lyx_mirror/src/mathed/math_inset.h

// -*- C++ -*-
/*
 *  File:        math_inset.h
 *  Purpose:     Declaration of insets for mathed 
 *  Author:      Alejandro Aguilar Sierra <asierra@servidor.unam.mx> 
 *  Created:     January 1996
 *  Description: Math paragraph and objects for a WYSIWYG math editor.
 *
 *  Dependencies: Xlib, XForms
 *
 *  Copyright: 1996, 1997 Alejandro Aguilar Sierra
 *
 *   Version: 0.8beta, Mathed & Lyx project.
 *
 *   You are free to use and modify this code under the terms of
 *   the GNU General Public Licence version 2 or later.
 */

//  Note: These math insets are internal to Mathed and are not derived
//        from lyx inset.

#ifndef MATH_INSET
#define MATH_INSET

#ifdef __GNUG__
#pragma interface
#endif

#include "LString.h"
#include "symbol_def.h"

class Painter;

/** Abstract base class for all math objects.
    A math insets is for use of the math editor only, it isn't a
    general LyX inset. It's used to represent all the math objects.
    The formulaInset (a LyX inset) encapsulates a math inset.
*/
class MathedInset  {
public: 
	/** A math inset has a name (usually its LaTeX name),
	    type and font-size
	*/
	MathedInset(string const & nm, short ot, short st);
	///
	explicit
	MathedInset(MathedInset *);
	///
	virtual ~MathedInset() {}
	/// Draw the object
	virtual void draw(Painter &, int x, int baseline) = 0;	
	/// Write LaTeX and Lyx code
	virtual void Write(std::ostream &, bool fragile) = 0;
	/// Reproduces itself
	virtual MathedInset * Clone() = 0;
	/// Compute the size of the object
	virtual void Metrics() = 0; 
	/// 
	virtual int Ascent() const;
	///
	virtual int Descent() const;
	///
	virtual int Width() const;
	///
	virtual int Height() const;
	///
	virtual bool GetLimits() const;
	///
	virtual void SetLimits(bool);
	///
	string const & GetName() const;
	///
	short GetType() const;
	///
	short GetStyle() const;
	//Man:  Avoid to use these functions if it's not strictly necessary 
	///
	virtual void  SetType(short t);
	///
	virtual void  SetStyle(short st);
	///
	virtual void  SetName(string const & n);
	///
	static int workWidth;
	///
	static void defaultAscent(int da);
	///
	static void defaultDescent(int dd);
	///
	static void defaultWidth(int dw);
	///
	short size() const {
		return size_;
	}
protected:
	///
	string name;
	///
	short objtype;
	///
	int width;
	///
	int ascent;
	///
	int descent;
	/// Default metrics
	static int df_asc;
	///
	static int df_des;
	///
	static int df_width;
	/// In a near future maybe we use a better fonts renderer than X
	void drawStr(Painter &, short, int, int, int, string const &);
	///
	void size(short s) {
		size_ = s;
	}
	void incSize() {
		++size_;
	}
private:
	///
	short size_;
};
#endif