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math_inset.h
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C/C++ Source or Header
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1998-04-23
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7KB
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386 lines
// -*- 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: (c) 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 <stdio.h>
#include "math_defs.h"
#include "symbol_def.h"
#include "LString.h"
/**
Functions or LaTeX names for objects that I don't know how to draw.
*/
class MathFuncInset: public MathedInset {
public:
///
MathFuncInset(char const *nm, short ot=LM_OT_FUNC, short st=LM_ST_TEXT);
///
~MathFuncInset();
///
MathedInset *Clone();
///
void Draw(int, int);
///
void Write(FILE *file);
///
void Write(LString &file);
///
void Metrics();
///
inline bool GetLimits() const;
protected:
///
int ln;
///
bool lims;
///
char *fname;
};
/// Accents
class MathAccentInset: public MathedInset {
public:
///
MathAccentInset(byte, MathedTextCodes, int, short st=LM_ST_TEXT);
///
MathAccentInset(MathedInset *, int, short st=LM_ST_TEXT);
///
~MathAccentInset();
///
MathedInset *Clone();
///
void Draw(int, int);
///
void Write(FILE *file);
///
void Write(LString &file);
///
void Metrics();
///
int getAccentCode() const { return code; }
protected:
///
byte c;
///
MathedTextCodes fn;
///
int code;
///
MathedInset *inset;
///
int dh, dy;
};
///
class MathDotsInset: public MathedInset {
public:
///
MathDotsInset(char const*,int,short st=LM_ST_TEXT);
///
~MathDotsInset() { };
///
MathedInset *Clone();
///
void Draw(int, int);
///
void Write(FILE *file);
///
void Write(LString &file);
///
void Metrics();
protected:
///
int dh, code;
};
/// Smart spaces
class MathSpaceInset: public MathedInset {
public:
///
MathSpaceInset(int sp, short ot=LM_OT_SPACE, short st=LM_ST_TEXT);
///
~MathSpaceInset() { };
///
MathedInset *Clone();
///
void Draw(int, int);
///
void Write(FILE *file);
///
void Write(LString &file);
///
inline void Metrics();
///
inline void SetSpace(int sp);
///
int GetSpace() { return space; }
protected:
///
int space;
};
/// big operators
class MathBigopInset: public MathedInset {
public:
///
MathBigopInset(char const*, int, short st=LM_ST_TEXT);
///
~MathBigopInset() { };
///
MathedInset *Clone();
///
void Draw(int, int);
///
void Write(FILE *file);
///
void Write(LString &file);
///
void Metrics();
///
inline bool GetLimits() const;
///
inline void SetLimits(bool);
protected:
///
int lims;
///
int sym;
};
//------- All editable insets must be derived from MathParInset.
///
class MathSqrtInset: public MathParInset {
public:
///
MathSqrtInset(short st=LM_ST_TEXT);
///
~MathSqrtInset() { };
///
MathedInset *Clone();
///
void Draw(int x, int baseline);
///
void Write(FILE *file);
///
void Write(LString &file);
///
void Metrics();
///
bool Inside(int, int);
private:
///
short hmax;
};
/// Fraction like objects (frac, stackrel, binom)
class MathFracInset: public MathParInset {
public:
///
MathFracInset(short ot=LM_OT_FRAC);
///
~MathFracInset();
///
MathedInset *Clone();
///
void Draw(int x, int baseline);
///
void Write(FILE *file);
///
void Write(LString &file);
///
void Metrics();
/** This does the same that SetData(LyxArrayBase*) but for both
numerator and denominator at once.
*/
void SetData(LyxArrayBase*, LyxArrayBase*);
///
void SetData(LyxArrayBase*);
///
void GetXY(int& x, int& y) const;
///
void SetFocus(int,int);
///
bool Inside(int, int);
///
LyxArrayBase * GetData();
///
bool setArgumentIdx(int i); // was bool Up/down(void);
///
int getArgumentIdx() { return (int)idx; }
///
int getMaxArgumentIdx() { return 1; }
///
void SetStyle(short);
protected:
///
short idx;
///
MathParInset *den;
///
int w0, w1, des0, dh;
};
/// A delimiter
class MathDelimInset: public MathParInset {
public:
///
MathDelimInset(int, int, short st=LM_ST_TEXT);
///
~MathDelimInset() { };
///
MathedInset *Clone();
///
void Draw(int, int);
///
void Write(FILE *file);
///
void Write(LString &file);
///
void Metrics();
protected:
///
int left, right;
///
int dw, dh;
};
/// Decorations over (below) a math object
class MathDecorationInset: public MathParInset {
public:
///
MathDecorationInset(int, short st=LM_ST_TEXT);
///
~MathDecorationInset() { };
///
MathedInset *Clone();
///
void Draw(int, int);
///
void Write(FILE *file);
///
void Write(LString &file);
///
void Metrics();
///
inline bool GetLimits() const;
protected:
///
int deco;
///
bool upper;
///
int dw, dh, dy;
};
// -------------------- Inline functions ---------------------
inline
MathFuncInset::~MathFuncInset()
{
if (fname && GetType()==LM_OT_UNDEF) delete[] fname;
}
inline
bool MathFuncInset::GetLimits() const
{
return (bool)(lims && (GetStyle()==LM_ST_DISPLAY));
}
inline
void MathFuncInset::Write(FILE *file)
{
fprintf(file, "\\%s ", name);
}
inline
void MathFuncInset::Write(LString &file)
{
file += '\\';
file += name;
file += ' ';
}
inline
void MathSpaceInset::Metrics()
{
width = (space) ? space*2: 2;
if (space>3) width *= 2;
if (space==5) width *= 2;
width += 4;
ascent = 4; descent = 0;
}
inline
void MathSpaceInset::SetSpace(int sp)
{
space = sp;
Metrics();
}
inline
bool MathBigopInset::GetLimits() const
{
// Default case
if (lims<0) {
return (bool)(sym!=LM_int && sym!=LM_oint && (GetStyle()==LM_ST_DISPLAY));
}
// Custom
return (bool)(lims>0);
}
inline
void MathBigopInset::SetLimits(bool ls)
{
lims = (ls) ? 1: 0;
}
inline
bool MathDecorationInset::GetLimits() const
{
return (bool)(deco==LM_underbrace||deco==LM_overbrace);
}
#endif