extensions/universalchardet/src/xpcom/nsUdetXPCOMWrapper.cpp

   1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* ***** BEGIN LICENSE BLOCK *****
   3  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
   4  *
   5  * The contents of this file are subject to the Mozilla Public License Version
   6  * 1.1 (the "License"); you may not use this file except in compliance with
   7  * the License. You may obtain a copy of the License at
   8  * http://www.mozilla.org/MPL/
   9  *
  10  * Software distributed under the License is distributed on an "AS IS" basis,
  11  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
  12  * for the specific language governing rights and limitations under the
  13  * License.
  14  *
  15  * The Original Code is Mozilla Universal charset detector code.
  16  *
  17  * The Initial Developer of the Original Code is
  18  * Netscape Communications Corporation.
  19  * Portions created by the Initial Developer are Copyright (C) 2001
  20  * the Initial Developer. All Rights Reserved.
  21  *
  22  * Contributor(s):
  23  *          Shy Shalom <shooshX@gmail.com>
  24  *
  25  * Alternatively, the contents of this file may be used under the terms of
  26  * either the GNU General Public License Version 2 or later (the "GPL"), or
  27  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
  28  * in which case the provisions of the GPL or the LGPL are applicable instead
  29  * of those above. If you wish to allow use of your version of this file only
  30  * under the terms of either the GPL or the LGPL, and not to allow others to
  31  * use your version of this file under the terms of the MPL, indicate your
  32  * decision by deleting the provisions above and replace them with the notice
  33  * and other provisions required by the GPL or the LGPL. If you do not delete
  34  * the provisions above, a recipient may use your version of this file under
  35  * the terms of any one of the MPL, the GPL or the LGPL.
  36  *
  37  * ***** END LICENSE BLOCK ***** */
  38
  39 #include "nscore.h"
  40
  41 #include "nsUniversalDetector.h"
  42 #include "nsUdetXPCOMWrapper.h"
  43 #include "nsCharSetProber.h" // for DumpStatus
  44
  45 #include "nsUniversalCharDetDll.h"
  46 //---- for XPCOM
  47 #include "nsIFactory.h"
  48 #include "nsISupports.h"
  49 #include "pratom.h"
  50 #include "prmem.h"
  51 #include "nsCOMPtr.h"
  52
  53 static NS_DEFINE_CID(kUniversalDetectorCID, NS_UNIVERSAL_DETECTOR_CID);
  54 static NS_DEFINE_CID(kUniversalStringDetectorCID, NS_UNIVERSAL_STRING_DETECTOR_CID);
  55
  56 //---------------------------------------------------------------------
  57 nsXPCOMDetector:: nsXPCOMDetector(PRUint32 aLanguageFilter)
  58  : nsUniversalDetector(aLanguageFilter)
  59 {
  60 }
  61 //---------------------------------------------------------------------
  62 nsXPCOMDetector::~nsXPCOMDetector()
  63 {
  64 }
  65 //---------------------------------------------------------------------
  66
  67 NS_IMPL_ISUPPORTS1(nsXPCOMDetector, nsICharsetDetector)
  68
  69 //---------------------------------------------------------------------
  70 NS_IMETHODIMP nsXPCOMDetector::Init(
  71               nsICharsetDetectionObserver* aObserver)
  72 {
  73   NS_ASSERTION(mObserver == nsnull , "Init twice");
  74   if(nsnull == aObserver)
  75     return NS_ERROR_ILLEGAL_VALUE;
  76
  77   mObserver = aObserver;
  78   return NS_OK;
  79 }
  80 //----------------------------------------------------------
  81 NS_IMETHODIMP nsXPCOMDetector::DoIt(const char* aBuf,
  82               PRUint32 aLen, PRBool* oDontFeedMe)
  83 {
  84   NS_ASSERTION(mObserver != nsnull , "have not init yet");
  85
  86   if((nsnull == aBuf) || (nsnull == oDontFeedMe))
  87     return NS_ERROR_ILLEGAL_VALUE;
  88
  89   nsresult rv = this->HandleData(aBuf, aLen);
  90   if (NS_FAILED(rv))
  91     return rv;
  92
  93   if (mDone)
  94   {
  95     if (mDetectedCharset)
  96       Report(mDetectedCharset);
  97
  98     *oDontFeedMe = PR_TRUE;
  99   }
 100   *oDontFeedMe = PR_FALSE;
 101   return NS_OK;
 102 }
 103 //----------------------------------------------------------
 104 NS_IMETHODIMP nsXPCOMDetector::Done()
 105 {
 106   NS_ASSERTION(mObserver != nsnull , "have not init yet");
 107 #ifdef DEBUG_chardet
 108   for (PRInt32 i = 0; i < NUM_OF_CHARSET_PROBERS; i++)
 109   {
 110     // If no data was received the array might stay filled with nulls
 111     // the way it was initialized in the constructor.
 112     if (mCharSetProbers[i])
 113       mCharSetProbers[i]->DumpStatus();
 114   }
 115 #endif
 116
 117   this->DataEnd();
 118   return NS_OK;
 119 }
 120 //----------------------------------------------------------
 121 void nsXPCOMDetector::Report(const char* aCharset)
 122 {
 123   NS_ASSERTION(mObserver != nsnull , "have not init yet");
 124 #ifdef DEBUG_chardet
 125   printf("Universal Charset Detector report charset %s . \r\n", aCharset);
 126 #endif
 127   mObserver->Notify(aCharset, eBestAnswer);
 128 }
 129
 130
 131 //---------------------------------------------------------------------
 132 nsXPCOMStringDetector:: nsXPCOMStringDetector(PRUint32 aLanguageFilter)
 133   : nsUniversalDetector(aLanguageFilter)
 134 {
 135 }
 136 //---------------------------------------------------------------------
 137 nsXPCOMStringDetector::~nsXPCOMStringDetector()
 138 {
 139 }
 140 //---------------------------------------------------------------------
 141 NS_IMPL_ISUPPORTS1(nsXPCOMStringDetector, nsIStringCharsetDetector)
 142 //---------------------------------------------------------------------
 143 void nsXPCOMStringDetector::Report(const char *aCharset)
 144 {
 145   mResult = aCharset;
 146 #ifdef DEBUG_chardet
 147   printf("New Charset Prober report charset %s . \r\n", aCharset);
 148 #endif
 149 }
 150 //---------------------------------------------------------------------
 151 NS_IMETHODIMP nsXPCOMStringDetector::DoIt(const char* aBuf,
 152                      PRUint32 aLen, const char** oCharset,
 153                      nsDetectionConfident &oConf)
 154 {
 155   mResult = nsnull;
 156   this->Reset();
 157   nsresult rv = this->HandleData(aBuf, aLen);
 158   if (NS_FAILED(rv))
 159     return rv;
 160   this->DataEnd();
 161   if (mResult)
 162   {
 163     *oCharset=mResult;
 164     oConf = eBestAnswer;
 165   }
 166   return NS_OK;
 167 }