1 : /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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15 : * The Original Code is mozilla.org code.
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17 : * The Initial Developer of the Original Code is
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37 :
38 : #ifndef nsTransferable_h__
39 : #define nsTransferable_h__
40 :
41 : #include "nsIFormatConverter.h"
42 : #include "nsITransferable.h"
43 : #include "nsCOMPtr.h"
44 : #include "nsString.h"
45 : #include "nsTArray.h"
46 :
47 : class nsString;
48 : class nsDataObj;
49 :
50 : //
51 : // DataStruct
52 : //
53 : // Holds a flavor (a mime type) that describes the data and the associated data.
54 : //
55 : struct DataStruct
56 0 : {
57 0 : DataStruct ( const char* aFlavor )
58 0 : : mDataLen(0), mFlavor(aFlavor), mCacheFileName(nsnull) { }
59 : ~DataStruct();
60 :
61 0 : const nsCString& GetFlavor() const { return mFlavor; }
62 : void SetData( nsISupports* inData, PRUint32 inDataLen );
63 : void GetData( nsISupports** outData, PRUint32 *outDataLen );
64 : nsIFile * GetFileSpec(const char * aFileName);
65 0 : bool IsDataAvailable() const { return (mData && mDataLen > 0) || (!mData && mCacheFileName); }
66 :
67 : protected:
68 :
69 : enum {
70 : // The size of data over which we write the data to disk rather than
71 : // keep it around in memory.
72 : kLargeDatasetSize = 1000000 // 1 million bytes
73 : };
74 :
75 : nsresult WriteCache(nsISupports* aData, PRUint32 aDataLen );
76 : nsresult ReadCache(nsISupports** aData, PRUint32* aDataLen );
77 :
78 : nsCOMPtr<nsISupports> mData; // OWNER - some varient of primitive wrapper
79 : PRUint32 mDataLen;
80 : const nsCString mFlavor;
81 : char * mCacheFileName;
82 :
83 : };
84 :
85 : /**
86 : * XP Transferable wrapper
87 : */
88 :
89 : class nsTransferable : public nsITransferable
90 : {
91 : public:
92 :
93 : nsTransferable();
94 : virtual ~nsTransferable();
95 :
96 : // nsISupports
97 : NS_DECL_ISUPPORTS
98 : NS_DECL_NSITRANSFERABLE
99 :
100 : protected:
101 :
102 : // get flavors w/out converter
103 : nsresult GetTransferDataFlavors(nsISupportsArray** aDataFlavorList);
104 :
105 : nsTArray<DataStruct> mDataArray;
106 : nsCOMPtr<nsIFormatConverter> mFormatConv;
107 :
108 : };
109 :
110 : #endif // nsTransferable_h__
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