add new files for PICS and Charset observation, have not change makefile yet

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

/*

 * The contents of this file are subject to the Netscape Public License

 * Version 1.0 (the "NPL")=0; you may not use this file except in

 * compliance with the NPL.  You may obtain a copy of the NPL at

 * http://www.mozilla.org/NPL/

 *

 * Software distributed under the NPL is distributed on an "AS IS" basis,

 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL

 * for the specific language governing rights and limitations under the

 * NPL.

 *

 * The Initial Developer of this code under the NPL is Netscape

 * Communications Corporation.  Portions created by Netscape are

 * Copyright (C) 1999 Netscape Communications Corporation.  All Rights

 * Reserved.

 */

#include "nsCharsetObserver.h"

static NS_DEFINE_IID(kIElementObserverIID, NS_IELEMENTOBSERVER_IID);

static NS_DEFINE_IID(kIObserverIID, NS_IOBSERVER_IID);

static NS_DEFINE_IID(kISupportsIID, NS_ISUPPORTS_IID);

nsCharsetObserver::nsCharsetObserver()

{

  NS_INIT_REFCNT();

}

nsCharsetObserver::~nsCharsetObserver()

{

}

NS_IMPL_ADDREF ( nsCharsetObserver );

NS_IMPL_RELEASE ( nsCharsetObserver );

NS_IMETHODIMP nsCharsetObserver::QueryInterface(REFNSIID aIID, void** aInstancePtr)

{

  if( NULL == aInstancePtr) {

    return NS_ERROR_NULL_POINTER;

  }

  *aInstancePtr = NULL;

  if( aIID.Equals ( kIElementObserverIID )) {

    *aInstancePtr = (void*) ((nsIElementObserver*) this);

    NS_ADDREF_THIS();

    return NS_OK;

  }

  if( aIID.Equals ( kIObserverIID )) {

    *aInstancePtr = (void*) ((nsIObserver*) this);

    NS_ADDREF_THIS();

    return NS_OK;

  }

  if( aIID.Equals ( kISupportsIID )) {

    *aInstancePtr = (void*) (this);

    NS_ADDREF_THIS();

    return NS_OK;

  }

  return NS_NOINTERFACE;

}

NS_IMETHODIMP nsCharsetObserver::GetTagName(nsString& oTag)

{

  oTag = "META";

  return NS_OK;

}

NS_IMETHODIMP nsCharsetObserver::Notify(const nsString& aTag, 

                     PRUint32 numOfAttributes, 

                     const nsString* nameArray, 

                     const nsString* valueArray,

                     PRBool *oContinue)

{

    nsresult res = NS_OK;

    *oContinue = PR_TRUE; // be default, continue

    if(aTag.EqualsIgnoreCase("META")) 

    {

      if((numOfAttributes >= 2) && 

         (nameArray[0].EqualsIgnoreCase("HTTP-EQUIV")) &&

         (valueArray[0].EqualsIgnoreCase("Content-Type")) && 

         (nameArray[1].EqualsIgnoreCase("CONTENT")) ) 

      {

         nsAutoString type;

         valueArray[2].Left(type, 9); // length of "text/html" == 9

         if(type.EqualsIgnoreCase("text/html")) 

         {

            PRInt32 charsetValueStart = valueArray[2].RFind("charset=", PR_TRUE ) ;

            if(kNotFound != charsetValueStart) {	

                  charsetValueStart += 8; // 8 = "charset=".length 

                  PRInt32 charsetValueEnd = valueArray[2].FindCharInSet("\'\";", charsetValueStart  );

                  if(kNotFound == charsetValueEnd ) 

                     charsetValueEnd = valueArray[2].Length();

                  nsAutoString theCharset;

                  valueArray[2].Mid(theCharset, charsetValueStart, charsetValueEnd - charsetValueStart);

                  // XXX 

                  // Get the charest in theCharset

                  // Now, how can we verify the object, if

                  // we pass the object  (nsScanner) when we create this object

                  // then it mean we need to create one nsIElementObserver

                  // for every nsParser object

                  // However, currently we register ourself to a global

                  // nsIObserverService, not to a nsParser. 

             } // if

         } // if

      } // if

    } // if

    return res;

}

NS_IMETHODIMP Notify(nsISupports** result) 

{

    return NS_ERROR_NOT_IMPLEMENTED;

}

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

/*

 * The contents of this file are subject to the Netscape Public License

 * Version 1.0 (the "NPL")=0; you may not use this file except in

 * compliance with the NPL.  You may obtain a copy of the NPL at

 * http://www.mozilla.org/NPL/

 *

 * Software distributed under the NPL is distributed on an "AS IS" basis,

 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL

 * for the specific language governing rights and limitations under the

 * NPL.

 *

 * The Initial Developer of this code under the NPL is Netscape

 * Communications Corporation.  Portions created by Netscape are

 * Copyright (C) 1999 Netscape Communications Corporation.  All Rights

 * Reserved.

 */

#ifndef nsCharsetObserver_h__

#define nsCharsetObserver_h__

#include "nsIElementObserver.h"

#include "nsIObserver.h"

#include "nsISupports.h"

#include "nsString.h"

#include "nsIParser.h"

class nsCharsetObserver: public nsIElementObserver, public nsIObserver {

  NS_DECL_ISUPPORTS

public:

  nsCharsetObserver();

  virtual ~nsCharsetObserver();

  /*

   *   This method return the tag which the observer care about

   */

  NS_IMETHOD GetTagName(nsString& oTag);

  /*

   *   Subject call observer when the parser hit the tag

   *   @param aTag- the tag

   *   @param numOfAttributes - number of attributes

   *   @param nameArray - array of name. 

   *   @param valueArray - array of value

   */

  NS_IMETHOD Notify(const nsString& aTag, PRUint32 numOfAttributes, 

                    const nsString* nameArray, const nsString* valueArray,

                    PRBool* oContinue);

  NS_IMETHOD Notify(nsISupports** result) = 0;

};

#endif /* nsCharsetObserver_h__ */

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

/*

 * The contents of this file are subject to the Netscape Public License

 * Version 1.0 (the "NPL")=0; you may not use this file except in

 * compliance with the NPL.  You may obtain a copy of the NPL at

 * http://www.mozilla.org/NPL/

 *

 * Software distributed under the NPL is distributed on an "AS IS" basis,

 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL

 * for the specific language governing rights and limitations under the

 * NPL.

 *

 * The Initial Developer of this code under the NPL is Netscape

 * Communications Corporation.  Portions created by Netscape are

 * Copyright (C) 1999 Netscape Communications Corporation.  All Rights

 * Reserved.

 */

/**

 * MODULE NOTES:

 * @update  ftang 4/20/99

 * 

 */

#ifndef nsIElementObserver_h__

#define nsIElementObserver_h__

#include "nsISupports.h"

#include "prtypes.h"

class nsString;

// {4672AA04-F6AE-11d2-B3B7-00805F8A6670}

#define NS_IELEMENTOBSERVER_IID      \

{ 0x4672aa04, 0xf6ae, 0x11d2, { 0xb3, 0xb7, 0x0, 0x80, 0x5f, 0x8a, 0x66, 0x70 } }

#define NS_PARSER_SUBJECT "htmlparser"

class nsIElementObserver : public nsISupports {

public:

  /*

   *   This method return the tag which the observer care about

   */

  NS_IMETHOD GetTagName(nsString& oTag) = 0;

  /*

   *   Subject call observer when the parser hit the tag

   *   @param aTag- the tag

   *   @param numOfAttributes - number of attributes

   *   @param nameArray - array of name. 

   *   @param valueArray - array of value

   */

  NS_IMETHOD Notify(const nsString& aTag, PRUint32 numOfAttributes, 

                    const nsString* nameArray, const nsString* valueArray,

                    PRBool *oContinue) = 0;

};

#endif /* nsIElementObserver_h__ */

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

/*

 * The contents of this file are subject to the Netscape Public License

 * Version 1.0 (the "NPL")=0; you may not use this file except in

 * compliance with the NPL.  You may obtain a copy of the NPL at

 * http://www.mozilla.org/NPL/

 *

 * Software distributed under the NPL is distributed on an "AS IS" basis,

 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL

 * for the specific language governing rights and limitations under the

 * NPL.

 *

 * The Initial Developer of this code under the NPL is Netscape

 * Communications Corporation.  Portions created by Netscape are

 * Copyright (C) 1999 Netscape Communications Corporation.  All Rights

 * Reserved.

 */

#include "nsCharsetObserver.h"

static NS_DEFINE_IID(kIElementObserverIID, NS_IELEMENTOBSERVER_IID);

static NS_DEFINE_IID(kIObserverIID, NS_IOBSERVER_IID);

static NS_DEFINE_IID(kISupportsIID, NS_ISUPPORTS_IID);

nsCharsetObserver::nsCharsetObserver()

{

  NS_INIT_REFCNT();

}

nsCharsetObserver::~nsCharsetObserver()

{

}

NS_IMPL_ADDREF ( nsCharsetObserver );

NS_IMPL_RELEASE ( nsCharsetObserver );

NS_IMETHODIMP nsCharsetObserver::QueryInterface(REFNSIID aIID, void** aInstancePtr)

{

  if( NULL == aInstancePtr) {

    return NS_ERROR_NULL_POINTER;

  }

  *aInstancePtr = NULL;

  if( aIID.Equals ( kIElementObserverIID )) {

    *aInstancePtr = (void*) ((nsIElementObserver*) this);

    NS_ADDREF_THIS();

    return NS_OK;

  }

  if( aIID.Equals ( kIObserverIID )) {

    *aInstancePtr = (void*) ((nsIObserver*) this);

    NS_ADDREF_THIS();

    return NS_OK;

  }

  if( aIID.Equals ( kISupportsIID )) {

    *aInstancePtr = (void*) (this);

    NS_ADDREF_THIS();

    return NS_OK;

  }

  return NS_NOINTERFACE;

}

NS_IMETHODIMP nsCharsetObserver::GetTagName(nsString& oTag)

{

  oTag = "META";

  return NS_OK;

}

NS_IMETHODIMP nsCharsetObserver::Notify(const nsString& aTag, 

                     PRUint32 numOfAttributes, 

                     const nsString* nameArray, 

                     const nsString* valueArray,

                     PRBool *oContinue)

{

    nsresult res = NS_OK;

    *oContinue = PR_TRUE; // be default, continue

    if(aTag.EqualsIgnoreCase("META")) 

    {

      if((numOfAttributes >= 2) && 

         (nameArray[0].EqualsIgnoreCase("HTTP-EQUIV")) &&

         (valueArray[0].EqualsIgnoreCase("Content-Type")) && 

         (nameArray[1].EqualsIgnoreCase("CONTENT")) ) 

      {

         nsAutoString type;

         valueArray[2].Left(type, 9); // length of "text/html" == 9

         if(type.EqualsIgnoreCase("text/html")) 

         {

            PRInt32 charsetValueStart = valueArray[2].RFind("charset=", PR_TRUE ) ;

            if(kNotFound != charsetValueStart) {	

                  charsetValueStart += 8; // 8 = "charset=".length 

                  PRInt32 charsetValueEnd = valueArray[2].FindCharInSet("\'\";", charsetValueStart  );

                  if(kNotFound == charsetValueEnd ) 

                     charsetValueEnd = valueArray[2].Length();

                  nsAutoString theCharset;

                  valueArray[2].Mid(theCharset, charsetValueStart, charsetValueEnd - charsetValueStart);

                  // XXX 

                  // Get the charest in theCharset

                  // Now, how can we verify the object, if

                  // we pass the object  (nsScanner) when we create this object

                  // then it mean we need to create one nsIElementObserver

                  // for every nsParser object

                  // However, currently we register ourself to a global

                  // nsIObserverService, not to a nsParser. 

             } // if

         } // if

      } // if

    } // if

    return res;

}

NS_IMETHODIMP Notify(nsISupports** result) 

{

    return NS_ERROR_NOT_IMPLEMENTED;

}

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

/*

 * The contents of this file are subject to the Netscape Public License

 * Version 1.0 (the "NPL")=0; you may not use this file except in

 * compliance with the NPL.  You may obtain a copy of the NPL at

 * http://www.mozilla.org/NPL/

 *

 * Software distributed under the NPL is distributed on an "AS IS" basis,

 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL

 * for the specific language governing rights and limitations under the

 * NPL.

 *

 * The Initial Developer of this code under the NPL is Netscape

 * Communications Corporation.  Portions created by Netscape are

 * Copyright (C) 1999 Netscape Communications Corporation.  All Rights

 * Reserved.

 */

#ifndef nsCharsetObserver_h__

#define nsCharsetObserver_h__

#include "nsIElementObserver.h"

#include "nsIObserver.h"

#include "nsISupports.h"

#include "nsString.h"

#include "nsIParser.h"

class nsCharsetObserver: public nsIElementObserver, public nsIObserver {

  NS_DECL_ISUPPORTS

public:

  nsCharsetObserver();

  virtual ~nsCharsetObserver();

  /*

   *   This method return the tag which the observer care about

   */

  NS_IMETHOD GetTagName(nsString& oTag);

  /*

   *   Subject call observer when the parser hit the tag

   *   @param aTag- the tag

   *   @param numOfAttributes - number of attributes

   *   @param nameArray - array of name. 

   *   @param valueArray - array of value

   */

  NS_IMETHOD Notify(const nsString& aTag, PRUint32 numOfAttributes, 

                    const nsString* nameArray, const nsString* valueArray,

                    PRBool* oContinue);

  NS_IMETHOD Notify(nsISupports** result) = 0;

};

#endif /* nsCharsetObserver_h__ */