LCOV - code coverage report
Current view: directory - content/base/src - nsDOMBlobBuilder.h (source / functions) Found Hit Coverage
Test: app.info Lines: 46 0 0.0 %
Date: 2012-06-02 Functions: 14 0 0.0 %

       1                 : /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
       2                 : /* ***** BEGIN LICENSE BLOCK *****
       3                 :  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
       4                 :  *
       5                 :  * The contents of this file are subject to the Mozilla Public License Version
       6                 :  * 1.1 (the "License"); you may not use this file except in compliance with
       7                 :  * the License. You may obtain a copy of the License at
       8                 :  * http://www.mozilla.org/MPL/
       9                 :  *
      10                 :  * Software distributed under the License is distributed on an "AS IS" basis,
      11                 :  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
      12                 :  * for the specific language governing rights and limitations under the
      13                 :  * License.
      14                 :  *
      15                 :  * The Original Code is Mozilla File API.
      16                 :  *
      17                 :  * The Initial Developer of the Original Code is
      18                 :  *   Kyle Huey <me@kylehuey.com>
      19                 :  * Portions created by the Initial Developer are Copyright (C) 2011
      20                 :  * the Initial Developer. All Rights Reserved.
      21                 :  *
      22                 :  * Contributor(s):
      23                 :  *
      24                 :  * Alternatively, the contents of this file may be used under the terms of
      25                 :  * either the GNU General Public License Version 2 or later (the "GPL"), or
      26                 :  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
      27                 :  * in which case the provisions of the GPL or the LGPL are applicable instead
      28                 :  * of those above. If you wish to allow use of your version of this file only
      29                 :  * under the terms of either the GPL or the LGPL, and not to allow others to
      30                 :  * use your version of this file under the terms of the MPL, indicate your
      31                 :  * decision by deleting the provisions above and replace them with the notice
      32                 :  * and other provisions required by the GPL or the LGPL. If you do not delete
      33                 :  * the provisions above, a recipient may use your version of this file under
      34                 :  * the terms of any one of the MPL, the GPL or the LGPL.
      35                 :  *
      36                 :  * ***** END LICENSE BLOCK ***** */
      37                 : 
      38                 : #ifndef nsDOMBlobBuilder_h
      39                 : #define nsDOMBlobBuilder_h
      40                 : 
      41                 : #include "nsDOMFile.h"
      42                 : #include "CheckedInt.h"
      43                 : 
      44                 : #include "mozilla/StandardInteger.h"
      45                 : 
      46                 : using namespace mozilla;
      47                 : 
      48                 : class nsDOMMultipartFile : public nsDOMFileBase,
      49                 :                            public nsIJSNativeInitializer
      50               0 : {
      51                 : public:
      52                 :   // Create as a file
      53               0 :   nsDOMMultipartFile(nsTArray<nsCOMPtr<nsIDOMBlob> > aBlobs,
      54                 :                      const nsAString& aName,
      55                 :                      const nsAString& aContentType)
      56                 :     : nsDOMFileBase(aName, aContentType, UINT64_MAX),
      57               0 :       mBlobs(aBlobs)
      58                 :   {
      59               0 :   }
      60                 : 
      61                 :   // Create as a blob
      62               0 :   nsDOMMultipartFile(nsTArray<nsCOMPtr<nsIDOMBlob> > aBlobs,
      63                 :                      const nsAString& aContentType)
      64                 :     : nsDOMFileBase(aContentType, UINT64_MAX),
      65               0 :       mBlobs(aBlobs)
      66                 :   {
      67               0 :   }
      68                 : 
      69                 :   // Create as a blob to be later initialized
      70               0 :   nsDOMMultipartFile()
      71               0 :     : nsDOMFileBase(EmptyString(), UINT64_MAX)
      72                 :   {
      73               0 :   }
      74                 : 
      75                 :   NS_DECL_ISUPPORTS_INHERITED
      76                 : 
      77                 :   // nsIJSNativeInitializer
      78                 :   NS_IMETHOD Initialize(nsISupports* aOwner,
      79                 :                         JSContext* aCx,
      80                 :                         JSObject* aObj,
      81                 :                         PRUint32 aArgc,
      82                 :                         jsval* aArgv);
      83                 : 
      84                 :   already_AddRefed<nsIDOMBlob>
      85                 :   CreateSlice(PRUint64 aStart, PRUint64 aLength, const nsAString& aContentType);
      86                 : 
      87                 :   NS_IMETHOD GetSize(PRUint64*);
      88                 :   NS_IMETHOD GetInternalStream(nsIInputStream**);
      89                 : 
      90                 :   // DOMClassInfo constructor (for Blob([b1, "foo"], { type: "image/png" }))
      91                 :   static nsresult
      92                 :   NewBlob(nsISupports* *aNewObject);
      93                 : 
      94                 :   virtual const nsTArray<nsCOMPtr<nsIDOMBlob> >*
      95               0 :   GetSubBlobs() const { return &mBlobs; }
      96                 : 
      97                 : protected:
      98                 :   nsTArray<nsCOMPtr<nsIDOMBlob> > mBlobs;
      99                 : };
     100                 : 
     101               0 : class BlobSet {
     102                 : public:
     103               0 :   BlobSet()
     104               0 :     : mData(nsnull), mDataLen(0), mDataBufferLen(0)
     105               0 :   {}
     106                 : 
     107                 :   nsresult AppendVoidPtr(const void* aData, PRUint32 aLength);
     108                 :   nsresult AppendString(JSString* aString, bool nativeEOL, JSContext* aCx);
     109                 :   nsresult AppendBlob(nsIDOMBlob* aBlob);
     110                 :   nsresult AppendArrayBuffer(JSObject* aBuffer);
     111                 :   nsresult AppendBlobs(const nsTArray<nsCOMPtr<nsIDOMBlob> >& aBlob);
     112                 : 
     113               0 :   nsTArray<nsCOMPtr<nsIDOMBlob> >& GetBlobs() { Flush(); return mBlobs; }
     114                 : 
     115                 : protected:
     116               0 :   bool ExpandBufferSize(PRUint64 aSize)
     117                 :   {
     118               0 :     if (mDataBufferLen >= mDataLen + aSize) {
     119               0 :       mDataLen += aSize;
     120               0 :       return true;
     121                 :     }
     122                 : 
     123                 :     // Start at 1 or we'll loop forever.
     124               0 :     CheckedUint32 bufferLen = NS_MAX<PRUint32>(mDataBufferLen, 1);
     125               0 :     while (bufferLen.valid() && bufferLen.value() < mDataLen + aSize)
     126               0 :       bufferLen *= 2;
     127                 : 
     128               0 :     if (!bufferLen.valid())
     129               0 :       return false;
     130                 : 
     131                 :     // PR_ memory functions are still fallible
     132               0 :     void* data = PR_Realloc(mData, bufferLen.value());
     133               0 :     if (!data)
     134               0 :       return false;
     135                 : 
     136               0 :     mData = data;
     137               0 :     mDataBufferLen = bufferLen.value();
     138               0 :     mDataLen += aSize;
     139               0 :     return true;
     140                 :   }
     141                 : 
     142               0 :   void Flush() {
     143               0 :     if (mData) {
     144                 :       // If we have some data, create a blob for it
     145                 :       // and put it on the stack
     146                 : 
     147                 :       nsCOMPtr<nsIDOMBlob> blob =
     148               0 :         new nsDOMMemoryFile(mData, mDataLen, EmptyString(), EmptyString());
     149               0 :       mBlobs.AppendElement(blob);
     150               0 :       mData = nsnull; // The nsDOMMemoryFile takes ownership of the buffer
     151               0 :       mDataLen = 0;
     152               0 :       mDataBufferLen = 0;
     153                 :     }
     154               0 :   }
     155                 : 
     156                 :   nsTArray<nsCOMPtr<nsIDOMBlob> > mBlobs;
     157                 :   void* mData;
     158                 :   PRUint64 mDataLen;
     159                 :   PRUint64 mDataBufferLen;
     160                 : };
     161                 : 
     162                 : class nsDOMBlobBuilder : public nsIDOMMozBlobBuilder
     163               0 : {
     164                 : public:
     165               0 :   nsDOMBlobBuilder()
     166               0 :     : mBlobSet()
     167               0 :   {}
     168                 : 
     169                 :   NS_DECL_ISUPPORTS
     170                 :   NS_DECL_NSIDOMMOZBLOBBUILDER
     171                 : 
     172               0 :   nsresult AppendVoidPtr(const void* aData, PRUint32 aLength)
     173               0 :   { return mBlobSet.AppendVoidPtr(aData, aLength); }
     174                 : 
     175                 :   nsresult GetBlobInternal(const nsAString& aContentType,
     176                 :                            bool aClearBuffer, nsIDOMBlob** aBlob);
     177                 : protected:
     178                 :   BlobSet mBlobSet;
     179                 : };
     180                 : 
     181                 : #endif

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