gecko-dev/content/events/public/nsPLDOMEvent.h

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#ifndef nsPLDOMEvent_h___
#define nsPLDOMEvent_h___

#include "nsCOMPtr.h"
#include "nsThreadUtils.h"
#include "nsIDOMNode.h"
#include "nsString.h"

/**
 * Use nsPLDOMEvent to fire a DOM event that requires safe a stable DOM.
 * For example, you may need to fire an event from within layout, but
 * want to ensure that the event handler doesn't mutate the DOM at
 * the wrong time, in order to avoid resulting instability.
 *
 * TODO: This should be renamed nsAsyncDOMEvent or something that does
 *       not include the substring "PL" that refers to the old PLEvent
 *       structure used with the old eventing system.  See bug 334573.
 */
 
class nsPLDOMEvent : public nsRunnable {
public:
  nsPLDOMEvent (nsIDOMNode *aEventNode, const nsAString& aEventType)
    : mEventNode(aEventNode), mEventType(aEventType)
  { }

  nsPLDOMEvent(nsIDOMNode *aEventNode, nsIDOMEvent *aEvent)
    : mEventNode(aEventNode), mEvent(aEvent)
  { }

  NS_IMETHOD Run();
  nsresult PostDOMEvent();
  nsresult RunDOMEventWhenSafe();

  nsCOMPtr<nsIDOMNode>  mEventNode;
  nsCOMPtr<nsIDOMEvent> mEvent;
  nsString              mEventType;
};

#endif