LCOV - code coverage report
Current view: directory - content/xtf/src - nsXTFWeakTearoff.cpp (source / functions) Found Hit Coverage
Test: app.info Lines: 44 36 81.8 %
Date: 2012-06-02 Functions: 7 6 85.7 %

       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 the Mozilla XTF project.
      16                 :  *
      17                 :  * The Initial Developer of the Original Code is
      18                 :  * Alex Fritze.
      19                 :  * Portions created by the Initial Developer are Copyright (C) 2004
      20                 :  * the Initial Developer. All Rights Reserved.
      21                 :  *
      22                 :  * Contributor(s):
      23                 :  *   Alex Fritze <alex@croczilla.com> (original author)
      24                 :  *
      25                 :  * Alternatively, the contents of this file may be used under the terms of
      26                 :  * either the GNU General Public License Version 2 or later (the "GPL"), or
      27                 :  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
      28                 :  * in which case the provisions of the GPL or the LGPL are applicable instead
      29                 :  * of those above. If you wish to allow use of your version of this file only
      30                 :  * under the terms of either the GPL or the LGPL, and not to allow others to
      31                 :  * use your version of this file under the terms of the MPL, indicate your
      32                 :  * decision by deleting the provisions above and replace them with the notice
      33                 :  * and other provisions required by the GPL or the LGPL. If you do not delete
      34                 :  * the provisions above, a recipient may use your version of this file under
      35                 :  * the terms of any one of the MPL, the GPL or the LGPL.
      36                 :  *
      37                 :  * ***** END LICENSE BLOCK ***** */
      38                 : 
      39                 : #include "nsCOMPtr.h"
      40                 : #include "nsXPTCUtils.h"
      41                 : #include "nsIInterfaceInfo.h"
      42                 : #include "nsIInterfaceInfoManager.h"
      43                 : #include "nsServiceManagerUtils.h"
      44                 : #include "nsAutoPtr.h"
      45                 : #ifdef DEBUG
      46                 : #include <stdio.h>
      47                 : #endif
      48                 : 
      49                 : ////////////////////////////////////////////////////////////////////////
      50                 : // nsXTFWeakTearoff class
      51                 : 
      52                 : class nsXTFWeakTearoff : protected nsAutoXPTCStub
      53                 : {
      54                 : protected:
      55                 :   ~nsXTFWeakTearoff();
      56                 :   
      57                 : public:
      58                 :   nsXTFWeakTearoff(const nsIID& iid,
      59                 :                    nsISupports* obj,
      60                 :                    nsresult *rv);
      61                 : 
      62                 :   // nsISupports interface
      63                 :   NS_DECL_ISUPPORTS
      64                 :   
      65                 :   NS_IMETHOD CallMethod(PRUint16 methodIndex,
      66                 :                         const XPTMethodDescriptor* info,
      67                 :                         nsXPTCMiniVariant* params);
      68                 : 
      69                 : private:
      70                 :   nsISupports *mObj;
      71                 :   nsIID mIID;
      72                 : };
      73                 : 
      74                 : //----------------------------------------------------------------------
      75                 : // implementation:
      76                 : 
      77               2 : nsXTFWeakTearoff::nsXTFWeakTearoff(const nsIID& iid,
      78                 :                                    nsISupports* obj,
      79                 :                                    nsresult *rv)
      80               2 :   : mObj(obj), mIID(iid)
      81                 : {
      82               2 :   MOZ_COUNT_CTOR(nsXTFWeakTearoff);
      83                 : 
      84               2 :   *rv = InitStub(iid);
      85               2 : }
      86                 : 
      87               0 : nsXTFWeakTearoff::~nsXTFWeakTearoff()
      88                 : {
      89               0 :   MOZ_COUNT_DTOR(nsXTFWeakTearoff);
      90               0 : }
      91                 : 
      92                 : nsresult
      93               2 : NS_NewXTFWeakTearoff(const nsIID& iid,
      94                 :                      nsISupports* obj,
      95                 :                      nsISupports** aResult){
      96               2 :   NS_PRECONDITION(aResult != nsnull, "null ptr");
      97               2 :   if (!aResult)
      98               0 :     return NS_ERROR_NULL_POINTER;
      99                 : 
     100                 :   nsresult rv;
     101                 : 
     102                 :   nsRefPtr<nsXTFWeakTearoff> result =
     103               4 :     new nsXTFWeakTearoff(iid, obj, &rv);
     104               2 :   if (!result)
     105               0 :     return NS_ERROR_OUT_OF_MEMORY;
     106                 : 
     107               2 :   if (NS_FAILED(rv))
     108               0 :     return rv;
     109                 : 
     110               2 :   return result->QueryInterface(iid, (void**) aResult);
     111                 : }
     112                 : 
     113                 : //----------------------------------------------------------------------
     114                 : // nsISupports implementation
     115                 : 
     116               8 : NS_IMPL_ADDREF(nsXTFWeakTearoff)
     117               6 : NS_IMPL_RELEASE(nsXTFWeakTearoff)
     118                 : 
     119                 : NS_IMETHODIMP
     120              16 : nsXTFWeakTearoff::QueryInterface(REFNSIID aIID, void** aInstancePtr)
     121                 : {
     122              16 :   NS_PRECONDITION(aInstancePtr, "null out param");
     123                 : 
     124              16 :   if (aIID.Equals(mIID) || aIID.Equals(NS_GET_IID(nsISupports))) {
     125               4 :     *aInstancePtr = mXPTCStub;
     126               4 :     NS_ADDREF_THIS();
     127               4 :     return NS_OK;
     128                 :   }
     129                 :   // we can't map QI onto the obj, because the xpcom wrapper otherwise
     130                 :   // QI-accumulates all interfaces defined on mObj
     131                 :   //  else return mObj->QueryInterface(aIID, aInstancePtr); 
     132              12 :   *aInstancePtr = nsnull;
     133              12 :   return NS_ERROR_NO_INTERFACE;
     134                 : }
     135                 : 
     136                 : NS_IMETHODIMP
     137               2 : nsXTFWeakTearoff::CallMethod(PRUint16 methodIndex,
     138                 :                              const XPTMethodDescriptor* info,
     139                 :                              nsXPTCMiniVariant* params)
     140                 : {
     141               2 :   NS_ASSERTION(methodIndex >= 3,
     142                 :                "huh? indirect nsISupports method call unexpected");
     143                 : 
     144                 :   // prepare args:
     145               2 :   int paramCount = info->num_args;
     146                 :   nsXPTCVariant* fullPars;
     147               2 :   if (!paramCount) {
     148               0 :     fullPars = nsnull;
     149                 :   }
     150                 :   else {
     151               4 :     fullPars = new nsXPTCVariant[paramCount];
     152               2 :     if (!fullPars)
     153               0 :       return NS_ERROR_OUT_OF_MEMORY;
     154                 :   }
     155                 : 
     156               4 :   for (int i=0; i<paramCount; ++i) {
     157               2 :     const nsXPTParamInfo& paramInfo = info->params[i];
     158               2 :     uint8 flags = paramInfo.IsOut() ? nsXPTCVariant::PTR_IS_DATA : 0;
     159               2 :     fullPars[i].Init(params[i], paramInfo.GetType(), flags);
     160                 :   }
     161                 :   
     162                 :   // make the call:
     163               2 :   nsresult rv = NS_InvokeByIndex(mObj, methodIndex, paramCount, fullPars);
     164               2 :   if (fullPars)
     165               2 :     delete []fullPars;
     166               2 :   return rv;
     167                 : }

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