dom/events/CustomEvent.cpp

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #include "CustomEvent.h"
   8 #include "mozilla/dom/CustomEventBinding.h"
   9
  10 #include "mozilla/dom/BindingUtils.h"
  11 #include "mozilla/HoldDropJSObjects.h"
  12 #include "nsContentUtils.h"
  13
  14 using namespace mozilla;
  15 using namespace mozilla::dom;
  16
  17 CustomEvent::CustomEvent(mozilla::dom::EventTarget* aOwner,
  18                          nsPresContext* aPresContext,
  19                          mozilla::WidgetEvent* aEvent)
  20     : Event(aOwner, aPresContext, aEvent), mDetail(JS::NullValue()) {
  21   mozilla::HoldJSObjects(this);
  22 }
  23
  24 CustomEvent::~CustomEvent() { mozilla::DropJSObjects(this); }
  25
  26 NS_IMPL_CYCLE_COLLECTION_CLASS(CustomEvent)
  27 NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(CustomEvent, Event)
  28   mozilla::DropJSObjects(tmp);
  29 NS_IMPL_CYCLE_COLLECTION_UNLINK_END
  30
  31 NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(CustomEvent, Event)
  32 NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
  33
  34 NS_IMPL_CYCLE_COLLECTION_TRACE_BEGIN_INHERITED(CustomEvent, Event)
  35   NS_IMPL_CYCLE_COLLECTION_TRACE_JS_MEMBER_CALLBACK(mDetail)
  36 NS_IMPL_CYCLE_COLLECTION_TRACE_END
  37
  38 NS_IMPL_ADDREF_INHERITED(CustomEvent, Event)
  39 NS_IMPL_RELEASE_INHERITED(CustomEvent, Event)
  40
  41 NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(CustomEvent)
  42 NS_INTERFACE_MAP_END_INHERITING(Event)
  43
  44 already_AddRefed<CustomEvent> CustomEvent::Constructor(
  45     const GlobalObject& aGlobal, const nsAString& aType,
  46     const CustomEventInit& aParam) {
  47   nsCOMPtr<mozilla::dom::EventTarget> t =
  48       do_QueryInterface(aGlobal.GetAsSupports());
  49   RefPtr<CustomEvent> e = new CustomEvent(t, nullptr, nullptr);
  50   bool trusted = e->Init(t);
  51   JS::Rooted<JS::Value> detail(aGlobal.Context(), aParam.mDetail);
  52   e->InitCustomEvent(aGlobal.Context(), aType, aParam.mBubbles,
  53                      aParam.mCancelable, detail);
  54   e->SetTrusted(trusted);
  55   e->SetComposed(aParam.mComposed);
  56   return e.forget();
  57 }
  58
  59 JSObject* CustomEvent::WrapObjectInternal(JSContext* aCx,
  60                                           JS::Handle<JSObject*> aGivenProto) {
  61   return mozilla::dom::CustomEvent_Binding::Wrap(aCx, this, aGivenProto);
  62 }
  63
  64 void CustomEvent::InitCustomEvent(JSContext* aCx, const nsAString& aType,
  65                                   bool aCanBubble, bool aCancelable,
  66                                   JS::Handle<JS::Value> aDetail) {
  67   NS_ENSURE_TRUE_VOID(!mEvent->mFlags.mIsBeingDispatched);
  68
  69   Event::InitEvent(aType, aCanBubble, aCancelable);
  70   mDetail = aDetail;
  71 }
  72
  73 void CustomEvent::GetDetail(JSContext* aCx,
  74                             JS::MutableHandle<JS::Value> aRetval) {
  75   aRetval.set(mDetail);
  76 }
  77
  78 already_AddRefed<CustomEvent> NS_NewDOMCustomEvent(
  79     EventTarget* aOwner, nsPresContext* aPresContext,
  80     mozilla::WidgetEvent* aEvent) {
  81   RefPtr<CustomEvent> it = new CustomEvent(aOwner, aPresContext, aEvent);
  82   return it.forget();
  83 }