// -*- C++ -*-
/* This file is part of
 * ======================================================
 *
 *           LyX, The Document Processor
 *
 *	    Copyright 1995 Matthias Ettrich
 *          Copyright 1995-2001 The LyX Team.
 *
 * ====================================================== */

#ifndef PARAGRAPH_PIMPL_H
#define PARAGRAPH_PIMPL_H

#ifdef __GNUG__
#pragma interface
#endif

#include "paragraph.h"
#include "ParagraphParameters.h"

#include <boost/array.hpp>

class LyXLayout;

struct Paragraph::Pimpl {
	///
	typedef std::vector<value_type> TextContainer;

	///
	Pimpl(Paragraph * owner);
	/// Copy constructor
	Pimpl(Pimpl const &, Paragraph * owner, bool same_ids = false);
	///
	lyx::pos_type size() const {
		return text.size();
	}
	///
	void clear();
	///
	void setContentsFromPar(Paragraph const * par);
	///
	value_type getChar(lyx::pos_type pos) const;
	///
	void setChar(lyx::pos_type pos, value_type c);
	///
	void insertChar(lyx::pos_type pos, value_type c, LyXFont const & font);
	///
	void insertInset(lyx::pos_type pos, Inset * inset, LyXFont const & font);
	///
	void erase(lyx::pos_type pos);
	///
	LyXFont const realizeFont(LyXFont const & font,
				  BufferParams const & bparams) const;
	///
	Inset * inset_owner;
	///
	boost::array<int, 10> counter_;

	///
	friend struct matchIT;
	///
	struct matchIT {
		/// used by lower_bound and upper_bound
		inline
		int operator()(InsetTable const & a, InsetTable const & b) const {
			return a.pos < b.pos;
		}
	};
	/** A font entry covers a range of positions. Notice that the
	    entries in the list are inserted in random order.
	    I don't think it's worth the effort to implement a more effective
	    datastructure, because the number of different fonts in a paragraph
	    is limited. (Asger)
	    Nevertheless, I decided to store fontlist using a sorted vector:
	    fontlist = { {pos_1,font_1} , {pos_2,font_2} , ... } where
	    pos_1 < pos_2 < ..., font_{i-1} != font_i for all i,
	    and font_i covers the chars in positions pos_{i-1}+1,...,pos_i
	    (font_1 covers the chars 0,...,pos_1) (Dekel)
	*/
	struct FontTable  {
		///
		FontTable(lyx::pos_type p, LyXFont const & f)
			: pos_(p)
			{
				font_ = container.get(f);
			}
		///
		lyx::pos_type pos() const { return pos_; }
		///
		void pos(lyx::pos_type p) { pos_ = p; }
		///
		LyXFont const & font() const { return *font_; }
		///
		void font(LyXFont const & f) { font_ = container.get(f);}
	private:
		/// End position of paragraph this font attribute covers
		lyx::pos_type pos_;
		/** Font. Interpretation of the font values:
		    If a value is LyXFont::INHERIT_*, it means that the font
		    attribute is inherited from either the layout of this
		    paragraph or, in the case of nested paragraphs, from the
		    layout in the environment one level up until completely
		    resolved.
		    The values LyXFont::IGNORE_* and LyXFont::TOGGLE are NOT
		    allowed in these font tables.
		*/
		boost::shared_ptr<LyXFont> font_;
		///
		static ShareContainer<LyXFont> container;
	};
	///
	friend struct matchFT;
	///
	struct matchFT {
		/// used by lower_bound and upper_bound
		inline
		int operator()(FontTable const & a, FontTable const & b) const {
			return a.pos() < b.pos();
		}
	};

	///
	typedef std::vector<FontTable> FontList;
	///
	FontList fontlist;
	///
	Paragraph * TeXDeeper(Buffer const *, BufferParams const &,
				 std::ostream &, TexRow & texrow);
	///
	void simpleTeXBlanks(std::ostream &, TexRow & texrow,
			     lyx::pos_type const i,
			     int & column, LyXFont const & font,
			     LyXLayout const & style);
	///
	void simpleTeXSpecialChars(Buffer const *, BufferParams const &,
				   std::ostream &, TexRow & texrow,
				   bool moving_arg,
				   LyXFont & font, LyXFont & running_font,
				   LyXFont & basefont, bool & open_font,
				   LyXLayout const & style,
				   lyx::pos_type & i,
				   int & column, value_type const c);

	///
	void validate(LaTeXFeatures & features,
		      LyXLayout const & layout) const;

	///
	Paragraph * getParFromID(int id) const;
	///
	unsigned int id_;
	///
	static unsigned int paragraph_id;
	///
	ParagraphParameters params;
private:
	/// match a string against a particular point in the paragraph
	bool isTextAt(string const & str, lyx::pos_type pos) const;

	/// Who owns us?
	Paragraph * owner_;
	///
	TextContainer text;
};

#endif