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 * for the specific language governing rights and limitations under the
 * License.
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 * The Original Code is mozilla.org code.
 *
 * The Initial Developer of the Original Code is
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 * Portions created by the Initial Developer are Copyright (C) 1998
 * the Initial Developer. All Rights Reserved.
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 * Contributor(s):
 *
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/**
 * MODULE NOTES:
 * @update  gess 4/1/98
 * 
 */

#ifndef __NSHTMLTOKENIZER
#define __NSHTMLTOKENIZER

#include "nsISupports.h"
#include "nsITokenizer.h"
#include "nsIDTD.h"
#include "prtypes.h"
#include "nsDeque.h"
#include "nsScanner.h"
#include "nsHTMLTokens.h"
#include "nsDTDUtils.h"

#define NS_HTMLTOKENIZER_IID      \
  {0xe4238ddd, 0x9eb6, 0x11d2, \
  {0xba, 0xa5, 0x0,     0x10, 0x4b, 0x98, 0x3f, 0xd4 }}

/***************************************************************
  Notes: 
 ***************************************************************/

#ifdef _MSC_VER
#pragma warning( disable : 4275 )
#endif

class nsHTMLTokenizer : public nsITokenizer {
public:
  
  NS_DECL_ISUPPORTS
  NS_DECL_NSITOKENIZER
  nsHTMLTokenizer(PRInt32 aParseMode = eDTDMode_quirks,
                  eParserDocType aDocType = eHTML3_Quirks,
                  eParserCommands aCommand = eViewNormal,
                  PRUint16 aFlags = 0);
  virtual ~nsHTMLTokenizer();

protected:

  virtual nsresult ConsumeTag(PRUnichar aChar,CToken*& aToken,nsScanner& aScanner,PRBool& aFlushTokens);
  virtual nsresult ConsumeStartTag(PRUnichar aChar,CToken*& aToken,nsScanner& aScanner,PRBool& aFlushTokens);
  virtual nsresult ConsumeEndTag(PRUnichar aChar,CToken*& aToken,nsScanner& aScanner);
  virtual nsresult ConsumeAttributes(PRUnichar aChar, CToken* aToken, nsScanner& aScanner);
  virtual nsresult ConsumeEntity(PRUnichar aChar,CToken*& aToken,nsScanner& aScanner);
  virtual nsresult ConsumeWhitespace(PRUnichar aChar,CToken*& aToken,nsScanner& aScanner);
  virtual nsresult ConsumeComment(PRUnichar aChar,CToken*& aToken,nsScanner& aScanner);
  virtual nsresult ConsumeNewline(PRUnichar aChar,CToken*& aToken,nsScanner& aScanner);
  virtual nsresult ConsumeText(CToken*& aToken,nsScanner& aScanner);
  virtual nsresult ConsumeSpecialMarkup(PRUnichar aChar,CToken*& aToken,nsScanner& aScanner);
  virtual nsresult ConsumeProcessingInstruction(PRUnichar aChar,CToken*& aToken,nsScanner& aScanner);

  nsresult ScanDocStructure(PRBool aIsFinalChunk);

  static void AddToken(CToken*& aToken,nsresult aResult,nsDeque* aDeque,nsTokenAllocator* aTokenAllocator);

  nsDeque            mTokenDeque;
  PRPackedBool       mIsFinalChunk;
  nsTokenAllocator*  mTokenAllocator;
  // This variable saves the position of the last tag we inspected in
  // ScanDocStructure. We start scanning the general well-formedness of the
  // document starting at this position each time.
  PRInt32            mTokenScanPos;
  PRUint32           mFlags;
};

extern nsresult NS_NewHTMLTokenizer(nsITokenizer** aInstancePtrResult,
                                    PRInt32 aMode,eParserDocType aDocType,
                                    eParserCommands aCommand, PRInt32 aFlags);

#endif