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