mirror of
https://github.com/mozilla/gecko-dev.git
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311 lines
9.0 KiB
C++
311 lines
9.0 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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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.org code.
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*
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* The Initial Developer of the Original Code is Netscape
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* Communications 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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* Pierre Phaneuf <pp@ludusdesign.com>
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*/
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// DO NOT COPY THIS CODE INTO YOUR SOURCE! USE NS_IMPL_NSGETMODULE()
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#include "nsGenericFactory.h"
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#include "nsCRT.h"
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nsGenericFactory::nsGenericFactory(ConstructorProcPtr constructor)
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: mConstructor(constructor), mDestructor(NULL)
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{
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NS_INIT_ISUPPORTS();
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}
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nsGenericFactory::~nsGenericFactory()
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{
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if (mDestructor != NULL)
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(*mDestructor) ();
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}
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NS_IMPL_THREADSAFE_ISUPPORTS2(nsGenericFactory,
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nsIGenericFactory,
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nsIFactory)
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NS_IMETHODIMP nsGenericFactory::CreateInstance(nsISupports *aOuter, REFNSIID aIID, void **aResult)
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{
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return mConstructor(aOuter, aIID, aResult);
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}
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NS_IMETHODIMP nsGenericFactory::LockFactory(PRBool aLock)
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{
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return NS_OK;
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}
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NS_IMETHODIMP nsGenericFactory::SetConstructor(ConstructorProcPtr constructor)
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{
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mConstructor = constructor;
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return NS_OK;
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}
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NS_IMETHODIMP nsGenericFactory::SetDestructor(DestructorProcPtr destructor)
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{
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mDestructor = destructor;
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return NS_OK;
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}
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NS_METHOD nsGenericFactory::Create(nsISupports* outer, const nsIID& aIID, void* *aInstancePtr)
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{
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// sorry, aggregation not spoken here.
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nsresult res = NS_ERROR_NO_AGGREGATION;
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if (outer == NULL) {
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nsGenericFactory* factory = new nsGenericFactory;
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if (factory != NULL) {
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res = factory->QueryInterface(aIID, aInstancePtr);
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if (res != NS_OK)
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delete factory;
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} else {
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res = NS_ERROR_OUT_OF_MEMORY;
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}
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}
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return res;
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}
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NS_COM nsresult
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NS_NewGenericFactory(nsIGenericFactory* *result,
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nsIGenericFactory::ConstructorProcPtr constructor,
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nsIGenericFactory::DestructorProcPtr destructor)
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{
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nsresult rv;
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nsIGenericFactory* fact;
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rv = nsGenericFactory::Create(NULL, NS_GET_IID(nsIGenericFactory), (void**)&fact);
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if (NS_FAILED(rv)) return rv;
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rv = fact->SetConstructor(constructor);
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if (NS_FAILED(rv)) goto error;
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rv = fact->SetDestructor(destructor);
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if (NS_FAILED(rv)) goto error;
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*result = fact;
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return rv;
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error:
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NS_RELEASE(fact);
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return rv;
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}
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////////////////////////////////////////////////////////////////////////////////
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nsGenericModule::nsGenericModule(const char* moduleName, PRUint32 componentCount,
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nsModuleComponentInfo* components,
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nsModuleDestructorProc dtor)
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: mInitialized(PR_FALSE),
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mModuleName(moduleName),
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mComponentCount(componentCount),
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mComponents(components),
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mFactories(32, PR_FALSE),
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mDtor(dtor)
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{
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NS_INIT_ISUPPORTS();
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}
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nsGenericModule::~nsGenericModule()
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{
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Shutdown();
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}
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NS_IMPL_THREADSAFE_ISUPPORTS1(nsGenericModule, nsIModule)
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// Perform our one-time intialization for this module
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nsresult
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nsGenericModule::Initialize()
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{
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if (mInitialized) {
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return NS_OK;
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}
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mInitialized = PR_TRUE;
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return NS_OK;
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}
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// Shutdown this module, releasing all of the module resources
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void
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nsGenericModule::Shutdown()
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{
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if (mDtor)
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mDtor(this);
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// Release the factory objects
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mFactories.Reset();
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}
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// Create a factory object for creating instances of aClass.
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NS_IMETHODIMP
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nsGenericModule::GetClassObject(nsIComponentManager *aCompMgr,
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const nsCID& aClass,
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const nsIID& aIID,
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void** r_classObj)
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{
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nsresult rv;
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// Defensive programming: Initialize *r_classObj in case of error below
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if (!r_classObj) {
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return NS_ERROR_INVALID_POINTER;
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}
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*r_classObj = NULL;
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// Do one-time-only initialization if necessary
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if (!mInitialized) {
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rv = Initialize();
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if (NS_FAILED(rv)) {
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// Initialization failed! yikes!
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return rv;
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}
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}
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// Choose the appropriate factory, based on the desired instance
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// class type (aClass).
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nsIDKey key(aClass);
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nsCOMPtr<nsIGenericFactory> fact = getter_AddRefs(NS_REINTERPRET_CAST(nsIGenericFactory *, mFactories.Get(&key)));
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if (fact == nsnull) {
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nsModuleComponentInfo* desc = mComponents;
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for (PRUint32 i = 0; i < mComponentCount; i++) {
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if (desc->mCID.Equals(aClass)) {
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rv = NS_NewGenericFactory(getter_AddRefs(fact), desc->mConstructor);
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if (NS_FAILED(rv)) return rv;
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(void)mFactories.Put(&key, fact);
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goto found;
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}
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desc++;
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}
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// not found in descriptions
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#ifdef DEBUG
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char* cs = aClass.ToString();
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printf("+++ nsGenericModule %s: unable to create factory for %s\n", mModuleName, cs);
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nsCRT::free(cs);
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#endif
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// XXX put in stop-gap so that we don't search for this one again
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return NS_ERROR_FACTORY_NOT_REGISTERED;
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}
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found:
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rv = fact->QueryInterface(aIID, r_classObj);
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return rv;
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}
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NS_IMETHODIMP
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nsGenericModule::RegisterSelf(nsIComponentManager *aCompMgr,
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nsIFile* aPath,
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const char* registryLocation,
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const char* componentType)
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{
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nsresult rv = NS_OK;
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#ifdef DEBUG
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printf("*** Registering %s components (all right -- a generic module!)\n", mModuleName);
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#endif
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nsModuleComponentInfo* cp = mComponents;
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for (PRUint32 i = 0; i < mComponentCount; i++) {
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rv = aCompMgr->RegisterComponentSpec(cp->mCID, cp->mDescription,
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cp->mProgID, aPath, PR_TRUE,
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PR_TRUE);
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if (NS_FAILED(rv)) {
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#ifdef DEBUG
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printf("nsGenericModule %s: unable to register %s component => %x\n",
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mModuleName?mModuleName:"(null)", cp->mDescription?cp->mDescription:"(null)", rv);
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#endif
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break;
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}
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// Call the registration hook of the component, if any
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if (cp->mRegisterSelfProc)
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{
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rv = cp->mRegisterSelfProc(aCompMgr, aPath, registryLocation, componentType);
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if (NS_FAILED(rv)) {
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#ifdef DEBUG
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printf("nsGenericModule %s: Register hook for %s component returned error => %x\n",
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mModuleName?mModuleName:"(null)", cp->mDescription?cp->mDescription:"(null)", rv);
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#endif
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break;
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}
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}
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cp++;
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}
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return rv;
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}
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NS_IMETHODIMP
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nsGenericModule::UnregisterSelf(nsIComponentManager* aCompMgr,
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nsIFile* aPath,
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const char* registryLocation)
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{
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#ifdef DEBUG
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printf("*** Unregistering %s components (all right -- a generic module!)\n", mModuleName);
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#endif
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nsModuleComponentInfo* cp = mComponents;
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for (PRUint32 i = 0; i < mComponentCount; i++) {
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// Call the unregistration hook of the component, if any
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if (cp->mUnregisterSelfProc)
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{
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cp->mUnregisterSelfProc(aCompMgr, aPath, registryLocation);
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}
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// Unregister the component
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nsresult rv = aCompMgr->UnregisterComponentSpec(cp->mCID, aPath);
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if (NS_FAILED(rv)) {
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#ifdef DEBUG
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printf("nsGenericModule %s: unable to unregister %s component => %x\n",
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mModuleName, cp->mDescription, rv);
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#endif
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}
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cp++;
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}
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return NS_OK;
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}
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NS_IMETHODIMP
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nsGenericModule::CanUnload(nsIComponentManager *aCompMgr, PRBool *okToUnload)
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{
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if (!okToUnload) {
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return NS_ERROR_INVALID_POINTER;
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}
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*okToUnload = PR_FALSE;
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return NS_ERROR_FAILURE;
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}
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NS_COM nsresult
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NS_NewGenericModule(const char* moduleName,
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PRUint32 componentCount,
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nsModuleComponentInfo* components,
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nsModuleDestructorProc dtor,
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nsIModule* *result)
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{
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nsresult rv = NS_OK;
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NS_ASSERTION(result, "Null argument");
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// Create and initialize the module instance
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nsGenericModule *m =
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new nsGenericModule(moduleName, componentCount, components, dtor);
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if (!m) {
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return NS_ERROR_OUT_OF_MEMORY;
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}
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// Increase refcnt and store away nsIModule interface to m in return_cobj
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rv = m->QueryInterface(NS_GET_IID(nsIModule), (void**)result);
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if (NS_FAILED(rv)) {
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delete m;
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m = nsnull;
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}
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return rv;
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}
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////////////////////////////////////////////////////////////////////////////////
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