mirror of
https://github.com/rn10950/RetroZilla.git
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234 lines
8.3 KiB
C++
234 lines
8.3 KiB
C++
/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* 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
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1999
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Pierre Phaneuf <pp@ludusdesign.com>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#include "nsICharsetAlias.h"
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#include "nsXMLEncodingObserver.h"
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#include "nsIXMLEncodingService.h"
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#include "nsIElementObserver.h"
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#include "nsIObserver.h"
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#include "nsIObserverService.h"
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#include "nsISupports.h"
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#include "nsCRT.h"
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#include "nsIParser.h"
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#include "pratom.h"
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#include "nsCharDetDll.h"
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#include "nsIServiceManager.h"
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#include "nsObserverBase.h"
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#include "nsWeakReference.h"
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#include "nsReadableUtils.h"
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#include "nsUnicharUtils.h"
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static NS_DEFINE_CID(kCharsetAliasCID, NS_CHARSETALIAS_CID);
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static const eHTMLTags gTags[] =
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{ eHTMLTag_instruction,
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eHTMLTag_unknown
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};
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//-------------------------------------------------------------------------
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nsXMLEncodingObserver::nsXMLEncodingObserver()
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{
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bXMLEncodingObserverStarted = PR_FALSE;
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}
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//-------------------------------------------------------------------------
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nsXMLEncodingObserver::~nsXMLEncodingObserver()
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{
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// call to end the ObserverService
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if (bXMLEncodingObserverStarted == PR_TRUE) {
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End();
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}
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}
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//-------------------------------------------------------------------------
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NS_IMPL_ADDREF ( nsXMLEncodingObserver )
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NS_IMPL_RELEASE ( nsXMLEncodingObserver )
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// Use the new scheme
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NS_IMPL_QUERY_INTERFACE4(nsXMLEncodingObserver,
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nsIElementObserver,
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nsIObserver,
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nsIXMLEncodingService,
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nsISupportsWeakReference)
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//-------------------------------------------------------------------------
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NS_IMETHODIMP nsXMLEncodingObserver::Notify(
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PRUint32 aDocumentID,
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const PRUnichar* aTag,
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PRUint32 numOfAttributes,
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const PRUnichar* nameArray[],
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const PRUnichar* valueArray[])
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{
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if(!nsDependentString(aTag).LowerCaseEqualsLiteral("?xml"))
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return NS_ERROR_ILLEGAL_VALUE;
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else
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return Notify(aDocumentID, numOfAttributes, nameArray, valueArray);
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}
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//-------------------------------------------------------------------------
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NS_IMETHODIMP nsXMLEncodingObserver::Notify(
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PRUint32 aDocumentID,
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eHTMLTags aTag,
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PRUint32 numOfAttributes,
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const PRUnichar* nameArray[],
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const PRUnichar* valueArray[])
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{
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if(eHTMLTag_meta != aTag)
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return NS_ERROR_ILLEGAL_VALUE;
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else
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return Notify(aDocumentID, numOfAttributes, nameArray, valueArray);
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}
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//-------------------------------------------------------------------------
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NS_IMETHODIMP nsXMLEncodingObserver::Notify(
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PRUint32 aDocumentID,
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PRUint32 numOfAttributes,
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const PRUnichar* nameArray[],
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const PRUnichar* valueArray[])
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{
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nsresult res = NS_OK;
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PRUint32 i;
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if(numOfAttributes >= 3)
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{
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PRBool bGotCurrentCharset=PR_FALSE;
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PRBool bGotCurrentCharsetSource = PR_FALSE;
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PRBool bGotEncoding = PR_FALSE;
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nsCAutoString currentCharset(NS_LITERAL_CSTRING("unknown"));
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nsAutoString charsetSourceStr(NS_LITERAL_STRING("unknown"));
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nsCAutoString encoding(NS_LITERAL_CSTRING("unknown"));
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for(i=0; i < numOfAttributes; i++)
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{
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if(0==nsCRT::strcmp(nameArray[i], NS_LITERAL_STRING("charset").get()))
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{
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bGotCurrentCharset = PR_TRUE;
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CopyUCS2toASCII(nsDependentString(valueArray[i]), currentCharset);
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} else if(0==nsCRT::strcmp(nameArray[i], NS_LITERAL_STRING("charsetSource").get())) {
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bGotCurrentCharsetSource = PR_TRUE;
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charsetSourceStr = valueArray[i];
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} else if(nsDependentString(nameArray[i]).LowerCaseEqualsLiteral("encoding")) {
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bGotEncoding = PR_TRUE;
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CopyUCS2toASCII(nsDependentString(valueArray[i]), encoding);
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}
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}
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// if we cannot find currentCharset or currentCharsetSource
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// return error.
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if( ! (bGotCurrentCharset && bGotCurrentCharsetSource))
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{
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return NS_ERROR_ILLEGAL_VALUE;
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}
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PRInt32 err;
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PRInt32 charsetSourceInt = charsetSourceStr.ToInteger(&err);
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// if we cannot convert the string into PRInt32, return error
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if(NS_FAILED(err))
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return NS_ERROR_ILLEGAL_VALUE;
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PRInt32 currentCharsetSource = charsetSourceInt;
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if(kCharsetFromMetaTag > currentCharsetSource)
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{
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if(! encoding.Equals(currentCharset))
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{
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nsCOMPtr<nsICharsetAlias> calias = do_GetService(kCharsetAliasCID, &res);
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if(NS_SUCCEEDED(res) && (nsnull != calias) )
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{
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PRBool same = PR_FALSE;
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res = calias->Equals( encoding, currentCharset, &same);
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if(NS_SUCCEEDED(res) && (! same))
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{
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nsCAutoString preferred;
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res = calias->GetPreferred(encoding,
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preferred);
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if(NS_SUCCEEDED(res))
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{
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res = NotifyWebShell(0,0, preferred.get(), kCharsetFromMetaTag );
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return res;
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} // if check for GetPreferred
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} // if check res for Equals
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} // if check res for GetService
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} // if Equals
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} // if
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} // if
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return NS_OK;
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}
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//-------------------------------------------------------------------------
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NS_IMETHODIMP nsXMLEncodingObserver::Observe(nsISupports*, const char*, const PRUnichar*)
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{
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return NS_ERROR_NOT_IMPLEMENTED;
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}
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//-------------------------------------------------------------------------
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NS_IMETHODIMP nsXMLEncodingObserver::Start()
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{
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nsresult res = NS_OK;
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if (bXMLEncodingObserverStarted == PR_TRUE)
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return res;
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nsCOMPtr<nsIObserverService> anObserverService = do_GetService("@mozilla.org/observer-service;1", &res);
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if (NS_SUCCEEDED(res)) {
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res = anObserverService->AddObserver(this, "xmlparser", PR_TRUE);
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bXMLEncodingObserverStarted = PR_TRUE;
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}
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return res;
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}
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//-------------------------------------------------------------------------
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NS_IMETHODIMP nsXMLEncodingObserver::End()
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{
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nsresult res = NS_OK;
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if (bXMLEncodingObserverStarted == PR_FALSE)
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return res;
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nsCOMPtr<nsIObserverService> anObserverService = do_GetService("@mozilla.org/observer-service;1", &res);
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if (NS_SUCCEEDED(res)) {
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res = anObserverService->RemoveObserver(this, "xmlparser");
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bXMLEncodingObserverStarted = PR_FALSE;
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}
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return res;
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}
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