Add m-esr52 at 52.6.0

1 files changed, 382 insertions, 0 deletions

diff --git a/dom/base/DOMRequest.cpp b/dom/base/DOMRequest.cpp
new file mode 100644
index 000000000..ce6cd1dcd
--- /dev/null
+++ b/dom/base/DOMRequest.cpp
@@ -0,0 +1,382 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=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 "nsThreadUtils.h"
+#include "DOMCursor.h"
+#include "mozilla/ErrorResult.h"
+#include "mozilla/dom/Event.h"
+#include "mozilla/dom/Promise.h"
+#include "mozilla/dom/ScriptSettings.h"
+#include "jsfriendapi.h"
+#include "nsContentUtils.h"
+
+using mozilla::dom::AnyCallback;
+using mozilla::dom::DOMError;
+using mozilla::dom::DOMRequest;
+using mozilla::dom::DOMRequestService;
+using mozilla::dom::DOMCursor;
+using mozilla::dom::Promise;
+using mozilla::dom::AutoJSAPI;
+using mozilla::dom::RootingCx;
+
+DOMRequest::DOMRequest(nsPIDOMWindowInner* aWindow)
+  : DOMEventTargetHelper(aWindow)
+  , mResult(JS::UndefinedValue())
+  , mDone(false)
+{
+}
+
+DOMRequest::DOMRequest(nsIGlobalObject* aGlobal)
+  : DOMEventTargetHelper(aGlobal)
+  , mResult(JS::UndefinedValue())
+  , mDone(false)
+{
+}
+
+DOMRequest::~DOMRequest()
+{
+  mResult.setUndefined();
+  mozilla::DropJSObjects(this);
+}
+
+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(mPromise)
+NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
+
+NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(DOMRequest,
+                                                DOMEventTargetHelper)
+  NS_IMPL_CYCLE_COLLECTION_UNLINK(mError)
+  NS_IMPL_CYCLE_COLLECTION_UNLINK(mPromise)
+  tmp->mResult.setUndefined();
+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_JS_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, JS::Handle<JSObject*> aGivenProto)
+{
+  return DOMRequestBinding::Wrap(aCx, this, aGivenProto);
+}
+
+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.isUndefined(), "mResult shouldn't have been set!");
+
+  mDone = true;
+  if (aResult.isGCThing()) {
+    RootResultVal();
+  }
+  mResult = aResult;
+
+  FireEvent(NS_LITERAL_STRING("success"), false, false);
+
+  if (mPromise) {
+    mPromise->MaybeResolve(mResult);
+  }
+}
+
+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.isUndefined(), "mResult shouldn't have been set!");
+
+  mDone = true;
+  mError = new DOMError(GetOwner(), aError);
+
+  FireEvent(NS_LITERAL_STRING("error"), true, true);
+
+  if (mPromise) {
+    mPromise->MaybeRejectBrokenly(mError);
+  }
+}
+
+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.isUndefined(), "mResult shouldn't have been set!");
+
+  mDone = true;
+  mError = new DOMError(GetOwner(), aError);
+
+  FireEvent(NS_LITERAL_STRING("error"), true, true);
+
+  if (mPromise) {
+    mPromise->MaybeRejectBrokenly(mError);
+  }
+}
+
+void
+DOMRequest::FireDetailedError(DOMError* 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.isUndefined(), "mResult shouldn't have been set!");
+  NS_ASSERTION(aError, "No detailed error provided");
+
+  mDone = true;
+  mError = aError;
+
+  FireEvent(NS_LITERAL_STRING("error"), true, true);
+
+  if (mPromise) {
+    mPromise->MaybeRejectBrokenly(mError);
+  }
+}
+
+void
+DOMRequest::FireEvent(const nsAString& aType, bool aBubble, bool aCancelable)
+{
+  if (NS_FAILED(CheckInnerWindowCorrectness())) {
+    return;
+  }
+
+  RefPtr<Event> event = NS_NewDOMEvent(this, nullptr, nullptr);
+  event->InitEvent(aType, aBubble, aCancelable);
+  event->SetTrusted(true);
+
+  bool dummy;
+  DispatchEvent(event, &dummy);
+}
+
+void
+DOMRequest::RootResultVal()
+{
+  mozilla::HoldJSObjects(this);
+}
+
+void
+DOMRequest::Then(JSContext* aCx, AnyCallback* aResolveCallback,
+                 AnyCallback* aRejectCallback,
+                 JS::MutableHandle<JS::Value> aRetval,
+                 mozilla::ErrorResult& aRv)
+{
+  if (!mPromise) {
+    mPromise = Promise::Create(DOMEventTargetHelper::GetParentObject(), aRv);
+    if (aRv.Failed()) {
+      return;
+    }
+    if (mDone) {
+      // Since we create mPromise lazily, it's possible that the DOMRequest object
+      // has already fired its success/error event.  In that case we should
+      // manually resolve/reject mPromise here.  mPromise will take care of
+      // calling the callbacks on |promise| as needed.
+      if (mError) {
+        mPromise->MaybeRejectBrokenly(mError);
+      } else {
+        mPromise->MaybeResolve(mResult);
+      }
+    }
+  }
+
+  // Just use the global of the Promise itself as the callee global.
+  JS::Rooted<JSObject*> global(aCx, mPromise->PromiseObj());
+  global = js::GetGlobalForObjectCrossCompartment(global);
+  mPromise->Then(aCx, global, aResolveCallback, aRejectCallback, aRetval, aRv);
+}
+
+NS_IMPL_ISUPPORTS(DOMRequestService, nsIDOMRequestService)
+
+NS_IMETHODIMP
+DOMRequestService::CreateRequest(mozIDOMWindow* aWindow,
+                                 nsIDOMDOMRequest** aRequest)
+{
+  MOZ_ASSERT(NS_IsMainThread());
+  NS_ENSURE_STATE(aWindow);
+  auto* win = nsPIDOMWindowInner::From(aWindow);
+  NS_ADDREF(*aRequest = new DOMRequest(win));
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+DOMRequestService::CreateCursor(mozIDOMWindow* aWindow,
+                                nsICursorContinueCallback* aCallback,
+                                nsIDOMDOMCursor** aCursor)
+{
+  NS_ENSURE_STATE(aWindow);
+  auto* win = nsPIDOMWindowInner::From(aWindow);
+  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);
+  nsCOMPtr<DOMError> err = do_QueryInterface(aError);
+  NS_ENSURE_STATE(err);
+  static_cast<DOMRequest*>(aRequest)->FireDetailedError(err);
+
+  return NS_OK;
+}
+
+class FireSuccessAsyncTask : public mozilla::Runnable
+{
+
+  FireSuccessAsyncTask(DOMRequest* aRequest,
+                       const JS::Value& aResult) :
+    mReq(aRequest),
+    mResult(RootingCx(), 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)
+  {
+    RefPtr<FireSuccessAsyncTask> asyncTask =
+      new FireSuccessAsyncTask(aRequest, aResult);
+    MOZ_ALWAYS_SUCCEEDS(NS_DispatchToCurrentThread(asyncTask));
+    return NS_OK;
+  }
+
+  NS_IMETHOD
+  Run() override
+  {
+    mReq->FireSuccess(JS::Handle<JS::Value>::fromMarkedLocation(mResult.address()));
+    return NS_OK;
+  }
+
+private:
+  RefPtr<DOMRequest> mReq;
+  JS::PersistentRooted<JS::Value> mResult;
+};
+
+class FireErrorAsyncTask : public mozilla::Runnable
+{
+public:
+  FireErrorAsyncTask(DOMRequest* aRequest,
+                     const nsAString& aError) :
+    mReq(aRequest),
+    mError(aError)
+  {
+  }
+
+  NS_IMETHOD
+  Run() override
+  {
+    mReq->FireError(mError);
+    return NS_OK;
+  }
+private:
+  RefPtr<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);
+  MOZ_ALWAYS_SUCCEEDS(NS_DispatchToCurrentThread(asyncTask));
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+DOMRequestService::FireDone(nsIDOMDOMCursor* aCursor) {
+  NS_ENSURE_STATE(aCursor);
+  static_cast<DOMCursor*>(aCursor)->FireDone();
+
+  return NS_OK;
+}