Source code

Revision control

Other Tools

/* -*- 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 */
#ifndef nsTransferable_h__
#define nsTransferable_h__
#include "nsIFormatConverter.h"
#include "nsITransferable.h"
#include "nsCOMPtr.h"
#include "nsString.h"
#include "nsTArray.h"
#include "nsIPrincipal.h"
#include "prio.h"
#include "mozilla/Maybe.h"
class nsIMutableArray;
// DataStruct
// Holds a flavor (a mime type) that describes the data and the associated data.
struct DataStruct {
explicit DataStruct(const char* aFlavor)
: mCacheFD(nullptr), mFlavor(aFlavor) {}
DataStruct(DataStruct&& aRHS);
const nsCString& GetFlavor() const { return mFlavor; }
void SetData(nsISupports* aData, bool aIsPrivateData);
void GetData(nsISupports** aData);
bool IsDataAvailable() const { return mData || mCacheFD; }
enum {
// The size of data over which we write the data to disk rather than
// keep it around in memory.
kLargeDatasetSize = 1000000 // 1 million bytes
nsresult WriteCache(void* aData, uint32_t aDataLen);
nsresult ReadCache(nsISupports** aData);
// mData OR mCacheFD should be used, not both.
nsCOMPtr<nsISupports> mData; // OWNER - some varient of primitive wrapper
PRFileDesc* mCacheFD;
const nsCString mFlavor;
DataStruct(const DataStruct&) = delete;
DataStruct& operator=(const DataStruct&) = delete;
* XP Transferable wrapper
class nsTransferable : public nsITransferable {
// nsISupports
virtual ~nsTransferable();
// Get flavors w/out converter
void GetTransferDataFlavors(nsTArray<nsCString>& aFlavors);
// Find index for data with the matching flavor in mDataArray.
mozilla::Maybe<size_t> FindDataFlavor(const char* aFlavor);
nsTArray<DataStruct> mDataArray;
nsCOMPtr<nsIFormatConverter> mFormatConv;
bool mPrivateData;
nsCOMPtr<nsIPrincipal> mRequestingPrincipal;
nsContentPolicyType mContentPolicyType;
bool mInitialized;
#endif // nsTransferable_h__