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 namespace {
  68
  69 LyXFont::FONT_SIZE lfont_size = LyXFont::SIZE_NORMAL;
  70
  71 // local global
  72 int sel_x;
  73 int sel_y;
  74 bool sel_flag;
  75
  76 int mathed_write(MathParInset *, std::ostream &, bool fragile,
  77                  string const & label = string());
  78
  79 void mathed_init_fonts();
  80
  81 void mathedValidate(LaTeXFeatures & features, MathParInset * par);
  82
  83 } // namespaces
  84
  85
  86 MathedCursor * InsetFormula::mathcursor = 0;
  87
  88
  89 LyXFont WhichFont(short type, int size)
  90 {
  91         LyXFont f;
  92
  93         if (!Math_Fonts)
  94                 mathed_init_fonts();
  95
  96         switch (type) {
  97         case LM_TC_SYMB:
  98                 f = Math_Fonts[2];
  99                 break;
 100
 101         case LM_TC_BSYM:
 102                 f = Math_Fonts[2];
 103                 break;
 104
 105         case LM_TC_VAR:
 106         case LM_TC_IT:
 107                 f = Math_Fonts[0];
 108                 break;
 109
 110         case LM_TC_BF:
 111                 f = Math_Fonts[3];
 112                 break;
 113
 114         case LM_TC_SF:
 115                 f = Math_Fonts[7];
 116                 break;
 117
 118         case LM_TC_CAL:
 119                 f = Math_Fonts[4];
 120                 break;
 121
 122         case LM_TC_TT:
 123                 f = Math_Fonts[5];
 124                 break;
 125
 126         case LM_TC_SPECIAL: //f = Math_Fonts[0]; break;
 127         case LM_TC_TEXTRM:
 128         case LM_TC_RM:
 129                 f = Math_Fonts[6];
 130                 break;
 131
 132         default:
 133                 f = Math_Fonts[1];
 134                 break;
 135         }
 136
 137         f.setSize(lfont_size);
 138
 139         switch (size) {
 140         case LM_ST_DISPLAY:
 141                 if (type == LM_TC_BSYM) {
 142                         f.incSize();
 143                         f.incSize();
 144                 }
 145                 break;
 146
 147         case LM_ST_TEXT:
 148                 break;
 149
 150         case LM_ST_SCRIPT:
 151                 f.decSize();
 152                 break;
 153
 154         case LM_ST_SCRIPTSCRIPT:
 155                 f.decSize();
 156                 f.decSize();
 157                 break;
 158
 159         default:
 160                 lyxerr << "Mathed Error: wrong font size: " << size << endl;
 161                 break;
 162         }
 163
 164         if (type != LM_TC_TEXTRM)
 165                 f.setColor(LColor::math);
 166
 167         return f;
 168 }
 169
 170
 171 namespace {
 172
 173 void mathed_init_fonts() //removed 'static' because DEC cxx does not
 174 //like it (JMarc)
 175 // Probably because this func is declared as a friend in math_defs.h
 176 // Lgb
 177 {
 178         Math_Fonts = new LyXFont[8]; //DEC cxx cannot initialize all fonts
 179         //at once (JMarc) rc
 180
 181         for (int i = 0 ; i < 8 ; ++i) {
 182                 Math_Fonts[i] = LyXFont(LyXFont::ALL_SANE);
 183         }
 184
 185         Math_Fonts[0].setShape(LyXFont::ITALIC_SHAPE);
 186
 187         Math_Fonts[1].setFamily(LyXFont::SYMBOL_FAMILY);
 188
 189         Math_Fonts[2].setFamily(LyXFont::SYMBOL_FAMILY);
 190         Math_Fonts[2].setShape(LyXFont::ITALIC_SHAPE);
 191
 192         Math_Fonts[3].setSeries(LyXFont::BOLD_SERIES);
 193
 194         Math_Fonts[4].setFamily(LyXFont::SANS_FAMILY);
 195         Math_Fonts[4].setShape(LyXFont::ITALIC_SHAPE);
 196
 197         Math_Fonts[5].setFamily(LyXFont::TYPEWRITER_FAMILY);
 198
 199         Math_Fonts[6].setFamily(LyXFont::ROMAN_FAMILY);
 200
 201         Math_Fonts[7].setFamily(LyXFont::SANS_FAMILY);
 202
 203         LyXFont f = WhichFont(LM_TC_VAR, LM_ST_TEXT);
 204         MathedInset::defaultAscent(lyxfont::maxAscent(f));
 205         MathedInset::defaultDescent(lyxfont::maxDescent(f));
 206         MathedInset::defaultWidth(lyxfont::width('I', f));
 207 }
 208
 209 } // namespace anon
 210
 211
 212 // quite a hack i know. Should be done with return values...
 213 int number_of_newlines = 0;
 214
 215
 216 InsetFormula::InsetFormula(bool display)
 217 {
 218         par = new MathParInset; // this leaks
 219         //  mathcursor = 0;
 220         disp_flag_ = display;
 221         if (disp_flag_) {
 222                 par->SetType(LM_OT_PAR);
 223                 par->SetStyle(LM_ST_DISPLAY);
 224         }
 225 }
 226
 227
 228 InsetFormula::InsetFormula(MathParInset * p)
 229 {
 230         if (is_matrix_type(p->GetType()))
 231                 lyxerr << "InsetFormula::InsetFormula: This shouldn't happen" << endl;
 232
 233         par = is_multiline(p->GetType()) ?
 234                 new MathMatrixInset(*static_cast<MathMatrixInset*>(p)):
 235                 new MathParInset(*p);
 236         //   mathcursor = 0;
 237
 238         disp_flag_ = (par->GetType()>0);
 239 }
 240
 241
 242 InsetFormula::~InsetFormula()
 243 {
 244         delete par;
 245 }
 246
 247
 248 Inset * InsetFormula::Clone(Buffer const &) const
 249 {
 250         InsetFormula * f = new InsetFormula(par);
 251         f->label_ = label_;
 252         return f;
 253 }
 254
 255
 256 void InsetFormula::Write(Buffer const * buf, ostream & os) const
 257 {
 258         os << "Formula ";
 259         Latex(buf, os, false, false);
 260 }
 261
 262
 263 int InsetFormula::Latex(Buffer const *, ostream & os, bool fragile, bool) const
 264 {
 265         //#warning Alejandro, the number of lines is not returned in this case
 266         // This problem will disapear at 0.13.
 267         return mathed_write(par, os, fragile, label_);
 268 }
 269
 270
 271 int InsetFormula::Ascii(Buffer const *, ostream & os, int) const
 272 {
 273         par->Write(os, false);
 274         return 0;
 275 }
 276
 277
 278 int InsetFormula::Linuxdoc(Buffer const * buf, ostream & os) const
 279 {
 280         return Ascii(buf, os, 0);
 281 }
 282
 283
 284 int InsetFormula::DocBook(Buffer const * buf, ostream & os) const
 285 {
 286         return Ascii(buf, os, 0);
 287 }
 288
 289
 290 // Check if uses AMS macros
 291 void InsetFormula::Validate(LaTeXFeatures & features) const
 292 {
 293         if (is_ams(par->GetType()))
 294                 features.amsstyle = true;
 295
 296         // Validation is necessary only if not using AMS math.
 297         // To be safe, we will always run mathedValidate.
 298         //if (!features.amsstyle)
 299         mathedValidate(features, par);
 300 }
 301
 302
 303 void InsetFormula::Read(Buffer const *buffer, LyXLex & lex)
 304 {
 305         istream & is = lex.getStream();
 306
 307         mathed_parser_file(is, lex.GetLineNo());
 308
 309         // Silly hack to read labels.
 310         mathed_label.erase();
 311
 312         MathedArray ar;
 313         mathed_parse(ar, 0, &par);
 314         par->Metrics();
 315         disp_flag_ = (par->GetType() > 0);
 316
 317         // Update line number
 318         lex.setLineNo(mathed_parser_lineno());
 319
 320         if (!mathed_label.empty()) {
 321                 label_ = mathed_label;
 322                 mathed_label.erase();
 323         }
 324
 325         // reading of end_inset in the inset!!!
 326         while (lex.IsOK()) {
 327                 lex.nextToken();
 328                 if (lex.GetString() == "\\end_inset")
 329                         break;
 330                 lyxerr << "InsetFormula::Read: Garbage before \\end_inset,"
 331                         " or missing \\end_inset!" << endl;
 332         }
 333
 334         if (lyxerr.debugging(Debug::MATHED))
 335                 Write(buffer, lyxerr);
 336 }
 337
 338
 339 int InsetFormula::ascent(BufferView *, LyXFont const &) const
 340 {
 341         return par->Ascent() + (disp_flag_ ? 8 : 1);
 342 }
 343
 344
 345 int InsetFormula::descent(BufferView *, LyXFont const &) const
 346 {
 347         return par->Descent() + (disp_flag_ ? 8 : 1);
 348 }
 349
 350
 351 int InsetFormula::width(BufferView * bv, LyXFont const & f) const
 352 {
 353         MathedInset::workWidth = bv->workWidth();
 354         lfont_size = f.size();
 355         par->Metrics();
 356         return par->Width(); //+2;
 357 }
 358
 359
 360 void InsetFormula::draw(BufferView * bv, LyXFont const & f,
 361                         int baseline, float & x, bool) const
 362 {
 363         MathedInset::workWidth = bv->workWidth();
 364         Painter & pain = bv->painter();
 365         // Seems commenting out solves a problem.
 366         LyXFont font = mathed_get_font(LM_TC_TEXTRM, LM_ST_TEXT);
 367         font.setSize(f.size());
 368         lfont_size = font.size();
 369         /// Let's try to wait a bit with this... (Lgb)
 370         //UpdatableInset::draw(pain, font, baseline, x);
 371
 372         // otherwise a segfault could occur
 373         // in some XDrawRectangles (i.e. matrix) (Matthias)
 374         if (mathcursor && mathcursor->GetPar() == par) {
 375                 if (mathcursor->Selection()) {
 376                         int n;
 377                         int * xp = 0;
 378                         int * yp = 0;
 379                         mathcursor->SelGetArea(&xp, &yp, n);
 380                         pain.fillPolygon(xp, yp, n, LColor::selection);
 381                 }
 382                 mathcursor->draw(pain, int(x), baseline);
 383         } else {
 384                 par->draw(pain, int(x), baseline);
 385         }
 386         x += float(width(bv, font));
 387
 388         if (is_numbered(par->GetType())) {
 389                 LyXFont wfont = WhichFont(LM_TC_BF, par->size());
 390                 wfont.setLatex(LyXFont::OFF);
 391
 392                 if (is_singlely_numbered(par->GetType())) {
 393                         string str;
 394                         if (!label_.empty())
 395                                 str = string("(") + label_ + ")";
 396                         else
 397                                 str = string("(#)");
 398                         pain.text(int(x + 20), baseline, str, wfont);
 399                 } else {
 400                         MathMatrixInset * mt =
 401                                 static_cast<MathMatrixInset*>(par);
 402                         MathedRowContainer::iterator crow = mt->getRowSt().begin();
 403                         while (crow) {
 404                                 int const y = baseline + crow->getBaseline();
 405                                 if (crow->isNumbered()) {
 406                                         string str;
 407                                         if (!crow->getLabel().empty())
 408                                                 str = string("(") + crow->getLabel() + ")";
 409                                         else
 410                                                 str = "(#)";
 411                                         pain.text(int(x + 20), y, str, wfont);
 412                                 }
 413                                 ++crow;
 414                         }
 415                 }
 416         }
 417         cursor_visible = false;
 418 }
 419
 420
 421 string const InsetFormula::EditMessage() const
 422 {
 423         return _("Math editor mode");
 424 }
 425
 426
 427 void InsetFormula::Edit(BufferView * bv, int x, int y, unsigned int)
 428 {
 429         mathcursor = new MathedCursor(par);
 430
 431         if (!bv->lockInset(this))
 432                 lyxerr[Debug::MATHED] << "Cannot lock inset!!!" << endl;
 433
 434         par->Metrics();
 435         bv->updateInset(this, false);
 436         x += par->xo();
 437         y += par->yo();
 438         mathcursor->SetPos(x, y);
 439         sel_x = 0;
 440         sel_y = 0;
 441         sel_flag = false;
 442 }
 443
 444
 445 void InsetFormula::InsetUnlock(BufferView * bv)
 446 {
 447         if (mathcursor) {
 448                 if (mathcursor->InMacroMode()) {
 449                         mathcursor->MacroModeClose();
 450                         UpdateLocal(bv);
 451                 }
 452                 delete mathcursor;
 453         }
 454         mathcursor = 0;
 455         bv->updateInset(this, false);
 456 }
 457
 458
 459 // Now a symbol can be inserted only if the inset is locked
 460 void InsetFormula::InsertSymbol(BufferView * bv, string const & s)
 461 {
 462         if (s.empty() || !mathcursor)
 463                 return;
 464         mathcursor->Interpret(s);
 465         UpdateLocal(bv);
 466 }
 467
 468
 469 void InsetFormula::GetCursorPos(BufferView *, int & x, int & y) const
 470 {
 471         mathcursor->GetPos(x, y);
 472         x -= par->xo();
 473         y -= par->yo();
 474 }
 475
 476
 477 void InsetFormula::ToggleInsetCursor(BufferView * bv)
 478 {
 479         if (!mathcursor)
 480                 return;
 481
 482         int x;
 483         int y;
 484         mathcursor->GetPos(x, y);
 485         //  x -= par->xo;
 486         y -= par->yo();
 487         LyXFont font = WhichFont(LM_TC_TEXTRM, LM_ST_TEXT);
 488         int asc = lyxfont::maxAscent(font);
 489         int desc = lyxfont::maxDescent(font);
 490
 491         if (cursor_visible)
 492                 bv->hideLockedInsetCursor();
 493         else
 494                 bv->showLockedInsetCursor(x, y, asc, desc);
 495
 496         cursor_visible = !cursor_visible;
 497 }
 498
 499
 500 void InsetFormula::ShowInsetCursor(BufferView * bv, bool)
 501 {
 502         if (!cursor_visible) {
 503                 if (mathcursor) {
 504                         int x;
 505                         int y;
 506                         mathcursor->GetPos(x, y);
 507                         //  x -= par->xo;
 508                         y -= par->yo();
 509                         LyXFont font = WhichFont(LM_TC_TEXTRM, LM_ST_TEXT);
 510                         int asc = lyxfont::maxAscent(font);
 511                         int desc = lyxfont::maxDescent(font);
 512                         bv->fitLockedInsetCursor(x, y, asc, desc);
 513                 }
 514                 ToggleInsetCursor(bv);
 515         }
 516 }
 517
 518
 519 void InsetFormula::HideInsetCursor(BufferView * bv)
 520 {
 521         if (cursor_visible)
 522                 ToggleInsetCursor(bv);
 523 }
 524
 525
 526 void InsetFormula::ToggleInsetSelection(BufferView * bv)
 527 {
 528         if (!mathcursor)
 529                 return;
 530
 531         bv->updateInset(this, false);
 532 }
 533
 534
 535 void InsetFormula::display(bool dspf)
 536 {
 537         if (dspf != disp_flag_) {
 538                 if (dspf) {
 539                         par->SetType(LM_OT_PAR);
 540                         par->SetStyle(LM_ST_DISPLAY);
 541                 } else {
 542                         if (is_multiline(par->GetType())) {
 543                                 if (mathcursor)
 544                                         mathcursor->SetPar(par);
 545                         }
 546                         par->SetType(LM_OT_MIN);
 547                         par->SetStyle(LM_ST_TEXT);
 548                         if (!label_.empty()) {
 549                                 label_.erase();
 550                         }
 551                 }
 552                 disp_flag_ = dspf;
 553         }
 554 }
 555
 556
 557 vector<string> const InsetFormula::getLabelList() const
 558 {
 559         //#warning This is dirty, I know. Ill clean it at 0.11
 560         // Correction, the only way to clean this is with a new kernel: 0.13.
 561
 562         vector<string> label_list;
 563
 564         if (is_multi_numbered(par->GetType())) {
 565                 MathMatrixInset * mt = static_cast<MathMatrixInset*>(par);
 566                 MathedRowContainer::iterator crow = mt->getRowSt().begin();
 567                 while (crow) {
 568                         if (!crow->getLabel().empty())
 569                                 label_list.push_back(crow->getLabel());
 570                         ++crow;
 571                 }
 572         } else if (!label_.empty())
 573                 label_list.push_back(label_);
 574
 575         return label_list;
 576 }
 577
 578
 579 void InsetFormula::UpdateLocal(BufferView * bv)
 580 {
 581         par->Metrics();  // To inform lyx kernel the exact size
 582         // (there were problems with arrays).
 583         bv->updateInset(this, true);
 584 }
 585
 586
 587 void InsetFormula::InsetButtonRelease(BufferView * bv,
 588                                       int x, int y, int /*button*/)
 589 {
 590         if (mathcursor) {
 591                 HideInsetCursor(bv);
 592                 x += par->xo();
 593                 y += par->yo();
 594                 mathcursor->SetPos(x, y);
 595                 ShowInsetCursor(bv);
 596                 if (sel_flag) {
 597                         sel_flag = false;
 598                         sel_x = sel_y = 0;
 599                         bv->updateInset(this, false);
 600                 }
 601         }
 602 }
 603
 604
 605 void InsetFormula::InsetButtonPress(BufferView * bv, int x, int y,
 606                                     int /*button*/)
 607 {
 608         sel_flag = false;
 609         sel_x = x;
 610         sel_y = y;
 611         if (mathcursor && mathcursor->Selection()) {
 612                 mathcursor->SelClear();
 613                 bv->updateInset(this, false);
 614         }
 615 }
 616
 617
 618 void InsetFormula::InsetMotionNotify(BufferView * bv,
 619                                      int x, int y, int /*button*/)
 620 {
 621         if (sel_x && sel_y && abs(x-sel_x) > 4 && !sel_flag) {
 622                 sel_flag = true;
 623                 HideInsetCursor(bv);
 624                 mathcursor->SetPos(sel_x + par->xo(), sel_y + par->yo());
 625                 mathcursor->SelStart();
 626                 ShowInsetCursor(bv);
 627                 mathcursor->GetPos(sel_x, sel_y);
 628         } else if (sel_flag) {
 629                 HideInsetCursor(bv);
 630                 x += par->xo();
 631                 y += par->yo();
 632                 mathcursor->SetPos(x, y);
 633                 ShowInsetCursor(bv);
 634                 mathcursor->GetPos(x, y);
 635                 if (sel_x != x || sel_y != y)
 636                         bv->updateInset(this, false);
 637                 sel_x = x;
 638                 sel_y = y;
 639         }
 640 }
 641
 642
 643 void InsetFormula::InsetKeyPress(XKeyEvent *)
 644 {
 645         lyxerr[Debug::MATHED] << "Used InsetFormula::InsetKeyPress." << endl;
 646 }
 647
 648
 649 // Special Mathed functions
 650 bool InsetFormula::SetNumber(bool numbf)
 651 {
 652         if (disp_flag_) {
 653                 short type = par->GetType();
 654                 bool const oldf = is_numbered(type);
 655                 if (numbf && !oldf)
 656                         ++type;
 657                 if (!numbf && oldf)
 658                         --type;
 659                 par->SetType(type);
 660                 return oldf;
 661         } else
 662                 return false;
 663 }
 664
 665
 666 UpdatableInset::RESULT
 667 InsetFormula::LocalDispatch(BufferView * bv, kb_action action,
 668                             string const & arg)
 669 {
 670         //   extern char *dispatch_result;
 671         MathedTextCodes varcode = LM_TC_MIN;
 672         bool was_macro = mathcursor->InMacroMode();
 673         bool sel = false;
 674         bool space_on = false;
 675         bool was_selection = mathcursor->Selection();
 676         RESULT result = DISPATCHED;
 677         static MathSpaceInset * sp= 0;
 678
 679         HideInsetCursor(bv);
 680
 681         if (mathcursor->getLastCode() == LM_TC_TEX) {
 682                 varcode = LM_TC_TEX;
 683         }
 684
 685         switch (action) {
 686                 // --- Cursor Movements ---------------------------------------------
 687         case LFUN_RIGHTSEL:
 688                 sel = true; // fall through...
 689
 690         case LFUN_RIGHT:
 691                 result = DISPATCH_RESULT(mathcursor->Right(sel));
 692                 if (!sel && (result == DISPATCHED))
 693                         result = DISPATCHED_NOUPDATE;
 694                 break;
 695
 696
 697         case LFUN_LEFTSEL:
 698                 sel = true; // fall through
 699
 700         case LFUN_LEFT:
 701                 result = DISPATCH_RESULT(mathcursor->Left(sel));
 702                 if (!sel && (result == DISPATCHED))
 703                         result = DISPATCHED_NOUPDATE;
 704                 break;
 705
 706
 707         case LFUN_UPSEL:
 708                 sel = true;
 709
 710         case LFUN_UP:
 711                 result = DISPATCH_RESULT(mathcursor->Up(sel));
 712                 if (!sel && (result == DISPATCHED))
 713                         result = DISPATCHED_NOUPDATE;
 714                 break;
 715
 716
 717         case LFUN_DOWNSEL:
 718                 sel = true;
 719
 720         case LFUN_DOWN:
 721                 result = DISPATCH_RESULT(mathcursor->Down(sel));
 722                 if (!sel && (result == DISPATCHED))
 723                         result = DISPATCHED_NOUPDATE;
 724                 break;
 725
 726
 727         case LFUN_HOME:
 728                 mathcursor->Home();
 729                 result = DISPATCHED_NOUPDATE;
 730                 break;
 731
 732         case LFUN_END:
 733                 mathcursor->End();
 734                 result = DISPATCHED_NOUPDATE;
 735                 break;
 736
 737         case LFUN_DELETE_LINE_FORWARD:
 738                 bv->lockedInsetStoreUndo(Undo::DELETE);
 739                 mathcursor->DelLine();
 740                 UpdateLocal(bv);
 741                 break;
 742
 743         case LFUN_BREAKLINE:
 744         {
 745                 bv->lockedInsetStoreUndo(Undo::INSERT);
 746                 byte c = arg.empty() ? '1' : arg[0];
 747                 mathcursor->Insert(c, LM_TC_CR);
 748                 if (!label_.empty()) {
 749                         mathcursor->setLabel(label_);
 750                         label_.erase();
 751                 }
 752                 par = mathcursor->GetPar();
 753                 UpdateLocal(bv);
 754         }
 755         break;
 756
 757         case LFUN_TAB:
 758                 bv->lockedInsetStoreUndo(Undo::INSERT);
 759                 mathcursor->Insert(0, LM_TC_TAB);
 760                 //UpdateInset(this);
 761                 break;
 762
 763         case LFUN_TABINSERT:
 764                 bv->lockedInsetStoreUndo(Undo::INSERT);
 765                 mathcursor->Insert('T', LM_TC_TAB);
 766                 UpdateLocal(bv);
 767                 break;
 768
 769         case LFUN_BACKSPACE:
 770                 if (!mathcursor->Left())
 771                         break;
 772
 773                 if (!mathcursor->InMacroMode() && mathcursor->pullArg()) {
 774                         bv->updateInset(this, true);
 775                         break;
 776                 }
 777                 // fall through...
 778
 779         case LFUN_DELETE:
 780                 bv->lockedInsetStoreUndo(Undo::DELETE);
 781                 mathcursor->Delete();
 782                 bv->updateInset(this, true);
 783                 break;
 784
 785                 //    case LFUN_GETXY:
 786                 //      sprintf(dispatch_buffer, "%d %d",);
 787                 //      dispatch_result = dispatch_buffer;
 788                 //      break;
 789         case LFUN_SETXY:
 790         {
 791                 int x;
 792                 int y;
 793                 int x1;
 794                 int y1;
 795                 istringstream ist(arg.c_str());
 796                 ist >> x >> y;
 797                 par->GetXY(x1, y1);
 798                 mathcursor->SetPos(x1 + x, y1 + y);
 799         }
 800         break;
 801
 802                 /* cursor selection ---------------------------- */
 803
 804         case LFUN_PASTE:
 805                 if (was_macro)
 806                         mathcursor->MacroModeClose();
 807                 bv->lockedInsetStoreUndo(Undo::INSERT);
 808                 mathcursor->SelPaste();
 809                 UpdateLocal(bv);
 810                 break;
 811
 812         case LFUN_CUT:
 813                 bv->lockedInsetStoreUndo(Undo::DELETE);
 814                 mathcursor->SelCut();
 815                 UpdateLocal(bv);
 816                 break;
 817
 818         case LFUN_COPY:
 819                 mathcursor->SelCopy();
 820                 break;
 821
 822         case LFUN_HOMESEL:
 823         case LFUN_ENDSEL:
 824         case LFUN_WORDRIGHTSEL:
 825         case LFUN_WORDLEFTSEL:
 826                 break;
 827
 828                 // --- accented characters ------------------------------
 829
 830         case LFUN_UMLAUT:     mathcursor->setAccent(LM_ddot); break;
 831         case LFUN_CIRCUMFLEX: mathcursor->setAccent(LM_hat); break;
 832         case LFUN_GRAVE:      mathcursor->setAccent(LM_grave); break;
 833         case LFUN_ACUTE:      mathcursor->setAccent(LM_acute); break;
 834         case LFUN_TILDE:      mathcursor->setAccent(LM_tilde); break;
 835         case LFUN_MACRON:     mathcursor->setAccent(LM_bar); break;
 836         case LFUN_DOT:        mathcursor->setAccent(LM_dot); break;
 837         case LFUN_CARON:      mathcursor->setAccent(LM_check); break;
 838         case LFUN_BREVE:      mathcursor->setAccent(LM_breve); break;
 839         case LFUN_VECTOR:     mathcursor->setAccent(LM_vec); break;
 840
 841                 // Greek mode
 842         case LFUN_GREEK:
 843                 if (!greek_kb_flag) {
 844                         greek_kb_flag = 1;
 845                         bv->owner()->getMiniBuffer()->Set(_("Math greek mode on"));
 846                 } else
 847                         greek_kb_flag = 0;
 848                 break;
 849
 850                 // Greek keyboard
 851         case LFUN_GREEK_TOGGLE:
 852                 greek_kb_flag = (greek_kb_flag) ? 0 : 2;
 853                 if (greek_kb_flag)
 854                         bv->owner()->getMiniBuffer()->Set(_("Math greek keyboard on"));
 855                 else
 856                         bv->owner()->getMiniBuffer()->Set(_("Math greek keyboard off"));
 857                 break;
 858
 859                 //  Math fonts
 860         case LFUN_BOLD:  mathcursor->toggleLastCode(LM_TC_BF); break;
 861         case LFUN_SANS:  mathcursor->toggleLastCode(LM_TC_SF); break;
 862         case LFUN_EMPH:  mathcursor->toggleLastCode(LM_TC_CAL); break;
 863         case LFUN_ROMAN: mathcursor->toggleLastCode(LM_TC_RM); break;
 864         case LFUN_CODE:  mathcursor->toggleLastCode(LM_TC_TT); break;
 865         case LFUN_DEFAULT:  mathcursor->setLastCode(LM_TC_VAR); break;
 866
 867         case LFUN_TEX:
 868                 // varcode = LM_TC_TEX;
 869                 mathcursor->setLastCode(LM_TC_TEX);
 870                 bv->owner()->getMiniBuffer()->Set(_("TeX mode"));
 871                 break;
 872
 873         case LFUN_MATH_NUMBER:
 874                 bv->lockedInsetStoreUndo(Undo::INSERT);
 875                 if (disp_flag_) {
 876                         short type = par->GetType();
 877                         if (is_numbered(type)) {
 878                                 --type;
 879                                 if (!label_.empty()) {
 880                                         label_.erase();
 881                                 }
 882                                 bv->owner()->getMiniBuffer()->Set(_("No number"));
 883                         } else {
 884                                 ++type;
 885                                 bv->owner()->getMiniBuffer()->Set(_("Number"));
 886                         }
 887                         par->SetType(type);
 888                         UpdateLocal(bv);
 889                 }
 890                 break;
 891
 892         case LFUN_MATH_NONUMBER:
 893                 if (is_multi_numbered(par->GetType())) {
 894                                 //         MathMatrixInset *mt = (MathMatrixInset*)par;
 895                                 //BUG
 896                                 //         mt->SetNumbered(!mt->IsNumbered());
 897
 898 #warning This is a terrible hack! We should find a better solution.
 899                         while (mathcursor->getLabel() == MathedXIter::error_label) {
 900                                 if (LocalDispatch(bv, LFUN_LEFT, string()) == FINISHED)
 901                                         return DISPATCHED;
 902                         }
 903                         mathcursor->setNumbered();
 904                         UpdateLocal(bv);
 905                 }
 906                 break;
 907
 908         case LFUN_MATH_LIMITS:
 909                 bv->lockedInsetStoreUndo(Undo::INSERT);
 910                 if (mathcursor->Limits())
 911                         UpdateLocal(bv);
 912                 // fall through!
 913
 914         case LFUN_MATH_SIZE:
 915                 if (!arg.empty()) {
 916                         latexkeys const * l = in_word_set(arg);
 917                         int const sz = (l) ? l->id: -1;
 918                         mathcursor->SetSize(sz);
 919                         UpdateLocal(bv);
 920                         break;
 921                 }
 922                 // possible fall through?
 923
 924         case LFUN_INSERT_MATH:
 925                 bv->lockedInsetStoreUndo(Undo::INSERT);
 926                 InsertSymbol(bv, arg);
 927                 break;
 928
 929
 930         case LFUN_INSERT_MATRIX:
 931         {
 932                 bv->lockedInsetStoreUndo(Undo::INSERT);
 933                 char s[80];
 934                 char arg2[80];
 935                 // This is just so that too long args won't ooze out of s.
 936                 strncpy(arg2, arg.c_str(), 80);
 937                 arg2[79]= '\0';
 938                 int m;
 939                 int n;
 940                 int const k = sscanf(arg2, "%d %d %s", &m, &n, s);
 941                 s[79] = '\0';
 942
 943                 if (k < 1) {
 944                         m = n = 1;
 945                 } else if (k == 1) {
 946                         n = 1;
 947                 }
 948
 949                 MathMatrixInset * p = new MathMatrixInset(m, n);
 950                 if (mathcursor && p) {
 951                         if (k > 2 && int(strlen(s)) > m)
 952                                 p->SetAlign(s[0], &s[1]);
 953                         mathcursor->insertInset(p, LM_TC_ACTIVE_INSET);
 954                         UpdateLocal(bv);
 955                 }
 956                 break;
 957         }
 958
 959         case LFUN_MATH_DELIM:
 960         {
 961                 bv->lockedInsetStoreUndo(Undo::INSERT);
 962                 char lf[40];
 963                 char rg[40];
 964                 char arg2[40];
 965                 int ilf = '(';
 966                 int irg = '.';
 967                 latexkeys const * l;
 968                 string vdelim("(){}[]./|");
 969
 970                 if (arg.empty())
 971                         break;
 972                 ::strncpy(arg2, arg.c_str(), 40);
 973                 arg2[39]= '\0';
 974                 int const n = sscanf(arg2, "%s %s", lf, rg);
 975                 lf[39] = '\0';
 976                 rg[39] = '\0';
 977
 978                 if (n > 0) {
 979                         if (isdigit(lf[0]))
 980                                 ilf = lyx::atoi(lf);
 981                         else
 982                                 if (lf[1]) {
 983                                         l = in_word_set(lf, strlen(lf));
 984                                         // Long words will cause l == 0; so check.
 985                                         if (l)
 986                                                 ilf = l->id;
 987                                 } else if (vdelim.find(lf[0]) != string::npos)
 988                                         ilf = lf[0];
 989
 990                         if (n > 1) {
 991                                 if (isdigit(rg[0]))
 992                                         irg = lyx::atoi(rg);
 993                                 else
 994                                         if (rg[1]) {
 995                                                 l = in_word_set(rg, strlen(rg));
 996                                                 if (l)
 997                                                         irg = l->id;
 998                                         } else if (vdelim.find(rg[0]) != string::npos)
 999                                                 irg = rg[0];
1000                         }
1001                 }
1002
1003                 MathDelimInset * p = new MathDelimInset(ilf, irg);
1004                 mathcursor->insertInset(p, LM_TC_ACTIVE_INSET);
1005                 UpdateLocal(bv);
1006                 break;
1007         }
1008
1009         case LFUN_PROTECTEDSPACE:
1010                 bv->lockedInsetStoreUndo(Undo::INSERT);
1011                 sp = new MathSpaceInset(1);
1012                 mathcursor->insertInset(sp, LM_TC_INSET);
1013                 space_on = true;
1014                 UpdateLocal(bv);
1015                 break;
1016
1017         case LFUN_INSERT_LABEL:
1018         {
1019                 bv->lockedInsetStoreUndo(Undo::INSERT);
1020                 if (par->GetType() < LM_OT_PAR)
1021                         break;
1022
1023                 string old_label = is_multiline(par->GetType())
1024                         ? mathcursor->getLabel() : label_;
1025
1026 #warning This is a terrible hack! We should find a better solution.
1027                 // This is needed because in some positions
1028                 // mathcursor->cursor->crow is equal to 0, and therefore
1029                 // the label cannot be inserted.
1030                 // So we move the cursor left until
1031                 // mathcursor->cursor->crow != 0.
1032                 while (old_label == MathedXIter::error_label) {
1033                         if (LocalDispatch(bv, LFUN_LEFT, string()) == FINISHED)
1034                                 return DISPATCHED;
1035                         old_label = mathcursor->getLabel();
1036                 }
1037
1038                 string new_label = arg;
1039                 if (new_label.empty()) {
1040                         string default_label = (lyxrc.label_init_length >= 0) ? "eq:" : "";
1041                         pair<bool, string> res = old_label.empty()
1042                                 ? askForText(_("Enter new label to insert:"), default_label)
1043                                 : askForText(_("Enter label:"), old_label);
1044                         if (!res.first)
1045                                 break;
1046                         new_label = frontStrip(strip(res.second));
1047                 }
1048
1049                 if (new_label == old_label)
1050                         break;  // Nothing to do
1051
1052                 if (!new_label.empty())
1053                         SetNumber(true);
1054
1055                 if (!new_label.empty() && bv->ChangeRefsIfUnique(old_label, new_label))
1056                         bv->redraw();
1057
1058                 if (is_multi_numbered(par->GetType())) {
1059                         mathcursor->setLabel(new_label);
1060                         // MathMatrixInset *mt = (MathMatrixInset*)par;
1061                         // mt->SetLabel(new_label);
1062                 } else
1063                         label_ = new_label;
1064
1065                 UpdateLocal(bv);
1066                 break;
1067         }
1068
1069         case LFUN_MATH_DISPLAY:
1070                 bv->lockedInsetStoreUndo(Undo::EDIT);
1071                 display(!disp_flag_);
1072                 UpdateLocal(bv);
1073                 break;
1074
1075                 // Invalid actions under math mode
1076         case LFUN_MATH_MODE:
1077                 if (mathcursor->getLastCode()!= LM_TC_TEXTRM) {
1078                         bv->owner()->getMiniBuffer()->Set(_("math text mode"));
1079                         varcode = LM_TC_TEXTRM;
1080                 } else {
1081                         varcode = LM_TC_VAR;
1082                 }
1083                 mathcursor->setLastCode(varcode);
1084                 break;
1085
1086         case LFUN_UNDO:
1087                 bv->owner()->getMiniBuffer()->Set(_("Invalid action in math mode!"));
1088                 break;
1089
1090                 //------- dummy actions
1091         case LFUN_EXEC_COMMAND:
1092                 bv->owner()->getMiniBuffer()->PrepareForCommand();
1093                 break;
1094
1095         default:
1096                 if ((action == -1  || action == LFUN_SELFINSERT) && !arg.empty())  {
1097                         unsigned char c = arg[0];
1098                         bv->lockedInsetStoreUndo(Undo::INSERT);
1099
1100                         if (c == ' ' && mathcursor->getAccent() == LM_hat) {
1101                                 c = '^';
1102                                 mathcursor->setAccent(0);
1103                         }
1104
1105                         if (c == 0) {      // Dead key, do nothing
1106                                 //lyxerr << "deadkey" << endl;
1107                                 break;
1108                         }
1109
1110                         if (isalpha(c)) {
1111                                 if (mathcursor->getLastCode() == LM_TC_TEX) {
1112                                         mathcursor->MacroModeOpen();
1113                                         mathcursor->clearLastCode();
1114                                         varcode = LM_TC_MIN;
1115                                 } else if (!varcode) {
1116                                         short f = (mathcursor->getLastCode()) ?
1117                                                 mathcursor->getLastCode() :
1118                                                 static_cast<MathedTextCodes>(mathcursor->GetFCode());
1119                                         varcode = MathIsAlphaFont(f) ?
1120                                                 static_cast<MathedTextCodes>(f) :
1121                                                 LM_TC_VAR;
1122                                 }
1123
1124                                 //           lyxerr << "Varcode << vardoce;
1125                                 MathedTextCodes char_code = varcode;
1126                                 if (greek_kb_flag) {
1127                                         char greek[26] =
1128                                         {'A', 'B', 'X',  0 , 'E',  0 ,  0 , 'H', 'I',  0 ,
1129                                          'K',  0 , 'M', 'N', 'O',  0 ,  0 , 'P',  0 , 'T',
1130                                          'Y',  0,   0,   0,   0 , 'Z' };
1131
1132                                         if ('A' <= c && c <= 'Z' && greek[c - 'A']) {
1133                                                 char_code = LM_TC_RM;
1134                                                 c = greek[c - 'A'];
1135                                         } else
1136                                                 char_code = LM_TC_SYMB;
1137                                 }
1138
1139                                 mathcursor->Insert(c, char_code);
1140
1141                                 if (greek_kb_flag && char_code == LM_TC_RM )
1142                                         mathcursor->setLastCode(LM_TC_VAR);
1143
1144                                 varcode = LM_TC_MIN;
1145
1146                                 if (greek_kb_flag < 2)
1147                                         greek_kb_flag = 0;
1148
1149                         } else if (strchr("!,:;{}", c) && (varcode == LM_TC_TEX||was_macro)) {
1150                                 mathcursor->Insert(c, LM_TC_TEX);
1151                                 if (c == '{') {
1152                                         mathcursor->Insert('}', LM_TC_TEX);
1153                                         mathcursor->Left();
1154                                 }
1155                                 mathcursor->clearLastCode();
1156                                 //             varcode = LM_TC_MIN;
1157                         } else if (c == '_' && varcode == LM_TC_TEX) {
1158                                 mathcursor->Insert(c, LM_TC_SPECIAL);
1159                                 mathcursor->clearLastCode();
1160                                 //             varcode = LM_TC_MIN;
1161                         } else if (('0'<= c && c<= '9') && (varcode == LM_TC_TEX||was_macro)) {
1162                                 mathcursor->MacroModeOpen();
1163                                 mathcursor->clearLastCode();
1164                                 mathcursor->Insert(c, LM_TC_MIN);
1165                         } else if (('0'<= c && c<= '9') || strchr(";:!|[]().,?", c)) {
1166                                 mathcursor->Insert(c, LM_TC_CONST);
1167                         } else if (strchr("+/-*<>=", c)) {
1168                                 mathcursor->Insert(c, LM_TC_BOP);
1169                         } else if (strchr(latex_special_chars, c) && c!= '_') {
1170                                 mathcursor->Insert(c, LM_TC_SPECIAL);
1171                         } else if (c == '_' || c == '^') {
1172                                 char s[2];
1173                                 s[0] = c;
1174                                 s[1] = 0;
1175                                 mathcursor->Interpret(s);
1176                         } else if (c == ' ') {
1177                                 if (!varcode) {
1178                                         short f = (mathcursor->getLastCode()) ?
1179                                                 mathcursor->getLastCode() :
1180                                                 static_cast<MathedTextCodes>(mathcursor->GetFCode());
1181                                         varcode = MathIsAlphaFont(f) ?
1182                                                 static_cast<MathedTextCodes>(f) :
1183                                                 LM_TC_VAR;
1184                                 }
1185
1186                                 if (varcode == LM_TC_TEXTRM) {
1187                                         mathcursor->Insert(c, LM_TC_TEXTRM);
1188                                 } else if (was_macro) {
1189                                         mathcursor->MacroModeClose();
1190                                 } else if (sp) {
1191                                         int isp = (sp->GetSpace()<5) ? sp->GetSpace()+1: 0;
1192                                         sp->SetSpace(isp);
1193                                         space_on = true;
1194                                 } else if (!mathcursor->Pop() && mathcursor->IsEnd())
1195                                         result = FINISHED;
1196                         } else if (c == '\'' || c == '@') {
1197                                 mathcursor->Insert (c, LM_TC_VAR);
1198                         } else if (c == '\\') {
1199                                 if (was_macro)
1200                                         mathcursor->MacroModeClose();
1201                                 bv->owner()->getMiniBuffer()->Set(_("TeX mode"));
1202                                 mathcursor->setLastCode(LM_TC_TEX);
1203                         }
1204                         UpdateLocal(bv);
1205                 } else if (action == LFUN_MATH_PANEL) {
1206                         result = UNDISPATCHED;
1207                 } else {
1208                         // lyxerr << "Closed by action " << action << endl;
1209                         result =  FINISHED;
1210                 }
1211         }
1212
1213         if (was_macro != mathcursor->InMacroMode()
1214             && action >= 0
1215             && action != LFUN_BACKSPACE)
1216                 UpdateLocal(bv);
1217
1218         if (sp && !space_on)
1219                 sp = 0;
1220
1221         if (mathcursor->Selection() || was_selection)
1222                 ToggleInsetSelection(bv);
1223
1224         if ((result == DISPATCHED) || (result == DISPATCHED_NOUPDATE) ||
1225             (result == UNDISPATCHED))
1226                 ShowInsetCursor(bv);
1227         else
1228                 bv->unlockInset(this);
1229
1230         return result;
1231 }
1232
1233
1234 namespace {
1235
1236 void mathedValidate(LaTeXFeatures & features, MathParInset * par)
1237 {
1238         MathedIter it(&par->GetData());
1239
1240         while (it.OK() && !(features.binom && features.boldsymbol)) {
1241                 if (it.IsInset()) {
1242                         if (it.IsActive()) {
1243                                 MathParInset * p = it.GetActiveInset();
1244                                 if (!features.binom && p->GetType() == LM_OT_MACRO &&
1245                                     p->GetName() == "binom") {
1246                                         features.binom = true;
1247                                 } else {
1248                                         for (int i = 0; i <= p->getMaxArgumentIdx(); ++i) {
1249                                                 p->setArgumentIdx(i);
1250                                                 mathedValidate(features, p);
1251                                         }
1252                                 }
1253                         } else {
1254                                 MathedInset * p = it.GetInset();
1255                                 if (!features.boldsymbol && p->GetName() == "boldsymbol") {
1256                                         features.boldsymbol = true;
1257                                 }
1258                         }
1259                 }
1260                 it.Next();
1261         }
1262 }
1263
1264
1265 int mathed_write(MathParInset * p, ostream & os,
1266                  bool fragile, string const & label)
1267 {
1268         number_of_newlines = 0;
1269         short mathed_env = p->GetType();
1270
1271         if (mathed_env == LM_OT_MIN) {
1272                 if (fragile) os << "\\protect";
1273                 os << "\\( "; // changed from " \\( " (Albrecht Dress)
1274         } else {
1275                 if (mathed_env == LM_OT_PAR){
1276                         os << "\\[\n";
1277                 } else {
1278                         os << "\\begin{"
1279                            << latex_mathenv[mathed_env]
1280                            << "}";
1281                         if (is_multicolumn(mathed_env)) {
1282                                 if (mathed_env != LM_OT_ALIGNAT
1283                                     && mathed_env != LM_OT_ALIGNATN)
1284                                         os << "%";
1285                                 os << "{" << p->GetColumns()/2 << "}";
1286                         }
1287                         os << "\n";
1288                 }
1289                 ++number_of_newlines;
1290         }
1291
1292         if (!label.empty() && label[0] > ' '
1293             && is_singlely_numbered(mathed_env)) {
1294                 os << "\\label{"
1295                    << label
1296                    << "}\n";
1297                 ++number_of_newlines;
1298         }
1299
1300         p->Write(os, fragile);
1301
1302         if (mathed_env == LM_OT_MIN){
1303                 if (fragile) os << "\\protect";
1304                 os << " \\)";
1305         } else if (mathed_env == LM_OT_PAR) {
1306                 os << "\\]\n";
1307                 ++number_of_newlines;
1308         } else {
1309                 os << "\n\\end{"
1310                    << latex_mathenv[mathed_env]
1311                    << "}\n";
1312                 number_of_newlines += 2;
1313         }
1314         return number_of_newlines;
1315 }
1316
1317 } // namespace anon
1318
1319
1320 /* FIXME: math-greek-toggle seems to work OK, but math-greek doesn't turn
1321  * on greek mode */
1322 bool math_insert_greek(BufferView * bv, char c)
1323 {
1324         if (bv->available() &&
1325             (('A' <= c && c <= 'Z') ||
1326              ('a'<= c && c<= 'z')))   {
1327                 string tmp;
1328                 tmp = c;
1329                 if (!bv->theLockingInset() || bv->theLockingInset()->IsTextInset()) {
1330                         int greek_kb_flag_save = greek_kb_flag;
1331                         InsetFormula * new_inset = new InsetFormula();
1332                         bv->beforeChange(bv->text);
1333                         if (!bv->insertInset(new_inset)) {
1334                                 delete new_inset;
1335                                 return false;
1336                         }
1337 //       Update(1);//BUG
1338                         new_inset->Edit(bv, 0, 0, 0);
1339                         new_inset->LocalDispatch(bv, LFUN_SELFINSERT, tmp);
1340                         if (greek_kb_flag_save < 2) {
1341                                 bv->unlockInset(new_inset); // bv->theLockingInset());
1342                                 bv->text->CursorRight(bv, true);
1343                         }
1344                 } else
1345                         if (bv->theLockingInset()->LyxCode() == Inset::MATH_CODE ||
1346                             bv->theLockingInset()->LyxCode() == Inset::MATHMACRO_CODE)
1347                                 static_cast<InsetFormula*>(bv->theLockingInset())->LocalDispatch(bv, LFUN_SELFINSERT, tmp);
1348                         else
1349                                 lyxerr << "Math error: attempt to write on a wrong "
1350                                         "class of inset." << endl;
1351                 return true;
1352         }
1353         return false;
1354 }