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 #ifdef __GNUG__
  17 #pragma implementation
  18 #endif
  19
  20 #include <config.h>
  21 #include <fstream>
  22
  23 #include "formula.h"
  24 #include "commandtags.h"
  25 #include "math_cursor.h"
  26 #include "math_parser.h"
  27 #include "math_charinset.h"
  28 #include "lyx_main.h"
  29 #include "BufferView.h"
  30 #include "gettext.h"
  31 #include "debug.h"
  32 #include "lyx_gui_misc.h"
  33 #include "support/LOstream.h"
  34 #include "support/LAssert.h"
  35 #include "support/lyxlib.h"
  36 #include "support/syscall.h"
  37 #include "support/lstrings.h"
  38 #include "LyXView.h"
  39 #include "Painter.h"
  40 #include "lyxrc.h"
  41 #include "math_matrixinset.h"
  42 #include "mathed/support.h"
  43
  44 using std::ostream;
  45 using std::ifstream;
  46 using std::istream;
  47 using std::pair;
  48 using std::endl;
  49 using std::vector;
  50
  51
  52
  53 InsetFormula::InsetFormula()
  54         : par_(MathAtom(new MathMatrixInset))
  55 {}
  56
  57
  58 InsetFormula::InsetFormula(MathInsetTypes t)
  59         : par_(MathAtom(new MathMatrixInset(t)))
  60 {}
  61
  62
  63 InsetFormula::InsetFormula(string const & s)
  64 {
  65         if (s.size()) {
  66                 bool res = mathed_parse_normal(par_, s);
  67
  68                 if (!res)
  69                         res = mathed_parse_normal(par_, "$" + s + "$");
  70
  71                 if (!res) {
  72                         lyxerr << "cannot interpret '" << s << "' as math\n";
  73                         par_ = MathAtom(new MathMatrixInset(LM_OT_SIMPLE));
  74                 }
  75         }
  76         metrics();
  77 }
  78
  79
  80 Inset * InsetFormula::clone(Buffer const &, bool) const
  81 {
  82         return new InsetFormula(*this);
  83 }
  84
  85
  86 void InsetFormula::write(Buffer const * buf, ostream & os) const
  87 {
  88         os << "Formula ";
  89         latex(buf, os, false, false);
  90 }
  91
  92
  93 int InsetFormula::latex(Buffer const *, ostream & os, bool fragile, bool) const
  94 {
  95         par_->write(os, fragile);
  96         return 1;
  97 }
  98
  99
 100 int InsetFormula::ascii(Buffer const *, ostream & os, int) const
 101 {
 102         par_->write(os, false);
 103         return 1;
 104 }
 105
 106
 107 int InsetFormula::linuxdoc(Buffer const * buf, ostream & os) const
 108 {
 109         return ascii(buf, os, 0);
 110 }
 111
 112
 113 int InsetFormula::docbook(Buffer const * buf, ostream & os) const
 114 {
 115         return ascii(buf, os, 0);
 116 }
 117
 118
 119 void InsetFormula::read(Buffer const *, LyXLex & lex)
 120 {
 121         mathed_parse_normal(par_, lex);
 122         metrics();
 123 }
 124
 125
 126 void InsetFormula::draw(BufferView * bv, LyXFont const &,
 127                         int y, float & xx, bool) const
 128 {
 129         int x = int(xx) - 1;
 130         y -= 2;
 131
 132         MathInset::workwidth = bv->workWidth();
 133         Painter & pain = bv->painter();
 134
 135         metrics();
 136         int w = par_->width();
 137         int h = par_->height();
 138         int a = par_->ascent();
 139         pain.fillRectangle(x, y - a, w, h, LColor::mathbg);
 140
 141         if (mathcursor && mathcursor->formula() == this) {
 142                 mathcursor->drawSelection(pain);
 143                 pain.rectangle(x, y - a, w, h, LColor::mathframe);
 144         }
 145
 146         par_->draw(pain, x, y);
 147         xx += par_->width();
 148
 149         setCursorVisible(false);
 150 }
 151
 152
 153 void InsetFormula::metrics() const
 154 {
 155         par_->metrics(display() ? LM_ST_DISPLAY : LM_ST_TEXT);
 156 }
 157
 158
 159 vector<string> const InsetFormula::getLabelList() const
 160 {
 161         return mat()->getLabelList();
 162 }
 163
 164
 165 UpdatableInset::RESULT
 166 InsetFormula::localDispatch(BufferView * bv, kb_action action,
 167          string const & arg)
 168 {
 169         RESULT result = DISPATCHED;
 170
 171         switch (action) {
 172
 173                 case LFUN_BREAKLINE:
 174                         bv->lockedInsetStoreUndo(Undo::INSERT);
 175                         mathcursor->breakLine();
 176                         mathcursor->normalize();
 177                         updateLocal(bv, true);
 178                         break;
 179
 180                 case LFUN_MATH_NUMBER:
 181                 {
 182                         //lyxerr << "toggling all numbers\n";
 183                         if (display()) {
 184                                 bv->lockedInsetStoreUndo(Undo::INSERT);
 185                                 bool old = mat()->numberedType();
 186                                 for (MathInset::row_type row = 0; row < par_->nrows(); ++row)
 187                                         mat()->numbered(row, !old);
 188                                 bv->owner()->message(old ? _("No number") : _("Number"));
 189                                 updateLocal(bv, true);
 190                         }
 191                         break;
 192                 }
 193
 194                 case LFUN_MATH_NONUMBER:
 195                 {
 196                         //lyxerr << "toggling line number\n";
 197                         if (display()) {
 198                                 bv->lockedInsetStoreUndo(Undo::INSERT);
 199                                 MathCursor::row_type row = mathcursor->row();
 200                                 bool old = mat()->numbered(row);
 201                                 bv->owner()->message(old ? _("No number") : _("Number"));
 202                                 mat()->numbered(row, !old);
 203                                 updateLocal(bv, true);
 204                         }
 205                         break;
 206                 }
 207
 208                 case LFUN_INSERT_LABEL:
 209                 {
 210                         bv->lockedInsetStoreUndo(Undo::INSERT);
 211
 212                         MathCursor::row_type row = mathcursor->row();
 213                         string old_label = mat()->label(row);
 214                         string new_label = arg;
 215
 216                         if (new_label.empty()) {
 217                                 string const default_label =
 218                                         (lyxrc.label_init_length >= 0) ? "eq:" : "";
 219                                 pair<bool, string> const res = old_label.empty()
 220                                         ? askForText(_("Enter new label to insert:"), default_label)
 221                                         : askForText(_("Enter label:"), old_label);
 222
 223                                 lyxerr << "res: " << res.first << " - '" << res.second << "'\n";
 224                                 if (!res.first)
 225                                         break;
 226                                 new_label = frontStrip(strip(res.second));
 227                         }
 228
 229                         //if (new_label == old_label)
 230                         //      break;  // Nothing to do
 231
 232                         if (!new_label.empty()) {
 233                                 lyxerr << "setting label to '" << new_label << "'\n";
 234                                 mat()->numbered(row, true);
 235                         }
 236
 237                         if (!new_label.empty() && bv->ChangeRefsIfUnique(old_label, new_label))
 238                                 bv->redraw();
 239
 240                         mat()->label(row, new_label);
 241
 242                         updateLocal(bv, true);
 243                         break;
 244                 }
 245
 246                 case LFUN_MATH_EXTERN:
 247                         bv->lockedInsetStoreUndo(Undo::EDIT);
 248                         handleExtern(arg, bv);
 249                         updateLocal(bv, true);
 250                         break;
 251
 252                 case LFUN_MATH_MUTATE:
 253                 {
 254                         bv->lockedInsetStoreUndo(Undo::EDIT);
 255                         int x;
 256                         int y;
 257                         mathcursor->getPos(x, y);
 258                         mat()->mutate(arg);
 259                         mathcursor->setPos(x, y);
 260                         mathcursor->normalize();
 261                         updateLocal(bv, true);
 262                         break;
 263                 }
 264
 265                 case LFUN_MATH_DISPLAY:
 266                 {
 267                         int x;
 268                         int y;
 269                         mathcursor->getPos(x, y);
 270                         if (mat()->getType() == LM_OT_SIMPLE)
 271                                 mat()->mutate(LM_OT_EQUATION);
 272                         else
 273                                 mat()->mutate(LM_OT_SIMPLE);
 274                         mathcursor->setPos(x, y);
 275                         mathcursor->normalize();
 276                         updateLocal(bv, true);
 277                         break;
 278                 }
 279
 280                 case LFUN_PASTESELECTION:
 281                 {
 282                         string const clip = bv->getClipboard();
 283                 if (!clip.empty())
 284                                 mathed_parse_normal(par_, clip);
 285                         break;
 286                 }
 287
 288                 case LFUN_MATH_COLUMN_INSERT:
 289                 {
 290                         if (mat()->getType() == LM_OT_ALIGN)
 291                                 mat()->mutate(LM_OT_ALIGNAT);
 292                         mat()->addCol(mat()->ncols());
 293                         mathcursor->normalize();
 294                         updateLocal(bv, true);
 295                 }
 296
 297                 default:
 298                         result = InsetFormulaBase::localDispatch(bv, action, arg);
 299         }
 300
 301         return result;
 302 }
 303
 304
 305 void InsetFormula::handleExtern(const string & arg, BufferView *)
 306 {
 307         // where are we?
 308         MathArray & ar = mathcursor->cursor().cell();
 309
 310         // find position of last '=' in the array for handleExtern
 311         MathArray::size_type pos = ar.size();
 312         for (MathArray::const_iterator it = ar.begin(); it != ar.end(); ++it)
 313                 if ((*it)->getChar() == '=')
 314                         pos = it - ar.begin();
 315
 316         // delete everything behind this position
 317         ar.erase(pos, ar.size());
 318
 319         // create normalized expression
 320         //string outfile = lyx::tempName("maple.out");
 321         string outfile = "/tmp/lyx2" + arg + ".out";
 322         ostringstream os;
 323         ar.writeNormal(os);
 324         string code = os.str().c_str();
 325
 326         // run external sript
 327         string script = "lyx2" + arg + " '" + code + "' " + outfile;
 328         lyxerr << "calling: " << script << endl;
 329         Systemcalls cmd(Systemcalls::System, script, 0);
 330
 331         // append a '='
 332         ar.push_back(MathAtom(new MathCharInset('=')));
 333
 334         // append result
 335         ifstream is(outfile.c_str());
 336         mathed_parse_cell(ar, is);
 337         mathcursor->end();
 338
 339         // re-compute inset dimension
 340         metrics();
 341 }
 342
 343
 344 bool InsetFormula::display() const
 345 {
 346         return mat()->getType() != LM_OT_SIMPLE;
 347 }
 348
 349
 350 MathMatrixInset const * InsetFormula::mat() const
 351 {
 352         lyx::Assert(par_->asMatrixInset());
 353         return par_->asMatrixInset();
 354 }
 355
 356
 357 MathMatrixInset * InsetFormula::mat()
 358 {
 359         lyx::Assert(par_->asMatrixInset());
 360         return par_->asMatrixInset();
 361 }
 362
 363
 364 Inset::Code InsetFormula::lyxCode() const
 365 {
 366         return Inset::MATH_CODE;
 367 }
 368
 369
 370 void InsetFormula::validate(LaTeXFeatures & features) const
 371 {
 372         par_->validate(features);
 373 }
 374
 375
 376 bool InsetFormula::insetAllowed(Inset::Code code) const
 377 {
 378         return code == Inset::LABEL_CODE && display();
 379 }
 380
 381
 382 int InsetFormula::ascent(BufferView *, LyXFont const &) const
 383 {
 384         return par_->ascent() + 2;
 385 }
 386
 387
 388 int InsetFormula::descent(BufferView *, LyXFont const &) const
 389 {
 390         return par_->descent() - 2;
 391 }
 392
 393
 394 int InsetFormula::width(BufferView *, LyXFont const &) const
 395 {
 396         metrics();
 397         return par_->width();
 398 }
 399
 400
 401 MathInsetTypes InsetFormula::getType() const
 402 {
 403         return mat()->getType();
 404 }