- From: Pierre-Anthony Lemieux via GitHub <sysbot+gh@w3.org>
- Date: Fri, 10 Nov 2017 23:10:14 +0000
- To: public-css-archive@w3.org
palemieux has just created a new issue for https://github.com/w3c/csswg-drafts: == Support multiRowAlign == _Per the 20171109 joint TTWG/CSS meeting_ As illustrated at [multiRowAlign.pdf](https://github.com/w3c/csswg-drafts/files/1462969/multiRowAlign.pdf) and specified at https://tech.ebu.ch/docs/tech/tech3380.pdf, a common captioning style requires the author to control the alignment of lines relative to the longest line within a block. This styling capability is not currently supported by CSS. See https://codepen.io/palemieux/pen/yVxZWm . Region 2 illustrate the intended result of centering the longest line and right-aligning other lines relative to the right edge of the longest line. This capability mirrors the `ebutts:multiRowAlign` styling attribute at https://www.w3.org/TR/ttml-imsc1.0.1/#multiRowAlign, which is demonstrated in the following sample document, which can be rendered at http://sandflow.com/imsc1proc/index.html . ``` <?xml version="1.0" encoding="UTF-8"?> <tt xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.w3.org/ns/ttml" xmlns:ttp="http://www.w3.org/ns/ttml#parameter" xmlns:tts="http://www.w3.org/ns/ttml#styling" xmlns:ttm="http://www.w3.org/ns/ttml#metadata" xmlns:ebutts="urn:ebu:tt:style" xml:lang="en" ttp:timeBase="media" xmlns:ebuttm="urn:ebu:tt:metadata" > <head> <metadata> <ebuttm:documentMetadata> <ebuttm:conformsToStandard>urn:ebu:tt:distribution:2014-01</ebuttm:conformsToStandard> <ebuttm:conformsToStandard>http://www.w3.org/ns/ttml/profile/imsc1/text</ebuttm:conformsToStandard> </ebuttm:documentMetadata> </metadata> <styling> <style xml:id="baseStyle" tts:color="#FFFFFF" tts:lineHeight="100%"/> <style xml:id="blackBackground" tts:backgroundColor="#000000"/> <style xml:id="greenBackground" tts:backgroundColor="#00FF00"/> <style xml:id="startEnd" tts:textAlign="start" ebutts:multiRowAlign="end"/> <style xml:id="centerStart" tts:textAlign="center" ebutts:multiRowAlign="start"/> </styling> <layout> <region xml:id="area1" tts:origin="15% 10%" tts:extent="70% 20%" style="greenBackground" tts:displayAlign="center"/> <region xml:id="area2" tts:origin="15% 70%" tts:extent="70% 20%" style="blackBackground" tts:displayAlign="center"/> </layout> </head> <body> <div style="baseStyle"> <p xml:id="s1" region="area1" style="startEnd" begin="00:00:01" end="00:00:09"> multiRowAlign="end"<br/>textAlign="start" </p> <p xml:id="s2" region="area2" style="centerStart" begin="00:00:01" end="00:00:09"> multiRowAlign="start"<br/>textAlign="center" </p> </div> </body> </tt> ``` Please view or discuss this issue at https://github.com/w3c/csswg-drafts/issues/1975 using your GitHub account
Received on Friday, 10 November 2017 23:10:16 UTC