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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/. */
#ifndef _mozilla_dom_ClientManagerService_h
#define _mozilla_dom_ClientManagerService_h
#include "ClientHandleParent.h"
#include "ClientOpPromise.h"
#include "mozilla/AlreadyAddRefed.h"
#include "mozilla/Assertions.h"
#include "mozilla/Maybe.h"
#include "mozilla/MozPromise.h"
#include "mozilla/RefPtr.h"
#include "mozilla/Variant.h"
#include "mozilla/dom/ClientIPCTypes.h"
#include "mozilla/dom/ipc/IdType.h"
#include "nsTHashMap.h"
#include "nsHashKeys.h"
#include "nsISupports.h"
#include "nsTArray.h"
struct nsID;
namespace mozilla {
namespace ipc {
class PrincipalInfo;
} // namespace ipc
namespace dom {
class ClientManagerParent;
class ClientSourceParent;
class ClientHandleParent;
class ThreadsafeContentParentHandle;
// Define a singleton service to manage client activity throughout the
// browser. This service runs on the PBackground thread. To interact
// it with it please use the ClientManager and ClientHandle classes.
class ClientManagerService final {
// Placeholder type that represents a ClientSourceParent that may be created
// in the future (e.g. while a redirect chain is being resolved).
//
// Each FutureClientSourceParent has a promise that callbacks may be chained
// to; the promise will be resolved when the associated ClientSourceParent is
// created or rejected when it's known that it'll never be created.
class FutureClientSourceParent {
public:
explicit FutureClientSourceParent(const IPCClientInfo& aClientInfo);
const mozilla::ipc::PrincipalInfo& PrincipalInfo() const {
return mPrincipalInfo;
}
already_AddRefed<SourcePromise> Promise() {
return mPromiseHolder.Ensure(__func__);
}
void ResolvePromiseIfExists() {
mPromiseHolder.ResolveIfExists(true, __func__);
}
void RejectPromiseIfExists(const CopyableErrorResult& aRv) {
MOZ_ASSERT(aRv.Failed());
mPromiseHolder.RejectIfExists(aRv, __func__);
}
void SetAsAssociated() { mAssociated = true; }
bool IsAssociated() const { return mAssociated; }
private:
const mozilla::ipc::PrincipalInfo mPrincipalInfo;
MozPromiseHolder<SourcePromise> mPromiseHolder;
RefPtr<ClientManagerService> mService = ClientManagerService::GetInstance();
bool mAssociated;
};
using SourceTableEntry =
Variant<FutureClientSourceParent, ClientSourceParent*>;
// Store the possible ClientSourceParent objects in a hash table. We want to
// optimize for insertion, removal, and lookup by UUID.
nsTHashMap<nsIDHashKey, SourceTableEntry> mSourceTable;
nsTArray<ClientManagerParent*> mManagerList;
bool mShutdown;
ClientManagerService();
~ClientManagerService();
void Shutdown();
// Returns nullptr if aEntry isn't a ClientSourceParent (i.e. it's a
// FutureClientSourceParent).
ClientSourceParent* MaybeUnwrapAsExistingSource(
const SourceTableEntry& aEntry) const;
public:
static already_AddRefed<ClientManagerService> GetOrCreateInstance();
// Returns nullptr if the service is not already created.
static already_AddRefed<ClientManagerService> GetInstance();
bool AddSource(ClientSourceParent* aSource);
bool RemoveSource(ClientSourceParent* aSource);
// Returns true when a FutureClientSourceParent is successfully added.
bool ExpectFutureSource(const IPCClientInfo& aClientInfo);
// May still be called if it's possible that the FutureClientSourceParent
// no longer exists.
void ForgetFutureSource(const IPCClientInfo& aClientInfo);
// Returns a promise that resolves if/when the ClientSourceParent exists and
// rejects if/when it's known that the ClientSourceParent will never exist or
// if it's frozen. Note that the ClientSourceParent may not exist anymore
// by the time promise callbacks run.
RefPtr<SourcePromise> FindSource(
const nsID& aID, const mozilla::ipc::PrincipalInfo& aPrincipalInfo);
// Returns nullptr if the ClientSourceParent doesn't exist yet (i.e. it's a
// FutureClientSourceParent or has already been destroyed) or is frozen.
ClientSourceParent* FindExistingSource(
const nsID& aID, const mozilla::ipc::PrincipalInfo& aPrincipalInfo) const;
void AddManager(ClientManagerParent* aManager);
void RemoveManager(ClientManagerParent* aManager);
RefPtr<ClientOpPromise> Navigate(
ThreadsafeContentParentHandle* aOriginContent,
const ClientNavigateArgs& aArgs);
RefPtr<ClientOpPromise> MatchAll(
ThreadsafeContentParentHandle* aOriginContent,
const ClientMatchAllArgs& aArgs);
RefPtr<ClientOpPromise> Claim(ThreadsafeContentParentHandle* aOriginContent,
const ClientClaimArgs& aArgs);
RefPtr<ClientOpPromise> GetInfoAndState(
ThreadsafeContentParentHandle* aOriginContent,
const ClientGetInfoAndStateArgs& aArgs);
RefPtr<ClientOpPromise> OpenWindow(
ThreadsafeContentParentHandle* aOriginContent,
const ClientOpenWindowArgs& aArgs);
bool HasWindow(const Maybe<ContentParentId>& aContentParentId,
const mozilla::ipc::PrincipalInfo& aPrincipalInfo,
const nsID& aClientId);
NS_INLINE_DECL_REFCOUNTING(mozilla::dom::ClientManagerService)
};
} // namespace dom
} // namespace mozilla
#endif // _mozilla_dom_ClientManagerService_h
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