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d5f6f72d7b
--HG-- extra : rebase_source : 72c1a87a6352005765442ea8903cfa16da8608fd extra : amend_source : 71b6af7c8446cd501bc337d50a345f24814f20db
203 lines
6.0 KiB
C++
203 lines
6.0 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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#include "nsPIDOMWindow.h"
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#include "js/TypeDecls.h"
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namespace mozilla {
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namespace dom {
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class AnyCallback;
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class PromiseCallback;
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class PromiseInit;
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class PromiseNativeHandler;
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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 NativePromiseCallback;
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friend class PromiseResolverMixin;
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friend class PromiseResolverTask;
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friend class PromiseTask;
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friend class RejectPromiseCallback;
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friend class ResolvePromiseCallback;
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friend class WorkerPromiseResolverTask;
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friend class WorkerPromiseTask;
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friend class WrapperPromiseCallback;
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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 EnabledForScope(JSContext* aCx, JSObject* /* unused */);
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void MaybeResolve(JSContext* aCx,
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JS::Handle<JS::Value> aValue);
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void MaybeReject(JSContext* aCx,
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JS::Handle<JS::Value> aValue);
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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, 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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const Optional<JS::Handle<JS::Value>>& aValue, ErrorResult& aRv);
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static already_AddRefed<Promise>
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Resolve(nsPIDOMWindow* aWindow, 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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const Optional<JS::Handle<JS::Value>>& aValue, ErrorResult& aRv);
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static already_AddRefed<Promise>
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Reject(nsPIDOMWindow* aWindow, 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<nsRefPtr<AnyCallback>>& aResolveCallback,
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const Optional<nsRefPtr<AnyCallback>>& aRejectCallback);
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already_AddRefed<Promise>
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Catch(const Optional<nsRefPtr<AnyCallback>>& aRejectCallback);
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// FIXME(nsm): Bug 956197
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static already_AddRefed<Promise>
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All(const GlobalObject& aGlobal, JSContext* aCx,
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const Sequence<JS::Value>& aIterable, ErrorResult& aRv);
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static already_AddRefed<Promise>
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Cast(const GlobalObject& aGlobal, JSContext* aCx,
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const Optional<JS::Handle<JS::Value>>& aValue, ErrorResult& aRv);
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// FIXME(nsm): Bug 956197
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static already_AddRefed<Promise>
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Race(const GlobalObject& aGlobal, JSContext* aCx,
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const Sequence<JS::Value>& aIterable, ErrorResult& aRv);
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void AppendNativeHandler(PromiseNativeHandler* aRunnable);
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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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enum PromiseTaskSync {
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SyncTask,
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AsyncTask
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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 RunResolveTask(JS::Handle<JS::Value> aValue,
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Promise::PromiseState aState,
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PromiseTaskSync aAsynchronous);
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void AppendCallbacks(PromiseCallback* aResolveCallback,
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PromiseCallback* aRejectCallback);
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// If we have been rejected and our mResult is a JS exception,
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// report it to the error console.
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void MaybeReportRejected();
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void MaybeResolveInternal(JSContext* aCx,
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JS::Handle<JS::Value> aValue,
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PromiseTaskSync aSync = AsyncTask);
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void MaybeRejectInternal(JSContext* aCx,
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JS::Handle<JS::Value> aValue,
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PromiseTaskSync aSync = AsyncTask);
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void ResolveInternal(JSContext* aCx,
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JS::Handle<JS::Value> aValue,
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PromiseTaskSync aSync = AsyncTask);
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void RejectInternal(JSContext* aCx,
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JS::Handle<JS::Value> aValue,
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PromiseTaskSync aSync = AsyncTask);
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// Static methods for the PromiseInit functions.
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static bool
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JSCallback(JSContext *aCx, unsigned aArgc, JS::Value *aVp);
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static bool
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ThenableResolverCommon(JSContext* aCx, uint32_t /* PromiseCallback::Task */ aTask,
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unsigned aArgc, JS::Value* aVp);
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static bool
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JSCallbackThenableResolver(JSContext *aCx, unsigned aArgc, JS::Value *aVp);
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static bool
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JSCallbackThenableRejecter(JSContext *aCx, unsigned aArgc, JS::Value *aVp);
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static JSObject*
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CreateFunction(JSContext* aCx, JSObject* aParent, Promise* aPromise,
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int32_t aTask);
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static JSObject*
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CreateThenableFunction(JSContext* aCx, Promise* aPromise, uint32_t aTask);
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void HandleException(JSContext* aCx);
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nsRefPtr<nsPIDOMWindow> mWindow;
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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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bool mHadRejectCallback;
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bool mResolvePending;
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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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