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/*
* Copyright (c) 2011, 2014, 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 "base/notifications.h"
#include "base/log.h"
#include <stdexcept>
DEFAULT_LOG_DOMAIN(DOMAIN_BASE);
using namespace base;
static NotificationCenter *nc = 0;
void NotificationCenter::set_instance(NotificationCenter *center)
{
std::map<std::string, NotificationHelp> help;
if (nc)
{
help = nc->_notification_help;
delete nc;
}
nc = center;
nc->_notification_help = help;
}
NotificationCenter *NotificationCenter::get()
{
if (!nc)
nc = new NotificationCenter();
return nc;
}
//--------------------------------------------------------------------------------------------------
Observer::~Observer()
{
NotificationCenter *nc = NotificationCenter::get();
if (nc->is_registered(this))
log_error("Notifications: Observer %p was deleted while still listening for notifications.\n", this);
}
//--------------------------------------------------------------------------------------------------
NotificationCenter::~NotificationCenter()
{
if (_observers.size() > 0)
{
log_error("Notifications: The following observers are not unregistered:\n");
for (std::list<ObserverEntry>::iterator next, iter = _observers.begin(); iter != _observers.end(); ++iter)
log_error("\tObserver %p, for message: %s\n", iter->observer, iter->observed_notification.c_str());
}
}
//--------------------------------------------------------------------------------------------------
void NotificationCenter::register_notification(const std::string &name,
const std::string &context,
const std::string &general_info,
const std::string &sender_info,
const std::string &info_info)
{
NotificationHelp help;
help.context = context;
help.summary = general_info;
help.sender = sender_info;
help.info = info_info;
_notification_help[name] = help;
}
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;
}
if (!found)
log_debug("remove_observer: %p for %s failed to remove any observers\n", observer, name.c_str());
return found;
}
//--------------------------------------------------------------------------------------------------
bool NotificationCenter::is_registered(Observer *observer)
{
for (std::list<ObserverEntry>::iterator next, iter = _observers.begin(); iter != _observers.end(); ++iter)
{
if (iter->observer == observer)
return true;
}
return false;
}
//--------------------------------------------------------------------------------------------------
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 GN\n");
if (_notification_help.find(name) == _notification_help.end())
log_info("Notification %s is not registered\n", name.c_str());
// 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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