author Alastor Wu <alwu@mozilla.com>
Wed, 16 Jan 2019 01:04:40 +0000
changeset 514132 1d2fcf021b32addc028800b6f0b315c7c4779b3d
parent 508163 6f3709b3878117466168c40affa7bca0b60cf75b
permissions -rw-r--r--
Bug 1520088 - part2 : ensure logging result can always be executed. r=cpearce Ensure we can always see the debug log for the autoplay result. Differential Revision: https://phabricator.services.mozilla.com/D16524

/* -*- 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 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__