LCOV - app.info - xpcom/ds/nsObserverList.cpp

LCOV - code coverage report
| Current view: | directory - xpcom/ds - nsObserverList.cpp (source / functions) |  | Found | Hit | Coverage |
| Test: | app.info | Lines: | 62 | 54 | 87.1 %
| Date: | 2012-04-21 | Functions: | 11 | 11 | 100.0 %

           1                 : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
           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.org code.
          16                 :  *
          17                 :  * The Initial Developer of the Original Code is
          18                 :  * Netscape Communications Corporation.
          19                 :  * Portions created by the Initial Developer are Copyright (C) 1998
          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 of the GNU General Public License Version 2 or later (the "GPL"),
          26                 :  * or 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                 : #include "nsObserverList.h"
          39                 :
          40                 : #include "nsAutoPtr.h"
          41                 : #include "nsCOMArray.h"
          42                 : #include "nsISimpleEnumerator.h"
          43                 :
          44                 : nsresult
          45           95492 : nsObserverList::AddObserver(nsIObserver* anObserver, bool ownsWeak)
          46                 : {
          47           95492 :     NS_ASSERTION(anObserver, "Null input");
          48                 :
          49           95492 :     if (!ownsWeak) {
          50           37085 :         ObserverRef* o = mObservers.AppendElement(anObserver);
          51           37085 :         if (!o)
          52               0 :             return NS_ERROR_OUT_OF_MEMORY;
          53                 :
          54           37085 :         return NS_OK;
          55                 :     }
          56                 :
          57          116814 :     nsCOMPtr<nsIWeakReference> weak = do_GetWeakReference(anObserver);
          58           58407 :     if (!weak)
          59               0 :         return NS_NOINTERFACE;
          60                 :
          61           58407 :     ObserverRef *o = mObservers.AppendElement(weak);
          62           58407 :     if (!o)
          63               0 :         return NS_ERROR_OUT_OF_MEMORY;
          64                 :
          65           58407 :     return NS_OK;
          66                 : }
          67                 :
          68                 : nsresult
          69           19527 : nsObserverList::RemoveObserver(nsIObserver* anObserver)
          70                 : {
          71           19527 :     NS_ASSERTION(anObserver, "Null input");
          72                 :
          73           19527 :     if (mObservers.RemoveElement(static_cast<nsISupports*>(anObserver)))
          74           17490 :         return NS_OK;
          75                 :
          76            4074 :     nsCOMPtr<nsIWeakReference> observerRef = do_GetWeakReference(anObserver);
          77            2037 :     if (!observerRef)
          78               0 :         return NS_ERROR_FAILURE;
          79                 :
          80            2037 :     if (!mObservers.RemoveElement(observerRef))
          81               0 :         return NS_ERROR_FAILURE;
          82                 :
          83            2037 :     return NS_OK;
          84                 : }
          85                 :
          86                 : nsresult
          87             972 : nsObserverList::GetObserverList(nsISimpleEnumerator** anEnumerator)
          88                 : {
          89            1944 :     nsRefPtr<nsObserverEnumerator> e(new nsObserverEnumerator(this));
          90             972 :     if (!e)
          91               0 :         return NS_ERROR_OUT_OF_MEMORY;
          92                 :
          93             972 :     NS_ADDREF(*anEnumerator = e);
          94             972 :     return NS_OK;
          95                 : }
          96                 :
          97                 : void
          98           31251 : nsObserverList::FillObserverArray(nsCOMArray<nsIObserver> &aArray)
          99                 : {
         100           31251 :     aArray.SetCapacity(mObservers.Length());
         101                 :
         102           62502 :     nsTArray<ObserverRef> observers(mObservers);
         103                 :
         104           89882 :     for (PRInt32 i = observers.Length() - 1; i >= 0; --i) {
         105           58631 :         if (observers[i].isWeakRef) {
         106           76426 :             nsCOMPtr<nsIObserver> o(do_QueryReferent(observers[i].asWeak()));
         107           38213 :             if (o) {
         108           38202 :                 aArray.AppendObject(o);
         109                 :             }
         110                 :             else {
         111                 :                 // the object has gone away, remove the weakref
         112              11 :                 mObservers.RemoveElement(observers[i].asWeak());
         113                 :             }
         114                 :         }
         115                 :         else {
         116           20418 :             aArray.AppendObject(observers[i].asObserver());
         117                 :         }
         118                 :     }
         119           31251 : }
         120                 :
         121                 : void
         122           30279 : nsObserverList::NotifyObservers(nsISupports *aSubject,
         123                 :                                 const char *aTopic,
         124                 :                                 const PRUnichar *someData)
         125                 : {
         126           60558 :     nsCOMArray<nsIObserver> observers;
         127           30279 :     FillObserverArray(observers);
         128                 :
         129           87939 :     for (PRInt32 i = 0; i < observers.Count(); ++i) {
         130           57660 :         observers[i]->Observe(aSubject, aTopic, someData);
         131                 :     }
         132           30279 : }
         133                 :
         134            7776 : NS_IMPL_ISUPPORTS1(nsObserverEnumerator, nsISimpleEnumerator)
         135                 :
         136             972 : nsObserverEnumerator::nsObserverEnumerator(nsObserverList* aObserverList)
         137             972 :     : mIndex(0)
         138                 : {
         139             972 :     aObserverList->FillObserverArray(mObservers);
         140             972 : }
         141                 :
         142                 : NS_IMETHODIMP
         143            1932 : nsObserverEnumerator::HasMoreElements(bool *aResult)
         144                 : {
         145            1932 :     *aResult = (mIndex < mObservers.Count());
         146            1932 :     return NS_OK;
         147                 : }
         148                 :
         149                 : NS_IMETHODIMP
         150             960 : nsObserverEnumerator::GetNext(nsISupports* *aResult)
         151                 : {
         152             960 :     if (mIndex == mObservers.Count()) {
         153               0 :         NS_ERROR("Enumerating after HasMoreElements returned false.");
         154               0 :         return NS_ERROR_UNEXPECTED;
         155                 :     }
         156                 :
         157             960 :     NS_ADDREF(*aResult = mObservers[mIndex]);
         158             960 :     ++mIndex;
         159             960 :     return NS_OK;
         160                 : }

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