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(MozPromiseRejectOnDestructionBase)
  17
  18 NS_IMPL_ISUPPORTS0(DomPromiseListener)
  19
  20 DomPromiseListener::DomPromiseListener(CallbackTypeResolved&& aResolve,
  21                                        CallbackTypeRejected&& aReject)
  22     : mResolve(std::move(aResolve)), mReject(std::move(aReject)) {}
  23
  24 DomPromiseListener::~DomPromiseListener() {
  25   if (mReject) {
  26     mReject(NS_BINDING_ABORTED);
  27   }
  28 }
  29
  30 void DomPromiseListener::ResolvedCallback(JSContext* aCx,
  31                                           JS::Handle<JS::Value> aValue,
  32                                           ErrorResult& aRv) {
  33   if (mResolve) {
  34     mResolve(aCx, aValue);
  35   }
  36   // Let's clear the lambdas in case we have a cycle to ourselves.
  37   Clear();
  38 }
  39
  40 void DomPromiseListener::RejectedCallback(JSContext* aCx,
  41                                           JS::Handle<JS::Value> aValue,
  42                                           ErrorResult& aRv) {
  43   if (mReject) {
  44     nsresult errorCode = NS_ERROR_DOM_NOT_NUMBER_ERR;
  45     if (aValue.isInt32()) {
  46       errorCode = nsresult(aValue.toInt32());
  47     } else if (aValue.isObject()) {
  48       RefPtr<::mozilla::dom::DOMException> domException;
  49       UNWRAP_OBJECT(DOMException, aValue, domException);
  50       if (domException) {
  51         errorCode = domException->GetResult();
  52       }
  53     }
  54     mReject(errorCode);
  55   }
  56   // Let's clear the lambdas in case we have a cycle to ourselves.
  57   Clear();
  58 }
  59
  60 void DomPromiseListener::Clear() {
  61   mResolve = nullptr;
  62   mReject = nullptr;
  63 }
  64
  65 }  // namespace mozilla::dom