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https://gitlab.winehq.org/wine/wine-gecko.git
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146 lines
4.7 KiB
C++
146 lines
4.7 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#ifndef nsIJSEventListener_h__
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#define nsIJSEventListener_h__
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#include "nsIScriptContext.h"
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#include "jsapi.h"
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#include "nsIDOMEventListener.h"
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class nsIScriptObjectOwner;
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class nsIAtom;
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#define NS_IJSEVENTLISTENER_IID \
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{ 0x92f9212b, 0xa6aa, 0x4867, \
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{ 0x93, 0x8a, 0x56, 0xbe, 0x17, 0x67, 0x4f, 0xd4 } }
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// Implemented by script event listeners. Used to retrieve the
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// script object corresponding to the event target and the handler itself.
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// (Note this interface is now used to store script objects for all
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// script languages, so is no longer JS specific)
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//
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// Note, mTarget is a raw pointer and the owner of the nsIJSEventListener object
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// is expected to call Disconnect()!
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class nsIJSEventListener : public nsIDOMEventListener
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{
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public:
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NS_DECLARE_STATIC_IID_ACCESSOR(NS_IJSEVENTLISTENER_IID)
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nsIJSEventListener(nsIScriptContext* aContext, JSObject* aScopeObject,
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nsISupports *aTarget, JSObject *aHandler)
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: mContext(aContext), mScopeObject(aScopeObject), mHandler(aHandler)
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{
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nsCOMPtr<nsISupports> base = do_QueryInterface(aTarget);
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mTarget = base.get();
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}
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nsIScriptContext *GetEventContext() const
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{
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return mContext;
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}
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nsISupports *GetEventTarget() const
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{
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return mTarget;
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}
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void Disconnect()
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{
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mTarget = nsnull;
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}
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JSObject* GetEventScope() const
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{
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return mScopeObject;
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}
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JSObject *GetHandler() const
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{
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return mHandler;
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}
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// Set a handler for this event listener. Must not be called if
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// there is already a handler! The handler must already be bound to
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// the right target.
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virtual void SetHandler(JSObject *aHandler) = 0;
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// Among the sub-classes that inherit (directly or indirectly) from nsINode,
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// measurement of the following members may be added later if DMD finds it is
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// worthwhile:
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// - nsIJSEventListener: mEventName
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//
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virtual size_t SizeOfExcludingThis(nsMallocSizeOfFun aMallocSizeOf) const
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{
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return 0;
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// Measurement of the following members may be added later if DMD finds it
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// is worthwhile:
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// - mContext
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// - mTarget
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//
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// The following members are not measured:
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// - mScopeObject, mHandler: because they're measured by the JS memory
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// reporters
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}
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virtual size_t SizeOfIncludingThis(nsMallocSizeOfFun aMallocSizeOf) const
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{
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return aMallocSizeOf(this) + SizeOfExcludingThis(aMallocSizeOf);
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}
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protected:
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virtual ~nsIJSEventListener()
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{
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NS_ASSERTION(!mTarget, "Should have called Disconnect()!");
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}
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nsCOMPtr<nsIScriptContext> mContext;
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JSObject* mScopeObject;
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nsISupports* mTarget;
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JSObject *mHandler;
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};
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NS_DEFINE_STATIC_IID_ACCESSOR(nsIJSEventListener, NS_IJSEVENTLISTENER_IID)
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/* factory function. aHandler must already be bound to aTarget */
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nsresult NS_NewJSEventListener(nsIScriptContext *aContext,
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JSObject* aScopeObject, nsISupports* aTarget,
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nsIAtom* aType, JSObject* aHandler,
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nsIJSEventListener **aReturn);
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#endif // nsIJSEventListener_h__
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