mirror of
https://github.com/mozilla/gecko-dev.git
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147 lines
2.9 KiB
C++
147 lines
2.9 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=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 file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef mozilla_dom_file_lockedfile_h__
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#define mozilla_dom_file_lockedfile_h__
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#include "mozilla/Attributes.h"
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#include "FileCommon.h"
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#include "mozilla/dom/FileModeBinding.h"
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#include "nsIDOMLockedFile.h"
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#include "nsIRunnable.h"
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#include "nsDOMEventTargetHelper.h"
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class nsIInputStream;
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BEGIN_FILE_NAMESPACE
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class FileHandle;
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class FileRequest;
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class MetadataHelper;
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class LockedFile : public nsDOMEventTargetHelper,
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public nsIDOMLockedFile,
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public nsIRunnable
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{
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friend class FinishHelper;
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friend class FileService;
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friend class FileHelper;
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friend class MetadataHelper;
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public:
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NS_DECL_ISUPPORTS_INHERITED
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NS_DECL_NSIDOMLOCKEDFILE
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NS_DECL_NSIRUNNABLE
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NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(LockedFile, nsDOMEventTargetHelper)
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enum RequestMode
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{
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NORMAL = 0, // Sequential
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PARALLEL
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};
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enum ReadyState
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{
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INITIAL = 0,
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LOADING,
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FINISHING,
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DONE
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};
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static already_AddRefed<LockedFile>
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Create(FileHandle* aFileHandle,
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FileMode aMode,
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RequestMode aRequestMode = NORMAL);
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// nsIDOMEventTarget
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virtual nsresult
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PreHandleEvent(nsEventChainPreVisitor& aVisitor) MOZ_OVERRIDE;
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nsresult
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CreateParallelStream(nsISupports** aStream);
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nsresult
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GetOrCreateStream(nsISupports** aStream);
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bool
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IsOpen() const;
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bool
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IsAborted() const
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{
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return mAborted;
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}
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FileHandle*
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Handle() const
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{
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return mFileHandle;
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}
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nsresult
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OpenInputStream(bool aWholeFile, uint64_t aStart, uint64_t aLength,
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nsIInputStream** aResult);
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private:
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LockedFile();
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~LockedFile();
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void
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OnNewRequest();
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void
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OnRequestFinished();
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inline already_AddRefed<FileRequest>
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GenerateFileRequest();
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nsresult
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WriteOrAppend(const jsval& aValue, JSContext* aCx,
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nsISupports** _retval, bool aAppend);
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nsresult
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Finish();
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nsRefPtr<FileHandle> mFileHandle;
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ReadyState mReadyState;
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FileMode mMode;
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RequestMode mRequestMode;
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uint64_t mLocation;
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uint32_t mPendingRequests;
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nsTArray<nsCOMPtr<nsISupports> > mParallelStreams;
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nsCOMPtr<nsISupports> mStream;
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bool mAborted;
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bool mCreating;
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};
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class FinishHelper MOZ_FINAL : public nsIRunnable
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{
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friend class LockedFile;
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public:
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NS_DECL_THREADSAFE_ISUPPORTS
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NS_DECL_NSIRUNNABLE
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private:
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FinishHelper(LockedFile* aLockedFile);
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~FinishHelper()
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{ }
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nsRefPtr<LockedFile> mLockedFile;
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nsTArray<nsCOMPtr<nsISupports> > mParallelStreams;
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nsCOMPtr<nsISupports> mStream;
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bool mAborted;
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};
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END_FILE_NAMESPACE
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#endif // mozilla_dom_file_lockedfile_h__
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