/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- * * The contents of this file are subject to the Netscape Public License * Version 1.0 (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 Communicator client code. * * The Initial Developer of the Original Code is Netscape Communications * Corporation. Portions created by Netscape are Copyright (C) 1998 * Netscape Communications Corporation. All Rights Reserved. */ #ifdef XP_MAC #include "nsIDocumentLoader.h" #define NS_IMPL_IDS #else #define NS_IMPL_IDS #include "nsIDocumentLoader.h" #endif #include "prmem.h" #include "plstr.h" #include "nsString.h" #include "nsISupportsArray.h" #include "nsIURL.h" #include "nsIStreamListener.h" #include "nsIPostToServer.h" #include "nsIFactory.h" #include "nsIContentViewerContainer.h" #include "nsIRefreshUrl.h" #include "nsITimer.h" #include "nsIDocumentLoaderObserver.h" #include "nsVoidArray.h" #include "nsIHttpURL.h" #include "nsILoadAttribs.h" #include "nsIURLGroup.h" #include "nsIServiceManager.h" #include "nsINetService.h" #include "nsXPComFactory.h" // XXX: Only needed for dummy factory... #include "nsIDocument.h" #include "nsIDocumentViewer.h" #include "nsICSSParser.h" #include "nsICSSStyleSheet.h" #include "nsLayoutCID.h" #include "nsRDFCID.h" /* Forward declarations.... */ class nsDocLoaderImpl; #ifdef DEBUG #undef NOISY_CREATE_DOC #else #undef NOISY_CREATE_DOC #endif #if defined(DEBUG) || defined(FORCE_PR_LOG) PRLogModuleInfo* gDocLoaderLog = nsnull; #endif /* DEBUG || FORCE_PR_LOG */ /* Private IIDs... */ /* eb001fa0-214f-11d2-bec0-00805f8a66dc */ #define NS_DOCUMENTBINDINFO_IID \ { 0xeb001fa0, 0x214f, 0x11d2, \ {0xbe, 0xc0, 0x00, 0x80, 0x5f, 0x8a, 0x66, 0xdc} } /* Define IIDs... */ NS_DEFINE_IID(kIStreamObserverIID, NS_ISTREAMOBSERVER_IID); NS_DEFINE_IID(kIDocumentLoaderIID, NS_IDOCUMENTLOADER_IID); NS_DEFINE_IID(kIDocumentLoaderFactoryIID, NS_IDOCUMENTLOADERFACTORY_IID); NS_DEFINE_IID(kDocumentBindInfoIID, NS_DOCUMENTBINDINFO_IID); NS_DEFINE_IID(kIURLGroupIID, NS_IURLGROUP_IID); NS_DEFINE_IID(kRefreshURLIID, NS_IREFRESHURL_IID); NS_DEFINE_IID(kHTTPURLIID, NS_IHTTPURL_IID); NS_DEFINE_IID(kISupportsIID, NS_ISUPPORTS_IID); NS_DEFINE_IID(kIDocumentIID, NS_IDOCUMENT_IID); NS_DEFINE_IID(kIStreamListenerIID, NS_ISTREAMLISTENER_IID); NS_DEFINE_IID(kINetServiceIID, NS_INETSERVICE_IID); /* Define CIDs... */ NS_DEFINE_IID(kCHTMLDocumentCID, NS_HTMLDOCUMENT_CID); NS_DEFINE_IID(kCXMLDocumentCID, NS_XMLDOCUMENT_CID); NS_DEFINE_IID(kCRDFHTMLBuilderCID, NS_RDFHTMLBUILDER_CID); NS_DEFINE_IID(kCXULDocumentCID, NS_XULDOCUMENT_CID); NS_DEFINE_IID(kCImageDocumentCID, NS_IMAGEDOCUMENT_CID); NS_DEFINE_IID(kNetServiceCID, NS_NETSERVICE_CID); /* * The nsDocumentBindInfo contains the state required when a single document * is being loaded... Each instance remains alive until its target URL has * been loaded (or aborted). * * The Document Loader maintains a list of nsDocumentBindInfo instances which * represents the set of documents actively being loaded... */ class nsDocumentBindInfo : public nsIStreamListener, public nsIRefreshUrl { public: nsDocumentBindInfo(); nsresult Init(nsDocLoaderImpl* aDocLoader, const char *aCommand, nsIContentViewerContainer* aContainer, nsISupports* aExtraInfo, nsIStreamObserver* anObserver); NS_DECL_ISUPPORTS nsresult Bind(const nsString& aURLSpec, nsIPostData* aPostData, nsIStreamListener* aListener); nsresult Bind(nsIURL* aURL, nsIStreamListener* aListener); nsresult Stop(void); /* nsIStreamListener interface methods... */ NS_IMETHOD GetBindInfo(nsIURL* aURL, nsStreamBindingInfo* aInfo); NS_IMETHOD OnProgress(nsIURL* aURL, PRUint32 aProgress, PRUint32 aProgressMax); NS_IMETHOD OnStatus(nsIURL* aURL, const PRUnichar* aMsg); NS_IMETHOD OnStartBinding(nsIURL* aURL, const char *aContentType); NS_IMETHOD OnDataAvailable(nsIURL* aURL, nsIInputStream *aStream, PRUint32 aLength); NS_IMETHOD OnStopBinding(nsIURL* aURL, nsresult aStatus, const PRUnichar* aMsg); nsresult GetStatus(void) { return mStatus; } /* nsIRefreshURL interface methods... */ NS_IMETHOD RefreshURL(nsIURL* aURL, PRInt32 millis, PRBool repeat); NS_IMETHOD CancelRefreshURLTimers(void); protected: virtual ~nsDocumentBindInfo(); protected: char* m_Command; nsIURL* m_Url; nsIContentViewerContainer* m_Container; nsISupports* m_ExtraInfo; nsIStreamObserver* m_Observer; nsIStreamListener* m_NextStream; nsDocLoaderImpl* m_DocLoader; nsresult mStatus; }; /**************************************************************************** * nsDocFactoryImpl implementation... ****************************************************************************/ class nsDocFactoryImpl : public nsIDocumentLoaderFactory { public: nsDocFactoryImpl(); NS_DECL_ISUPPORTS NS_IMETHOD CreateInstance(nsIURL* aURL, const char* aContentType, const char* aCommand, nsIContentViewerContainer* aContainer, nsIStreamListener** aDocListener, nsIContentViewer** aDocViewer); nsresult InitUAStyleSheet(); nsresult CreateDefaultDocument(nsIURL* aURL, const char* aCommand, nsIContentViewerContainer* aContainer, nsIStreamListener** aDocListener, nsIContentViewer** aDocViewer); nsresult CreateXMLDocument(nsIURL* aURL, const char* aCommand, nsIContentViewerContainer* aContainer, nsIStreamListener** aDocListener, nsIContentViewer** aDocViewer); nsresult CreateRDFDocument(const char* aContentType, nsIURL* aURL, const char* aCommand, nsIContentViewerContainer* aContainer, nsIStreamListener** aDocListener, nsIContentViewer** aDocViewer); nsresult CreateImageDocument(nsIURL* aURL, const char* aCommand, nsIContentViewerContainer* aContainer, nsIStreamListener** aDocListener, nsIContentViewer** aDocViewer); nsresult CreatePluginDocument(nsIURL* aURL, const char* aCommand, const char* aContentType, nsIContentViewerContainer* aContainer, nsIStreamListener** aDocListener, nsIContentViewer** aDocViewer); }; static nsICSSStyleSheet* gUAStyleSheet; nsDocFactoryImpl::nsDocFactoryImpl() { NS_INIT_REFCNT(); } /* * Implementation of ISupports methods... */ NS_IMPL_ISUPPORTS(nsDocFactoryImpl,kIDocumentLoaderFactoryIID); static char* gValidTypes[] = {"text/html","application/rtf","text/plain",0}; static char* gXMLTypes[] = {"text/xml", "application/xml", 0}; static char* gRDFTypes[] = {"text/rdf", "text/xul", 0}; static char* gImageTypes[] = {"image/gif", "image/jpeg", "image/png", 0 }; static char* gPluginTypes[] = { "video/quicktime", "video/msvideo", "video/x-msvideo", "application/vnd.netfpx", "image/vnd.fpx", "model/vrml", "x-world/x-vrml", "audio/midi", "audio/x-midi", "audio/wav", "audio/x-wav", "audio/aiff", "audio/x-aiff", "audio/basic", "application/x-shockwave-flash", 0 }; NS_IMETHODIMP nsDocFactoryImpl::CreateInstance(nsIURL* aURL, const char* aContentType, const char *aCommand, nsIContentViewerContainer* aContainer, nsIStreamListener** aDocListener, nsIContentViewer** aDocViewer) { nsresult rv = NS_ERROR_FAILURE; if(0==PL_strcmp(gXMLTypes[0],aContentType)) if(0==PL_strcmp(aCommand,"view-source")) aContentType=gValidTypes[0]; int typeIndex=0; while(gValidTypes[typeIndex]) { if (0== PL_strcmp(gValidTypes[typeIndex++], aContentType)) { return CreateDefaultDocument(aURL, aCommand, aContainer, aDocListener, aDocViewer); } } // Try XML typeIndex = 0; while(gXMLTypes[typeIndex]) { if (0== PL_strcmp(gXMLTypes[typeIndex++], aContentType)) { return CreateXMLDocument(aURL, aCommand, aContainer, aDocListener, aDocViewer); } } // Try RDF typeIndex = 0; while (gRDFTypes[typeIndex]) { if (0 == PL_strcmp(gRDFTypes[typeIndex++], aContentType)) { return CreateRDFDocument(aContentType, aURL, aCommand, aContainer, aDocListener, aDocViewer); } } // Try image types typeIndex = 0; while(gImageTypes[typeIndex]) { if (0== PL_strcmp(gImageTypes[typeIndex++], aContentType)) { return CreateImageDocument(aURL, aCommand, aContainer, aDocListener, aDocViewer); } } // Try plugin types typeIndex = 0; while(gPluginTypes[typeIndex]) { if (0== PL_strcmp(gPluginTypes[typeIndex++], aContentType)) { return CreatePluginDocument(aURL, aCommand, aContentType, aContainer, aDocListener, aDocViewer); } } return rv; } nsresult nsDocFactoryImpl::CreateDefaultDocument(nsIURL* aURL, const char* aCommand, nsIContentViewerContainer* aContainer, nsIStreamListener** aDocListener, nsIContentViewer** aDocViewer) { nsresult rv = NS_ERROR_FAILURE; nsIDocument* doc = nsnull; nsIDocumentViewer* docv = nsnull; #ifdef NOISY_CREATE_DOC if (nsnull != aURL) { nsAutoString tmp; aURL->ToString(tmp); fputs(tmp, stdout); printf(": creating document\n"); } #endif // Load the UA style sheet if we haven't already done that if (nsnull == gUAStyleSheet) { InitUAStyleSheet(); } /* * Create the HTML document... */ rv = nsRepository::CreateInstance(kCHTMLDocumentCID, nsnull, kIDocumentIID, (void **)&doc); if (NS_OK != rv) { goto done; } /* * Create the HTML Content Viewer... */ rv = NS_NewDocumentViewer(docv); if (NS_OK != rv) { goto done; } docv->SetUAStyleSheet(gUAStyleSheet); /* * Initialize the document to begin loading the data... * * An nsIStreamListener connected to the parser is returned in * aDocListener. */ rv = doc->StartDocumentLoad(aURL, aContainer, aDocListener, aCommand); if (NS_OK != rv) { NS_IF_RELEASE(docv); goto done; } /* * Bind the document to the Content Viewer... */ rv = docv->BindToDocument(doc, aCommand); *aDocViewer = docv; done: NS_IF_RELEASE(doc); return rv; } nsresult nsDocFactoryImpl::CreateXMLDocument(nsIURL* aURL, const char* aCommand, nsIContentViewerContainer* aContainer, nsIStreamListener** aDocListener, nsIContentViewer** aDocViewer) { nsresult rv = NS_ERROR_FAILURE; nsIDocument* doc = nsnull; nsIDocumentViewer* docv = nsnull; // Load the UA style sheet if we haven't already done that if (nsnull == gUAStyleSheet) { InitUAStyleSheet(); } /* * Create the image document... */ rv = nsRepository::CreateInstance(kCXMLDocumentCID, nsnull, kIDocumentIID, (void **)&doc); if (NS_OK != rv) { goto done; } /* * Create the image content viewer... */ rv = NS_NewDocumentViewer(docv); if (NS_OK != rv) { goto done; } docv->SetUAStyleSheet(gUAStyleSheet); /* * Initialize the document to begin loading the data... * * An nsIStreamListener connected to the parser is returned in * aDocListener. */ rv = doc->StartDocumentLoad(aURL, aContainer, aDocListener, aCommand); if (NS_OK != rv) { NS_IF_RELEASE(docv); goto done; } /* * Bind the document to the Content Viewer... */ rv = docv->BindToDocument(doc, aCommand); *aDocViewer = docv; done: NS_IF_RELEASE(doc); return rv; } nsresult nsDocFactoryImpl::CreateRDFDocument(const char* aContentType, nsIURL* aURL, const char* aCommand, nsIContentViewerContainer* aContainer, nsIStreamListener** aDocListener, nsIContentViewer** aDocViewer) { nsresult rv = NS_ERROR_FAILURE; nsIDocument* doc = nsnull; nsIDocumentViewer* docv = nsnull; // Load the UA style sheet if we haven't already done that if (nsnull == gUAStyleSheet) { InitUAStyleSheet(); } /* * Create the image document... */ if (NS_FAILED(rv = nsRepository::CreateInstance(kCXULDocumentCID, nsnull, kIDocumentIID, (void **)&doc))) goto done; /* * Create the image content viewer... */ if (NS_FAILED(rv = NS_NewDocumentViewer(docv))) goto done; docv->SetUAStyleSheet(gUAStyleSheet); /* * Initialize the document to begin loading the data... * * An nsIStreamListener connected to the parser is returned in * aDocListener. */ if (NS_FAILED(rv = doc->StartDocumentLoad(aURL, aContainer, aDocListener, aCommand))) { NS_RELEASE(docv); goto done; } /* * Bind the document to the Content Viewer... */ rv = docv->BindToDocument(doc, aCommand); *aDocViewer = docv; done: NS_IF_RELEASE(doc); return rv; } nsresult nsDocFactoryImpl::CreateImageDocument(nsIURL* aURL, const char* aCommand, nsIContentViewerContainer* aContainer, nsIStreamListener** aDocListener, nsIContentViewer** aDocViewer) { nsresult rv = NS_ERROR_FAILURE; nsIDocument* doc = nsnull; nsIDocumentViewer* docv = nsnull; // Load the UA style sheet if we haven't already done that if (nsnull == gUAStyleSheet) { InitUAStyleSheet(); } /* * Create the image document... */ rv = nsRepository::CreateInstance(kCImageDocumentCID, nsnull, kIDocumentIID, (void **)&doc); if (NS_OK != rv) { goto done; } /* * Create the image content viewer... */ rv = NS_NewDocumentViewer(docv); if (NS_OK != rv) { goto done; } docv->SetUAStyleSheet(gUAStyleSheet); /* * Initialize the document to begin loading the data... * * An nsIStreamListener connected to the parser is returned in * aDocListener. */ rv = doc->StartDocumentLoad(aURL, aContainer, aDocListener,aCommand); if (NS_OK != rv) { NS_IF_RELEASE(docv); goto done; } /* * Bind the document to the Content Viewer... */ rv = docv->BindToDocument(doc, aCommand); *aDocViewer = docv; done: NS_IF_RELEASE(doc); return rv; } extern nsresult NS_NewPluginContentViewer(const char* aCommand, nsIStreamListener** aDocListener, nsIContentViewer** aDocViewer); nsresult nsDocFactoryImpl::CreatePluginDocument(nsIURL* aURL, const char* aCommand, const char* aContentType, nsIContentViewerContainer* aContainer, nsIStreamListener** aDocListener, nsIContentViewer** aDocViewer) { /* * Create the plugin content viewer and stream listener... */ nsresult rv = NS_NewPluginContentViewer(aCommand, aDocListener, aDocViewer); return rv; } #define UA_CSS_URL "resource:/res/ua.css" nsresult nsDocFactoryImpl::InitUAStyleSheet() { nsresult rv = NS_OK; if (nsnull == gUAStyleSheet) { // snarf one nsIURL* uaURL; rv = NS_NewURL(&uaURL, nsString(UA_CSS_URL)); // XXX this bites, fix it if (NS_OK == rv) { // Get an input stream from the url nsIInputStream* in; rv = NS_OpenURL(uaURL, &in); if (rv == NS_OK) { // Translate the input using the argument character set id into unicode nsIUnicharInputStream* uin; rv = NS_NewConverterStream(&uin, nsnull, in); if (NS_OK == rv) { // Create parser and set it up to process the input file nsICSSParser* css; rv = NS_NewCSSParser(&css); if (NS_OK == rv) { // Parse the input and produce a style set // XXX note: we are ignoring rv until the error code stuff in the // input routines is converted to use nsresult's css->Parse(uin, uaURL, gUAStyleSheet); NS_RELEASE(css); } NS_RELEASE(uin); } NS_RELEASE(in); } else { printf("open of %s failed: error=%x\n", UA_CSS_URL, rv); rv = NS_ERROR_ILLEGAL_VALUE; // XXX need a better error code here } NS_RELEASE(uaURL); } } return rv; } /**************************************************************************** * nsDocLoaderImpl implementation... ****************************************************************************/ class nsDocLoaderImpl : public nsIDocumentLoader, public nsIURLGroup { public: nsDocLoaderImpl(); NS_DECL_ISUPPORTS // nsIDocumentLoader interface NS_IMETHOD LoadDocument(const nsString& aURLSpec, const char *aCommand, nsIContentViewerContainer* aContainer, nsIPostData* aPostData = nsnull, nsISupports* aExtraInfo = nsnull, nsIStreamObserver* anObserver = nsnull, nsURLReloadType aType = nsURLReload, const PRUint32 aLocalIP = 0); NS_IMETHOD Stop(void); NS_IMETHOD IsBusy(PRBool& aResult); NS_IMETHOD CreateDocumentLoader(nsIDocumentLoader** anInstance); NS_IMETHOD SetDocumentFactory(nsIDocumentLoaderFactory* aFactory); NS_IMETHOD AddObserver(nsIDocumentLoaderObserver *aObserver); NS_IMETHOD RemoveObserver(nsIDocumentLoaderObserver *aObserver); NS_IMETHOD SetContainer(nsIContentViewerContainer* aContainer); NS_IMETHOD GetContainer(nsIContentViewerContainer** aResult); // nsIURLGroup interface... NS_IMETHOD CreateURL(nsIURL** aInstancePtrResult, nsIURL* aBaseURL, const nsString& aSpec, nsISupports* aContainer); NS_IMETHOD OpenStream(nsIURL *aUrl, nsIStreamListener *aConsumer); NS_IMETHOD GetDefaultLoadAttributes(nsILoadAttribs*& aLoadAttribs); NS_IMETHOD SetDefaultLoadAttributes(nsILoadAttribs* aLoadAttribs); NS_IMETHOD AddChildGroup(nsIURLGroup* aGroup); NS_IMETHOD RemoveChildGroup(nsIURLGroup* aGroup); // Implementation specific methods... void LoadURLComplete(nsIURL* aURL, nsISupports* aLoader, PRInt32 aStatus); void LoadURLStarted(nsIURL* aURL, const char* aContentType, nsIContentViewer* aViewer); void AreAllConnectionsComplete(void); void SetParent(nsDocLoaderImpl* aParent); protected: virtual ~nsDocLoaderImpl(); private: static PRBool StopBindInfoEnumerator (nsISupports* aElement, void* aData); static PRBool StopDocLoaderEnumerator(void* aElement, void* aData); static PRBool IsBusyEnumerator(void* aElement, void* aData); public: nsIDocumentLoaderFactory* m_DocFactory; protected: nsISupportsArray* m_LoadingDocsList; nsVoidArray mChildGroupList; nsVoidArray mDocObservers; nsILoadAttribs* m_LoadAttrib; nsIStreamObserver* mStreamObserver; nsIContentViewerContainer* mContainer; nsDocLoaderImpl* mParent; /* * The following counts are for the current document loader only. They * do not take into account URLs being loaded by child document loaders. */ PRInt32 mForegroundURLs; PRInt32 mTotalURLs; /* * This flag indicates that the loader is loading a document. It is set * from the call to LoadDocument(...) until the OnConnectionsComplete(...) * notification is fired... */ PRBool mIsLoadingDocument; }; nsDocLoaderImpl::nsDocLoaderImpl() { NS_INIT_REFCNT(); #if defined(DEBUG) || defined(FORCE_PR_LOG) if (nsnull == gDocLoaderLog) { gDocLoaderLog = PR_NewLogModule("DocLoader"); } #endif /* DEBUG || FORCE_PR_LOG */ mParent = nsnull; mStreamObserver = nsnull; mContainer = nsnull; mForegroundURLs = 0; mTotalURLs = 0; mIsLoadingDocument = PR_FALSE; NS_NewISupportsArray(&m_LoadingDocsList); NS_NewLoadAttribs(&m_LoadAttrib); m_DocFactory = new nsDocFactoryImpl(); NS_ADDREF(m_DocFactory); PR_LOG(gDocLoaderLog, PR_LOG_DEBUG, ("DocLoader - DocLoader [%p] created.\n", this)); } nsDocLoaderImpl::~nsDocLoaderImpl() { Stop(); if (nsnull != mParent) { mParent->RemoveChildGroup(this); NS_RELEASE(mParent); } NS_IF_RELEASE(m_LoadingDocsList); NS_IF_RELEASE(m_DocFactory); NS_IF_RELEASE(m_LoadAttrib); NS_IF_RELEASE(mStreamObserver); NS_IF_RELEASE(mContainer); PR_LOG(gDocLoaderLog, PR_LOG_DEBUG, ("DocLoader - DocLoader [%p] deleted.\n", this)); NS_PRECONDITION((0 == mChildGroupList.Count()), "Document loader has children..."); } /* * Implementation of ISupports methods... */ NS_IMPL_ADDREF(nsDocLoaderImpl); NS_IMPL_RELEASE(nsDocLoaderImpl); NS_IMETHODIMP nsDocLoaderImpl::QueryInterface(REFNSIID aIID, void** aInstancePtr) { if (NULL == aInstancePtr) { return NS_ERROR_NULL_POINTER; } if (aIID.Equals(kIDocumentLoaderIID)) { *aInstancePtr = (void*)(nsIDocumentLoader*)this; NS_ADDREF_THIS(); return NS_OK; } if (aIID.Equals(kIURLGroupIID)) { *aInstancePtr = (void*)(nsIURLGroup*)this; NS_ADDREF_THIS(); return NS_OK; } return NS_NOINTERFACE; } NS_IMETHODIMP nsDocLoaderImpl::CreateDocumentLoader(nsIDocumentLoader** anInstance) { nsDocLoaderImpl* newLoader = nsnull; nsresult rv = NS_OK; /* Check for initial error conditions... */ if (nsnull == anInstance) { rv = NS_ERROR_NULL_POINTER; goto done; } NS_NEWXPCOM(newLoader, nsDocLoaderImpl); if (nsnull == newLoader) { *anInstance = nsnull; rv = NS_ERROR_OUT_OF_MEMORY; goto done; } rv = newLoader->QueryInterface(kIDocumentLoaderIID, (void**)anInstance); if (NS_SUCCEEDED(rv)) { AddChildGroup(newLoader); newLoader->SetParent(this); } done: return rv; } NS_IMETHODIMP nsDocLoaderImpl::SetDocumentFactory(nsIDocumentLoaderFactory* aFactory) { NS_IF_RELEASE(m_DocFactory); m_DocFactory = aFactory; NS_IF_ADDREF(m_DocFactory); return NS_OK; } NS_IMETHODIMP nsDocLoaderImpl::LoadDocument(const nsString& aURLSpec, const char* aCommand, nsIContentViewerContainer* aContainer, nsIPostData* aPostData, nsISupports* aExtraInfo, nsIStreamObserver* anObserver, nsURLReloadType aType, const PRUint32 aLocalIP) { nsresult rv; nsURLLoadType loadType; nsDocumentBindInfo* loader = nsnull; #ifdef DEBUG char buffer[256]; aURLSpec.ToCString(buffer, sizeof(buffer)); PR_LOG(gDocLoaderLog, PR_LOG_DEBUG, ("DocLoader - LoadDocument(...) called for %s.", buffer)); #endif /* DEBUG */ /* Check for initial error conditions... */ if (nsnull == aContainer) { rv = NS_ERROR_NULL_POINTER; goto done; } NS_NEWXPCOM(loader, nsDocumentBindInfo); if (nsnull == loader) { rv = NS_ERROR_OUT_OF_MEMORY; goto done; } loader->Init(this, // DocLoader aCommand, // Command aContainer, // Viewer Container aExtraInfo, // Extra Info anObserver); // Observer /* The DocumentBindInfo reference is only held by the Array... */ m_LoadingDocsList->AppendElement((nsIStreamListener *)loader); /* Initialize the URL counters... */ NS_PRECONDITION(((mTotalURLs == 0) && (mForegroundURLs == 0)), "DocuemntLoader is busy..."); rv = m_LoadAttrib->GetLoadType(&loadType); if (NS_FAILED(rv)) { loadType = nsURLLoadNormal; } if (nsURLLoadBackground != loadType) { mForegroundURLs = 1; } mTotalURLs = 1; /* * Set the flag indicating that the document loader is in the process of * loading a document. This flag will remain set until the * OnConnectionsComplete(...) notification is fired for the loader... */ mIsLoadingDocument = PR_TRUE; m_LoadAttrib->SetReloadType(aType); // If we've got special loading instructions, mind them. if ((aType == nsURLReloadBypassProxy) || (aType == nsURLReloadBypassCacheAndProxy)) { m_LoadAttrib->SetBypassProxy(PR_TRUE); } if ( aLocalIP ) { m_LoadAttrib->SetLocalIP(aLocalIP); } NS_IF_RELEASE(mStreamObserver); mStreamObserver = anObserver; NS_IF_ADDREF(mStreamObserver); rv = loader->Bind(aURLSpec, aPostData, nsnull); done: return rv; } NS_IMETHODIMP nsDocLoaderImpl::Stop(void) { PR_LOG(gDocLoaderLog, PR_LOG_DEBUG, ("DocLoader - Stop() called\n")); m_LoadingDocsList->EnumerateForwards(nsDocLoaderImpl::StopBindInfoEnumerator, nsnull); /* * Now the only reference to each nsDocumentBindInfo instance is held by * Netlib via the nsIStreamListener interface... * * When each connection is aborted, Netlib will release its reference to * the StreamListener and the DocumentBindInfo object will be deleted... */ m_LoadingDocsList->Clear(); /* * Now Stop() all documents being loaded by child DocumentLoaders... */ mChildGroupList.EnumerateForwards(nsDocLoaderImpl::StopDocLoaderEnumerator, nsnull); /* Reset the URL counters... */ mForegroundURLs = 0; mTotalURLs = 0; /* * Release the Stream Observer... * It will be set on the next LoadDocument(...) */ NS_IF_RELEASE(mStreamObserver); return NS_OK; } NS_IMETHODIMP nsDocLoaderImpl::IsBusy(PRBool& aResult) { aResult = PR_FALSE; /* If this document loader is busy? */ if (0 != mForegroundURLs) { aResult = PR_TRUE; } /* Otherwise, check its child document loaders... */ else { mChildGroupList.EnumerateForwards(nsDocLoaderImpl::IsBusyEnumerator, (void*)&aResult); } return NS_OK; } /* * Do not hold refs to the objects in the observer lists. Observers * are expected to remove themselves upon their destruction if they * have not removed themselves previously */ NS_IMETHODIMP nsDocLoaderImpl::AddObserver(nsIDocumentLoaderObserver* aObserver) { // Make sure the observer isn't already in the list if (mDocObservers.IndexOf(aObserver) == -1) { mDocObservers.AppendElement(aObserver); } return NS_OK; } NS_IMETHODIMP nsDocLoaderImpl::RemoveObserver(nsIDocumentLoaderObserver* aObserver) { if (PR_TRUE == mDocObservers.RemoveElement(aObserver)) { return NS_OK; } return NS_ERROR_FAILURE; } NS_IMETHODIMP nsDocLoaderImpl::SetContainer(nsIContentViewerContainer* aContainer) { NS_IF_RELEASE(mContainer); mContainer = aContainer; NS_IF_ADDREF(mContainer); return NS_OK; } NS_IMETHODIMP nsDocLoaderImpl::GetContainer(nsIContentViewerContainer** aResult) { nsresult rv = NS_OK; if (nsnull == aResult) { rv = NS_ERROR_NULL_POINTER; } else { *aResult = mContainer; NS_IF_ADDREF(mContainer); } return rv; } NS_IMETHODIMP nsDocLoaderImpl::CreateURL(nsIURL** aInstancePtrResult, nsIURL* aBaseURL, const nsString& aURLSpec, nsISupports* aContainer) { nsresult rv; nsIURL* url = nsnull; /* Check for initial error conditions... */ if (nsnull == aInstancePtrResult) { rv = NS_ERROR_NULL_POINTER; } else { rv = NS_NewURL(&url, aURLSpec, aBaseURL, aContainer, this); if (NS_SUCCEEDED(rv)) { nsILoadAttribs* loadAttributes; rv = url->GetLoadAttribs(&loadAttributes); if (rv == NS_OK) { loadAttributes->Clone(m_LoadAttrib); NS_RELEASE(loadAttributes); } } *aInstancePtrResult = url; } return rv; } NS_IMETHODIMP nsDocLoaderImpl::OpenStream(nsIURL *aUrl, nsIStreamListener *aConsumer) { nsresult rv; nsDocumentBindInfo* loader = nsnull; nsURLLoadType loadType = nsURLLoadNormal; #ifdef DEBUG const char* buffer; aUrl->GetSpec(&buffer); PR_LOG(gDocLoaderLog, PR_LOG_DEBUG, ("DocLoader - OpenStream(...) called for %s.", buffer)); #endif /* DEBUG */ NS_NEWXPCOM(loader, nsDocumentBindInfo); if (nsnull == loader) { rv = NS_ERROR_OUT_OF_MEMORY; goto done; } loader->Init(this, // DocLoader nsnull, // Command mContainer, // Viewer Container nsnull, // Extra Info mStreamObserver); // Observer /* The DocumentBindInfo reference is only held by the Array... */ m_LoadingDocsList->AppendElement(((nsISupports*)(nsIStreamObserver*)loader)); /* Update the URL counters... */ nsILoadAttribs* loadAttributes; rv = aUrl->GetLoadAttribs(&loadAttributes); if (rv == NS_OK) { rv = loadAttributes->GetLoadType(&loadType); if (NS_FAILED(rv)) { loadType = nsURLLoadNormal; } NS_RELEASE(loadAttributes); } if (nsURLLoadBackground != loadType) { mForegroundURLs += 1; } mTotalURLs += 1; rv = loader->Bind(aUrl, aConsumer); done: return rv; } NS_IMETHODIMP nsDocLoaderImpl::GetDefaultLoadAttributes(nsILoadAttribs*& aLoadAttribs) { aLoadAttribs = m_LoadAttrib; NS_IF_ADDREF(m_LoadAttrib); return NS_OK;; } NS_IMETHODIMP nsDocLoaderImpl::SetDefaultLoadAttributes(nsILoadAttribs* aLoadAttribs) { m_LoadAttrib->Clone(aLoadAttribs); /* * Now set the default attributes for all child DocumentLoaders... */ PRInt32 count = mChildGroupList.Count(); PRInt32 index; for (index = 0; index < count; index++) { nsIURLGroup* child = (nsIURLGroup*)mChildGroupList.ElementAt(index); child->SetDefaultLoadAttributes(m_LoadAttrib); } return NS_OK; } NS_IMETHODIMP nsDocLoaderImpl::AddChildGroup(nsIURLGroup* aGroup) { mChildGroupList.AppendElement(aGroup); return NS_OK; } NS_IMETHODIMP nsDocLoaderImpl::RemoveChildGroup(nsIURLGroup* aGroup) { nsresult rv = NS_OK; if (PR_FALSE == mChildGroupList.RemoveElement(aGroup)) { rv = NS_ERROR_FAILURE; } return rv; } void nsDocLoaderImpl::LoadURLStarted(nsIURL* aURL, const char* aContentType, nsIContentViewer* aViewer) { PRInt32 count = mDocObservers.Count(); PRInt32 index; /* * First notify any observers that the URL load has begun... */ for (index = 0; index < count; index++) { nsIDocumentLoaderObserver* observer = (nsIDocumentLoaderObserver*)mDocObservers.ElementAt(index); observer->OnStartURLLoad(aURL, aContentType, aViewer); } /* * Finally notify the parent... */ if (nsnull != mParent) { mParent->LoadURLStarted(aURL, aContentType, aViewer); } } void nsDocLoaderImpl::LoadURLComplete(nsIURL* aURL, nsISupports* aBindInfo, PRInt32 aStatus) { PRBool rv; PRBool bIsForegroundURL = PR_FALSE; /* * If the entry is not found in the list, then it must have been cancelled * via Stop(...). So ignore just it... */ rv = m_LoadingDocsList->RemoveElement(aBindInfo); if (PR_FALSE != rv) { nsILoadAttribs* loadAttributes; nsURLLoadType loadType = nsURLLoadNormal; rv = aURL->GetLoadAttribs(&loadAttributes); if (rv == NS_OK) { rv = loadAttributes->GetLoadType(&loadType); if (NS_FAILED(rv)) { loadType = nsURLLoadNormal; } NS_RELEASE(loadAttributes); } if (nsURLLoadBackground != loadType) { mForegroundURLs -= 1; bIsForegroundURL = PR_TRUE; } mTotalURLs -= 1; NS_ASSERTION((mTotalURLs >= mForegroundURLs), "Foreground URL count is wrong."); #ifdef DEBUG const char* buffer; aURL->GetSpec(&buffer); PR_LOG(gDocLoaderLog, PR_LOG_DEBUG, ("DocLoader - LoadURLComplete(...) called for %s.\nForeground URLs: %d\nTotal URLs: %d\n", buffer, mForegroundURLs, mTotalURLs)); #endif /* DEBUG */ /* * If this was the last URL for the entire document (including any sub * documents) then fire an OnConnectionsComplete(...) notification. * * If the URL was a background URL, then ignore it... */ if (PR_FALSE != bIsForegroundURL) { AreAllConnectionsComplete(); } } } void nsDocLoaderImpl::AreAllConnectionsComplete(void) { PRBool bIsBusy = PR_TRUE; /* * Fire an OnConnectionsComplete(...) notification if the document loader * is looading a document, but all of the document URLs have been completed. */ if (mIsLoadingDocument) { IsBusy(bIsBusy); if (!bIsBusy) { PRInt32 count = mDocObservers.Count(); PRInt32 index; PR_LOG(gDocLoaderLog, PR_LOG_DEBUG, ("DocLoader [%p] - OnConnectionsComplete(...) called.\n", this)); /* * Clear the flag indicating that the document loader is still loading a * document... */ mIsLoadingDocument = PR_FALSE; /* Notify all observers that all connections have been loaded... */ for (index = 0; index < count; index++) { nsIDocumentLoaderObserver* observer = (nsIDocumentLoaderObserver*)mDocObservers.ElementAt(index); observer->OnConnectionsComplete(); } } } /* * See if the parent document loader has finished all of its connections * too.. */ if ((!bIsBusy) && (nsnull != mParent)) { mParent->AreAllConnectionsComplete(); } } void nsDocLoaderImpl::SetParent(nsDocLoaderImpl* aParent) { NS_IF_RELEASE(mParent); mParent = aParent; NS_IF_ADDREF(mParent); } PRBool nsDocLoaderImpl::StopBindInfoEnumerator(nsISupports* aElement, void* aData) { nsresult rv; nsDocumentBindInfo* bindInfo; rv = aElement->QueryInterface(kDocumentBindInfoIID, (void**)&bindInfo); if (NS_OK == rv) { bindInfo->Stop(); NS_RELEASE(bindInfo); } return PR_TRUE; } PRBool nsDocLoaderImpl::StopDocLoaderEnumerator(void* aElement, void* aData) { nsresult rv; nsIDocumentLoader* docLoader; rv = ((nsISupports*)aElement)->QueryInterface(kIDocumentLoaderIID, (void**)&docLoader); if (NS_OK == rv) { docLoader->Stop(); NS_RELEASE(docLoader); } return PR_TRUE; } PRBool nsDocLoaderImpl::IsBusyEnumerator(void* aElement, void* aData) { nsresult rv; nsIDocumentLoader* docLoader; PRBool* result = (PRBool*)aData; rv = ((nsISupports*)aElement)->QueryInterface(kIDocumentLoaderIID, (void**)&docLoader); if (NS_OK == rv) { docLoader->IsBusy(*result); NS_RELEASE(docLoader); } return !(*result); } /**************************************************************************** * nsDocumentBindInfo implementation... ****************************************************************************/ nsDocumentBindInfo::nsDocumentBindInfo() { NS_INIT_REFCNT(); m_Command = nsnull; m_Url = nsnull; m_Container = nsnull; m_ExtraInfo = nsnull; m_Observer = nsnull; m_NextStream = nsnull; m_DocLoader = nsnull; mStatus = NS_OK; } nsresult nsDocumentBindInfo::Init(nsDocLoaderImpl* aDocLoader, const char *aCommand, nsIContentViewerContainer* aContainer, nsISupports* aExtraInfo, nsIStreamObserver* anObserver) { m_Url = nsnull; m_NextStream = nsnull; m_Command = (nsnull != aCommand) ? PL_strdup(aCommand) : nsnull; m_DocLoader = aDocLoader; NS_ADDREF(m_DocLoader); m_Container = aContainer; NS_IF_ADDREF(m_Container); m_Observer = anObserver; NS_IF_ADDREF(m_Observer); m_ExtraInfo = aExtraInfo; NS_IF_ADDREF(m_ExtraInfo); mStatus = NS_OK; return NS_OK; } nsDocumentBindInfo::~nsDocumentBindInfo() { if (m_Command) { PR_Free(m_Command); } m_Command = nsnull; NS_RELEASE (m_DocLoader); NS_IF_RELEASE(m_Url); NS_IF_RELEASE(m_NextStream); NS_IF_RELEASE(m_Container); NS_IF_RELEASE(m_Observer); NS_IF_RELEASE(m_ExtraInfo); } /* * Implementation of ISupports methods... */ NS_IMPL_ADDREF(nsDocumentBindInfo); NS_IMPL_RELEASE(nsDocumentBindInfo); nsresult nsDocumentBindInfo::QueryInterface(const nsIID& aIID, void** aInstancePtrResult) { NS_PRECONDITION(nsnull != aInstancePtrResult, "null pointer"); if (nsnull == aInstancePtrResult) { return NS_ERROR_NULL_POINTER; } *aInstancePtrResult = NULL; if (aIID.Equals(kIStreamObserverIID)) { *aInstancePtrResult = (void*) ((nsIStreamObserver*)this); NS_ADDREF_THIS(); return NS_OK; } if (aIID.Equals(kIStreamListenerIID)) { *aInstancePtrResult = (void*) ((nsIStreamListener*)this); NS_ADDREF_THIS(); return NS_OK; } if (aIID.Equals(kDocumentBindInfoIID)) { *aInstancePtrResult = (void*) this; NS_ADDREF_THIS(); return NS_OK; } if (aIID.Equals(kRefreshURLIID)) { *aInstancePtrResult = (void*) ((nsIRefreshUrl*)this); NS_ADDREF_THIS(); return NS_OK; } return NS_NOINTERFACE; } nsresult nsDocumentBindInfo::Bind(const nsString& aURLSpec, nsIPostData* aPostData, nsIStreamListener* aListener) { nsresult rv; nsIURL* url = nsnull; /* If this nsDocumentBindInfo was created with a container pointer. * extract the nsISupports iface from it and create the url with * the nsISupports pointer so the backend can have access to the front * end nsIContentViewerContainer for refreshing urls. */ rv = m_DocLoader->CreateURL(&url, nsnull, aURLSpec, m_Container); if (NS_FAILED(rv)) { return rv; } /* Store any POST data into the URL */ if (nsnull != aPostData) { static NS_DEFINE_IID(kPostToServerIID, NS_IPOSTTOSERVER_IID); nsIPostToServer* pts; rv = url->QueryInterface(kPostToServerIID, (void **)&pts); if (NS_OK == rv) { const char* data = aPostData->GetData(); if (aPostData->IsFile()) { pts->SendDataFromFile(data); } else { pts->SendData(data, aPostData->GetDataLength()); } } } rv = Bind(url, aListener); NS_RELEASE(url); return rv; } nsresult nsDocumentBindInfo::Bind(nsIURL* aURL, nsIStreamListener* aListener) { nsresult rv = NS_OK; nsINetService *inet = nsnull; m_Url = aURL; NS_ADDREF(m_Url); /* Set up the stream listener (if provided)... */ if (nsnull != aListener) { m_NextStream = aListener; NS_ADDREF(m_NextStream); } /* Start the URL binding process... */ rv = nsServiceManager::GetService(kNetServiceCID, kINetServiceIID, (nsISupports **)&inet); if (NS_OK == rv) { rv = inet->OpenStream(m_Url, this); nsServiceManager::ReleaseService(kNetServiceCID, inet); } return rv; } nsresult nsDocumentBindInfo::Stop(void) { nsresult rv; nsINetService* inet; const char* spec; if (m_Url == nsnull) return NS_OK; rv = m_Url->GetSpec(&spec); if (rv == NS_OK) PR_LOG(gDocLoaderLog, PR_LOG_DEBUG, ("DocLoader - Stop(...) called for %s.\n", spec)); /* * Mark the IStreamListener as being aborted... If more data is pushed * down the stream, the connection will be aborted... */ mStatus = NS_BINDING_ABORTED; /* Stop the URL binding process... */ rv = nsServiceManager::GetService(kNetServiceCID, kINetServiceIID, (nsISupports **)&inet); if (NS_SUCCEEDED(rv)) { rv = inet->InterruptStream(m_Url); nsServiceManager::ReleaseService(kNetServiceCID, inet); } return rv; } NS_METHOD nsDocumentBindInfo::GetBindInfo(nsIURL* aURL, nsStreamBindingInfo* aInfo) { nsresult rv = NS_OK; NS_PRECONDITION(nsnull !=m_NextStream, "DocLoader: No stream for document"); if (nsnull != m_NextStream) { rv = m_NextStream->GetBindInfo(aURL, aInfo); } return rv; } NS_METHOD nsDocumentBindInfo::OnProgress(nsIURL* aURL, PRUint32 aProgress, PRUint32 aProgressMax) { nsresult rv = NS_OK; const char* spec; (void)aURL->GetSpec(&spec); PR_LOG(gDocLoaderLog, PR_LOG_DEBUG, ("DocLoader - OnProgress(...) called for %s. Progress: %d. ProgressMax: %d\n", spec, aProgress, aProgressMax)); /* Pass the notification out to the next stream listener... */ if (nsnull != m_NextStream) { rv = m_NextStream->OnProgress(aURL, aProgress, aProgressMax); } /* Pass the notification out to the Observer... */ if (nsnull != m_Observer) { /* XXX: Should we ignore the return value? */ (void) m_Observer->OnProgress(aURL, aProgress, aProgressMax); } return rv; } NS_METHOD nsDocumentBindInfo::OnStatus(nsIURL* aURL, const PRUnichar* aMsg) { nsresult rv = NS_OK; /* Pass the notification out to the next stream listener... */ if (nsnull != m_NextStream) { rv = m_NextStream->OnStatus(aURL, aMsg); } /* Pass the notification out to the Observer... */ if (nsnull != m_Observer) { /* XXX: Should we ignore the return value? */ (void) m_Observer->OnStatus(aURL, aMsg); } return rv; } NS_METHOD nsDocumentBindInfo::OnStartBinding(nsIURL* aURL, const char *aContentType) { nsresult rv = NS_OK; nsIContentViewer* viewer = nsnull; const char* spec; (void)aURL->GetSpec(&spec); PR_LOG(gDocLoaderLog, PR_LOG_DEBUG, ("DocLoader - OnStartBinding(...) called for %s. Content-type is %s\n", spec, aContentType)); /* If the binding has been canceled via Stop() then abort the load... */ if (NS_BINDING_ABORTED == mStatus) { rv = NS_BINDING_ABORTED; goto done; } if (nsnull == m_NextStream) { /* * Now that the content type is available, create a document (and viewer) * of the appropriate type... */ if (m_DocLoader->m_DocFactory) { rv = m_DocLoader->m_DocFactory->CreateInstance(m_Url, aContentType, m_Command, m_Container, &m_NextStream, &viewer); } else { rv = NS_ERROR_NULL_POINTER; } if (NS_OK != rv) { printf("DocLoaderFactory: Unable to create ContentViewer for content-type: %s\n", aContentType); goto done; } /* * Give the document container the new viewer... */ viewer->SetContainer(m_Container); rv = m_Container->Embed(viewer, m_Command, m_ExtraInfo); if (NS_OK != rv) { goto done; } } /* * Pass the OnStartBinding(...) notification out to the document * IStreamListener. */ if (nsnull != m_NextStream) { rv = m_NextStream->OnStartBinding(aURL, aContentType); } /* * Notify the DocumentLoadObserver(s) */ if ((nsnull == viewer) && (nsnull != m_Container)) { m_Container->GetContentViewer(&viewer); } m_DocLoader->LoadURLStarted(m_Url, aContentType, viewer); /* Pass the notification out to the Observer... */ if (nsnull != m_Observer) { nsresult rv2 = m_Observer->OnStartBinding(aURL, aContentType); if (rv == NS_OK) rv = rv2; } done: NS_IF_RELEASE(viewer); return rv; } NS_METHOD nsDocumentBindInfo::OnDataAvailable(nsIURL* aURL, nsIInputStream *aStream, PRUint32 aLength) { nsresult rv = NS_OK; const char* spec; (void)aURL->GetSpec(&spec); PR_LOG(gDocLoaderLog, PR_LOG_DEBUG, ("DocLoader - OnDataAvailable(...) called for %s. Bytes available: %d.\n", spec, aLength)); /* If the binding has been canceled via Stop() then abort the load... */ if (NS_BINDING_ABORTED == mStatus) { rv = NS_BINDING_ABORTED; goto done; } if (nsnull != m_NextStream) { /* * Bump the refcount in case the stream gets destroyed while the data * is being processed... If Stop(...) is called the stream could be * freed prematurely :-( * * Currently this can happen if javascript loads a new URL * (via nsIWebShell::LoadURL) during the parse phase... */ nsIStreamListener* listener = m_NextStream; NS_ADDREF(listener); rv = listener->OnDataAvailable(aURL, aStream, aLength); NS_RELEASE(listener); } else { rv = NS_BINDING_FAILED; } done: return rv; } NS_METHOD nsDocumentBindInfo::OnStopBinding(nsIURL* aURL, nsresult aStatus, const PRUnichar* aMsg) { nsresult rv = NS_OK; const char* spec; (void)aURL->GetSpec(&spec); PR_LOG(gDocLoaderLog, PR_LOG_DEBUG, ("DocLoader - OnStopBinding(...) called for %s. Status: %d.\n", spec, aStatus)); if (nsnull != m_NextStream) { rv = m_NextStream->OnStopBinding(aURL, aStatus, aMsg); } /* Pass the notification out to the Observer... */ if (nsnull != m_Observer) { /* XXX: Should we ignore the return value? */ (void) m_Observer->OnStopBinding(aURL, aStatus, aMsg); } /* * The stream is complete... Tell the DocumentLoader to release us... */ m_DocLoader->LoadURLComplete(aURL, (nsIStreamListener *)this, aStatus); NS_IF_RELEASE(m_NextStream); return rv; } NS_METHOD nsDocumentBindInfo::RefreshURL(nsIURL* aURL, PRInt32 millis, PRBool repeat) { if (nsnull != m_Container) { nsresult rv; nsIRefreshUrl* refresher = nsnull; /* Delegate the actual refresh call up-to the container. */ rv = m_Container->QueryInterface(kRefreshURLIID, (void**)&refresher); if (rv != NS_OK) { return PR_FALSE; } rv = refresher->RefreshURL(aURL, millis, repeat); NS_RELEASE(refresher); return rv; } return PR_FALSE; } NS_METHOD nsDocumentBindInfo::CancelRefreshURLTimers(void) { if (nsnull != m_Container) { nsresult rv; nsIRefreshUrl* refresher = nsnull; /* Delegate the actual cancel call up-to the container. */ rv = m_Container->QueryInterface(kRefreshURLIID, (void**)&refresher); if (rv != NS_OK) { return PR_FALSE; } rv = refresher->CancelRefreshURLTimers(); NS_RELEASE(refresher); return rv; } return PR_FALSE; } /******************************************* * nsDocLoaderServiceFactory *******************************************/ static nsDocLoaderImpl* gServiceInstance = nsnull; class nsDocLoaderServiceFactory : public nsFactory { public: NS_IMETHOD CreateInstance(nsISupports *aOuter, const nsIID &aIID, void **aResult); }; NS_IMETHODIMP nsDocLoaderServiceFactory::CreateInstance(nsISupports *aOuter, const nsIID &aIID, void **aResult) { nsresult rv; nsDocLoaderImpl* inst; // Parameter validation... if (NULL == aResult) { rv = NS_ERROR_NULL_POINTER; goto done; } // Do not support aggregatable components... *aResult = NULL; if (NULL != aOuter) { rv = NS_ERROR_NO_AGGREGATION; goto done; } if (NULL == gServiceInstance) { // Create a new instance of the component... NS_NEWXPCOM(gServiceInstance, nsDocLoaderImpl); if (NULL == gServiceInstance) { rv = NS_ERROR_OUT_OF_MEMORY; goto done; } NS_ADDREF(gServiceInstance); } // If the QI fails, the component will be destroyed... // // Use a local copy so the NS_RELEASE() will not null the global // pointer... inst = gServiceInstance; NS_ADDREF(inst); rv = inst->QueryInterface(aIID, aResult); NS_RELEASE(inst); done: return rv; } // Entry point to create nsEventQueueService factory instances... nsresult NS_NewDocLoaderServiceFactory(nsIFactory** aResult) { nsresult rv = NS_OK; nsIFactory* inst = new nsDocLoaderServiceFactory(); if (NULL == inst) { rv = NS_ERROR_OUT_OF_MEMORY; } else { NS_ADDREF(inst); } *aResult = inst; return rv; }