#ifndef __RTFREADER_H__
#define __RTFREADER_H__

#include <string>
#include <stack>
using std::string;
using std::wstring;

class RtfReader;

class RtfHandler
{
public:
	virtual void startDocument(RtfReader* reader) = 0;
	virtual void endDocument() = 0;
  virtual void controlWord(const string& cw, int flags, int param) = 0;
	virtual void groupStart() = 0;
	virtual void groupEnd() = 0;
	virtual void charData(wstring data) = 0;

	static const int kAsterisk;
	static const int kHasParam;
	static const int kIsEncoded;
};

class RtfReader
{
public:
	RtfReader();
	virtual ~RtfReader();


	bool parse(string fileName);
	bool parse(FILE* file);

	void setHandler(RtfHandler* handler)
		{ m_handler = handler; }
	string getParseErrors() const
		{ return m_parseErrors; }
	int getDepth() const
		{ return m_depth; }
	void setHexParse(bool parse)
		{ m_parseHex = parse; }
	void setUnicode(bool unicode);

protected:
	RtfHandler* m_handler;
	int m_depth;
	bool m_parseHex;
	string m_parseErrors;

	// Unicode handling
	bool m_parseUnicode;
	typedef std::stack<int> StackInt;
	StackInt m_uniEatStack;
	int m_uniEat;

private:

	struct RtfContext
	{
		FILE* file;
		bool isData;
		wstring data;
	};

	bool parseControlWord(RtfContext& cx);
	bool parseHexChar(RtfContext& cx, int num);
	void sendControlWord(RtfContext& cx, string cw, int flags, int param);
	void sendData(RtfContext& cx, wchar_t ch);
	void sendData(RtfContext& cx, wstring data);
	void emptyData(RtfContext& cx);
};

#endif // __RTFREADER_H__