src/mathed/InsetMathGrid.h

   1 // -*- C++ -*-
   2 /**
   3  * \file InsetMathGrid.h
   4  * This file is part of LyX, the document processor.
   5  * Licence details can be found in the file COPYING.
   6  *
   7  * \author André Pönitz
   8  *
   9  * Full author contact details are available in file CREDITS.
  10  */
  11
  12 #ifndef MATH_GRID_H
  13 #define MATH_GRID_H
  14
  15 #include "InsetMathNest.h"
  16 #include "Length.h"
  17
  18
  19 namespace lyx {
  20
  21
  22 /** Gridded math inset base class.
  23  *  This is the base to all grid-like editable math objects
  24  */
  25 class InsetMathGrid : public InsetMathNest {
  26 public:
  27
  28         /// additional per-cell information
  29         class CellInfo {
  30         public:
  31                 ///
  32                 CellInfo();
  33                 /// a dummy cell before a multicolumn cell
  34                 int dummy_;
  35                 /// special multi colums alignment
  36                 docstring align_;
  37                 /// these should be a per-cell property, but ok to have it here
  38                 /// for single-column grids like paragraphs
  39                 mutable int glue_;
  40                 ///
  41                 mutable pos_type begin_;
  42                 ///
  43                 mutable pos_type end_;
  44         };
  45
  46         /// additional per-row information
  47         class RowInfo {
  48         public:
  49                 ///
  50                 RowInfo();
  51                 ///
  52                 int skipPixels(MetricsInfo const & mi) const;
  53                 /// cached descent
  54                 mutable int descent_;
  55                 /// cached ascent
  56                 mutable int ascent_;
  57                 /// cached offset
  58                 mutable int offset_;
  59                 /// how many hlines above this row?
  60                 unsigned int lines_;
  61                 /// parameter to the line break
  62                 Length crskip_;
  63                 /// extra distance between lines
  64                 int skip_;
  65                 /// Is a page break allowed after this row?
  66                 bool allow_newpage_;
  67         };
  68
  69         // additional per-row information
  70         class ColInfo {
  71         public:
  72                 ///
  73                 ColInfo();
  74                 /// currently possible: 'l', 'c', 'r'
  75                 char align_;
  76                 /// cache for drawing
  77                 int h_offset;
  78                 /// cached width
  79                 mutable int width_;
  80                 /// cached offset
  81                 mutable int offset_;
  82                 /// how many lines to the left of this column?
  83                 unsigned int lines_;
  84                 /// additional amount to be skipped when drawing
  85                 int skip_;
  86                 /// Special alignment.
  87                 /// This does also contain align_ and lines_ if it is nonempty.
  88                 /// It needs to be in sync with align_ and lines_ because some
  89                 /// code only uses align_ and lines_.
  90                 docstring special_;
  91         };
  92
  93 public:
  94         /// sets nrows and ncols to 1, vertical alingment to 'c'
  95         InsetMathGrid(Buffer * buf);
  96         /// Note: columns first!
  97         InsetMathGrid(Buffer * buf, col_type m, row_type n);
  98         ///
  99         InsetMathGrid(Buffer * buf, col_type m, row_type n, char valign,
 100                 docstring const & halign);
 101         ///
 102         void metrics(MetricsInfo & mi, Dimension &) const;
 103         ///
 104         void draw(PainterInfo & pi, int x, int y) const;
 105         ///
 106         void drawWithMargin(PainterInfo & pi, int x, int y,
 107                 int lmargin = 0, int rmargin = 0) const;
 108         /// draw decorations.
 109         void drawDecoration(PainterInfo & pi, int x, int y) const
 110         { drawMarkers2(pi, x, y); }
 111         ///
 112         void metricsT(TextMetricsInfo const & mi, Dimension & dim) const;
 113         ///
 114         void drawT(TextPainter & pi, int x, int y) const;
 115         /// extract number of columns from alignment string
 116         static col_type guessColumns(docstring const & halign);
 117         /// accepts some LaTeX column codes: p,m,!,@,M,<,>
 118         void setHorizontalAlignments(docstring const & align);
 119         ///
 120         void setHorizontalAlignment(char c, col_type col);
 121         ///
 122         char horizontalAlignment(col_type col) const;
 123         ///
 124         docstring horizontalAlignments() const;
 125         /// 't', 'b', or 'm'
 126         void setVerticalAlignment(char c);
 127         ///
 128         char verticalAlignment() const;
 129         ///
 130         void vcrskip(Length const &, row_type row);
 131         ///
 132         Length vcrskip(row_type row) const;
 133         ///
 134         void resize(short int type, col_type cols);
 135         ///
 136         const RowInfo & rowinfo(row_type row) const;
 137         /// returns topmost row if passed (-1)
 138         RowInfo & rowinfo(row_type row);
 139         ///
 140         const CellInfo & cellinfo(idx_type idx) const { return cellinfo_[idx]; }
 141         ///
 142         CellInfo & cellinfo(idx_type idx) { return cellinfo_[idx]; }
 143         /// identifies GridInset
 144         InsetMathGrid * asGridInset() { return this; }
 145         /// identifies GridInset
 146         InsetMathGrid const * asGridInset() const { return this; }
 147         ///
 148         col_type ncols() const;
 149         ///
 150         row_type nrows() const;
 151         ///
 152         col_type col(idx_type idx) const;
 153         ///
 154         row_type row(idx_type idx) const;
 155
 156         ///
 157         bool idxUpDown(Cursor &, bool up) const;
 158         ///
 159         bool idxBackward(Cursor &) const;
 160         ///
 161         bool idxForward(Cursor &) const;
 162         ///
 163         bool idxFirst(Cursor &) const;
 164         ///
 165         bool idxLast(Cursor &) const;
 166         ///
 167         bool idxDelete(idx_type & idx);
 168         /// pulls cell after pressing erase
 169         void idxGlue(idx_type idx);
 170
 171         /// add a row, one row down
 172         virtual void addRow(row_type r);
 173         /// delete a row
 174         virtual void delRow(row_type r);
 175         /// copy a row
 176         virtual void copyRow(row_type r);
 177         /// swap two rows
 178         virtual void swapRow(row_type r);
 179         /// add a column, here
 180         virtual void addCol(col_type c);
 181         /// delete a column
 182         virtual void delCol(col_type c);
 183         /// copy a column
 184         virtual void copyCol(col_type c);
 185         /// swap two columns
 186         virtual void swapCol(col_type c);
 187         ///
 188         virtual void appendRow();
 189         ///
 190         idx_type index(row_type r, col_type c) const;
 191         ///
 192         bool idxBetween(idx_type idx, idx_type from, idx_type to) const;
 193         ///
 194         virtual int defaultColSpace(col_type) { return 0; }
 195         ///
 196         virtual char defaultColAlign(col_type) { return 'c'; }
 197         ///
 198         void setDefaults();
 199
 200         ///
 201         virtual int colsep() const;
 202         ///
 203         virtual int rowsep() const;
 204         ///
 205         virtual int hlinesep() const;
 206         ///
 207         virtual int vlinesep() const;
 208         ///
 209         virtual int border() const;
 210
 211         ///
 212         void write(WriteStream & os) const;
 213         ///
 214         void write(WriteStream & os,
 215                    row_type beg_row, col_type beg_col,
 216                    row_type end_row, col_type end_col) const;
 217         ///
 218         void normalize(NormalStream &) const;
 219         ///
 220         //void maple(MapleStream &) const;
 221         ///
 222         void mathmlize(MathStream &) const;
 223         ///
 224         //void octave(OctaveStream &) const;
 225
 226 protected:
 227         ///
 228         void doDispatch(Cursor & cur, FuncRequest & cmd);
 229         ///
 230         bool getStatus(Cursor & cur, FuncRequest const & cmd,
 231                 FuncStatus & flag) const;
 232         /// returns x offset of cell compared to inset
 233         int cellXOffset(BufferView const &, idx_type idx) const;
 234         /// returns y offset of cell compared to inset
 235         int cellYOffset(idx_type idx) const;
 236         /// returns proper 'end of line' code for LaTeX
 237         virtual docstring eolString(row_type row, bool fragile) const;
 238         /// returns proper 'end of column' code for LaTeX
 239         virtual docstring eocString(col_type col, col_type lastcol) const;
 240         /// splits cells and shifts right part to the next cell
 241         void splitCell(Cursor & cur);
 242
 243         /// row info.
 244         /// rowinfo_[nrows()] is a dummy row used only for hlines.
 245         std::vector<RowInfo> rowinfo_;
 246         /// column info.
 247         /// colinfo_[ncols()] is a dummy column used only for vlines.
 248         std::vector<ColInfo> colinfo_;
 249         /// cell info
 250         std::vector<CellInfo> cellinfo_;
 251         ///
 252         InsetCode lyxCode() const { return MATH_GRID_CODE; }
 253
 254 private:
 255         ///
 256         char v_align_; // add approp. type
 257         ///
 258         Inset * clone() const;
 259 };
 260
 261
 262 } // namespace lyx
 263
 264 #endif