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//
// EventDispatcher.cpp
//
// Library: XML
// Package: DOM
// Module: DOMEvents
//
// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// SPDX-License-Identifier: BSL-1.0
//
#include "Poco/DOM/EventDispatcher.h"
#include "Poco/DOM/Event.h"
#include "Poco/DOM/EventListener.h"
namespace
{
class DispatchGuard
{
public:
DispatchGuard(int& count):
_count(count)
{
++_count;
}
~DispatchGuard()
{
--_count;
}
private:
int& _count;
};
}
namespace Poco {
namespace XML {
EventDispatcher::EventDispatcher():
_inDispatch(0)
{
}
EventDispatcher::~EventDispatcher()
{
}
void EventDispatcher::addEventListener(const XMLString& type, EventListener* listener, bool useCapture)
{
EventListenerItem item;
item.type = type;
item.pListener = listener;
item.useCapture = useCapture;
_listeners.push_front(item);
}
void EventDispatcher::removeEventListener(const XMLString& type, EventListener* listener, bool useCapture)
{
EventListenerList::iterator it = _listeners.begin();
while (it != _listeners.end())
{
if (it->type == type && it->pListener == listener && it->useCapture == useCapture)
{
it->pListener = 0;
}
if (!_inDispatch && !it->pListener)
{
EventListenerList::iterator del = it++;
_listeners.erase(del);
}
else ++it;
}
}
void EventDispatcher::dispatchEvent(Event* evt)
{
DispatchGuard guard(_inDispatch);
EventListenerList::iterator it = _listeners.begin();
while (it != _listeners.end())
{
if (it->pListener && it->type == evt->type())
{
it->pListener->handleEvent(evt);
}
if (!it->pListener)
{
EventListenerList::iterator del = it++;
_listeners.erase(del);
}
else ++it;
}
}
void EventDispatcher::captureEvent(Event* evt)
{
DispatchGuard guard(_inDispatch);
EventListenerList::iterator it = _listeners.begin();
while (it != _listeners.end())
{
if (it->pListener && it->useCapture && it->type == evt->type())
{
it->pListener->handleEvent(evt);
}
if (!it->pListener)
{
EventListenerList::iterator del = it++;
_listeners.erase(del);
}
else ++it;
}
}
void EventDispatcher::bubbleEvent(Event* evt)
{
DispatchGuard guard(_inDispatch);
EventListenerList::iterator it = _listeners.begin();
while (it != _listeners.end())
{
if (it->pListener && !it->useCapture && it->type == evt->type())
{
it->pListener->handleEvent(evt);
}
if (!it->pListener)
{
EventListenerList::iterator del = it++;
_listeners.erase(del);
}
else ++it;
}
}
} } // namespace Poco::XML
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