зеркало из https://github.com/mozilla/gecko-dev.git
133 строки
3.3 KiB
C++
133 строки
3.3 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 "BroadcastChannelService.h"
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#include "BroadcastChannelParent.h"
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#include "mozilla/dom/File.h"
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#include "mozilla/dom/ipc/BlobParent.h"
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#include "mozilla/ipc/BackgroundParent.h"
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#ifdef XP_WIN
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#undef PostMessage
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#endif
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namespace mozilla {
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using namespace ipc;
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namespace dom {
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namespace {
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BroadcastChannelService* sInstance = nullptr;
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} // namespace
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BroadcastChannelService::BroadcastChannelService()
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{
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AssertIsOnBackgroundThread();
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// sInstance is a raw BroadcastChannelService*.
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MOZ_ASSERT(!sInstance);
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sInstance = this;
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}
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BroadcastChannelService::~BroadcastChannelService()
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{
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AssertIsOnBackgroundThread();
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MOZ_ASSERT(sInstance == this);
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MOZ_ASSERT(mAgents.Count() == 0);
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sInstance = nullptr;
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}
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// static
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already_AddRefed<BroadcastChannelService>
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BroadcastChannelService::GetOrCreate()
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{
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AssertIsOnBackgroundThread();
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RefPtr<BroadcastChannelService> instance = sInstance;
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if (!instance) {
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instance = new BroadcastChannelService();
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}
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return instance.forget();
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}
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void
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BroadcastChannelService::RegisterActor(BroadcastChannelParent* aParent,
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const nsAString& aOriginChannelKey)
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{
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AssertIsOnBackgroundThread();
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MOZ_ASSERT(aParent);
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nsTArray<BroadcastChannelParent*>* parents;
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if (!mAgents.Get(aOriginChannelKey, &parents)) {
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parents = new nsTArray<BroadcastChannelParent*>();
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mAgents.Put(aOriginChannelKey, parents);
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}
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MOZ_ASSERT(!parents->Contains(aParent));
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parents->AppendElement(aParent);
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}
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void
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BroadcastChannelService::UnregisterActor(BroadcastChannelParent* aParent,
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const nsAString& aOriginChannelKey)
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{
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AssertIsOnBackgroundThread();
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MOZ_ASSERT(aParent);
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nsTArray<BroadcastChannelParent*>* parents;
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if (!mAgents.Get(aOriginChannelKey, &parents)) {
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MOZ_CRASH("Invalid state");
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}
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parents->RemoveElement(aParent);
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if (parents->IsEmpty()) {
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mAgents.Remove(aOriginChannelKey);
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}
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}
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void
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BroadcastChannelService::PostMessage(BroadcastChannelParent* aParent,
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const ClonedMessageData& aData,
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const nsAString& aOriginChannelKey)
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{
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AssertIsOnBackgroundThread();
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MOZ_ASSERT(aParent);
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nsTArray<BroadcastChannelParent*>* parents;
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if (!mAgents.Get(aOriginChannelKey, &parents)) {
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MOZ_CRASH("Invalid state");
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}
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// We need to keep the array alive for the life-time of this operation.
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nsTArray<RefPtr<BlobImpl>> blobs;
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if (!aData.blobsParent().IsEmpty()) {
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blobs.SetCapacity(aData.blobsParent().Length());
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for (uint32_t i = 0, len = aData.blobsParent().Length(); i < len; ++i) {
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RefPtr<BlobImpl> impl =
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static_cast<BlobParent*>(aData.blobsParent()[i])->GetBlobImpl();
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MOZ_ASSERT(impl);
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blobs.AppendElement(impl);
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}
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}
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for (uint32_t i = 0; i < parents->Length(); ++i) {
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BroadcastChannelParent* parent = parents->ElementAt(i);
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MOZ_ASSERT(parent);
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if (parent != aParent) {
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parent->Deliver(aData);
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}
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}
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}
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} // namespace dom
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} // namespace mozilla
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