dom/base/nsIJSEventListener.h
author Jonas Sicking <jonas@sicking.cc>
Thu, 06 Jan 2011 20:45:10 -0800
changeset 60098 3f18931661f974df4a8998e249e5005352b48360
parent 34157 c7c444840f1168ea78f18befcc3f6ebcbc67d2d0
child 76878 1f58f9ed470c7f46d05228c219370e2fff81ca4d
permissions -rw-r--r--
Bug 610823: Change a few users that use nsTArrays as buffers to explicitly use fallible tarray. r=jdaggett a=blocker

/* -*- 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
 * Netscape Communications Corporation.
 * Portions created by the Initial Developer are Copyright (C) 1998
 * 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 nsIJSEventListener_h__
#define nsIJSEventListener_h__

#include "nsIScriptContext.h"
#include "jsapi.h"

class nsIScriptObjectOwner;
class nsIDOMEventListener;
class nsIAtom;

#define NS_IJSEVENTLISTENER_IID     \
{ 0x08ca15c4, 0x1c2d, 0x449e, \
  { 0x9e, 0x88, 0xaa, 0x8b, 0xbf, 0x00, 0xf7, 0x63 } }

// Implemented by script event listeners. Used to retrieve the
// script object corresponding to the event target.
// (Note this interface is now used to store script objects for all
// script languages, so is no longer JS specific)
class nsIJSEventListener : public nsISupports
{
public:
  NS_DECLARE_STATIC_IID_ACCESSOR(NS_IJSEVENTLISTENER_IID)

  nsIJSEventListener(nsIScriptContext *aContext, void *aScopeObject,
                     nsISupports *aTarget)
    : mContext(aContext), mScopeObject(aScopeObject),
      mTarget(do_QueryInterface(aTarget))
  {
  }

  nsIScriptContext *GetEventContext()
  {
    return mContext;
  }

  nsISupports *GetEventTarget()
  {
    return mTarget;
  }

  void *GetEventScope()
  {
    return mScopeObject;
  }

  virtual nsresult GetJSVal(const nsAString& aEventName, jsval* aJSVal) = 0;

protected:
  virtual ~nsIJSEventListener()
  {
  }
  nsCOMPtr<nsIScriptContext> mContext;
  void *mScopeObject;
  nsCOMPtr<nsISupports> mTarget;
};

NS_DEFINE_STATIC_IID_ACCESSOR(nsIJSEventListener, NS_IJSEVENTLISTENER_IID)

/* factory function */
nsresult NS_NewJSEventListener(nsIScriptContext *aContext,
                               void *aScopeObject, nsISupports *aObject,
                               nsIAtom* aType, nsIDOMEventListener **aReturn);

#endif // nsIJSEventListener_h__