зеркало из https://github.com/mozilla/gecko-dev.git
129 строки
3.4 KiB
C++
129 строки
3.4 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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#include "BroadcastChannelChild.h"
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#include "BroadcastChannel.h"
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#include "jsapi.h"
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#include "mozilla/dom/File.h"
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#include "mozilla/dom/MessageEvent.h"
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#include "mozilla/dom/MessageEventBinding.h"
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#include "mozilla/dom/WorkerPrivate.h"
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#include "mozilla/dom/WorkerScope.h"
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#include "mozilla/dom/ScriptSettings.h"
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#include "mozilla/ipc/PBackgroundChild.h"
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#include "mozilla/dom/ipc/StructuredCloneData.h"
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namespace mozilla {
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using namespace ipc;
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namespace dom {
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BroadcastChannelChild::BroadcastChannelChild(const nsACString& aOrigin)
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: mBC(nullptr)
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, mActorDestroyed(false)
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{
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CopyUTF8toUTF16(aOrigin, mOrigin);
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}
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BroadcastChannelChild::~BroadcastChannelChild()
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{
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MOZ_ASSERT(!mBC);
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}
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mozilla::ipc::IPCResult
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BroadcastChannelChild::RecvNotify(const ClonedMessageData& aData)
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{
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// Make sure to retrieve all blobs from the message before returning to avoid
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// leaking their actors.
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ipc::StructuredCloneDataNoTransfers cloneData;
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cloneData.BorrowFromClonedMessageDataForBackgroundChild(aData);
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nsCOMPtr<DOMEventTargetHelper> helper = mBC;
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nsCOMPtr<EventTarget> eventTarget = do_QueryInterface(helper);
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// The object is going to be deleted soon. No notify is required.
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if (!eventTarget) {
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return IPC_OK();
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}
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// CheckInnerWindowCorrectness can be used also without a window when
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// BroadcastChannel is running in a worker. In this case, it's a NOP.
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if (NS_FAILED(mBC->CheckInnerWindowCorrectness())) {
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return IPC_OK();
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}
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mBC->RemoveDocFromBFCache();
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AutoJSAPI jsapi;
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nsCOMPtr<nsIGlobalObject> globalObject;
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if (NS_IsMainThread()) {
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globalObject = do_QueryInterface(mBC->GetParentObject());
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} else {
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WorkerPrivate* workerPrivate = GetCurrentThreadWorkerPrivate();
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MOZ_ASSERT(workerPrivate);
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globalObject = workerPrivate->GlobalScope();
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}
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if (!globalObject || !jsapi.Init(globalObject)) {
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NS_WARNING("Failed to initialize AutoJSAPI object.");
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return IPC_OK();
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}
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JSContext* cx = jsapi.cx();
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JS::Rooted<JS::Value> value(cx, JS::NullValue());
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if (cloneData.DataLength()) {
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IgnoredErrorResult rv;
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cloneData.Read(cx, &value, rv);
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if (NS_WARN_IF(rv.Failed())) {
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DispatchError(cx);
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return IPC_OK();
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}
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}
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RootedDictionary<MessageEventInit> init(cx);
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init.mBubbles = false;
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init.mCancelable = false;
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init.mOrigin = mOrigin;
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init.mData = value;
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RefPtr<MessageEvent> event =
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MessageEvent::Constructor(mBC, NS_LITERAL_STRING("message"), init);
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event->SetTrusted(true);
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bool status;
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mBC->DispatchEvent(static_cast<Event*>(event.get()), &status);
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return IPC_OK();
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}
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void
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BroadcastChannelChild::ActorDestroy(ActorDestroyReason aWhy)
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{
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mActorDestroyed = true;
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}
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void
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BroadcastChannelChild::DispatchError(JSContext* aCx)
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{
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RootedDictionary<MessageEventInit> init(aCx);
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init.mBubbles = false;
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init.mCancelable = false;
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init.mOrigin = mOrigin;
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RefPtr<Event> event =
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MessageEvent::Constructor(mBC, NS_LITERAL_STRING("messageerror"), init);
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event->SetTrusted(true);
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bool dummy;
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mBC->DispatchEvent(event, &dummy);
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}
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} // namespace dom
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} // namespace mozilla
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