The Tor Browser: widget/xpwidgets/nsTransferable.h@b8a032363ba2

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

     1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

     2 /* This Source Code Form is subject to the terms of the Mozilla Public

     3  * License, v. 2.0. If a copy of the MPL was not distributed with this

     4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

     6 #ifndef nsTransferable_h__

     7 #define nsTransferable_h__

     9 #include "nsIFormatConverter.h"

    10 #include "nsITransferable.h"

    11 #include "nsCOMPtr.h"

    12 #include "nsString.h"

    13 #include "nsTArray.h"

    15 class nsString;

    16 class nsDataObj;

    18 //

    19 // DataStruct

    20 //

    21 // Holds a flavor (a mime type) that describes the data and the associated data.

    22 //

    23 struct DataStruct

    24 {

    25   DataStruct ( const char* aFlavor )

    26     : mDataLen(0), mFlavor(aFlavor), mCacheFileName(nullptr) { }

    27   ~DataStruct();

    29   const nsCString& GetFlavor() const { return mFlavor; }

    30   void SetData( nsISupports* inData, uint32_t inDataLen, bool aIsPrivateData );

    31   void GetData( nsISupports** outData, uint32_t *outDataLen );

    32   already_AddRefed<nsIFile> GetFileSpec(const char* aFileName);

    33   bool IsDataAvailable() const { return (mData && mDataLen > 0) || (!mData && mCacheFileName); }

    35 protected:

    37   enum {

    38     // The size of data over which we write the data to disk rather than

    39     // keep it around in memory.

    40     kLargeDatasetSize = 1000000        // 1 million bytes

    41   };

    43   nsresult WriteCache(nsISupports* aData, uint32_t aDataLen );

    44   nsresult ReadCache(nsISupports** aData, uint32_t* aDataLen );

    46   nsCOMPtr<nsISupports> mData;   // OWNER - some varient of primitive wrapper

    47   uint32_t mDataLen;

    48   const nsCString mFlavor;

    49   char *   mCacheFileName;

    51 };

    53 /**

    54  * XP Transferable wrapper

    55  */

    57 class nsTransferable : public nsITransferable

    58 {

    59 public:

    61   nsTransferable();

    62   virtual ~nsTransferable();

    64     // nsISupports

    65   NS_DECL_ISUPPORTS

    66   NS_DECL_NSITRANSFERABLE

    68 protected:

    70     // get flavors w/out converter

    71   nsresult GetTransferDataFlavors(nsISupportsArray** aDataFlavorList);

    73   nsTArray<DataStruct> mDataArray;

    74   nsCOMPtr<nsIFormatConverter> mFormatConv;

    75   bool mPrivateData;

    76 #if DEBUG

    77   bool mInitialized;

    78 #endif

    80 };

    82 #endif // nsTransferable_h__

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