1/*
2 * Copyright (C) 2017 Yusuke Suzuki <utatane.tea@gmail.com>.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
23 * THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#pragma once
27
28#include "IDLTypes.h"
29#include "JSDOMConvertBase.h"
30#include "JSDOMPromise.h"
31
32namespace WebCore {
33
34template<typename T> struct Converter<IDLPromise<T>> : DefaultConverter<IDLPromise<T>> {
35 using ReturnType = RefPtr<DOMPromise>;
36
37 // https://heycam.github.io/webidl/#es-promise
38 template<typename ExceptionThrower = DefaultExceptionThrower>
39 static ReturnType convert(JSC::ExecState& state, JSC::JSValue value, ExceptionThrower&& exceptionThrower = ExceptionThrower())
40 {
41 JSC::VM& vm = state.vm();
42 auto scope = DECLARE_THROW_SCOPE(vm);
43 auto* globalObject = JSC::jsDynamicCast<JSDOMGlobalObject*>(vm, state.lexicalGlobalObject());
44 if (!globalObject)
45 return nullptr;
46
47 // 1. Let resolve be the original value of %Promise%.resolve.
48 // 2. Let promise be the result of calling resolve with %Promise% as the this value and V as the single argument value.
49 auto* promise = JSC::JSPromise::resolve(*globalObject, value);
50 if (scope.exception()) {
51 exceptionThrower(state, scope);
52 return nullptr;
53 }
54 ASSERT(promise);
55
56 // 3. Return the IDL promise type value that is a reference to the same object as promise.
57 return DOMPromise::create(*globalObject, *promise);
58 }
59};
60
61template<typename T> struct JSConverter<IDLPromise<T>> {
62 static constexpr bool needsState = true;
63 static constexpr bool needsGlobalObject = true;
64
65 static JSC::JSValue convert(JSC::ExecState&, JSDOMGlobalObject&, DOMPromise& promise)
66 {
67 return promise.promise();
68 }
69
70 template<template<typename> class U>
71 static JSC::JSValue convert(JSC::ExecState& state, JSDOMGlobalObject& globalObject, U<T>& promiseProxy)
72 {
73 return promiseProxy.promise(state, globalObject);
74 }
75};
76
77} // namespace WebCore
78