2009-06-15 08:27:29 +00:00
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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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2012-05-21 11:12:37 +00:00
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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2009-06-15 08:27:29 +00:00
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#ifndef nsDOMEventTargetHelper_h_
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#define nsDOMEventTargetHelper_h_
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#include "nsCOMPtr.h"
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2012-08-31 03:45:16 +00:00
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#include "nsGkAtoms.h"
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2009-06-15 08:27:29 +00:00
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#include "nsCycleCollectionParticipant.h"
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#include "nsPIDOMWindow.h"
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#include "nsIScriptGlobalObject.h"
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2011-06-24 02:18:01 +00:00
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#include "nsEventListenerManager.h"
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2010-06-23 19:46:08 +00:00
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#include "nsIScriptContext.h"
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2012-06-19 02:30:09 +00:00
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#include "mozilla/Attributes.h"
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2012-12-07 01:39:51 +00:00
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#include "mozilla/dom/EventTarget.h"
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2009-06-15 08:27:29 +00:00
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2012-09-27 20:11:31 +00:00
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class nsDOMEvent;
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2013-03-09 11:34:29 +00:00
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#define NS_DOMEVENTTARGETHELPER_IID \
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{ 0xda0e6d40, 0xc17b, 0x4937, \
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{ 0x8e, 0xa2, 0x99, 0xca, 0x1c, 0x81, 0xea, 0xbe } }
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2012-12-07 01:39:51 +00:00
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class nsDOMEventTargetHelper : public mozilla::dom::EventTarget
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{
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public:
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nsDOMEventTargetHelper() : mParentObject(nullptr), mOwnerWindow(nullptr), mHasOrHasHadOwnerWindow(false) {}
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2011-12-08 08:31:14 +00:00
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virtual ~nsDOMEventTargetHelper();
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2009-06-15 08:27:29 +00:00
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NS_DECL_CYCLE_COLLECTING_ISUPPORTS
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NS_DECL_CYCLE_COLLECTION_SKIPPABLE_SCRIPT_HOLDER_CLASS(nsDOMEventTargetHelper)
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NS_DECL_NSIDOMEVENTTARGET
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NS_DECLARE_STATIC_IID_ACCESSOR(NS_DOMEVENTTARGETHELPER_IID)
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2012-02-08 02:53:33 +00:00
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void GetParentObject(nsIScriptGlobalObject **aParentObject)
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{
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if (mParentObject) {
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CallQueryInterface(mParentObject, aParentObject);
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} else {
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*aParentObject = nullptr;
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}
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}
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static nsDOMEventTargetHelper* FromSupports(nsISupports* aSupports)
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{
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nsIDOMEventTarget* target =
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static_cast<nsIDOMEventTarget*>(aSupports);
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#ifdef DEBUG
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{
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nsCOMPtr<nsIDOMEventTarget> target_qi =
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do_QueryInterface(aSupports);
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// If this assertion fires the QI implementation for the object in
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// question doesn't use the nsIDOMEventTarget pointer as the
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// nsISupports pointer. That must be fixed, or we'll crash...
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NS_ASSERTION(target_qi == target, "Uh, fix QI!");
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}
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#endif
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return static_cast<nsDOMEventTargetHelper*>(target);
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}
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void Init(JSContext* aCx = nullptr);
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2012-10-29 04:33:51 +00:00
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bool HasListenersFor(nsIAtom* aTypeWithOn)
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{
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return mListenerManager && mListenerManager->HasListenersFor(aTypeWithOn);
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}
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nsresult SetEventHandler(nsIAtom* aType,
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JSContext* aCx,
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const JS::Value& aValue);
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void SetEventHandler(nsIAtom* aType,
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mozilla::dom::EventHandlerNonNull* aHandler,
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mozilla::ErrorResult& rv)
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{
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rv = GetListenerManager(true)->SetEventHandler(aType, aHandler);
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}
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void GetEventHandler(nsIAtom* aType,
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JSContext* aCx,
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JS::Value* aValue);
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mozilla::dom::EventHandlerNonNull* GetEventHandler(nsIAtom* aType)
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{
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nsEventListenerManager* elm = GetListenerManager(false);
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return elm ? elm->GetEventHandler(aType) : nullptr;
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}
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nsresult CheckInnerWindowCorrectness()
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{
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NS_ENSURE_STATE(!mHasOrHasHadOwnerWindow || mOwnerWindow);
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if (mOwnerWindow) {
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NS_ASSERTION(mOwnerWindow->IsInnerWindow(), "Should have inner window here!\n");
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nsPIDOMWindow* outer = mOwnerWindow->GetOuterWindow();
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if (!outer || outer->GetCurrentInnerWindow() != mOwnerWindow) {
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return NS_ERROR_FAILURE;
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}
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}
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return NS_OK;
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}
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2012-03-13 00:56:07 +00:00
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nsPIDOMWindow* GetOwner() const { return mOwnerWindow; }
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void BindToOwner(nsIGlobalObject* aOwner);
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void BindToOwner(nsPIDOMWindow* aOwner);
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void BindToOwner(nsDOMEventTargetHelper* aOther);
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virtual void DisconnectFromOwner();
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nsIGlobalObject* GetParentObject() const { return mParentObject; }
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bool HasOrHasHadOwner() { return mHasOrHasHadOwnerWindow; }
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protected:
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nsRefPtr<nsEventListenerManager> mListenerManager;
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// Dispatch a trusted, non-cancellable and non-bubbling event to |this|.
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nsresult DispatchTrustedEvent(const nsAString& aEventName);
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// Make |event| trusted and dispatch |aEvent| to |this|.
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nsresult DispatchTrustedEvent(nsIDOMEvent* aEvent);
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private:
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// Inner window or sandbox.
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nsIGlobalObject* mParentObject;
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// mParentObject pre QI-ed and cached
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// (it is needed for off main thread access)
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nsPIDOMWindow* mOwnerWindow;
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bool mHasOrHasHadOwnerWindow;
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};
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NS_DEFINE_STATIC_IID_ACCESSOR(nsDOMEventTargetHelper,
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NS_DOMEVENTTARGETHELPER_IID)
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// XPIDL event handlers
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#define NS_IMPL_EVENT_HANDLER(_class, _event) \
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NS_IMETHODIMP _class::GetOn##_event(JSContext* aCx, JS::Value* aValue) \
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{ \
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GetEventHandler(nsGkAtoms::on##_event, aCx, aValue); \
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return NS_OK; \
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} \
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NS_IMETHODIMP _class::SetOn##_event(JSContext* aCx, \
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const JS::Value& aValue) \
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{ \
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return SetEventHandler(nsGkAtoms::on##_event, aCx, aValue); \
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}
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#define NS_IMPL_FORWARD_EVENT_HANDLER(_class, _event, _baseclass) \
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NS_IMETHODIMP _class::GetOn##_event(JSContext* aCx, JS::Value* aValue) \
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{ \
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return _baseclass::GetOn##_event(aCx, aValue); \
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} \
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NS_IMETHODIMP _class::SetOn##_event(JSContext* aCx, \
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const JS::Value& aValue) \
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{ \
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return _baseclass::SetOn##_event(aCx, aValue); \
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}
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2012-11-09 16:00:25 +00:00
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// WebIDL event handlers
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#define IMPL_EVENT_HANDLER(_event) \
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inline mozilla::dom::EventHandlerNonNull* GetOn##_event() \
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{ \
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return GetEventHandler(nsGkAtoms::on##_event); \
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} \
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inline void SetOn##_event(mozilla::dom::EventHandlerNonNull* aCallback, \
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ErrorResult& aRv) \
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{ \
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SetEventHandler(nsGkAtoms::on##_event, aCallback, aRv); \
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}
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2012-06-03 16:33:52 +00:00
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/* Use this macro to declare functions that forward the behavior of this
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* interface to another object.
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* This macro doesn't forward PreHandleEvent because sometimes subclasses
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* want to override it.
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*/
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#define NS_FORWARD_NSIDOMEVENTTARGET_NOPREHANDLEEVENT(_to) \
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NS_IMETHOD AddEventListener(const nsAString & type, nsIDOMEventListener *listener, bool useCapture, bool wantsUntrusted, uint8_t _argc) { \
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return _to AddEventListener(type, listener, useCapture, wantsUntrusted, _argc); \
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} \
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NS_IMETHOD AddSystemEventListener(const nsAString & type, nsIDOMEventListener *listener, bool aUseCapture, bool aWantsUntrusted, uint8_t _argc) { \
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return _to AddSystemEventListener(type, listener, aUseCapture, aWantsUntrusted, _argc); \
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} \
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NS_IMETHOD RemoveEventListener(const nsAString & type, nsIDOMEventListener *listener, bool useCapture) { \
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return _to RemoveEventListener(type, listener, useCapture); \
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} \
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NS_IMETHOD RemoveSystemEventListener(const nsAString & type, nsIDOMEventListener *listener, bool aUseCapture) { \
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return _to RemoveSystemEventListener(type, listener, aUseCapture); \
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} \
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NS_IMETHOD DispatchEvent(nsIDOMEvent *evt, bool *_retval) { \
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return _to DispatchEvent(evt, _retval); \
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} \
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virtual mozilla::dom::EventTarget* GetTargetForDOMEvent() { \
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return _to GetTargetForDOMEvent(); \
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} \
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virtual mozilla::dom::EventTarget* GetTargetForEventTargetChain() { \
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return _to GetTargetForEventTargetChain(); \
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} \
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virtual nsresult WillHandleEvent(nsEventChainPostVisitor & aVisitor) { \
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return _to WillHandleEvent(aVisitor); \
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} \
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virtual nsresult PostHandleEvent(nsEventChainPostVisitor & aVisitor) { \
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return _to PostHandleEvent(aVisitor); \
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} \
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virtual nsresult DispatchDOMEvent(nsEvent *aEvent, nsIDOMEvent *aDOMEvent, nsPresContext *aPresContext, nsEventStatus *aEventStatus) { \
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return _to DispatchDOMEvent(aEvent, aDOMEvent, aPresContext, aEventStatus); \
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} \
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virtual nsEventListenerManager * GetListenerManager(bool aMayCreate) { \
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return _to GetListenerManager(aMayCreate); \
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} \
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virtual nsIScriptContext * GetContextForEventHandlers(nsresult *aRv) { \
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return _to GetContextForEventHandlers(aRv); \
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} \
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virtual JSContext * GetJSContextForEventHandlers(void) { \
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return _to GetJSContextForEventHandlers(); \
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}
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2009-06-15 08:27:29 +00:00
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#endif // nsDOMEventTargetHelper_h_
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