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//
// EventDispatcher.h
//
// Library: XML
// Package: DOM
// Module: DOMEvents
//
// Definition of the EventDispatcher class.
//
// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// SPDX-License-Identifier: BSL-1.0
//
#ifndef DOM_EventDispatcher_INCLUDED
#define DOM_EventDispatcher_INCLUDED
#include "Poco/XML/XML.h"
#include "Poco/XML/XMLString.h"
#include <list>
namespace Poco {
namespace XML {
class Event;
class EventListener;
class XML_API EventDispatcher
/// This helper class manages event listener subscriptions
/// and event dispatching for AbstractNode.
///
/// The EventListener list is managed in such a way that
/// event listeners can be added and removed even
/// from within an EventListener, while events are being
/// dispatched.
{
public:
EventDispatcher();
/// Creates the EventDispatcher.
~EventDispatcher();
/// Destroys the EventDispatcher.
void addEventListener(const XMLString& type, EventListener* listener, bool useCapture);
/// Adds an EventListener to the internal list.
void removeEventListener(const XMLString& type, EventListener* listener, bool useCapture);
/// Removes an EventListener from the internal list.
///
/// If a dispatch is currently in progress, the list
/// entry is only marked for deletion.
/// If no dispatch is currently in progress, all EventListeners
/// marked for deletion are removed from the list.
void dispatchEvent(Event* evt);
/// Dispatches the event.
///
/// Also removes all EventListeners marked for deletion from the
/// event dispatcher list.
void captureEvent(Event* evt);
/// Dispatches the event in its capturing phase.
///
/// Also removes all EventListeners marked for deletion from the
/// event dispatcher list.
void bubbleEvent(Event* evt);
/// Dispatches the event in its bubbling phase.
///
/// Also removes all EventListeners marked for deletion from the
/// event dispatcher list.
private:
struct EventListenerItem
{
XMLString type;
EventListener* pListener;
bool useCapture;
};
typedef std::list<EventListenerItem> EventListenerList;
int _inDispatch;
EventListenerList _listeners;
};
} } // namespace Poco::XML
#endif // DOM_EventDispatcher_INCLUDED
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