W3C home > Mailing lists > Public > public-texttracks@w3.org > April 2013

Re: TextTrackCue contructor API change

From: Simon Pieters <simonp@opera.com>
Date: Wed, 03 Apr 2013 09:42:05 +0200
To: "Silvia Pfeiffer" <silviapfeiffer1@gmail.com>, "Victor Carbune" <victor.carbune@gmail.com>
Cc: "Ian Hickson" <ian@hixie.ch>, "public-texttracks@w3.org" <public-texttracks@w3.org>
Message-ID: <op.wuyfof2fidj3kv@simons-macbook-pro.local>
On Mon, 01 Apr 2013 18:31:24 +0200, Victor Carbune  
<victor.carbune@gmail.com> wrote:

> I would avoid breaking everything that uses TextTrackCue, so I'm curious  
> why
> wouldn't we keep a TextTrackCue constructor with minimal functionality  
> for:
> i) pages making use exclusively of metadata cues
> ii) pages that display videos only with minimal display functionality
> (bottom of the video, centered).
> While for ii) we need to add back the "text" attribute to
> TextTrackCue, i) works with just the attributes and event listeners
> that the TextTrackCue interface offers now.
> The two categories wouldn't make use of any specific features that
> WebVTT, TTML or other formats have to offer.

I'm not sure I like the compromise you suggest above. It seems like it  
would break existing pages in subtle and hard-to-debug ways. If we remove  
the constructor, we break the same pages but in obvious and easy-to-debug  

If we don't want to break the pages at all, we should revert the change  
and let TextTrackCue() create a WebVTT cue, like before. However, I think  
the number of pages that use this constructor is small enough that we can  
break them.

$ grep -rc "TextTrackCue(" ./

Data set: "complete raw data from December 2012 (518 Mb)" from  

Simon Pieters
Opera Software
Received on Wednesday, 3 April 2013 07:42:34 UTC

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