/******************************************************************************
 * $Id: kml.h b1c9c12ad373e40b955162b45d704070d4ebf7b0 2019-06-19 16:50:15 +0200 Even Rouault $
 *
 * Project:  KML Driver
 * Purpose:  Class for reading, parsing and handling a kmlfile.
 * Author:   Jens Oberender, j.obi@troja.net
 *
 ******************************************************************************
 * Copyright (c) 2007, Jens Oberender
 * Copyright (c) 2008-2012, Even Rouault <even dot rouault at spatialys.com>
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included
 * in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 ****************************************************************************/
#ifndef OGR_KML_KML_H_INCLUDED
#define OGR_KML_KML_H_INCLUDED

#ifdef HAVE_EXPAT

#include "ogr_expat.h"
#include "cpl_vsi.h"

// std
#include <iostream>
#include <string>
#include <vector>

#include "cpl_port.h"
#include "kmlutility.h"

class KMLNode;

typedef enum
{
    KML_VALIDITY_UNKNOWN,
    KML_VALIDITY_INVALID,
    KML_VALIDITY_VALID
} OGRKMLValidity;

class KML
{
public:
    KML();
    virtual ~KML();
    bool open(const char* pszFilename);
    bool isValid();
    bool isHandled(std::string const& elem) const;
    virtual bool isLeaf(std::string const& elem) const;
    virtual bool isFeature(std::string const& elem) const;
    virtual bool isFeatureContainer(std::string const& elem) const;
    virtual bool isContainer(std::string const& elem) const;
    virtual bool isRest(std::string const& elem) const;
    virtual void findLayers(KMLNode* poNode, int bKeepEmptyContainers);

    bool hasOnlyEmpty() const;

    bool parse();
    void print(unsigned short what = 3);
    std::string getError() const;
    int classifyNodes();
    void eliminateEmpty();
    int getNumLayers() const;
    bool selectLayer(int);
    std::string getCurrentName() const;
    Nodetype getCurrentType() const;
    int is25D() const;
    int getNumFeatures();
    Feature* getFeature(std::size_t nNum, int& nLastAsked, int &nLastCount);

    void unregisterLayerIfMatchingThisNode(KMLNode* poNode);

protected:
    void checkValidity();

    static void XMLCALL startElement(void *, const char *, const char **);
    static void XMLCALL startElementValidate(void *, const char *, const char **);
    static void XMLCALL dataHandler(void *, const char *, int);
    static void XMLCALL dataHandlerValidate(void *, const char *, int);
    static void XMLCALL endElement(void *, const char *);

    // Trunk of KMLnodes.
    KMLNode* poTrunk_;
    // Number of layers.
    int nNumLayers_;
    KMLNode** papoLayers_;

private:
    // Depth of the DOM.
    unsigned int nDepth_;
    // KML version number.
    std::string sVersion_;
    // Set to KML_VALIDITY_VALID if the beginning of the file is detected as KML
    OGRKMLValidity validity;
    // File descriptor.
    VSILFILE *pKMLFile_;
    // Error text ("" when everything is OK").
    std::string sError_;
    // Current KMLNode.
    KMLNode *poCurrent_;

    XML_Parser oCurrentParser;
    int nDataHandlerCounter;
    int nWithoutEventCounter;
};

#endif // HAVE_EXPAT

#endif /* OGR_KML_KML_H_INCLUDED */
