I was just looking at this bug, and to the BAMF code related to this
issue, and this is somewhat that is also related to the bug #692462
(also if here there's a little more complexity due to the fact that each
.exe app needs the wine loader to be launched).
To fix correctly these bug we should basically use the same strategy: if two
windows have the same tuple (WM_CLASS res, WM_CLASS name), then they belongs to
the same application (of course there could be some extra checks, but basically
this can be considered valid here). In fact while a chromium app window has the
WM_CLASS composed by the tuple ("page_address", "Chromium-browser"), any window
application has the WM_CLASS set by ("process_launched.exe", "Wine").
So, if the first value of the WM_CLASS tuple, called wm_class resource, doesn't
match, then we've a different application (=> different unity icon).
This is quite easy to do from our side (except solving some dbus
inconsistencies). However, the main problem is that libwnck doesn't follow the
ICCCM standard [1] correctly and so it exports just the WM_CLASS class (called
res_class), but it doesn't export at all the res_name, that is the thing that
would make differ, for example, two wine applications, from the X property
point of view! That's one of the reasons, right now, why BAMF sees two wine
applications like the same app.
This libwnck issue was already reported years ago in the GNOME bugzilla (with
patch), but wasn't ever applied [2].
So, now, to fix this bug I don't really know if it's the case to press
the libwnck team to fix their bug, or if we should instead (waiting
them) to provide a working alternative to retrieve correctly these
WM_CLASS values (basically the class resource).
[1] http://tronche.com/gui/x/icccm/sec-4.html#WM_CLASS
[2] https://bugzilla.gnome.org/show_bug.cgi?id=168718
** Bug watch added: GNOME Bug Tracker #168718
https://bugzilla.gnome.org/show_bug.cgi?id=168718
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https://bugs.launchpad.net/bugs/702452
Title:
[launcher] Wine applications are wrongly matched
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