1 files changed, 227 insertions, 0 deletions
diff --git a/src/libs/xpcom18a4/xpcom/ds/nsObserverService.cpp b/src/libs/xpcom18a4/xpcom/ds/nsObserverService.cpp
new file mode 100644
index 00000000..f4c66bcc
--- /dev/null
+++ b/src/libs/xpcom18a4/xpcom/ds/nsObserverService.cpp
@@ -0,0 +1,227 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is mozilla.org code.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 1998
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   Pierre Phaneuf <pp@ludusdesign.com>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either of the GNU General Public License Version 2 or later (the "GPL"),
+ * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#include "prlog.h"
+#include "prlock.h"
+#include "nsIFactory.h"
+#include "nsIServiceManager.h"
+#include "nsIComponentManager.h"
+#include "nsIObserverService.h"
+#include "nsObserverService.h"
+#include "nsObserverList.h"
+#include "nsHashtable.h"
+#include "nsIWeakReference.h"
+
+#define NS_WEAK_OBSERVERS
+
+
+
+#if defined(PR_LOGGING)
+// Log module for nsObserverService logging...
+//
+// To enable logging (see prlog.h for full details):
+//
+//    set NSPR_LOG_MODULES=ObserverService:5
+//    set NSPR_LOG_FILE=nspr.log
+//
+// this enables PR_LOG_DEBUG level information and places all output in
+// the file nspr.log
+PRLogModuleInfo* observerServiceLog = nsnull;
+#endif /* PR_LOGGING */
+
+////////////////////////////////////////////////////////////////////////////////
+// nsObserverService Implementation
+
+
+NS_IMPL_THREADSAFE_ISUPPORTS1(nsObserverService, nsIObserverService)
+
+nsObserverService::nsObserverService()
+    : mObserverTopicTable(nsnull)
+{
+}
+
+nsObserverService::~nsObserverService(void)
+{
+    if(mObserverTopicTable)
+        delete mObserverTopicTable;
+}
+
+NS_METHOD
+nsObserverService::Create(nsISupports* outer, const nsIID& aIID, void* *aInstancePtr)
+{
+#if defined(PR_LOGGING)
+    if (!observerServiceLog)
+        observerServiceLog = PR_NewLogModule("ObserverService");
+#endif
+
+    nsresult rv;
+    nsObserverService* os = new nsObserverService();
+    if (os == nsnull)
+        return NS_ERROR_OUT_OF_MEMORY;
+    NS_ADDREF(os);
+    rv = os->QueryInterface(aIID, aInstancePtr);
+    NS_RELEASE(os);
+    return rv;
+}
+
+static PRBool PR_CALLBACK 
+ReleaseObserverList(nsHashKey *aKey, void *aData, void* closure)
+{
+    nsObserverList* observerList = NS_STATIC_CAST(nsObserverList*, aData);
+    delete(observerList);
+    return PR_TRUE;
+}
+
+nsresult nsObserverService::GetObserverList(const char* aTopic, nsObserverList** anObserverList)
+{
+    if (anObserverList == nsnull)
+        return NS_ERROR_NULL_POINTER;
+	
+    if(mObserverTopicTable == nsnull) 
+    {
+        mObserverTopicTable = new nsObjectHashtable(nsnull, 
+                                                    nsnull,   // should never be cloned
+                                                    ReleaseObserverList, 
+                                                    nsnull,
+                                                    256, 
+                                                    PR_TRUE);
+        if (mObserverTopicTable == nsnull)
+            return NS_ERROR_OUT_OF_MEMORY;
+    }
+	
+
+	nsCStringKey key(aTopic);
+
+    nsObserverList *topicObservers;
+    topicObservers = (nsObserverList *) mObserverTopicTable->Get(&key);
+
+    if (topicObservers) 
+    {
+        *anObserverList = topicObservers;	
+        return NS_OK;
+    }
+
+    topicObservers = new nsObserverList();
+    if (!topicObservers)
+        return NS_ERROR_OUT_OF_MEMORY;
+    
+    *anObserverList = topicObservers;
+    mObserverTopicTable->Put(&key, topicObservers);
+    
+	return NS_OK;
+}
+
+NS_IMETHODIMP nsObserverService::AddObserver(nsIObserver* anObserver, const char* aTopic, PRBool ownsWeak)
+{
+	nsObserverList* anObserverList;
+	nsresult rv;
+
+    if (anObserver == nsnull || aTopic == nsnull)
+        return NS_ERROR_NULL_POINTER;
+
+    rv = GetObserverList(aTopic, &anObserverList);
+    if (NS_FAILED(rv)) return rv;
+
+    return anObserverList->AddObserver(anObserver, ownsWeak);
+}
+
+NS_IMETHODIMP nsObserverService::RemoveObserver(nsIObserver* anObserver, const char* aTopic)
+{
+	nsObserverList* anObserverList;
+	nsresult rv;
+
+    if (anObserver == nsnull || aTopic == nsnull)
+        return NS_ERROR_NULL_POINTER;
+
+    rv = GetObserverList(aTopic, &anObserverList);
+    if (NS_FAILED(rv)) return rv;
+
+    return anObserverList->RemoveObserver(anObserver);
+}
+
+NS_IMETHODIMP nsObserverService::EnumerateObservers(const char* aTopic, nsISimpleEnumerator** anEnumerator)
+{
+	nsObserverList* anObserverList;
+	nsresult rv;
+
+    if (anEnumerator == nsnull || aTopic == nsnull)
+        return NS_ERROR_NULL_POINTER;
+
+    rv = GetObserverList(aTopic, &anObserverList);
+    if (NS_FAILED(rv)) return rv;
+
+    return anObserverList->GetObserverList(anEnumerator);
+}
+
+// Enumerate observers of aTopic and call Observe on each.
+NS_IMETHODIMP nsObserverService::NotifyObservers( nsISupports *aSubject,
+                                                  const char *aTopic,
+                                                  const PRUnichar *someData ) {
+    nsresult rv = NS_OK;
+    nsCOMPtr<nsISimpleEnumerator> observers;
+    nsCOMPtr<nsISupports> observerRef;
+
+    rv = EnumerateObservers( aTopic, getter_AddRefs(observers) );
+    if ( NS_FAILED( rv ) )
+        return rv;
+    PRBool loop = PR_TRUE;
+    while( NS_SUCCEEDED(observers->HasMoreElements(&loop)) && loop) 
+    {
+        observers->GetNext(getter_AddRefs(observerRef));
+        nsCOMPtr<nsIObserver> observer = do_QueryInterface(observerRef);
+        if ( observer ) 
+            observer->Observe( aSubject, aTopic, someData );
+#ifdef NS_WEAK_OBSERVERS
+        else
+        {  // check for weak reference.
+             nsCOMPtr<nsIWeakReference> weakRef = do_QueryInterface(observerRef);     
+             if ( weakRef )                                                              
+                weakRef->QueryReferent(NS_GET_IID(nsIObserver), getter_AddRefs(observer));
+
+             if ( observer ) 
+                observer->Observe( aSubject, aTopic, someData );
+
+             PR_LOG(observerServiceLog, PR_LOG_DEBUG, ("Notification - %s\n", aTopic ? aTopic : "undefined"));
+
+        }
+#endif
+    }
+    return NS_OK;
+}
+////////////////////////////////////////////////////////////////////////////////
+