зеркало из https://github.com/mozilla/pjs.git
848 строки
30 KiB
C++
848 строки
30 KiB
C++
/* -*- Mode: C++; tab-width: 2; 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) 1999 Netscape Communications Corporation. All
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* Rights Reserved.
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*
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* Contributor(s):
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*/
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#include "nsURILoader.h"
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#include "nsIURIContentListener.h"
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#include "nsIContentHandler.h"
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#include "nsILoadGroup.h"
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#include "nsIDocumentLoader.h"
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#include "nsIWebProgress.h"
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#include "nsIWebProgressListener.h"
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#include "nsIIOService.h"
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#include "nsIServiceManager.h"
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#include "nsIStreamListener.h"
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#include "nsIURI.h"
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#include "nsIChannel.h"
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#include "nsIInterfaceRequestor.h"
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#include "nsIProgressEventSink.h"
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#include "nsIInputStream.h"
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#include "nsIStreamConverterService.h"
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#include "nsWeakReference.h"
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#include "nsIHTTPChannel.h"
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#include "nsIDocShellTreeItem.h"
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#include "nsIDocShellTreeOwner.h"
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#include "nsVoidArray.h"
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#include "nsXPIDLString.h"
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#include "nsString.h"
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#include "nsIDOMWindow.h"
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#include "nsIUnkContentTypeHandler.h"
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#include "nsDOMError.h"
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#include "nsCExternalHandlerService.h" // contains progids for the helper app service
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static NS_DEFINE_CID(kURILoaderCID, NS_URI_LOADER_CID);
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static NS_DEFINE_CID(kStreamConverterServiceCID, NS_STREAMCONVERTERSERVICE_CID);
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/*
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* The nsDocumentOpenInfo contains the state required when a single document
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* is being opened in order to discover the content type... Each instance remains alive until its target URL has
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* been loaded (or aborted).
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*
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*/
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class nsDocumentOpenInfo : public nsIStreamListener
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{
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public:
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nsDocumentOpenInfo();
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nsresult Init(nsISupports * aRetargetedWindowContext,
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nsISupports * aOriginalWindowContext);
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NS_DECL_ISUPPORTS
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nsresult Open(nsIChannel * aChannel,
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nsURILoadCommand aCommand,
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const char * aWindowTarget,
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nsISupports * aWindowContext);
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nsresult DispatchContent(nsIChannel * aChannel, nsISupports * aCtxt);
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nsresult RetargetOutput(nsIChannel * aChannel, const char * aSrcContentType,
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const char * aOutContentType, nsIStreamListener * aStreamListener);
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// nsIStreamObserver methods:
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NS_DECL_NSISTREAMOBSERVER
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// nsIStreamListener methods:
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NS_DECL_NSISTREAMLISTENER
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protected:
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virtual ~nsDocumentOpenInfo();
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nsDocumentOpenInfo* Clone();
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// ProcessCanceledCase will do a couple of things....(1) it checks to see if the channel was canceled,
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// if it was, it will go out and release all of the document open info's local state for this load
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// and it will return TRUE.
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PRBool ProcessCanceledCase(nsIChannel * aChannel);
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nsresult InvokeUnknownContentHandler(nsIChannel * aChannel, const char * aContentType, nsIDOMWindow * aDomWindow);
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protected:
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nsCOMPtr<nsIURIContentListener> m_contentListener;
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nsCOMPtr<nsIStreamListener> m_targetStreamListener;
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nsCOMPtr<nsISupports> m_originalContext;
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nsURILoadCommand mCommand;
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nsCString m_windowTarget;
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PRBool mOnStopFired;
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};
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NS_IMPL_THREADSAFE_ADDREF(nsDocumentOpenInfo);
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NS_IMPL_THREADSAFE_RELEASE(nsDocumentOpenInfo);
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NS_INTERFACE_MAP_BEGIN(nsDocumentOpenInfo)
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NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIStreamObserver)
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NS_INTERFACE_MAP_ENTRY(nsIStreamObserver)
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NS_INTERFACE_MAP_ENTRY(nsIStreamListener)
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NS_INTERFACE_MAP_END_THREADSAFE
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nsDocumentOpenInfo::nsDocumentOpenInfo()
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: mOnStopFired (PR_FALSE)
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{
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NS_INIT_ISUPPORTS();
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}
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nsDocumentOpenInfo::~nsDocumentOpenInfo()
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{
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}
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nsresult nsDocumentOpenInfo::Init(nsISupports * aCurrentWindowContext,
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nsISupports * aOriginalWindowContext)
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{
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// ask the window context if it has a uri content listener...
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nsresult rv = NS_OK;
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m_contentListener = do_GetInterface(aCurrentWindowContext, &rv);
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m_originalContext = aOriginalWindowContext;
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return rv;
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}
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nsDocumentOpenInfo* nsDocumentOpenInfo::Clone()
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{
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nsDocumentOpenInfo* newObject;
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newObject = new nsDocumentOpenInfo();
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if (newObject) {
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newObject->m_contentListener = m_contentListener;
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newObject->mCommand = mCommand;
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newObject->m_windowTarget = m_windowTarget;
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newObject->m_originalContext = m_originalContext;
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}
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return newObject;
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}
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// ProcessCanceledCase will do a couple of things....(1) it checks to see if the channel was canceled,
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// if it was, it will go out and release all of the document open info's local state for this load
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// and it will return TRUE.
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PRBool nsDocumentOpenInfo::ProcessCanceledCase(nsIChannel * aChannel)
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{
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PRBool canceled = PR_FALSE;
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nsresult rv = NS_OK;
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if (aChannel)
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{
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aChannel->GetStatus(&rv);
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if (rv == NS_BINDING_ABORTED)
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{
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canceled = PR_TRUE;
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// free any local state for this load since we are aborting it so we
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// can break any cycles...
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m_contentListener = nsnull;
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m_targetStreamListener = nsnull;
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m_originalContext = nsnull;
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}
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}
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return canceled;
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}
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nsresult nsDocumentOpenInfo::Open(nsIChannel * aChannel,
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nsURILoadCommand aCommand,
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const char * aWindowTarget,
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nsISupports * aWindowContext)
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{
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// this method is not complete!!! Eventually, we should first go
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// to the content listener and ask them for a protocol handler...
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// if they don't give us one, we need to go to the registry and get
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// the preferred protocol handler.
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// But for now, I'm going to let necko do the work for us....
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nsresult rv = NS_OK;
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// store any local state
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m_windowTarget = aWindowTarget;
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mCommand = aCommand;
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// now just open the channel!
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if (aChannel)
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rv = aChannel->AsyncRead(this, nsnull);
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if (rv == NS_ERROR_DOM_RETVAL_UNDEFINED) {
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NS_WARNING("js returned no result -- not replacing window contents");
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rv = NS_OK;
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}
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return rv;
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}
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NS_IMETHODIMP nsDocumentOpenInfo::OnStartRequest(nsIChannel * aChannel, nsISupports * aCtxt)
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{
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nsresult rv = NS_OK;
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//
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// Deal with "special" HTTP responses:
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//
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// - In the case of a 204 (No Content) response, do not try to find a
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// content handler. Just return. This causes the request to be
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// ignored.
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//
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nsCOMPtr<nsIHTTPChannel> httpChannel(do_QueryInterface(aChannel, &rv));
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if (NS_SUCCEEDED(rv)) {
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PRUint32 responseCode = 0;
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httpChannel->GetResponseStatus(&responseCode);
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if (204 == responseCode) {
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return NS_OK;
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}
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}
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if (ProcessCanceledCase(aChannel))
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return NS_OK;
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rv = DispatchContent(aChannel, aCtxt);
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if (m_targetStreamListener)
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rv = m_targetStreamListener->OnStartRequest(aChannel, aCtxt);
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return rv;
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}
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NS_IMETHODIMP nsDocumentOpenInfo::OnDataAvailable(nsIChannel * aChannel, nsISupports * aCtxt,
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nsIInputStream * inStr, PRUint32 sourceOffset, PRUint32 count)
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{
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// if we have retarged to the end stream listener, then forward the call....
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// otherwise, don't do anything
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nsresult rv = NS_OK;
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if (ProcessCanceledCase(aChannel))
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return NS_OK;
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if (m_targetStreamListener)
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rv = m_targetStreamListener->OnDataAvailable(aChannel, aCtxt, inStr, sourceOffset, count);
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return rv;
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}
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NS_IMETHODIMP nsDocumentOpenInfo::OnStopRequest(nsIChannel * aChannel, nsISupports *aCtxt,
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nsresult aStatus, const PRUnichar * errorMsg)
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{
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nsresult rv = NS_OK;
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if (ProcessCanceledCase(aChannel))
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return NS_OK;
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if (!mOnStopFired && m_targetStreamListener)
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{
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mOnStopFired = PR_TRUE;
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m_targetStreamListener->OnStopRequest(aChannel, aCtxt, aStatus, errorMsg);
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}
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m_targetStreamListener = 0;
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return rv;
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}
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nsresult nsDocumentOpenInfo::DispatchContent(nsIChannel * aChannel, nsISupports * aCtxt)
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{
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nsresult rv;
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nsXPIDLCString contentType;
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nsCOMPtr<nsISupports> originalWindowContext = m_originalContext; // local variable to keep track of this.
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nsCOMPtr<nsIStreamListener> contentStreamListener;
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rv = aChannel->GetContentType(getter_Copies(contentType));
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if (NS_FAILED(rv)) return rv;
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// go to the uri dispatcher and give them our stuff...
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NS_WITH_SERVICE(nsIURILoader, pURILoader, kURILoaderCID, &rv);
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if (NS_SUCCEEDED(rv))
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{
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nsCOMPtr<nsIURIContentListener> contentListener;
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nsXPIDLCString desiredContentType;
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//
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// First step: See if any nsIURIContentListener prefers to handle this
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// content type.
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//
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PRBool abortDispatch = PR_FALSE;
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rv = pURILoader->DispatchContent(contentType, mCommand, m_windowTarget,
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aChannel, aCtxt,
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m_contentListener,
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m_originalContext,
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getter_Copies(desiredContentType),
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getter_AddRefs(contentListener),
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&abortDispatch);
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// if the uri loader says to abort the dispatch then someone
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// else must have stepped in and taken over for us...so stop..
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if (abortDispatch) return NS_OK;
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//
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// Second step: If no listener prefers this type, see if any stream
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// decoders exist to transform this content type into
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// some other.
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//
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if (!contentListener)
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{
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rv = RetargetOutput(aChannel, contentType, "*/*", nsnull);
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if (m_targetStreamListener)
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return NS_OK;
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}
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//
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// Step 3:
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//
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// BIG TIME HACK ALERT!!!!! WE NEED THIS HACK IN PLACE UNTIL OUR NEW UNKNOWN CONTENT
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// HANDLER COMES ONLINE!!!
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// Until that day, if we couldn't find a handler for the content type, then go back to the listener who
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// originated the url request and force them to handle the content....this forces us through the old code
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// path for unknown content types which brings up the file save as dialog...
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if (!contentListener) {
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contentListener = m_contentListener;
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}
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//
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// Good news! Some content listener can handle this content type.
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//
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if (contentListener)
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{
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PRBool bAbortProcess = PR_FALSE;
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nsCAutoString contentTypeToUse;
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if (desiredContentType)
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contentTypeToUse.Assign(desiredContentType);
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else
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contentTypeToUse.Assign(contentType);
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// We need to first figure out if we are retargeting the load to a content listener
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// that is different from the one that originated the request....if so, set
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// LOAD_RETARGETED_DOCUMENT_URI on the channel.
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if (contentListener.get() != m_contentListener.get())
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{
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// we must be retargeting...so set an appropriate flag on the channel
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nsLoadFlags loadAttribs = 0;
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aChannel->GetLoadAttributes(&loadAttribs);
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loadAttribs |= nsIChannel::LOAD_RETARGETED_DOCUMENT_URI;
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aChannel->SetLoadAttributes(loadAttribs);
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}
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rv = contentListener->DoContent(contentTypeToUse, mCommand, m_windowTarget,
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aChannel, getter_AddRefs(contentStreamListener),
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&bAbortProcess);
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// the listener is doing all the work from here...we are done!!!
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if (bAbortProcess) return rv;
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// BEFORE we fail and bring up the unknown content handler dialog...
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// try to detect if there is a helper application we an use instead...
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if (mCommand == nsIURILoader::viewUserClick && !contentStreamListener)
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{
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nsCOMPtr<nsIURI> uri;
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PRBool abortProcess = PR_FALSE;
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aChannel->GetURI(getter_AddRefs(uri));
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nsCOMPtr<nsIStreamListener> contentStreamListener;
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nsCOMPtr<nsIExternalHelperAppService> helperAppService (do_GetService(NS_EXTERNALHELPERAPPSERVICE_PROGID));
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if (helperAppService)
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{
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rv = helperAppService->DoContent(contentType, uri, m_originalContext, &abortProcess, getter_AddRefs(contentStreamListener));
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if (NS_SUCCEEDED(rv) && contentStreamListener)
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return RetargetOutput(aChannel, contentType, contentType, contentStreamListener);
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}
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rv = NS_ERROR_FAILURE; // this will cause us to bring up the unknown content handler dialog.
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}
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if (NS_FAILED(rv))
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{
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nsCOMPtr<nsIDOMWindow> domWindow (do_GetInterface(originalWindowContext));
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return InvokeUnknownContentHandler(aChannel, contentType, domWindow);
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}
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// okay, all registered listeners have had a chance to handle this content...
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// did one of them give us a stream listener back? if so, let's start reading data
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// into it...
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rv = RetargetOutput(aChannel, contentType, desiredContentType, contentStreamListener);
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m_originalContext = nsnull; // we don't need this anymore....
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}
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}
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return rv;
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}
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nsresult nsDocumentOpenInfo::InvokeUnknownContentHandler(nsIChannel * aChannel, const char * aContentType, nsIDOMWindow * aDomWindow)
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{
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NS_ENSURE_ARG(aChannel);
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NS_ENSURE_ARG(aDomWindow);
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nsCOMPtr<nsIUnknownContentTypeHandler> handler (do_GetService(NS_IUNKNOWNCONTENTTYPEHANDLER_PROGID));
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NS_ENSURE_TRUE(handler, NS_ERROR_FAILURE);
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return handler->HandleUnknownContentType( aChannel, aContentType, aDomWindow );
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}
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nsresult nsDocumentOpenInfo::RetargetOutput(nsIChannel * aChannel, const char * aSrcContentType, const char * aOutContentType,
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nsIStreamListener * aStreamListener)
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{
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nsresult rv = NS_OK;
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// catch the case when some joker server sends back a content type of "*/*"
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// because we said we could handle "*/*" in our accept headers
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if (aOutContentType && *aOutContentType && nsCRT::strcasecmp(aSrcContentType, aOutContentType) && nsCRT::strcmp(aSrcContentType, "*/*"))
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{
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NS_WITH_SERVICE(nsIStreamConverterService, StreamConvService, kStreamConverterServiceCID, &rv);
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if (NS_FAILED(rv)) return rv;
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nsAutoString from_w; from_w.AssignWithConversion (aSrcContentType);
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nsAutoString to_w; to_w.AssignWithConversion (aOutContentType);
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nsDocumentOpenInfo* nextLink;
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// When applying stream decoders, it is necessary to "insert" an
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// intermediate nsDocumentOpenInfo instance to handle the targeting of
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// the "final" stream or streams.
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//
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// For certain content types (ie. multi-part/x-mixed-replace) the input
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// stream is split up into multiple destination streams. This
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// intermediate instance is used to target these "decoded" streams...
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//
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nextLink = Clone();
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if (!nextLink) return NS_ERROR_OUT_OF_MEMORY;
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NS_ADDREF(nextLink);
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// Set up the final destination listener.
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nextLink->m_targetStreamListener = nsnull;
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// The following call binds this channelListener's mNextListener (typically
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// the nsDocumentBindInfo) to the underlying stream converter, and returns
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// the underlying stream converter which we then set to be this channelListener's
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// mNextListener. This effectively nestles the stream converter down right
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// in between the raw stream and the final listener.
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rv = StreamConvService->AsyncConvertData(from_w.GetUnicode(),
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to_w.GetUnicode(),
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nextLink,
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aChannel,
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getter_AddRefs(m_targetStreamListener));
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NS_RELEASE(nextLink);
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}
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else
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m_targetStreamListener = aStreamListener; // no converter necessary so use a direct pipe
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return rv;
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}
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///////////////////////////////////////////////////////////////////////////////////////////////
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// Implementation of nsURILoader
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///////////////////////////////////////////////////////////////////////////////////////////////
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nsURILoader::nsURILoader()
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{
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NS_INIT_ISUPPORTS();
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m_listeners = new nsVoidArray();
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}
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nsURILoader::~nsURILoader()
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{
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if (m_listeners)
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delete m_listeners;
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}
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NS_IMPL_ADDREF(nsURILoader);
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NS_IMPL_RELEASE(nsURILoader);
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NS_INTERFACE_MAP_BEGIN(nsURILoader)
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NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIURILoader)
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NS_INTERFACE_MAP_ENTRY(nsIURILoader)
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NS_INTERFACE_MAP_END
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NS_IMETHODIMP nsURILoader::RegisterContentListener(nsIURIContentListener * aContentListener)
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{
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nsresult rv = NS_OK;
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if (m_listeners)
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m_listeners->AppendElement(aContentListener);
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else
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rv = NS_ERROR_FAILURE;
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return rv;
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}
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NS_IMETHODIMP nsURILoader::UnRegisterContentListener(nsIURIContentListener * aContentListener)
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{
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if (m_listeners)
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m_listeners->RemoveElement(aContentListener);
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return NS_OK;
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}
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NS_IMETHODIMP nsURILoader::OpenURI(nsIChannel * aChannel,
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nsURILoadCommand aCommand,
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const char * aWindowTarget,
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nsISupports * aWindowContext)
|
|
{
|
|
return OpenURIVia(aChannel, aCommand, aWindowTarget, aWindowContext, 0 /* ip address */);
|
|
}
|
|
|
|
NS_IMETHODIMP nsURILoader::GetTarget(const char * aWindowTarget,
|
|
nsISupports * aWindowContext,
|
|
nsISupports ** aRetargetedWindowContext)
|
|
{
|
|
nsAutoString name; name.AssignWithConversion(aWindowTarget);
|
|
nsCOMPtr<nsIDocShellTreeItem> windowCtxtAsTreeItem (do_GetInterface(aWindowContext));
|
|
nsCOMPtr<nsIDocShellTreeItem> treeItem;
|
|
*aRetargetedWindowContext = nsnull;
|
|
|
|
if(!name.Length() || name.EqualsIgnoreCase("_self") || name.EqualsIgnoreCase("_blank"))
|
|
{
|
|
*aRetargetedWindowContext = aWindowContext;
|
|
}
|
|
else if(name.EqualsIgnoreCase("_parent"))
|
|
{
|
|
windowCtxtAsTreeItem->GetSameTypeParent(getter_AddRefs(treeItem));
|
|
if(!treeItem)
|
|
*aRetargetedWindowContext = aWindowContext;
|
|
}
|
|
else if(name.EqualsIgnoreCase("_top"))
|
|
{
|
|
windowCtxtAsTreeItem->GetSameTypeRootTreeItem(getter_AddRefs(treeItem));
|
|
if(!treeItem)
|
|
*aRetargetedWindowContext = aWindowContext;
|
|
}
|
|
else if(name.EqualsIgnoreCase("_content"))
|
|
{
|
|
nsCOMPtr<nsIDocShellTreeOwner> treeOwner;
|
|
windowCtxtAsTreeItem->GetTreeOwner(getter_AddRefs(treeOwner));
|
|
|
|
if (treeOwner)
|
|
treeOwner->FindItemWithName(name.GetUnicode(), nsnull, getter_AddRefs(treeItem));
|
|
else
|
|
{
|
|
NS_ERROR("Someone isn't setting up the tree owner. You might like to try that."
|
|
"Things will.....you know, work.");
|
|
}
|
|
}
|
|
else
|
|
{
|
|
windowCtxtAsTreeItem->FindItemWithName(name.GetUnicode(), nsnull, getter_AddRefs(treeItem));
|
|
}
|
|
|
|
nsCOMPtr<nsISupports> treeItemCtxt (do_QueryInterface(treeItem));
|
|
if (!*aRetargetedWindowContext)
|
|
*aRetargetedWindowContext = treeItemCtxt;
|
|
|
|
NS_IF_ADDREF(*aRetargetedWindowContext);
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP nsURILoader::OpenURIVia(nsIChannel * aChannel,
|
|
nsURILoadCommand aCommand,
|
|
const char * aWindowTarget,
|
|
nsISupports * aOriginalWindowContext,
|
|
PRUint32 aLocalIP)
|
|
{
|
|
// we need to create a DocumentOpenInfo object which will go ahead and open the url
|
|
// and discover the content type....
|
|
|
|
nsresult rv = NS_OK;
|
|
nsDocumentOpenInfo* loader = nsnull;
|
|
|
|
if (!aChannel) return NS_ERROR_NULL_POINTER;
|
|
|
|
// Let the window context's uriListener know that the open is starting. This
|
|
// gives that window a chance to abort the load process.
|
|
nsCOMPtr<nsIURIContentListener> winContextListener(do_GetInterface(aOriginalWindowContext));
|
|
if(winContextListener)
|
|
{
|
|
nsCOMPtr<nsIURI> uri;
|
|
aChannel->GetURI(getter_AddRefs(uri));
|
|
if(uri)
|
|
{
|
|
PRBool doAbort = PR_FALSE;
|
|
winContextListener->OnStartURIOpen(uri, aWindowTarget, &doAbort);
|
|
|
|
if(doAbort)
|
|
return NS_OK;
|
|
}
|
|
}
|
|
|
|
nsCOMPtr<nsISupports> retargetedWindowContext;
|
|
NS_ENSURE_SUCCESS(GetTarget(aWindowTarget, aOriginalWindowContext, getter_AddRefs(retargetedWindowContext)), NS_ERROR_FAILURE);
|
|
|
|
NS_NEWXPCOM(loader, nsDocumentOpenInfo);
|
|
if (!loader) return NS_ERROR_OUT_OF_MEMORY;
|
|
NS_ADDREF(loader);
|
|
|
|
nsCOMPtr<nsIInterfaceRequestor> loadCookie;
|
|
SetupLoadCookie(retargetedWindowContext, getter_AddRefs(loadCookie));
|
|
|
|
loader->Init(retargetedWindowContext, aOriginalWindowContext); // Extra Info
|
|
|
|
// now instruct the loader to go ahead and open the url
|
|
rv = loader->Open(aChannel, aCommand, aWindowTarget, retargetedWindowContext);
|
|
NS_RELEASE(loader);
|
|
|
|
return rv;
|
|
}
|
|
|
|
NS_IMETHODIMP nsURILoader::Stop(nsISupports* aLoadCookie)
|
|
{
|
|
nsresult rv;
|
|
nsCOMPtr<nsIDocumentLoader> docLoader;
|
|
|
|
NS_ENSURE_ARG_POINTER(aLoadCookie);
|
|
|
|
docLoader = do_GetInterface(aLoadCookie, &rv);
|
|
if (docLoader) {
|
|
rv = docLoader->Stop();
|
|
}
|
|
return rv;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsURILoader::GetLoadGroupForContext(nsISupports * aWindowContext,
|
|
nsILoadGroup ** aLoadGroup)
|
|
{
|
|
nsresult rv;
|
|
nsCOMPtr<nsIInterfaceRequestor> loadCookieForWindow;
|
|
|
|
// Initialize the [out] parameter...
|
|
*aLoadGroup= nsnull;
|
|
|
|
NS_ENSURE_ARG(aWindowContext);
|
|
|
|
rv = SetupLoadCookie(aWindowContext, getter_AddRefs(loadCookieForWindow));
|
|
if (NS_FAILED(rv)) return rv;
|
|
|
|
rv = loadCookieForWindow->GetInterface(NS_GET_IID(nsILoadGroup),
|
|
(void **) aLoadGroup);
|
|
return rv;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsURILoader::GetDocumentLoaderForContext(nsISupports * aWindowContext,
|
|
nsIDocumentLoader ** aDocLoader)
|
|
{
|
|
nsresult rv;
|
|
nsCOMPtr<nsIInterfaceRequestor> loadCookieForWindow;
|
|
|
|
// Initialize the [out] parameter...
|
|
*aDocLoader = nsnull;
|
|
|
|
NS_ENSURE_ARG(aWindowContext);
|
|
|
|
rv = SetupLoadCookie(aWindowContext, getter_AddRefs(loadCookieForWindow));
|
|
if (NS_FAILED(rv)) return rv;
|
|
|
|
rv = loadCookieForWindow->GetInterface(NS_GET_IID(nsIDocumentLoader),
|
|
(void **) aDocLoader);
|
|
return rv;
|
|
}
|
|
|
|
nsresult nsURILoader::SetupLoadCookie(nsISupports * aWindowContext,
|
|
nsIInterfaceRequestor ** aLoadCookie)
|
|
{
|
|
// first, see if we have already set a load cookie on the cnt listener..
|
|
// i.e. if this isn't the first time we've tried to run a url through this window
|
|
// context then we don't need to create another load cookie, we can reuse the first one.
|
|
nsresult rv = NS_OK;
|
|
nsCOMPtr<nsISupports> loadCookie;
|
|
|
|
// Initialize the [out] parameter...
|
|
*aLoadCookie = nsnull;
|
|
|
|
nsCOMPtr<nsIURIContentListener> cntListener (do_GetInterface(aWindowContext));
|
|
if (cntListener) {
|
|
// Get the load cookie for the requested window context...
|
|
rv = cntListener->GetLoadCookie(getter_AddRefs(loadCookie));
|
|
|
|
//
|
|
// If we don't have a load cookie for this window context yet, then
|
|
// go create one! In order to create a load cookie, we need to get
|
|
// the parent's load cookie if there is one...
|
|
//
|
|
if (!loadCookie) {
|
|
nsCOMPtr<nsIURIContentListener> parentListener;
|
|
nsCOMPtr<nsIDocumentLoader> parentDocLoader;
|
|
nsCOMPtr<nsIDocumentLoader> newDocLoader;
|
|
|
|
// Try to get the parent's load cookie...
|
|
cntListener->GetParentContentListener(getter_AddRefs(parentListener));
|
|
if (parentListener) {
|
|
rv = parentListener->GetLoadCookie(getter_AddRefs(loadCookie));
|
|
|
|
// if we had a parent cookie use it to help with the creation process
|
|
if (loadCookie) {
|
|
parentDocLoader = do_GetInterface(loadCookie);
|
|
}
|
|
}
|
|
// If there is no parent DocLoader, then use the global DocLoader
|
|
// service as the parent...
|
|
if (!parentDocLoader) {
|
|
parentDocLoader = do_GetService(NS_DOCUMENTLOADER_SERVICE_PROGID, &rv);
|
|
}
|
|
if (NS_FAILED(rv)) return rv;
|
|
|
|
//
|
|
// Create a new document loader. The document loader represents
|
|
// the load cookie which the uriloader hands out...
|
|
//
|
|
rv = parentDocLoader->CreateDocumentLoader(getter_AddRefs(newDocLoader));
|
|
if (NS_FAILED(rv)) return rv;
|
|
|
|
newDocLoader->QueryInterface(NS_GET_IID(nsIInterfaceRequestor),
|
|
getter_AddRefs(loadCookie));
|
|
rv = cntListener->SetLoadCookie(loadCookie);
|
|
} // if we don't have a load cookie already
|
|
} // if we have a cntListener
|
|
|
|
// loadCookie may be null - for example, <a target="popupWin"> if popupWin is
|
|
// not a defined window. The following prevents a crash (Bug 32898)
|
|
if (loadCookie) {
|
|
rv = loadCookie->QueryInterface(NS_GET_IID(nsIInterfaceRequestor),
|
|
(void**)aLoadCookie);
|
|
} else {
|
|
rv = NS_ERROR_UNEXPECTED;
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
|
|
PRBool nsURILoader::ShouldHandleContent(nsIURIContentListener * aCntListener,
|
|
const char * aContentType,
|
|
nsURILoadCommand aCommand,
|
|
const char * aWindowTarget,
|
|
char ** aContentTypeToUse)
|
|
{
|
|
PRBool foundContentHandler = PR_FALSE;
|
|
if (aCommand == nsIURILoader::viewUserClick)
|
|
aCntListener->IsPreferred(aContentType, aCommand, aWindowTarget,
|
|
aContentTypeToUse,
|
|
&foundContentHandler);
|
|
else
|
|
aCntListener->CanHandleContent(aContentType, aCommand, aWindowTarget,
|
|
aContentTypeToUse,
|
|
&foundContentHandler);
|
|
return foundContentHandler;
|
|
}
|
|
|
|
NS_IMETHODIMP nsURILoader::DispatchContent(const char * aContentType,
|
|
nsURILoadCommand aCommand,
|
|
const char * aWindowTarget,
|
|
nsIChannel * aChannel,
|
|
nsISupports * aCtxt,
|
|
nsIURIContentListener * aContentListener,
|
|
nsISupports * aSrcWindowContext,
|
|
char ** aContentTypeToUse,
|
|
nsIURIContentListener ** aContentListenerToUse,
|
|
PRBool * aAbortProcess)
|
|
{
|
|
NS_ENSURE_ARG(aContentType);
|
|
NS_ENSURE_ARG(aChannel);
|
|
|
|
// okay, now we've discovered the content type. We need to do the following:
|
|
// (1) We always start with the original content listener (if any) that originated the request
|
|
// and then ask if it can handle the content.
|
|
// (2) if it can't, we'll move on to the registered content listeners and give
|
|
// them a crack at handling the content.
|
|
|
|
// (3) if we cannot find a registered content lister to handle the type, then we move on to
|
|
// phase II which is to try to find a content handler in the registry for the content type.
|
|
// hitting this phase usually means we'll be creating a new window or handing off to an
|
|
// external application.
|
|
|
|
nsresult rv = NS_OK;
|
|
|
|
nsCOMPtr<nsIURIContentListener> listenerToUse = aContentListener;
|
|
PRBool skipRetargetingSearch = PR_FALSE;
|
|
// How do we determine whether we need to ask any registered content listeners if they
|
|
// want a crack at the content?
|
|
// (1) if the window target is blank or new, then we don't want to ask...
|
|
if (!nsCRT::strcasecmp(aWindowTarget, "_blank") || !nsCRT::strcasecmp(aWindowTarget, "_new"))
|
|
skipRetargetingSearch = PR_TRUE;
|
|
else
|
|
{
|
|
// (2) if the original content listener is NULL and we have a target name then we
|
|
// must not be a window open with that target name so skip the content listener search
|
|
// and skip to the part that brings up the new window.
|
|
if (aWindowTarget && *aWindowTarget && !aContentListener)
|
|
skipRetargetingSearch = PR_TRUE;
|
|
}
|
|
|
|
// find a content handler that can and will handle the content
|
|
if (!skipRetargetingSearch)
|
|
{
|
|
PRBool foundContentHandler = PR_FALSE;
|
|
if (listenerToUse)
|
|
foundContentHandler = ShouldHandleContent(listenerToUse, aContentType,
|
|
aCommand, aWindowTarget, aContentTypeToUse);
|
|
|
|
|
|
if (!foundContentHandler) // if it can't handle the content, scan through the list of registered listeners
|
|
{
|
|
PRInt32 i = 0;
|
|
// keep looping until we get a content listener back
|
|
for(i = 0; i < m_listeners->Count() && !foundContentHandler; i++)
|
|
{
|
|
//nsIURIContentListener's aren't refcounted.
|
|
nsIURIContentListener * listener =(nsIURIContentListener*)m_listeners->ElementAt(i);
|
|
if (listener)
|
|
{
|
|
foundContentHandler = ShouldHandleContent(listener, aContentType,
|
|
aCommand, aWindowTarget, aContentTypeToUse);
|
|
if (foundContentHandler)
|
|
listenerToUse = listener;
|
|
}
|
|
} // for loop
|
|
} // if we can't handle the content
|
|
|
|
|
|
if (foundContentHandler && listenerToUse)
|
|
{
|
|
*aContentListenerToUse = listenerToUse;
|
|
NS_IF_ADDREF(*aContentListenerToUse);
|
|
return rv;
|
|
}
|
|
}
|
|
|
|
// no registered content listeners to handle this type!!! so go to the register
|
|
// and get a registered nsIContentHandler for our content type. Hand it off
|
|
// to them...
|
|
// eventually we want to hit up the category manager so we can allow people to
|
|
// over ride the default content type handlers....for now...i'm skipping that part.
|
|
|
|
nsCAutoString handlerProgID (NS_CONTENT_HANDLER_PROGID_PREFIX);
|
|
handlerProgID += aContentType;
|
|
|
|
nsCOMPtr<nsIContentHandler> aContentHandler;
|
|
rv = nsComponentManager::CreateInstance(handlerProgID, nsnull, NS_GET_IID(nsIContentHandler), getter_AddRefs(aContentHandler));
|
|
if (NS_SUCCEEDED(rv)) // we did indeed have a content handler for this type!! yippee...
|
|
{
|
|
rv = aContentHandler->HandleContent(aContentType, "view", aWindowTarget, aSrcWindowContext, aChannel);
|
|
*aAbortProcess = PR_TRUE;
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
|