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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "BroadcastChannelService.h"
#include "BroadcastChannelParent.h"
#include "mozilla/dom/File.h"
#include "mozilla/dom/ipc/BlobParent.h"
#include "mozilla/ipc/BackgroundParent.h"
#ifdef XP_WIN
#undef PostMessage
#endif
namespace mozilla {
using namespace ipc;
namespace dom {
namespace {
BroadcastChannelService* sInstance = nullptr;
} // namespace
BroadcastChannelService::BroadcastChannelService()
{
AssertIsOnBackgroundThread();
// sInstance is a raw BroadcastChannelService*.
MOZ_ASSERT(!sInstance);
sInstance = this;
}
BroadcastChannelService::~BroadcastChannelService()
{
AssertIsOnBackgroundThread();
MOZ_ASSERT(sInstance == this);
MOZ_ASSERT(mAgents.Count() == 0);
sInstance = nullptr;
}
// static
already_AddRefed<BroadcastChannelService>
BroadcastChannelService::GetOrCreate()
{
AssertIsOnBackgroundThread();
RefPtr<BroadcastChannelService> instance = sInstance;
if (!instance) {
instance = new BroadcastChannelService();
}
return instance.forget();
}
void
BroadcastChannelService::RegisterActor(BroadcastChannelParent* aParent,
const nsAString& aOriginChannelKey)
{
AssertIsOnBackgroundThread();
MOZ_ASSERT(aParent);
nsTArray<BroadcastChannelParent*>* parents;
if (!mAgents.Get(aOriginChannelKey, &parents)) {
parents = new nsTArray<BroadcastChannelParent*>();
mAgents.Put(aOriginChannelKey, parents);
}
MOZ_ASSERT(!parents->Contains(aParent));
parents->AppendElement(aParent);
}
void
BroadcastChannelService::UnregisterActor(BroadcastChannelParent* aParent,
const nsAString& aOriginChannelKey)
{
AssertIsOnBackgroundThread();
MOZ_ASSERT(aParent);
nsTArray<BroadcastChannelParent*>* parents;
if (!mAgents.Get(aOriginChannelKey, &parents)) {
MOZ_CRASH("Invalid state");
}
parents->RemoveElement(aParent);
if (parents->IsEmpty()) {
mAgents.Remove(aOriginChannelKey);
}
}
void
BroadcastChannelService::PostMessage(BroadcastChannelParent* aParent,
const ClonedMessageData& aData,
const nsAString& aOriginChannelKey)
{
AssertIsOnBackgroundThread();
MOZ_ASSERT(aParent);
nsTArray<BroadcastChannelParent*>* parents;
if (!mAgents.Get(aOriginChannelKey, &parents)) {
MOZ_CRASH("Invalid state");
}
// We need to keep the array alive for the life-time of this operation.
nsTArray<RefPtr<BlobImpl>> blobs;
if (!aData.blobsParent().IsEmpty()) {
blobs.SetCapacity(aData.blobsParent().Length());
for (uint32_t i = 0, len = aData.blobsParent().Length(); i < len; ++i) {
RefPtr<BlobImpl> impl =
static_cast<BlobParent*>(aData.blobsParent()[i])->GetBlobImpl();
MOZ_ASSERT(impl);
blobs.AppendElement(impl);
}
}
for (uint32_t i = 0; i < parents->Length(); ++i) {
BroadcastChannelParent* parent = parents->ElementAt(i);
MOZ_ASSERT(parent);
if (parent != aParent) {
parent->Deliver(aData);
}
}
}
} // namespace dom
} // namespace mozilla
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