gecko/content/events/public/nsAsyncDOMEvent.h

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
2012-05-21 04:12:37 -07:00
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef nsAsyncDOMEvent_h___
#define nsAsyncDOMEvent_h___
#include "nsCOMPtr.h"
#include "nsThreadUtils.h"
#include "nsINode.h"
#include "nsIDOMEvent.h"
#include "nsString.h"
#include "nsIDocument.h"
/**
* Use nsAsyncDOMEvent 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.
*/
class nsAsyncDOMEvent : public nsRunnable {
public:
nsAsyncDOMEvent(nsINode *aEventNode, const nsAString& aEventType,
bool aBubbles, bool aDispatchChromeOnly)
: mEventNode(aEventNode), mEventType(aEventType),
mBubbles(aBubbles),
mDispatchChromeOnly(aDispatchChromeOnly)
{ }
nsAsyncDOMEvent(nsINode *aEventNode, nsIDOMEvent *aEvent)
: mEventNode(aEventNode), mEvent(aEvent), mDispatchChromeOnly(false)
{ }
nsAsyncDOMEvent(nsINode *aEventNode, nsEvent &aEvent);
NS_IMETHOD Run();
nsresult PostDOMEvent();
void RunDOMEventWhenSafe();
nsCOMPtr<nsINode> mEventNode;
nsCOMPtr<nsIDOMEvent> mEvent;
nsString mEventType;
bool mBubbles;
bool mDispatchChromeOnly;
};
class nsLoadBlockingAsyncDOMEvent : public nsAsyncDOMEvent {
public:
nsLoadBlockingAsyncDOMEvent(nsINode *aEventNode, const nsAString& aEventType,
bool aBubbles, bool aDispatchChromeOnly)
: nsAsyncDOMEvent(aEventNode, aEventType, aBubbles, aDispatchChromeOnly),
mBlockedDoc(aEventNode->OwnerDoc())
{
if (mBlockedDoc) {
mBlockedDoc->BlockOnload();
}
}
nsLoadBlockingAsyncDOMEvent(nsINode *aEventNode, nsIDOMEvent *aEvent)
: nsAsyncDOMEvent(aEventNode, aEvent),
mBlockedDoc(aEventNode->OwnerDoc())
{
if (mBlockedDoc) {
mBlockedDoc->BlockOnload();
}
}
~nsLoadBlockingAsyncDOMEvent();
nsCOMPtr<nsIDocument> mBlockedDoc;
};
#endif