W3C home > Mailing lists > Public > public-texttracks@w3.org > May 2012

Re: Displaying multiple lines in WebVTT

From: Simon Pieters <simonp@opera.com>
Date: Wed, 02 May 2012 08:46:31 +0200
To: "Glenn Maynard" <glenn@zewt.org>, "Ian Hickson" <ian@hixie.ch>
Cc: "Silvia Pfeiffer" <silviapfeiffer1@gmail.com>, Philip J├Ągenstedt <philipj@opera.com>, "public-texttracks@w3.org" <public-texttracks@w3.org>
Message-ID: <op.wdn43tpmidj3kv@simons-macbook-pro.local>
On Tue, 01 May 2012 07:42:25 +0200, Ian Hickson <ian@hixie.ch> wrote:

>> As an aside: do the rendering rules say what happens if the style of
>> cues is changed by script (or the UA, too, I suppose), causing it to
>> change size (spans losing display: none, changing font size, etc)?
> Yes. Nothing happens to the boxes, but the resulting rendering would
> change. I expect this will change based on implementor feedback.

'display' and 'font-size' is not in the list of properties that apply to  
::cue or ::cue(). So 'display' cannot change. I think the only way  
'font-size' can change is if the user changes the minimal font size  
setting (if it applies to cues, which I think it should) or has it set and  
the size of the video changes.

>> I havn't fully parsed out the rendering rules (so this may not make
>> sense), but it seems like it would need to trigger "reset" in the
>> rendering rules (or clear the text track cue display state) so the cues
>> are laid out from scratch.
> That's a possible way it might change. Doing that is awkward because we
> would have to define precisely what is to be considered a style sheet
> change that should trigger a reset. It would be unfortunate if someone
> tweaking a colour being animated in a completely non-video-related cue
> caused subtitles to keep jumping around.

Simon Pieters
Opera Software
Received on Wednesday, 2 May 2012 06:47:16 UTC

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