Nickname:
Title:
State: RAISED OPEN PENDINGREVIEW CLOSED POSTPONED
Product: None TTML 1.0 TTML 1.0 (Editorial) TTML 1.0 Test Suite TTML IMSC 1.0 TTML IMSC 1.1 TTML IMSC 2.0 TTML Simple Delivery Profile for Closed Captions (US) TTML versions and profiles note TTML WebVTT mapping note TTML.next TTML2 WebVTT 1.0 WebVTT.next
Raised By: Glenn Adams John Birch Eric Carlson Cyril Concolato Frans de Jong Hemant Desai Mike Dolan Jean-Pierre EVAIN Chris Flick Sayali Godbole Glenn Goldstein Loretta Guarino Reid Ken Harrenstien Gary Katsevman Philippe Le Hégaret Pierre-Anthony Lemieux Vladimir Levantovsky Kasar Masood Nigel Megitt Thierry Michel shingo mine Theresa O'Connor Silvia Pfeiffer Stefan Pöschel Rohit Puri David Ronca David Singer Harold Sutherland Andreas Tai Sean Hayes
Description: 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> 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] Sent: Wednesday, April 25, 2012 04:00 PM To: John Birch Cc: Andreas Tai <tai@irt.de>; public-tt <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> 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 On Tue, Apr 24, 2012 at 1:41 AM, Andreas Tai <tai@irt.de> wrote: As in TTML a region has always a predefined size, tt:p- and tt:span elements are the better choices to apply a non-transparent background color on a subtitle block that dynamically grows and shrinks with the corresponding text. I'm not sure I understand what you mean by "has always a predefined size". If by this you mean the "same" size, then I would not agree. A region's size (extent) can be changed at any time by using <tt:set>. Unfortunately padding cannot be applied to tt:p and tt:span elements and the very common use case to have empty space between text and the border of a centered "text box" with dynamic width is hard to implement (for an illustration of two use cases see the attached images). Therefore the EBU-Working group that specifies the TTML subset EBU-TT sees the requirements to add padding as an applicable style property for the tt:p and tt:span elements. Best regards, Andreas ---------- As in TTML a region has always a predefined size, tt:p- and tt:span elements are the better choices to apply a non-transparent background color on a subtitle block that dynamically grows and shrinks with the corresponding text. Unfortunately padding cannot be applied to tt:p and tt:span elements and the very common use case to have empty space between text and the border of a centered "text box" with dynamic width is hard to implement (for an illustration of two use cases see the attached images). Therefore the EBU-Working group that specifies the TTML subset EBU-TT sees the requirements to add padding as an applicable style property for the tt:p and tt:span elements. Best regards, Andreas
Add notes (no markup allowed, URIs get automatically hyperlinked):
changing this to a TTML.next issue, since tt:p and tt:span don't support padding in 1.0
Implemented. https://dvcs.w3.org/hg/ttml/rev/edf3344d2924 Support application of padding to all content elements (except br).