src/mathed/formula.C

   1 /*
   2 *  File:        formula.C
   3 *  Purpose:     Implementation of formula inset
   4 *  Author:      Alejandro Aguilar Sierra <asierra@servidor.unam.mx>
   5 *  Created:     January 1996
   6 *  Description: Allows the edition of math paragraphs inside Lyx.
   7 *
   8 *  Copyright: 1996-1998 Alejandro Aguilar Sierra
   9 *
  10 *  Version: 0.4, Lyx project.
  11 *
  12 *   You are free to use and modify this code under the terms of
  13 *   the GNU General Public Licence version 2 or later.
  14 */
  15
  16 #include <config.h>
  17 #include <fstream>
  18
  19 #include "support/LOstream.h"
  20
  21 #ifdef __GNUG__
  22 #pragma implementation
  23 #endif
  24
  25 #include "formula.h"
  26 #include "commandtags.h"
  27 #include "math_cursor.h"
  28 #include "math_parser.h"
  29 #include "lyx_main.h"
  30 #include "BufferView.h"
  31 #include "lyxtext.h"
  32 #include "gettext.h"
  33 #include "debug.h"
  34 #include "lyx_gui_misc.h"
  35 #include "support/LOstream.h"
  36 #include "support/lyxlib.h"
  37 #include "support/syscall.h"
  38 #include "LyXView.h"
  39 #include "Painter.h"
  40 #include "font.h"
  41 #include "lyxrc.h"
  42 #include "math_matrixinset.h"
  43 #include "mathed/support.h"
  44
  45 using std::ostringstream;
  46 using std::ostream;
  47 using std::ifstream;
  48 using std::istream;
  49 using std::pair;
  50 using std::endl;
  51 using std::vector;
  52
  53 extern char const * latex_mathenv[];
  54 extern MathCursor * mathcursor;
  55 extern LyXFont WhichFont(short type, int size);
  56
  57
  58
  59 // quite a hack i know. Should be done with return values...
  60 int number_of_newlines = 0;
  61
  62
  63 InsetFormula::InsetFormula()
  64         : InsetFormulaBase(new MathMatrixInset)
  65 {}
  66
  67
  68 InsetFormula::InsetFormula(MathInsetTypes t)
  69         : InsetFormulaBase(new MathMatrixInset(t))
  70 {}
  71
  72
  73
  74 Inset * InsetFormula::Clone(Buffer const &) const
  75 {
  76         return new InsetFormula(*this);
  77 }
  78
  79
  80 void InsetFormula::Write(Buffer const * buf, ostream & os) const
  81 {
  82         os << "Formula ";
  83         Latex(buf, os, false, false);
  84 }
  85
  86
  87 int InsetFormula::Latex(Buffer const *, ostream & os, bool fragile, bool) const
  88 {
  89         par()->Write(os, fragile);
  90         return 1;
  91 }
  92
  93
  94 int InsetFormula::Ascii(Buffer const *, ostream & os, int) const
  95 {
  96         par()->Write(os, false);
  97         return 1;
  98 }
  99
 100
 101 int InsetFormula::Linuxdoc(Buffer const * buf, ostream & os) const
 102 {
 103         return Ascii(buf, os, 0);
 104 }
 105
 106
 107 int InsetFormula::DocBook(Buffer const * buf, ostream & os) const
 108 {
 109         return Ascii(buf, os, 0);
 110 }
 111
 112
 113 void InsetFormula::Read(Buffer const *, LyXLex & lex)
 114 {
 115         par_ = mathed_parse(lex);
 116 }
 117
 118
 119 void InsetFormula::draw(BufferView * bv, LyXFont const &,
 120                         int y, float & x, bool) const
 121 {
 122         MathInset::workwidth = bv->workWidth();
 123         Painter & pain = bv->painter();
 124
 125         if (mathcursor) {
 126                 par()->Metrics(LM_ST_TEXT);
 127                 int w = par()->width()  + 2;
 128                 int a = par()->ascent() + 1;
 129                 int h = par()->height() + 1;
 130
 131                 if (mathcursor->formula() == this) {
 132                         if (mathcursor->Selection()) {
 133                                 int xp[10];
 134                                 int yp[10];
 135                                 int n;
 136                                 mathcursor->SelGetArea(xp, yp, n);
 137                                 pain.fillPolygon(xp, yp, n, LColor::selection);
 138                         }
 139                         pain.rectangle(int(x - 1), y - a, w, h, LColor::green);
 140                 }
 141         }
 142
 143         par()->draw(pain, int(x), y);
 144         x += par()->width();
 145
 146         setCursorVisible(false);
 147 }
 148
 149
 150 vector<string> const InsetFormula::getLabelList() const
 151 {
 152         return par()->getLabelList();
 153 }
 154
 155
 156 UpdatableInset::RESULT
 157 InsetFormula::LocalDispatch(BufferView * bv, kb_action action,
 158          string const & arg)
 159 {
 160         RESULT result = DISPATCHED;
 161
 162         switch (action) {
 163
 164                 case LFUN_BREAKLINE:
 165                         bv->lockedInsetStoreUndo(Undo::INSERT);
 166                         par()->breakLine();
 167                         UpdateLocal(bv);
 168                         break;
 169
 170
 171                 case LFUN_DELETE_LINE_FORWARD:
 172                         bv->lockedInsetStoreUndo(Undo::DELETE);
 173                         mathcursor->DelLine();
 174                         UpdateLocal(bv);
 175                         break;
 176
 177                 case LFUN_MATH_NUMBER:
 178                 {
 179                         //lyxerr << "toggling all numbers\n";
 180                         if (display()) {
 181                                 bv->lockedInsetStoreUndo(Undo::INSERT);
 182                                 bool old = par()->numberedType();
 183                                 for (int row = 0; row < par()->nrows(); ++row)
 184                                         par()->numbered(row, !old);
 185                                 bv->owner()->message(old ? _("No number") : _("Number"));
 186                                 UpdateLocal(bv);
 187                         }
 188                         break;
 189                 }
 190
 191                 case LFUN_MATH_NONUMBER:
 192                 {
 193                         //lyxerr << "toggling line number\n";
 194                         if (display()) {
 195                                 bv->lockedInsetStoreUndo(Undo::INSERT);
 196                                 int row = par()->nrows() - 1;
 197                                 bool old = par()->numbered(row);
 198                                 bv->owner()->message(old ? _("No number") : _("Number"));
 199                                 par()->numbered(row, !old);
 200                                 UpdateLocal(bv);
 201                         }
 202                         break;
 203                 }
 204
 205                 case LFUN_INSERT_LABEL:
 206                 {
 207                         bv->lockedInsetStoreUndo(Undo::INSERT);
 208
 209                         int row = par()->nrows() - 1;
 210                         string old_label = par()->label(row);
 211                         string new_label = arg;
 212
 213                         if (new_label.empty()) {
 214                                 string const default_label =
 215                                         (lyxrc.label_init_length >= 0) ? "eq:" : "";
 216                                 pair<bool, string> const res = old_label.empty()
 217                                         ? askForText(_("Enter new label to insert:"), default_label)
 218                                         : askForText(_("Enter label:"), old_label);
 219
 220                                 lyxerr << "res: " << res.first << " - '" << res.second << "'\n";
 221                                 if (!res.first)
 222                                         break;
 223                                 new_label = frontStrip(strip(res.second));
 224                         }
 225
 226                         //if (new_label == old_label)
 227                         //      break;  // Nothing to do
 228
 229                         if (!new_label.empty()) {
 230                                 lyxerr << "setting label to '" << new_label << "'\n";
 231                                 par()->numbered(row, true);
 232                         }
 233
 234                         if (!new_label.empty() && bv->ChangeRefsIfUnique(old_label, new_label))
 235                                 bv->redraw();
 236
 237                         par()->label(row, new_label);
 238
 239                         UpdateLocal(bv);
 240                         break;
 241                 }
 242
 243                 case LFUN_MATH_EXTERN:
 244                         HandleExtern(arg, bv);
 245                         UpdateLocal(bv);
 246                         break;
 247
 248                 case LFUN_MATH_MUTATE:
 249                         par()->mutate(arg);
 250                         UpdateLocal(bv);
 251                         break;
 252
 253                 case LFUN_TABINSERT:
 254                         lyxerr << "take index from cursor\n";
 255                         par()->splitCell(0);
 256                         UpdateLocal(bv);
 257                         break;
 258
 259                 case LFUN_MATH_DISPLAY:
 260                         if (par()->GetType() == LM_OT_SIMPLE)
 261                                 par()->mutate(LM_OT_EQUATION);
 262                         else
 263                                 par()->mutate(LM_OT_SIMPLE);
 264                         UpdateLocal(bv);
 265                         break;
 266
 267                 default:
 268                         result = InsetFormulaBase::LocalDispatch(bv, action, arg);
 269         }
 270
 271         return result;
 272 }
 273
 274
 275 void InsetFormula::HandleExtern(const string & arg, BufferView *)
 276 {
 277         //string outfile = lyx::tempName("maple.out");
 278         string outfile = "/tmp/lyx2" + arg + ".out";
 279         ostringstream os;
 280         par()->WriteNormal(os);
 281         string code = os.str().c_str();
 282         string script = "lyx2" + arg + " '" + code + "' " + outfile;
 283         lyxerr << "calling: " << script << endl;
 284         Systemcalls cmd(Systemcalls::System, script, 0);
 285
 286         ifstream is(outfile.c_str());
 287         par_ = mathed_parse(is);
 288 }
 289
 290 bool InsetFormula::display() const
 291 {
 292         return par_->GetType() != LM_OT_SIMPLE;
 293 }
 294
 295
 296 MathMatrixInset * InsetFormula::par() const
 297 {
 298         return static_cast<MathMatrixInset *>(par_);
 299 }
 300
 301
 302 Inset::Code InsetFormula::LyxCode() const
 303 {
 304         return Inset::MATH_CODE;
 305 }
 306
 307
 308 void InsetFormula::Validate(LaTeXFeatures & features) const
 309 {
 310         par()->Validate(features);
 311 }
 312
 313
 314 int InsetFormula::ascent(BufferView *, LyXFont const &) const
 315 {
 316         return par()->ascent();
 317 }
 318
 319
 320 int InsetFormula::descent(BufferView *, LyXFont const &) const
 321 {
 322         return par()->descent();
 323 }
 324
 325
 326 int InsetFormula::width(BufferView *, LyXFont const &) const
 327 {
 328         par()->Metrics(LM_ST_TEXT);
 329         return par()->width();
 330 }
 331
 332 /*
 333 LyXFont const InsetFormula::ConvertFont(LyXFont const & f) const
 334 {
 335         // We have already discussed what was here
 336         LyXFont font(f);
 337         font.setLatex(LyXFont::OFF);
 338         return font;
 339 }
 340 */