/*
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 2002 The Apache Software Foundation.  All rights
 * reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution,
 *    if any, must include the following acknowledgment:
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowledgment may appear in the software itself,
 *    if and wherever such third-party acknowledgments normally appear.
 *
 * 4. The names "Xerces" and "Apache Software Foundation" must
 *    not be used to endorse or promote products derived from this
 *    software without prior written permission. For written
 *    permission, please contact apache\@apache.org.
 *
 * 5. Products derived from this software may not be called "Apache",
 *    nor may "Apache" appear in their name, without prior written
 *    permission of the Apache Software Foundation.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation, and was
 * originally based on software copyright (c) 1999, International
 * Business Machines, Inc., http://www.ibm.com .  For more information
 * on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 */

/*
 * $Log: WFXMLScanner.hpp,v $
 * Revision 1.6  2003/05/16 21:36:57  knoaman
 * Memory manager implementation: Modify constructors to pass in the memory manager.
 *
 * Revision 1.5  2003/05/15 18:26:29  knoaman
 * Partial implementation of the configurable memory manager.
 *
 * Revision 1.4  2003/03/07 18:08:58  tng
 * Return a reference instead of void for operator=
 *
 * Revision 1.3  2003/01/15 15:49:49  knoaman
 * Change constant declaration name to match its value.
 *
 * Revision 1.2  2003/01/02 16:29:05  knoaman
 * Modified the way we handle element tags.
 *
 * Revision 1.1  2002/12/04 02:01:29  knoaman
 * Initial checkin.
 *
 */


#if !defined(WFXMLSCANNER_HPP)
#define WFXMLSCANNER_HPP

#include <xercesc/internal/XMLScanner.hpp>
#include <xercesc/internal/ElemStack.hpp>
#include <xercesc/util/ValueHashTableOf.hpp>
#include <xercesc/util/ValueVectorOf.hpp>
#include <xercesc/validators/DTD/DTDElementDecl.hpp>

XERCES_CPP_NAMESPACE_BEGIN


//  This is a a non-validating scanner. No DOCTYPE or XML Schema processing
//  will take place.
class XMLPARSER_EXPORT WFXMLScanner : public XMLScanner
{
public :
    // -----------------------------------------------------------------------
    //  Constructors and Destructor
    // -----------------------------------------------------------------------
    WFXMLScanner
    (
        XMLValidator* const       valToAdopt
        , MemoryManager* const    manager = XMLPlatformUtils::fgMemoryManager
    );
    WFXMLScanner
    (
        XMLDocumentHandler* const docHandler
        , DocTypeHandler* const   docTypeHandler
        , XMLEntityHandler* const entityHandler
        , XMLErrorReporter* const errReporter
        , XMLValidator* const     valToAdopt
        , MemoryManager* const    manager = XMLPlatformUtils::fgMemoryManager
    );
    virtual ~WFXMLScanner();

    // -----------------------------------------------------------------------
    //  XMLScanner public virtual methods
    // -----------------------------------------------------------------------
    virtual const XMLCh* getName() const;
    virtual NameIdPool<DTDEntityDecl>* getEntityDeclPool();
    virtual const NameIdPool<DTDEntityDecl>* getEntityDeclPool() const;
    virtual unsigned int resolveQName
    (
        const   XMLCh* const        qName
        ,       XMLBuffer&          prefixBufToFill
        , const short               mode
        ,       int&                prefixColonPos
    );
    virtual void scanDocument
    (
        const   InputSource&    src
    );
    virtual bool scanNext(XMLPScanToken& toFill);
    virtual Grammar* loadGrammar
    (
        const   InputSource&    src
        , const short           grammarType
        , const bool            toCache = false
    );

private :
    // -----------------------------------------------------------------------
    //  Unimplemented constructors and operators
    // -----------------------------------------------------------------------
    WFXMLScanner();
    WFXMLScanner(const WFXMLScanner&);
    WFXMLScanner& operator=(const WFXMLScanner&);

    // -----------------------------------------------------------------------
    //  XMLScanner virtual methods
    // -----------------------------------------------------------------------
    virtual void scanCDSection();
    virtual void scanCharData(XMLBuffer& toToUse);
    virtual EntityExpRes scanEntityRef
    (
        const   bool    inAttVal
        ,       XMLCh&  firstCh
        ,       XMLCh&  secondCh
        ,       bool&   escaped
    );
    virtual void scanDocTypeDecl();
    virtual void scanReset(const InputSource& src);
    virtual void sendCharData(XMLBuffer& toSend);

    // -----------------------------------------------------------------------
    //  Private helper methods
    // -----------------------------------------------------------------------
    void commonInit();
    void cleanUp();
    unsigned int resolvePrefix
    (
        const   XMLCh* const        prefix
        , const ElemStack::MapModes mode
    );

    // -----------------------------------------------------------------------
    //  Private scanning methods
    // -----------------------------------------------------------------------
    bool scanAttValue
    (
        const   XMLCh* const    attrName
        ,       XMLBuffer&      toFill
    );
    bool scanContent(const bool extEntity);
    void scanEndTag(bool& gotData);
    bool scanStartTag(bool& gotData);
    bool scanStartTagNS(bool& gotData);

    // -----------------------------------------------------------------------
    //  Data members
    //
    //  fElemStack
    //      This is the element stack that is used to track the elements that
    //      are currently being worked on.
    //
    //  fEntityTable
    //      This the table that contains the default entity entries.
    //
    //  fAttrNameHashList
    //      This contains the hash value for attribute names. It's used when
    //      checking for duplicate attributes.
    //
    //  fAttrNSList
    //      This contains XMLAttr objects that we need to map their prefixes
    //      to URIs when namespace is enabled.
    //
    // -----------------------------------------------------------------------
    unsigned int                       fElementIndex;
    RefVectorOf<XMLElementDecl>*       fElements;
    ValueHashTableOf<XMLCh>*           fEntityTable;
    ValueVectorOf<unsigned int>*       fAttrNameHashList;
    ValueVectorOf<XMLAttr*>*           fAttrNSList;
    RefHashTableOf<XMLElementDecl>*    fElementLookup;  
    ElemStack                          fElemStack;
};

inline const XMLCh* WFXMLScanner::getName() const
{
    return XMLUni::fgWFXMLScanner;
}


XERCES_CPP_NAMESPACE_END

#endif
