widget/xpwidgets/nsTransferable.h@ac0c01689b40
widget/xpwidgets/nsTransferable.h
Thu, 15 Jan 2015 15:59:08 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Thu, 15 Jan 2015 15:59:08 +0100
- branch
- TOR_BUG_9701
- changeset 10
- ac0c01689b40
- parent 0
- 6474c204b198
- child 11
- deefc01c0e14
- permissions
- -rw-r--r--
Implement a real Private Browsing Mode condition by changing the API/ABI;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.
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 );
31 void SetData( nsISupports* inData, uint32_t inDataLen, bool inPrivBrowse );
32 void GetData( nsISupports** outData, uint32_t *outDataLen );
33 already_AddRefed<nsIFile> GetFileSpec(const char* aFileName);
34 bool IsDataAvailable() const { return (mData && mDataLen > 0) || (!mData && mCacheFileName); }
36 protected:
38 enum {
39 // The size of data over which we write the data to disk rather than
40 // keep it around in memory.
41 kLargeDatasetSize = 1000000 // 1 million bytes
42 };
44 nsresult WriteCache(nsISupports* aData, uint32_t aDataLen );
45 nsresult ReadCache(nsISupports** aData, uint32_t* aDataLen );
47 nsCOMPtr<nsISupports> mData; // OWNER - some varient of primitive wrapper
48 uint32_t mDataLen;
49 const nsCString mFlavor;
50 char * mCacheFileName;
52 };
54 /**
55 * XP Transferable wrapper
56 */
58 class nsTransferable : public nsITransferable
59 {
60 public:
62 nsTransferable();
63 virtual ~nsTransferable();
65 // nsISupports
66 NS_DECL_ISUPPORTS
67 NS_DECL_NSITRANSFERABLE
69 protected:
71 // get flavors w/out converter
72 nsresult GetTransferDataFlavors(nsISupportsArray** aDataFlavorList);
74 nsTArray<DataStruct> mDataArray;
75 nsCOMPtr<nsIFormatConverter> mFormatConv;
76 bool mPrivateData;
77 #if DEBUG
78 bool mInitialized;
79 #endif
81 };
83 #endif // nsTransferable_h__
