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/Promise.h"
   9 #include "nsISupportsImpl.h"
  10
  11 namespace mozilla {
  12 namespace dom {
  13
  14 NS_IMPL_ISUPPORTS0(DomPromiseListener)
  15
  16 DomPromiseListener::DomPromiseListener(dom::Promise* aDOMPromise) {
  17   aDOMPromise->AppendNativeHandler(this);
  18 }
  19
  20 DomPromiseListener::DomPromiseListener(dom::Promise* aDOMPromise,
  21                                        CallbackTypeResolved&& aResolve,
  22                                        CallbackTypeRejected&& aReject)
  23     : mResolve(Some(std::move(aResolve))), mReject(Some(std::move(aReject))) {
  24   aDOMPromise->AppendNativeHandler(this);
  25 }
  26
  27 DomPromiseListener::~DomPromiseListener() {
  28   if (mReject) {
  29     (*mReject)(NS_BINDING_ABORTED);
  30   }
  31 }
  32
  33 void DomPromiseListener::ResolvedCallback(JSContext* aCx,
  34                                           JS::Handle<JS::Value> aValue) {
  35   if (mResolve) {
  36     (*mResolve)(aCx, aValue);
  37   }
  38   // Let's clear the lambdas in case we have a cycle to ourselves.
  39   mResolve.reset();
  40   mReject.reset();
  41 }
  42
  43 void DomPromiseListener::RejectedCallback(JSContext* aCx,
  44                                           JS::Handle<JS::Value> aValue) {
  45   if (mReject) {
  46     nsresult errorCode;
  47     if (!aValue.isInt32()) {
  48       errorCode = NS_ERROR_DOM_NOT_NUMBER_ERR;
  49     } else {
  50       errorCode = nsresult(aValue.toInt32());
  51     }
  52     (*mReject)(errorCode);
  53   }
  54   // Let's clear the lambdas in case we have a cycle to ourselves.
  55   mResolve.reset();
  56   mReject.reset();
  57 }
  58
  59 void DomPromiseListener::SetResolvers(CallbackTypeResolved&& aResolve,
  60                                       CallbackTypeRejected&& aReject) {
  61   mResolve = Some(std::move(aResolve));
  62   mReject = Some(std::move(aReject));
  63 }
  64
  65 }  // namespace dom
  66 }  // namespace mozilla