The Tor Browser: dom/base/MessageChannel.cpp@6474c204b198

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

     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/. */

     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"

    13 namespace mozilla {

    14 namespace dom {

    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)

    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

    25 namespace {

    26   bool gPrefInitialized = false;

    27   bool gPrefEnabled = false;

    29 }

    32 /* static */ bool

    33 MessageChannel::PrefEnabled()

    34 {

    35   if (!gPrefInitialized) {

    36     Preferences::AddBoolVarCache(&gPrefEnabled, "dom.messageChannel.enabled");

    37     gPrefInitialized = true;

    38   }

    40   return gPrefEnabled;

    41 }

    43 MessageChannel::MessageChannel(nsPIDOMWindow* aWindow)

    44   : mWindow(aWindow)

    45 {

    46   MOZ_COUNT_CTOR(MessageChannel);

    47   SetIsDOMBinding();

    49   mPort1 = new MessagePort(mWindow);

    50   mPort2 = new MessagePort(mWindow);

    52   mPort1->Entangle(mPort2);

    53   mPort2->Entangle(mPort1);

    54 }

    56 MessageChannel::~MessageChannel()

    57 {

    58   MOZ_COUNT_DTOR(MessageChannel);

    59 }

    61 JSObject*

    62 MessageChannel::WrapObject(JSContext* aCx)

    63 {

    64   return MessageChannelBinding::Wrap(aCx, this);

    65 }

    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   }

    76   nsRefPtr<MessageChannel> channel = new MessageChannel(window);

    77   return channel.forget();

    78 }

    80 } // namespace dom

    81 } // namespace mozilla

The Tor Browser / file revision