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
31 #include "math_xdata.h"
32 #include "math_defs.h"
36 Abstract base class for all math objects. A math insets is for use of the
37 math editor only, it isn't a general LyX inset. It's used to represent all
40 Math insets do not know there parents, a cursor position or things
41 like that. The are dumb object that are contained in other math insets
42 (mathNestInsets, in fact) thus forming a tree. The root of this tree is
43 always a mathHullInset, which provides an interface to the Outer World by
44 inclusion in the "real LyX insets" FormulaInset and FormulaMacroInset.
57 class MathMatrixInset;
59 class MathScriptInset;
60 class MathStringInset;
62 class MathSymbolInset;
74 class MathMacroTemplate;
80 /// short of anything else reasonable
81 typedef MathArray::size_type size_type;
82 /// type for cursor positions differences within a cell
83 typedef MathArray::difference_type difference_type;
84 /// type for cursor positions within a cell
85 typedef MathArray::size_type pos_type;
86 /// type for cell indices
87 typedef size_type idx_type;
88 /// type for row numbers
89 typedef size_type row_type;
90 /// type for column numbers
91 typedef size_type col_type;
93 /// our members behave nicely...
95 /// the virtual base destructor
96 virtual ~MathInset() {}
99 virtual void draw(Painter &, int x, int y) const;
100 /// write LaTeX and Lyx code
101 virtual void write(WriteStream & os) const;
103 virtual MathInset * clone() const = 0;
104 /// substitutes macro arguments if necessary
105 virtual void substitute(MathMacro const & macro);
106 /// compute the size of the object, sets ascend_, descend_ and width_
107 // updates the (xo,yo)-caches of all contained cells
108 virtual void metrics(MathMetricsInfo const & st) const;
109 /// the ascent of the inset above the baseline
110 virtual int ascent() const { return 1; }
111 /// the descent of the inset below the baseline
112 virtual int descent() const { return 1; }
114 virtual int width() const { return 2; }
115 /// total height (== ascent + descent)
116 virtual int height() const;
118 /// Where should we go when we press the up cursor key?
119 virtual bool idxUp(idx_type & idx) const;
121 virtual bool idxDown(idx_type & idx) const;
123 virtual bool idxLeft(idx_type & idx, pos_type & pos) const;
125 virtual bool idxRight(idx_type & idx, pos_type & pos) const;
127 /// Move one physical cell up
128 virtual bool idxNext(idx_type & idx, pos_type & pos) const;
129 /// Move one physical cell down
130 virtual bool idxPrev(idx_type & idx, pos_type & pos) const;
132 /// Target pos when we enter the inset from the left by pressing "Right"
133 virtual bool idxFirst(idx_type & idx, pos_type & pos) const;
134 /// Target pos when we enter the inset from the right by pressing "Left"
135 virtual bool idxLast(idx_type & idx, pos_type & pos) const;
137 /// Where should we go if we press home?
138 virtual bool idxHome(idx_type & idx, pos_type & pos) const;
139 /// Where should we go if we press end?
140 virtual bool idxEnd(idx_type & idx, pos_type & pos) const;
142 /// Delete a cell and move cursor
143 // the return value indicates whether the cursor should leave the inset
144 // and/or the whole inset should be deleted
145 virtual void idxDelete(idx_type & idx, bool & popit, bool & deleteit);
146 // deletes a cell range and moves the cursor
147 virtual void idxDeleteRange(idx_type from, idx_type to);
148 // returns list of cell indices that are "between" from and to for
149 // selection purposes
150 virtual std::vector<idx_type> idxBetween(idx_type from, idx_type to) const;
152 /// the number of nested cells this inset owns
153 virtual idx_type nargs() const;
155 /// return cell given its number
156 virtual MathArray & cell(idx_type);
157 /// return cell given its number
158 virtual MathArray const & cell(idx_type) const;
159 /// return cell plus drawing cache given its number
160 virtual MathXArray & xcell(idx_type);
161 /// return cell plus drawing cache given its number
162 virtual MathXArray const & xcell(idx_type) const;
164 /// the number of columns of this inset if it is grid-like
165 virtual col_type ncols() const { return 1; }
166 /// the number of rows of this inset if it is grid-like
167 virtual row_type nrows() const { return 1; }
168 /// to which column belongs a cell with a given index?
169 virtual col_type col(idx_type) const { return 0; }
170 /// to which row belongs a cell with a given index?
171 virtual row_type row(idx_type) const { return 0; }
172 /// cell idex corresponding to row and column;
173 virtual idx_type index(row_type row, col_type col) const;
174 /// any additional x-offset when drawing a cell?
175 virtual int cellXOffset(idx_type) const { return 0; }
176 /// any additional y-offset when drawing a cell?
177 virtual int cellYOffset(idx_type) const { return 0; }
179 /// identifies certain types of insets
180 virtual MathArrayInset * asArrayInset() { return 0; }
181 virtual MathBoxInset * asBoxInset() { return 0; }
182 virtual MathBoxInset const * asBoxInset() const { return 0; }
183 virtual MathCharInset const * asCharInset() const { return 0; }
184 virtual MathDelimInset * asDelimInset() { return 0; }
185 virtual MathDelimInset const * asDelimInset() const { return 0; }
186 virtual MathFuncInset * asFuncInset() { return 0; }
187 virtual MathFracInset * asFracInset() { return 0; }
188 virtual MathGridInset * asGridInset() { return 0; }
189 virtual MathHullInset * asHullInset() { return 0; }
190 virtual MathHullInset const * asHullInset() const { return 0; }
191 virtual MathMacroTemplate * asMacroTemplate() { return 0; }
192 virtual MathMatrixInset const * asMatrixInset() const { return 0; }
193 virtual MathNestInset * asNestInset() { return 0; }
194 virtual MathScriptInset * asScriptInset() { return 0; }
195 virtual MathScriptInset const * asScriptInset() const { return 0; }
196 virtual MathSpaceInset * asSpaceInset() { return 0; }
197 virtual MathStringInset * asStringInset() { return 0; }
198 virtual MathSymbolInset const * asSymbolInset() const { return 0; }
199 virtual UpdatableInset * asHyperActiveInset() const { return 0; }
201 /// identifies things that can get scripts
202 virtual bool isScriptable() const { return false; }
203 /// thing that can be moved into
204 virtual bool isActive() const { return nargs() > 0; }
205 /// identifies insets from the outer world
206 virtual bool isHyperActive() const { return 0; }
207 /// is the a relational operator (used for splitting equations)
208 virtual bool isRelOp() const { return false; }
210 /// return the content as char if the inset is able to do so
211 virtual char getChar() const { return 0; }
212 /// return the content's char code if it has one
213 virtual MathTextCodes code() const { return LM_TC_MIN; }
214 /// identifies things that can get \limits or \nolimits
215 virtual bool takesLimits() const { return false; }
218 virtual void edit(BufferView *, int, int, unsigned int) {}
220 /// request "external features"
221 virtual void validate(LaTeXFeatures & features) const;
222 /// char char code if possible
223 virtual void handleFont(MathTextCodes) {}
224 /// is this inset equal to a given other inset?
225 virtual bool match(MathInset *) const { return false; }
226 /// replace things by other things
227 virtual void replace(ReplaceData &) {}
229 /// write normalized content
230 virtual void normalize(NormalStream &) const;
231 /// write content as something readable by Maple
232 virtual void maplize(MapleStream &) const;
233 /// write content as something resembling MathML
234 virtual void mathmlize(MathMLStream &) const;
235 /// write content as something readable by Octave
236 virtual void octavize(OctaveStream &) const;
238 /// dump content to stderr for debugging
239 virtual void dump() const;
242 std::ostream & operator<<(std::ostream &, MathInset const &);