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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 "mozilla/dom/JSProcessActorProtocol.h"
namespace mozilla {
namespace dom {
NS_IMPL_CYCLE_COLLECTING_ADDREF(JSProcessActorProtocol)
NS_IMPL_CYCLE_COLLECTING_RELEASE(JSProcessActorProtocol)
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(JSProcessActorProtocol)
NS_INTERFACE_MAP_ENTRY(nsIObserver)
NS_INTERFACE_MAP_END
NS_IMPL_CYCLE_COLLECTION(JSProcessActorProtocol)
/* static */ already_AddRefed<JSProcessActorProtocol>
JSProcessActorProtocol::FromIPC(const JSProcessActorInfo& aInfo) {
MOZ_DIAGNOSTIC_ASSERT(XRE_IsContentProcess());
RefPtr<JSProcessActorProtocol> proto =
new JSProcessActorProtocol(aInfo.name());
proto->mRemoteTypes = aInfo.remoteTypes().Clone();
proto->mChild.mModuleURI = aInfo.url();
proto->mChild.mObservers = aInfo.observers().Clone();
return proto.forget();
}
JSProcessActorInfo JSProcessActorProtocol::ToIPC() {
MOZ_DIAGNOSTIC_ASSERT(XRE_IsParentProcess());
JSProcessActorInfo info;
info.name() = mName;
info.remoteTypes() = mRemoteTypes.Clone();
info.url() = mChild.mModuleURI;
info.observers() = mChild.mObservers.Clone();
return info;
}
already_AddRefed<JSProcessActorProtocol>
JSProcessActorProtocol::FromWebIDLOptions(const nsACString& aName,
const ProcessActorOptions& aOptions,
ErrorResult& aRv) {
MOZ_DIAGNOSTIC_ASSERT(XRE_IsParentProcess());
RefPtr<JSProcessActorProtocol> proto = new JSProcessActorProtocol(aName);
if (aOptions.mParent.WasPassed()) {
proto->mParent.mModuleURI.emplace(aOptions.mParent.Value().mModuleURI);
}
if (aOptions.mChild.WasPassed()) {
proto->mChild.mModuleURI.emplace(aOptions.mChild.Value().mModuleURI);
}
if (!aOptions.mChild.WasPassed() && !aOptions.mParent.WasPassed()) {
aRv.ThrowNotSupportedError(
"No point registering an actor with neither child nor parent "
"specifications.");
return nullptr;
}
if (aOptions.mChild.WasPassed() &&
aOptions.mChild.Value().mObservers.WasPassed()) {
proto->mChild.mObservers = aOptions.mChild.Value().mObservers.Value();
}
return proto.forget();
}
NS_IMETHODIMP JSProcessActorProtocol::Observe(nsISupports* aSubject,
const char* aTopic,
const char16_t* aData) {
MOZ_ASSERT(nsContentUtils::IsSafeToRunScript());
ErrorResult error;
RefPtr<JSProcessActorChild> actor =
ContentChild::GetSingleton()->GetActor(mName, error);
// Don't raise an error if creation of our actor was vetoed.
if (NS_WARN_IF(error.Failed())) {
nsresult rv = error.StealNSResult();
if (rv == NS_ERROR_NOT_AVAILABLE) {
return NS_OK;
}
return rv;
}
// Build a observer callback.
JS::Rooted<JSObject*> global(RootingCx(),
JS::GetNonCCWObjectGlobal(actor->GetWrapper()));
RefPtr<MozObserverCallback> observerCallback =
new MozObserverCallback(actor->GetWrapper(), global, nullptr, nullptr);
observerCallback->Observe(aSubject, nsDependentCString(aTopic),
aData ? nsDependentString(aData) : VoidString());
return NS_OK;
}
void JSProcessActorProtocol::AddObservers() {
nsCOMPtr<nsIObserverService> os = services::GetObserverService();
for (auto& topic : mChild.mObservers) {
// This makes the observer service hold an owning reference to the
// JSProcessActorProtocol. The JSWindowActorProtocol objects will be living
// for the full lifetime of the content process, thus the extra strong
// referencec doesn't have a negative impact.
os->AddObserver(this, topic.get(), false);
}
}
void JSProcessActorProtocol::RemoveObservers() {
nsCOMPtr<nsIObserverService> os = services::GetObserverService();
for (auto& topic : mChild.mObservers) {
os->RemoveObserver(this, topic.get());
}
}
bool JSProcessActorProtocol::RemoteTypePrefixMatches(
const nsDependentSubstring& aRemoteType) {
for (auto& remoteType : mRemoteTypes) {
if (StringBeginsWith(aRemoteType, remoteType)) {
return true;
}
}
return false;
}
bool JSProcessActorProtocol::Matches(const nsAString& aRemoteType) {
if (!mRemoteTypes.IsEmpty() &&
!RemoteTypePrefixMatches(RemoteTypePrefix(aRemoteType))) {
return false;
}
return true;
}
} // namespace dom
} // namespace mozilla
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