Trash monitor queries info from gvfsd-trash after each file monitor
change which can be problematic when too many changes happen in
a short time. Let's rate limit the number of queries...
Fixes: #1010
The trash is monitored for state changes - going from empty to non-empty and the
other way round. Monitoring is done by handling change signals from a regular
file monitor. On each signal, an enumeration of the trash contents is started in
order to see if it is empty or not. This causes issues when many files are
trashed, because the gvfs trash backend is flooded with enumeration requests,
resulting in CPU usage spikes. In order to fix this, the "item-count" attribute
of the trash should be queried instead.
Replace asynchronous enumeration with asynchronous information query and update
the trash state based on the "item-count" attribute. Emit state change signal
only when the state actually changes.
https://bugzilla.gnome.org/show_bug.cgi?id=763600
There is no GNU Lesser General Public License version 2; it's either GNU
Library General Public License version 2, or GNU Lesser General Public
License version 2.1.
This is analogous to NautilusTrashMonitor in that it just monitors trash:///
and is able to return the appropriate icon for the trash's current state.
Later we may want to move this utility object into GIO or something.
Signed-off-by: Federico Mena Quintero <federico@gnome.org>
