// -*- C++ -*-
/**
 * \file TocBackend.h
 * This file is part of LyX, the document processor.
 * Licence details can be found in the file COPYING.
 *
 * \author Jean-Marc Lasgouttes
 * \author Angus Leeming
 * \author Abdelrazak Younes
 *
 * Full author contact details are available in file CREDITS.
 *
 * TocBackend mainly used in toc.[Ch]
 */

#ifndef TOC_BACKEND_H
#define TOC_BACKEND_H

#include <map>
#include <vector>
#include <string>

#include "pariterator.h"

#include "support/docstream.h"


namespace lyx {

class Buffer;
class Paragraph;
class FuncRequest;
class LCursor;

///
/**
*/
class TocItem
{
	friend class TocBackend;

public:
	///
	TocItem(ParConstIterator const & par_it = ParConstIterator(),
		int d = -1,
		docstring const & s = docstring());
	///
	~TocItem() {}
	///
	bool const isValid() const;
	///
	int const id() const;
	///
	int const depth() const;
	///
	docstring const & str() const;
	///
	docstring const asString() const;

	/// the action corresponding to the goTo above
	FuncRequest action() const;
	
protected:
	/// Current position of item.
	ParConstIterator par_it_;

	/// nesting depth
	int depth_;

	/// Full item string
	docstring str_;
};


///
typedef std::vector<TocItem> Toc;
typedef Toc::const_iterator TocIterator;
/// The ToC list.
/// A class and no typedef because we want to forward declare it.
class TocList : public std::map<std::string, Toc>
{
};


///
/**
*/
class TocBackend
{
public:
	///
	TocBackend(Buffer const * buffer = NULL): buffer_(buffer) {}
	///
	~TocBackend() {}
	///
	void setBuffer(Buffer const * buffer)
	{ buffer_ = buffer; }
	///
	bool addType(std::string const & type);
	///
	void update();
	///
	TocList const & tocs() const
	{ return tocs_; }
	///
	std::vector<std::string> const & types() const
	{ return types_; }
	///
	Toc const & toc(std::string const & type) const;
	/// Return the first Toc Item before the cursor
	TocIterator const item(std::string const & type, ParConstIterator const &) const;

	void writePlaintextTocList(std::string const & type, odocstream & os) const;

private:
	/// 
	TocList tocs_;
	///
	std::vector<std::string> types_;
	///
	Buffer const * buffer_;

}; // TocBackend

inline
bool operator==(TocItem const & a, TocItem const & b)
{
	return a.id() == b.id() && a.str() == b.str() && a.depth() == b.depth();
}


inline
bool operator!=(TocItem const & a, TocItem const & b)
{
	return !(a == b);
}


} // namespace lyx

#endif // TOC_BACKEND_H