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         mathed_parse(0, 0, &par);
 309         par->Metrics();
 310         disp_flag = (par->GetType() > 0);
 311
 312         // Update line number
 313         lex.setLineNo(mathed_parser_lineno());
 314
 315         if (!mathed_label.empty()) {
 316                 label = mathed_label;
 317                 mathed_label.erase();
 318         }
 319
 320         // reading of end_inset in the inset!!!
 321         while (lex.IsOK()) {
 322                 lex.nextToken();
 323                 if (lex.GetString() == "\\end_inset")
 324                         break;
 325                 lyxerr << "InsetFormula::Read: Garbage before \\end_inset,"
 326                         " or missing \\end_inset!" << endl;
 327         }
 328
 329 #ifdef DEBUG
 330         Write(lyxerr);
 331 #endif
 332 }
 333
 334
 335 int InsetFormula::ascent(BufferView *, LyXFont const &) const
 336 {
 337         return par->Ascent() + (disp_flag ? 8 : 1);
 338 }
 339
 340
 341 int InsetFormula::descent(BufferView *, LyXFont const &) const
 342 {
 343         return par->Descent() + (disp_flag ? 8 : 1);
 344 }
 345
 346
 347 int InsetFormula::width(BufferView * bv, LyXFont const & f) const
 348 {
 349         MathedInset::workWidth = bv->workWidth();
 350         lfont_size = f.size();
 351         par->Metrics();
 352         return par->Width(); //+2;
 353 }
 354
 355
 356 void InsetFormula::draw(BufferView * bv, LyXFont const & f,
 357                         int baseline, float & x, bool) const
 358 {
 359         MathedInset::workWidth = bv->workWidth();
 360         Painter & pain = bv->painter();
 361         // Seems commenting out solves a problem.
 362         LyXFont font = mathed_get_font(LM_TC_TEXTRM, LM_ST_TEXT);
 363         font.setSize(f.size());
 364         lfont_size = font.size();
 365         /// Let's try to wait a bit with this... (Lgb)
 366         //UpdatableInset::draw(pain, font, baseline, x);
 367
 368         // otherwise a segfault could occur
 369         // in some XDrawRectangles (i.e. matrix) (Matthias)
 370         if (mathcursor && mathcursor->GetPar() == par) {
 371                 if (mathcursor->Selection()) {
 372                         int n;
 373                         int * xp = 0;
 374                         int * yp = 0;
 375                         mathcursor->SelGetArea(&xp, &yp, n);
 376                         pain.fillPolygon(xp, yp, n, LColor::selection);
 377                 }
 378                 mathcursor->draw(pain, int(x), baseline);
 379         } else {
 380                 par->draw(pain, int(x), baseline);
 381         }
 382         x += float(width(bv, font));
 383
 384         if (is_numbered(par->GetType())) {
 385                 LyXFont wfont = WhichFont(LM_TC_BF, par->size());
 386                 wfont.setLatex(LyXFont::OFF);
 387
 388                 if (is_singlely_numbered(par->GetType())) {
 389                         string str;
 390                         if (!label.empty())
 391                                 str = string("(") + label + ")";
 392                         else
 393                                 str = string("(#)");
 394                         pain.text(int(x + 20), baseline, str, wfont);
 395                 } else {
 396                         MathMatrixInset * mt =
 397                                 static_cast<MathMatrixInset*>(par);
 398                         int y;
 399                         MathedRowSt const * crow = mt->getRowSt();
 400                         while (crow) {
 401                                 y = baseline + crow->getBaseline();
 402                                 if (crow->isNumbered()) {
 403                                         string str;
 404                                         if (!crow->getLabel().empty())
 405                                                 str = string("(") + crow->getLabel() + ")";
 406                                         else
 407                                                 str = "(#)";
 408                                         pain.text(int(x + 20), y, str, wfont);
 409                                 }
 410                                 crow = crow->getNext();
 411                         }
 412                 }
 413         }
 414         cursor_visible = false;
 415 }
 416
 417
 418 string const InsetFormula::EditMessage() const
 419 {
 420         return _("Math editor mode");
 421 }
 422
 423
 424 void InsetFormula::Edit(BufferView * bv, int x, int y, unsigned int)
 425 {
 426         mathcursor = new MathedCursor(par);
 427
 428         if (!bv->lockInset(this))
 429                 lyxerr[Debug::MATHED] << "Cannot lock inset!!!" << endl;
 430
 431         par->Metrics();
 432         bv->updateInset(this, false);
 433         x += par->xo();
 434         y += par->yo();
 435         mathcursor->SetPos(x, y);
 436         sel_x = 0;
 437         sel_y = 0;
 438         sel_flag = false;
 439 }
 440
 441
 442 void InsetFormula::InsetUnlock(BufferView * bv)
 443 {
 444         if (mathcursor) {
 445                 if (mathcursor->InMacroMode()) {
 446                         mathcursor->MacroModeClose();
 447                         UpdateLocal(bv);
 448                 }
 449                 delete mathcursor;
 450         }
 451         mathcursor = 0;
 452         bv->updateInset(this, false);
 453 }
 454
 455
 456 // Now a symbol can be inserted only if the inset is locked
 457 void InsetFormula::InsertSymbol(BufferView * bv, string const & s)
 458 {
 459         if (s.empty() || !mathcursor)
 460                 return;
 461         mathcursor->Interpret(s);
 462         UpdateLocal(bv);
 463 }
 464
 465
 466 void InsetFormula::GetCursorPos(BufferView *, int & x, int & y) const
 467 {
 468         mathcursor->GetPos(x, y);
 469         x -= par->xo();
 470         y -= par->yo();
 471 }
 472
 473
 474 void InsetFormula::ToggleInsetCursor(BufferView * bv)
 475 {
 476         if (!mathcursor)
 477                 return;
 478
 479         int x;
 480         int y;
 481         mathcursor->GetPos(x, y);
 482         //  x -= par->xo;
 483         y -= par->yo();
 484         LyXFont font = WhichFont(LM_TC_TEXTRM, LM_ST_TEXT);
 485         int asc = lyxfont::maxAscent(font);
 486         int desc = lyxfont::maxDescent(font);
 487
 488         if (cursor_visible)
 489                 bv->hideLockedInsetCursor();
 490         else
 491                 bv->showLockedInsetCursor(x, y, asc, desc);
 492
 493         cursor_visible = !cursor_visible;
 494 }
 495
 496
 497 void InsetFormula::ShowInsetCursor(BufferView * bv, bool)
 498 {
 499         if (!cursor_visible) {
 500                 if (mathcursor) {
 501                         int x;
 502                         int y;
 503                         mathcursor->GetPos(x, y);
 504                         //  x -= par->xo;
 505                         y -= par->yo();
 506                         LyXFont font = WhichFont(LM_TC_TEXTRM, LM_ST_TEXT);
 507                         int asc = lyxfont::maxAscent(font);
 508                         int desc = lyxfont::maxDescent(font);
 509                         bv->fitLockedInsetCursor(x, y, asc, desc);
 510                 }
 511                 ToggleInsetCursor(bv);
 512         }
 513 }
 514
 515
 516 void InsetFormula::HideInsetCursor(BufferView * bv)
 517 {
 518         if (cursor_visible)
 519                 ToggleInsetCursor(bv);
 520 }
 521
 522
 523 void InsetFormula::ToggleInsetSelection(BufferView * bv)
 524 {
 525         if (!mathcursor)
 526                 return;
 527
 528         bv->updateInset(this, false);
 529 }
 530
 531
 532 void InsetFormula::display(bool dspf)
 533 {
 534         if (dspf != disp_flag) {
 535                 if (dspf) {
 536                         par->SetType(LM_OT_PAR);
 537                         par->SetStyle(LM_ST_DISPLAY);
 538                 } else {
 539                         if (is_multiline(par->GetType())) {
 540                                 MathParInset * p = new MathParInset(par);
 541                                 delete par;
 542                                 par = p;
 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                 MathedRowSt const * crow = mt->getRowSt();
 567                 while (crow) {
 568                         if (!crow->getLabel().empty())
 569                                 label_list.push_back(crow->getLabel());
 570                         crow = crow->getNext();
 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;  sel_y = y;
 610         if (mathcursor && mathcursor->Selection()) {
 611                 mathcursor->SelClear();
 612                 bv->updateInset(this, false);
 613         }
 614 }
 615
 616
 617 void InsetFormula::InsetMotionNotify(BufferView * bv,
 618                                      int x, int y, int /*button*/)
 619 {
 620         if (sel_x && sel_y && abs(x-sel_x) > 4 && !sel_flag) {
 621                 sel_flag = true;
 622                 HideInsetCursor(bv);
 623                 mathcursor->SetPos(sel_x + par->xo(), sel_y + par->yo());
 624                 mathcursor->SelStart();
 625                 ShowInsetCursor(bv);
 626                 mathcursor->GetPos(sel_x, sel_y);
 627         } else if (sel_flag) {
 628                 HideInsetCursor(bv);
 629                 x += par->xo();
 630                 y += par->yo();
 631                 mathcursor->SetPos(x, y);
 632                 ShowInsetCursor(bv);
 633                 mathcursor->GetPos(x, y);
 634                 if (sel_x != x || sel_y != y)
 635                         bv->updateInset(this, false);
 636                 sel_x = x;
 637                 sel_y = y;
 638         }
 639 }
 640
 641
 642 void InsetFormula::InsetKeyPress(XKeyEvent *)
 643 {
 644         lyxerr[Debug::MATHED] << "Used InsetFormula::InsetKeyPress." << endl;
 645 }
 646
 647
 648 // Special Mathed functions
 649 bool InsetFormula::SetNumber(bool numbf)
 650 {
 651         if (disp_flag) {
 652                 short type = par->GetType();
 653                 bool const oldf = is_numbered(type);
 654                 if (numbf && !oldf)
 655                         ++type;
 656                 if (!numbf && oldf)
 657                         --type;
 658                 par->SetType(type);
 659                 return oldf;
 660         } else
 661                 return false;
 662 }
 663
 664
 665 UpdatableInset::RESULT
 666 InsetFormula::LocalDispatch(BufferView * bv, int action, string const & arg)
 667 {
 668         //   extern char *dispatch_result;
 669         MathedTextCodes varcode = LM_TC_MIN;
 670         bool was_macro = mathcursor->InMacroMode();
 671         bool sel = false;
 672         bool space_on = false;
 673         bool was_selection = mathcursor->Selection();
 674         RESULT result = DISPATCHED;
 675         static MathSpaceInset * sp= 0;
 676
 677         HideInsetCursor(bv);
 678
 679         if (mathcursor->getLastCode() == LM_TC_TEX) {
 680                 varcode = LM_TC_TEX;
 681         }
 682
 683         switch (action) {
 684                 // --- Cursor Movements ---------------------------------------------
 685         case LFUN_RIGHTSEL:
 686                 sel = true; // fall through...
 687
 688         case LFUN_RIGHT:
 689                 result = DISPATCH_RESULT(mathcursor->Right(sel));
 690                 if (!sel && (result == DISPATCHED))
 691                         result = DISPATCHED_NOUPDATE;
 692                 break;
 693
 694
 695         case LFUN_LEFTSEL:
 696                 sel = true; // fall through
 697
 698         case LFUN_LEFT:
 699                 result = DISPATCH_RESULT(mathcursor->Left(sel));
 700                 if (!sel && (result == DISPATCHED))
 701                         result = DISPATCHED_NOUPDATE;
 702                 break;
 703
 704
 705         case LFUN_UPSEL:
 706                 sel = true;
 707
 708         case LFUN_UP:
 709                 result = DISPATCH_RESULT(mathcursor->Up(sel));
 710                 if (!sel && (result == DISPATCHED))
 711                         result = DISPATCHED_NOUPDATE;
 712                 break;
 713
 714
 715         case LFUN_DOWNSEL:
 716                 sel = true;
 717
 718         case LFUN_DOWN:
 719                 result = DISPATCH_RESULT(mathcursor->Down(sel));
 720                 if (!sel && (result == DISPATCHED))
 721                         result = DISPATCHED_NOUPDATE;
 722                 break;
 723
 724
 725         case LFUN_HOME:
 726                 mathcursor->Home();
 727                 result = DISPATCHED_NOUPDATE;
 728                 break;
 729
 730         case LFUN_END:
 731                 mathcursor->End();
 732                 result = DISPATCHED_NOUPDATE;
 733                 break;
 734
 735         case LFUN_DELETE_LINE_FORWARD:
 736                 bv->lockedInsetStoreUndo(Undo::DELETE);
 737                 mathcursor->DelLine();
 738                 UpdateLocal(bv);
 739                 break;
 740
 741         case LFUN_BREAKLINE:
 742         {
 743                 bv->lockedInsetStoreUndo(Undo::INSERT);
 744                 byte c = arg.empty() ? '1' : arg[0];
 745                 mathcursor->Insert(c, LM_TC_CR);
 746                 if (!label.empty()) {
 747                         mathcursor->setLabel(label);
 748                         label.erase();
 749                 }
 750                 par = mathcursor->GetPar();
 751                 UpdateLocal(bv);
 752         }
 753         break;
 754
 755         case LFUN_TAB:
 756                 bv->lockedInsetStoreUndo(Undo::INSERT);
 757                 mathcursor->Insert(0, LM_TC_TAB);
 758                 //UpdateInset(this);
 759                 break;
 760
 761         case LFUN_TABINSERT:
 762                 bv->lockedInsetStoreUndo(Undo::INSERT);
 763                 mathcursor->Insert('T', LM_TC_TAB);
 764                 UpdateLocal(bv);
 765                 break;
 766
 767         case LFUN_BACKSPACE:
 768                 if (!mathcursor->Left())
 769                         break;
 770
 771                 if (!mathcursor->InMacroMode() && mathcursor->pullArg()) {
 772                         bv->updateInset(this, true);
 773                         break;
 774                 }
 775                 // fall through...
 776
 777         case LFUN_DELETE:
 778                 bv->lockedInsetStoreUndo(Undo::DELETE);
 779                 mathcursor->Delete();
 780                 bv->updateInset(this, true);
 781                 break;
 782
 783                 //    case LFUN_GETXY:
 784                 //      sprintf(dispatch_buffer, "%d %d",);
 785                 //      dispatch_result = dispatch_buffer;
 786                 //      break;
 787         case LFUN_SETXY:
 788         {
 789                 int x;
 790                 int y;
 791                 int x1;
 792                 int y1;
 793                 istringstream ist(arg.c_str());
 794                 ist >> x >> y;
 795                 par->GetXY(x1, y1);
 796                 mathcursor->SetPos(x1 + x, y1 + y);
 797         }
 798         break;
 799
 800                 /* cursor selection ---------------------------- */
 801
 802         case LFUN_PASTE:
 803                 if (was_macro)
 804                         mathcursor->MacroModeClose();
 805                 bv->lockedInsetStoreUndo(Undo::INSERT);
 806                 mathcursor->SelPaste();
 807                 UpdateLocal(bv);
 808                 break;
 809
 810         case LFUN_CUT:
 811                 bv->lockedInsetStoreUndo(Undo::DELETE);
 812                 mathcursor->SelCut();
 813                 UpdateLocal(bv);
 814                 break;
 815
 816         case LFUN_COPY:
 817                 mathcursor->SelCopy();
 818                 break;
 819
 820         case LFUN_HOMESEL:
 821         case LFUN_ENDSEL:
 822         case LFUN_WORDRIGHTSEL:
 823         case LFUN_WORDLEFTSEL:
 824                 break;
 825
 826                 // --- accented characters ------------------------------
 827
 828         case LFUN_UMLAUT:     mathcursor->setAccent(LM_ddot); break;
 829         case LFUN_CIRCUMFLEX: mathcursor->setAccent(LM_hat); break;
 830         case LFUN_GRAVE:      mathcursor->setAccent(LM_grave); break;
 831         case LFUN_ACUTE:      mathcursor->setAccent(LM_acute); break;
 832         case LFUN_TILDE:      mathcursor->setAccent(LM_tilde); break;
 833         case LFUN_MACRON:     mathcursor->setAccent(LM_bar); break;
 834         case LFUN_DOT:        mathcursor->setAccent(LM_dot); break;
 835         case LFUN_CARON:      mathcursor->setAccent(LM_check); break;
 836         case LFUN_BREVE:      mathcursor->setAccent(LM_breve); break;
 837         case LFUN_VECTOR:     mathcursor->setAccent(LM_vec); break;
 838
 839                 // Greek mode
 840         case LFUN_GREEK:
 841                 if (!greek_kb_flag) {
 842                         greek_kb_flag = 1;
 843                         bv->owner()->getMiniBuffer()->Set(_("Math greek mode on"));
 844                 } else
 845                         greek_kb_flag = 0;
 846                 break;
 847
 848                 // Greek keyboard
 849         case LFUN_GREEK_TOGGLE:
 850                 greek_kb_flag = (greek_kb_flag) ? 0 : 2;
 851                 if (greek_kb_flag)
 852                         bv->owner()->getMiniBuffer()->Set(_("Math greek keyboard on"));
 853                 else
 854                         bv->owner()->getMiniBuffer()->Set(_("Math greek keyboard off"));
 855                 break;
 856
 857                 //  Math fonts
 858         case LFUN_BOLD:  mathcursor->toggleLastCode(LM_TC_BF); break;
 859         case LFUN_SANS:  mathcursor->toggleLastCode(LM_TC_SF); break;
 860         case LFUN_EMPH:  mathcursor->toggleLastCode(LM_TC_CAL); break;
 861         case LFUN_ROMAN: mathcursor->toggleLastCode(LM_TC_RM); break;
 862         case LFUN_CODE:  mathcursor->toggleLastCode(LM_TC_TT); break;
 863         case LFUN_DEFAULT:  mathcursor->setLastCode(LM_TC_VAR); break;
 864
 865         case LFUN_TEX:
 866                 // varcode = LM_TC_TEX;
 867                 mathcursor->setLastCode(LM_TC_TEX);
 868                 bv->owner()->getMiniBuffer()->Set(_("TeX mode"));
 869                 break;
 870
 871         case LFUN_MATH_NUMBER:
 872                 bv->lockedInsetStoreUndo(Undo::INSERT);
 873                 if (disp_flag) {
 874                         short type = par->GetType();
 875                         if (is_numbered(type)) {
 876                                 --type;
 877                                 if (!label.empty()) {
 878                                         label.erase();
 879                                 }
 880                                 bv->owner()->getMiniBuffer()->Set(_("No number"));
 881                         } else {
 882                                 ++type;
 883                                 bv->owner()->getMiniBuffer()->Set(_("Number"));
 884                         }
 885                         par->SetType(type);
 886                         UpdateLocal(bv);
 887                 }
 888                 break;
 889
 890         case LFUN_MATH_NONUMBER:
 891                 if (is_multi_numbered(par->GetType())) {
 892                                 //         MathMatrixInset *mt = (MathMatrixInset*)par;
 893                                 //BUG
 894                                 //         mt->SetNumbered(!mt->IsNumbered());
 895
 896 #warning This is a terrible hack! We should find a better solution.
 897                         while (mathcursor->getLabel() == MathedXIter::error_label) {
 898                                 if (LocalDispatch(bv, LFUN_LEFT, string()) == FINISHED)
 899                                         return DISPATCHED;
 900                         }
 901                         mathcursor->setNumbered();
 902                         UpdateLocal(bv);
 903                 }
 904                 break;
 905
 906         case LFUN_MATH_LIMITS:
 907                 bv->lockedInsetStoreUndo(Undo::INSERT);
 908                 if (mathcursor->Limits())
 909                         UpdateLocal(bv);
 910                 // fall through!
 911
 912         case LFUN_MATH_SIZE:
 913                 if (!arg.empty()) {
 914                         latexkeys const * l = in_word_set(arg);
 915                         int sz = (l) ? l->id: -1;
 916                         mathcursor->SetSize(sz);
 917                         UpdateLocal(bv);
 918                         break;
 919                 }
 920                 // possible fall through?
 921
 922         case LFUN_INSERT_MATH:
 923                 bv->lockedInsetStoreUndo(Undo::INSERT);
 924                 InsertSymbol(bv, arg);
 925                 break;
 926
 927
 928         case LFUN_INSERT_MATRIX:
 929         {
 930                 bv->lockedInsetStoreUndo(Undo::INSERT);
 931                 int k, m, n;
 932                 char s[80], arg2[80];
 933                                 // This is just so that too long args won't ooze out of s.
 934                 strncpy(arg2, arg.c_str(), 80); arg2[79]= '\0';
 935                 k = sscanf(arg2, "%d %d %s", &m, &n, s);
 936                 s[79] = '\0';
 937
 938                 if (k < 1) {
 939                         m = n = 1;
 940                 } else if (k == 1) {
 941                         n = 1;
 942                 }
 943
 944                 MathMatrixInset * p = new MathMatrixInset(m, n);
 945                 if (mathcursor && p) {
 946                         if (k > 2 && int(strlen(s)) > m)
 947                                 p->SetAlign(s[0], &s[1]);
 948                         mathcursor->insertInset(p, LM_TC_ACTIVE_INSET);
 949                         UpdateLocal(bv);
 950                 }
 951                 break;
 952         }
 953
 954         case LFUN_MATH_DELIM:
 955         {
 956                 bv->lockedInsetStoreUndo(Undo::INSERT);
 957                 char lf[40], rg[40], arg2[40];
 958                 int ilf = '(', irg = '.';
 959                 latexkeys const * l;
 960                 string vdelim("(){}[]./|");
 961
 962                 if (arg.empty())
 963                         break;
 964                 ::strncpy(arg2, arg.c_str(), 40);
 965                 arg2[39]= '\0';
 966                 int n = sscanf(arg2, "%s %s", lf, rg);
 967                 lf[39] = '\0';
 968                 rg[39] = '\0';
 969
 970                 if (n > 0) {
 971                         if (isdigit(lf[0]))
 972                                 ilf = lyx::atoi(lf);
 973                         else
 974                                 if (lf[1]) {
 975                                         l = in_word_set(lf, strlen(lf));
 976                                         // Long words will cause l == 0; so check.
 977                                         if (l)
 978                                                 ilf = l->id;
 979                                 } else if (vdelim.find(lf[0]) != string::npos)
 980                                         ilf = lf[0];
 981
 982                         if (n > 1) {
 983                                 if (isdigit(rg[0]))
 984                                         irg = lyx::atoi(rg);
 985                                 else
 986                                         if (rg[1]) {
 987                                                 l = in_word_set(rg, strlen(rg));
 988                                                 if (l)
 989                                                         irg = l->id;
 990                                         } else if (vdelim.find(rg[0]) != string::npos)
 991                                                 irg = rg[0];
 992                         }
 993                 }
 994
 995                 MathDelimInset * p = new MathDelimInset(ilf, irg);
 996                 mathcursor->insertInset(p, LM_TC_ACTIVE_INSET);
 997                 UpdateLocal(bv);
 998                 break;
 999         }
1000
1001         case LFUN_PROTECTEDSPACE:
1002                 bv->lockedInsetStoreUndo(Undo::INSERT);
1003                 sp = new MathSpaceInset(1);
1004                 mathcursor->insertInset(sp, LM_TC_INSET);
1005                 space_on = true;
1006                 UpdateLocal(bv);
1007                 break;
1008
1009         case LFUN_INSERT_LABEL:
1010         {
1011                 bv->lockedInsetStoreUndo(Undo::INSERT);
1012                 if (par->GetType() < LM_OT_PAR)
1013                         break;
1014
1015                 string old_label = is_multiline(par->GetType())
1016                         ? mathcursor->getLabel() : label;
1017
1018 #warning This is a terrible hack! We should find a better solution.
1019                 // This is needed because in some positions
1020                 // mathcursor->cursor->crow is equal to 0, and therefore
1021                 // the label cannot be inserted.
1022                 // So we move the cursor left until
1023                 // mathcursor->cursor->crow != 0.
1024                 while (old_label == MathedXIter::error_label) {
1025                         if (LocalDispatch(bv, LFUN_LEFT, string()) == FINISHED)
1026                                 return DISPATCHED;
1027                         old_label = mathcursor->getLabel();
1028                 }
1029
1030                 string new_label = arg;
1031                 if (new_label.empty()) {
1032                         string default_label = (lyxrc.label_init_length >= 0) ? "eq:" : "";
1033                         pair<bool, string> res = old_label.empty()
1034                                 ? askForText(_("Enter new label to insert:"), default_label)
1035                                 : askForText(_("Enter label:"), old_label);
1036                         if (!res.first)
1037                                 break;
1038                         new_label = frontStrip(strip(res.second));
1039                 }
1040
1041                 if (new_label == old_label)
1042                         break;  // Nothing to do
1043
1044                 if (!new_label.empty())
1045                         SetNumber(true);
1046
1047                 if (!new_label.empty() && bv->ChangeRefsIfUnique(old_label, new_label))
1048                         bv->redraw();
1049
1050                 if (is_multi_numbered(par->GetType())) {
1051                         mathcursor->setLabel(new_label);
1052                         // MathMatrixInset *mt = (MathMatrixInset*)par;
1053                         // mt->SetLabel(new_label);
1054                 } else
1055                         label = new_label;
1056
1057                 UpdateLocal(bv);
1058                 break;
1059         }
1060
1061         case LFUN_MATH_DISPLAY:
1062                 bv->lockedInsetStoreUndo(Undo::EDIT);
1063                 display(!disp_flag);
1064                 UpdateLocal(bv);
1065                 break;
1066
1067                 // Invalid actions under math mode
1068         case LFUN_MATH_MODE:
1069                 if (mathcursor->getLastCode()!= LM_TC_TEXTRM) {
1070                         bv->owner()->getMiniBuffer()->Set(_("math text mode"));
1071                         varcode = LM_TC_TEXTRM;
1072                 } else {
1073                         varcode = LM_TC_VAR;
1074                 }
1075                 mathcursor->setLastCode(varcode);
1076                 break;
1077
1078         case LFUN_UNDO:
1079                 bv->owner()->getMiniBuffer()->Set(_("Invalid action in math mode!"));
1080                 break;
1081
1082                 //------- dummy actions
1083         case LFUN_EXEC_COMMAND:
1084                 bv->owner()->getMiniBuffer()->PrepareForCommand();
1085                 break;
1086
1087         default:
1088                 if ((action == -1  || action == LFUN_SELFINSERT) && !arg.empty())  {
1089                         unsigned char c = arg[0];
1090                         bv->lockedInsetStoreUndo(Undo::INSERT);
1091
1092                         if (c == ' ' && mathcursor->getAccent() == LM_hat) {
1093                                 c = '^';
1094                                 mathcursor->setAccent(0);
1095                         }
1096
1097                         if (c == 0) {      // Dead key, do nothing
1098                                 //lyxerr << "deadkey" << endl;
1099                                 break;
1100                         }
1101
1102                         if (isalpha(c)) {
1103                                 if (mathcursor->getLastCode() == LM_TC_TEX) {
1104                                         mathcursor->MacroModeOpen();
1105                                         mathcursor->clearLastCode();
1106                                         varcode = LM_TC_MIN;
1107                                 } else if (!varcode) {
1108                                         short f = (mathcursor->getLastCode()) ?
1109                                                 mathcursor->getLastCode() :
1110                                                 static_cast<MathedTextCodes>(mathcursor->GetFCode());
1111                                         varcode = MathIsAlphaFont(f) ?
1112                                                 static_cast<MathedTextCodes>(f) :
1113                                                 LM_TC_VAR;
1114                                 }
1115
1116                                 //           lyxerr << "Varcode << vardoce;
1117                                 MathedTextCodes char_code = varcode;
1118                                 if (greek_kb_flag) {
1119                                         char greek[26] =
1120                                         {'A', 'B', 'X',  0 , 'E',  0 ,  0 , 'H', 'I',  0 ,
1121                                          'K',  0 , 'M', 'N', 'O',  0 ,  0 , 'P',  0 , 'T',
1122                                          'Y',  0,   0,   0,   0 , 'Z' };
1123
1124                                         if ('A' <= c && c <= 'Z' && greek[c - 'A']) {
1125                                                 char_code = LM_TC_RM;
1126                                                 c = greek[c - 'A'];
1127                                         } else
1128                                                 char_code = LM_TC_SYMB;
1129                                 }
1130
1131                                 mathcursor->Insert(c, char_code);
1132
1133                                 if (greek_kb_flag && char_code == LM_TC_RM )
1134                                         mathcursor->setLastCode(LM_TC_VAR);
1135
1136                                 varcode = LM_TC_MIN;
1137
1138                                 if (greek_kb_flag<2)
1139                                         greek_kb_flag = 0;
1140
1141                         } else if (strchr("!,:;{}", c) && (varcode == LM_TC_TEX||was_macro)) {
1142                                 mathcursor->Insert(c, LM_TC_TEX);
1143                                 if (c == '{') {
1144                                         mathcursor->Insert('}', LM_TC_TEX);
1145                                         mathcursor->Left();
1146                                 }
1147                                 mathcursor->clearLastCode();
1148                                 //             varcode = LM_TC_MIN;
1149                         } else if (c == '_' && varcode == LM_TC_TEX) {
1150                                 mathcursor->Insert(c, LM_TC_SPECIAL);
1151                                 mathcursor->clearLastCode();
1152                                 //             varcode = LM_TC_MIN;
1153                         } else if (('0'<= c && c<= '9') && (varcode == LM_TC_TEX||was_macro)) {
1154                                 mathcursor->MacroModeOpen();
1155                                 mathcursor->clearLastCode();
1156                                 mathcursor->Insert(c, LM_TC_MIN);
1157                         } else if (('0'<= c && c<= '9') || strchr(";:!|[]().,?", c)) {
1158                                 mathcursor->Insert(c, LM_TC_CONST);
1159                         } else if (strchr("+/-*<>=", c)) {
1160                                 mathcursor->Insert(c, LM_TC_BOP);
1161                         } else if (strchr(latex_special_chars, c) && c!= '_') {
1162                                 mathcursor->Insert(c, LM_TC_SPECIAL);
1163                         } else if (c == '_' || c == '^') {
1164                                 char s[2];
1165                                 s[0] = c;
1166                                 s[1] = 0;
1167                                 mathcursor->Interpret(s);
1168                         } else if (c == ' ') {
1169                                 if (!varcode) {
1170                                         short f = (mathcursor->getLastCode()) ?
1171                                                 mathcursor->getLastCode() :
1172                                                 static_cast<MathedTextCodes>(mathcursor->GetFCode());
1173                                         varcode = MathIsAlphaFont(f) ?
1174                                                 static_cast<MathedTextCodes>(f) :
1175                                                 LM_TC_VAR;
1176                                 }
1177
1178                                 if (varcode == LM_TC_TEXTRM) {
1179                                         mathcursor->Insert(c, LM_TC_TEXTRM);
1180                                 } else if (was_macro) {
1181                                         mathcursor->MacroModeClose();
1182                                 } else if (sp) {
1183                                         int isp = (sp->GetSpace()<5) ? sp->GetSpace()+1: 0;
1184                                         sp->SetSpace(isp);
1185                                         space_on = true;
1186                                 } else if (!mathcursor->Pop() && mathcursor->IsEnd())
1187                                         result = FINISHED;
1188                         } else if (c == '\'' || c == '@') {
1189                                 mathcursor->Insert (c, LM_TC_VAR);
1190                         } else if (c == '\\') {
1191                                 if (was_macro)
1192                                         mathcursor->MacroModeClose();
1193                                 bv->owner()->getMiniBuffer()->Set(_("TeX mode"));
1194                                 mathcursor->setLastCode(LM_TC_TEX);
1195                         }
1196                         UpdateLocal(bv);
1197                 } else if (action == LFUN_MATH_PANEL) {
1198                         result = UNDISPATCHED;
1199                 } else {
1200                         // lyxerr << "Closed by action " << action << endl;
1201                         result =  FINISHED;
1202                 }
1203         }
1204
1205         if (was_macro != mathcursor->InMacroMode()
1206             && action >= 0
1207             && action != LFUN_BACKSPACE)
1208                 UpdateLocal(bv);
1209
1210         if (sp && !space_on)
1211                 sp = 0;
1212
1213         if (mathcursor->Selection() || was_selection)
1214                 ToggleInsetSelection(bv);
1215
1216         if ((result == DISPATCHED) || (result == DISPATCHED_NOUPDATE) ||
1217             (result == UNDISPATCHED))
1218                 ShowInsetCursor(bv);
1219         else
1220                 bv->unlockInset(this);
1221
1222         return result;
1223 }
1224
1225
1226
1227 static
1228 void mathedValidate(LaTeXFeatures & features, MathParInset * par)
1229 {
1230         MathedIter it(par->GetData());
1231
1232         while (it.OK() && !(features.binom && features.boldsymbol)) {
1233                 if (it.IsInset()) {
1234                         if (it.IsActive()) {
1235                                 MathParInset * p = it.GetActiveInset();
1236                                 if (!features.binom && p->GetType() == LM_OT_MACRO &&
1237                                     p->GetName() == "binom") {
1238                                         features.binom = true;
1239                                 } else {
1240                                         for (int i = 0; i <= p->getMaxArgumentIdx(); ++i) {
1241                                                 p->setArgumentIdx(i);
1242                                                 mathedValidate(features, p);
1243                                         }
1244                                 }
1245                         } else {
1246                                 MathedInset * p = it.GetInset();
1247                                 if (!features.boldsymbol && p->GetName() == "boldsymbol") {
1248                                         features.boldsymbol = true;
1249                                 }
1250                         }
1251                 }
1252                 it.Next();
1253         }
1254 }
1255
1256
1257 static
1258 int mathed_write(MathParInset * p, ostream & os,
1259                  bool fragile, string const & label)
1260 {
1261         number_of_newlines = 0;
1262         short mathed_env = p->GetType();
1263
1264         if (mathed_env == LM_OT_MIN) {
1265                 if (fragile) os << "\\protect";
1266                 os << "\\( "; // changed from " \\( " (Albrecht Dress)
1267         } else {
1268                 if (mathed_env == LM_OT_PAR){
1269                         os << "\\[\n";
1270                 } else {
1271                         os << "\\begin{"
1272                            << latex_mathenv[mathed_env]
1273                            << "}";
1274                         if (is_multicolumn(mathed_env)) {
1275                                 if (mathed_env != LM_OT_ALIGNAT
1276                                     && mathed_env != LM_OT_ALIGNATN)
1277                                         os << "%";
1278                                 os << "{" << p->GetColumns()/2 << "}";
1279                         }
1280                         os << "\n";
1281                 }
1282                 ++number_of_newlines;
1283         }
1284
1285         if (!label.empty() && label[0] > ' '
1286             && is_singlely_numbered(mathed_env)) {
1287                 os << "\\label{"
1288                    << label
1289                    << "}\n";
1290                 ++number_of_newlines;
1291         }
1292
1293         p->Write(os, fragile);
1294
1295         if (mathed_env == LM_OT_MIN){
1296                 if (fragile) os << "\\protect";
1297                 os << " \\)";
1298         } else if (mathed_env == LM_OT_PAR) {
1299                 os << "\\]\n";
1300                 ++number_of_newlines;
1301         } else {
1302                 os << "\n\\end{"
1303                    << latex_mathenv[mathed_env]
1304                    << "}\n";
1305                 number_of_newlines += 2;
1306         }
1307         return number_of_newlines;
1308 }