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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"
#include "mozilla/dom/InProcessChild.h"
#include "mozilla/dom/JSProcessActorBinding.h"
#include "mozilla/dom/ContentChild.h"
#include "mozilla/dom/ContentParent.h"
#include "mozilla/dom/JSActorBinding.h"
#include "mozilla/dom/PContent.h"
#include "nsContentUtils.h"
#include "JSActorProtocolUtils.h"
namespace mozilla::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());
JSActorProtocolUtils::FromIPCShared(proto, aInfo);
// Content processes aren't the parent process, so this flag is irrelevant and
// not propagated.
proto->mIncludeParent = false;
return proto.forget();
}
JSProcessActorInfo JSProcessActorProtocol::ToIPC() {
MOZ_DIAGNOSTIC_ASSERT(XRE_IsParentProcess());
JSProcessActorInfo info;
JSActorProtocolUtils::ToIPCShared(info, this);
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 (!JSActorProtocolUtils::FromWebIDLOptionsShared(proto, aOptions, aRv)) {
return nullptr;
}
proto->mIncludeParent = aOptions.mIncludeParent;
return proto.forget();
}
NS_IMETHODIMP JSProcessActorProtocol::Observe(nsISupports* aSubject,
const char* aTopic,
const char16_t* aData) {
MOZ_ASSERT(nsContentUtils::IsSafeToRunScript());
RefPtr<JSActorManager> manager;
if (XRE_IsParentProcess()) {
manager = InProcessChild::Singleton();
} else {
manager = ContentChild::GetSingleton();
}
// Ensure our actor is present.
AutoJSAPI jsapi;
jsapi.Init();
RefPtr<JSActor> actor = manager->GetActor(jsapi.cx(), mName, IgnoreErrors());
if (!actor || NS_WARN_IF(!actor->GetWrapperPreserveColor())) {
return NS_OK;
}
// Build a observer callback.
JS::Rooted<JSObject*> global(jsapi.cx(),
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 nsDependentCSubstring& aRemoteType) {
for (auto& remoteType : mRemoteTypes) {
if (StringBeginsWith(aRemoteType, remoteType)) {
return true;
}
}
return false;
}
bool JSProcessActorProtocol::Matches(const nsACString& aRemoteType,
ErrorResult& aRv) {
if (!mIncludeParent && aRemoteType.IsEmpty()) {
aRv.ThrowNotSupportedError(nsPrintfCString(
"Process protocol '%s' doesn't match the parent process", mName.get()));
return false;
}
if (!mRemoteTypes.IsEmpty() &&
!RemoteTypePrefixMatches(RemoteTypePrefix(aRemoteType))) {
aRv.ThrowNotSupportedError(nsPrintfCString(
"Process protocol '%s' doesn't support remote type '%s'", mName.get(),
PromiseFlatCString(aRemoteType).get()));
return false;
}
return true;
}
} // namespace mozilla::dom
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