Why does the package name get used to determine if a window gets displayed? 
What policy do you really want to enforce? There has got to be a less 
convoluted way to get what you want than this.


From: Dev [mailto:[email protected]] On Behalf Of Manuel Bachmann
Sent: Wednesday, November 26, 2014 5:10 AM
To: [email protected]
Subject: [Dev] [RFC] AUL UI request for multi-process applications 
(ICO/Crosswalk...)

Hi folks,
This RFC is about bug TC-1691, TC-159...

(The problem happens with Crosswalk today, but it could happen with any other 
application)
AUL provide somes function calls, like  "aul_app_get_pkgname_bypid ()", which 
permit to get the application package name associated with a running PID.
Under IVI, the ICO Homescreen (profile/ivi/ico-uxf-homescreen) uses these calls 
to determine if it should show a window, by getting the PID of its process, and 
then comparing it will the package name. If if does not match, the window stays 
hidden.

The problem is :
In Crosswalk, the process which creates the window (the GPU process)  is *not* 
the same that the one (the browser process) which registers itself as a Tizen 
application.
Crosswalk has a dedicated process for UI operations, which is different of the 
one that does the application logic.
So, the name is never found, and Web applications never show.

In this respect, we need a way for an application to "pass" its application 
identifier to the graphical layer (in this case, ICO).Here are 2 options :

1) in Crosswalk itself, have a package name passed from application layer to 
the UI/GPU one (won't probably be upstream). Then, have a Weston plugin 
"receive" and store the information. When requested by the 
"aul_app_get_pkgname_bypid ()" call, AUL will also request the plugin for this 
information and respond.
 Requires modifications in : 3 packages (crosswalk, weston, aul-1)

2) in Crosswalk itself, have a package name passed from application layer to 
the UI/GPU one (won't probably be upstream). Then, store this data in a local 
database or specific tmpfs.  When requested by the "aul_app_get_pkgname_bypid 
()" call, AUL will also request this base or tmpfs for this information and 
respond.
 Requires modification in : 2 packages (crosswalk, aul-1)

The 2nd idea modifies less packages but may be trickier to implement. Any 
opinion on this ?


--
Regards,

Manuel BACHMANN
Tizen Project
VANNES-FR
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