Re: Fwd: WebVTT Horizontal writing direction

On Wed, 04 Feb 2015 20:34:36 +0100, David Singer <singer@apple.com> wrote:

>
>
>> Begin forwarded message:
>>
>> Date: February 4, 2015 at 08:39:58 PST
>> From: Thierry MICHEL <tmichel@w3.org>
>> To: public-tt@w3.org, 'Silvia Pfeiffer' <silviapfeiffer1@gmail.com>
>> Subject: WebVTT Horizontal writing direction
>> Archived-At: <http://www.w3.org/mid/54D24B5E.7060102@w3.org>
>> Resent-From: public-tt@w3.org
>>
>> Hi,
>>
>> WebVTT lastest draft [1]
>> http://www.w3.org/TR/2014/WD-webvtt1-20141113/
>> specifies the WebVTT vertical text cue setting
>>
>> A WebVTT vertical text cue setting configures the cue to use vertical  
>> text layout rather than horizontal text layout. Vertical text layout is  
>> sometimes used in Japanese, for example. The default is horizontal  
>> layout.
>>
>> vertical values:
>> - vertical:rl  writing direction is right to left
>> - vertical:lr  writing direction is left to right
>>
>>
>> My issue is how can one set writing direction  "right to left" for  
>> horizontal text ? (example of arabic lang)
>> I couldn't find explicit mention in the spec.
>> like:
>> - horizontal:rl  writing direction is right to left
>> - horizontal:lr  writing direction is left to right
>>
>>
>> Thierry
>>
>> [1] http://www.w3.org/TR/2014/WD-webvtt1-20141113/

WebVTT determines the direction of a cue using "Unicode Bidirectional  
Algorithm's Paragraph Level steps".

http://dev.w3.org/html5/webvtt/#h4_processing-model

step 14.3.3.

So arabic should just work. It can also be explicitly set with &lrm; or  
&rlm; at the start of the cue text.

-- 
Simon Pieters
Opera Software

Received on Thursday, 5 February 2015 07:47:53 UTC