contrast to broadcast practises, in TTML the text
>     is fitted inside a predefined region (or overflows / clips),
>     rather than the region (growing) fitting the text.
>
>     it can, if the size can be determined at authoring time; but that
>     will depend on font usage; so you are correct that if the font
>     size is unknown, then you may have to overestimate the size, e.g.,
>     by using em or c length units
>
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