gecko/content/events/public/nsAsyncDOMEvent.h

108 lines
3.7 KiB
C++

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* Aaron Leventhal (aaronleventhal@moonset.net)
* Portions created by the Initial Developer are Copyright (C) 2005
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#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