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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_GetFilesHelper_h
#define mozilla_dom_GetFilesHelper_h
#include "mozilla/Mutex.h"
#include "mozilla/RefPtr.h"
#include "mozilla/dom/File.h"
#include "nsClassHashtable.h"
#include "nsCycleCollectionTraversalCallback.h"
#include "nsTArray.h"
#include "nsTHashtable.h"
#include "nsThreadUtils.h"
class nsIGlobalObject;
namespace mozilla {
namespace dom {
class BlobImpl;
class ContentParent;
class File;
class GetFilesHelperParent;
class OwningFileOrDirectory;
class Promise;
class GetFilesCallback
{
public:
NS_INLINE_DECL_REFCOUNTING(GetFilesCallback);
virtual void
Callback(nsresult aStatus, const Sequence<RefPtr<File>>& aFiles) = 0;
protected:
virtual ~GetFilesCallback() {}
};
class GetFilesHelperBase
{
protected:
explicit GetFilesHelperBase(bool aRecursiveFlag)
: mRecursiveFlag(aRecursiveFlag)
{}
virtual ~GetFilesHelperBase() {}
virtual bool
IsCanceled()
{
return false;
}
nsresult
ExploreDirectory(const nsAString& aDOMPath, nsIFile* aFile);
nsresult
AddExploredDirectory(nsIFile* aDirectory);
bool
ShouldFollowSymLink(nsIFile* aDirectory);
bool mRecursiveFlag;
// We populate this array in the I/O thread with the BlobImpl.
FallibleTArray<RefPtr<BlobImpl>> mTargetBlobImplArray;
nsTHashtable<nsCStringHashKey> mExploredDirectories;
};
// Retrieving the list of files can be very time/IO consuming. We use this
// helper class to do it just once.
class GetFilesHelper : public Runnable
, public GetFilesHelperBase
{
friend class GetFilesHelperParent;
public:
static already_AddRefed<GetFilesHelper>
Create(nsIGlobalObject* aGlobal,
const nsTArray<OwningFileOrDirectory>& aFilesOrDirectory,
bool aRecursiveFlag, ErrorResult& aRv);
void
AddPromise(Promise* aPromise);
void
AddCallback(GetFilesCallback* aCallback);
// CC methods
void Unlink();
void Traverse(nsCycleCollectionTraversalCallback &cb);
protected:
GetFilesHelper(nsIGlobalObject* aGlobal, bool aRecursiveFlag);
virtual ~GetFilesHelper();
void
SetDirectoryPath(const nsAString& aDirectoryPath)
{
mDirectoryPath = aDirectoryPath;
}
virtual bool
IsCanceled() override
{
MutexAutoLock lock(mMutex);
return mCanceled;
}
virtual void
Work(ErrorResult& aRv);
virtual void
Cancel() {};
NS_IMETHOD
Run() override;
void
RunIO();
void
RunMainThread();
void
OperationCompleted();
void
ResolveOrRejectPromise(Promise* aPromise);
void
RunCallback(GetFilesCallback* aCallback);
nsCOMPtr<nsIGlobalObject> mGlobal;
bool mListingCompleted;
nsString mDirectoryPath;
// This is the real File sequence that we expose via Promises.
Sequence<RefPtr<File>> mFiles;
// Error code to propagate.
nsresult mErrorResult;
nsTArray<RefPtr<Promise>> mPromises;
nsTArray<RefPtr<GetFilesCallback>> mCallbacks;
Mutex mMutex;
// This variable is protected by mutex.
bool mCanceled;
};
class GetFilesHelperChild final : public GetFilesHelper
{
public:
GetFilesHelperChild(nsIGlobalObject* aGlobal, bool aRecursiveFlag)
: GetFilesHelper(aGlobal, aRecursiveFlag)
, mPendingOperation(false)
{}
virtual void
Work(ErrorResult& aRv) override;
virtual void
Cancel() override;
bool
AppendBlobImpl(BlobImpl* aBlobImpl);
void
Finished(nsresult aResult);
private:
nsID mUUID;
bool mPendingOperation;
};
class GetFilesHelperParentCallback;
class GetFilesHelperParent final : public GetFilesHelper
{
friend class GetFilesHelperParentCallback;
public:
static already_AddRefed<GetFilesHelperParent>
Create(const nsID& aUUID, const nsAString& aDirectoryPath,
bool aRecursiveFlag, ContentParent* aContentParent, ErrorResult& aRv);
private:
GetFilesHelperParent(const nsID& aUUID, ContentParent* aContentParent,
bool aRecursiveFlag);
~GetFilesHelperParent();
RefPtr<ContentParent> mContentParent;
nsID mUUID;
};
} // dom namespace
} // mozilla namespace
#endif // mozilla_dom_GetFilesHelper_h
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