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/* ds-registry.vala
*
* Copyright © 2011 Collabora Ltd.
* By Siegfried-Angel Gevatter Pujals <siegfried@gevatter.com>
* Copyright © 2011 Michal Hruby <michal.mhr@gmail.com>
*
* Based upon a Python implementation (2009-2011) by:
* Mikkel Kamstrup Erlandsen <mikkel.kamstrup@gmail.com>
* Manish Sinha <manishsinha@ubuntu.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 2.1 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
namespace Zeitgeist
{
[DBus (name = "org.gnome.zeitgeist.Blacklist")]
public interface RemoteBlacklist: Object
{
public abstract void add_template (string template_id,
[DBus (signature = "(asaasay)")] Variant event_template)
throws Error;
[DBus (signature = "a{s(asaasay)}")]
public abstract Variant get_templates () throws Error;
public abstract void remove_template (string template_id)
throws Error;
public signal void template_added (string template_id,
[DBus (signature = "(asaasay)")] Variant event_template);
public signal void template_removed (string template_id,
[DBus (signature = "(asassay)")] Variant event_template);
}
namespace BlacklistTemplates
{
private const string SIG_BLACKLIST = "a{s("+Utils.SIG_EVENT+")}";
private static HashTable<string, Event> from_variant (
Variant templates_variant)
{
var blacklist = new HashTable<string, Event> (str_hash, str_equal);
warn_if_fail (
templates_variant.get_type_string () == SIG_BLACKLIST);
foreach (Variant template_variant in templates_variant)
{
VariantIter iter = template_variant.iterator ();
string template_id = iter.next_value ().get_string ();
// FIXME: throw exception upon error instead of aborting
Event template = new Event.from_variant (iter.next_value ());
blacklist.insert (template_id, template);
}
return blacklist;
}
public static Variant to_variant (HashTable<string, Event> blacklist)
{
var vb = new VariantBuilder (new VariantType (SIG_BLACKLIST));
{
var iter = HashTableIter<string, Event> (blacklist);
string template_id;
Event event_template;
while (iter.next (out template_id, out event_template))
{
vb.open (new VariantType ("{s("+Utils.SIG_EVENT+")}"));
vb.add ("s", template_id);
vb.add_value (event_template.to_variant ());
vb.close ();
}
}
return vb.end ();
}
}
class Blacklist: Extension, RemoteBlacklist
{
private HashTable<string, Event> blacklist;
private uint registration_id;
Blacklist ()
{
Object ();
}
construct
{
// Restore previous blacklist from database, or create an empty one
Variant? templates = retrieve_config ("blacklist",
BlacklistTemplates.SIG_BLACKLIST);
if (templates != null)
blacklist = BlacklistTemplates.from_variant (templates);
else
blacklist = new HashTable<string, Event> (str_hash, str_equal);
// This will be called after bus is acquired, so it shouldn't block
try
{
var connection = Bus.get_sync (BusType.SESSION, null);
registration_id = connection.register_object<RemoteBlacklist> (
"/org/gnome/zeitgeist/blacklist", this);
}
catch (Error err)
{
warning ("%s", err.message);
}
}
public override void unload ()
{
try
{
var connection = Bus.get_sync (BusType.SESSION, null);
if (registration_id != 0)
{
connection.unregister_object (registration_id);
registration_id = 0;
}
}
catch (Error err)
{
warning ("%s", err.message);
}
debug ("%s, this.ref_count = %u", Log.METHOD, this.ref_count);
}
private void flush ()
{
Variant v = BlacklistTemplates.to_variant (blacklist);
store_config ("blacklist", v);
}
public override void pre_insert_events (GenericArray<Event?> events,
BusName? sender)
{
for (int i = 0; i < events.length; i++)
{
if (events[i] == null) continue;
foreach (var tmpl in blacklist.get_values ())
{
if (events[i].matches_template (tmpl))
{
events[i] = null;
break;
}
}
}
}
public void add_template (string template_id, Variant event_template)
throws EngineError
{
Event template = new Event.from_variant (event_template);
blacklist.insert (template_id, template);
debug ("Added blacklist template: [#%u]", template_id.hash ());
template_added (template_id, event_template);
flush ();
}
public void remove_template (string template_id)
{
Event event_template = blacklist.lookup (template_id);
if (blacklist.remove (template_id))
{
debug ("Removed blacklist template: [#%u]", template_id.hash ());
template_removed (template_id, event_template.to_variant ());
flush ();
}
else
{
debug ("Blacklist template [#%u] not found.", template_id.hash ());
}
}
public Variant get_templates ()
{
return BlacklistTemplates.to_variant (blacklist);
}
}
[ModuleInit]
#if BUILTIN_EXTENSIONS
public static Type blacklist_init (TypeModule module)
{
#else
public static Type extension_register (TypeModule module)
{
#endif
return typeof (Blacklist);
}
}
// vim:expandtab:ts=4:sw=4
|
