RetroZilla/embedding/base/nsEmbedAPI.cpp

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2015-10-21 05:03:22 +02:00
/* -*- 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 the Mozilla browser.
*
* The Initial Developer of the Original Code is
* Netscape Communications, Inc.
* Portions created by the Initial Developer are Copyright (C) 1999
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* 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 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 "nsIServiceManager.h"
#include "nsIComponentManager.h"
#include "nsIComponentRegistrar.h"
#include "nsIAppStartupNotifier.h"
#include "nsIStringBundle.h"
#include "nsIDirectoryService.h"
#include "nsDirectoryServiceDefs.h"
#include "nsXPCOM.h"
#include "nsEmbedAPI.h"
static nsIServiceManager *sServiceManager = nsnull;
static PRBool sRegistryInitializedFlag = PR_FALSE;
static PRUint32 sInitCounter = 0;
#define HACK_AROUND_THREADING_ISSUES
//#define HACK_AROUND_NONREENTRANT_INITXPCOM
#ifdef HACK_AROUND_NONREENTRANT_INITXPCOM
// XXX hack class to clean up XPCOM when this module is unloaded
class XPCOMCleanupHack
{
public:
PRBool mCleanOnExit;
XPCOMCleanupHack() : mCleanOnExit(PR_FALSE) {}
~XPCOMCleanupHack()
{
if (mCleanOnExit)
{
if (sInitCounter > 0)
{
sInitCounter = 1;
NS_TermEmbedding();
}
// XXX Global destructors and NS_ShutdownXPCOM don't seem to mix
// NS_ShutdownXPCOM(sServiceManager);
}
}
};
static PRBool sXPCOMInitializedFlag = PR_FALSE;
static XPCOMCleanupHack sXPCOMCleanupHack;
#endif
NS_METHOD
NS_InitEmbedding(nsILocalFile *mozBinDirectory,
nsIDirectoryServiceProvider *appFileLocProvider,
nsStaticModuleInfo const *aStaticComponents,
PRUint32 aStaticComponentCount)
{
nsresult rv;
// Reentrant calls to this method do nothing except increment a counter
sInitCounter++;
if (sInitCounter > 1)
return NS_OK;
// Initialise XPCOM
#ifdef HACK_AROUND_NONREENTRANT_INITXPCOM
// Can't call NS_InitXPCom more than once or things go boom!
if (!sXPCOMInitializedFlag)
#endif
{
// Initialise XPCOM
rv = NS_InitXPCOM3(&sServiceManager, mozBinDirectory, appFileLocProvider,
aStaticComponents, aStaticComponentCount);
NS_ENSURE_SUCCESS(rv, rv);
#ifdef HACK_AROUND_NONREENTRANT_INITXPCOM
sXPCOMInitializedFlag = PR_TRUE;
sXPCOMCleanupHack.mCleanOnExit = PR_TRUE;
#endif
}
// Register components
if (!sRegistryInitializedFlag)
{
#ifdef DEBUG
nsIComponentRegistrar *registrar;
rv = sServiceManager->QueryInterface(NS_GET_IID(nsIComponentRegistrar),
(void **) &registrar);
if (NS_FAILED(rv))
{
NS_WARNING("Could not QI to registrar");
return rv;
}
rv = registrar->AutoRegister(nsnull);
if (NS_FAILED(rv))
{
NS_WARNING("Could not AutoRegister");
}
else
{
// If the application is using an GRE, then, auto register components
// in the GRE directory as well.
//
// The application indicates that it's using an GRE by returning a
// valid nsIFile when queried (via appFileLocProvider) for the
// NS_GRE_DIR atom as shown below
if (appFileLocProvider)
{
nsIFile *greDir = nsnull;
PRBool persistent = PR_TRUE;
appFileLocProvider->GetFile(NS_GRE_DIR, &persistent,
&greDir);
if (greDir)
{
rv = registrar->AutoRegister(greDir);
if (NS_FAILED(rv))
NS_WARNING("Could not AutoRegister GRE components");
NS_RELEASE(greDir);
}
}
}
NS_RELEASE(registrar);
if (NS_FAILED(rv))
return rv;
#endif
sRegistryInitializedFlag = PR_TRUE;
}
nsIComponentManager *compMgr;
rv = sServiceManager->QueryInterface(NS_GET_IID(nsIComponentManager),
(void **) &compMgr);
if (NS_FAILED(rv))
return rv;
nsIObserver *startupNotifier;
rv = compMgr->CreateInstanceByContractID(NS_APPSTARTUPNOTIFIER_CONTRACTID,
NULL,
NS_GET_IID(nsIObserver),
(void **) &startupNotifier);
NS_RELEASE(compMgr);
if (NS_FAILED(rv))
return rv;
startupNotifier->Observe(nsnull, APPSTARTUP_TOPIC, nsnull);
NS_RELEASE(startupNotifier);
#ifdef HACK_AROUND_THREADING_ISSUES
// XXX force certain objects to be created on the main thread
nsIStringBundleService *bundleService;
rv = sServiceManager->GetServiceByContractID(NS_STRINGBUNDLE_CONTRACTID,
NS_GET_IID(nsIStringBundleService),
(void **) &bundleService);
if (NS_SUCCEEDED(rv))
{
nsIStringBundle *stringBundle;
const char propertyURL[] = "chrome://necko/locale/necko.properties";
rv = bundleService->CreateBundle(propertyURL, &stringBundle);
NS_RELEASE(stringBundle);
NS_RELEASE(bundleService);
}
#endif
return NS_OK;
}
NS_METHOD
NS_TermEmbedding()
{
// Reentrant calls to this method do nothing except decrement a counter
if (sInitCounter > 1)
{
sInitCounter--;
return NS_OK;
}
sInitCounter = 0;
NS_IF_RELEASE(sServiceManager);
// Terminate XPCOM & cleanup
#ifndef HACK_AROUND_NONREENTRANT_INITXPCOM
nsresult rv = NS_ShutdownXPCOM(sServiceManager);
NS_ENSURE_SUCCESS(rv, rv);
#endif
return NS_OK;
}