/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
 *
 * ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is Mozilla Communicator client code.
 *
 * The Initial Developer of the Original Code is
 * Netscape Communications Corporation.
 * Portions created by the Initial Developer are Copyright (C) 1998
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either of the GNU General Public License Version 2 or later (the "GPL"),
 * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */
#ifndef NS_PARSERSERVICE_H__
#define NS_PARSERSERVICE_H__

#include "nsIParserService.h"
#include "nsDTDUtils.h"
#include "nsVoidArray.h"

extern "C" int MOZ_XMLIsLetter(const char* ptr);
extern "C" int MOZ_XMLIsNCNameChar(const char* ptr);
extern "C" int MOZ_XMLTranslateEntity(const char* ptr, const char* end,
                                      const char** next, PRUnichar* result);

class nsParserService : public nsIParserService {
public:
  nsParserService();
  virtual ~nsParserService();

  NS_DECL_ISUPPORTS

  PRInt32 HTMLAtomTagToId(nsIAtom* aAtom) const;

  PRInt32 HTMLCaseSensitiveAtomTagToId(nsIAtom* aAtom) const;

  PRInt32 HTMLStringTagToId(const nsAString& aTag) const;

  const PRUnichar *HTMLIdToStringTag(PRInt32 aId) const;
  
  nsIAtom *HTMLIdToAtomTag(PRInt32 aId) const;

  NS_IMETHOD HTMLConvertEntityToUnicode(const nsAString& aEntity, 
                                        PRInt32* aUnicode) const;
  NS_IMETHOD HTMLConvertUnicodeToEntity(PRInt32 aUnicode,
                                        nsCString& aEntity) const;
  NS_IMETHOD IsContainer(PRInt32 aId, PRBool& aIsContainer) const;
  NS_IMETHOD IsBlock(PRInt32 aId, PRBool& aIsBlock) const;

   // Observer mechanism
  NS_IMETHOD RegisterObserver(nsIElementObserver* aObserver,
                              const nsAString& aTopic,
                              const eHTMLTags* aTags = nsnull);

  NS_IMETHOD UnregisterObserver(nsIElementObserver* aObserver,
                                const nsAString& aTopic);
  NS_IMETHOD GetTopicObservers(const nsAString& aTopic,
                               nsIObserverEntry** aEntry);

  nsresult CheckQName(const nsAString& aQName,
                      PRBool aNamespaceAware, const PRUnichar** aColon);

  PRBool IsXMLLetter(PRUnichar aChar)
  {
    return MOZ_XMLIsLetter(NS_REINTERPRET_CAST(const char*, &aChar));
  }
  PRBool IsXMLNCNameChar(PRUnichar aChar)
  {
    return MOZ_XMLIsNCNameChar(NS_REINTERPRET_CAST(const char*, &aChar));
  }
  PRUint32 DecodeEntity(const PRUnichar* aStart, const PRUnichar* aEnd,
                        const PRUnichar** aNext, PRUnichar* aResult)
  {
    *aNext = nsnull;
    return MOZ_XMLTranslateEntity(NS_REINTERPRET_CAST(const char*, aStart),
                                  NS_REINTERPRET_CAST(const char*, aEnd),
                                  NS_REINTERPRET_CAST(const char**, aNext),
                                  aResult);
  }

protected:
  nsObserverEntry* GetEntry(const nsAString& aTopic);
  nsresult CreateEntry(const nsAString& aTopic,
                       nsObserverEntry** aEntry);

  nsDeque  mEntries;  //each topic holds a list of observers per tag.
  PRBool   mHaveNotifiedCategoryObservers;
};

#endif