зеркало из https://github.com/mozilla/gecko-dev.git
235 строки
8.4 KiB
C++
235 строки
8.4 KiB
C++
/* -*- Mode: C++; tab-width: 3; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Mozilla 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/MPL/
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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 the Mozilla browser.
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*
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* The Initial Developer of the Original Code is Netscape
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* Communications, Inc. Portions created by Netscape are
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* Copyright (C) 1999, Mozilla. All Rights Reserved.
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*
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* Contributor(s):
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* Travis Bogard <travis@netscape.com>
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*/
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#include "nsDocShell.h"
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#include "nsDSURIContentListener.h"
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#include "nsIChannel.h"
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//*****************************************************************************
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//*** nsDSURIContentListener: Object Management
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//*****************************************************************************
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nsDSURIContentListener::nsDSURIContentListener() : mDocShell(nsnull),
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mParentContentListener(nsnull)
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{
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NS_INIT_REFCNT();
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}
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nsDSURIContentListener::~nsDSURIContentListener()
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{
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}
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//*****************************************************************************
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// nsDSURIContentListener::nsISupports
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//*****************************************************************************
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NS_IMPL_THREADSAFE_ADDREF(nsDSURIContentListener)
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NS_IMPL_THREADSAFE_RELEASE(nsDSURIContentListener)
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NS_INTERFACE_MAP_BEGIN(nsDSURIContentListener)
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NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIURIContentListener)
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NS_INTERFACE_MAP_ENTRY(nsIURIContentListener)
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NS_INTERFACE_MAP_END
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//*****************************************************************************
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// nsDSURIContentListener::nsIURIContentListener
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//*****************************************************************************
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NS_IMETHODIMP nsDSURIContentListener::OnStartURIOpen(nsIURI* aURI,
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const char* aWindowTarget, PRBool* aAbortOpen)
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{
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if(mParentContentListener)
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return mParentContentListener->OnStartURIOpen(aURI, aWindowTarget,
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aAbortOpen);
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return NS_OK;
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}
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NS_IMETHODIMP nsDSURIContentListener::GetProtocolHandler(nsIURI* aURI,
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nsIProtocolHandler** aProtocolHandler)
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{
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NS_ENSURE_ARG_POINTER(aProtocolHandler);
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NS_ENSURE_ARG(aURI);
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if(mParentContentListener)
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return mParentContentListener->GetProtocolHandler(aURI, aProtocolHandler);
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else
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*aProtocolHandler = nsnull;
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return NS_OK;
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}
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NS_IMETHODIMP nsDSURIContentListener::DoContent(const char* aContentType,
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nsURILoadCommand aCommand, const char* aWindowTarget,
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nsIChannel* aOpenedChannel, nsIStreamListener** aContentHandler,
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PRBool* aAbortProcess)
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{
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NS_ENSURE_ARG_POINTER(aContentHandler);
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if(aAbortProcess)
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*aAbortProcess = PR_FALSE;
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// determine if the channel has just been retargeted to us...
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nsLoadFlags loadAttribs = 0;
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aOpenedChannel->GetLoadAttributes(&loadAttribs);
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PRUint32 loadType = mDocShell->ConvertDocShellLoadInfoToLoadType((nsDocShellInfoLoadType) aCommand);
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mDocShell->SetLoadType(loadType);
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if(loadAttribs & nsIChannel::LOAD_RETARGETED_DOCUMENT_URI)
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{
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mDocShell->StopLoad();
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}
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nsresult rv = mDocShell->CreateContentViewer(aContentType,
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aOpenedChannel, aContentHandler);
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if (NS_FAILED(rv)) return NS_ERROR_FAILURE; // it's okay if we don't know how to handle the content
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if(loadAttribs & nsIChannel::LOAD_RETARGETED_DOCUMENT_URI)
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mDocShell->SetFocus();
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return NS_OK;
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}
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NS_IMETHODIMP nsDSURIContentListener::IsPreferred(const char* aContentType,
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nsURILoadCommand aCommand, const char* aWindowTarget, char ** aDesiredContentType, PRBool* aCanHandle)
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{
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NS_ENSURE_ARG_POINTER(aCanHandle);
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NS_ENSURE_ARG_POINTER(aDesiredContentType);
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// the docshell has no idea if it is the preferred content provider or not.
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// It needs to ask it's parent if it is the preferred content handler or not...
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if(mParentContentListener)
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return mParentContentListener->IsPreferred(aContentType, aCommand,
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aWindowTarget, aDesiredContentType, aCanHandle);
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else
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{
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// we used to return false here if we didn't have a parent properly registered at the top of
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// the docshell hierarchy to dictate what content types this docshell should be a preferred handler for.
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// But this really makes it hard for developers using iframe or browser tags because then they need to
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// make sure they implement nsIURIContentListener otherwise all link clicks would get sent to another window
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// because we said we weren't the preferred handler type. I'm going to change the default now...if we can handle the
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// content, and someone didn't EXPLICITLY set a nsIURIContentListener at the top of our docshell chain, then we'll
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// now always attempt to process the content ourselves...
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return CanHandleContent(aContentType, aCommand, aWindowTarget, aDesiredContentType, aCanHandle);
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}
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return NS_OK;
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}
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NS_IMETHODIMP nsDSURIContentListener::CanHandleContent(const char* aContentType,
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nsURILoadCommand aCommand, const char* aWindowTarget, char ** aDesiredContentType, PRBool* aCanHandleContent)
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{
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NS_ENSURE_ARG_POINTER(aCanHandleContent);
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NS_ENSURE_ARG_POINTER(aDesiredContentType);
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// this implementation should be the same for all webshell's so no need to pass it up the chain...
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// although I suspect if aWindowTarget has a value, we will need to pass it up the chain in order to find
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// the desired window target.
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// a webshell can handle the following types. Eventually I think we want to get this information
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// from the registry and in addition, we want to
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// incoming Type Preferred type
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// text/html
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// text/xul
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// text/rdf
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// text/xml
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// text/css
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// image/gif
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// image/jpeg
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// image/png
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// image/tiff
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// application/http-index-format
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// message/rfc822 text/xul
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if (aContentType)
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{
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// (1) list all content types we want to be the primary handler for....
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// and suggest a desired content type if appropriate...
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if (nsCRT::strcasecmp(aContentType, "text/html") == 0
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|| nsCRT::strcasecmp(aContentType, "text/xul") == 0
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|| nsCRT::strcasecmp(aContentType, "text/rdf") == 0
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|| nsCRT::strcasecmp(aContentType, "text/xml") == 0
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|| nsCRT::strcasecmp(aContentType, "text/css") == 0
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|| nsCRT::strcasecmp(aContentType, "image/gif") == 0
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|| nsCRT::strcasecmp(aContentType, "image/jpeg") == 0
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|| nsCRT::strcasecmp(aContentType, "image/png") == 0
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|| nsCRT::strcasecmp(aContentType, "text/plain") == 0
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|| nsCRT::strcasecmp(aContentType, "image/tiff") == 0
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|| nsCRT::strcasecmp(aContentType, "application/http-index-format") == 0)
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*aCanHandleContent = PR_TRUE;
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}
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else
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*aCanHandleContent = PR_FALSE;
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// we may need to ask the plugin manager for this webshell if it can handle the content type too...
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return NS_OK;
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}
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NS_IMETHODIMP
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nsDSURIContentListener::GetLoadCookie(nsISupports ** aLoadCookie)
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{
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return mDocShell->GetLoadCookie(aLoadCookie);
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}
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NS_IMETHODIMP
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nsDSURIContentListener::SetLoadCookie(nsISupports * aLoadCookie)
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{
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return mDocShell->SetLoadCookie(aLoadCookie);
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}
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NS_IMETHODIMP
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nsDSURIContentListener::GetParentContentListener(nsIURIContentListener**
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aParentListener)
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{
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*aParentListener = mParentContentListener;
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NS_IF_ADDREF(*aParentListener);
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return NS_OK;
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}
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NS_IMETHODIMP
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nsDSURIContentListener::SetParentContentListener(nsIURIContentListener*
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aParentListener)
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{
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// Weak Reference, don't addref
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mParentContentListener = aParentListener;
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return NS_OK;
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}
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//*****************************************************************************
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// nsDSURIContentListener: Helpers
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//*****************************************************************************
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//*****************************************************************************
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// nsDSURIContentListener: Accessors
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//*****************************************************************************
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void nsDSURIContentListener::DocShell(nsDocShell* aDocShell)
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{
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mDocShell = aDocShell;
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}
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nsDocShell* nsDSURIContentListener::DocShell()
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{
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return mDocShell;
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}
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