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.
58 class MathMatrixInset;
60 class MathScriptInset;
61 class MathStringInset;
63 class MathSymbolInset;
64 class MathUnknownInset;
65 class MathXYMatrixInset;
78 class MathMacroTemplate;
84 /// short of anything else reasonable
85 typedef MathArray::size_type size_type;
86 /// type for cursor positions differences within a cell
87 typedef MathArray::difference_type difference_type;
88 /// type for cursor positions within a cell
89 typedef MathArray::size_type pos_type;
90 /// type for cell indices
91 typedef size_type idx_type;
92 /// type for row numbers
93 typedef size_type row_type;
94 /// type for column numbers
95 typedef size_type col_type;
97 /// our members behave nicely...
99 /// the virtual base destructor
100 virtual ~MathInset() {}
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;
110 virtual void draw(Painter &, int x, int y) const;
111 /// the ascent of the inset above the baseline
112 /// compute the size of the object for text based drawing
113 virtual void metricsT(TextMetricsInfo const & st) const;
114 /// draw the object as text
115 virtual void drawT(TextPainter &, int x, int y) const;
116 /// the ascent of the inset above the baseline
117 virtual int ascent() const { return 1; }
118 /// the descent of the inset below the baseline
119 virtual int descent() const { return 1; }
121 virtual int width() const { return 2; }
122 /// total height (== ascent + descent)
123 virtual int height() const;
125 /// Where should we go when we press the up or down cursor key?
126 virtual bool idxUpDown(idx_type & idx, bool up) const;
128 virtual bool idxLeft(idx_type & idx, pos_type & pos) const;
130 virtual bool idxRight(idx_type & idx, pos_type & pos) const;
132 /// Move one physical cell up
133 virtual bool idxNext(idx_type & idx, pos_type & pos) const;
134 /// Move one physical cell down
135 virtual bool idxPrev(idx_type & idx, pos_type & pos) const;
137 /// Target pos when we enter the inset from the left by pressing "Right"
138 virtual bool idxFirst(idx_type & idx, pos_type & pos) const;
139 /// Target pos when we enter the inset from the right by pressing "Left"
140 virtual bool idxLast(idx_type & idx, pos_type & pos) const;
142 /// Where should we go if we press home?
143 virtual bool idxHome(idx_type & idx, pos_type & pos) const;
144 /// Where should we go if we press end?
145 virtual bool idxEnd(idx_type & idx, pos_type & pos) const;
147 /// Delete a cell and move cursor
148 virtual bool idxDelete(idx_type &) { return false; }
149 /// pulls cell after pressing erase
150 virtual void idxGlue(idx_type) {}
151 // returns list of cell indices that are "between" from and to for
152 // selection purposes
153 virtual std::vector<idx_type> idxBetween(idx_type from, idx_type to) const;
155 /// the number of nested cells this inset owns
156 virtual idx_type nargs() const;
158 /// return cell given its number
159 virtual MathArray & cell(idx_type);
160 /// return cell given its number
161 virtual MathArray const & cell(idx_type) const;
162 /// return cell plus drawing cache given its number
163 virtual MathXArray & xcell(idx_type);
164 /// return cell plus drawing cache given its number
165 virtual MathXArray const & xcell(idx_type) const;
167 /// the number of columns of this inset if it is grid-like
168 virtual col_type ncols() const { return 1; }
169 /// the number of rows of this inset if it is grid-like
170 virtual row_type nrows() const { return 1; }
171 /// to which column belongs a cell with a given index?
172 virtual col_type col(idx_type) const { return 0; }
173 /// to which row belongs a cell with a given index?
174 virtual row_type row(idx_type) const { return 0; }
175 /// cell idex corresponding to row and column;
176 virtual idx_type index(row_type row, col_type col) const;
177 /// any additional x-offset when drawing a cell?
178 virtual int cellXOffset(idx_type) const { return 0; }
179 /// any additional y-offset when drawing a cell?
180 virtual int cellYOffset(idx_type) const { return 0; }
181 /// can we enter this cell?
182 virtual bool validCell(idx_type) const { return true; }
184 /// identifies certain types of insets
185 virtual MathArrayInset * asArrayInset() { return 0; }
186 virtual MathBraceInset * asBraceInset() { return 0; }
187 virtual MathBoxInset * asBoxInset() { return 0; }
188 virtual MathBoxInset const * asBoxInset() const { return 0; }
189 virtual MathCharInset const * asCharInset() const { return 0; }
190 virtual MathDelimInset * asDelimInset() { return 0; }
191 virtual MathDelimInset const * asDelimInset() const { return 0; }
192 virtual MathFuncInset * asFuncInset() { return 0; }
193 virtual MathFracInset * asFracInset() { return 0; }
194 virtual MathGridInset * asGridInset() { return 0; }
195 virtual MathHullInset * asHullInset() { return 0; }
196 virtual MathHullInset const * asHullInset() const { return 0; }
197 virtual MathMacroTemplate * asMacroTemplate() { return 0; }
198 virtual MathMatrixInset const * asMatrixInset() const { return 0; }
199 virtual MathNestInset * asNestInset() { return 0; }
200 virtual MathScriptInset * asScriptInset() { return 0; }
201 virtual MathScriptInset const * asScriptInset() const { return 0; }
202 virtual MathSpaceInset * asSpaceInset() { return 0; }
203 virtual MathStringInset * asStringInset() { return 0; }
204 virtual MathSymbolInset const * asSymbolInset() const { return 0; }
205 virtual MathUnknownInset const * asUnknownInset() const { return 0; }
206 virtual MathXYMatrixInset const* asXYMatrixInset() const{ return 0; }
208 /// identifies things that can get scripts
209 virtual bool isScriptable() const { return false; }
210 /// thing that can be moved into
211 virtual bool isActive() const { return nargs() > 0; }
212 /// is the a relational operator (used for splitting equations)
213 virtual bool isRelOp() const { return false; }
215 /// return the content as char if the inset is able to do so
216 virtual char getChar() const { return 0; }
217 /// return the content's char code if it has one
218 virtual MathTextCodes code() const { return LM_TC_MIN; }
219 /// identifies things that can get \limits or \nolimits
220 virtual bool takesLimits() const { return false; }
221 /// identifies complicated things that need braces if used as arg
222 virtual bool needsBraces() const { return true; }
225 virtual void edit(BufferView *, int, int, unsigned int) {}
227 /// request "external features"
228 virtual void validate(LaTeXFeatures & features) const;
229 /// char char code if possible
230 virtual void handleFont(MathTextCodes) {}
231 /// is this inset equal to a given other inset?
232 virtual bool match(MathInset *) const { return false; }
233 /// replace things by other things
234 virtual void replace(ReplaceData &) {}
235 /// do we contain a given subsequence?
236 virtual bool contains(MathArray const &) { return false; }
238 /// write LaTeX and Lyx code
239 virtual void write(WriteStream & os) const;
240 /// write normalized content
241 virtual void normalize(NormalStream &) const;
242 /// write content as something readable by Maple
243 virtual void maplize(MapleStream &) const;
244 /// write content as something resembling MathML
245 virtual void mathmlize(MathMLStream &) const;
246 /// write content as something readable by Octave
247 virtual void octavize(OctaveStream &) const;
249 virtual void infoize(std::ostream &) const {}
251 /// dump content to stderr for debugging
252 virtual void dump() const;
255 std::ostream & operator<<(std::ostream &, MathInset const &);