// -*- C++ -*-
/**
 * \file BufferView_pimpl.h
 * This file is part of LyX, the document processor.
 * Licence details can be found in the file COPYING.
 *
 * \author Asger Alstrup
 * \author Alfredo Braustein
 * \author Lars Gullik Bjønnes
 * \author John Levon
 * \author André Pönitz
 * \author Dekel Tsur
 * \author Jürgen Vigna
 *
 * Full author contact details are available in file CREDITS.
 */

#ifndef BUFFERVIEW_PIMPL_H
#define BUFFERVIEW_PIMPL_H

#include "BufferView.h"
#include "cursor.h"
#include "errorlist.h"

#include "insets/inset.h"

#include "frontends/key_state.h"
#include "frontends/Timeout.h"

#include "support/types.h"

#include <boost/scoped_ptr.hpp>
#include <boost/shared_ptr.hpp>
#include <boost/signals/trackable.hpp>


class Change;
class LyXKeySym;
class LyXView;
class WorkArea;
class LyXScreen;
class FuncRequest;
class FuncStatus;
class ViewMetricsInfo;


///
class BufferView::Pimpl : public boost::signals::trackable {
public:
	///
	Pimpl(BufferView & bv, LyXView * owner, int width, int height);
	///
	Painter & painter() const;
	/// return the screen for this bview
	LyXScreen & screen() const;
	///
	void setBuffer(Buffer * buf);
	///
	void resizeCurrentBuffer();
	//
	bool fitCursor();
	//
	bool multiParSel();
	///
	void update(Update::flags flags = Update::Force);
	///
	bool loadLyXFile(std::string const &, bool);
	///
	void workAreaResize();
	///
	void updateScrollbar();
	///
	void scrollDocView(int value);
	/// Wheel mouse scroll, move by multiples of text->defaultRowHeight().
	void scroll(int lines);
	///
	typedef boost::shared_ptr<LyXKeySym> LyXKeySymPtr;
	///
	void workAreaKeyPress(LyXKeySymPtr key, key_modifier::state state);
	///
	void selectionRequested();
	///
	void selectionLost();
	///
	void cursorToggle();
	///
	bool available() const;
	/// get the change at the cursor position
	Change const getCurrentChange();
	///
	void savePosition(unsigned int i);
	///
	void restorePosition(unsigned int i);
	///
	bool isSavedPosition(unsigned int i);
	///
	void switchKeyMap();
	///
	void center();
	/// a function should be executed from the workarea
	bool workAreaDispatch(FuncRequest const & ev);
	/// return true for events that will handle
	FuncStatus getStatus(FuncRequest const & cmd);
	/// a function should be executed
	bool dispatch(FuncRequest const & ev);
	/// Flag: do a full redraw of inside text of inset
	bool repaintAll() { return refresh_inside_; }
	///
	void repaintAll(bool r) {refresh_inside_ = r; }
private:
	/// An error list (replaces the error insets)
	ErrorList errorlist_;
	/// add an error to the list
	void addError(ErrorItem const &);
	/// buffer errors signal connection
	boost::signals::connection errorConnection_;
	/// buffer messages signal connection
	boost::signals::connection messageConnection_;
	/// buffer busy status signal connection
	boost::signals::connection busyConnection_;
	/// buffer title changed signal connection
	boost::signals::connection titleConnection_;
	/// buffer reset timers signal connection
	boost::signals::connection timerConnection_;
	/// buffer readonly status changed signal connection
	boost::signals::connection readonlyConnection_;
	/// buffer closing signal connection
	boost::signals::connection closingConnection_;
	/// connect to signals in the given buffer
	void connectBuffer(Buffer & buf);
	/// disconnect from signals in the given buffer
	void disconnectBuffer();
	/// track changes for the document
	void trackChanges();
	/// notify readonly status
	void showReadonly(bool);


	///
	friend class BufferView;

	///
	BufferView * bv_;
	///
	LyXView * owner_;
	///
	Buffer * buffer_;
	///
	boost::scoped_ptr<LyXScreen> screen_;
	///
	boost::scoped_ptr<WorkArea> workarea_;
	/// Estimated average par height for scrollbar
	int wh_;
	///
	Timeout cursor_timeout;
	///
	void stuffClipboard(std::string const &) const;
	///
	bool using_xterm_cursor;
	///
	class Position {
	public:
		/// Filename
		std::string filename;
		/// Cursor paragraph Id
		int par_id;
		/// Cursor position
		lyx::pos_type par_pos;
		///
		Position() : par_id(0), par_pos(0) {}
		///
		Position(std::string const & f, int id, lyx::pos_type pos)
			: filename(f), par_id(id), par_pos(pos) {}
	};
	///
	std::vector<Position> saved_positions;
	///
	void MenuInsertLyXFile(std::string const & filen);
	/// our workarea
	WorkArea & workarea() const;
	/// this is used to handle XSelection events in the right manner
	struct {
		CursorSlice cursor;
		CursorSlice anchor;
		bool set;
	} xsel_cache_;
	///
	LCursor cursor_;
	///
	bool multiparsel_cache_;
	///
	lyx::pit_type anchor_ref_;
	///
	int offset_ref_;
	///
	ViewMetricsInfo metrics(bool singlepar = false);
	/// Working variable indicating a full screen refresh
	mutable bool refresh_inside_;
	
};
#endif // BUFFERVIEW_PIMPL_H
