WorkerEventQueue.cpp [plain text]
#include "config.h"
#include "WorkerEventQueue.h"
#include "Event.h"
#include "EventNames.h"
#include "EventTarget.h"
#include "ScriptExecutionContext.h"
namespace WebCore {
WorkerEventQueue::WorkerEventQueue(ScriptExecutionContext& context)
: m_scriptExecutionContext(context)
{
}
WorkerEventQueue::~WorkerEventQueue()
{
close();
}
class WorkerEventQueue::EventDispatcher
{
public:
EventDispatcher(RefPtr<Event>&& event, WorkerEventQueue& eventQueue)
: m_event(WTFMove(event))
, m_eventQueue(eventQueue)
{
}
~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 { false };
};
bool WorkerEventQueue::enqueueEvent(Ref<Event>&& event)
{
if (m_isClosed)
return false;
auto* eventPtr = event.ptr();
auto eventDispatcher = std::make_unique<EventDispatcher>(WTFMove(event), *this);
m_eventDispatcherMap.add(eventPtr, eventDispatcher.get());
m_scriptExecutionContext.postTask([eventDispatcher = WTFMove(eventDispatcher)] (ScriptExecutionContext&) {
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();
}
}