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
  22 #include "formula.h"
  23 #include "commandtags.h"
  24 #include "math_cursor.h"
  25 #include "math_parser.h"
  26 #include "math_charinset.h"
  27 #include "lyx_main.h"
  28 #include "BufferView.h"
  29 #include "gettext.h"
  30 #include "debug.h"
  31 #include "lyx_gui_misc.h"
  32 #include "support/LOstream.h"
  33 #include "support/LAssert.h"
  34 #include "support/lyxlib.h"
  35 #include "support/syscall.h"
  36 #include "support/lstrings.h"
  37 #include "support/filetools.h" // LibFileSearch
  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 namespace {
  53
  54         void stripFromLastEqualSign(MathArray & ar)
  55         {
  56                 // find position of last '=' in the array
  57                 MathArray::size_type pos = ar.size();
  58                 for (MathArray::const_iterator it = ar.begin(); it != ar.end(); ++it)
  59                         if ((*it)->getChar() == '=')
  60                                 pos = it - ar.begin();
  61
  62                 // delete everything behind this position
  63                 ar.erase(pos, ar.size());
  64         }
  65
  66
  67         MathArray pipeThroughExtern(string const & arg, MathArray const & ar)
  68         {
  69                 string lang;
  70                 string extra;
  71                 istringstream iss(arg.c_str());
  72                 iss >> lang >> extra;
  73                 if (extra.empty())
  74                         extra = "noextra";
  75
  76                 // create normalized expression
  77                 string outfile = lyx::tempName(string(), "mathextern");
  78                 ostringstream os;
  79                 os << "[" << extra << ' ';
  80                 ar.writeNormal(os);
  81                 os << "]";
  82                 string code = os.str().c_str();
  83
  84                 // run external sript
  85                 string file = LibFileSearch(string(), "lyx2" + lang);
  86                 if (file.empty()) {
  87                         lyxerr << "converter to '" << lang << "' not found\n";
  88                         return MathArray();
  89                 }
  90                 string script = file + " '" + code + "' " + outfile;
  91                 lyxerr << "calling: " << script << endl;
  92                 Systemcalls cmd(Systemcalls::System, script, 0);
  93
  94                 // append result
  95                 MathArray res;
  96                 mathed_parse_cell(res, GetFileContents(outfile));
  97                 return res;
  98         }
  99
 100 }
 101
 102
 103 InsetFormula::InsetFormula()
 104         : par_(MathAtom(new MathMatrixInset))
 105 {}
 106
 107
 108 InsetFormula::InsetFormula(MathInsetTypes t)
 109         : par_(MathAtom(new MathMatrixInset(t)))
 110 {}
 111
 112
 113 InsetFormula::InsetFormula(string const & s)
 114 {
 115         if (s.size()) {
 116                 bool res = mathed_parse_normal(par_, s);
 117
 118                 if (!res)
 119                         res = mathed_parse_normal(par_, "$" + s + "$");
 120
 121                 if (!res) {
 122                         lyxerr << "cannot interpret '" << s << "' as math\n";
 123                         par_ = MathAtom(new MathMatrixInset(LM_OT_SIMPLE));
 124                 }
 125         }
 126         metrics();
 127 }
 128
 129
 130 Inset * InsetFormula::clone(Buffer const &, bool) const
 131 {
 132         return new InsetFormula(*this);
 133 }
 134
 135
 136 void InsetFormula::write(Buffer const * buf, ostream & os) const
 137 {
 138         os << "Formula ";
 139         latex(buf, os, false, false);
 140 }
 141
 142
 143 int InsetFormula::latex(Buffer const * buf, ostream & os, bool fragil, bool)
 144         const
 145 {
 146         MathWriteInfo wi(buf, os, fragil);
 147         par_->write(wi);
 148         return 1;
 149 }
 150
 151
 152 int InsetFormula::ascii(Buffer const * buf, ostream & os, int) const
 153 {
 154         MathWriteInfo wi(buf, os, false);
 155         par_->write(wi);
 156         return 1;
 157 }
 158
 159
 160 int InsetFormula::linuxdoc(Buffer const * buf, ostream & os) const
 161 {
 162         return ascii(buf, os, 0);
 163 }
 164
 165
 166 int InsetFormula::docbook(Buffer const * buf, ostream & os) const
 167 {
 168         return ascii(buf, os, 0);
 169 }
 170
 171
 172 void InsetFormula::read(Buffer const *, LyXLex & lex)
 173 {
 174         mathed_parse_normal(par_, lex);
 175         metrics();
 176 }
 177
 178
 179 void InsetFormula::draw(BufferView * bv, LyXFont const & font,
 180                         int y, float & xx, bool) const
 181 {
 182         int x = int(xx) - 1;
 183         y -= 2;
 184
 185         Painter & pain = bv->painter();
 186
 187         metrics(bv, font);
 188         int w = par_->width();
 189         int h = par_->height();
 190         int a = par_->ascent();
 191         pain.fillRectangle(x, y - a, w, h, LColor::mathbg);
 192
 193         if (mathcursor && mathcursor->formula() == this) {
 194                 mathcursor->drawSelection(pain);
 195                 pain.rectangle(x, y - a, w, h, LColor::mathframe);
 196         }
 197
 198         par_->draw(pain, x, y);
 199         xx += par_->width();
 200         xo_ = x;
 201         yo_ = y;
 202
 203         setCursorVisible(false);
 204 }
 205
 206
 207 vector<string> const InsetFormula::getLabelList() const
 208 {
 209         return mat()->getLabelList();
 210 }
 211
 212
 213 UpdatableInset::RESULT
 214 InsetFormula::localDispatch(BufferView * bv, kb_action action,
 215          string const & arg)
 216 {
 217         RESULT result = DISPATCHED;
 218
 219         switch (action) {
 220
 221                 case LFUN_BREAKLINE:
 222                         bv->lockedInsetStoreUndo(Undo::INSERT);
 223                         mathcursor->breakLine();
 224                         mathcursor->normalize();
 225                         updateLocal(bv, true);
 226                         break;
 227
 228                 case LFUN_MATH_NUMBER:
 229                 {
 230                         //lyxerr << "toggling all numbers\n";
 231                         if (display()) {
 232                                 bv->lockedInsetStoreUndo(Undo::INSERT);
 233                                 bool old = mat()->numberedType();
 234                                 for (MathInset::row_type row = 0; row < par_->nrows(); ++row)
 235                                         mat()->numbered(row, !old);
 236                                 bv->owner()->message(old ? _("No number") : _("Number"));
 237                                 updateLocal(bv, true);
 238                         }
 239                         break;
 240                 }
 241
 242                 case LFUN_MATH_NONUMBER:
 243                 {
 244                         //lyxerr << "toggling line number\n";
 245                         if (display()) {
 246                                 bv->lockedInsetStoreUndo(Undo::INSERT);
 247                                 MathCursor::row_type row = mathcursor->row();
 248                                 bool old = mat()->numbered(row);
 249                                 bv->owner()->message(old ? _("No number") : _("Number"));
 250                                 mat()->numbered(row, !old);
 251                                 updateLocal(bv, true);
 252                         }
 253                         break;
 254                 }
 255
 256                 case LFUN_INSERT_LABEL:
 257                 {
 258                         bv->lockedInsetStoreUndo(Undo::INSERT);
 259
 260                         MathCursor::row_type row = mathcursor->row();
 261                         string old_label = mat()->label(row);
 262                         string new_label = arg;
 263
 264                         if (new_label.empty()) {
 265                                 string const default_label =
 266                                         (lyxrc.label_init_length >= 0) ? "eq:" : "";
 267                                 pair<bool, string> const res = old_label.empty()
 268                                         ? askForText(_("Enter new label to insert:"), default_label)
 269                                         : askForText(_("Enter label:"), old_label);
 270
 271                                 lyxerr << "res: " << res.first << " - '" << res.second << "'\n";
 272                                 if (!res.first)
 273                                         break;
 274                                 new_label = frontStrip(strip(res.second));
 275                         }
 276
 277                         //if (new_label == old_label)
 278                         //      break;  // Nothing to do
 279
 280                         if (!new_label.empty()) {
 281                                 lyxerr << "setting label to '" << new_label << "'\n";
 282                                 mat()->numbered(row, true);
 283                         }
 284
 285                         if (!new_label.empty() && bv->ChangeRefsIfUnique(old_label, new_label))
 286                                 bv->redraw();
 287
 288                         mat()->label(row, new_label);
 289
 290                         updateLocal(bv, true);
 291                         break;
 292                 }
 293
 294                 case LFUN_MATH_EXTERN:
 295                         bv->lockedInsetStoreUndo(Undo::EDIT);
 296                         handleExtern(arg);
 297                         // re-compute inset dimension
 298                         metrics(bv);
 299                         updateLocal(bv, true);
 300                         break;
 301
 302                 case LFUN_MATH_MUTATE:
 303                 {
 304                         bv->lockedInsetStoreUndo(Undo::EDIT);
 305                         int x;
 306                         int y;
 307                         mathcursor->getPos(x, y);
 308                         mat()->mutate(arg);
 309                         mathcursor->setPos(x, y);
 310                         mathcursor->normalize();
 311                         updateLocal(bv, true);
 312                         break;
 313                 }
 314
 315                 case LFUN_MATH_DISPLAY:
 316                 {
 317                         int x;
 318                         int y;
 319                         mathcursor->getPos(x, y);
 320                         if (mat()->getType() == LM_OT_SIMPLE)
 321                                 mat()->mutate(LM_OT_EQUATION);
 322                         else
 323                                 mat()->mutate(LM_OT_SIMPLE);
 324                         mathcursor->setPos(x, y);
 325                         mathcursor->normalize();
 326                         updateLocal(bv, true);
 327                         break;
 328                 }
 329
 330                 case LFUN_PASTESELECTION:
 331                 {
 332                         string const clip = bv->getClipboard();
 333                 if (!clip.empty())
 334                                 mathed_parse_normal(par_, clip);
 335                         break;
 336                 }
 337
 338                 case LFUN_MATH_COLUMN_INSERT:
 339                 {
 340                         if (mat()->getType() == LM_OT_ALIGN)
 341                                 mat()->mutate(LM_OT_ALIGNAT);
 342                         mat()->addCol(mat()->ncols());
 343                         mathcursor->normalize();
 344                         updateLocal(bv, true);
 345                 }
 346
 347                 default:
 348                         result = InsetFormulaBase::localDispatch(bv, action, arg);
 349         }
 350
 351         return result;
 352 }
 353
 354
 355 void InsetFormula::handleExtern(const string & arg)
 356 {
 357         // where are we?
 358         if (!mathcursor)
 359                 return;
 360
 361         bool selected = mathcursor->selection();
 362
 363         MathArray ar;
 364         if (selected) {
 365                 mathcursor->selGet(ar);
 366                 lyxerr << "use selection: " << ar << "\n";
 367         } else {
 368                 mathcursor->end();
 369                 ar = mathcursor->cursor().cell();
 370                 stripFromLastEqualSign(ar);
 371                 mathcursor->insert(MathAtom(new MathCharInset('=', LM_TC_VAR)));
 372                 lyxerr << "use whole cell: " << ar << "\n";
 373         }
 374
 375         mathcursor->insert(pipeThroughExtern(arg, ar));
 376 }
 377
 378
 379 bool InsetFormula::display() const
 380 {
 381         return mat()->getType() != LM_OT_SIMPLE;
 382 }
 383
 384
 385 MathMatrixInset const * InsetFormula::mat() const
 386 {
 387         lyx::Assert(par_->asMatrixInset());
 388         return par_->asMatrixInset();
 389 }
 390
 391
 392 MathMatrixInset * InsetFormula::mat()
 393 {
 394         lyx::Assert(par_->asMatrixInset());
 395         return par_->asMatrixInset();
 396 }
 397
 398
 399 Inset::Code InsetFormula::lyxCode() const
 400 {
 401         return Inset::MATH_CODE;
 402 }
 403
 404
 405 void InsetFormula::validate(LaTeXFeatures & features) const
 406 {
 407         par_->validate(features);
 408 }
 409
 410
 411 bool InsetFormula::insetAllowed(Inset::Code code) const
 412 {
 413         return code == Inset::LABEL_CODE && display();
 414 }
 415
 416
 417 int InsetFormula::ascent(BufferView *, LyXFont const &) const
 418 {
 419         return par_->ascent() + 2;
 420 }
 421
 422
 423 int InsetFormula::descent(BufferView *, LyXFont const &) const
 424 {
 425         return par_->descent() - 2;
 426 }
 427
 428
 429 int InsetFormula::width(BufferView * bv, LyXFont const & font) const
 430 {
 431         metrics(bv, font);
 432         return par_->width();
 433 }
 434
 435
 436 MathInsetTypes InsetFormula::getType() const
 437 {
 438         return mat()->getType();
 439 }