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/*
* Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; version 2 of the
* License.
*
* 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 General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA
*/
//#include "stdafx.h"
#include "base/notifications.h"
#include "base/log.h"
#include <stdexcept>
DEFAULT_LOG_DOMAIN("base");
using namespace base;
NotificationCenter *NotificationCenter::get()
{
static NotificationCenter *nc = 0;
if (!nc)
nc = new NotificationCenter();
return nc;
}
Observer::~Observer()
{
NotificationCenter *nc = NotificationCenter::get();
if (nc->remove_observer(this))
log_error("INTERNAL ERROR: Observer %p was deleted while still listening for notifications\n", this);
}
void NotificationCenter::add_observer(Observer *observer, const std::string &name)
{
ObserverEntry entry;
entry.observer = observer;
entry.observed_notification = name;
_observers.push_back(entry);
}
/*
void NotificationCenter::add_observer(Observer *observer, boost::function<void (const std::string &, void*, NotificationInfo &)> &callback, const std::string &name)
{
ObserverEntry entry;
entry.observer = observer;
entry.callback = callback;
entry.observed_notification = name;
_observers.push_back(entry);
}*/
bool NotificationCenter::remove_observer(Observer *observer, const std::string &name)
{
bool found = false;
for (std::list<ObserverEntry>::iterator next, iter = _observers.begin(); iter != _observers.end();)
{
next = iter;
++next;
if (iter->observer == observer && (name.empty() || name == iter->observed_notification))
{
found = true;
_observers.erase(iter);
}
iter = next;
}
return found;
}
void NotificationCenter::send(const std::string &name, void *sender, NotificationInfo &info)
{
if (name.substr(0, 2) != "GN")
throw std::invalid_argument("Attempt to send notification with a name that doesn't start with GNot");
// act on a copy of the observer list, because one of them could remove stuff from the list
std::list<ObserverEntry> copy(_observers);
for (std::list<ObserverEntry>::iterator iter = copy.begin(); iter != copy.end(); ++iter)
{
if (iter->observed_notification.empty() || iter->observed_notification == name)
{
//if (iter->callback)
// iter->callback(name, sender, info);
//else
iter->observer->handle_notification(name, sender, info);
}
}
}
void NotificationCenter::send(const std::string &name, void *sender)
{
NotificationInfo info;
send(name, sender, info);
}
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