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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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_ipc_BlobChild_h
#define mozilla_dom_ipc_BlobChild_h
#include "mozilla/Attributes.h"
#include "mozilla/dom/PBlobChild.h"
#include "nsCOMPtr.h"
#include "nsID.h"
class nsIEventTarget;
class nsIRemoteBlob;
class nsString;
namespace mozilla {
namespace ipc {
class PBackgroundChild;
} // namespace ipc
namespace dom {
class Blob;
class BlobImpl;
class ContentChild;
class nsIContentChild;
class PBlobStreamChild;
class BlobChild final
: public PBlobChild
{
typedef mozilla::ipc::PBackgroundChild PBackgroundChild;
class RemoteBlobImpl;
friend class RemoteBlobImpl;
class RemoteBlobSliceImpl;
friend class RemoteBlobSliceImpl;
BlobImpl* mBlobImpl;
RemoteBlobImpl* mRemoteBlobImpl;
// One of these will be null and the other non-null.
PBackgroundChild* mBackgroundManager;
nsCOMPtr<nsIContentChild> mContentManager;
nsCOMPtr<nsIEventTarget> mEventTarget;
nsID mParentID;
bool mOwnsBlobImpl;
public:
class FriendKey;
static void
Startup(const FriendKey& aKey);
// These create functions are called on the sending side.
static BlobChild*
GetOrCreate(nsIContentChild* aManager, BlobImpl* aBlobImpl);
static BlobChild*
GetOrCreate(PBackgroundChild* aManager, BlobImpl* aBlobImpl);
// These create functions are called on the receiving side.
static BlobChild*
Create(nsIContentChild* aManager, const ChildBlobConstructorParams& aParams);
static BlobChild*
Create(PBackgroundChild* aManager,
const ChildBlobConstructorParams& aParams);
static void
Destroy(PBlobChild* aActor)
{
delete static_cast<BlobChild*>(aActor);
}
bool
HasManager() const
{
return mBackgroundManager || mContentManager;
}
PBackgroundChild*
GetBackgroundManager() const
{
return mBackgroundManager;
}
nsIContentChild*
GetContentManager() const
{
return mContentManager;
}
const nsID&
ParentID() const;
// Get the BlobImpl associated with this actor. This may always be called
// on the sending side. It may also be called on the receiving side unless
// this is a "mystery" blob that has not yet received a SetMysteryBlobInfo()
// call.
already_AddRefed<BlobImpl>
GetBlobImpl();
// Use this for files.
bool
SetMysteryBlobInfo(const nsString& aName,
const nsString& aContentType,
uint64_t aLength,
int64_t aLastModifiedDate);
// Use this for non-file blobs.
bool
SetMysteryBlobInfo(const nsString& aContentType, uint64_t aLength);
void
AssertIsOnOwningThread() const
#ifdef DEBUG
;
#else
{ }
#endif
private:
// These constructors are called on the sending side.
BlobChild(nsIContentChild* aManager, BlobImpl* aBlobImpl);
BlobChild(PBackgroundChild* aManager, BlobImpl* aBlobImpl);
BlobChild(nsIContentChild* aManager, BlobChild* aOther);
BlobChild(PBackgroundChild* aManager, BlobChild* aOther, BlobImpl* aBlobImpl);
// These constructors are called on the receiving side.
BlobChild(nsIContentChild* aManager,
const ChildBlobConstructorParams& aParams);
BlobChild(PBackgroundChild* aManager,
const ChildBlobConstructorParams& aParams);
// These constructors are called for slices.
BlobChild(nsIContentChild* aManager,
const nsID& aParentID,
RemoteBlobSliceImpl* aRemoteBlobSliceImpl);
BlobChild(PBackgroundChild* aManager,
const nsID& aParentID,
RemoteBlobSliceImpl* aRemoteBlobSliceImpl);
// Only called by Destroy().
~BlobChild();
void
CommonInit(BlobImpl* aBlobImpl);
void
CommonInit(BlobChild* aOther, BlobImpl* aBlobImpl);
void
CommonInit(const ChildBlobConstructorParams& aParams);
void
CommonInit(const nsID& aParentID, RemoteBlobImpl* aRemoteBlobImpl);
template <class ChildManagerType>
static BlobChild*
GetOrCreateFromImpl(ChildManagerType* aManager, BlobImpl* aBlobImpl);
template <class ChildManagerType>
static BlobChild*
CreateFromParams(ChildManagerType* aManager,
const ChildBlobConstructorParams& aParams);
template <class ChildManagerType>
static BlobChild*
SendSliceConstructor(ChildManagerType* aManager,
RemoteBlobSliceImpl* aRemoteBlobSliceImpl,
const ParentBlobConstructorParams& aParams);
static BlobChild*
MaybeGetActorFromRemoteBlob(nsIRemoteBlob* aRemoteBlob,
nsIContentChild* aManager,
BlobImpl* aBlobImpl);
static BlobChild*
MaybeGetActorFromRemoteBlob(nsIRemoteBlob* aRemoteBlob,
PBackgroundChild* aManager,
BlobImpl* aBlobImpl);
void
NoteDyingRemoteBlobImpl();
nsIEventTarget*
EventTarget() const
{
return mEventTarget;
}
bool
IsOnOwningThread() const;
// These methods are only called by the IPDL message machinery.
virtual void
ActorDestroy(ActorDestroyReason aWhy) override;
virtual PBlobStreamChild*
AllocPBlobStreamChild(const uint64_t& aStart,
const uint64_t& aLength) override;
virtual bool
DeallocPBlobStreamChild(PBlobStreamChild* aActor) override;
virtual bool
RecvCreatedFromKnownBlob() override;
};
// Only let ContentChild call BlobChild::Startup() and ensure that
// ContentChild can't access any other BlobChild internals.
class BlobChild::FriendKey final
{
friend class ContentChild;
private:
FriendKey()
{ }
FriendKey(const FriendKey& /* aOther */)
{ }
public:
~FriendKey()
{ }
};
} // namespace dom
} // namespace mozilla
#endif // mozilla_dom_ipc_BlobChild_h
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