[webvtt] Native controls cue overlap avoidance works badly for vertical

zcorpan has just created a new issue for 
https://github.com/w3c/webvtt:

== Native controls cue overlap avoidance works badly for vertical ==
https://w3c.github.io/webvtt/#processing-model

> If the user agent is exposing a user interface for video, add to 
output one or more completely transparent positioned CSS block boxes 
that cover the same region as the user interface\.

Most desktop browsers at least have a horizontal controls bar at the 
bottom of the video, showing and hiding based on hover and paused 
state. This works fine for horizontal cues. But for vertical cues, 
assuming the default size:100%, it means they don't fit anywhere.

I suppose it's similar if you have a horizontal cue and a vertical cue
 active at the same time, which is not unreasonable if you have e.g. 
English and vertical Japanese tracks both activated.

https://zcorpan.github.io/live-webvtt-viewer/#vtt=WEBVTT%0A%0A00%3A00%3A00.001+--%3E+00%3A00%3A10.000%0AHorizontal+1%0A%0A00%3A00%3A00.000+--%3E+00%3A00%3A10.000+vertical%3Alr+size%3A100%25%0AVertical+1%0A%0A00%3A00%3A01.000+--%3E+00%3A00%3A10.000%0AHorizontal+2

Please view or discuss this issue at 
https://github.com/w3c/webvtt/issues/276 using your GitHub account

Received on Tuesday, 1 December 2015 05:39:38 UTC