1 files changed, 63 insertions, 0 deletions
diff --git a/dom/promise/PromiseNativeHandler.cpp b/dom/promise/PromiseNativeHandler.cpp
new file mode 100644
index 0000000000..88f7edef3a
--- /dev/null
+++ b/dom/promise/PromiseNativeHandler.cpp
@@ -0,0 +1,63 @@
+/* -*- 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 "PromiseNativeHandler.h"
+#include "mozilla/dom/BindingUtils.h"
+#include "mozilla/dom/Promise.h"
+#include "mozilla/dom/DOMException.h"
+#include "mozilla/dom/DOMExceptionBinding.h"
+#include "nsISupportsImpl.h"
+
+namespace mozilla::dom {
+
+NS_IMPL_ISUPPORTS0(DomPromiseListener)
+
+DomPromiseListener::DomPromiseListener(CallbackTypeResolved&& aResolve,
+                                       CallbackTypeRejected&& aReject)
+    : mResolve(std::move(aResolve)), mReject(std::move(aReject)) {}
+
+DomPromiseListener::~DomPromiseListener() {
+  if (mReject) {
+    mReject(NS_BINDING_ABORTED);
+  }
+}
+
+void DomPromiseListener::ResolvedCallback(JSContext* aCx,
+                                          JS::Handle<JS::Value> aValue,
+                                          ErrorResult& aRv) {
+  if (mResolve) {
+    mResolve(aCx, aValue);
+  }
+  // Let's clear the lambdas in case we have a cycle to ourselves.
+  Clear();
+}
+
+void DomPromiseListener::RejectedCallback(JSContext* aCx,
+                                          JS::Handle<JS::Value> aValue,
+                                          ErrorResult& aRv) {
+  if (mReject) {
+    nsresult errorCode = NS_ERROR_DOM_NOT_NUMBER_ERR;
+    if (aValue.isInt32()) {
+      errorCode = nsresult(aValue.toInt32());
+    } else if (aValue.isObject()) {
+      RefPtr<::mozilla::dom::DOMException> domException;
+      UNWRAP_OBJECT(DOMException, aValue, domException);
+      if (domException) {
+        errorCode = domException->GetResult();
+      }
+    }
+    mReject(errorCode);
+  }
+  // Let's clear the lambdas in case we have a cycle to ourselves.
+  Clear();
+}
+
+void DomPromiseListener::Clear() {
+  mResolve = nullptr;
+  mReject = nullptr;
+}
+
+}  // namespace mozilla::dom