cadfile.h

/*******************************************************************************
 *  Project: libopencad
 *  Purpose: OpenSource CAD formats support library
 *  Author: Alexandr Borzykh, mush3d at gmail.com
 *  Author: Dmitry Baryshnikov, bishop.dev@gmail.com
 *  Language: C++
 *******************************************************************************
 *  The MIT License (MIT)
 *
 *  Copyright (c) 2016 Alexandr Borzykh
 *  Copyright (c) 2016 NextGIS, <info@nextgis.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 CADFILE_H
#define CADFILE_H

#include "cadfileio.h"
#include "cadclasses.h"
#include "cadtables.h"


class OCAD_EXTERN CADFile
{
    friend class CADTables;
    friend class CADLayer;
public:
    enum OpenOptions
    {
        READ_ALL,       
        READ_FAST,      
        READ_FASTEST    
    };

public:
    CADFile (CADFileIO* poFileIO);
    virtual ~CADFile();

public:
    const CADHeader& getHeader() const;
    const CADClasses& getClasses() const;
    const CADTables& getTables() const;

public:
    virtual int parseFile(enum OpenOptions eOptions);
    virtual size_t getLayersCount() const;
    virtual CADLayer &getLayer(size_t index);
//    virtual size_t GetBlocksCount();
//    virtual CADBlockObject * GetBlock( size_t index );

protected:
    virtual CADObject * getObject( long index, bool bHandlesOnly = false ) = 0;

    virtual CADGeometry * getGeometry( long index ) = 0;

    virtual int readSectionLocator() = 0;

    virtual int readHeader(enum OpenOptions eOptions) = 0;

    virtual int readClasses(enum OpenOptions eOptions) = 0;

    virtual int createFileMap() = 0;

    virtual int readTables(enum OpenOptions eOptions);

protected:
    CADFileIO* fileIO;
    CADHeader header;
    CADClasses classes;
    CADTables tables;

protected:
    std::map<long, long> objectsMap; // object index <-> file offset
};


#endif // CADFILE_H