зеркало из https://github.com/mozilla/gecko-dev.git
49 строки
1.8 KiB
C++
49 строки
1.8 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=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
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef MozPromiseInlines_h_
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#define MozPromiseInlines_h_
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#include <type_traits>
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#include "mozilla/MozPromise.h"
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#include "mozilla/dom/PrimitiveConversions.h"
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#include "mozilla/dom/Promise.h"
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#include "mozilla/dom/PromiseNativeHandler.h"
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namespace mozilla {
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// Creates a C++ MozPromise from its JS counterpart, dom::Promise.
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// FromDomPromise currently only supports primitive types (int8/16/32, float,
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// double) And the reject value type must be a nsresult.
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template <typename ResolveValueT, typename RejectValueT, bool IsExclusive>
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RefPtr<MozPromise<ResolveValueT, RejectValueT, IsExclusive>>
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MozPromise<ResolveValueT, RejectValueT, IsExclusive>::FromDomPromise(
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dom::Promise* aDOMPromise) {
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static_assert(std::is_same_v<RejectValueType, nsresult>,
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"Reject type must be nsresult");
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RefPtr<Private> p = new Private(__func__);
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RefPtr<dom::DomPromiseListener> listener = new dom::DomPromiseListener(
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[p](JSContext* aCx, JS::Handle<JS::Value> aValue) {
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ResolveValueT value;
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bool ok = dom::ValueToPrimitive<ResolveValueT,
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dom::ConversionBehavior::eDefault>(
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aCx, aValue, "Resolution value", &value);
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if (!ok) {
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p->Reject(NS_ERROR_FAILURE, __func__);
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return;
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}
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p->Resolve(value, __func__);
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},
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[p](nsresult aError) { p->Reject(aError, __func__); });
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aDOMPromise->AppendNativeHandler(listener);
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return p;
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}
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} // namespace mozilla
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#endif
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