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/*
* Copyright (C) 2012 Victor Carbune (victor@rosedu.org)
*
* 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 "GenericEventQueue.h"
#include "Event.h"
#include "EventTarget.h"
#include "ScriptExecutionContext.h"
#include "Timer.h"
#include <wtf/MainThread.h>
namespace WebCore {
GenericEventQueue::GenericEventQueue(EventTarget& owner)
: m_owner(owner)
, m_isClosed(false)
{
}
GenericEventQueue::~GenericEventQueue()
{
}
void GenericEventQueue::enqueueEvent(RefPtr<Event>&& event)
{
if (m_isClosed)
return;
if (event->target() == &m_owner)
event->setTarget(nullptr);
m_pendingEvents.append(WTFMove(event));
if (m_isSuspended)
return;
m_taskQueue.enqueueTask(std::bind(&GenericEventQueue::dispatchOneEvent, this));
}
void GenericEventQueue::dispatchOneEvent()
{
ASSERT(!m_pendingEvents.isEmpty());
Ref<EventTarget> protect(m_owner);
RefPtr<Event> event = m_pendingEvents.takeFirst();
EventTarget& target = event->target() ? *event->target() : m_owner;
target.dispatchEvent(*event);
}
void GenericEventQueue::close()
{
m_isClosed = true;
m_taskQueue.close();
m_pendingEvents.clear();
}
void GenericEventQueue::cancelAllEvents()
{
m_taskQueue.cancelAllTasks();
m_pendingEvents.clear();
}
bool GenericEventQueue::hasPendingEvents() const
{
return !m_pendingEvents.isEmpty();
}
bool GenericEventQueue::hasPendingEventsOfType(const AtomicString& type) const
{
for (auto& event : m_pendingEvents) {
if (event->type() == type)
return true;
}
return false;
}
void GenericEventQueue::suspend()
{
ASSERT(!m_isSuspended);
m_isSuspended = true;
m_taskQueue.cancelAllTasks();
}
void GenericEventQueue::resume()
{
if (!m_isSuspended)
return;
m_isSuspended = false;
if (m_pendingEvents.isEmpty())
return;
for (unsigned i = 0; i < m_pendingEvents.size(); ++i)
m_taskQueue.enqueueTask(std::bind(&GenericEventQueue::dispatchOneEvent, this));
}
}
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