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compiler *sigh* git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@2804 a592a061-630c-0410-9148-cb99ea01b6c8
228 lines
6.4 KiB
C++
228 lines
6.4 KiB
C++
// -*- C++ -*-
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/*
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* File: math_inset.h
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* Purpose: Declaration of insets for mathed
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* Author: Alejandro Aguilar Sierra <asierra@servidor.unam.mx>
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* Created: January 1996
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* Description: Math paragraph and objects for a WYSIWYG math editor.
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*
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* Dependencies: Xlib, XForms
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*
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* Copyright: 1996, 1997 Alejandro Aguilar Sierra
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*
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* Version: 0.8beta, Math & Lyx project.
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*
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* You are free to use and modify this code under the terms of
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* the GNU General Public Licence version 2 or later.
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*/
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// Note: These math insets are internal to Math and are not derived
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// from lyx inset.
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#ifndef MATH_INSET_H
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#define MATH_INSET_H
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#include <config.h>
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#ifdef __GNUG__
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#pragma interface
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#endif
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#include "xarray.h"
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/** Abstract base class for all math objects.
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A math insets is for use of the math editor only, it isn't a
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general LyX inset. It's used to represent all the math objects.
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The formulaInset (a LyX inset) encapsulates a math inset.
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*/
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class LaTeXFeatures;
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class MathCharInset;
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class MathScriptInset;
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class MathInset {
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public:
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/// short of anything else reasonable
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typedef MathArray::size_type size_type;
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/// type for cursor positions within a cell
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typedef MathArray::size_type pos_type;
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/// type for cell indices
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typedef size_type idx_type;
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/// type for row numbers
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typedef size_type row_type;
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/// type for column numbers
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typedef size_type col_type;
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///
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MathInset();
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/// the virtual base destructor
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virtual ~MathInset();
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/// draw the object, sets xo_ and yo_ cached values
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virtual void draw(Painter &, int x, int y) const;
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/// write LaTeX and Lyx code
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virtual void write(std::ostream &, bool fragile) const;
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/// write normalized content
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virtual void writeNormal(std::ostream &) const;
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/// reproduce itself
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virtual MathInset * clone() const = 0;
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///substitutes macro arguments if necessary
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virtual void substitute(MathMacro const & macro);
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/// compute the size of the object, sets ascend_, descend_ and width_
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virtual void metrics(MathStyles st) const;
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///
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virtual int ascent() const { return 1; }
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///
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virtual int descent() const { return 1; }
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///
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virtual int width() const { return 2; }
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///
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virtual int height() const;
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///
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virtual MathStyles size() const;
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/// Where should we go when we press the up cursor key?
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virtual bool idxUp(idx_type & idx, pos_type & pos) const;
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/// The down key
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virtual bool idxDown(idx_type & idx, pos_type & pos) const;
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/// The left key
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virtual bool idxLeft(idx_type & idx, pos_type & pos) const;
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/// The right key
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virtual bool idxRight(idx_type & idx, pos_type & pos) const;
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/// Move one physical cell up
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virtual bool idxNext(idx_type & idx, pos_type & pos) const;
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/// Move one physical cell down
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virtual bool idxPrev(idx_type & idx, pos_type & pos) const;
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/// Target pos when we enter the inset from the left by pressing "Right"
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virtual bool idxFirst(idx_type & idx, pos_type & pos) const;
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/// Target pos when we enter the inset from the right by pressing "Left"
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virtual bool idxLast(idx_type & idx, pos_type & pos) const;
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/// Where should we go if we press home?
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virtual bool idxHome(idx_type & idx, pos_type & pos) const;
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/// Where should we go if we press end?
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virtual bool idxEnd(idx_type & idx, pos_type & pos) const;
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/// Delete a cell and move cursor
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// the return value indicates whether the cursor should leave the inset
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// and/or the whole inset should be deleted
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virtual void idxDelete(idx_type & idx, bool & popit, bool & deleteit);
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// deletes a cell range and moves the cursor
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virtual void idxDeleteRange(idx_type from, idx_type to);
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// returns list of cell indices that are "between" from and to for
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// selection purposes
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virtual std::vector<idx_type> idxBetween(idx_type from, idx_type to) const;
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///
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virtual idx_type nargs() const;
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///
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virtual MathArray & cell(idx_type);
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///
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virtual MathArray const & cell(idx_type) const;
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///
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virtual MathXArray & xcell(idx_type);
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///
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virtual MathXArray const & xcell(idx_type) const;
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///
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virtual int xo() const;
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///
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virtual int yo() const;
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///
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virtual void xo(int tx) const;
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///
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virtual void yo(int ty) const;
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///
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///
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virtual col_type ncols() const { return 1; }
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///
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virtual row_type nrows() const { return 1; }
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///
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virtual col_type col(row_type) const { return 0; }
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///
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virtual row_type row(row_type) const { return 0; }
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///
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virtual int cellXOffset(row_type) const { return 0; }
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///
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virtual int cellYOffset(row_type) const { return 0; }
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///
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virtual void addRow(row_type) {}
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///
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virtual void delRow(row_type) {}
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///
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virtual void addCol(col_type) {}
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///
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virtual void delCol(col_type) {}
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///
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virtual void userSetSize(MathStyles &) {}
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///
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virtual void getXY(int & x, int & y) const;
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///
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virtual bool covers(int x, int y) const;
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/// identifies things that can get scripts
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virtual bool isScriptable() const { return false; }
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/// identifies ScriptInsets
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virtual bool isScriptInset() const { return false; }
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/// identifies SpaceInsets
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virtual bool isSpaceInset() const { return false; }
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/// identifies GridInsets
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virtual bool isGrid() const { return false; }
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/// identifies ArrayInsets
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virtual bool isArray() const { return false; }
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/// identifies CharInsets
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virtual MathCharInset const * asCharInset() const { return 0; }
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/// identifies ScriptInsets
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virtual MathScriptInset const * asScriptInset() const { return 0; }
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///
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virtual bool isActive() const { return nargs() > 0; }
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///
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virtual bool isRelOp() const { return false; }
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///
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virtual bool isMacro() const { return false; }
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///
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virtual char getChar() const { return 0; }
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///
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virtual MathTextCodes code() const { return LM_TC_MIN; }
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/// identifies things that can get \limits or \nolimits
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virtual bool takesLimits() const { return false; }
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///
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virtual void push_back(MathInset *);
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///
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virtual void push_back(unsigned char c, MathTextCodes code);
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///
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virtual void dump() const;
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///
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virtual void validate(LaTeXFeatures & features) const;
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///
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virtual void handleFont(MathTextCodes) {}
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///
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static int workwidth;
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protected:
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/// _sets_ style
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void size(MathStyles s) const;
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/// the used font size
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mutable MathStyles size_;
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private:
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/// the following are used for positioning the cursor with the mouse
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/// cached cursor start position in pixels from the document left
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mutable int xo_;
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/// cached cursor start position in pixels from the document top
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mutable int yo_;
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};
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std::ostream & operator<<(std::ostream &, MathInset const &);
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#endif
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