2000-06-09 04:11:45 +04:00
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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Netscape Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code is Mozilla Communicator client code.
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*
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* The Initial Developer of the Original Code is Netscape Communications
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* Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All
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* Rights Reserved.
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*
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* Contributor(s):
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* Simon Fraser <sfraser@netscape.com>
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*/
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#include "nsCOMPtr.h"
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#include "nsError.h"
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#include "nsIObserverService.h"
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#include "nsIServiceManager.h"
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2000-08-23 21:27:06 +04:00
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#include "nsString.h"
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2000-06-09 04:11:45 +04:00
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#include "nsAEUtils.h"
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#include "nsAESpyglassSuiteHandler.h"
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#include "nsDocLoadObserver.h"
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nsDocLoadObserver::nsDocLoadObserver()
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: mRegistered(PR_FALSE)
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{
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NS_INIT_ISUPPORTS();
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}
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nsDocLoadObserver::~nsDocLoadObserver()
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{
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}
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NS_IMPL_ISUPPORTS1(nsDocLoadObserver, nsIObserver)
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void nsDocLoadObserver::Register()
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{
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if (!mRegistered)
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{
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nsresult rv;
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nsCOMPtr<nsIObserverService> anObserverService = do_GetService(NS_OBSERVERSERVICE_PROGID, &rv);
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if (NS_SUCCEEDED(rv))
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{
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if (NS_SUCCEEDED(anObserverService->AddObserver(this,
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NS_ConvertASCIItoUCS2("EndDocumentLoad").GetUnicode())))
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{
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mRegistered = PR_TRUE;
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}
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}
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}
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}
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void nsDocLoadObserver::Unregister()
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{
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if (mRegistered)
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{
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nsresult rv;
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nsCOMPtr<nsIObserverService> anObserverService = do_GetService(NS_OBSERVERSERVICE_PROGID, &rv);
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if (NS_SUCCEEDED(rv))
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{
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if (NS_SUCCEEDED(anObserverService->RemoveObserver(this,
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NS_ConvertASCIItoUCS2("EndDocumentLoad").GetUnicode())))
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{
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mRegistered = PR_FALSE;
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}
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}
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}
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}
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void nsDocLoadObserver::AddEchoRequester(OSType appSignature)
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{
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2000-07-28 04:21:06 +04:00
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// make sure an application is only in the list once
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mEchoRequesters.RemoveElement((void*)appSignature);
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2000-06-09 04:11:45 +04:00
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mEchoRequesters.AppendElement((void*)appSignature);
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Register(); // ensure we are registered
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}
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void nsDocLoadObserver::RemoveEchoRequester(OSType appSignature)
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{
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mEchoRequesters.RemoveElement((void*)appSignature);
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if (mEchoRequesters.Count() == 0)
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Unregister();
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}
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NS_IMETHODIMP nsDocLoadObserver::Observe(nsISupports* /*aSubject*/,
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const PRUnichar* /*aTopic*/, const PRUnichar* someData)
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{
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// we need a URL to forward
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if (!someData)
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return NS_ERROR_NULL_POINTER;
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// are there any echo requesters to notify?
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if (mEchoRequesters.Count() == 0)
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return NS_OK;
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// create the descriptor for identifying this application
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StAEDesc from;
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const OSType mozz = 'MOZZ';
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if (noErr != ::AECreateDesc(typeType, &mozz, sizeof(mozz), &from))
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return NS_ERROR_UNEXPECTED;
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// create the descriptor for the URL
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nsString urlText(someData);
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char* urlString = urlText.ToNewCString();
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StAEDesc url;
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OSErr err = ::AECreateDesc(typeChar, urlString, urlText.Length(), &url);
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nsMemory::Free(urlString);
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if (err != noErr)
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return NS_ERROR_UNEXPECTED;
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// keep track of any invalid requesters and remove them when we're done
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nsVoidArray requestersToRemove;
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PRInt32 numRequesters = mEchoRequesters.Count();
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// now notify all the echo requesters
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for (PRInt32 i = 0; i < numRequesters; i ++)
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{
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// specify the address of the requester
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StAEDesc targetAddress;
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const OSType target = (OSType)mEchoRequesters.ElementAt(i);
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if (noErr != ::AECreateDesc(typeApplSignature, &target, sizeof(target), &targetAddress))
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return NS_ERROR_UNEXPECTED;
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// create the event
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AppleEvent sendEvent;
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err = ::AECreateAppleEvent(AESpyglassSuiteHandler::kSpyglassSendSignature,
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AESpyglassSuiteHandler::kSendURLEchoEvent,
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&targetAddress, kAutoGenerateReturnID, kAnyTransactionID, &sendEvent);
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if (noErr != err)
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{ // this target is no longer available
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requestersToRemove.AppendElement((void *)target);
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continue;
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}
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// attach our signature - to let the requester know who we are
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err = ::AEPutParamDesc(&sendEvent, keyOriginalAddressAttr, &from);
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NS_ASSERTION(noErr == err, "AEPutParamDesc");
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// attach the new URL
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err = ::AEPutParamDesc(&sendEvent, keyDirectObject, &url);
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NS_ASSERTION(noErr == err, "AEPutParamDesc");
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// send it
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AppleEvent reply;
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err = ::AESend(&sendEvent, &reply, kAENoReply, kAENormalPriority, 180, NULL, NULL);
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NS_ASSERTION(noErr == err, "AESend");
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::AEDisposeDesc(&sendEvent);
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}
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// now remove unresponsive requestors
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for (PRInt32 i = 0; i < requestersToRemove.Count(); i ++)
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{
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OSType thisRequester = (OSType)requestersToRemove.ElementAt(i);
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mEchoRequesters.RemoveElement((void *)thisRequester);
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}
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return NS_OK;
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}
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