gecko-dev/dom/base/File.h

896 lines
25 KiB
C++

/* -*- Mode: C++; tab-width: 2; 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_File_h
#define mozilla_dom_File_h
#include "mozilla/Attributes.h"
#include "mozilla/GuardObjects.h"
#include "mozilla/LinkedList.h"
#include "mozilla/StaticMutex.h"
#include "mozilla/StaticPtr.h"
#include "mozilla/dom/Date.h"
#include "mozilla/dom/indexedDB/FileInfo.h"
#include "mozilla/dom/indexedDB/FileManager.h"
#include "mozilla/dom/indexedDB/IndexedDatabaseManager.h"
#include "nsAutoPtr.h"
#include "nsCycleCollectionParticipant.h"
#include "nsCOMPtr.h"
#include "nsIDOMFile.h"
#include "nsIDOMFileList.h"
#include "nsIFile.h"
#include "nsIMutable.h"
#include "nsIXMLHttpRequest.h"
#include "nsString.h"
#include "nsTemporaryFileInputStream.h"
#include "nsWrapperCache.h"
#include "nsWeakReference.h"
class nsDOMMultipartFile;
class nsIFile;
class nsIInputStream;
class nsIClassInfo;
#define FILEIMPL_IID \
{ 0xbccb3275, 0x6778, 0x4ac5, \
{ 0xaf, 0x03, 0x90, 0xed, 0x37, 0xad, 0xdf, 0x5d } }
namespace mozilla {
namespace dom {
namespace indexedDB {
class FileInfo;
};
struct BlobPropertyBag;
struct ChromeFilePropertyBag;
struct FilePropertyBag;
class FileImpl;
class OwningArrayBufferOrArrayBufferViewOrBlobOrString;
class File MOZ_FINAL : public nsIDOMFile
, public nsIXHRSendable
, public nsIMutable
, public nsSupportsWeakReference
, public nsWrapperCache
{
public:
NS_DECL_NSIDOMBLOB
NS_DECL_NSIDOMFILE
NS_DECL_NSIXHRSENDABLE
NS_DECL_NSIMUTABLE
NS_DECL_CYCLE_COLLECTING_ISUPPORTS
NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS_AMBIGUOUS(File, nsIDOMFile)
static already_AddRefed<File>
Create(nsISupports* aParent, const nsAString& aName,
const nsAString& aContentType, uint64_t aLength,
uint64_t aLastModifiedDate);
static already_AddRefed<File>
Create(nsISupports* aParent, const nsAString& aName,
const nsAString& aContentType, uint64_t aLength);
static already_AddRefed<File>
Create(nsISupports* aParent, const nsAString& aContentType,
uint64_t aLength);
static already_AddRefed<File>
Create(nsISupports* aParent, const nsAString& aContentType, uint64_t aStart,
uint64_t aLength);
// The returned File takes ownership of aMemoryBuffer. aMemoryBuffer will be
// freed by moz_free so it must be allocated by moz_malloc or something
// compatible with it.
static already_AddRefed<File>
CreateMemoryFile(nsISupports* aParent, void* aMemoryBuffer, uint64_t aLength,
const nsAString& aName, const nsAString& aContentType,
uint64_t aLastModifiedDate);
// The returned File takes ownership of aMemoryBuffer. aMemoryBuffer will be
// freed by moz_free so it must be allocated by moz_malloc or something
// compatible with it.
static already_AddRefed<File>
CreateMemoryFile(nsISupports* aParent, void* aMemoryBuffer, uint64_t aLength,
const nsAString& aContentType);
static already_AddRefed<File>
CreateTemporaryFileBlob(nsISupports* aParent, PRFileDesc* aFD,
uint64_t aStartPos, uint64_t aLength,
const nsAString& aContentType);
static already_AddRefed<File>
CreateFromFile(nsISupports* aParent, nsIFile* aFile, bool aTemporary = false);
static already_AddRefed<File>
CreateFromFile(nsISupports* aParent, const nsAString& aContentType,
uint64_t aLength, nsIFile* aFile,
indexedDB::FileInfo* aFileInfo);
static already_AddRefed<File>
CreateFromFile(nsISupports* aParent, const nsAString& aName,
const nsAString& aContentType, uint64_t aLength,
nsIFile* aFile, indexedDB::FileInfo* aFileInfo);
static already_AddRefed<File>
CreateFromFile(nsISupports* aParent, nsIFile* aFile,
indexedDB::FileInfo* aFileInfo);
static already_AddRefed<File>
CreateFromFile(nsISupports* aParent, nsIFile* aFile, const nsAString& aName,
const nsAString& aContentType);
File(nsISupports* aParent, FileImpl* aImpl);
FileImpl* Impl() const
{
return mImpl;
}
const nsTArray<nsRefPtr<FileImpl>>* GetSubBlobImpls() const;
bool IsSizeUnknown() const;
bool IsDateUnknown() const;
bool IsFile() const;
already_AddRefed<File>
CreateSlice(uint64_t aStart, uint64_t aLength, const nsAString& aContentType,
ErrorResult& aRv);
// WebIDL methods
nsISupports* GetParentObject() const
{
return mParent;
}
// Blob constructor
static already_AddRefed<File>
Constructor(const GlobalObject& aGlobal, ErrorResult& aRv);
// Blob constructor
static already_AddRefed<File>
Constructor(const GlobalObject& aGlobal,
const Sequence<OwningArrayBufferOrArrayBufferViewOrBlobOrString>& aData,
const BlobPropertyBag& aBag,
ErrorResult& aRv);
// File constructor
static already_AddRefed<File>
Constructor(const GlobalObject& aGlobal,
const Sequence<OwningArrayBufferOrArrayBufferViewOrBlobOrString>& aData,
const nsAString& aName,
const FilePropertyBag& aBag,
ErrorResult& aRv);
// File constructor - ChromeOnly
static already_AddRefed<File>
Constructor(const GlobalObject& aGlobal,
File& aData,
const ChromeFilePropertyBag& aBag,
ErrorResult& aRv);
// File constructor - ChromeOnly
static already_AddRefed<File>
Constructor(const GlobalObject& aGlobal,
const nsAString& aData,
const ChromeFilePropertyBag& aBag,
ErrorResult& aRv);
// File constructor - ChromeOnly
static already_AddRefed<File>
Constructor(const GlobalObject& aGlobal,
nsIFile* aData,
const ChromeFilePropertyBag& aBag,
ErrorResult& aRv);
virtual JSObject* WrapObject(JSContext* aCx) MOZ_OVERRIDE;
uint64_t GetSize(ErrorResult& aRv);
// XPCOM GetType is OK
// XPCOM GetName is OK
int64_t GetLastModified(ErrorResult& aRv);
Date GetLastModifiedDate(ErrorResult& aRv);
void GetMozFullPath(nsAString& aFilename, ErrorResult& aRv);
already_AddRefed<File> Slice(const Optional<int64_t>& aStart,
const Optional<int64_t>& aEnd,
const nsAString& aContentType,
ErrorResult& aRv);
private:
~File() {};
// The member is the real backend implementation of this File/Blob.
// It's thread-safe and not CC-able and it's the only element that is moved
// between threads.
// Note: we should not store any other state in this class!
nsRefPtr<FileImpl> mImpl;
nsCOMPtr<nsISupports> mParent;
};
// This is the abstract class for any File backend. It must be nsISupports
// because this class must be ref-counted and it has to work with IPC.
class FileImpl : public nsISupports
{
public:
NS_DECLARE_STATIC_IID_ACCESSOR(FILEIMPL_IID)
NS_DECL_THREADSAFE_ISUPPORTS
FileImpl() {}
virtual void GetName(nsAString& aName) = 0;
virtual nsresult GetPath(nsAString& aName) = 0;
virtual int64_t GetLastModified(ErrorResult& aRv) = 0;
virtual void SetLastModified(int64_t aLastModified) = 0;
virtual void GetMozFullPath(nsAString& aName, ErrorResult& aRv) = 0;
virtual void GetMozFullPathInternal(nsAString& aFileName, ErrorResult& aRv) = 0;
virtual uint64_t GetSize(ErrorResult& aRv) = 0;
virtual void GetType(nsAString& aType) = 0;
already_AddRefed<FileImpl>
Slice(const Optional<int64_t>& aStart, const Optional<int64_t>& aEnd,
const nsAString& aContentType, ErrorResult& aRv);
virtual already_AddRefed<FileImpl>
CreateSlice(uint64_t aStart, uint64_t aLength,
const nsAString& aContentType, ErrorResult& aRv) = 0;
virtual const nsTArray<nsRefPtr<FileImpl>>*
GetSubBlobImpls() const = 0;
virtual nsresult GetInternalStream(nsIInputStream** aStream) = 0;
virtual int64_t GetFileId() = 0;
virtual void AddFileInfo(indexedDB::FileInfo* aFileInfo) = 0;
virtual indexedDB::FileInfo*
GetFileInfo(indexedDB::FileManager* aFileManager) = 0;
virtual nsresult GetSendInfo(nsIInputStream** aBody,
uint64_t* aContentLength,
nsACString& aContentType,
nsACString& aCharset) = 0;
virtual nsresult GetMutable(bool* aMutable) const = 0;
virtual nsresult SetMutable(bool aMutable) = 0;
virtual void SetLazyData(const nsAString& aName,
const nsAString& aContentType,
uint64_t aLength,
uint64_t aLastModifiedDate) = 0;
virtual bool IsMemoryFile() const = 0;
virtual bool IsSizeUnknown() const = 0;
virtual bool IsDateUnknown() const = 0;
virtual bool IsFile() const = 0;
// True if this implementation can be sent to other threads.
virtual bool MayBeClonedToOtherThreads() const
{
return true;
}
protected:
virtual ~FileImpl() {}
};
NS_DEFINE_STATIC_IID_ACCESSOR(FileImpl, FILEIMPL_IID)
class FileImplBase : public FileImpl
{
public:
FileImplBase(const nsAString& aName, const nsAString& aContentType,
uint64_t aLength, uint64_t aLastModifiedDate)
: mIsFile(true)
, mImmutable(false)
, mContentType(aContentType)
, mName(aName)
, mStart(0)
, mLength(aLength)
, mLastModificationDate(aLastModifiedDate)
{
// Ensure non-null mContentType by default
mContentType.SetIsVoid(false);
}
FileImplBase(const nsAString& aName, const nsAString& aContentType,
uint64_t aLength)
: mIsFile(true)
, mImmutable(false)
, mContentType(aContentType)
, mName(aName)
, mStart(0)
, mLength(aLength)
, mLastModificationDate(UINT64_MAX)
{
// Ensure non-null mContentType by default
mContentType.SetIsVoid(false);
}
FileImplBase(const nsAString& aContentType, uint64_t aLength)
: mIsFile(false)
, mImmutable(false)
, mContentType(aContentType)
, mStart(0)
, mLength(aLength)
, mLastModificationDate(UINT64_MAX)
{
// Ensure non-null mContentType by default
mContentType.SetIsVoid(false);
}
FileImplBase(const nsAString& aContentType, uint64_t aStart,
uint64_t aLength)
: mIsFile(false)
, mImmutable(false)
, mContentType(aContentType)
, mStart(aStart)
, mLength(aLength)
, mLastModificationDate(UINT64_MAX)
{
NS_ASSERTION(aLength != UINT64_MAX,
"Must know length when creating slice");
// Ensure non-null mContentType by default
mContentType.SetIsVoid(false);
}
virtual void GetName(nsAString& aName) MOZ_OVERRIDE;
virtual nsresult GetPath(nsAString& aName) MOZ_OVERRIDE;
virtual int64_t GetLastModified(ErrorResult& aRv) MOZ_OVERRIDE;
virtual void SetLastModified(int64_t aLastModified) MOZ_OVERRIDE;
virtual void GetMozFullPath(nsAString& aName, ErrorResult& aRv) MOZ_OVERRIDE;
virtual void GetMozFullPathInternal(nsAString& aFileName,
ErrorResult& aRv) MOZ_OVERRIDE;
virtual uint64_t GetSize(ErrorResult& aRv) MOZ_OVERRIDE
{
return mLength;
}
virtual void GetType(nsAString& aType) MOZ_OVERRIDE;
virtual already_AddRefed<FileImpl>
CreateSlice(uint64_t aStart, uint64_t aLength,
const nsAString& aContentType, ErrorResult& aRv) MOZ_OVERRIDE
{
return nullptr;
}
virtual const nsTArray<nsRefPtr<FileImpl>>*
GetSubBlobImpls() const MOZ_OVERRIDE
{
return nullptr;
}
virtual nsresult GetInternalStream(nsIInputStream** aStream) MOZ_OVERRIDE
{
return NS_ERROR_NOT_IMPLEMENTED;
}
virtual int64_t GetFileId() MOZ_OVERRIDE;
virtual void AddFileInfo(indexedDB::FileInfo* aFileInfo) MOZ_OVERRIDE;
virtual indexedDB::FileInfo*
GetFileInfo(indexedDB::FileManager* aFileManager) MOZ_OVERRIDE;
virtual nsresult GetSendInfo(nsIInputStream** aBody,
uint64_t* aContentLength,
nsACString& aContentType,
nsACString& aCharset) MOZ_OVERRIDE;
virtual nsresult GetMutable(bool* aMutable) const MOZ_OVERRIDE;
virtual nsresult SetMutable(bool aMutable) MOZ_OVERRIDE;
virtual void
SetLazyData(const nsAString& aName, const nsAString& aContentType,
uint64_t aLength, uint64_t aLastModifiedDate) MOZ_OVERRIDE
{
NS_ASSERTION(aLength, "must have length");
mName = aName;
mContentType = aContentType;
mLength = aLength;
mLastModificationDate = aLastModifiedDate;
mIsFile = !aName.IsVoid();
}
virtual bool IsMemoryFile() const MOZ_OVERRIDE
{
return false;
}
virtual bool IsDateUnknown() const MOZ_OVERRIDE
{
return mIsFile && mLastModificationDate == UINT64_MAX;
}
virtual bool IsFile() const MOZ_OVERRIDE
{
return mIsFile;
}
virtual bool IsStoredFile() const
{
return false;
}
virtual bool IsWholeFile() const
{
NS_NOTREACHED("Should only be called on dom blobs backed by files!");
return false;
}
virtual bool IsSnapshot() const
{
return false;
}
virtual bool IsSizeUnknown() const MOZ_OVERRIDE
{
return mLength == UINT64_MAX;
}
protected:
virtual ~FileImplBase() {}
indexedDB::FileInfo* GetFileInfo() const
{
NS_ASSERTION(IsStoredFile(), "Should only be called on stored files!");
NS_ASSERTION(!mFileInfos.IsEmpty(), "Must have at least one file info!");
return mFileInfos.ElementAt(0);
}
bool mIsFile;
bool mImmutable;
nsString mContentType;
nsString mName;
nsString mPath; // The path relative to a directory chosen by the user
uint64_t mStart;
uint64_t mLength;
uint64_t mLastModificationDate;
// Protected by IndexedDatabaseManager::FileMutex()
nsTArray<nsRefPtr<indexedDB::FileInfo>> mFileInfos;
};
/**
* This class may be used off the main thread, and in particular, its
* constructor and destructor may not run on the same thread. Be careful!
*/
class FileImplMemory MOZ_FINAL : public FileImplBase
{
public:
NS_DECL_ISUPPORTS_INHERITED
FileImplMemory(void* aMemoryBuffer, uint64_t aLength, const nsAString& aName,
const nsAString& aContentType, uint64_t aLastModifiedDate)
: FileImplBase(aName, aContentType, aLength, aLastModifiedDate)
, mDataOwner(new DataOwner(aMemoryBuffer, aLength))
{
NS_ASSERTION(mDataOwner && mDataOwner->mData, "must have data");
}
FileImplMemory(void* aMemoryBuffer, uint64_t aLength,
const nsAString& aContentType)
: FileImplBase(aContentType, aLength)
, mDataOwner(new DataOwner(aMemoryBuffer, aLength))
{
NS_ASSERTION(mDataOwner && mDataOwner->mData, "must have data");
}
virtual nsresult GetInternalStream(nsIInputStream** aStream) MOZ_OVERRIDE;
virtual already_AddRefed<FileImpl>
CreateSlice(uint64_t aStart, uint64_t aLength,
const nsAString& aContentType, ErrorResult& aRv) MOZ_OVERRIDE;
virtual bool IsMemoryFile() const MOZ_OVERRIDE
{
return true;
}
class DataOwner MOZ_FINAL : public mozilla::LinkedListElement<DataOwner> {
public:
NS_INLINE_DECL_THREADSAFE_REFCOUNTING(DataOwner)
DataOwner(void* aMemoryBuffer, uint64_t aLength)
: mData(aMemoryBuffer)
, mLength(aLength)
{
mozilla::StaticMutexAutoLock lock(sDataOwnerMutex);
if (!sDataOwners) {
sDataOwners = new mozilla::LinkedList<DataOwner>();
EnsureMemoryReporterRegistered();
}
sDataOwners->insertBack(this);
}
private:
// Private destructor, to discourage deletion outside of Release():
~DataOwner() {
mozilla::StaticMutexAutoLock lock(sDataOwnerMutex);
remove();
if (sDataOwners->isEmpty()) {
// Free the linked list if it's empty.
sDataOwners = nullptr;
}
moz_free(mData);
}
public:
static void EnsureMemoryReporterRegistered();
// sDataOwners and sMemoryReporterRegistered may only be accessed while
// holding sDataOwnerMutex! You also must hold the mutex while touching
// elements of the linked list that DataOwner inherits from.
static mozilla::StaticMutex sDataOwnerMutex;
static mozilla::StaticAutoPtr<mozilla::LinkedList<DataOwner> > sDataOwners;
static bool sMemoryReporterRegistered;
void* mData;
uint64_t mLength;
};
private:
// Create slice
FileImplMemory(const FileImplMemory* aOther, uint64_t aStart,
uint64_t aLength, const nsAString& aContentType)
: FileImplBase(aContentType, aOther->mStart + aStart, aLength)
, mDataOwner(aOther->mDataOwner)
{
NS_ASSERTION(mDataOwner && mDataOwner->mData, "must have data");
mImmutable = aOther->mImmutable;
}
~FileImplMemory() {}
// Used when backed by a memory store
nsRefPtr<DataOwner> mDataOwner;
};
class FileImplTemporaryFileBlob MOZ_FINAL : public FileImplBase
{
public:
NS_DECL_ISUPPORTS_INHERITED
FileImplTemporaryFileBlob(PRFileDesc* aFD, uint64_t aStartPos,
uint64_t aLength, const nsAString& aContentType)
: FileImplBase(aContentType, aLength)
, mLength(aLength)
, mStartPos(aStartPos)
, mContentType(aContentType)
{
mFileDescOwner = new nsTemporaryFileInputStream::FileDescOwner(aFD);
}
virtual nsresult GetInternalStream(nsIInputStream** aStream) MOZ_OVERRIDE;
virtual already_AddRefed<FileImpl>
CreateSlice(uint64_t aStart, uint64_t aLength,
const nsAString& aContentType, ErrorResult& aRv) MOZ_OVERRIDE;
private:
FileImplTemporaryFileBlob(const FileImplTemporaryFileBlob* aOther,
uint64_t aStart, uint64_t aLength,
const nsAString& aContentType)
: FileImplBase(aContentType, aLength)
, mLength(aLength)
, mStartPos(aStart)
, mFileDescOwner(aOther->mFileDescOwner)
, mContentType(aContentType) {}
~FileImplTemporaryFileBlob() {}
uint64_t mLength;
uint64_t mStartPos;
nsRefPtr<nsTemporaryFileInputStream::FileDescOwner> mFileDescOwner;
nsString mContentType;
};
class FileImplFile : public FileImplBase
{
public:
NS_DECL_ISUPPORTS_INHERITED
// Create as a file
explicit FileImplFile(nsIFile* aFile, bool aTemporary = false)
: FileImplBase(EmptyString(), EmptyString(), UINT64_MAX, UINT64_MAX)
, mFile(aFile)
, mWholeFile(true)
, mStoredFile(false)
, mIsTemporary(aTemporary)
{
NS_ASSERTION(mFile, "must have file");
// Lazily get the content type and size
mContentType.SetIsVoid(true);
mFile->GetLeafName(mName);
}
FileImplFile(nsIFile* aFile, indexedDB::FileInfo* aFileInfo)
: FileImplBase(EmptyString(), EmptyString(), UINT64_MAX, UINT64_MAX)
, mFile(aFile)
, mWholeFile(true)
, mStoredFile(true)
, mIsTemporary(false)
{
NS_ASSERTION(mFile, "must have file");
NS_ASSERTION(aFileInfo, "must have file info");
// Lazily get the content type and size
mContentType.SetIsVoid(true);
mFile->GetLeafName(mName);
mFileInfos.AppendElement(aFileInfo);
}
// Create as a file
FileImplFile(const nsAString& aName, const nsAString& aContentType,
uint64_t aLength, nsIFile* aFile)
: FileImplBase(aName, aContentType, aLength, UINT64_MAX)
, mFile(aFile)
, mWholeFile(true)
, mStoredFile(false)
, mIsTemporary(false)
{
NS_ASSERTION(mFile, "must have file");
}
FileImplFile(const nsAString& aName, const nsAString& aContentType,
uint64_t aLength, nsIFile* aFile,
uint64_t aLastModificationDate)
: FileImplBase(aName, aContentType, aLength, aLastModificationDate)
, mFile(aFile)
, mWholeFile(true)
, mStoredFile(false)
, mIsTemporary(false)
{
NS_ASSERTION(mFile, "must have file");
}
// Create as a file with custom name
FileImplFile(nsIFile* aFile, const nsAString& aName,
const nsAString& aContentType)
: FileImplBase(aName, aContentType, UINT64_MAX, UINT64_MAX)
, mFile(aFile)
, mWholeFile(true)
, mStoredFile(false)
, mIsTemporary(false)
{
NS_ASSERTION(mFile, "must have file");
if (aContentType.IsEmpty()) {
// Lazily get the content type and size
mContentType.SetIsVoid(true);
}
}
// Create as a stored file
FileImplFile(const nsAString& aName, const nsAString& aContentType,
uint64_t aLength, nsIFile* aFile,
indexedDB::FileInfo* aFileInfo)
: FileImplBase(aName, aContentType, aLength, UINT64_MAX)
, mFile(aFile)
, mWholeFile(true)
, mStoredFile(true)
, mIsTemporary(false)
{
NS_ASSERTION(mFile, "must have file");
mFileInfos.AppendElement(aFileInfo);
}
// Create as a stored blob
FileImplFile(const nsAString& aContentType, uint64_t aLength,
nsIFile* aFile, indexedDB::FileInfo* aFileInfo)
: FileImplBase(aContentType, aLength)
, mFile(aFile)
, mWholeFile(true)
, mStoredFile(true)
, mIsTemporary(false)
{
NS_ASSERTION(mFile, "must have file");
mFileInfos.AppendElement(aFileInfo);
}
// Create as a file to be later initialized
FileImplFile()
: FileImplBase(EmptyString(), EmptyString(), UINT64_MAX, UINT64_MAX)
, mWholeFile(true)
, mStoredFile(false)
, mIsTemporary(false)
{
// Lazily get the content type and size
mContentType.SetIsVoid(true);
mName.SetIsVoid(true);
}
// Overrides
virtual uint64_t GetSize(ErrorResult& aRv) MOZ_OVERRIDE;
virtual void GetType(nsAString& aType) MOZ_OVERRIDE;
virtual int64_t GetLastModified(ErrorResult& aRv) MOZ_OVERRIDE;
virtual void SetLastModified(int64_t aLastModified) MOZ_OVERRIDE;
virtual void GetMozFullPathInternal(nsAString& aFullPath,
ErrorResult& aRv) MOZ_OVERRIDE;
virtual nsresult GetInternalStream(nsIInputStream**) MOZ_OVERRIDE;
void SetPath(const nsAString& aFullPath);
protected:
virtual ~FileImplFile() {
if (mFile && mIsTemporary) {
NS_WARNING("In temporary ~FileImplFile");
// Ignore errors if any, not much we can do. Clean-up will be done by
// https://mxr.mozilla.org/mozilla-central/source/xpcom/io/nsAnonymousTemporaryFile.cpp?rev=6c1c7e45c902#127
#ifdef DEBUG
nsresult rv =
#endif
mFile->Remove(false);
NS_WARN_IF_FALSE(NS_SUCCEEDED(rv), "Failed to remove temporary DOMFile.");
}
}
private:
// Create slice
FileImplFile(const FileImplFile* aOther, uint64_t aStart,
uint64_t aLength, const nsAString& aContentType)
: FileImplBase(aContentType, aOther->mStart + aStart, aLength)
, mFile(aOther->mFile)
, mWholeFile(false)
, mStoredFile(aOther->mStoredFile)
, mIsTemporary(false)
{
NS_ASSERTION(mFile, "must have file");
mImmutable = aOther->mImmutable;
if (mStoredFile) {
indexedDB::FileInfo* fileInfo;
using indexedDB::IndexedDatabaseManager;
if (IndexedDatabaseManager::IsClosed()) {
fileInfo = aOther->GetFileInfo();
}
else {
mozilla::MutexAutoLock lock(IndexedDatabaseManager::FileMutex());
fileInfo = aOther->GetFileInfo();
}
mFileInfos.AppendElement(fileInfo);
}
}
virtual already_AddRefed<FileImpl>
CreateSlice(uint64_t aStart, uint64_t aLength,
const nsAString& aContentType, ErrorResult& aRv) MOZ_OVERRIDE;
virtual bool IsStoredFile() const MOZ_OVERRIDE
{
return mStoredFile;
}
virtual bool IsWholeFile() const MOZ_OVERRIDE
{
return mWholeFile;
}
nsCOMPtr<nsIFile> mFile;
bool mWholeFile;
bool mStoredFile;
bool mIsTemporary;
};
class FileList MOZ_FINAL : public nsIDOMFileList,
public nsWrapperCache
{
~FileList() {}
public:
explicit FileList(nsISupports *aParent) : mParent(aParent)
{
}
NS_DECL_CYCLE_COLLECTING_ISUPPORTS
NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS(FileList)
NS_DECL_NSIDOMFILELIST
virtual JSObject* WrapObject(JSContext *cx) MOZ_OVERRIDE;
nsISupports* GetParentObject()
{
return mParent;
}
void Disconnect()
{
mParent = nullptr;
}
bool Append(File *aFile) { return mFiles.AppendElement(aFile); }
bool Remove(uint32_t aIndex) {
if (aIndex < mFiles.Length()) {
mFiles.RemoveElementAt(aIndex);
return true;
}
return false;
}
void Clear() { return mFiles.Clear(); }
static FileList* FromSupports(nsISupports* aSupports)
{
#ifdef DEBUG
{
nsCOMPtr<nsIDOMFileList> list_qi = do_QueryInterface(aSupports);
// If this assertion fires the QI implementation for the object in
// question doesn't use the nsIDOMFileList pointer as the nsISupports
// pointer. That must be fixed, or we'll crash...
NS_ASSERTION(list_qi == static_cast<nsIDOMFileList*>(aSupports),
"Uh, fix QI!");
}
#endif
return static_cast<FileList*>(aSupports);
}
File* Item(uint32_t aIndex)
{
return mFiles.SafeElementAt(aIndex);
}
File* IndexedGetter(uint32_t aIndex, bool& aFound)
{
aFound = aIndex < mFiles.Length();
return aFound ? mFiles.ElementAt(aIndex) : nullptr;
}
uint32_t Length()
{
return mFiles.Length();
}
private:
nsTArray<nsRefPtr<File>> mFiles;
nsISupports *mParent;
};
} // dom namespace
} // file namespace
#endif // mozilla_dom_File_h