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
  18 #include "Lsstream.h"
  19
  20 #ifdef __GNUG__
  21 #pragma implementation
  22 #endif
  23
  24 #include "formula.h"
  25 #include "commandtags.h"
  26 #include "math_cursor.h"
  27 #include "math_parser.h"
  28 #include "lyx_main.h"
  29 #include "minibuffer.h"
  30 #include "BufferView.h"
  31 #include "lyxtext.h"
  32 #include "gettext.h"
  33 #include "LaTeXFeatures.h"
  34 #include "debug.h"
  35 #include "lyx_gui_misc.h"
  36 #include "support/LOstream.h"
  37 #include "LyXView.h"
  38 #include "Painter.h"
  39 #include "font.h"
  40 #include "support/lyxlib.h"
  41 #include "lyxrc.h"
  42 #include "math_inset.h"
  43 #include "math_parinset.h"
  44 #include "math_matrixinset.h"
  45 #include "math_rowst.h"
  46 #include "math_spaceinset.h"
  47 #include "math_deliminset.h"
  48 #include "mathed/support.h"
  49
  50 using std::ostream;
  51 using std::istream;
  52 using std::pair;
  53 using std::endl;
  54 using std::vector;
  55 using std::max;
  56
  57 extern string mathed_label;
  58
  59 extern char const * latex_special_chars;
  60
  61 int greek_kb_flag = 0;
  62 extern char const * latex_mathenv[];
  63
  64 // this is only used by Whichfont and mathed_init_fonts (Lgb)
  65 LyXFont * Math_Fonts = 0;
  66
  67 static LyXFont::FONT_SIZE lfont_size = LyXFont::SIZE_NORMAL;
  68
  69 // local global
  70 static int sel_x;
  71 static int sel_y;
  72 static bool sel_flag;
  73
  74 // quite a hack i know. Should be done with return values...
  75 int number_of_newlines = 0;
  76
  77 static
  78 int mathed_write(MathParInset *, std::ostream &, bool fragile,
  79                  string const & label = string());
  80
  81 void mathed_init_fonts();
  82
  83 static
  84 void mathedValidate(LaTeXFeatures & features, MathParInset * par);
  85
  86
  87 MathedCursor * InsetFormula::mathcursor = 0;
  88
  89
  90 LyXFont WhichFont(short type, int size)
  91 {
  92         LyXFont f;
  93
  94         if (!Math_Fonts)
  95                 mathed_init_fonts();
  96
  97         switch (type) {
  98         case LM_TC_SYMB:
  99                 f = Math_Fonts[2];
 100                 break;
 101
 102         case LM_TC_BSYM:
 103                 f = Math_Fonts[2];
 104                 break;
 105
 106         case LM_TC_VAR:
 107         case LM_TC_IT:
 108                 f = Math_Fonts[0];
 109                 break;
 110
 111         case LM_TC_BF:
 112                 f = Math_Fonts[3];
 113                 break;
 114
 115         case LM_TC_SF:
 116                 f = Math_Fonts[7];
 117                 break;
 118
 119         case LM_TC_CAL:
 120                 f = Math_Fonts[4];
 121                 break;
 122
 123         case LM_TC_TT:
 124                 f = Math_Fonts[5];
 125                 break;
 126
 127         case LM_TC_SPECIAL: //f = Math_Fonts[0]; break;
 128         case LM_TC_TEXTRM:
 129         case LM_TC_RM:
 130                 f = Math_Fonts[6];
 131                 break;
 132
 133         default:
 134                 f = Math_Fonts[1];
 135                 break;
 136         }
 137
 138         f.setSize(lfont_size);
 139
 140         switch (size) {
 141         case LM_ST_DISPLAY:
 142                 if (type == LM_TC_BSYM) {
 143                         f.incSize();
 144                         f.incSize();
 145                 }
 146                 break;
 147
 148         case LM_ST_TEXT:
 149                 break;
 150
 151         case LM_ST_SCRIPT:
 152                 f.decSize();
 153                 break;
 154
 155         case LM_ST_SCRIPTSCRIPT:
 156                 f.decSize();
 157                 f.decSize();
 158                 break;
 159
 160         default:
 161                 lyxerr << "Mathed Error: wrong font size: " << size << endl;
 162                 break;
 163         }
 164
 165         if (type != LM_TC_TEXTRM)
 166                 f.setColor(LColor::math);
 167
 168         return f;
 169 }
 170
 171
 172 void mathed_init_fonts() //removed 'static' because DEC cxx does not
 173 //like it (JMarc)
 174 // Probably because this func is declared as a friend in math_defs.h
 175 // Lgb
 176 {
 177         Math_Fonts = new LyXFont[8]; //DEC cxx cannot initialize all fonts
 178         //at once (JMarc) rc
 179
 180         for (int i = 0 ; i < 8 ; ++i) {
 181                 Math_Fonts[i] = LyXFont(LyXFont::ALL_SANE);
 182         }
 183
 184         Math_Fonts[0].setShape(LyXFont::ITALIC_SHAPE);
 185
 186         Math_Fonts[1].setFamily(LyXFont::SYMBOL_FAMILY);
 187
 188         Math_Fonts[2].setFamily(LyXFont::SYMBOL_FAMILY);
 189         Math_Fonts[2].setShape(LyXFont::ITALIC_SHAPE);
 190
 191         Math_Fonts[3].setSeries(LyXFont::BOLD_SERIES);
 192
 193         Math_Fonts[4].setFamily(LyXFont::SANS_FAMILY);
 194         Math_Fonts[4].setShape(LyXFont::ITALIC_SHAPE);
 195
 196         Math_Fonts[5].setFamily(LyXFont::TYPEWRITER_FAMILY);
 197
 198         Math_Fonts[6].setFamily(LyXFont::ROMAN_FAMILY);
 199
 200         Math_Fonts[7].setFamily(LyXFont::SANS_FAMILY);
 201
 202         LyXFont f = WhichFont(LM_TC_VAR, LM_ST_TEXT);
 203         MathedInset::defaultAscent(lyxfont::maxAscent(f));
 204         MathedInset::defaultDescent(lyxfont::maxDescent(f));
 205         MathedInset::defaultWidth(lyxfont::width('I', f));
 206 }
 207
 208
 209
 210 InsetFormula::InsetFormula(bool display)
 211 {
 212         par = new MathParInset; // this leaks
 213         //  mathcursor = 0;
 214         disp_flag = display;
 215         //label = 0;
 216         if (disp_flag) {
 217                 par->SetType(LM_OT_PAR);
 218                 par->SetStyle(LM_ST_DISPLAY);
 219         }
 220 }
 221
 222
 223 InsetFormula::InsetFormula(MathParInset * p)
 224 {
 225         if (is_matrix_type(p->GetType()))
 226                 lyxerr << "InsetFormula::InsetFormula: This shouldn't happen" << endl;
 227
 228         par = is_multiline(p->GetType()) ?
 229                 new MathMatrixInset(static_cast<MathMatrixInset*>(p)):
 230                 new MathParInset(*p);
 231         //   mathcursor = 0;
 232
 233         disp_flag = (par->GetType()>0);
 234         //label = 0;
 235 }
 236
 237
 238 InsetFormula::~InsetFormula()
 239 {
 240         delete par;
 241 }
 242
 243
 244 Inset * InsetFormula::Clone(Buffer const &) const
 245 {
 246         InsetFormula * f = new InsetFormula(par);
 247         f->label = label;
 248         return f;
 249 }
 250
 251
 252 void InsetFormula::Write(Buffer const * buf, ostream & os) const
 253 {
 254         os << "Formula ";
 255         Latex(buf, os, false, false);
 256 }
 257
 258
 259 int InsetFormula::Latex(Buffer const *, ostream & os, bool fragile, bool) const
 260 {
 261         //#warning Alejandro, the number of lines is not returned in this case
 262         // This problem will disapear at 0.13.
 263         return mathed_write(par, os, fragile, label);
 264 }
 265
 266
 267 int InsetFormula::Ascii(Buffer const *, ostream & os, int) const
 268 {
 269         par->Write(os, false);
 270         return 0;
 271 }
 272
 273
 274 int InsetFormula::Linuxdoc(Buffer const * buf, ostream & os) const
 275 {
 276         return Ascii(buf, os, 0);
 277 }
 278
 279
 280 int InsetFormula::DocBook(Buffer const * buf, ostream & os) const
 281 {
 282         return Ascii(buf, os, 0);
 283 }
 284
 285
 286 // Check if uses AMS macros
 287 void InsetFormula::Validate(LaTeXFeatures & features) const
 288 {
 289         if (is_ams(par->GetType()))
 290                 features.amsstyle = true;
 291
 292         // Validation is necessary only if not using AMS math.
 293         // To be safe, we will always run mathedValidate.
 294         //if (!features.amsstyle)
 295         mathedValidate(features, par);
 296 }
 297
 298
 299 void InsetFormula::Read(Buffer const *, LyXLex & lex)
 300 {
 301         istream & is = lex.getStream();
 302
 303         mathed_parser_file(is, lex.GetLineNo());
 304
 305         // Silly hack to read labels.
 306         mathed_label.erase();
 307
 308         MathedArray ar;
 309         mathed_parse(ar, 0, &par);
 310         par->Metrics();
 311         disp_flag = (par->GetType() > 0);
 312
 313         // Update line number
 314         lex.setLineNo(mathed_parser_lineno());
 315
 316         if (!mathed_label.empty()) {
 317                 label = mathed_label;
 318                 mathed_label.erase();
 319         }
 320
 321         // reading of end_inset in the inset!!!
 322         while (lex.IsOK()) {
 323                 lex.nextToken();
 324                 if (lex.GetString() == "\\end_inset")
 325                         break;
 326                 lyxerr << "InsetFormula::Read: Garbage before \\end_inset,"
 327                         " or missing \\end_inset!" << endl;
 328         }
 329
 330 #ifdef DEBUG
 331         Write(lyxerr);
 332 #endif
 333 }
 334
 335
 336 int InsetFormula::ascent(BufferView *, LyXFont const &) const
 337 {
 338         return par->Ascent() + (disp_flag ? 8 : 1);
 339 }
 340
 341
 342 int InsetFormula::descent(BufferView *, LyXFont const &) const
 343 {
 344         return par->Descent() + (disp_flag ? 8 : 1);
 345 }
 346
 347
 348 int InsetFormula::width(BufferView * bv, LyXFont const & f) const
 349 {
 350         MathedInset::workWidth = bv->workWidth();
 351         lfont_size = f.size();
 352         par->Metrics();
 353         return par->Width(); //+2;
 354 }
 355
 356
 357 void InsetFormula::draw(BufferView * bv, LyXFont const & f,
 358                         int baseline, float & x, bool) const
 359 {
 360         MathedInset::workWidth = bv->workWidth();
 361         Painter & pain = bv->painter();
 362         // Seems commenting out solves a problem.
 363         LyXFont font = mathed_get_font(LM_TC_TEXTRM, LM_ST_TEXT);
 364         font.setSize(f.size());
 365         lfont_size = font.size();
 366         /// Let's try to wait a bit with this... (Lgb)
 367         //UpdatableInset::draw(pain, font, baseline, x);
 368
 369         // otherwise a segfault could occur
 370         // in some XDrawRectangles (i.e. matrix) (Matthias)
 371         if (mathcursor && mathcursor->GetPar() == par) {
 372                 if (mathcursor->Selection()) {
 373                         int n;
 374                         int * xp = 0;
 375                         int * yp = 0;
 376                         mathcursor->SelGetArea(&xp, &yp, n);
 377                         pain.fillPolygon(xp, yp, n, LColor::selection);
 378                 }
 379                 mathcursor->draw(pain, int(x), baseline);
 380         } else {
 381                 par->draw(pain, int(x), baseline);
 382         }
 383         x += float(width(bv, font));
 384
 385         if (is_numbered(par->GetType())) {
 386                 LyXFont wfont = WhichFont(LM_TC_BF, par->size());
 387                 wfont.setLatex(LyXFont::OFF);
 388
 389                 if (is_singlely_numbered(par->GetType())) {
 390                         string str;
 391                         if (!label.empty())
 392                                 str = string("(") + label + ")";
 393                         else
 394                                 str = string("(#)");
 395                         pain.text(int(x + 20), baseline, str, wfont);
 396                 } else {
 397                         MathMatrixInset * mt =
 398                                 static_cast<MathMatrixInset*>(par);
 399                         int y;
 400                         MathedRowSt const * crow = mt->getRowSt();
 401                         while (crow) {
 402                                 y = baseline + crow->getBaseline();
 403                                 if (crow->isNumbered()) {
 404                                         string str;
 405                                         if (!crow->getLabel().empty())
 406                                                 str = string("(") + crow->getLabel() + ")";
 407                                         else
 408                                                 str = "(#)";
 409                                         pain.text(int(x + 20), y, str, wfont);
 410                                 }
 411                                 crow = crow->getNext();
 412                         }
 413                 }
 414         }
 415         cursor_visible = false;
 416 }
 417
 418
 419 string const InsetFormula::EditMessage() const
 420 {
 421         return _("Math editor mode");
 422 }
 423
 424
 425 void InsetFormula::Edit(BufferView * bv, int x, int y, unsigned int)
 426 {
 427         mathcursor = new MathedCursor(par);
 428
 429         if (!bv->lockInset(this))
 430                 lyxerr[Debug::MATHED] << "Cannot lock inset!!!" << endl;
 431
 432         par->Metrics();
 433         bv->updateInset(this, false);
 434         x += par->xo();
 435         y += par->yo();
 436         mathcursor->SetPos(x, y);
 437         sel_x = 0;
 438         sel_y = 0;
 439         sel_flag = false;
 440 }
 441
 442
 443 void InsetFormula::InsetUnlock(BufferView * bv)
 444 {
 445         if (mathcursor) {
 446                 if (mathcursor->InMacroMode()) {
 447                         mathcursor->MacroModeClose();
 448                         UpdateLocal(bv);
 449                 }
 450                 delete mathcursor;
 451         }
 452         mathcursor = 0;
 453         bv->updateInset(this, false);
 454 }
 455
 456
 457 // Now a symbol can be inserted only if the inset is locked
 458 void InsetFormula::InsertSymbol(BufferView * bv, string const & s)
 459 {
 460         if (s.empty() || !mathcursor)
 461                 return;
 462         mathcursor->Interpret(s);
 463         UpdateLocal(bv);
 464 }
 465
 466
 467 void InsetFormula::GetCursorPos(BufferView *, int & x, int & y) const
 468 {
 469         mathcursor->GetPos(x, y);
 470         x -= par->xo();
 471         y -= par->yo();
 472 }
 473
 474
 475 void InsetFormula::ToggleInsetCursor(BufferView * bv)
 476 {
 477         if (!mathcursor)
 478                 return;
 479
 480         int x;
 481         int y;
 482         mathcursor->GetPos(x, y);
 483         //  x -= par->xo;
 484         y -= par->yo();
 485         LyXFont font = WhichFont(LM_TC_TEXTRM, LM_ST_TEXT);
 486         int asc = lyxfont::maxAscent(font);
 487         int desc = lyxfont::maxDescent(font);
 488
 489         if (cursor_visible)
 490                 bv->hideLockedInsetCursor();
 491         else
 492                 bv->showLockedInsetCursor(x, y, asc, desc);
 493
 494         cursor_visible = !cursor_visible;
 495 }
 496
 497
 498 void InsetFormula::ShowInsetCursor(BufferView * bv, bool)
 499 {
 500         if (!cursor_visible) {
 501                 if (mathcursor) {
 502                         int x;
 503                         int y;
 504                         mathcursor->GetPos(x, y);
 505                         //  x -= par->xo;
 506                         y -= par->yo();
 507                         LyXFont font = WhichFont(LM_TC_TEXTRM, LM_ST_TEXT);
 508                         int asc = lyxfont::maxAscent(font);
 509                         int desc = lyxfont::maxDescent(font);
 510                         bv->fitLockedInsetCursor(x, y, asc, desc);
 511                 }
 512                 ToggleInsetCursor(bv);
 513         }
 514 }
 515
 516
 517 void InsetFormula::HideInsetCursor(BufferView * bv)
 518 {
 519         if (cursor_visible)
 520                 ToggleInsetCursor(bv);
 521 }
 522
 523
 524 void InsetFormula::ToggleInsetSelection(BufferView * bv)
 525 {
 526         if (!mathcursor)
 527                 return;
 528
 529         bv->updateInset(this, false);
 530 }
 531
 532
 533 void InsetFormula::display(bool dspf)
 534 {
 535         if (dspf != disp_flag) {
 536                 if (dspf) {
 537                         par->SetType(LM_OT_PAR);
 538                         par->SetStyle(LM_ST_DISPLAY);
 539                 } else {
 540                         if (is_multiline(par->GetType())) {
 541                                 if (mathcursor)
 542                                         mathcursor->SetPar(par);
 543                         }
 544                         par->SetType(LM_OT_MIN);
 545                         par->SetStyle(LM_ST_TEXT);
 546                         if (!label.empty()) {
 547                                 label.erase();
 548                         }
 549                 }
 550                 disp_flag = dspf;
 551         }
 552 }
 553
 554
 555 vector<string> const InsetFormula::getLabelList() const
 556 {
 557         //#warning This is dirty, I know. Ill clean it at 0.11
 558         // Correction, the only way to clean this is with a new kernel: 0.13.
 559
 560         vector<string> label_list;
 561
 562         if (is_multi_numbered(par->GetType())) {
 563                 MathMatrixInset * mt = static_cast<MathMatrixInset*>(par);
 564                 MathedRowSt const * crow = mt->getRowSt();
 565                 while (crow) {
 566                         if (!crow->getLabel().empty())
 567                                 label_list.push_back(crow->getLabel());
 568                         crow = crow->getNext();
 569                 }
 570         } else if (!label.empty())
 571                 label_list.push_back(label);
 572
 573         return label_list;
 574 }
 575
 576
 577 void InsetFormula::UpdateLocal(BufferView * bv)
 578 {
 579         par->Metrics();  // To inform lyx kernel the exact size
 580         // (there were problems with arrays).
 581         bv->updateInset(this, true);
 582 }
 583
 584
 585 void InsetFormula::InsetButtonRelease(BufferView * bv,
 586                                       int x, int y, int /*button*/)
 587 {
 588         if (mathcursor) {
 589                 HideInsetCursor(bv);
 590                 x += par->xo();
 591                 y += par->yo();
 592                 mathcursor->SetPos(x, y);
 593                 ShowInsetCursor(bv);
 594                 if (sel_flag) {
 595                         sel_flag = false;
 596                         sel_x = sel_y = 0;
 597                         bv->updateInset(this, false);
 598                 }
 599         }
 600 }
 601
 602
 603 void InsetFormula::InsetButtonPress(BufferView * bv, int x, int y,
 604                                     int /*button*/)
 605 {
 606         sel_flag = false;
 607         sel_x = x;  sel_y = y;
 608         if (mathcursor && mathcursor->Selection()) {
 609                 mathcursor->SelClear();
 610                 bv->updateInset(this, false);
 611         }
 612 }
 613
 614
 615 void InsetFormula::InsetMotionNotify(BufferView * bv,
 616                                      int x, int y, int /*button*/)
 617 {
 618         if (sel_x && sel_y && abs(x-sel_x) > 4 && !sel_flag) {
 619                 sel_flag = true;
 620                 HideInsetCursor(bv);
 621                 mathcursor->SetPos(sel_x + par->xo(), sel_y + par->yo());
 622                 mathcursor->SelStart();
 623                 ShowInsetCursor(bv);
 624                 mathcursor->GetPos(sel_x, sel_y);
 625         } else if (sel_flag) {
 626                 HideInsetCursor(bv);
 627                 x += par->xo();
 628                 y += par->yo();
 629                 mathcursor->SetPos(x, y);
 630                 ShowInsetCursor(bv);
 631                 mathcursor->GetPos(x, y);
 632                 if (sel_x != x || sel_y != y)
 633                         bv->updateInset(this, false);
 634                 sel_x = x;
 635                 sel_y = y;
 636         }
 637 }
 638
 639
 640 void InsetFormula::InsetKeyPress(XKeyEvent *)
 641 {
 642         lyxerr[Debug::MATHED] << "Used InsetFormula::InsetKeyPress." << endl;
 643 }
 644
 645
 646 // Special Mathed functions
 647 bool InsetFormula::SetNumber(bool numbf)
 648 {
 649         if (disp_flag) {
 650                 short type = par->GetType();
 651                 bool const oldf = is_numbered(type);
 652                 if (numbf && !oldf)
 653                         ++type;
 654                 if (!numbf && oldf)
 655                         --type;
 656                 par->SetType(type);
 657                 return oldf;
 658         } else
 659                 return false;
 660 }
 661
 662
 663 UpdatableInset::RESULT
 664 InsetFormula::LocalDispatch(BufferView * bv, kb_action action,
 665                             string const & arg)
 666 {
 667         //   extern char *dispatch_result;
 668         MathedTextCodes varcode = LM_TC_MIN;
 669         bool was_macro = mathcursor->InMacroMode();
 670         bool sel = false;
 671         bool space_on = false;
 672         bool was_selection = mathcursor->Selection();
 673         RESULT result = DISPATCHED;
 674         static MathSpaceInset * sp= 0;
 675
 676         HideInsetCursor(bv);
 677
 678         if (mathcursor->getLastCode() == LM_TC_TEX) {
 679                 varcode = LM_TC_TEX;
 680         }
 681
 682         switch (action) {
 683                 // --- Cursor Movements ---------------------------------------------
 684         case LFUN_RIGHTSEL:
 685                 sel = true; // fall through...
 686
 687         case LFUN_RIGHT:
 688                 result = DISPATCH_RESULT(mathcursor->Right(sel));
 689                 if (!sel && (result == DISPATCHED))
 690                         result = DISPATCHED_NOUPDATE;
 691                 break;
 692
 693
 694         case LFUN_LEFTSEL:
 695                 sel = true; // fall through
 696
 697         case LFUN_LEFT:
 698                 result = DISPATCH_RESULT(mathcursor->Left(sel));
 699                 if (!sel && (result == DISPATCHED))
 700                         result = DISPATCHED_NOUPDATE;
 701                 break;
 702
 703
 704         case LFUN_UPSEL:
 705                 sel = true;
 706
 707         case LFUN_UP:
 708                 result = DISPATCH_RESULT(mathcursor->Up(sel));
 709                 if (!sel && (result == DISPATCHED))
 710                         result = DISPATCHED_NOUPDATE;
 711                 break;
 712
 713
 714         case LFUN_DOWNSEL:
 715                 sel = true;
 716
 717         case LFUN_DOWN:
 718                 result = DISPATCH_RESULT(mathcursor->Down(sel));
 719                 if (!sel && (result == DISPATCHED))
 720                         result = DISPATCHED_NOUPDATE;
 721                 break;
 722
 723
 724         case LFUN_HOME:
 725                 mathcursor->Home();
 726                 result = DISPATCHED_NOUPDATE;
 727                 break;
 728
 729         case LFUN_END:
 730                 mathcursor->End();
 731                 result = DISPATCHED_NOUPDATE;
 732                 break;
 733
 734         case LFUN_DELETE_LINE_FORWARD:
 735                 bv->lockedInsetStoreUndo(Undo::DELETE);
 736                 mathcursor->DelLine();
 737                 UpdateLocal(bv);
 738                 break;
 739
 740         case LFUN_BREAKLINE:
 741         {
 742                 bv->lockedInsetStoreUndo(Undo::INSERT);
 743                 byte c = arg.empty() ? '1' : arg[0];
 744                 mathcursor->Insert(c, LM_TC_CR);
 745                 if (!label.empty()) {
 746                         mathcursor->setLabel(label);
 747                         label.erase();
 748                 }
 749                 par = mathcursor->GetPar();
 750                 UpdateLocal(bv);
 751         }
 752         break;
 753
 754         case LFUN_TAB:
 755                 bv->lockedInsetStoreUndo(Undo::INSERT);
 756                 mathcursor->Insert(0, LM_TC_TAB);
 757                 //UpdateInset(this);
 758                 break;
 759
 760         case LFUN_TABINSERT:
 761                 bv->lockedInsetStoreUndo(Undo::INSERT);
 762                 mathcursor->Insert('T', LM_TC_TAB);
 763                 UpdateLocal(bv);
 764                 break;
 765
 766         case LFUN_BACKSPACE:
 767                 if (!mathcursor->Left())
 768                         break;
 769
 770                 if (!mathcursor->InMacroMode() && mathcursor->pullArg()) {
 771                         bv->updateInset(this, true);
 772                         break;
 773                 }
 774                 // fall through...
 775
 776         case LFUN_DELETE:
 777                 bv->lockedInsetStoreUndo(Undo::DELETE);
 778                 mathcursor->Delete();
 779                 bv->updateInset(this, true);
 780                 break;
 781
 782                 //    case LFUN_GETXY:
 783                 //      sprintf(dispatch_buffer, "%d %d",);
 784                 //      dispatch_result = dispatch_buffer;
 785                 //      break;
 786         case LFUN_SETXY:
 787         {
 788                 int x;
 789                 int y;
 790                 int x1;
 791                 int y1;
 792                 istringstream ist(arg.c_str());
 793                 ist >> x >> y;
 794                 par->GetXY(x1, y1);
 795                 mathcursor->SetPos(x1 + x, y1 + y);
 796         }
 797         break;
 798
 799                 /* cursor selection ---------------------------- */
 800
 801         case LFUN_PASTE:
 802                 if (was_macro)
 803                         mathcursor->MacroModeClose();
 804                 bv->lockedInsetStoreUndo(Undo::INSERT);
 805                 mathcursor->SelPaste();
 806                 UpdateLocal(bv);
 807                 break;
 808
 809         case LFUN_CUT:
 810                 bv->lockedInsetStoreUndo(Undo::DELETE);
 811                 mathcursor->SelCut();
 812                 UpdateLocal(bv);
 813                 break;
 814
 815         case LFUN_COPY:
 816                 mathcursor->SelCopy();
 817                 break;
 818
 819         case LFUN_HOMESEL:
 820         case LFUN_ENDSEL:
 821         case LFUN_WORDRIGHTSEL:
 822         case LFUN_WORDLEFTSEL:
 823                 break;
 824
 825                 // --- accented characters ------------------------------
 826
 827         case LFUN_UMLAUT:     mathcursor->setAccent(LM_ddot); break;
 828         case LFUN_CIRCUMFLEX: mathcursor->setAccent(LM_hat); break;
 829         case LFUN_GRAVE:      mathcursor->setAccent(LM_grave); break;
 830         case LFUN_ACUTE:      mathcursor->setAccent(LM_acute); break;
 831         case LFUN_TILDE:      mathcursor->setAccent(LM_tilde); break;
 832         case LFUN_MACRON:     mathcursor->setAccent(LM_bar); break;
 833         case LFUN_DOT:        mathcursor->setAccent(LM_dot); break;
 834         case LFUN_CARON:      mathcursor->setAccent(LM_check); break;
 835         case LFUN_BREVE:      mathcursor->setAccent(LM_breve); break;
 836         case LFUN_VECTOR:     mathcursor->setAccent(LM_vec); break;
 837
 838                 // Greek mode
 839         case LFUN_GREEK:
 840                 if (!greek_kb_flag) {
 841                         greek_kb_flag = 1;
 842                         bv->owner()->getMiniBuffer()->Set(_("Math greek mode on"));
 843                 } else
 844                         greek_kb_flag = 0;
 845                 break;
 846
 847                 // Greek keyboard
 848         case LFUN_GREEK_TOGGLE:
 849                 greek_kb_flag = (greek_kb_flag) ? 0 : 2;
 850                 if (greek_kb_flag)
 851                         bv->owner()->getMiniBuffer()->Set(_("Math greek keyboard on"));
 852                 else
 853                         bv->owner()->getMiniBuffer()->Set(_("Math greek keyboard off"));
 854                 break;
 855
 856                 //  Math fonts
 857         case LFUN_BOLD:  mathcursor->toggleLastCode(LM_TC_BF); break;
 858         case LFUN_SANS:  mathcursor->toggleLastCode(LM_TC_SF); break;
 859         case LFUN_EMPH:  mathcursor->toggleLastCode(LM_TC_CAL); break;
 860         case LFUN_ROMAN: mathcursor->toggleLastCode(LM_TC_RM); break;
 861         case LFUN_CODE:  mathcursor->toggleLastCode(LM_TC_TT); break;
 862         case LFUN_DEFAULT:  mathcursor->setLastCode(LM_TC_VAR); break;
 863
 864         case LFUN_TEX:
 865                 // varcode = LM_TC_TEX;
 866                 mathcursor->setLastCode(LM_TC_TEX);
 867                 bv->owner()->getMiniBuffer()->Set(_("TeX mode"));
 868                 break;
 869
 870         case LFUN_MATH_NUMBER:
 871                 bv->lockedInsetStoreUndo(Undo::INSERT);
 872                 if (disp_flag) {
 873                         short type = par->GetType();
 874                         if (is_numbered(type)) {
 875                                 --type;
 876                                 if (!label.empty()) {
 877                                         label.erase();
 878                                 }
 879                                 bv->owner()->getMiniBuffer()->Set(_("No number"));
 880                         } else {
 881                                 ++type;
 882                                 bv->owner()->getMiniBuffer()->Set(_("Number"));
 883                         }
 884                         par->SetType(type);
 885                         UpdateLocal(bv);
 886                 }
 887                 break;
 888
 889         case LFUN_MATH_NONUMBER:
 890                 if (is_multi_numbered(par->GetType())) {
 891                                 //         MathMatrixInset *mt = (MathMatrixInset*)par;
 892                                 //BUG
 893                                 //         mt->SetNumbered(!mt->IsNumbered());
 894
 895 #warning This is a terrible hack! We should find a better solution.
 896                         while (mathcursor->getLabel() == MathedXIter::error_label) {
 897                                 if (LocalDispatch(bv, LFUN_LEFT, string()) == FINISHED)
 898                                         return DISPATCHED;
 899                         }
 900                         mathcursor->setNumbered();
 901                         UpdateLocal(bv);
 902                 }
 903                 break;
 904
 905         case LFUN_MATH_LIMITS:
 906                 bv->lockedInsetStoreUndo(Undo::INSERT);
 907                 if (mathcursor->Limits())
 908                         UpdateLocal(bv);
 909                 // fall through!
 910
 911         case LFUN_MATH_SIZE:
 912                 if (!arg.empty()) {
 913                         latexkeys const * l = in_word_set(arg);
 914                         int sz = (l) ? l->id: -1;
 915                         mathcursor->SetSize(sz);
 916                         UpdateLocal(bv);
 917                         break;
 918                 }
 919                 // possible fall through?
 920
 921         case LFUN_INSERT_MATH:
 922                 bv->lockedInsetStoreUndo(Undo::INSERT);
 923                 InsertSymbol(bv, arg);
 924                 break;
 925
 926
 927         case LFUN_INSERT_MATRIX:
 928         {
 929                 bv->lockedInsetStoreUndo(Undo::INSERT);
 930                 int k, m, n;
 931                 char s[80], arg2[80];
 932                                 // This is just so that too long args won't ooze out of s.
 933                 strncpy(arg2, arg.c_str(), 80); arg2[79]= '\0';
 934                 k = sscanf(arg2, "%d %d %s", &m, &n, s);
 935                 s[79] = '\0';
 936
 937                 if (k < 1) {
 938                         m = n = 1;
 939                 } else if (k == 1) {
 940                         n = 1;
 941                 }
 942
 943                 MathMatrixInset * p = new MathMatrixInset(m, n);
 944                 if (mathcursor && p) {
 945                         if (k > 2 && int(strlen(s)) > m)
 946                                 p->SetAlign(s[0], &s[1]);
 947                         mathcursor->insertInset(p, LM_TC_ACTIVE_INSET);
 948                         UpdateLocal(bv);
 949                 }
 950                 break;
 951         }
 952
 953         case LFUN_MATH_DELIM:
 954         {
 955                 bv->lockedInsetStoreUndo(Undo::INSERT);
 956                 char lf[40], rg[40], arg2[40];
 957                 int ilf = '(', irg = '.';
 958                 latexkeys const * l;
 959                 string vdelim("(){}[]./|");
 960
 961                 if (arg.empty())
 962                         break;
 963                 ::strncpy(arg2, arg.c_str(), 40);
 964                 arg2[39]= '\0';
 965                 int n = sscanf(arg2, "%s %s", lf, rg);
 966                 lf[39] = '\0';
 967                 rg[39] = '\0';
 968
 969                 if (n > 0) {
 970                         if (isdigit(lf[0]))
 971                                 ilf = lyx::atoi(lf);
 972                         else
 973                                 if (lf[1]) {
 974                                         l = in_word_set(lf, strlen(lf));
 975                                         // Long words will cause l == 0; so check.
 976                                         if (l)
 977                                                 ilf = l->id;
 978                                 } else if (vdelim.find(lf[0]) != string::npos)
 979                                         ilf = lf[0];
 980
 981                         if (n > 1) {
 982                                 if (isdigit(rg[0]))
 983                                         irg = lyx::atoi(rg);
 984                                 else
 985                                         if (rg[1]) {
 986                                                 l = in_word_set(rg, strlen(rg));
 987                                                 if (l)
 988                                                         irg = l->id;
 989                                         } else if (vdelim.find(rg[0]) != string::npos)
 990                                                 irg = rg[0];
 991                         }
 992                 }
 993
 994                 MathDelimInset * p = new MathDelimInset(ilf, irg);
 995                 mathcursor->insertInset(p, LM_TC_ACTIVE_INSET);
 996                 UpdateLocal(bv);
 997                 break;
 998         }
 999
1000         case LFUN_PROTECTEDSPACE:
1001                 bv->lockedInsetStoreUndo(Undo::INSERT);
1002                 sp = new MathSpaceInset(1);
1003                 mathcursor->insertInset(sp, LM_TC_INSET);
1004                 space_on = true;
1005                 UpdateLocal(bv);
1006                 break;
1007
1008         case LFUN_INSERT_LABEL:
1009         {
1010                 bv->lockedInsetStoreUndo(Undo::INSERT);
1011                 if (par->GetType() < LM_OT_PAR)
1012                         break;
1013
1014                 string old_label = is_multiline(par->GetType())
1015                         ? mathcursor->getLabel() : label;
1016
1017 #warning This is a terrible hack! We should find a better solution.
1018                 // This is needed because in some positions
1019                 // mathcursor->cursor->crow is equal to 0, and therefore
1020                 // the label cannot be inserted.
1021                 // So we move the cursor left until
1022                 // mathcursor->cursor->crow != 0.
1023                 while (old_label == MathedXIter::error_label) {
1024                         if (LocalDispatch(bv, LFUN_LEFT, string()) == FINISHED)
1025                                 return DISPATCHED;
1026                         old_label = mathcursor->getLabel();
1027                 }
1028
1029                 string new_label = arg;
1030                 if (new_label.empty()) {
1031                         string default_label = (lyxrc.label_init_length >= 0) ? "eq:" : "";
1032                         pair<bool, string> res = old_label.empty()
1033                                 ? askForText(_("Enter new label to insert:"), default_label)
1034                                 : askForText(_("Enter label:"), old_label);
1035                         if (!res.first)
1036                                 break;
1037                         new_label = frontStrip(strip(res.second));
1038                 }
1039
1040                 if (new_label == old_label)
1041                         break;  // Nothing to do
1042
1043                 if (!new_label.empty())
1044                         SetNumber(true);
1045
1046                 if (!new_label.empty() && bv->ChangeRefsIfUnique(old_label, new_label))
1047                         bv->redraw();
1048
1049                 if (is_multi_numbered(par->GetType())) {
1050                         mathcursor->setLabel(new_label);
1051                         // MathMatrixInset *mt = (MathMatrixInset*)par;
1052                         // mt->SetLabel(new_label);
1053                 } else
1054                         label = new_label;
1055
1056                 UpdateLocal(bv);
1057                 break;
1058         }
1059
1060         case LFUN_MATH_DISPLAY:
1061                 bv->lockedInsetStoreUndo(Undo::EDIT);
1062                 display(!disp_flag);
1063                 UpdateLocal(bv);
1064                 break;
1065
1066                 // Invalid actions under math mode
1067         case LFUN_MATH_MODE:
1068                 if (mathcursor->getLastCode()!= LM_TC_TEXTRM) {
1069                         bv->owner()->getMiniBuffer()->Set(_("math text mode"));
1070                         varcode = LM_TC_TEXTRM;
1071                 } else {
1072                         varcode = LM_TC_VAR;
1073                 }
1074                 mathcursor->setLastCode(varcode);
1075                 break;
1076
1077         case LFUN_UNDO:
1078                 bv->owner()->getMiniBuffer()->Set(_("Invalid action in math mode!"));
1079                 break;
1080
1081                 //------- dummy actions
1082         case LFUN_EXEC_COMMAND:
1083                 bv->owner()->getMiniBuffer()->PrepareForCommand();
1084                 break;
1085
1086         default:
1087                 if ((action == -1  || action == LFUN_SELFINSERT) && !arg.empty())  {
1088                         unsigned char c = arg[0];
1089                         bv->lockedInsetStoreUndo(Undo::INSERT);
1090
1091                         if (c == ' ' && mathcursor->getAccent() == LM_hat) {
1092                                 c = '^';
1093                                 mathcursor->setAccent(0);
1094                         }
1095
1096                         if (c == 0) {      // Dead key, do nothing
1097                                 //lyxerr << "deadkey" << endl;
1098                                 break;
1099                         }
1100
1101                         if (isalpha(c)) {
1102                                 if (mathcursor->getLastCode() == LM_TC_TEX) {
1103                                         mathcursor->MacroModeOpen();
1104                                         mathcursor->clearLastCode();
1105                                         varcode = LM_TC_MIN;
1106                                 } else if (!varcode) {
1107                                         short f = (mathcursor->getLastCode()) ?
1108                                                 mathcursor->getLastCode() :
1109                                                 static_cast<MathedTextCodes>(mathcursor->GetFCode());
1110                                         varcode = MathIsAlphaFont(f) ?
1111                                                 static_cast<MathedTextCodes>(f) :
1112                                                 LM_TC_VAR;
1113                                 }
1114
1115                                 //           lyxerr << "Varcode << vardoce;
1116                                 MathedTextCodes char_code = varcode;
1117                                 if (greek_kb_flag) {
1118                                         char greek[26] =
1119                                         {'A', 'B', 'X',  0 , 'E',  0 ,  0 , 'H', 'I',  0 ,
1120                                          'K',  0 , 'M', 'N', 'O',  0 ,  0 , 'P',  0 , 'T',
1121                                          'Y',  0,   0,   0,   0 , 'Z' };
1122
1123                                         if ('A' <= c && c <= 'Z' && greek[c - 'A']) {
1124                                                 char_code = LM_TC_RM;
1125                                                 c = greek[c - 'A'];
1126                                         } else
1127                                                 char_code = LM_TC_SYMB;
1128                                 }
1129
1130                                 mathcursor->Insert(c, char_code);
1131
1132                                 if (greek_kb_flag && char_code == LM_TC_RM )
1133                                         mathcursor->setLastCode(LM_TC_VAR);
1134
1135                                 varcode = LM_TC_MIN;
1136
1137                                 if (greek_kb_flag<2)
1138                                         greek_kb_flag = 0;
1139
1140                         } else if (strchr("!,:;{}", c) && (varcode == LM_TC_TEX||was_macro)) {
1141                                 mathcursor->Insert(c, LM_TC_TEX);
1142                                 if (c == '{') {
1143                                         mathcursor->Insert('}', LM_TC_TEX);
1144                                         mathcursor->Left();
1145                                 }
1146                                 mathcursor->clearLastCode();
1147                                 //             varcode = LM_TC_MIN;
1148                         } else if (c == '_' && varcode == LM_TC_TEX) {
1149                                 mathcursor->Insert(c, LM_TC_SPECIAL);
1150                                 mathcursor->clearLastCode();
1151                                 //             varcode = LM_TC_MIN;
1152                         } else if (('0'<= c && c<= '9') && (varcode == LM_TC_TEX||was_macro)) {
1153                                 mathcursor->MacroModeOpen();
1154                                 mathcursor->clearLastCode();
1155                                 mathcursor->Insert(c, LM_TC_MIN);
1156                         } else if (('0'<= c && c<= '9') || strchr(";:!|[]().,?", c)) {
1157                                 mathcursor->Insert(c, LM_TC_CONST);
1158                         } else if (strchr("+/-*<>=", c)) {
1159                                 mathcursor->Insert(c, LM_TC_BOP);
1160                         } else if (strchr(latex_special_chars, c) && c!= '_') {
1161                                 mathcursor->Insert(c, LM_TC_SPECIAL);
1162                         } else if (c == '_' || c == '^') {
1163                                 char s[2];
1164                                 s[0] = c;
1165                                 s[1] = 0;
1166                                 mathcursor->Interpret(s);
1167                         } else if (c == ' ') {
1168                                 if (!varcode) {
1169                                         short f = (mathcursor->getLastCode()) ?
1170                                                 mathcursor->getLastCode() :
1171                                                 static_cast<MathedTextCodes>(mathcursor->GetFCode());
1172                                         varcode = MathIsAlphaFont(f) ?
1173                                                 static_cast<MathedTextCodes>(f) :
1174                                                 LM_TC_VAR;
1175                                 }
1176
1177                                 if (varcode == LM_TC_TEXTRM) {
1178                                         mathcursor->Insert(c, LM_TC_TEXTRM);
1179                                 } else if (was_macro) {
1180                                         mathcursor->MacroModeClose();
1181                                 } else if (sp) {
1182                                         int isp = (sp->GetSpace()<5) ? sp->GetSpace()+1: 0;
1183                                         sp->SetSpace(isp);
1184                                         space_on = true;
1185                                 } else if (!mathcursor->Pop() && mathcursor->IsEnd())
1186                                         result = FINISHED;
1187                         } else if (c == '\'' || c == '@') {
1188                                 mathcursor->Insert (c, LM_TC_VAR);
1189                         } else if (c == '\\') {
1190                                 if (was_macro)
1191                                         mathcursor->MacroModeClose();
1192                                 bv->owner()->getMiniBuffer()->Set(_("TeX mode"));
1193                                 mathcursor->setLastCode(LM_TC_TEX);
1194                         }
1195                         UpdateLocal(bv);
1196                 } else if (action == LFUN_MATH_PANEL) {
1197                         result = UNDISPATCHED;
1198                 } else {
1199                         // lyxerr << "Closed by action " << action << endl;
1200                         result =  FINISHED;
1201                 }
1202         }
1203
1204         if (was_macro != mathcursor->InMacroMode()
1205             && action >= 0
1206             && action != LFUN_BACKSPACE)
1207                 UpdateLocal(bv);
1208
1209         if (sp && !space_on)
1210                 sp = 0;
1211
1212         if (mathcursor->Selection() || was_selection)
1213                 ToggleInsetSelection(bv);
1214
1215         if ((result == DISPATCHED) || (result == DISPATCHED_NOUPDATE) ||
1216             (result == UNDISPATCHED))
1217                 ShowInsetCursor(bv);
1218         else
1219                 bv->unlockInset(this);
1220
1221         return result;
1222 }
1223
1224
1225
1226 static
1227 void mathedValidate(LaTeXFeatures & features, MathParInset * par)
1228 {
1229         MathedIter it(&par->GetData());
1230
1231         while (it.OK() && !(features.binom && features.boldsymbol)) {
1232                 if (it.IsInset()) {
1233                         if (it.IsActive()) {
1234                                 MathParInset * p = it.GetActiveInset();
1235                                 if (!features.binom && p->GetType() == LM_OT_MACRO &&
1236                                     p->GetName() == "binom") {
1237                                         features.binom = true;
1238                                 } else {
1239                                         for (int i = 0; i <= p->getMaxArgumentIdx(); ++i) {
1240                                                 p->setArgumentIdx(i);
1241                                                 mathedValidate(features, p);
1242                                         }
1243                                 }
1244                         } else {
1245                                 MathedInset * p = it.GetInset();
1246                                 if (!features.boldsymbol && p->GetName() == "boldsymbol") {
1247                                         features.boldsymbol = true;
1248                                 }
1249                         }
1250                 }
1251                 it.Next();
1252         }
1253 }
1254
1255
1256 static
1257 int mathed_write(MathParInset * p, ostream & os,
1258                  bool fragile, string const & label)
1259 {
1260         number_of_newlines = 0;
1261         short mathed_env = p->GetType();
1262
1263         if (mathed_env == LM_OT_MIN) {
1264                 if (fragile) os << "\\protect";
1265                 os << "\\( "; // changed from " \\( " (Albrecht Dress)
1266         } else {
1267                 if (mathed_env == LM_OT_PAR){
1268                         os << "\\[\n";
1269                 } else {
1270                         os << "\\begin{"
1271                            << latex_mathenv[mathed_env]
1272                            << "}";
1273                         if (is_multicolumn(mathed_env)) {
1274                                 if (mathed_env != LM_OT_ALIGNAT
1275                                     && mathed_env != LM_OT_ALIGNATN)
1276                                         os << "%";
1277                                 os << "{" << p->GetColumns()/2 << "}";
1278                         }
1279                         os << "\n";
1280                 }
1281                 ++number_of_newlines;
1282         }
1283
1284         if (!label.empty() && label[0] > ' '
1285             && is_singlely_numbered(mathed_env)) {
1286                 os << "\\label{"
1287                    << label
1288                    << "}\n";
1289                 ++number_of_newlines;
1290         }
1291
1292         p->Write(os, fragile);
1293
1294         if (mathed_env == LM_OT_MIN){
1295                 if (fragile) os << "\\protect";
1296                 os << " \\)";
1297         } else if (mathed_env == LM_OT_PAR) {
1298                 os << "\\]\n";
1299                 ++number_of_newlines;
1300         } else {
1301                 os << "\n\\end{"
1302                    << latex_mathenv[mathed_env]
1303                    << "}\n";
1304                 number_of_newlines += 2;
1305         }
1306         return number_of_newlines;
1307 }