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/*
* Copyright (C) 2010 Google Inc. All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#include "config.h"
#include "WorkerEventQueue.h"
#include "DOMWindow.h"
#include "Document.h"
#include "Event.h"
#include "EventNames.h"
#include "ScriptExecutionContext.h"
namespace WebCore {
WorkerEventQueue::WorkerEventQueue(ScriptExecutionContext& context)
: m_scriptExecutionContext(context)
, m_isClosed(false)
{
}
WorkerEventQueue::~WorkerEventQueue()
{
close();
}
class WorkerEventQueue::EventDispatcher
{
public:
EventDispatcher(RefPtr<Event>&& event, WorkerEventQueue& eventQueue)
: m_event(WTFMove(event))
, m_eventQueue(eventQueue)
, m_isCancelled(false)
{
}
~EventDispatcher()
{
if (m_event)
m_eventQueue.m_eventDispatcherMap.remove(m_event.get());
}
void dispatch()
{
if (m_isCancelled)
return;
m_eventQueue.m_eventDispatcherMap.remove(m_event.get());
m_event->target()->dispatchEvent(*m_event);
m_event = nullptr;
}
void cancel()
{
m_isCancelled = true;
m_event = nullptr;
}
private:
RefPtr<Event> m_event;
WorkerEventQueue& m_eventQueue;
bool m_isCancelled;
};
bool WorkerEventQueue::enqueueEvent(Ref<Event>&& event)
{
if (m_isClosed)
return false;
EventDispatcher* eventDispatcherPtr = new EventDispatcher(event.copyRef(), *this);
m_eventDispatcherMap.add(event.ptr(), eventDispatcherPtr);
m_scriptExecutionContext.postTask([eventDispatcherPtr] (ScriptExecutionContext&) {
std::unique_ptr<EventDispatcher> eventDispatcher(eventDispatcherPtr);
eventDispatcher->dispatch();
});
return true;
}
bool WorkerEventQueue::cancelEvent(Event& event)
{
EventDispatcher* task = m_eventDispatcherMap.take(&event);
if (!task)
return false;
task->cancel();
return true;
}
void WorkerEventQueue::close()
{
m_isClosed = true;
for (auto& dispatcher : m_eventDispatcherMap.values())
dispatcher->cancel();
m_eventDispatcherMap.clear();
}
}
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