jsonwriter.h

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// Name:        jsonwriter.h
// Purpose:     the generator of JSON text from a JSON value
// Author:      Luciano Cattani
// Created:     2007/09/15
// RCS-ID:      $Id: jsonwriter.h,v 1.4 2008/03/03 19:05:45 luccat Exp $
// Copyright:   (c) 2007 Luciano Cattani
// Licence:     wxWidgets licence

#if !defined( _WX_JSONWRITER_H )
#define _WX_JSONWRITER_H

#ifdef __GNUG__
    #pragma interface "jsonwriter.h"
#endif

// For compilers that support precompilation, includes "wx/wx.h".
#include "wx/wxprec.h"
 
#ifdef __BORLANDC__
    #pragma hdrstop
#endif

// for all others, include the necessary headers (this file is usually all you
// need because it includes almost all "standard" wxWidgets headers)
#ifndef WX_PRECOMP
    #include <wx/stream.h>
    #include <wx/string.h>
#endif

#include "json_defs.h"
#include "jsonval.h"


// The 'style' flags for the writer
//
// BIT= 11 10 9 8 7 6 5 4 3 2 1 0
//       |  | | | | | | | | | | |
//       |  | | | | | | | | | |  -> 1=styled (indentation), 0=not styled (other bits ignored)
//       |  | | | | | | | | |  ---> 0=do not write comments, 1=write comments
//       |  | | | | | | | |  -----> 1=force comments to be written before.the value
//       |  | | | | | | |  -------> 1=forcecomments to be written after the value
//       |  | | | | | |  ---------> 0=do not split strings, 1=split strings
//       |  | | | | |  -----------> 1=do not add linefeeds between values (STYLED only)
//       |  | | | |  -------------> 1=escape the solidus '/' character
//       |  | | |  ---------------> 1=multiline string (LF and TAB not escaped)
//       |  | |  -----------------> 1=prepend a plus (+) sign to unsigned integers
//       |  |  -------------------> 1=use tabs for indentation
//       |   ---------------------> 1= do not add indentation (STYLED only)
//        ------------------------> 1= ANSI: do not convert to UTF-8
enum {
    wxJSONWRITER_NONE            = 0,
    wxJSONWRITER_STYLED          = 1,
    wxJSONWRITER_WRITE_COMMENTS  = 2,
    wxJSONWRITER_COMMENTS_BEFORE = 4,
    wxJSONWRITER_COMMENTS_AFTER  = 8,
    wxJSONWRITER_SPLIT_STRING    = 16,
    wxJSONWRITER_NO_LINEFEEDS    = 32,
    wxJSONWRITER_ESCAPE_SOLIDUS   = 64,
    wxJSONWRITER_MULTILINE_STRING   = 128,
    wxJSONWRITER_RECOGNIZE_UNSIGNED = 256,
    wxJSONWRITER_TAB_INDENT         = 512,
    wxJSONWRITER_NO_INDENTATION     = 1024,
    wxJSONWRITER_NOUTF8_STREAM      = 2048,
};

// class declaration

class WXDLLIMPEXP_JSON wxJSONWriter
{
public:
    wxJSONWriter( int style = wxJSONWRITER_STYLED, int indent = 0, int step = 3 );
    ~wxJSONWriter();

    void Write( const wxJSONValue& value, wxString& str );
    void Write( const wxJSONValue& value, wxOutputStream& os );

protected:

    //int  DoWrite( const wxJSONValue& value, const wxString* key, bool comma );
    int  DoWrite( wxOutputStream& os, const wxJSONValue& value, const wxString* key, bool comma );
    int  WriteIndent( wxOutputStream& os );
    int  WriteIndent( wxOutputStream& os, int num );
    bool IsSpace( wxChar ch );
    bool IsPunctuation( wxChar ch );

    int  WriteString( wxOutputStream& os, const wxString& str );
    int  WriteStringValue( wxOutputStream& os, const wxString& str );
    int  WriteNullValue( wxOutputStream& os );
    int  WriteIntValue( wxOutputStream& os, const wxJSONValue& v );
    int  WriteUIntValue( wxOutputStream& os, const wxJSONValue& v );
    int  WriteBoolValue( wxOutputStream& os, const wxJSONValue& v );
    int  WriteDoubleValue( wxOutputStream& os, const wxJSONValue& v );

    // int  WritePrimitiveValue( wxOutputStream& os, const wxJSONValue& value );
    int  WriteInvalid( wxOutputStream& os );
    int  WriteSeparator( wxOutputStream& os );

    int  WriteKey( wxOutputStream& os, const wxString& key );
    int  WriteComment( wxOutputStream& os, const wxJSONValue& value, bool indent );

    // int  WriteComment( const wxJSONValue& value, bool indent );
    // int  WriteChar( wxOutputStream& os, wxChar ch );

    int  WriteError( const wxString& err );

private:
    int   m_style;

    int   m_indent;

    int   m_step;

    int   m_level;

    // The line number when printing JSON text output (not yet used)
    int   m_lineNo;

    // The column number when printing JSON text output
    int   m_colNo;
    
    // Flag used in ANSI mode that controls UTF-8 conversion
    bool  m_noUtf8;
};


#endif          // not defined _WX_JSONWRITER_H

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