michael@0: /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #ifndef nsTransferable_h__
michael@0: #define nsTransferable_h__
michael@0: 
michael@0: #include "nsIFormatConverter.h"
michael@0: #include "nsITransferable.h"
michael@0: #include "nsCOMPtr.h"
michael@0: #include "nsString.h"
michael@0: #include "nsTArray.h"
michael@0: 
michael@0: class nsString;
michael@0: class nsDataObj;
michael@0: 
michael@0: //
michael@0: // DataStruct
michael@0: //
michael@0: // Holds a flavor (a mime type) that describes the data and the associated data.
michael@0: //
michael@0: struct DataStruct
michael@0: {
michael@0:   DataStruct ( const char* aFlavor )
michael@0:     : mDataLen(0), mFlavor(aFlavor), mCacheFileName(nullptr) { }
michael@0:   ~DataStruct();
michael@0:   
michael@0:   const nsCString& GetFlavor() const { return mFlavor; }
michael@15:   void SetData( nsISupports* inData, uint32_t inDataLen, bool aIsPrivateData );
michael@0:   void GetData( nsISupports** outData, uint32_t *outDataLen );
michael@0:   already_AddRefed<nsIFile> GetFileSpec(const char* aFileName);
michael@0:   bool IsDataAvailable() const { return (mData && mDataLen > 0) || (!mData && mCacheFileName); }
michael@0:   
michael@0: protected:
michael@0: 
michael@0:   enum {
michael@0:     // The size of data over which we write the data to disk rather than
michael@0:     // keep it around in memory.
michael@0:     kLargeDatasetSize = 1000000        // 1 million bytes
michael@0:   };
michael@0:   
michael@0:   nsresult WriteCache(nsISupports* aData, uint32_t aDataLen );
michael@0:   nsresult ReadCache(nsISupports** aData, uint32_t* aDataLen );
michael@0:   
michael@0:   nsCOMPtr<nsISupports> mData;   // OWNER - some varient of primitive wrapper
michael@0:   uint32_t mDataLen;
michael@0:   const nsCString mFlavor;
michael@0:   char *   mCacheFileName;
michael@0: 
michael@0: };
michael@0: 
michael@0: /**
michael@0:  * XP Transferable wrapper
michael@0:  */
michael@0: 
michael@0: class nsTransferable : public nsITransferable
michael@0: {
michael@0: public:
michael@0: 
michael@0:   nsTransferable();
michael@0:   virtual ~nsTransferable();
michael@0: 
michael@0:     // nsISupports
michael@0:   NS_DECL_ISUPPORTS
michael@0:   NS_DECL_NSITRANSFERABLE
michael@0: 
michael@0: protected:
michael@0: 
michael@0:     // get flavors w/out converter
michael@0:   nsresult GetTransferDataFlavors(nsISupportsArray** aDataFlavorList);
michael@0:  
michael@0:   nsTArray<DataStruct> mDataArray;
michael@0:   nsCOMPtr<nsIFormatConverter> mFormatConv;
michael@0:   bool mPrivateData;
michael@0: #if DEBUG
michael@0:   bool mInitialized;
michael@0: #endif
michael@0: 
michael@0: };
michael@0: 
michael@0: #endif // nsTransferable_h__