diff -r 000000000000 -r 6474c204b198 dom/events/ClipboardEvent.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/events/ClipboardEvent.cpp	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,135 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "mozilla/dom/ClipboardEvent.h"
+#include "mozilla/ContentEvents.h"
+#include "mozilla/dom/DataTransfer.h"
+#include "nsIClipboard.h"
+
+namespace mozilla {
+namespace dom {
+
+ClipboardEvent::ClipboardEvent(EventTarget* aOwner,
+                               nsPresContext* aPresContext,
+                               InternalClipboardEvent* aEvent)
+  : Event(aOwner, aPresContext,
+          aEvent ? aEvent : new InternalClipboardEvent(false, 0))
+{
+  if (aEvent) {
+    mEventIsInternal = false;
+  } else {
+    mEventIsInternal = true;
+    mEvent->time = PR_Now();
+  }
+}
+
+NS_INTERFACE_MAP_BEGIN(ClipboardEvent)
+  NS_INTERFACE_MAP_ENTRY(nsIDOMClipboardEvent)
+NS_INTERFACE_MAP_END_INHERITING(Event)
+
+NS_IMPL_ADDREF_INHERITED(ClipboardEvent, Event)
+NS_IMPL_RELEASE_INHERITED(ClipboardEvent, Event)
+
+nsresult
+ClipboardEvent::InitClipboardEvent(const nsAString& aType,
+                                   bool aCanBubble,
+                                   bool aCancelable,
+                                   nsIDOMDataTransfer* aClipboardData)
+{
+  nsCOMPtr<DataTransfer> clipboardData = do_QueryInterface(aClipboardData);
+  // Null clipboardData is OK
+
+  ErrorResult rv;
+  InitClipboardEvent(aType, aCanBubble, aCancelable, clipboardData, rv);
+
+  return rv.ErrorCode();
+}
+
+void
+ClipboardEvent::InitClipboardEvent(const nsAString& aType, bool aCanBubble,
+                                   bool aCancelable,
+                                   DataTransfer* aClipboardData,
+                                   ErrorResult& aError)
+{
+  aError = Event::InitEvent(aType, aCanBubble, aCancelable);
+  if (aError.Failed()) {
+    return;
+  }
+
+  mEvent->AsClipboardEvent()->clipboardData = aClipboardData;
+}
+
+already_AddRefed<ClipboardEvent>
+ClipboardEvent::Constructor(const GlobalObject& aGlobal,
+                            const nsAString& aType,
+                            const ClipboardEventInit& aParam,
+                            ErrorResult& aRv)
+{
+  nsCOMPtr<EventTarget> t = do_QueryInterface(aGlobal.GetAsSupports());
+  nsRefPtr<ClipboardEvent> e = new ClipboardEvent(t, nullptr, nullptr);
+  bool trusted = e->Init(t);
+
+  nsRefPtr<DataTransfer> clipboardData;
+  if (e->mEventIsInternal) {
+    InternalClipboardEvent* event = e->mEvent->AsClipboardEvent();
+    if (event) {
+      // Always create a clipboardData for the copy event. If this is changed to
+      // support other types of events, make sure that read/write privileges are
+      // checked properly within DataTransfer.
+      clipboardData = new DataTransfer(ToSupports(e), NS_COPY, false, -1);
+      clipboardData->SetData(aParam.mDataType, aParam.mData);
+    }
+  }
+
+  e->InitClipboardEvent(aType, aParam.mBubbles, aParam.mCancelable,
+                        clipboardData, aRv);
+  e->SetTrusted(trusted);
+  return e.forget();
+}
+
+NS_IMETHODIMP
+ClipboardEvent::GetClipboardData(nsIDOMDataTransfer** aClipboardData)
+{
+  NS_IF_ADDREF(*aClipboardData = GetClipboardData());
+  return NS_OK;
+}
+
+DataTransfer*
+ClipboardEvent::GetClipboardData()
+{
+  InternalClipboardEvent* event = mEvent->AsClipboardEvent();
+
+  if (!event->clipboardData) {
+    if (mEventIsInternal) {
+      event->clipboardData =
+        new DataTransfer(ToSupports(this), NS_COPY, false, -1);
+    } else {
+      event->clipboardData =
+        new DataTransfer(ToSupports(this), event->message,
+                         event->message == NS_PASTE,
+                         nsIClipboard::kGlobalClipboard);
+    }
+  }
+
+  return event->clipboardData;
+}
+
+} // namespace dom
+} // namespace mozilla
+
+using namespace mozilla;
+using namespace mozilla::dom;
+
+nsresult
+NS_NewDOMClipboardEvent(nsIDOMEvent** aInstancePtrResult,
+                        EventTarget* aOwner,
+                        nsPresContext* aPresContext,
+                        InternalClipboardEvent* aEvent)
+{
+  ClipboardEvent* it = new ClipboardEvent(aOwner, aPresContext, aEvent);
+  NS_ADDREF(it);
+  *aInstancePtrResult = static_cast<Event*>(it);
+  return NS_OK;
+}