This has worked relatively well for us except when activities were involved where we had multiple foreground apps. Now the presence of the search bar (which is always visible for practical purposes) is also making this more complicated. The searchBar is part of the system app, but the search app window is not.
If system app does send the search window to background correctly when it is not invoked, is this still an issue? I've given some thought about relying on explicit commands from the system app but it sounds to me as that would be effectively moving the priority assignment logic out of gecko and into gaia. Would that be a good thing? I think that information such as audio playback and wakelock control and system messages is not available there so that would need to be handled in gecko anyway. We are *highly* willing to move the audio competing policy from gecko to gaia… because there is still something needs to be determined by system app but now in gecko we are handling it badly. though even we have better setVisibile API() in https://bugzilla.mozilla.org/show_bug.cgi?id=1034001 I am not sure how difficulty about exposing the wake lock and system message, but please note that system app is also playing an important role on these: * Set mozPower attribute when wake-lock is got in screenManager * Launch related apps required by system message event(open-app) Visibility on the other hand might be better handled in the system app since it's aware of "external" connections between the app such as activity chains. Special-casing apps could also be done better in the system app (note that we recently had problems because the keyboard app changed an attribute name and the priority manager couldn't tell it apart from other apps anymore). For activity chaining, we are doing it by force all apps involved in the chaining to be foreground, and this is definitely not good. Naturally we would need some kind of exposed API to allow the system app to communicate this information to Gecko. Maybe a basic set of priorities associated with an app. I was +1 to this idea from long time ago. get/get Priority/Nice value…or something like that. Thanks for bringing the priority management issue up. Gabriele _______________________________________________ dev-b2g mailing list [email protected] https://lists.mozilla.org/listinfo/dev-b2g
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