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119 lines
3.0 KiB
C++
119 lines
3.0 KiB
C++
/* -*- Mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; tab-width: 40 -*- */
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/* vim: set ts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef mozilla_dom_Promise_h
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#define mozilla_dom_Promise_h
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#include "mozilla/Attributes.h"
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#include "mozilla/ErrorResult.h"
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#include "mozilla/dom/BindingDeclarations.h"
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#include "nsCycleCollectionParticipant.h"
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#include "mozilla/dom/PromiseBinding.h"
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#include "nsWrapperCache.h"
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#include "nsAutoPtr.h"
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struct JSContext;
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class nsPIDOMWindow;
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namespace mozilla {
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namespace dom {
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class PromiseInit;
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class PromiseCallback;
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class AnyCallback;
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class PromiseResolver;
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class Promise MOZ_FINAL : public nsISupports,
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public nsWrapperCache
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{
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friend class PromiseTask;
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friend class PromiseResolver;
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friend class PromiseResolverTask;
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public:
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NS_DECL_CYCLE_COLLECTING_ISUPPORTS
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NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS(Promise)
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Promise(nsPIDOMWindow* aWindow);
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~Promise();
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static bool PrefEnabled();
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// WebIDL
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nsPIDOMWindow* GetParentObject() const
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{
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return mWindow;
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}
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virtual JSObject*
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WrapObject(JSContext* aCx, JS::Handle<JSObject*> aScope) MOZ_OVERRIDE;
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static already_AddRefed<Promise>
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Constructor(const GlobalObject& aGlobal, JSContext* aCx, PromiseInit& aInit,
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ErrorResult& aRv);
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static already_AddRefed<Promise>
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Resolve(const GlobalObject& aGlobal, JSContext* aCx,
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JS::Handle<JS::Value> aValue, ErrorResult& aRv);
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static already_AddRefed<Promise>
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Reject(const GlobalObject& aGlobal, JSContext* aCx,
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JS::Handle<JS::Value> aValue, ErrorResult& aRv);
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already_AddRefed<Promise>
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Then(const Optional<OwningNonNull<AnyCallback> >& aResolveCallback,
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const Optional<OwningNonNull<AnyCallback> >& aRejectCallback);
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already_AddRefed<Promise>
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Catch(const Optional<OwningNonNull<AnyCallback> >& aRejectCallback);
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private:
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enum PromiseState {
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Pending,
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Resolved,
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Rejected
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};
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void SetState(PromiseState aState)
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{
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MOZ_ASSERT(mState == Pending);
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MOZ_ASSERT(aState != Pending);
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mState = aState;
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}
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void SetResult(JS::Handle<JS::Value> aValue)
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{
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mResult = aValue;
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}
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// This method processes promise's resolve/reject callbacks with promise's
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// result. It's executed when the resolver.resolve() or resolver.reject() is
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// called or when the promise already has a result and new callbacks are
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// appended by then(), catch() or done().
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void RunTask();
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void AppendCallbacks(PromiseCallback* aResolveCallback,
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PromiseCallback* aRejectCallback);
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nsRefPtr<nsPIDOMWindow> mWindow;
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nsRefPtr<PromiseResolver> mResolver;
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nsTArray<nsRefPtr<PromiseCallback> > mResolveCallbacks;
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nsTArray<nsRefPtr<PromiseCallback> > mRejectCallbacks;
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JS::Heap<JS::Value> mResult;
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PromiseState mState;
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bool mTaskPending;
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};
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} // namespace dom
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} // namespace mozilla
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#endif // mozilla_dom_Promise_h
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