dom/promise/PromiseNativeHandler.cpp

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #include "PromiseNativeHandler.h"
   8 #include "mozilla/dom/BindingUtils.h"
   9 #include "mozilla/dom/Promise.h"
  10 #include "mozilla/dom/DOMException.h"
  11 #include "mozilla/dom/DOMExceptionBinding.h"
  12 #include "nsISupportsImpl.h"
  13
  14 namespace mozilla::dom {
  15
  16 NS_IMPL_ISUPPORTS0(DomPromiseListener)
  17
  18 DomPromiseListener::DomPromiseListener(CallbackTypeResolved&& aResolve,
  19                                        CallbackTypeRejected&& aReject)
  20     : mResolve(std::move(aResolve)), mReject(std::move(aReject)) {}
  21
  22 DomPromiseListener::~DomPromiseListener() {
  23   if (mReject) {
  24     mReject(NS_BINDING_ABORTED);
  25   }
  26 }
  27
  28 void DomPromiseListener::ResolvedCallback(JSContext* aCx,
  29                                           JS::Handle<JS::Value> aValue,
  30                                           ErrorResult& aRv) {
  31   if (mResolve) {
  32     mResolve(aCx, aValue);
  33   }
  34   // Let's clear the lambdas in case we have a cycle to ourselves.
  35   Clear();
  36 }
  37
  38 void DomPromiseListener::RejectedCallback(JSContext* aCx,
  39                                           JS::Handle<JS::Value> aValue,
  40                                           ErrorResult& aRv) {
  41   if (mReject) {
  42     nsresult errorCode = NS_ERROR_DOM_NOT_NUMBER_ERR;
  43     if (aValue.isInt32()) {
  44       errorCode = nsresult(aValue.toInt32());
  45     } else if (aValue.isObject()) {
  46       RefPtr<::mozilla::dom::DOMException> domException;
  47       UNWRAP_OBJECT(DOMException, aValue, domException);
  48       if (domException) {
  49         errorCode = domException->GetResult();
  50       }
  51     }
  52     mReject(errorCode);
  53   }
  54   // Let's clear the lambdas in case we have a cycle to ourselves.
  55   Clear();
  56 }
  57
  58 void DomPromiseListener::Clear() {
  59   mResolve = nullptr;
  60   mReject = nullptr;
  61 }
  62
  63 }  // namespace mozilla::dom