writer.h

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// Copyright 2007-2010 Baptiste Lepilleur
// Distributed under MIT license, or public domain if desired and
// recognized in your jurisdiction.
// See file LICENSE for detail or copy at http://jsoncpp.sourceforge.net/LICENSE

#ifndef JSON_WRITER_H_INCLUDED
#define JSON_WRITER_H_INCLUDED

#if !defined(JSON_IS_AMALGAMATION)
#include "value.h"
#endif // if !defined(JSON_IS_AMALGAMATION)
#include <vector>
#include <string>
#include <ostream>

// Disable warning C4251: <data member>: <type> needs to have dll-interface to
// be used by...
#if defined(JSONCPP_DISABLE_DLL_INTERFACE_WARNING)
#pragma warning(push)
#pragma warning(disable : 4251)
#endif // if defined(JSONCPP_DISABLE_DLL_INTERFACE_WARNING)

namespace Json {

class Value;

class JSON_API StreamWriter {
protected:
  JSONCPP_OSTREAM* sout_;  // not owned; will not delete
public:
  StreamWriter();
  virtual ~StreamWriter();
  virtual int write(Value const& root, JSONCPP_OSTREAM* sout) = 0;

  class JSON_API Factory {
  public:
    virtual ~Factory();
    virtual StreamWriter* newStreamWriter() const = 0;
  };  // Factory
};  // StreamWriter

JSONCPP_STRING JSON_API writeString(StreamWriter::Factory const& factory, Value const& root);


class JSON_API StreamWriterBuilder : public StreamWriter::Factory {
public:
  // Note: We use a Json::Value so that we can add data-members to this class
  // without a major version bump.
  Json::Value settings_;

  StreamWriterBuilder();
  ~StreamWriterBuilder() JSONCPP_OVERRIDE;

  StreamWriter* newStreamWriter() const JSONCPP_OVERRIDE;

  bool validate(Json::Value* invalid) const;
  Value& operator[](JSONCPP_STRING key);

  static void setDefaults(Json::Value* settings);
};

class JSON_API Writer {
public:
  virtual ~Writer();

  virtual JSONCPP_STRING write(const Value& root) = 0;
};

class JSON_API FastWriter : public Writer {

public:
  FastWriter();
  ~FastWriter() JSONCPP_OVERRIDE {}

  void enableYAMLCompatibility();

  void dropNullPlaceholders();

  void omitEndingLineFeed();

public: // overridden from Writer
  JSONCPP_STRING write(const Value& root) JSONCPP_OVERRIDE;

private:
  void writeValue(const Value& value);

  JSONCPP_STRING document_;
  bool yamlCompatiblityEnabled_;
  bool dropNullPlaceholders_;
  bool omitEndingLineFeed_;
};

class JSON_API StyledWriter : public Writer {
public:
  StyledWriter();
  ~StyledWriter() JSONCPP_OVERRIDE {}

public: // overridden from Writer
  JSONCPP_STRING write(const Value& root) JSONCPP_OVERRIDE;

private:
  void writeValue(const Value& value);
  void writeArrayValue(const Value& value);
  bool isMultineArray(const Value& value);
  void pushValue(const JSONCPP_STRING& value);
  void writeIndent();
  void writeWithIndent(const JSONCPP_STRING& value);
  void indent();
  void unindent();
  void writeCommentBeforeValue(const Value& root);
  void writeCommentAfterValueOnSameLine(const Value& root);
  bool hasCommentForValue(const Value& value);
  static JSONCPP_STRING normalizeEOL(const JSONCPP_STRING& text);

  typedef std::vector<JSONCPP_STRING> ChildValues;

  ChildValues childValues_;
  JSONCPP_STRING document_;
  JSONCPP_STRING indentString_;
  unsigned int rightMargin_;
  unsigned int indentSize_;
  bool addChildValues_;
};

class JSON_API StyledStreamWriter {
public:
  StyledStreamWriter(JSONCPP_STRING indentation = "\t");
  ~StyledStreamWriter() {}

public:
  void write(JSONCPP_OSTREAM& out, const Value& root);

private:
  void writeValue(const Value& value);
  void writeArrayValue(const Value& value);
  bool isMultineArray(const Value& value);
  void pushValue(const JSONCPP_STRING& value);
  void writeIndent();
  void writeWithIndent(const JSONCPP_STRING& value);
  void indent();
  void unindent();
  void writeCommentBeforeValue(const Value& root);
  void writeCommentAfterValueOnSameLine(const Value& root);
  bool hasCommentForValue(const Value& value);
  static JSONCPP_STRING normalizeEOL(const JSONCPP_STRING& text);

  typedef std::vector<JSONCPP_STRING> ChildValues;

  ChildValues childValues_;
  JSONCPP_OSTREAM* document_;
  JSONCPP_STRING indentString_;
  unsigned int rightMargin_;
  JSONCPP_STRING indentation_;
  bool addChildValues_ : 1;
  bool indented_ : 1;
};

#if defined(JSON_HAS_INT64)
JSONCPP_STRING JSON_API valueToString(Int value);
JSONCPP_STRING JSON_API valueToString(UInt value);
#endif // if defined(JSON_HAS_INT64)
JSONCPP_STRING JSON_API valueToString(LargestInt value);
JSONCPP_STRING JSON_API valueToString(LargestUInt value);
JSONCPP_STRING JSON_API valueToString(double value);
JSONCPP_STRING JSON_API valueToString(bool value);
JSONCPP_STRING JSON_API valueToQuotedString(const char* value);

JSON_API JSONCPP_OSTREAM& operator<<(JSONCPP_OSTREAM&, const Value& root);

} // namespace Json

#if defined(JSONCPP_DISABLE_DLL_INTERFACE_WARNING)
#pragma warning(pop)
#endif // if defined(JSONCPP_DISABLE_DLL_INTERFACE_WARNING)

#endif // JSON_WRITER_H_INCLUDED