toolkit/components/antitracking/bouncetrackingprotection/PromiseNativeWrapper.h

   1 /* This Source Code Form is subject to the terms of the Mozilla Public
   2  * License, v. 2.0. If a copy of the MPL was not distributed with this
   3  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   4 #ifndef mozilla_PromiseNativeWrapper_h__
   5 #define mozilla_PromiseNativeWrapper_h__
   6
   7 #include "mozilla/MozPromise.h"
   8 #include "mozilla/dom/Promise.h"
   9 #include "nsISupports.h"
  10 #include "mozilla/dom/PromiseNativeHandler.h"
  11
  12 namespace mozilla {
  13
  14 // Helper for wrapping JS promises in MozPromise so they can be handled from C++
  15 // side.
  16 class PromiseNativeWrapper : public dom::PromiseNativeHandler {
  17  public:
  18   NS_DECL_ISUPPORTS
  19
  20   explicit PromiseNativeWrapper(
  21       MozPromiseHolder<GenericNonExclusivePromise>&& aHolder)
  22       : mHolder(std::move(aHolder)) {}
  23
  24   void ResolvedCallback(JSContext* aCx, JS::Handle<JS::Value> aValue,
  25                         ErrorResult& aRv) override {
  26     mHolder.Resolve(true, __func__);
  27   }
  28
  29   void RejectedCallback(JSContext* aCx, JS::Handle<JS::Value> aValue,
  30                         ErrorResult& aRv) override {
  31     mHolder.Reject(NS_ERROR_FAILURE, __func__);
  32   }
  33
  34   static RefPtr<GenericNonExclusivePromise> ConvertJSPromiseToMozPromise(
  35       const RefPtr<dom::Promise>& jsPromise);
  36
  37  private:
  38   ~PromiseNativeWrapper() = default;
  39   MozPromiseHolder<GenericNonExclusivePromise> mHolder;
  40 };
  41
  42 }  // namespace mozilla
  43
  44 #endif