1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
3 /* This Source Code Form is subject to the terms of the Mozilla Public
4  * License, v. 2.0. If a copy of the MPL was not distributed with this file,
5  * You can obtain one at http://mozilla.org/MPL/2.0/. */
6 
7 #ifndef mozilla_dom_domrequest_h__
8 #define mozilla_dom_domrequest_h__
9 
10 #include "nsIDOMRequestService.h"
11 #include "mozilla/Attributes.h"
12 #include "mozilla/DOMEventTargetHelper.h"
13 #include "mozilla/dom/DOMException.h"
14 #include "mozilla/dom/DOMRequestBinding.h"
15 
16 #include "nsCOMPtr.h"
17 
18 namespace mozilla {
19 
20 class ErrorResult;
21 
22 namespace dom {
23 
24 class AnyCallback;
25 class Promise;
26 
27 class DOMRequest : public DOMEventTargetHelper {
28  protected:
29   JS::Heap<JS::Value> mResult;
30   RefPtr<DOMException> mError;
31   RefPtr<Promise> mPromise;
32   bool mDone;
33 
34  public:
35   NS_DECL_ISUPPORTS_INHERITED
36 
NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS_INHERITED(DOMRequest,DOMEventTargetHelper)37   NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS_INHERITED(DOMRequest,
38                                                          DOMEventTargetHelper)
39 
40   // WrapperCache
41   nsPIDOMWindowInner* GetParentObject() const { return GetOwner(); }
42 
43   virtual JSObject* WrapObject(JSContext* aCx,
44                                JS::Handle<JSObject*> aGivenProto) override;
45 
46   // WebIDL Interface
ReadyState()47   DOMRequestReadyState ReadyState() const {
48     return mDone ? DOMRequestReadyState::Done : DOMRequestReadyState::Pending;
49   }
50 
GetResult(JSContext *,JS::MutableHandle<JS::Value> aRetval)51   void GetResult(JSContext*, JS::MutableHandle<JS::Value> aRetval) const {
52     NS_ASSERTION(mDone || mResult.isUndefined(),
53                  "Result should be undefined when pending");
54     aRetval.set(mResult);
55   }
56 
GetError()57   DOMException* GetError() const {
58     NS_ASSERTION(mDone || !mError, "Error should be null when pending");
59     return mError;
60   }
61 
62   IMPL_EVENT_HANDLER(success)
63   IMPL_EVENT_HANDLER(error)
64 
65   void Then(JSContext* aCx, AnyCallback* aResolveCallback,
66             AnyCallback* aRejectCallback, JS::MutableHandle<JS::Value> aRetval,
67             mozilla::ErrorResult& aRv);
68 
69   void FireSuccess(JS::Handle<JS::Value> aResult);
70   void FireError(const nsAString& aError);
71   void FireError(nsresult aError);
72   void FireDetailedError(DOMException& aError);
73 
74   explicit DOMRequest(nsPIDOMWindowInner* aWindow);
75   explicit DOMRequest(nsIGlobalObject* aGlobal);
76 
77  protected:
78   virtual ~DOMRequest();
79 
80   void FireEvent(const nsAString& aType, bool aBubble, bool aCancelable);
81 
82   void RootResultVal();
83 };
84 
85 class DOMRequestService final : public nsIDOMRequestService {
86   ~DOMRequestService() = default;
87 
88  public:
89   NS_DECL_ISUPPORTS
90   NS_DECL_NSIDOMREQUESTSERVICE
91 
92   // No one should call this but the factory.
FactoryCreate()93   static already_AddRefed<DOMRequestService> FactoryCreate() {
94     return MakeAndAddRef<DOMRequestService>();
95   }
96 };
97 
98 }  // namespace dom
99 }  // namespace mozilla
100 
101 #define DOMREQUEST_SERVICE_CONTRACTID "@mozilla.org/dom/dom-request-service;1"
102 
103 #endif  // mozilla_dom_domrequest_h__
104