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/*
#--
# Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies)
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 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 Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#--
*/
var NotificationCenterManager = function(name) {
this.name = name;
this.observers = {};
// Adds an observer to be triggered by the +identifier+ +callback+
// is a callback to be run whenever the observers is
// notified. Optionally a +sender+ argument can be supplied, which
// is useful for removing the observer created here at a later time
//
// (It's your responsibility to bind the callback Function to
// whatever scope you need it to be in)
this.addObserver = function(identifier, callback, sender) {
if (!(this.observers[identifier] instanceof Array))
this.observers[identifier] = [];
this.observers[identifier].push({
'callback': callback,
'sender': sender
});
};
// notify observers for the +identifier+ event
// Any other arguments are given as arguments to the callback for
// the observer(s) being called
this.notifyObservers = function(identifier) {
var observers = this.observers[identifier];
if (!observers)
return false;
for (i=0; i < observers.length; i++) {
var args = jQuery.makeArray(arguments);
observers[i].callback.apply(observers[i].callback, args.slice(1, args.length));
};
return true;
};
// remove all observers associated with +identifier+
this.removeAllObservers = function(identifier) {
delete this.observers[identifier];
};
// remove the observer that +originalSender+ has initiated for
// +identifier+
this.removeObserver = function(identifier, originalSender) {
var observers = this.observers[identifier];
if (!observers)
return false;
wasDeleted = false;
for (var i=0; i < observers.length; i++) {
if (observers[i].sender === originalSender) {
// Clear out the cached closure (if neeeded)
if (window.__objs && observers[i].__objId)
window.__objs[observers[i].__objId] = null;
observers.splice(i, 1);
wasDeleted = true;
}
}
return wasDeleted;
};
};
var NotificationCenter = new NotificationCenterManager("default notification center");
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