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Re: WebVTT Horizontal writing direction

From: Philip Jägenstedt <philipj@opera.com>
Date: Thu, 5 Feb 2015 10:11:31 +0700
Message-ID: <CAMQvoCnHsdq6gQN2a-PZoQX2jLnyseevDJs56sA9M2vofV-OCg@mail.gmail.com>
To: Thierry MICHEL <tmichel@w3.org>
Cc: public-tt@w3.org, Silvia Pfeiffer <silviapfeiffer1@gmail.com>
To get RTL you simply use a cue text which is RTL according to the
BiDi algorithm, and you can use &lrm; and &rlm; to where necessary in
mixed-directionality text.

Note, however, that the equivalent to vertical:rl for horizontal text
would be control over which direction additional lines of texts grow,
up or down. We don't have explicit control over that, even though the
cue placement algorithm does move whole cues up or down.


On Wed, Feb 4, 2015 at 11:39 PM, Thierry MICHEL <tmichel@w3.org> wrote:
> 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/
Received on Thursday, 5 February 2015 03:12:00 UTC

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