// -*- C++ -*- /* * File: math_inset.h * Purpose: Declaration of insets for mathed * Author: Alejandro Aguilar Sierra * Created: January 1996 * Description: Math paragraph and objects for a WYSIWYG math editor. * * Dependencies: Xlib, XForms * * Copyright: 1996, 1997 Alejandro Aguilar Sierra * * Version: 0.8beta, Math & 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 Math and are not derived // from lyx inset. #ifndef MATH_INSET_H #define MATH_INSET_H #include #ifdef __GNUG__ #pragma interface #endif #include "math_xdata.h" #include "math_defs.h" /** Abstract base class for all math objects. A math insets is for use of the math editor only, it isn't a general LyX inset. It's used to represent all the math objects. Math insets do not know there parents, a cursor position or things like that. The are dumb object that are contained in other math insets (mathNestInsets, in fact) thus forming a tree. The root of this tree is always a mathHullInset, which provides an interface to the Outer World by inclusion in the "real LyX insets" FormulaInset and FormulaMacroInset. */ class MathArrayInset; class MathAMSArrayInset; class MathBraceInset; class MathBoxInset; class MathCharInset; class MathDelimInset; class MathFuncInset; class MathGridInset; class MathFracInset; class MathHullInset; class MathMatrixInset; class MathNestInset; class MathScriptInset; class MathStringInset; class MathSpaceInset; class MathSymbolInset; class MathUnknownInset; class MathXYMatrixInset; class NormalStream; class OctaveStream; class MapleStream; class MathMLStream; class WriteStream; class InfoStream; class MathArray; class LaTeXFeatures; class BufferView; class UpdatableInset; class MathMacroTemplate; class MathPosFinder; class MathInset { public: /// short of anything else reasonable typedef MathArray::size_type size_type; /// type for cursor positions differences within a cell typedef MathArray::difference_type difference_type; /// type for cursor positions within a cell typedef MathArray::size_type pos_type; /// type for cell indices typedef size_type idx_type; /// type for row numbers typedef size_type row_type; /// type for column numbers typedef size_type col_type; /// our members behave nicely... MathInset() {} /// the virtual base destructor virtual ~MathInset() {} /// reproduce itself virtual MathInset * clone() const = 0; /// substitutes macro arguments if necessary virtual void substitute(MathMacro const & macro); /// compute the size of the object, sets ascend_, descend_ and width_ // updates the (xo,yo)-caches of all contained cells virtual void metrics(MathMetricsInfo const & st) const; /// draw the object virtual void draw(Painter &, int x, int y) const; /// the ascent of the inset above the baseline /// compute the size of the object for text based drawing virtual void metricsT(TextMetricsInfo const & st) const; /// draw the object as text virtual void drawT(TextPainter &, int x, int y) const; /// the ascent of the inset above the baseline virtual int ascent() const { return 1; } /// the descent of the inset below the baseline virtual int descent() const { return 1; } /// total width virtual int width() const { return 2; } /// total height (== ascent + descent) virtual int height() const; /// Where should we go when we press the up or down cursor key? virtual bool idxUpDown(idx_type & idx, bool up) const; /// The left key virtual bool idxLeft(idx_type & idx, pos_type & pos) const; /// The right key virtual bool idxRight(idx_type & idx, pos_type & pos) const; /// Move one physical cell up virtual bool idxNext(idx_type & idx, pos_type & pos) const; /// Move one physical cell down virtual bool idxPrev(idx_type & idx, pos_type & pos) const; /// Target pos when we enter the inset from the left by pressing "Right" virtual bool idxFirst(idx_type & idx, pos_type & pos) const; /// Target pos when we enter the inset from the right by pressing "Left" virtual bool idxLast(idx_type & idx, pos_type & pos) const; /// Where should we go if we press home? virtual bool idxHome(idx_type & idx, pos_type & pos) const; /// Where should we go if we press end? virtual bool idxEnd(idx_type & idx, pos_type & pos) const; /// Delete a cell and move cursor virtual bool idxDelete(idx_type &) { return false; } /// pulls cell after pressing erase virtual void idxGlue(idx_type) {} // returns list of cell indices that are "between" from and to for // selection purposes virtual std::vector idxBetween(idx_type from, idx_type to) const; /// the number of nested cells this inset owns virtual idx_type nargs() const; /// return cell given its number virtual MathArray & cell(idx_type); /// return cell given its number virtual MathArray const & cell(idx_type) const; /// return cell plus drawing cache given its number virtual MathXArray & xcell(idx_type); /// return cell plus drawing cache given its number virtual MathXArray const & xcell(idx_type) const; /// the number of columns of this inset if it is grid-like virtual col_type ncols() const { return 1; } /// the number of rows of this inset if it is grid-like virtual row_type nrows() const { return 1; } /// to which column belongs a cell with a given index? virtual col_type col(idx_type) const { return 0; } /// to which row belongs a cell with a given index? virtual row_type row(idx_type) const { return 0; } /// cell idex corresponding to row and column; virtual idx_type index(row_type row, col_type col) const; /// any additional x-offset when drawing a cell? virtual int cellXOffset(idx_type) const { return 0; } /// any additional y-offset when drawing a cell? virtual int cellYOffset(idx_type) const { return 0; } /// can we enter this cell? virtual bool validCell(idx_type) const { return true; } /// identifies certain types of insets virtual MathAMSArrayInset * asAMSArrayInset() { return 0; } virtual MathArrayInset * asArrayInset() { return 0; } virtual MathBraceInset * asBraceInset() { return 0; } virtual MathBoxInset * asBoxInset() { return 0; } virtual MathBoxInset const * asBoxInset() const { return 0; } virtual MathCharInset const * asCharInset() const { return 0; } virtual MathDelimInset * asDelimInset() { return 0; } virtual MathDelimInset const * asDelimInset() const { return 0; } virtual MathFuncInset * asFuncInset() { return 0; } virtual MathFracInset * asFracInset() { return 0; } virtual MathGridInset * asGridInset() { return 0; } virtual MathHullInset * asHullInset() { return 0; } virtual MathHullInset const * asHullInset() const { return 0; } virtual MathMacroTemplate * asMacroTemplate() { return 0; } virtual MathMatrixInset const * asMatrixInset() const { return 0; } virtual MathNestInset * asNestInset() { return 0; } virtual MathScriptInset * asScriptInset() { return 0; } virtual MathScriptInset const * asScriptInset() const { return 0; } virtual MathSpaceInset * asSpaceInset() { return 0; } virtual MathStringInset * asStringInset() { return 0; } virtual MathSymbolInset const * asSymbolInset() const { return 0; } virtual MathUnknownInset const * asUnknownInset() const { return 0; } virtual MathXYMatrixInset const* asXYMatrixInset() const{ return 0; } /// identifies things that can get scripts virtual bool isScriptable() const { return false; } /// thing that can be moved into virtual bool isActive() const { return nargs() > 0; } /// is the a relational operator (used for splitting equations) virtual bool isRelOp() const { return false; } /// return the content as char if the inset is able to do so virtual char getChar() const { return 0; } /// return the content's char code if it has one virtual MathTextCodes code() const { return LM_TC_MIN; } /// identifies things that can get \limits or \nolimits virtual bool takesLimits() const { return false; } /// identifies complicated things that need braces if used as arg virtual bool needsBraces() const { return true; } /// virtual void edit(BufferView *, int, int, unsigned int) {} /// request "external features" virtual void validate(LaTeXFeatures & features) const; /// char char code if possible virtual void handleFont(MathTextCodes) {} /// is this inset equal to a given other inset? virtual bool match(MathInset *) const { return false; } /// replace things by other things virtual void replace(ReplaceData &) {} /// do we contain a given subsequence? virtual bool contains(MathArray const &) { return false; } /// write LaTeX and Lyx code virtual void write(WriteStream & os) const; /// write normalized content virtual void normalize(NormalStream &) const; /// write content as something readable by Maple virtual void maplize(MapleStream &) const; /// write content as something resembling MathML virtual void mathmlize(MathMLStream &) const; /// write content as something readable by Octave virtual void octavize(OctaveStream &) const; /// describe content virtual void infoize(std::ostream &) const {} /// dump content to stderr for debugging virtual void dump() const; }; std::ostream & operator<<(std::ostream &, MathInset const &); #endif