WorkerEventQueue.cpp [plain text]
#include "config.h"
#include "WorkerEventQueue.h"
#include "DOMWindow.h"
#include "Document.h"
#include "Event.h"
#include "EventNames.h"
#include "ScriptExecutionContext.h"
namespace WebCore {
PassOwnPtr<WorkerEventQueue> WorkerEventQueue::create(ScriptExecutionContext* context)
{
return adoptPtr(new WorkerEventQueue(context));
}
WorkerEventQueue::WorkerEventQueue(ScriptExecutionContext* context)
: m_scriptExecutionContext(context)
, m_isClosed(false)
{
}
WorkerEventQueue::~WorkerEventQueue()
{
close();
}
class WorkerEventQueue::EventDispatcherTask : public ScriptExecutionContext::Task {
public:
static PassOwnPtr<EventDispatcherTask> create(PassRefPtr<Event> event, WorkerEventQueue* eventQueue)
{
return adoptPtr(new EventDispatcherTask(event, eventQueue));
}
virtual ~EventDispatcherTask()
{
if (m_event)
m_eventQueue->removeEvent(m_event.get());
}
void dispatchEvent(ScriptExecutionContext*, PassRefPtr<Event> event)
{
event->target()->dispatchEvent(event);
}
virtual void performTask(ScriptExecutionContext* context)
{
if (m_isCancelled)
return;
m_eventQueue->removeEvent(m_event.get());
dispatchEvent(context, m_event);
m_event.clear();
}
void cancel()
{
m_isCancelled = true;
m_event.clear();
}
private:
EventDispatcherTask(PassRefPtr<Event> event, WorkerEventQueue* eventQueue)
: m_event(event)
, m_eventQueue(eventQueue)
, m_isCancelled(false)
{
}
RefPtr<Event> m_event;
WorkerEventQueue* m_eventQueue;
bool m_isCancelled;
};
void WorkerEventQueue::removeEvent(Event* event)
{
m_eventTaskMap.remove(event);
}
bool WorkerEventQueue::enqueueEvent(PassRefPtr<Event> prpEvent)
{
if (m_isClosed)
return false;
RefPtr<Event> event = prpEvent;
OwnPtr<EventDispatcherTask> task = EventDispatcherTask::create(event, this);
m_eventTaskMap.add(event.release(), task.get());
m_scriptExecutionContext->postTask(task.release());
return true;
}
bool WorkerEventQueue::cancelEvent(Event* event)
{
EventDispatcherTask* task = m_eventTaskMap.get(event);
if (!task)
return false;
task->cancel();
removeEvent(event);
return true;
}
void WorkerEventQueue::close()
{
m_isClosed = true;
for (EventTaskMap::iterator it = m_eventTaskMap.begin(); it != m_eventTaskMap.end(); ++it) {
EventDispatcherTask* task = it->value;
task->cancel();
}
m_eventTaskMap.clear();
}
}