Re: How to filter available screens according to the content being presented (issue #9)

Hi Mark, 

Could you give any use case of why UA needs to filter screens regarding to requested URL? 

Thanks, 
Sincerely yours. 
----- Original Message -----

From: "Mark Watson" <watsonm@netflix.com> 
To: public-webscreens@w3.org 
Sent: Thursday, September 11, 2014 2:03:24 AM 
Subject: How to filter available screens according to the content being presented (issue #9) 

All, 

This issue is all about ensuring that the user is not presented with a "present" icon which, when clicked, does nothing because there are in fact no available screens supporting the content. 

The issue suggests one approach, whereby the UA can be instructed to filter the available screens to those supporting specific provided URLs. 

Another approach would be to provide a new method: 

Promise<bool> canRequestSession( DOMString url ); 

This would take exactly the same parameters as requestSession, but rather than prompting the user it would return a prediction of whether there would be any screens to prompt the user with. The application could avoid showing the "present" icon if there are in fact no suitable screens. 

...Mark