pjs/xpcom/tests/TestObserverService.cpp

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: NPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Netscape 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/NPL/
*
* 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 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 NPL, 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 NPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#define NS_IMPL_IDS
#include "nsISupports.h"
#include "nsIComponentManager.h"
#include "nsIObserverService.h"
#include "nsIObserver.h"
#include "nsIEnumerator.h"
#include "nsString.h"
#include "nsReadableUtils.h"
#include "prprf.h"
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#include <iostream.h>
#include <iomanip.h> // needed for libstdc++-v3
#include "nsWeakReference.h"
static nsIObserverService *anObserverService = NULL;
static void testResult( nsresult rv ) {
if ( NS_SUCCEEDED( rv ) ) {
cout << "...ok" << endl;
} else {
cout << "...failed, rv=0x" << hex << (int)rv << endl;
}
return;
}
extern ostream &operator<<( ostream &s, nsString &str ) {
const char *cstr = ToNewCString(str);
s << cstr;
delete [] (char*)cstr;
return s;
}
class TestObserver : public nsIObserver, public nsSupportsWeakReference {
public:
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TestObserver( const nsString &name = NS_ConvertASCIItoUCS2("unknown") )
: mName( name ) {
NS_INIT_REFCNT();
}
virtual ~TestObserver() {}
NS_DECL_ISUPPORTS
NS_DECL_NSIOBSERVER
nsString mName;
};
NS_IMPL_ISUPPORTS2( TestObserver, nsIObserver, nsISupportsWeakReference );
NS_IMETHODIMP
TestObserver::Observe( nsISupports *aSubject,
const char *aTopic,
const PRUnichar *someData ) {
nsCString topic( aTopic );
nsString data( someData );
/*
The annoying double-cast below is to work around an annoying bug in
the compiler currently used on wensleydale. This is a test.
*/
cout << mName << " has observed something: subject@" << (void*)aSubject
<< " name=" << NS_REINTERPRET_CAST(TestObserver*, NS_REINTERPRET_CAST(void*, aSubject))->mName
<< " aTopic=" << topic.get()
<< " someData=" << data << endl;
return NS_OK;
}
int main(int argc, char *argv[])
{
nsCString topicA; topicA.Assign( "topic-A" );
nsCString topicB; topicB.Assign( "topic-B" );
nsresult rv;
nsresult res = nsComponentManager::CreateInstance("@mozilla.org/observer-service;1",
NULL,
NS_GET_IID(nsIObserverService),
(void **) &anObserverService);
if (res == NS_OK) {
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nsIObserver *aObserver = new TestObserver(NS_ConvertASCIItoUCS2("Observer-A"));
aObserver->AddRef();
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nsIObserver *bObserver = new TestObserver(NS_ConvertASCIItoUCS2("Observer-B"));
bObserver->AddRef();
cout << "Adding Observer-A as observer of topic-A..." << endl;
rv = anObserverService->AddObserver(aObserver, topicA.get(), PR_FALSE);
testResult(rv);
cout << "Adding Observer-B as observer of topic-A..." << endl;
rv = anObserverService->AddObserver(bObserver, topicA.get(), PR_FALSE);
testResult(rv);
cout << "Adding Observer-B as observer of topic-B..." << endl;
rv = anObserverService->AddObserver(bObserver, topicB.get(), PR_FALSE);
testResult(rv);
cout << "Testing Notify(observer-A, topic-A)..." << endl;
rv = anObserverService->NotifyObservers( aObserver,
topicA.get(),
NS_ConvertASCIItoUCS2("Testing Notify(observer-A, topic-A)").get() );
testResult(rv);
cout << "Testing Notify(observer-B, topic-B)..." << endl;
rv = anObserverService->NotifyObservers( bObserver,
topicB.get(),
NS_ConvertASCIItoUCS2("Testing Notify(observer-B, topic-B)").get() );
testResult(rv);
cout << "Testing EnumerateObserverList (for topic-A)..." << endl;
nsCOMPtr<nsISimpleEnumerator> e;
rv = anObserverService->EnumerateObservers(topicA.get(), getter_AddRefs(e));
testResult(rv);
cout << "Enumerating observers of topic-A..." << endl;
if ( e ) {
nsCOMPtr<nsIObserver> observer;
PRBool loop = PR_TRUE;
while( NS_SUCCEEDED(e->HasMoreElements(&loop)) && loop)
{
e->GetNext(getter_AddRefs(observer));
cout << "Calling observe on enumerated observer "
<< NS_REINTERPRET_CAST(TestObserver*, NS_REINTERPRET_CAST(void*, observer.get()))->mName << "..." << endl;
rv = observer->Observe( observer,
topicA.get(),
NS_ConvertASCIItoUCS2("during enumeration").get() );
testResult(rv);
}
}
cout << "...done enumerating observers of topic-A" << endl;
cout << "Removing Observer-A..." << endl;
rv = anObserverService->RemoveObserver(aObserver, topicA.get());
testResult(rv);
cout << "Removing Observer-B (topic-A)..." << endl;
rv = anObserverService->RemoveObserver(bObserver, topicB.get());
testResult(rv);
cout << "Removing Observer-B (topic-B)..." << endl;
rv = anObserverService->RemoveObserver(bObserver, topicA.get());
testResult(rv);
}
return NS_OK;
}