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