mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
synced 2024-09-13 09:24:08 -07:00
251 lines
6.8 KiB
C++
251 lines
6.8 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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#include "mozilla/dom/Promise.h"
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#include "mozilla/dom/PromiseBinding.h"
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#include "mozilla/dom/PromiseResolver.h"
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#include "mozilla/Preferences.h"
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#include "PromiseCallback.h"
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#include "nsContentUtils.h"
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#include "nsPIDOMWindow.h"
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namespace mozilla {
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namespace dom {
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// PromiseTask
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// This class processes the promise's callbacks with promise's result.
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class PromiseTask MOZ_FINAL : public nsRunnable
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{
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public:
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PromiseTask(Promise* aPromise)
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: mPromise(aPromise)
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{
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MOZ_ASSERT(aPromise);
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MOZ_COUNT_CTOR(PromiseTask);
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}
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~PromiseTask()
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{
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MOZ_COUNT_DTOR(PromiseTask);
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}
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NS_IMETHOD Run()
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{
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mPromise->mTaskPending = false;
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mPromise->RunTask();
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return NS_OK;
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}
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private:
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nsRefPtr<Promise> mPromise;
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};
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// Promise
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NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(Promise)
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NS_IMPL_CYCLE_COLLECTION_UNLINK(mWindow)
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NS_IMPL_CYCLE_COLLECTION_UNLINK(mResolver)
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NS_IMPL_CYCLE_COLLECTION_UNLINK(mResolveCallbacks);
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NS_IMPL_CYCLE_COLLECTION_UNLINK(mRejectCallbacks);
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tmp->mResult = JSVAL_VOID;
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NS_IMPL_CYCLE_COLLECTION_UNLINK_PRESERVED_WRAPPER
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NS_IMPL_CYCLE_COLLECTION_UNLINK_END
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(Promise)
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mWindow)
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mResolver)
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mResolveCallbacks);
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mRejectCallbacks);
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_SCRIPT_OBJECTS
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
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NS_IMPL_CYCLE_COLLECTION_TRACE_BEGIN(Promise)
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NS_IMPL_CYCLE_COLLECTION_TRACE_JSVAL_MEMBER_CALLBACK(mResult)
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NS_IMPL_CYCLE_COLLECTION_TRACE_PRESERVED_WRAPPER
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NS_IMPL_CYCLE_COLLECTION_TRACE_END
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NS_IMPL_CYCLE_COLLECTING_ADDREF(Promise)
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NS_IMPL_CYCLE_COLLECTING_RELEASE(Promise)
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NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(Promise)
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NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
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NS_INTERFACE_MAP_ENTRY(nsISupports)
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NS_INTERFACE_MAP_END
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Promise::Promise(nsPIDOMWindow* aWindow)
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: mWindow(aWindow)
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, mResult(JS::UndefinedValue())
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, mState(Pending)
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, mTaskPending(false)
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{
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MOZ_COUNT_CTOR(Promise);
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NS_HOLD_JS_OBJECTS(this, Promise);
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SetIsDOMBinding();
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mResolver = new PromiseResolver(this);
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}
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Promise::~Promise()
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{
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mResult = JSVAL_VOID;
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NS_DROP_JS_OBJECTS(this, Promise);
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MOZ_COUNT_DTOR(Promise);
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}
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JSObject*
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Promise::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aScope)
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{
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return PromiseBinding::Wrap(aCx, aScope, this);
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}
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/* static */ bool
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Promise::PrefEnabled()
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{
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return Preferences::GetBool("dom.promise.enabled", false);
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}
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/* static */ already_AddRefed<Promise>
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Promise::Constructor(const GlobalObject& aGlobal, JSContext* aCx,
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PromiseInit& aInit, ErrorResult& aRv)
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{
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MOZ_ASSERT(PrefEnabled());
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nsCOMPtr<nsPIDOMWindow> window = do_QueryInterface(aGlobal.Get());
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if (!window) {
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aRv.Throw(NS_ERROR_UNEXPECTED);
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return nullptr;
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}
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nsRefPtr<Promise> promise = new Promise(window);
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aInit.Call(promise, *promise->mResolver, aRv,
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CallbackObject::eRethrowExceptions);
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aRv.WouldReportJSException();
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if (aRv.IsJSException()) {
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Optional<JS::Handle<JS::Value> > value(aCx);
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aRv.StealJSException(aCx, &value.Value());
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promise->mResolver->Reject(aCx, value);
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}
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return promise.forget();
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}
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/* static */ already_AddRefed<Promise>
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Promise::Resolve(const GlobalObject& aGlobal, JSContext* aCx,
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JS::Handle<JS::Value> aValue, ErrorResult& aRv)
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{
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MOZ_ASSERT(PrefEnabled());
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nsCOMPtr<nsPIDOMWindow> window = do_QueryInterface(aGlobal.Get());
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if (!window) {
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aRv.Throw(NS_ERROR_UNEXPECTED);
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return nullptr;
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}
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nsRefPtr<Promise> promise = new Promise(window);
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Optional<JS::Handle<JS::Value> > value(aCx, aValue);
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promise->mResolver->Resolve(aCx, value);
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return promise.forget();
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}
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/* static */ already_AddRefed<Promise>
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Promise::Reject(const GlobalObject& aGlobal, JSContext* aCx,
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JS::Handle<JS::Value> aValue, ErrorResult& aRv)
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{
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MOZ_ASSERT(PrefEnabled());
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nsCOMPtr<nsPIDOMWindow> window = do_QueryInterface(aGlobal.Get());
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if (!window) {
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aRv.Throw(NS_ERROR_UNEXPECTED);
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return nullptr;
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}
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nsRefPtr<Promise> promise = new Promise(window);
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Optional<JS::Handle<JS::Value> > value(aCx, aValue);
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promise->mResolver->Reject(aCx, value);
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return promise.forget();
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}
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already_AddRefed<Promise>
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Promise::Then(const Optional<OwningNonNull<AnyCallback> >& aResolveCallback,
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const Optional<OwningNonNull<AnyCallback> >& aRejectCallback)
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{
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nsRefPtr<Promise> promise = new Promise(GetParentObject());
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nsRefPtr<PromiseCallback> resolveCb =
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PromiseCallback::Factory(promise->mResolver,
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aResolveCallback.WasPassed()
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? &aResolveCallback.Value()
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: nullptr,
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PromiseCallback::Resolve);
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nsRefPtr<PromiseCallback> rejectCb =
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PromiseCallback::Factory(promise->mResolver,
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aRejectCallback.WasPassed()
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? &aRejectCallback.Value()
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: nullptr,
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PromiseCallback::Reject);
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AppendCallbacks(resolveCb, rejectCb);
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return promise.forget();
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}
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already_AddRefed<Promise>
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Promise::Catch(const Optional<OwningNonNull<AnyCallback> >& aRejectCallback)
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{
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Optional<OwningNonNull<AnyCallback> > resolveCb;
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return Then(resolveCb, aRejectCallback);
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}
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void
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Promise::AppendCallbacks(PromiseCallback* aResolveCallback,
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PromiseCallback* aRejectCallback)
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{
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if (aResolveCallback) {
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mResolveCallbacks.AppendElement(aResolveCallback);
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}
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if (aRejectCallback) {
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mRejectCallbacks.AppendElement(aRejectCallback);
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}
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// If promise's state is resolved, queue a task to process promise's resolve
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// callbacks with promise's result. If promise's state is rejected, queue a task
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// to process promise's reject callbacks with promise's result.
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if (mState != Pending && !mTaskPending) {
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nsRefPtr<PromiseTask> task = new PromiseTask(this);
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NS_DispatchToCurrentThread(task);
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mTaskPending = true;
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}
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}
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void
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Promise::RunTask()
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{
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MOZ_ASSERT(mState != Pending);
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nsTArray<nsRefPtr<PromiseCallback> > callbacks;
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callbacks.SwapElements(mState == Resolved ? mResolveCallbacks
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: mRejectCallbacks);
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mResolveCallbacks.Clear();
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mRejectCallbacks.Clear();
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Optional<JS::Handle<JS::Value> > value(nsContentUtils::GetSafeJSContext(),
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mResult);
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for (uint32_t i = 0; i < callbacks.Length(); ++i) {
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callbacks[i]->Call(value);
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}
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}
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} // namespace dom
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} // namespace mozilla
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