On Mon, Sep 28, 2015 at 8:09 PM, Michael Terry <[email protected]> wrote: > For the pocket desktop feature, we want to be able to distinguish between > native Touch apps and non-Touch apps, in order to be able to apply different > lifecycle policies to them. > > For example, LibreOffice does not automatically save its state when it loses > focus, as a good Touch app would. So we'd like to warn the user when > exiting pocket desktop mode that they should go save their work. > > Now, whether an app was built for Touch is kind of hard to detect in theory. > Whether it talks the Mir protocol isn't sufficient (could be a GTK app with > the Mir backend). Whether it is a click package isn't sufficient (some > Touch apps like System Settings are debs). At least if it is an Xmir app > instance, we know (those are all non-Touch). > > Ideally, we'd have a metadata flag that indicates whether the app is > designed for Touch and thus opts-into Touch lifecycle handling (or opts-out, > depending on the default). >
One remark: We have to make sure that apps cannot easily use the flag (at least not without a manual reveiw). Otherwise, we would open the door for apps escaping our strict lifecycle. > Thankfully, we already have a flag that looks like it might fit. The > desktop file flag X-Ubuntu-Touch=true is already used in unity-scope-click > to (partly) determine which apps are shown in the App scope [1]. (Is it > used anywhere else?) > > Is that flag suitable for repurposing to this use case? Any objections if I > use that to determine whether an app was written for Touch or not? > In general: yes. I would like to see the proposal refined for my remark before, though. Thanks, Thomas > (We might then need to do something to make sure that LibreOffice also shows > up in the App scope *without* setting the above flag. But that's > manageable.) > > [1] > http://bazaar.launchpad.net/~ubuntuone-control-tower/unity-scope-click/trunk/view/head:/libclickscope/click/interface.cpp#L274 > > -- > -mt > > -- > Mailing list: https://launchpad.net/~ubuntu-phone > Post to : [email protected] > Unsubscribe : https://launchpad.net/~ubuntu-phone > More help : https://help.launchpad.net/ListHelp > -- Mailing list: https://launchpad.net/~ubuntu-phone Post to : [email protected] Unsubscribe : https://launchpad.net/~ubuntu-phone More help : https://help.launchpad.net/ListHelp
