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comparison: dom/base/MessageChannel.cpp
dom/base/MessageChannel.cpp
- changeset 0
- 6474c204b198
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| 1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ | |
| 2 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 3 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 5 | |
| 6 #include "MessageChannel.h" | |
| 7 #include "mozilla/Preferences.h" | |
| 8 #include "mozilla/dom/MessageChannelBinding.h" | |
| 9 #include "mozilla/dom/MessagePort.h" | |
| 10 #include "nsContentUtils.h" | |
| 11 #include "nsPIDOMWindow.h" | |
| 12 | |
| 13 namespace mozilla { | |
| 14 namespace dom { | |
| 15 | |
| 16 NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE_3(MessageChannel, mWindow, mPort1, mPort2) | |
| 17 NS_IMPL_CYCLE_COLLECTING_ADDREF(MessageChannel) | |
| 18 NS_IMPL_CYCLE_COLLECTING_RELEASE(MessageChannel) | |
| 19 | |
| 20 NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(MessageChannel) | |
| 21 NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY | |
| 22 NS_INTERFACE_MAP_ENTRY(nsISupports) | |
| 23 NS_INTERFACE_MAP_END | |
| 24 | |
| 25 namespace { | |
| 26 bool gPrefInitialized = false; | |
| 27 bool gPrefEnabled = false; | |
| 28 | |
| 29 } | |
| 30 | |
| 31 | |
| 32 /* static */ bool | |
| 33 MessageChannel::PrefEnabled() | |
| 34 { | |
| 35 if (!gPrefInitialized) { | |
| 36 Preferences::AddBoolVarCache(&gPrefEnabled, "dom.messageChannel.enabled"); | |
| 37 gPrefInitialized = true; | |
| 38 } | |
| 39 | |
| 40 return gPrefEnabled; | |
| 41 } | |
| 42 | |
| 43 MessageChannel::MessageChannel(nsPIDOMWindow* aWindow) | |
| 44 : mWindow(aWindow) | |
| 45 { | |
| 46 MOZ_COUNT_CTOR(MessageChannel); | |
| 47 SetIsDOMBinding(); | |
| 48 | |
| 49 mPort1 = new MessagePort(mWindow); | |
| 50 mPort2 = new MessagePort(mWindow); | |
| 51 | |
| 52 mPort1->Entangle(mPort2); | |
| 53 mPort2->Entangle(mPort1); | |
| 54 } | |
| 55 | |
| 56 MessageChannel::~MessageChannel() | |
| 57 { | |
| 58 MOZ_COUNT_DTOR(MessageChannel); | |
| 59 } | |
| 60 | |
| 61 JSObject* | |
| 62 MessageChannel::WrapObject(JSContext* aCx) | |
| 63 { | |
| 64 return MessageChannelBinding::Wrap(aCx, this); | |
| 65 } | |
| 66 | |
| 67 /* static */ already_AddRefed<MessageChannel> | |
| 68 MessageChannel::Constructor(const GlobalObject& aGlobal, ErrorResult& aRv) | |
| 69 { | |
| 70 nsCOMPtr<nsPIDOMWindow> window = do_QueryInterface(aGlobal.GetAsSupports()); | |
| 71 if (!window) { | |
| 72 aRv.Throw(NS_ERROR_UNEXPECTED); | |
| 73 return nullptr; | |
| 74 } | |
| 75 | |
| 76 nsRefPtr<MessageChannel> channel = new MessageChannel(window); | |
| 77 return channel.forget(); | |
| 78 } | |
| 79 | |
| 80 } // namespace dom | |
| 81 } // namespace mozilla |
