[Dev] Changing sleep bahaviour in Tizen 3 for HTML5 Apps

Counihan, Tom tom.counihan at intel.com
Thu Aug 28 18:59:02 GMT 2014


Hi Art,

I’m curious to know,  have Jag formulated any opinion as to how much business logic you expect written is js, vs. pushing down the stack?

Warm Regards

Tom.

From: Dev [mailto:dev-bounces at lists.tizen.org] On Behalf Of McGee, Art
Sent: Thursday, August 28, 2014 4:09 PM
To: Dominig ar Foll
Cc: dev at lists.tizen.org
Subject: Re: [Dev] Changing sleep bahaviour in Tizen 3 for HTML5 Apps

Hello,

Here is my take on this.   Lets assume for a minute that the MediaPlayer would halve to be running to keep the music playing.  This would indeed require that when it goes to the background it keep running or music would be lost.  I would suggest having optional event handlers in the JavaScript that would allow apps to deny sleep mode or request a working level of sleep.  Maybe the app would request that it continues to have access to media controls.

But here is the other halve.  The MediaPlayer isn't required for the media to be playing.  The Media playback would be handled by a Native background process that would only be directed by MediaPlayer.  There is no need for MediaPlayer to be active if the playlist is set and the music will just keep playing.

I'm sure a lot more thought could go into this but I think of the web app to be only active when a user is using it.  I would be interested in any arguments that would require the web app to be active when the user isn't interacting with it.  I believe most of this could be handled with useful event handlers.

Thanks,

Art McGee
Jaguar Landrover

On 28 August 2014 02:31, Dominig ar Foll <dominig.arfoll at fridu.net<mailto:dominig.arfoll at fridu.net>> wrote:
Hello,

I received recently an email remaining me that in Tizen 2.x when an App
was not visible it was to be forced to sleep mode (see bellow signature
the exact pointer in the doc).

In Tizen 3 we have Profiles (in particular IVI) which offers HTML5 as
the main development toolkit and assume that any application (including
platform Apps) can be written in HTML5.
As no one will accept to see the music player go to sleep (and stop
playing any music) as soon as a the GPS will take over the screen to
display a map or a TV stop to play live channel in a PiP when the
program guide is displayed.

In short the 2.2 model which assumes that by default an HTML5 will be
put to sleep when not visible cannot be assumed any more in Tizen 3.

There is a proposition to handle the new mode which can found here :

https://docs.google.com/a/fridu.net/document/d/10L9aHQHwl5xXNwNAmn3V9T7pkbdd5DqOWDlBwJxvoGA/edit?pli=1#heading=h.kz53whwjuj98

Feedback on this new model is welcome.

Regards


--
Dominig ar Foll
Senior Software Architect
Intel Open Source Technology Centre


According to Tizen core spec,
https://source.tizen.org/sites/default/files/page/tizen-2.2-wrt-core-spec.pdf,
the 0320 section said: The WRT MUST suspend JavaScript execution and
rendering (including CSS animations) when the Web Application enters an
invisible state. Means that a web application should be changed to
suspend status when hiding. But I've noticed that a new Tizen app
framework design:

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--
Art McGee
Infotainment Engineer
Jaguar Land Rover
1419 NW 14th Ave, Portland, Oregon, 97209

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