4 * Purpose: Declaration of insets for mathed
5 * Author: Alejandro Aguilar Sierra <asierra@servidor.unam.mx>
6 * Created: January 1996
7 * Description: Math paragraph and objects for a WYSIWYG math editor.
9 * Dependencies: Xlib, XForms
11 * Copyright: 1996, 1997 Alejandro Aguilar Sierra
13 * Version: 0.8beta, Math & Lyx project.
15 * You are free to use and modify this code under the terms of
16 * the GNU General Public Licence version 2 or later.
19 // Note: These math insets are internal to Math and are not derived
33 /** Abstract base class for all math objects.
34 A math insets is for use of the math editor only, it isn't a
35 general LyX inset. It's used to represent all the math objects.
36 The formulaInset (a LyX inset) encapsulates a math inset.
42 class MathScriptInset;
47 typedef MathArray::size_type size_type;
51 /// the virtual base destructor
54 /// draw the object, sets xo_ and yo_ cached values
55 virtual void draw(Painter &, int x, int y) const;
56 /// write LaTeX and Lyx code
57 virtual void write(std::ostream &, bool fragile) const;
58 /// write normalized content
59 virtual void writeNormal(std::ostream &) const;
61 virtual MathInset * clone() const = 0;
62 ///substitutes macro arguments if necessary
63 virtual void substitute(MathMacro const & macro);
64 /// compute the size of the object, sets ascend_, descend_ and width_
65 virtual void metrics(MathStyles st) const;
67 virtual int ascent() const { return 1; }
69 virtual int descent() const { return 1; }
71 virtual int width() const { return 2; }
73 virtual int height() const;
75 virtual MathStyles size() const;
77 /// Where should we go when we press the up cursor key?
78 virtual bool idxUp(int & idx, int & pos) const;
80 virtual bool idxDown(int & idx, int & pos) const;
82 virtual bool idxLeft(int & idx, int & pos) const;
84 virtual bool idxRight(int & idx, int & pos) const;
86 /// Move one physical cell up
87 virtual bool idxNext(int & idx, int & pos) const;
88 /// Move one physical cell down
89 virtual bool idxPrev(int & idx, int & pos) const;
91 /// Target pos when we enter the inset from the left by pressing "Right"
92 virtual bool idxFirst(int & idx, int & pos) const;
93 /// Target pos when we enter the inset from the left by pressing "Up"
94 virtual bool idxFirstUp(int & idx, int & pos) const;
95 /// Target pos when we enter the inset from the left by pressing "Down"
96 virtual bool idxFirstDown(int & idx, int & pos) const;
98 /// Target pos when we enter the inset from the right by pressing "Left"
99 virtual bool idxLast(int & idx, int & pos) const;
100 /// Target pos when we enter the inset from the right by pressing "Up"
101 virtual bool idxLastUp(int & idx, int & pos) const;
102 /// Target pos when we enter the inset from the right by pressing "Down"
103 virtual bool idxLastDown(int & idx, int & pos) const;
105 /// Where should we go if we press home?
106 virtual bool idxHome(int & idx, int & pos) const;
107 /// Where should we go if we press end?
108 virtual bool idxEnd(int & idx, int & pos) const;
110 /// Delete a cell and move cursor
111 // the return value indicates whether the cursor should leave the inset
112 // and/or the whole inset should be deleted
113 virtual void idxDelete(int & idx, bool & popit, bool & deleteit);
114 // deletes a cell range and moves the cursor
115 virtual void idxDeleteRange(int from, int to);
116 // returns list of cell indices that are "between" from and to for
117 // selection purposes
118 virtual std::vector<int> idxBetween(int from, int to) const;
121 virtual int nargs() const;
124 virtual MathArray & cell(int);
126 virtual MathArray const & cell(int) const;
128 virtual MathXArray & xcell(int);
130 virtual MathXArray const & xcell(int) const;
133 virtual int xo() const;
135 virtual int yo() const;
137 virtual void xo(int tx) const;
139 virtual void yo(int ty) const;
143 virtual int ncols() const { return 1; }
145 virtual int nrows() const { return 1; }
147 virtual int col(int) const { return 0; }
149 virtual int row(int) const { return 0; }
151 virtual int cellXOffset(int) const { return 0; }
153 virtual int cellYOffset(int) const { return 0; }
155 virtual void addRow(int) {}
157 virtual void delRow(int) {}
159 virtual void addCol(int) {}
161 virtual void delCol(int) {}
164 virtual void userSetSize(MathStyles &) {}
167 virtual void getXY(int & x, int & y) const;
169 virtual bool covers(int x, int y) const;
170 /// identifies things that can get scripts
171 virtual bool isScriptable() const { return false; }
172 /// identifies ScriptInsets
173 virtual bool isScriptInset() const { return false; }
174 /// identifies SpaceInsets
175 virtual bool isSpaceInset() const { return false; }
176 /// identifies GridInsets
177 virtual bool isGrid() const { return false; }
178 /// identifies ArrayInsets
179 virtual bool isArray() const { return false; }
180 /// identifies Charinsets
181 virtual MathCharInset const * asCharInset() const { return 0; }
183 virtual bool isActive() const { return nargs() > 0; }
185 virtual bool isRelOp() const { return false; }
187 virtual bool isMacro() const { return false; }
189 virtual char getChar() const { return 0; }
191 virtual MathTextCodes code() const { return LM_TC_MIN; }
192 /// identifies things that can get \limits or \nolimits
193 virtual bool takesLimits() const { return false; }
196 virtual void push_back(MathInset *);
198 virtual void push_back(unsigned char c, MathTextCodes code);
200 virtual void dump() const;
203 virtual void validate(LaTeXFeatures & features) const;
205 virtual void handleFont(MathTextCodes) {}
208 static int workwidth;
212 void size(MathStyles s) const;
213 /// the used font size
214 mutable MathStyles size_;
217 /// the following are used for positioning the cursor with the mouse
218 /// cached cursor start position in pixels from the document left
220 /// cached cursor start position in pixels from the document top
224 std::ostream & operator<<(std::ostream &, MathInset const &);