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                                 if (mathcursor)
 541                                         mathcursor->SetPar(par);
 542                         }
 543                         par->SetType(LM_OT_MIN);
 544                         par->SetStyle(LM_ST_TEXT);
 545                         if (!label.empty()) {
 546                                 label.erase();
 547                         }
 548                 }
 549                 disp_flag = dspf;
 550         }
 551 }
 552
 553
 554 vector<string> const InsetFormula::getLabelList() const
 555 {
 556         //#warning This is dirty, I know. Ill clean it at 0.11
 557         // Correction, the only way to clean this is with a new kernel: 0.13.
 558
 559         vector<string> label_list;
 560
 561         if (is_multi_numbered(par->GetType())) {
 562                 MathMatrixInset * mt = static_cast<MathMatrixInset*>(par);
 563                 MathedRowSt const * crow = mt->getRowSt();
 564                 while (crow) {
 565                         if (!crow->getLabel().empty())
 566                                 label_list.push_back(crow->getLabel());
 567                         crow = crow->getNext();
 568                 }
 569         } else if (!label.empty())
 570                 label_list.push_back(label);
 571
 572         return label_list;
 573 }
 574
 575
 576 void InsetFormula::UpdateLocal(BufferView * bv)
 577 {
 578         par->Metrics();  // To inform lyx kernel the exact size
 579         // (there were problems with arrays).
 580         bv->updateInset(this, true);
 581 }
 582
 583
 584 void InsetFormula::InsetButtonRelease(BufferView * bv,
 585                                       int x, int y, int /*button*/)
 586 {
 587         if (mathcursor) {
 588                 HideInsetCursor(bv);
 589                 x += par->xo();
 590                 y += par->yo();
 591                 mathcursor->SetPos(x, y);
 592                 ShowInsetCursor(bv);
 593                 if (sel_flag) {
 594                         sel_flag = false;
 595                         sel_x = sel_y = 0;
 596                         bv->updateInset(this, false);
 597                 }
 598         }
 599 }
 600
 601
 602 void InsetFormula::InsetButtonPress(BufferView * bv, int x, int y,
 603                                     int /*button*/)
 604 {
 605         sel_flag = false;
 606         sel_x = x;  sel_y = y;
 607         if (mathcursor && mathcursor->Selection()) {
 608                 mathcursor->SelClear();
 609                 bv->updateInset(this, false);
 610         }
 611 }
 612
 613
 614 void InsetFormula::InsetMotionNotify(BufferView * bv,
 615                                      int x, int y, int /*button*/)
 616 {
 617         if (sel_x && sel_y && abs(x-sel_x) > 4 && !sel_flag) {
 618                 sel_flag = true;
 619                 HideInsetCursor(bv);
 620                 mathcursor->SetPos(sel_x + par->xo(), sel_y + par->yo());
 621                 mathcursor->SelStart();
 622                 ShowInsetCursor(bv);
 623                 mathcursor->GetPos(sel_x, sel_y);
 624         } else if (sel_flag) {
 625                 HideInsetCursor(bv);
 626                 x += par->xo();
 627                 y += par->yo();
 628                 mathcursor->SetPos(x, y);
 629                 ShowInsetCursor(bv);
 630                 mathcursor->GetPos(x, y);
 631                 if (sel_x != x || sel_y != y)
 632                         bv->updateInset(this, false);
 633                 sel_x = x;
 634                 sel_y = y;
 635         }
 636 }
 637
 638
 639 void InsetFormula::InsetKeyPress(XKeyEvent *)
 640 {
 641         lyxerr[Debug::MATHED] << "Used InsetFormula::InsetKeyPress." << endl;
 642 }
 643
 644
 645 // Special Mathed functions
 646 bool InsetFormula::SetNumber(bool numbf)
 647 {
 648         if (disp_flag) {
 649                 short type = par->GetType();
 650                 bool const oldf = is_numbered(type);
 651                 if (numbf && !oldf)
 652                         ++type;
 653                 if (!numbf && oldf)
 654                         --type;
 655                 par->SetType(type);
 656                 return oldf;
 657         } else
 658                 return false;
 659 }
 660
 661
 662 UpdatableInset::RESULT
 663 InsetFormula::LocalDispatch(BufferView * bv, int action, string const & arg)
 664 {
 665         //   extern char *dispatch_result;
 666         MathedTextCodes varcode = LM_TC_MIN;
 667         bool was_macro = mathcursor->InMacroMode();
 668         bool sel = false;
 669         bool space_on = false;
 670         bool was_selection = mathcursor->Selection();
 671         RESULT result = DISPATCHED;
 672         static MathSpaceInset * sp= 0;
 673
 674         HideInsetCursor(bv);
 675
 676         if (mathcursor->getLastCode() == LM_TC_TEX) {
 677                 varcode = LM_TC_TEX;
 678         }
 679
 680         switch (action) {
 681                 // --- Cursor Movements ---------------------------------------------
 682         case LFUN_RIGHTSEL:
 683                 sel = true; // fall through...
 684
 685         case LFUN_RIGHT:
 686                 result = DISPATCH_RESULT(mathcursor->Right(sel));
 687                 if (!sel && (result == DISPATCHED))
 688                         result = DISPATCHED_NOUPDATE;
 689                 break;
 690
 691
 692         case LFUN_LEFTSEL:
 693                 sel = true; // fall through
 694
 695         case LFUN_LEFT:
 696                 result = DISPATCH_RESULT(mathcursor->Left(sel));
 697                 if (!sel && (result == DISPATCHED))
 698                         result = DISPATCHED_NOUPDATE;
 699                 break;
 700
 701
 702         case LFUN_UPSEL:
 703                 sel = true;
 704
 705         case LFUN_UP:
 706                 result = DISPATCH_RESULT(mathcursor->Up(sel));
 707                 if (!sel && (result == DISPATCHED))
 708                         result = DISPATCHED_NOUPDATE;
 709                 break;
 710
 711
 712         case LFUN_DOWNSEL:
 713                 sel = true;
 714
 715         case LFUN_DOWN:
 716                 result = DISPATCH_RESULT(mathcursor->Down(sel));
 717                 if (!sel && (result == DISPATCHED))
 718                         result = DISPATCHED_NOUPDATE;
 719                 break;
 720
 721
 722         case LFUN_HOME:
 723                 mathcursor->Home();
 724                 result = DISPATCHED_NOUPDATE;
 725                 break;
 726
 727         case LFUN_END:
 728                 mathcursor->End();
 729                 result = DISPATCHED_NOUPDATE;
 730                 break;
 731
 732         case LFUN_DELETE_LINE_FORWARD:
 733                 bv->lockedInsetStoreUndo(Undo::DELETE);
 734                 mathcursor->DelLine();
 735                 UpdateLocal(bv);
 736                 break;
 737
 738         case LFUN_BREAKLINE:
 739         {
 740                 bv->lockedInsetStoreUndo(Undo::INSERT);
 741                 byte c = arg.empty() ? '1' : arg[0];
 742                 mathcursor->Insert(c, LM_TC_CR);
 743                 if (!label.empty()) {
 744                         mathcursor->setLabel(label);
 745                         label.erase();
 746                 }
 747                 par = mathcursor->GetPar();
 748                 UpdateLocal(bv);
 749         }
 750         break;
 751
 752         case LFUN_TAB:
 753                 bv->lockedInsetStoreUndo(Undo::INSERT);
 754                 mathcursor->Insert(0, LM_TC_TAB);
 755                 //UpdateInset(this);
 756                 break;
 757
 758         case LFUN_TABINSERT:
 759                 bv->lockedInsetStoreUndo(Undo::INSERT);
 760                 mathcursor->Insert('T', LM_TC_TAB);
 761                 UpdateLocal(bv);
 762                 break;
 763
 764         case LFUN_BACKSPACE:
 765                 if (!mathcursor->Left())
 766                         break;
 767
 768                 if (!mathcursor->InMacroMode() && mathcursor->pullArg()) {
 769                         bv->updateInset(this, true);
 770                         break;
 771                 }
 772                 // fall through...
 773
 774         case LFUN_DELETE:
 775                 bv->lockedInsetStoreUndo(Undo::DELETE);
 776                 mathcursor->Delete();
 777                 bv->updateInset(this, true);
 778                 break;
 779
 780                 //    case LFUN_GETXY:
 781                 //      sprintf(dispatch_buffer, "%d %d",);
 782                 //      dispatch_result = dispatch_buffer;
 783                 //      break;
 784         case LFUN_SETXY:
 785         {
 786                 int x;
 787                 int y;
 788                 int x1;
 789                 int y1;
 790                 istringstream ist(arg.c_str());
 791                 ist >> x >> y;
 792                 par->GetXY(x1, y1);
 793                 mathcursor->SetPos(x1 + x, y1 + y);
 794         }
 795         break;
 796
 797                 /* cursor selection ---------------------------- */
 798
 799         case LFUN_PASTE:
 800                 if (was_macro)
 801                         mathcursor->MacroModeClose();
 802                 bv->lockedInsetStoreUndo(Undo::INSERT);
 803                 mathcursor->SelPaste();
 804                 UpdateLocal(bv);
 805                 break;
 806
 807         case LFUN_CUT:
 808                 bv->lockedInsetStoreUndo(Undo::DELETE);
 809                 mathcursor->SelCut();
 810                 UpdateLocal(bv);
 811                 break;
 812
 813         case LFUN_COPY:
 814                 mathcursor->SelCopy();
 815                 break;
 816
 817         case LFUN_HOMESEL:
 818         case LFUN_ENDSEL:
 819         case LFUN_WORDRIGHTSEL:
 820         case LFUN_WORDLEFTSEL:
 821                 break;
 822
 823                 // --- accented characters ------------------------------
 824
 825         case LFUN_UMLAUT:     mathcursor->setAccent(LM_ddot); break;
 826         case LFUN_CIRCUMFLEX: mathcursor->setAccent(LM_hat); break;
 827         case LFUN_GRAVE:      mathcursor->setAccent(LM_grave); break;
 828         case LFUN_ACUTE:      mathcursor->setAccent(LM_acute); break;
 829         case LFUN_TILDE:      mathcursor->setAccent(LM_tilde); break;
 830         case LFUN_MACRON:     mathcursor->setAccent(LM_bar); break;
 831         case LFUN_DOT:        mathcursor->setAccent(LM_dot); break;
 832         case LFUN_CARON:      mathcursor->setAccent(LM_check); break;
 833         case LFUN_BREVE:      mathcursor->setAccent(LM_breve); break;
 834         case LFUN_VECTOR:     mathcursor->setAccent(LM_vec); break;
 835
 836                 // Greek mode
 837         case LFUN_GREEK:
 838                 if (!greek_kb_flag) {
 839                         greek_kb_flag = 1;
 840                         bv->owner()->getMiniBuffer()->Set(_("Math greek mode on"));
 841                 } else
 842                         greek_kb_flag = 0;
 843                 break;
 844
 845                 // Greek keyboard
 846         case LFUN_GREEK_TOGGLE:
 847                 greek_kb_flag = (greek_kb_flag) ? 0 : 2;
 848                 if (greek_kb_flag)
 849                         bv->owner()->getMiniBuffer()->Set(_("Math greek keyboard on"));
 850                 else
 851                         bv->owner()->getMiniBuffer()->Set(_("Math greek keyboard off"));
 852                 break;
 853
 854                 //  Math fonts
 855         case LFUN_BOLD:  mathcursor->toggleLastCode(LM_TC_BF); break;
 856         case LFUN_SANS:  mathcursor->toggleLastCode(LM_TC_SF); break;
 857         case LFUN_EMPH:  mathcursor->toggleLastCode(LM_TC_CAL); break;
 858         case LFUN_ROMAN: mathcursor->toggleLastCode(LM_TC_RM); break;
 859         case LFUN_CODE:  mathcursor->toggleLastCode(LM_TC_TT); break;
 860         case LFUN_DEFAULT:  mathcursor->setLastCode(LM_TC_VAR); break;
 861
 862         case LFUN_TEX:
 863                 // varcode = LM_TC_TEX;
 864                 mathcursor->setLastCode(LM_TC_TEX);
 865                 bv->owner()->getMiniBuffer()->Set(_("TeX mode"));
 866                 break;
 867
 868         case LFUN_MATH_NUMBER:
 869                 bv->lockedInsetStoreUndo(Undo::INSERT);
 870                 if (disp_flag) {
 871                         short type = par->GetType();
 872                         if (is_numbered(type)) {
 873                                 --type;
 874                                 if (!label.empty()) {
 875                                         label.erase();
 876                                 }
 877                                 bv->owner()->getMiniBuffer()->Set(_("No number"));
 878                         } else {
 879                                 ++type;
 880                                 bv->owner()->getMiniBuffer()->Set(_("Number"));
 881                         }
 882                         par->SetType(type);
 883                         UpdateLocal(bv);
 884                 }
 885                 break;
 886
 887         case LFUN_MATH_NONUMBER:
 888                 if (is_multi_numbered(par->GetType())) {
 889                                 //         MathMatrixInset *mt = (MathMatrixInset*)par;
 890                                 //BUG
 891                                 //         mt->SetNumbered(!mt->IsNumbered());
 892
 893 #warning This is a terrible hack! We should find a better solution.
 894                         while (mathcursor->getLabel() == MathedXIter::error_label) {
 895                                 if (LocalDispatch(bv, LFUN_LEFT, string()) == FINISHED)
 896                                         return DISPATCHED;
 897                         }
 898                         mathcursor->setNumbered();
 899                         UpdateLocal(bv);
 900                 }
 901                 break;
 902
 903         case LFUN_MATH_LIMITS:
 904                 bv->lockedInsetStoreUndo(Undo::INSERT);
 905                 if (mathcursor->Limits())
 906                         UpdateLocal(bv);
 907                 // fall through!
 908
 909         case LFUN_MATH_SIZE:
 910                 if (!arg.empty()) {
 911                         latexkeys const * l = in_word_set(arg);
 912                         int sz = (l) ? l->id: -1;
 913                         mathcursor->SetSize(sz);
 914                         UpdateLocal(bv);
 915                         break;
 916                 }
 917                 // possible fall through?
 918
 919         case LFUN_INSERT_MATH:
 920                 bv->lockedInsetStoreUndo(Undo::INSERT);
 921                 InsertSymbol(bv, arg);
 922                 break;
 923
 924
 925         case LFUN_INSERT_MATRIX:
 926         {
 927                 bv->lockedInsetStoreUndo(Undo::INSERT);
 928                 int k, m, n;
 929                 char s[80], arg2[80];
 930                                 // This is just so that too long args won't ooze out of s.
 931                 strncpy(arg2, arg.c_str(), 80); arg2[79]= '\0';
 932                 k = sscanf(arg2, "%d %d %s", &m, &n, s);
 933                 s[79] = '\0';
 934
 935                 if (k < 1) {
 936                         m = n = 1;
 937                 } else if (k == 1) {
 938                         n = 1;
 939                 }
 940
 941                 MathMatrixInset * p = new MathMatrixInset(m, n);
 942                 if (mathcursor && p) {
 943                         if (k > 2 && int(strlen(s)) > m)
 944                                 p->SetAlign(s[0], &s[1]);
 945                         mathcursor->insertInset(p, LM_TC_ACTIVE_INSET);
 946                         UpdateLocal(bv);
 947                 }
 948                 break;
 949         }
 950
 951         case LFUN_MATH_DELIM:
 952         {
 953                 bv->lockedInsetStoreUndo(Undo::INSERT);
 954                 char lf[40], rg[40], arg2[40];
 955                 int ilf = '(', irg = '.';
 956                 latexkeys const * l;
 957                 string vdelim("(){}[]./|");
 958
 959                 if (arg.empty())
 960                         break;
 961                 ::strncpy(arg2, arg.c_str(), 40);
 962                 arg2[39]= '\0';
 963                 int n = sscanf(arg2, "%s %s", lf, rg);
 964                 lf[39] = '\0';
 965                 rg[39] = '\0';
 966
 967                 if (n > 0) {
 968                         if (isdigit(lf[0]))
 969                                 ilf = lyx::atoi(lf);
 970                         else
 971                                 if (lf[1]) {
 972                                         l = in_word_set(lf, strlen(lf));
 973                                         // Long words will cause l == 0; so check.
 974                                         if (l)
 975                                                 ilf = l->id;
 976                                 } else if (vdelim.find(lf[0]) != string::npos)
 977                                         ilf = lf[0];
 978
 979                         if (n > 1) {
 980                                 if (isdigit(rg[0]))
 981                                         irg = lyx::atoi(rg);
 982                                 else
 983                                         if (rg[1]) {
 984                                                 l = in_word_set(rg, strlen(rg));
 985                                                 if (l)
 986                                                         irg = l->id;
 987                                         } else if (vdelim.find(rg[0]) != string::npos)
 988                                                 irg = rg[0];
 989                         }
 990                 }
 991
 992                 MathDelimInset * p = new MathDelimInset(ilf, irg);
 993                 mathcursor->insertInset(p, LM_TC_ACTIVE_INSET);
 994                 UpdateLocal(bv);
 995                 break;
 996         }
 997
 998         case LFUN_PROTECTEDSPACE:
 999                 bv->lockedInsetStoreUndo(Undo::INSERT);
1000                 sp = new MathSpaceInset(1);
1001                 mathcursor->insertInset(sp, LM_TC_INSET);
1002                 space_on = true;
1003                 UpdateLocal(bv);
1004                 break;
1005
1006         case LFUN_INSERT_LABEL:
1007         {
1008                 bv->lockedInsetStoreUndo(Undo::INSERT);
1009                 if (par->GetType() < LM_OT_PAR)
1010                         break;
1011
1012                 string old_label = is_multiline(par->GetType())
1013                         ? mathcursor->getLabel() : label;
1014
1015 #warning This is a terrible hack! We should find a better solution.
1016                 // This is needed because in some positions
1017                 // mathcursor->cursor->crow is equal to 0, and therefore
1018                 // the label cannot be inserted.
1019                 // So we move the cursor left until
1020                 // mathcursor->cursor->crow != 0.
1021                 while (old_label == MathedXIter::error_label) {
1022                         if (LocalDispatch(bv, LFUN_LEFT, string()) == FINISHED)
1023                                 return DISPATCHED;
1024                         old_label = mathcursor->getLabel();
1025                 }
1026
1027                 string new_label = arg;
1028                 if (new_label.empty()) {
1029                         string default_label = (lyxrc.label_init_length >= 0) ? "eq:" : "";
1030                         pair<bool, string> res = old_label.empty()
1031                                 ? askForText(_("Enter new label to insert:"), default_label)
1032                                 : askForText(_("Enter label:"), old_label);
1033                         if (!res.first)
1034                                 break;
1035                         new_label = frontStrip(strip(res.second));
1036                 }
1037
1038                 if (new_label == old_label)
1039                         break;  // Nothing to do
1040
1041                 if (!new_label.empty())
1042                         SetNumber(true);
1043
1044                 if (!new_label.empty() && bv->ChangeRefsIfUnique(old_label, new_label))
1045                         bv->redraw();
1046
1047                 if (is_multi_numbered(par->GetType())) {
1048                         mathcursor->setLabel(new_label);
1049                         // MathMatrixInset *mt = (MathMatrixInset*)par;
1050                         // mt->SetLabel(new_label);
1051                 } else
1052                         label = new_label;
1053
1054                 UpdateLocal(bv);
1055                 break;
1056         }
1057
1058         case LFUN_MATH_DISPLAY:
1059                 bv->lockedInsetStoreUndo(Undo::EDIT);
1060                 display(!disp_flag);
1061                 UpdateLocal(bv);
1062                 break;
1063
1064                 // Invalid actions under math mode
1065         case LFUN_MATH_MODE:
1066                 if (mathcursor->getLastCode()!= LM_TC_TEXTRM) {
1067                         bv->owner()->getMiniBuffer()->Set(_("math text mode"));
1068                         varcode = LM_TC_TEXTRM;
1069                 } else {
1070                         varcode = LM_TC_VAR;
1071                 }
1072                 mathcursor->setLastCode(varcode);
1073                 break;
1074
1075         case LFUN_UNDO:
1076                 bv->owner()->getMiniBuffer()->Set(_("Invalid action in math mode!"));
1077                 break;
1078
1079                 //------- dummy actions
1080         case LFUN_EXEC_COMMAND:
1081                 bv->owner()->getMiniBuffer()->PrepareForCommand();
1082                 break;
1083
1084         default:
1085                 if ((action == -1  || action == LFUN_SELFINSERT) && !arg.empty())  {
1086                         unsigned char c = arg[0];
1087                         bv->lockedInsetStoreUndo(Undo::INSERT);
1088
1089                         if (c == ' ' && mathcursor->getAccent() == LM_hat) {
1090                                 c = '^';
1091                                 mathcursor->setAccent(0);
1092                         }
1093
1094                         if (c == 0) {      // Dead key, do nothing
1095                                 //lyxerr << "deadkey" << endl;
1096                                 break;
1097                         }
1098
1099                         if (isalpha(c)) {
1100                                 if (mathcursor->getLastCode() == LM_TC_TEX) {
1101                                         mathcursor->MacroModeOpen();
1102                                         mathcursor->clearLastCode();
1103                                         varcode = LM_TC_MIN;
1104                                 } else if (!varcode) {
1105                                         short f = (mathcursor->getLastCode()) ?
1106                                                 mathcursor->getLastCode() :
1107                                                 static_cast<MathedTextCodes>(mathcursor->GetFCode());
1108                                         varcode = MathIsAlphaFont(f) ?
1109                                                 static_cast<MathedTextCodes>(f) :
1110                                                 LM_TC_VAR;
1111                                 }
1112
1113                                 //           lyxerr << "Varcode << vardoce;
1114                                 MathedTextCodes char_code = varcode;
1115                                 if (greek_kb_flag) {
1116                                         char greek[26] =
1117                                         {'A', 'B', 'X',  0 , 'E',  0 ,  0 , 'H', 'I',  0 ,
1118                                          'K',  0 , 'M', 'N', 'O',  0 ,  0 , 'P',  0 , 'T',
1119                                          'Y',  0,   0,   0,   0 , 'Z' };
1120
1121                                         if ('A' <= c && c <= 'Z' && greek[c - 'A']) {
1122                                                 char_code = LM_TC_RM;
1123                                                 c = greek[c - 'A'];
1124                                         } else
1125                                                 char_code = LM_TC_SYMB;
1126                                 }
1127
1128                                 mathcursor->Insert(c, char_code);
1129
1130                                 if (greek_kb_flag && char_code == LM_TC_RM )
1131                                         mathcursor->setLastCode(LM_TC_VAR);
1132
1133                                 varcode = LM_TC_MIN;
1134
1135                                 if (greek_kb_flag<2)
1136                                         greek_kb_flag = 0;
1137
1138                         } else if (strchr("!,:;{}", c) && (varcode == LM_TC_TEX||was_macro)) {
1139                                 mathcursor->Insert(c, LM_TC_TEX);
1140                                 if (c == '{') {
1141                                         mathcursor->Insert('}', LM_TC_TEX);
1142                                         mathcursor->Left();
1143                                 }
1144                                 mathcursor->clearLastCode();
1145                                 //             varcode = LM_TC_MIN;
1146                         } else if (c == '_' && varcode == LM_TC_TEX) {
1147                                 mathcursor->Insert(c, LM_TC_SPECIAL);
1148                                 mathcursor->clearLastCode();
1149                                 //             varcode = LM_TC_MIN;
1150                         } else if (('0'<= c && c<= '9') && (varcode == LM_TC_TEX||was_macro)) {
1151                                 mathcursor->MacroModeOpen();
1152                                 mathcursor->clearLastCode();
1153                                 mathcursor->Insert(c, LM_TC_MIN);
1154                         } else if (('0'<= c && c<= '9') || strchr(";:!|[]().,?", c)) {
1155                                 mathcursor->Insert(c, LM_TC_CONST);
1156                         } else if (strchr("+/-*<>=", c)) {
1157                                 mathcursor->Insert(c, LM_TC_BOP);
1158                         } else if (strchr(latex_special_chars, c) && c!= '_') {
1159                                 mathcursor->Insert(c, LM_TC_SPECIAL);
1160                         } else if (c == '_' || c == '^') {
1161                                 char s[2];
1162                                 s[0] = c;
1163                                 s[1] = 0;
1164                                 mathcursor->Interpret(s);
1165                         } else if (c == ' ') {
1166                                 if (!varcode) {
1167                                         short f = (mathcursor->getLastCode()) ?
1168                                                 mathcursor->getLastCode() :
1169                                                 static_cast<MathedTextCodes>(mathcursor->GetFCode());
1170                                         varcode = MathIsAlphaFont(f) ?
1171                                                 static_cast<MathedTextCodes>(f) :
1172                                                 LM_TC_VAR;
1173                                 }
1174
1175                                 if (varcode == LM_TC_TEXTRM) {
1176                                         mathcursor->Insert(c, LM_TC_TEXTRM);
1177                                 } else if (was_macro) {
1178                                         mathcursor->MacroModeClose();
1179                                 } else if (sp) {
1180                                         int isp = (sp->GetSpace()<5) ? sp->GetSpace()+1: 0;
1181                                         sp->SetSpace(isp);
1182                                         space_on = true;
1183                                 } else if (!mathcursor->Pop() && mathcursor->IsEnd())
1184                                         result = FINISHED;
1185                         } else if (c == '\'' || c == '@') {
1186                                 mathcursor->Insert (c, LM_TC_VAR);
1187                         } else if (c == '\\') {
1188                                 if (was_macro)
1189                                         mathcursor->MacroModeClose();
1190                                 bv->owner()->getMiniBuffer()->Set(_("TeX mode"));
1191                                 mathcursor->setLastCode(LM_TC_TEX);
1192                         }
1193                         UpdateLocal(bv);
1194                 } else if (action == LFUN_MATH_PANEL) {
1195                         result = UNDISPATCHED;
1196                 } else {
1197                         // lyxerr << "Closed by action " << action << endl;
1198                         result =  FINISHED;
1199                 }
1200         }
1201
1202         if (was_macro != mathcursor->InMacroMode()
1203             && action >= 0
1204             && action != LFUN_BACKSPACE)
1205                 UpdateLocal(bv);
1206
1207         if (sp && !space_on)
1208                 sp = 0;
1209
1210         if (mathcursor->Selection() || was_selection)
1211                 ToggleInsetSelection(bv);
1212
1213         if ((result == DISPATCHED) || (result == DISPATCHED_NOUPDATE) ||
1214             (result == UNDISPATCHED))
1215                 ShowInsetCursor(bv);
1216         else
1217                 bv->unlockInset(this);
1218
1219         return result;
1220 }
1221
1222
1223
1224 static
1225 void mathedValidate(LaTeXFeatures & features, MathParInset * par)
1226 {
1227         MathedIter it(&par->GetData());
1228
1229         while (it.OK() && !(features.binom && features.boldsymbol)) {
1230                 if (it.IsInset()) {
1231                         if (it.IsActive()) {
1232                                 MathParInset * p = it.GetActiveInset();
1233                                 if (!features.binom && p->GetType() == LM_OT_MACRO &&
1234                                     p->GetName() == "binom") {
1235                                         features.binom = true;
1236                                 } else {
1237                                         for (int i = 0; i <= p->getMaxArgumentIdx(); ++i) {
1238                                                 p->setArgumentIdx(i);
1239                                                 mathedValidate(features, p);
1240                                         }
1241                                 }
1242                         } else {
1243                                 MathedInset * p = it.GetInset();
1244                                 if (!features.boldsymbol && p->GetName() == "boldsymbol") {
1245                                         features.boldsymbol = true;
1246                                 }
1247                         }
1248                 }
1249                 it.Next();
1250         }
1251 }
1252
1253
1254 static
1255 int mathed_write(MathParInset * p, ostream & os,
1256                  bool fragile, string const & label)
1257 {
1258         number_of_newlines = 0;
1259         short mathed_env = p->GetType();
1260
1261         if (mathed_env == LM_OT_MIN) {
1262                 if (fragile) os << "\\protect";
1263                 os << "\\( "; // changed from " \\( " (Albrecht Dress)
1264         } else {
1265                 if (mathed_env == LM_OT_PAR){
1266                         os << "\\[\n";
1267                 } else {
1268                         os << "\\begin{"
1269                            << latex_mathenv[mathed_env]
1270                            << "}";
1271                         if (is_multicolumn(mathed_env)) {
1272                                 if (mathed_env != LM_OT_ALIGNAT
1273                                     && mathed_env != LM_OT_ALIGNATN)
1274                                         os << "%";
1275                                 os << "{" << p->GetColumns()/2 << "}";
1276                         }
1277                         os << "\n";
1278                 }
1279                 ++number_of_newlines;
1280         }
1281
1282         if (!label.empty() && label[0] > ' '
1283             && is_singlely_numbered(mathed_env)) {
1284                 os << "\\label{"
1285                    << label
1286                    << "}\n";
1287                 ++number_of_newlines;
1288         }
1289
1290         p->Write(os, fragile);
1291
1292         if (mathed_env == LM_OT_MIN){
1293                 if (fragile) os << "\\protect";
1294                 os << " \\)";
1295         } else if (mathed_env == LM_OT_PAR) {
1296                 os << "\\]\n";
1297                 ++number_of_newlines;
1298         } else {
1299                 os << "\n\\end{"
1300                    << latex_mathenv[mathed_env]
1301                    << "}\n";
1302                 number_of_newlines += 2;
1303         }
1304         return number_of_newlines;
1305 }