gecko-dev/dom/file/BaseBlobImpl.h

192 строки
5.0 KiB
C++

/* -*- 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_BaseBlobImpl_h
#define mozilla_dom_BaseBlobImpl_h
#include "mozilla/dom/BlobImpl.h"
namespace mozilla {
namespace dom {
class BaseBlobImpl : public BlobImpl
{
public:
BaseBlobImpl(const nsAString& aName, const nsAString& aContentType,
uint64_t aLength, int64_t aLastModifiedDate)
: mIsFile(true)
, mImmutable(false)
, mContentType(aContentType)
, mName(aName)
, mStart(0)
, mLength(aLength)
, mLastModificationDate(aLastModifiedDate)
, mSerialNumber(NextSerialNumber())
{
// Ensure non-null mContentType by default
mContentType.SetIsVoid(false);
}
BaseBlobImpl(const nsAString& aName, const nsAString& aContentType,
uint64_t aLength)
: mIsFile(true)
, mImmutable(false)
, mContentType(aContentType)
, mName(aName)
, mStart(0)
, mLength(aLength)
, mLastModificationDate(INT64_MAX)
, mSerialNumber(NextSerialNumber())
{
// Ensure non-null mContentType by default
mContentType.SetIsVoid(false);
}
BaseBlobImpl(const nsAString& aContentType, uint64_t aLength)
: mIsFile(false)
, mImmutable(false)
, mContentType(aContentType)
, mStart(0)
, mLength(aLength)
, mLastModificationDate(INT64_MAX)
, mSerialNumber(NextSerialNumber())
{
// Ensure non-null mContentType by default
mContentType.SetIsVoid(false);
}
BaseBlobImpl(const nsAString& aContentType, uint64_t aStart,
uint64_t aLength)
: mIsFile(false)
, mImmutable(false)
, mContentType(aContentType)
, mStart(aStart)
, mLength(aLength)
, mLastModificationDate(INT64_MAX)
, mSerialNumber(NextSerialNumber())
{
MOZ_ASSERT(aLength != UINT64_MAX, "Must know length when creating slice");
// Ensure non-null mContentType by default
mContentType.SetIsVoid(false);
}
virtual void GetName(nsAString& aName) const override;
virtual void GetDOMPath(nsAString& aName) const override;
virtual void SetDOMPath(const nsAString& aName) override;
virtual int64_t GetLastModified(ErrorResult& aRv) override;
virtual void SetLastModified(int64_t aLastModified) override;
virtual void GetMozFullPath(nsAString& aName,
SystemCallerGuarantee /* unused */,
ErrorResult& aRv) const override;
virtual void GetMozFullPathInternal(nsAString& aFileName,
ErrorResult& aRv) const override;
virtual uint64_t GetSize(ErrorResult& aRv) override
{
return mLength;
}
virtual void GetType(nsAString& aType) override;
virtual uint64_t GetSerialNumber() const override { return mSerialNumber; }
virtual already_AddRefed<BlobImpl>
CreateSlice(uint64_t aStart, uint64_t aLength,
const nsAString& aContentType, ErrorResult& aRv) override
{
return nullptr;
}
virtual const nsTArray<RefPtr<BlobImpl>>*
GetSubBlobImpls() const override
{
return nullptr;
}
virtual void GetInternalStream(nsIInputStream** aStream,
ErrorResult& aRv) override
{
aRv.Throw(NS_ERROR_NOT_IMPLEMENTED);
}
virtual int64_t GetFileId() override;
virtual nsresult GetSendInfo(nsIInputStream** aBody,
uint64_t* aContentLength,
nsACString& aContentType,
nsACString& aCharset) override;
virtual nsresult GetMutable(bool* aMutable) const override;
virtual nsresult SetMutable(bool aMutable) override;
virtual void
SetLazyData(const nsAString& aName, const nsAString& aContentType,
uint64_t aLength, int64_t aLastModifiedDate) override
{
mName = aName;
mContentType = aContentType;
mLength = aLength;
mLastModificationDate = aLastModifiedDate;
mIsFile = !aName.IsVoid();
}
virtual bool IsMemoryFile() const override
{
return false;
}
virtual bool IsDateUnknown() const override
{
return mIsFile && mLastModificationDate == INT64_MAX;
}
virtual bool IsFile() const override
{
return mIsFile;
}
virtual bool IsSizeUnknown() const override
{
return mLength == UINT64_MAX;
}
protected:
virtual ~BaseBlobImpl() {}
/**
* Returns a new, effectively-unique serial number. This should be used
* by implementations to obtain a serial number for GetSerialNumber().
* The implementation is thread safe.
*/
static uint64_t NextSerialNumber();
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;
int64_t mLastModificationDate;
const uint64_t mSerialNumber;
};
} // namespace dom
} // namespace mozilla
#endif // mozilla_dom_BaseBlobImpl_h