diff -r 000000000000 -r 6474c204b198 dom/base/DOMRequest.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/base/DOMRequest.cpp	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,329 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=2 et sw=2 tw=80: */
+/* 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 "DOMRequest.h"
+
+#include "DOMError.h"
+#include "nsCxPusher.h"
+#include "nsThreadUtils.h"
+#include "DOMCursor.h"
+#include "nsIDOMEvent.h"
+
+using mozilla::dom::DOMRequest;
+using mozilla::dom::DOMRequestService;
+using mozilla::dom::DOMCursor;
+using mozilla::AutoSafeJSContext;
+
+DOMRequest::DOMRequest(nsPIDOMWindow* aWindow)
+  : DOMEventTargetHelper(aWindow->IsInnerWindow() ?
+                           aWindow : aWindow->GetCurrentInnerWindow())
+  , mResult(JSVAL_VOID)
+  , mDone(false)
+{
+}
+
+NS_IMPL_CYCLE_COLLECTION_CLASS(DOMRequest)
+
+NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(DOMRequest,
+                                                  DOMEventTargetHelper)
+  NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mError)
+NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
+
+NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(DOMRequest,
+                                                DOMEventTargetHelper)
+  NS_IMPL_CYCLE_COLLECTION_UNLINK(mError)
+  tmp->mResult = JSVAL_VOID;
+NS_IMPL_CYCLE_COLLECTION_UNLINK_END
+
+NS_IMPL_CYCLE_COLLECTION_TRACE_BEGIN_INHERITED(DOMRequest,
+                                               DOMEventTargetHelper)
+  // Don't need NS_IMPL_CYCLE_COLLECTION_TRACE_PRESERVED_WRAPPER because
+  // DOMEventTargetHelper does it for us.
+  NS_IMPL_CYCLE_COLLECTION_TRACE_JSVAL_MEMBER_CALLBACK(mResult)
+NS_IMPL_CYCLE_COLLECTION_TRACE_END
+
+NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION_INHERITED(DOMRequest)
+  NS_INTERFACE_MAP_ENTRY(nsIDOMDOMRequest)
+NS_INTERFACE_MAP_END_INHERITING(DOMEventTargetHelper)
+
+NS_IMPL_ADDREF_INHERITED(DOMRequest, DOMEventTargetHelper)
+NS_IMPL_RELEASE_INHERITED(DOMRequest, DOMEventTargetHelper)
+
+/* virtual */ JSObject*
+DOMRequest::WrapObject(JSContext* aCx)
+{
+  return DOMRequestBinding::Wrap(aCx, this);
+}
+
+NS_IMPL_EVENT_HANDLER(DOMRequest, success)
+NS_IMPL_EVENT_HANDLER(DOMRequest, error)
+
+NS_IMETHODIMP
+DOMRequest::GetReadyState(nsAString& aReadyState)
+{
+  DOMRequestReadyState readyState = ReadyState();
+  switch (readyState) {
+    case DOMRequestReadyState::Pending:
+      aReadyState.AssignLiteral("pending");
+      break;
+    case DOMRequestReadyState::Done:
+      aReadyState.AssignLiteral("done");
+      break;
+    default:
+      MOZ_CRASH("Unrecognized readyState.");
+  }
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+DOMRequest::GetResult(JS::MutableHandle<JS::Value> aResult)
+{
+  GetResult(nullptr, aResult);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+DOMRequest::GetError(nsISupports** aError)
+{
+  NS_IF_ADDREF(*aError = GetError());
+  return NS_OK;
+}
+
+void
+DOMRequest::FireSuccess(JS::Handle<JS::Value> aResult)
+{
+  NS_ASSERTION(!mDone, "mDone shouldn't have been set to true already!");
+  NS_ASSERTION(!mError, "mError shouldn't have been set!");
+  NS_ASSERTION(mResult == JSVAL_VOID, "mResult shouldn't have been set!");
+
+  mDone = true;
+  if (JSVAL_IS_GCTHING(aResult)) {
+    RootResultVal();
+  }
+  mResult = aResult;
+
+  FireEvent(NS_LITERAL_STRING("success"), false, false);
+}
+
+void
+DOMRequest::FireError(const nsAString& aError)
+{
+  NS_ASSERTION(!mDone, "mDone shouldn't have been set to true already!");
+  NS_ASSERTION(!mError, "mError shouldn't have been set!");
+  NS_ASSERTION(mResult == JSVAL_VOID, "mResult shouldn't have been set!");
+
+  mDone = true;
+  mError = new DOMError(GetOwner(), aError);
+
+  FireEvent(NS_LITERAL_STRING("error"), true, true);
+}
+
+void
+DOMRequest::FireError(nsresult aError)
+{
+  NS_ASSERTION(!mDone, "mDone shouldn't have been set to true already!");
+  NS_ASSERTION(!mError, "mError shouldn't have been set!");
+  NS_ASSERTION(mResult == JSVAL_VOID, "mResult shouldn't have been set!");
+
+  mDone = true;
+  mError = new DOMError(GetOwner(), aError);
+
+  FireEvent(NS_LITERAL_STRING("error"), true, true);
+}
+
+void
+DOMRequest::FireDetailedError(nsISupports* aError)
+{
+  NS_ASSERTION(!mDone, "mDone shouldn't have been set to true already!");
+  NS_ASSERTION(!mError, "mError shouldn't have been set!");
+  NS_ASSERTION(mResult == JSVAL_VOID, "mResult shouldn't have been set!");
+  NS_ASSERTION(aError, "No detailed error provided");
+
+  mDone = true;
+  mError = aError;
+
+  FireEvent(NS_LITERAL_STRING("error"), true, true);
+}
+
+void
+DOMRequest::FireEvent(const nsAString& aType, bool aBubble, bool aCancelable)
+{
+  if (NS_FAILED(CheckInnerWindowCorrectness())) {
+    return;
+  }
+
+  nsCOMPtr<nsIDOMEvent> event;
+  NS_NewDOMEvent(getter_AddRefs(event), this, nullptr, nullptr);
+  nsresult rv = event->InitEvent(aType, aBubble, aCancelable);
+  if (NS_FAILED(rv)) {
+    return;
+  }
+
+  event->SetTrusted(true);
+
+  bool dummy;
+  DispatchEvent(event, &dummy);
+}
+
+void
+DOMRequest::RootResultVal()
+{
+  mozilla::HoldJSObjects(this);
+}
+
+NS_IMPL_ISUPPORTS(DOMRequestService, nsIDOMRequestService)
+
+NS_IMETHODIMP
+DOMRequestService::CreateRequest(nsIDOMWindow* aWindow,
+                                 nsIDOMDOMRequest** aRequest)
+{
+  nsCOMPtr<nsPIDOMWindow> win(do_QueryInterface(aWindow));
+  NS_ENSURE_STATE(win);
+  NS_ADDREF(*aRequest = new DOMRequest(win));
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+DOMRequestService::CreateCursor(nsIDOMWindow* aWindow,
+                                nsICursorContinueCallback* aCallback,
+                                nsIDOMDOMCursor** aCursor)
+{
+  nsCOMPtr<nsPIDOMWindow> win(do_QueryInterface(aWindow));
+  NS_ENSURE_STATE(win);
+  NS_ADDREF(*aCursor = new DOMCursor(win, aCallback));
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+DOMRequestService::FireSuccess(nsIDOMDOMRequest* aRequest,
+                               JS::Handle<JS::Value> aResult)
+{
+  NS_ENSURE_STATE(aRequest);
+  static_cast<DOMRequest*>(aRequest)->FireSuccess(aResult);
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+DOMRequestService::FireError(nsIDOMDOMRequest* aRequest,
+                             const nsAString& aError)
+{
+  NS_ENSURE_STATE(aRequest);
+  static_cast<DOMRequest*>(aRequest)->FireError(aError);
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+DOMRequestService::FireDetailedError(nsIDOMDOMRequest* aRequest,
+                                     nsISupports* aError)
+{
+  NS_ENSURE_STATE(aRequest);
+  static_cast<DOMRequest*>(aRequest)->FireDetailedError(aError);
+
+  return NS_OK;
+}
+
+class FireSuccessAsyncTask : public nsRunnable
+{
+
+  FireSuccessAsyncTask(JSContext* aCx,
+                       DOMRequest* aRequest,
+                       const JS::Value& aResult) :
+    mReq(aRequest),
+    mResult(aCx, aResult)
+  {
+  }
+
+public:
+
+  // Due to the fact that initialization can fail during shutdown (since we
+  // can't fetch a js context), set up an initiatization function to make sure
+  // we can return the failure appropriately
+  static nsresult
+  Dispatch(DOMRequest* aRequest,
+           const JS::Value& aResult)
+  {
+    NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
+    AutoSafeJSContext cx;
+    nsRefPtr<FireSuccessAsyncTask> asyncTask = new FireSuccessAsyncTask(cx, aRequest, aResult);
+    if (NS_FAILED(NS_DispatchToMainThread(asyncTask))) {
+      NS_WARNING("Failed to dispatch to main thread!");
+      return NS_ERROR_FAILURE;
+    }
+    return NS_OK;
+  }
+
+  NS_IMETHODIMP
+  Run()
+  {
+    mReq->FireSuccess(JS::Handle<JS::Value>::fromMarkedLocation(mResult.address()));
+    return NS_OK;
+  }
+
+  ~FireSuccessAsyncTask()
+  {
+    NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
+  }
+
+private:
+  nsRefPtr<DOMRequest> mReq;
+  JS::PersistentRooted<JS::Value> mResult;
+};
+
+class FireErrorAsyncTask : public nsRunnable
+{
+public:
+  FireErrorAsyncTask(DOMRequest* aRequest,
+                     const nsAString& aError) :
+    mReq(aRequest),
+    mError(aError)
+  {
+  }
+
+  NS_IMETHODIMP
+  Run()
+  {
+    mReq->FireError(mError);
+    return NS_OK;
+  }
+private:
+  nsRefPtr<DOMRequest> mReq;
+  nsString mError;
+};
+
+NS_IMETHODIMP
+DOMRequestService::FireSuccessAsync(nsIDOMDOMRequest* aRequest,
+                                    JS::Handle<JS::Value> aResult)
+{
+  NS_ENSURE_STATE(aRequest);
+  return FireSuccessAsyncTask::Dispatch(static_cast<DOMRequest*>(aRequest), aResult);
+}
+
+NS_IMETHODIMP
+DOMRequestService::FireErrorAsync(nsIDOMDOMRequest* aRequest,
+                                  const nsAString& aError)
+{
+  NS_ENSURE_STATE(aRequest);
+  nsCOMPtr<nsIRunnable> asyncTask =
+    new FireErrorAsyncTask(static_cast<DOMRequest*>(aRequest), aError);
+  if (NS_FAILED(NS_DispatchToMainThread(asyncTask))) {
+    NS_WARNING("Failed to dispatch to main thread!");
+    return NS_ERROR_FAILURE;
+  }
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+DOMRequestService::FireDone(nsIDOMDOMCursor* aCursor) {
+  NS_ENSURE_STATE(aCursor);
+  static_cast<DOMCursor*>(aCursor)->FireDone();
+
+  return NS_OK;
+}