Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 256 insertions, 0 deletions

diff --git a/dom/base/DOMRequest.cpp b/dom/base/DOMRequest.cpp
new file mode 100644
index 0000000000..93c1d75d89
--- /dev/null
+++ b/dom/base/DOMRequest.cpp
@@ -0,0 +1,256 @@
+/* -*- 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 "DOMException.h"
+#include "nsThreadUtils.h"
+#include "mozilla/HoldDropJSObjects.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::AutoJSAPI;
+using mozilla::dom::DOMException;
+using mozilla::dom::DOMRequest;
+using mozilla::dom::DOMRequestService;
+using mozilla::dom::Promise;
+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() { mozilla::DropJSObjects(this); }
+
+NS_IMPL_CYCLE_COLLECTION_INHERITED_WITH_JS_MEMBERS(DOMRequest,
+                                                   DOMEventTargetHelper,
+                                                   (mError, mPromise),
+                                                   (mResult))
+
+NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(DOMRequest)
+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 DOMRequest_Binding::Wrap(aCx, this, aGivenProto);
+}
+
+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(u"success"_ns, 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;
+  // XXX Error code chosen arbitrarily
+  mError = DOMException::Create(NS_ERROR_DOM_UNKNOWN_ERR,
+                                NS_ConvertUTF16toUTF8(aError));
+
+  FireEvent(u"error"_ns, 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 = DOMException::Create(aError);
+
+  FireEvent(u"error"_ns, true, true);
+
+  if (mPromise) {
+    mPromise->MaybeRejectBrokenly(mError);
+  }
+}
+
+void DOMRequest::FireDetailedError(DOMException& 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 = &aError;
+
+  FireEvent(u"error"_ns, true, true);
+
+  if (mPromise) {
+    mPromise->MaybeRejectBrokenly(mError);
+  }
+}
+
+void DOMRequest::FireEvent(const nsAString& aType, bool aBubble,
+                           bool aCancelable) {
+  if (NS_FAILED(CheckCurrentGlobalCorrectness())) {
+    return;
+  }
+
+  RefPtr<Event> event = NS_NewDOMEvent(this, nullptr, nullptr);
+  event->InitEvent(aType, aBubble, aCancelable);
+  event->SetTrusted(true);
+
+  DispatchEvent(*event);
+}
+
+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::GetNonCCWObjectGlobal(global);
+  mPromise->Then(aCx, global, aResolveCallback, aRejectCallback, aRetval, aRv);
+}
+
+NS_IMPL_ISUPPORTS(DOMRequestService, nsIDOMRequestService)
+
+NS_IMETHODIMP
+DOMRequestService::CreateRequest(mozIDOMWindow* aWindow,
+                                 DOMRequest** aRequest) {
+  MOZ_ASSERT(NS_IsMainThread());
+  NS_ENSURE_STATE(aWindow);
+  auto* win = nsPIDOMWindowInner::From(aWindow);
+  RefPtr<DOMRequest> req = new DOMRequest(win);
+  req.forget(aRequest);
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+DOMRequestService::FireSuccess(DOMRequest* aRequest,
+                               JS::Handle<JS::Value> aResult) {
+  NS_ENSURE_STATE(aRequest);
+  aRequest->FireSuccess(aResult);
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+DOMRequestService::FireError(DOMRequest* aRequest, const nsAString& aError) {
+  NS_ENSURE_STATE(aRequest);
+  aRequest->FireError(aError);
+
+  return NS_OK;
+}
+
+class FireSuccessAsyncTask : public mozilla::Runnable {
+  FireSuccessAsyncTask(DOMRequest* aRequest, const JS::Value& aResult)
+      : mozilla::Runnable("FireSuccessAsyncTask"),
+        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)
+      : mozilla::Runnable("FireErrorAsyncTask"),
+        mReq(aRequest),
+        mError(aError) {}
+
+  NS_IMETHOD
+  Run() override {
+    mReq->FireError(mError);
+    return NS_OK;
+  }
+
+ private:
+  RefPtr<DOMRequest> mReq;
+  nsString mError;
+};
+
+NS_IMETHODIMP
+DOMRequestService::FireSuccessAsync(DOMRequest* aRequest,
+                                    JS::Handle<JS::Value> aResult) {
+  NS_ENSURE_STATE(aRequest);
+  return FireSuccessAsyncTask::Dispatch(aRequest, aResult);
+}
+
+NS_IMETHODIMP
+DOMRequestService::FireErrorAsync(DOMRequest* aRequest,
+                                  const nsAString& aError) {
+  NS_ENSURE_STATE(aRequest);
+  nsCOMPtr<nsIRunnable> asyncTask = new FireErrorAsyncTask(aRequest, aError);
+  MOZ_ALWAYS_SUCCEEDS(NS_DispatchToCurrentThread(asyncTask));
+  return NS_OK;
+}