src/mathed/InsetMathNest.C

   1 /**
   2  * \file InsetMathNest.C
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * \author André Pönitz
   7  *
   8  * Full author contact details are available in file CREDITS.
   9  */
  10
  11 #include <config.h>
  12
  13 #include "InsetMathNest.h"
  14
  15 #include "InsetMathArray.h"
  16 #include "InsetMathBig.h"
  17 #include "InsetMathBox.h"
  18 #include "InsetMathBrace.h"
  19 #include "InsetMathColor.h"
  20 #include "InsetMathComment.h"
  21 #include "MathData.h"
  22 #include "InsetMathDelim.h"
  23 #include "MathFactory.h"
  24 #include "InsetMathHull.h"
  25 #include "MathMLStream.h"
  26 #include "MathMacroArgument.h"
  27 //#include "InsetMathMBox.h"
  28 #include "MathParser.h"
  29 #include "InsetMathScript.h"
  30 #include "InsetMathSpace.h"
  31 #include "InsetMathSymbol.h"
  32 #include "MathSupport.h"
  33 #include "InsetMathUnknown.h"
  34 #include "InsetMathRef.h"
  35
  36 #include "BufferView.h"
  37 #include "CutAndPaste.h"
  38 #include "FuncStatus.h"
  39 #include "LColor.h"
  40 #include "bufferview_funcs.h"
  41 #include "coordcache.h"
  42 #include "cursor.h"
  43 #include "debug.h"
  44 #include "dispatchresult.h"
  45 #include "funcrequest.h"
  46 #include "gettext.h"
  47 #include "outputparams.h"
  48 #include "undo.h"
  49
  50 #include "support/lstrings.h"
  51
  52 #include "frontends/Application.h"
  53 #include "frontends/Painter.h"
  54 #include "frontends/Selection.h"
  55 #include "frontends/nullpainter.h"
  56
  57 #include <sstream>
  58
  59 using lyx::cap::copySelection;
  60 using lyx::cap::grabAndEraseSelection;
  61 using lyx::cap::cutSelection;
  62 using lyx::cap::replaceSelection;
  63 using lyx::cap::selClearOrDel;
  64
  65 using lyx::frontend::Clipboard;
  66
  67 using std::endl;
  68 using std::string;
  69 using std::istringstream;
  70
  71
  72 InsetMathNest::InsetMathNest(idx_type nargs)
  73         : cells_(nargs), lock_(false)
  74 {}
  75
  76
  77 InsetMath::idx_type InsetMathNest::nargs() const
  78 {
  79         return cells_.size();
  80 }
  81
  82
  83 MathArray & InsetMathNest::cell(idx_type i)
  84 {
  85         return cells_[i];
  86 }
  87
  88
  89 MathArray const & InsetMathNest::cell(idx_type i) const
  90 {
  91         return cells_[i];
  92 }
  93
  94
  95 void InsetMathNest::cursorPos(CursorSlice const & sl, bool /*boundary*/,
  96         int & x, int & y) const
  97 {
  98 // FIXME: This is a hack. Ideally, the coord cache should not store
  99 // absolute positions, but relative ones. This would mean to call
 100 // setXY() not in MathArray::draw(), but in the parent insets' draw()
 101 // with the correctly adjusted x,y values. But this means that we'd have
 102 // to touch all (math)inset's draw() methods. Right now, we'll store
 103 // absolute value, and make them here relative, only to make them
 104 // absolute again when actually drawing the cursor. What a mess.
 105         BOOST_ASSERT(ptr_cmp(&sl.inset(), this));
 106         MathArray const & ar = sl.cell();
 107         if (!theCoords.getArrays().has(&ar)) {
 108                 // this can (semi-)legally happen if we just created this cell
 109                 // and it never has been drawn before. So don't ASSERT.
 110                 //lyxerr << "no cached data for array " << &ar << endl;
 111                 x = 0;
 112                 y = 0;
 113                 return;
 114         }
 115         Point const pt = theCoords.getArrays().xy(&ar);
 116         if (!theCoords.getInsets().has(this)) {
 117                 // same as above
 118                 //lyxerr << "no cached data for inset " << this << endl;
 119                 x = 0;
 120                 y = 0;
 121                 return;
 122         }
 123         Point const pt2 = theCoords.getInsets().xy(this);
 124         //lyxerr << "retrieving position cache for MathArray "
 125         //      << pt.x_ << ' ' << pt.y_ << std::endl;
 126         x = pt.x_ - pt2.x_ + ar.pos2x(sl.pos());
 127         y = pt.y_ - pt2.y_;
 128 //      lyxerr << "pt.y_ : " << pt.y_ << " pt2_.y_ : " << pt2.y_
 129 //              << " asc: " << ascent() << "  des: " << descent()
 130 //              << " ar.asc: " << ar.ascent() << " ar.des: " << ar.descent() << endl;
 131         // move cursor visually into empty cells ("blue rectangles");
 132         if (ar.empty())
 133                 x += 2;
 134 }
 135
 136
 137 void InsetMathNest::metrics(MetricsInfo const & mi) const
 138 {
 139         MetricsInfo m = mi;
 140         for (idx_type i = 0, n = nargs(); i != n; ++i)
 141                 cell(i).metrics(m);
 142 }
 143
 144
 145 bool InsetMathNest::idxNext(LCursor & cur) const
 146 {
 147         BOOST_ASSERT(ptr_cmp(&cur.inset(), this));
 148         if (cur.idx() == cur.lastidx())
 149                 return false;
 150         ++cur.idx();
 151         cur.pos() = 0;
 152         return true;
 153 }
 154
 155
 156 bool InsetMathNest::idxRight(LCursor & cur) const
 157 {
 158         return idxNext(cur);
 159 }
 160
 161
 162 bool InsetMathNest::idxPrev(LCursor & cur) const
 163 {
 164         BOOST_ASSERT(ptr_cmp(&cur.inset(), this));
 165         if (cur.idx() == 0)
 166                 return false;
 167         --cur.idx();
 168         cur.pos() = cur.lastpos();
 169         return true;
 170 }
 171
 172
 173 bool InsetMathNest::idxLeft(LCursor & cur) const
 174 {
 175         return idxPrev(cur);
 176 }
 177
 178
 179 bool InsetMathNest::idxFirst(LCursor & cur) const
 180 {
 181         BOOST_ASSERT(ptr_cmp(&cur.inset(), this));
 182         if (nargs() == 0)
 183                 return false;
 184         cur.idx() = 0;
 185         cur.pos() = 0;
 186         return true;
 187 }
 188
 189
 190 bool InsetMathNest::idxLast(LCursor & cur) const
 191 {
 192         BOOST_ASSERT(ptr_cmp(&cur.inset(), this));
 193         if (nargs() == 0)
 194                 return false;
 195         cur.idx() = cur.lastidx();
 196         cur.pos() = cur.lastpos();
 197         return true;
 198 }
 199
 200
 201 void InsetMathNest::dump() const
 202 {
 203         WriteStream os(lyxerr);
 204         os << "---------------------------------------------\n";
 205         write(os);
 206         os << "\n";
 207         for (idx_type i = 0, n = nargs(); i != n; ++i)
 208                 os << cell(i) << "\n";
 209         os << "---------------------------------------------\n";
 210 }
 211
 212
 213 void InsetMathNest::draw(PainterInfo & pi, int x, int y) const
 214 {
 215 #if 0
 216         if (lock_)
 217                 pi.pain.fillRectangle(x, y - ascent(), width(), height(),
 218                                         LColor::mathlockbg);
 219 #endif
 220         setPosCache(pi, x, y);
 221 }
 222
 223
 224 void InsetMathNest::drawSelection(PainterInfo & pi, int x, int y) const
 225 {
 226         // this should use the x/y values given, not the cached values
 227         LCursor & cur = pi.base.bv->cursor();
 228         if (!cur.selection())
 229                 return;
 230         if (!ptr_cmp(&cur.inset(), this))
 231                 return;
 232
 233         // FIXME: hack to get position cache warm
 234         static lyx::frontend::NullPainter nop;
 235         PainterInfo pinop(pi);
 236         pinop.pain = nop;
 237         draw(pinop, x, y);
 238
 239         CursorSlice s1 = cur.selBegin();
 240         CursorSlice s2 = cur.selEnd();
 241         //lyxerr << "InsetMathNest::drawing selection: "
 242         //      << " s1: " << s1 << " s2: " << s2 << endl;
 243         if (s1.idx() == s2.idx()) {
 244                 MathArray const & c = cell(s1.idx());
 245                 int x1 = c.xo() + c.pos2x(s1.pos());
 246                 int y1 = c.yo() - c.ascent();
 247                 int x2 = c.xo() + c.pos2x(s2.pos());
 248                 int y2 = c.yo() + c.descent();
 249                 pi.pain.fillRectangle(x1, y1, x2 - x1, y2 - y1, LColor::selection);
 250         //lyxerr << "InsetMathNest::drawing selection 3: "
 251         //      << " x1: " << x1 << " x2: " << x2
 252         //      << " y1: " << y1 << " y2: " << y2 << endl;
 253         } else {
 254                 for (idx_type i = 0; i < nargs(); ++i) {
 255                         if (idxBetween(i, s1.idx(), s2.idx())) {
 256                                 MathArray const & c = cell(i);
 257                                 int x1 = c.xo();
 258                                 int y1 = c.yo() - c.ascent();
 259                                 int x2 = c.xo() + c.width();
 260                                 int y2 = c.yo() + c.descent();
 261                                 pi.pain.fillRectangle(x1, y1, x2 - x1, y2 - y1, LColor::selection);
 262                         }
 263                 }
 264         }
 265 }
 266
 267
 268 void InsetMathNest::validate(LaTeXFeatures & features) const
 269 {
 270         for (idx_type i = 0; i < nargs(); ++i)
 271                 cell(i).validate(features);
 272 }
 273
 274
 275 void InsetMathNest::replace(ReplaceData & rep)
 276 {
 277         for (idx_type i = 0; i < nargs(); ++i)
 278                 cell(i).replace(rep);
 279 }
 280
 281
 282 bool InsetMathNest::contains(MathArray const & ar) const
 283 {
 284         for (idx_type i = 0; i < nargs(); ++i)
 285                 if (cell(i).contains(ar))
 286                         return true;
 287         return false;
 288 }
 289
 290
 291 bool InsetMathNest::lock() const
 292 {
 293         return lock_;
 294 }
 295
 296
 297 void InsetMathNest::lock(bool l)
 298 {
 299         lock_ = l;
 300 }
 301
 302
 303 bool InsetMathNest::isActive() const
 304 {
 305         return nargs() > 0;
 306 }
 307
 308
 309 MathArray InsetMathNest::glue() const
 310 {
 311         MathArray ar;
 312         for (size_t i = 0; i < nargs(); ++i)
 313                 ar.append(cell(i));
 314         return ar;
 315 }
 316
 317
 318 void InsetMathNest::write(WriteStream & os) const
 319 {
 320         os << '\\' << name().c_str();
 321         for (size_t i = 0; i < nargs(); ++i)
 322                 os << '{' << cell(i) << '}';
 323         if (nargs() == 0)
 324                 os.pendingSpace(true);
 325         if (lock_ && !os.latex()) {
 326                 os << "\\lyxlock";
 327                 os.pendingSpace(true);
 328         }
 329 }
 330
 331
 332 void InsetMathNest::normalize(NormalStream & os) const
 333 {
 334         os << '[' << name().c_str();
 335         for (size_t i = 0; i < nargs(); ++i)
 336                 os << ' ' << cell(i);
 337         os << ']';
 338 }
 339
 340
 341 int InsetMathNest::latex(Buffer const &, std::ostream & os,
 342                         OutputParams const & runparams) const
 343 {
 344         WriteStream wi(os, runparams.moving_arg, true);
 345         write(wi);
 346         return wi.line();
 347 }
 348
 349
 350 bool InsetMathNest::notifyCursorLeaves(LCursor & /*cur*/)
 351 {
 352 #ifdef WITH_WARNINGS
 353 #warning look here
 354 #endif
 355 #if 0
 356         MathArray & ar = cur.cell();
 357         // remove base-only "scripts"
 358         for (pos_type i = 0; i + 1 < ar.size(); ++i) {
 359                 InsetMathScript * p = operator[](i).nucleus()->asScriptInset();
 360                 if (p && p->nargs() == 1) {
 361                         MathArray ar = p->nuc();
 362                         erase(i);
 363                         insert(i, ar);
 364                         cur.adjust(i, ar.size() - 1);
 365                 }
 366         }
 367
 368         // glue adjacent font insets of the same kind
 369         for (pos_type i = 0; i + 1 < size(); ++i) {
 370                 InsetMathFont * p = operator[](i).nucleus()->asFontInset();
 371                 InsetMathFont const * q = operator[](i + 1)->asFontInset();
 372                 if (p && q && p->name() == q->name()) {
 373                         p->cell(0).append(q->cell(0));
 374                         erase(i + 1);
 375                         cur.adjust(i, -1);
 376                 }
 377         }
 378 #endif
 379         return false;
 380 }
 381
 382
 383 void InsetMathNest::handleFont
 384         (LCursor & cur, string const & arg, string const & font)
 385 {
 386         // this whole function is a hack and won't work for incremental font
 387         // changes...
 388         recordUndo(cur, Undo::ATOMIC);
 389
 390         if (cur.inset().asInsetMath()->name() == font)
 391                 cur.handleFont(font);
 392         else {
 393                 cur.handleNest(createInsetMath(font));
 394                 cur.insert(arg);
 395         }
 396 }
 397
 398
 399 void InsetMathNest::handleFont2(LCursor & cur, string const & arg)
 400 {
 401         recordUndo(cur, Undo::ATOMIC);
 402         LyXFont font;
 403         bool b;
 404         bv_funcs::string2font(arg, font, b);
 405         if (font.color() != LColor::inherit) {
 406                 MathAtom at = MathAtom(new InsetMathColor(true, font.color()));
 407                 cur.handleNest(at, 0);
 408         }
 409 }
 410
 411
 412 void InsetMathNest::doDispatch(LCursor & cur, FuncRequest & cmd)
 413 {
 414         //lyxerr << "InsetMathNest: request: " << cmd << std::endl;
 415         //CursorSlice sl = cur.current();
 416
 417         switch (cmd.action) {
 418
 419         case LFUN_PASTE: {
 420                 recordUndo(cur);
 421                 cur.message(_("Paste"));
 422                 replaceSelection(cur);
 423                 size_t n = 0;
 424                 istringstream is(lyx::to_utf8(cmd.argument()));
 425                 is >> n;
 426                 string const selection = lyx::cap::getSelection(cur.buffer(), n);
 427                 cur.niceInsert(selection);
 428                 cur.clearSelection(); // bug 393
 429                 cur.bv().switchKeyMap();
 430                 finishUndo();
 431                 break;
 432         }
 433
 434         case LFUN_CUT:
 435                 recordUndo(cur);
 436                 cutSelection(cur, true, true);
 437                 cur.message(_("Cut"));
 438                 // Prevent stale position >= size crash
 439                 // Probably not necessary anymore, see eraseSelection (gb 2005-10-09)
 440                 cur.normalize();
 441                 break;
 442
 443         case LFUN_COPY:
 444                 copySelection(cur);
 445                 // FIXME UNICODE
 446                 cur.message(_("Copy"));
 447                 break;
 448
 449         case LFUN_MOUSE_PRESS:
 450                 lfunMousePress(cur, cmd);
 451                 break;
 452
 453         case LFUN_MOUSE_MOTION:
 454                 lfunMouseMotion(cur, cmd);
 455                 break;
 456
 457         case LFUN_MOUSE_RELEASE:
 458                 lfunMouseRelease(cur, cmd);
 459                 break;
 460
 461         case LFUN_FINISHED_LEFT:
 462                 cur.bv().cursor() = cur;
 463                 break;
 464
 465         case LFUN_FINISHED_RIGHT:
 466                 ++cur.pos();
 467                 cur.bv().cursor() = cur;
 468                 break;
 469
 470         case LFUN_FINISHED_UP:
 471                 cur.bv().cursor() = cur;
 472                 break;
 473
 474         case LFUN_FINISHED_DOWN:
 475                 ++cur.pos();
 476                 cur.bv().cursor() = cur;
 477                 break;
 478
 479         case LFUN_CHAR_FORWARD_SELECT:
 480         case LFUN_CHAR_FORWARD:
 481                 cur.selHandle(cmd.action == LFUN_CHAR_FORWARD_SELECT);
 482                 cur.autocorrect() = false;
 483                 cur.clearTargetX();
 484                 cur.macroModeClose();
 485                 if (cur.pos() != cur.lastpos() && cur.openable(cur.nextAtom())) {
 486                         cur.pushLeft(*cur.nextAtom().nucleus());
 487                         cur.inset().idxFirst(cur);
 488                 } else if (cur.posRight() || idxRight(cur)
 489                         || cur.popRight() || cur.selection())
 490                         ;
 491                 else {
 492                         cmd = FuncRequest(LFUN_FINISHED_RIGHT);
 493                         cur.undispatched();
 494                 }
 495                 break;
 496
 497         case LFUN_CHAR_BACKWARD_SELECT:
 498         case LFUN_CHAR_BACKWARD:
 499                 cur.selHandle(cmd.action == LFUN_CHAR_BACKWARD_SELECT);
 500                 cur.autocorrect() = false;
 501                 cur.clearTargetX();
 502                 cur.macroModeClose();
 503                 if (cur.pos() != 0 && cur.openable(cur.prevAtom())) {
 504                         cur.posLeft();
 505                         cur.push(*cur.nextAtom().nucleus());
 506                         cur.inset().idxLast(cur);
 507                 } else if (cur.posLeft() || idxLeft(cur)
 508                         || cur.popLeft() || cur.selection())
 509                         ;
 510                 else {
 511                         cmd = FuncRequest(LFUN_FINISHED_LEFT);
 512                         cur.undispatched();
 513                 }
 514                 break;
 515
 516         case LFUN_UP_SELECT:
 517         case LFUN_UP:
 518                 // FIXME Tried to use clearTargetX and macroModeClose, crashed on cur.up()
 519                 if (cur.inMacroMode()) {
 520                         // Make Helge happy
 521                         cur.macroModeClose();
 522                         break;
 523                 }
 524                 cur.selHandle(cmd.action == LFUN_UP_SELECT);
 525                 if (!cur.up()) {
 526                         cmd = FuncRequest(LFUN_FINISHED_UP);
 527                         cur.undispatched();
 528                 }
 529                 // fixes bug 1598. Please check!
 530                 cur.normalize();
 531                 break;
 532
 533         case LFUN_DOWN_SELECT:
 534         case LFUN_DOWN:
 535                 if (cur.inMacroMode()) {
 536                         cur.macroModeClose();
 537                         break;
 538                 }
 539                 cur.selHandle(cmd.action == LFUN_DOWN_SELECT);
 540                 if (!cur.down()) {
 541                         cmd = FuncRequest(LFUN_FINISHED_DOWN);
 542                         cur.undispatched();
 543                 }
 544                 // fixes bug 1598. Please check!
 545                 cur.normalize();
 546                 break;
 547
 548         case LFUN_MOUSE_DOUBLE:
 549         case LFUN_MOUSE_TRIPLE:
 550         case LFUN_WORD_SELECT:
 551                 cur.pos() = 0;
 552                 cur.idx() = 0;
 553                 cur.resetAnchor();
 554                 cur.selection() = true;
 555                 cur.pos() = cur.lastpos();
 556                 cur.idx() = cur.lastidx();
 557                 break;
 558
 559         case LFUN_PARAGRAPH_UP_SELECT:
 560         case LFUN_PARAGRAPH_UP:
 561         case LFUN_PARAGRAPH_DOWN_SELECT:
 562         case LFUN_PARAGRAPH_DOWN:
 563                 break;
 564
 565         case LFUN_LINE_BEGIN_SELECT:
 566         case LFUN_LINE_BEGIN:
 567         case LFUN_WORD_BACKWARD_SELECT:
 568         case LFUN_WORD_BACKWARD:
 569                 cur.selHandle(cmd.action == LFUN_WORD_BACKWARD_SELECT ||
 570                                 cmd.action == LFUN_LINE_BEGIN_SELECT);
 571                 cur.macroModeClose();
 572                 if (cur.pos() != 0) {
 573                         cur.pos() = 0;
 574                 } else if (cur.col() != 0) {
 575                         cur.idx() -= cur.col();
 576                         cur.pos() = 0;
 577                 } else if (cur.idx() != 0) {
 578                         cur.idx() = 0;
 579                         cur.pos() = 0;
 580                 } else {
 581                         cmd = FuncRequest(LFUN_FINISHED_LEFT);
 582                         cur.undispatched();
 583                 }
 584                 break;
 585
 586         case LFUN_WORD_FORWARD_SELECT:
 587         case LFUN_WORD_FORWARD:
 588         case LFUN_LINE_END_SELECT:
 589         case LFUN_LINE_END:
 590                 cur.selHandle(cmd.action == LFUN_WORD_FORWARD_SELECT ||
 591                                 cmd.action == LFUN_LINE_END_SELECT);
 592                 cur.macroModeClose();
 593                 cur.clearTargetX();
 594                 if (cur.pos() != cur.lastpos()) {
 595                         cur.pos() = cur.lastpos();
 596                 } else if (ncols() && (cur.col() != cur.lastcol())) {
 597                         cur.idx() = cur.idx() - cur.col() + cur.lastcol();
 598                         cur.pos() = cur.lastpos();
 599                 } else if (cur.idx() != cur.lastidx()) {
 600                         cur.idx() = cur.lastidx();
 601                         cur.pos() = cur.lastpos();
 602                 } else {
 603                         cmd = FuncRequest(LFUN_FINISHED_RIGHT);
 604                         cur.undispatched();
 605                 }
 606                 break;
 607
 608         case LFUN_SCREEN_UP_SELECT:
 609         case LFUN_SCREEN_UP:
 610                 cmd = FuncRequest(LFUN_FINISHED_LEFT);
 611                 cur.undispatched();
 612                 break;
 613
 614         case LFUN_SCREEN_DOWN_SELECT:
 615         case LFUN_SCREEN_DOWN:
 616                 cmd = FuncRequest(LFUN_FINISHED_RIGHT);
 617                 cur.undispatched();
 618                 break;
 619
 620         case LFUN_CELL_FORWARD:
 621                 cur.inset().idxNext(cur);
 622                 break;
 623
 624         case LFUN_CELL_BACKWARD:
 625                 cur.inset().idxPrev(cur);
 626                 break;
 627
 628         case LFUN_WORD_DELETE_BACKWARD:
 629         case LFUN_CHAR_DELETE_BACKWARD:
 630                 if (cur.pos() == 0)
 631                         // May affect external cell:
 632                         recordUndoInset(cur, Undo::ATOMIC);
 633                 else
 634                         recordUndo(cur, Undo::ATOMIC);
 635                 cur.backspace();
 636                 break;
 637
 638         case LFUN_WORD_DELETE_FORWARD:
 639         case LFUN_CHAR_DELETE_FORWARD:
 640                 if (cur.pos() == cur.lastpos())
 641                         // May affect external cell:
 642                         recordUndoInset(cur, Undo::ATOMIC);
 643                 else
 644                         recordUndo(cur, Undo::ATOMIC);
 645                 cur.erase();
 646                 break;
 647
 648         case LFUN_ESCAPE:
 649                 if (cur.selection())
 650                         cur.clearSelection();
 651                 else  {
 652                         cmd = FuncRequest(LFUN_FINISHED_RIGHT);
 653                         cur.undispatched();
 654                 }
 655                 break;
 656
 657         case LFUN_INSET_TOGGLE:
 658                 recordUndo(cur);
 659                 lock(!lock());
 660                 cur.popRight();
 661                 break;
 662
 663         case LFUN_SELF_INSERT:
 664                 if (cmd.argument().size() != 1) {
 665                         recordUndo(cur);
 666                         string const arg = lyx::to_utf8(cmd.argument());
 667                         if (!interpret(cur, arg))
 668                                 cur.insert(arg);
 669                         break;
 670                 }
 671                 // Don't record undo steps if we are in macro mode and
 672                 // cmd.argument is the next character of the macro name.
 673                 // Otherwise we'll get an invalid cursor if we undo after
 674                 // the macro was finished and the macro is a known command,
 675                 // e.g. sqrt. LCursor::macroModeClose replaces in this case
 676                 // the InsetMathUnknown with name "frac" by an empty
 677                 // InsetMathFrac -> a pos value > 0 is invalid.
 678                 // A side effect is that an undo before the macro is finished
 679                 // undoes the complete macro, not only the last character.
 680                 if (!cur.inMacroMode())
 681                         recordUndo(cur);
 682
 683                 // spacial handling of space. If we insert an inset
 684                 // via macro mode, we want to put the cursor inside it
 685                 // if relevant. Think typing "\frac<space>".
 686                 if (cmd.argument()[0] == ' '
 687                     && cur.inMacroMode() && cur.macroName() != "\\"
 688                     && cur.macroModeClose()) {
 689                         MathAtom const atom = cur.prevAtom();
 690                         if (atom->asNestInset() && atom->nargs() > 0) {
 691                                 cur.posLeft();
 692                                 cur.pushLeft(*cur.nextInset());
 693                         }
 694                 // FIXME: Change to
 695                 // } else if (!interpret(cur, cmd.argument()[0])) {
 696                 // when interpret accepts UCS4 characters
 697                 } else if (!interpret(cur, lyx::to_utf8(cmd.argument()))) {
 698                         cmd = FuncRequest(LFUN_FINISHED_RIGHT);
 699                         cur.undispatched();
 700                 }
 701                 break;
 702
 703         //case LFUN_SERVER_GET_XY:
 704         //      sprintf(dispatch_buffer, "%d %d",);
 705         //      break;
 706
 707         case LFUN_SERVER_SET_XY: {
 708                 lyxerr << "LFUN_SERVER_SET_XY broken!" << endl;
 709                 int x = 0;
 710                 int y = 0;
 711                 istringstream is(lyx::to_utf8(cmd.argument()));
 712                 is >> x >> y;
 713                 cur.setScreenPos(x, y);
 714                 break;
 715         }
 716
 717         // Special casing for superscript in case of LyX handling
 718         // dead-keys:
 719         case LFUN_ACCENT_CIRCUMFLEX:
 720                 if (cmd.argument().empty()) {
 721                         // do superscript if LyX handles
 722                         // deadkeys
 723                         recordUndo(cur, Undo::ATOMIC);
 724                         script(cur, true, grabAndEraseSelection(cur));
 725                 }
 726                 break;
 727
 728         case LFUN_ACCENT_UMLAUT:
 729         case LFUN_ACCENT_ACUTE:
 730         case LFUN_ACCENT_GRAVE:
 731         case LFUN_ACCENT_BREVE:
 732         case LFUN_ACCENT_DOT:
 733         case LFUN_ACCENT_MACRON:
 734         case LFUN_ACCENT_CARON:
 735         case LFUN_ACCENT_TILDE:
 736         case LFUN_ACCENT_CEDILLA:
 737         case LFUN_ACCENT_CIRCLE:
 738         case LFUN_ACCENT_UNDERDOT:
 739         case LFUN_ACCENT_TIE:
 740         case LFUN_ACCENT_OGONEK:
 741         case LFUN_ACCENT_HUNGARIAN_UMLAUT:
 742                 break;
 743
 744         //  Math fonts
 745         case LFUN_FONT_FREE_APPLY:
 746         case LFUN_FONT_FREE_UPDATE:
 747                 handleFont2(cur, lyx::to_utf8(cmd.argument()));
 748                 break;
 749
 750         case LFUN_FONT_BOLD:
 751                 if (currentMode() == TEXT_MODE)
 752                         handleFont(cur, lyx::to_utf8(cmd.argument()), "textbf");
 753                 else
 754                         handleFont(cur, lyx::to_utf8(cmd.argument()), "mathbf");
 755                 break;
 756         case LFUN_FONT_SANS:
 757                 if (currentMode() == TEXT_MODE)
 758                         handleFont(cur, lyx::to_utf8(cmd.argument()), "textsf");
 759                 else
 760                         handleFont(cur, lyx::to_utf8(cmd.argument()), "mathsf");
 761                 break;
 762         case LFUN_FONT_EMPH:
 763                 if (currentMode() == TEXT_MODE)
 764                         handleFont(cur, lyx::to_utf8(cmd.argument()), "emph");
 765                 else
 766                         handleFont(cur, lyx::to_utf8(cmd.argument()), "mathcal");
 767                 break;
 768         case LFUN_FONT_ROMAN:
 769                 if (currentMode() == TEXT_MODE)
 770                         handleFont(cur, lyx::to_utf8(cmd.argument()), "textrm");
 771                 else
 772                         handleFont(cur, lyx::to_utf8(cmd.argument()), "mathrm");
 773                 break;
 774         case LFUN_FONT_CODE:
 775                 if (currentMode() == TEXT_MODE)
 776                         handleFont(cur, lyx::to_utf8(cmd.argument()), "texttt");
 777                 else
 778                         handleFont(cur, lyx::to_utf8(cmd.argument()), "mathtt");
 779                 break;
 780         case LFUN_FONT_FRAK:
 781                 handleFont(cur, lyx::to_utf8(cmd.argument()), "mathfrak");
 782                 break;
 783         case LFUN_FONT_ITAL:
 784                 if (currentMode() == TEXT_MODE)
 785                         handleFont(cur, lyx::to_utf8(cmd.argument()), "textit");
 786                 else
 787                         handleFont(cur, lyx::to_utf8(cmd.argument()), "mathit");
 788                 break;
 789         case LFUN_FONT_NOUN:
 790                 if (currentMode() == TEXT_MODE)
 791                         // FIXME: should be "noun"
 792                         handleFont(cur, lyx::to_utf8(cmd.argument()), "textsc");
 793                 else
 794                         handleFont(cur, lyx::to_utf8(cmd.argument()), "mathbb");
 795                 break;
 796         //case LFUN_FONT_FREE_APPLY:
 797                 handleFont(cur, lyx::to_utf8(cmd.argument()), "textrm");
 798                 break;
 799         case LFUN_FONT_DEFAULT:
 800                 handleFont(cur, lyx::to_utf8(cmd.argument()), "textnormal");
 801                 break;
 802
 803         case LFUN_MATH_MODE: {
 804 #if 1
 805                 // ignore math-mode on when already in math mode
 806                 if (currentMode() == InsetBase::MATH_MODE && cmd.argument() == "on")
 807                         break;
 808                 cur.macroModeClose();
 809                 string const save_selection = grabAndEraseSelection(cur);
 810                 selClearOrDel(cur);
 811                 //cur.plainInsert(MathAtom(new InsetMathMBox(cur.bv())));
 812                 cur.plainInsert(MathAtom(new InsetMathBox("mbox")));
 813                 cur.posLeft();
 814                 cur.pushLeft(*cur.nextInset());
 815                 cur.niceInsert(save_selection);
 816 #else
 817                 if (currentMode() == InsetBase::TEXT_MODE) {
 818                         cur.niceInsert(MathAtom(new InsetMathHull("simple")));
 819                         cur.message(_("create new math text environment ($...$)"));
 820                 } else {
 821                         handleFont(cur, lyx::to_utf8(cmd.argument()), "textrm");
 822                         cur.message(_("entered math text mode (textrm)"));
 823                 }
 824 #endif
 825                 break;
 826         }
 827
 828         case LFUN_MATH_SIZE:
 829 #if 0
 830                 recordUndo(cur);
 831                 cur.setSize(arg);
 832 #endif
 833                 break;
 834
 835         case LFUN_MATH_MATRIX: {
 836                 recordUndo(cur, Undo::ATOMIC);
 837                 unsigned int m = 1;
 838                 unsigned int n = 1;
 839                 string v_align;
 840                 string h_align;
 841                 istringstream is(lyx::to_utf8(cmd.argument()));
 842                 is >> m >> n >> v_align >> h_align;
 843                 if (m < 1)
 844                         m = 1;
 845                 if (n < 1)
 846                         n = 1;
 847                 v_align += 'c';
 848                 cur.niceInsert(
 849                         MathAtom(new InsetMathArray("array", m, n, v_align[0], h_align)));
 850                 break;
 851         }
 852
 853         case LFUN_MATH_DELIM: {
 854                 string ls;
 855                 string rs = lyx::support::split(lyx::to_utf8(cmd.argument()), ls, ' ');
 856                 // Reasonable default values
 857                 if (ls.empty())
 858                         ls = '(';
 859                 if (rs.empty())
 860                         rs = ')';
 861                 recordUndo(cur, Undo::ATOMIC);
 862                 cur.handleNest(MathAtom(new InsetMathDelim(ls, rs)));
 863                 break;
 864         }
 865
 866         case LFUN_MATH_BIGDELIM: {
 867                 string const lname = cmd.getArg(0);
 868                 string const ldelim = cmd.getArg(1);
 869                 string const rname = cmd.getArg(2);
 870                 string const rdelim = cmd.getArg(3);
 871                 latexkeys const * l = in_word_set(lname);
 872                 bool const have_l = l && l->inset == "big" &&
 873                                     InsetMathBig::isBigInsetDelim(ldelim);
 874                 l = in_word_set(rname);
 875                 bool const have_r = l && l->inset == "big" &&
 876                                     InsetMathBig::isBigInsetDelim(rdelim);
 877                 // We mimic LFUN_MATH_DELIM in case we have an empty left
 878                 // or right delimiter.
 879                 if (have_l || have_r) {
 880                         recordUndo(cur, Undo::ATOMIC);
 881                         string const selection = grabAndEraseSelection(cur);
 882                         selClearOrDel(cur);
 883                         if (have_l)
 884                                 cur.insert(MathAtom(new InsetMathBig(lname,
 885                                                                 ldelim)));
 886                         cur.niceInsert(selection);
 887                         if (have_r)
 888                                 cur.insert(MathAtom(new InsetMathBig(rname,
 889                                                                 rdelim)));
 890                 }
 891                 // Don't call cur.undispatched() if we did nothing, this would
 892                 // lead to infinite recursion via LyXText::dispatch().
 893                 break;
 894         }
 895
 896         case LFUN_SPACE_INSERT:
 897         case LFUN_MATH_SPACE:
 898                 recordUndo(cur, Undo::ATOMIC);
 899                 cur.insert(MathAtom(new InsetMathSpace(",")));
 900                 break;
 901
 902         case LFUN_ERT_INSERT:
 903                 // interpret this as if a backslash was typed
 904                 recordUndo(cur, Undo::ATOMIC);
 905                 interpret(cur, '\\');
 906                 break;
 907
 908         case LFUN_MATH_SUBSCRIPT:
 909                 // interpret this as if a _ was typed
 910                 recordUndo(cur, Undo::ATOMIC);
 911                 interpret(cur, '_');
 912                 break;
 913
 914         case LFUN_MATH_SUPERSCRIPT:
 915                 // interpret this as if a ^ was typed
 916                 recordUndo(cur, Undo::ATOMIC);
 917                 interpret(cur, '^');
 918                 break;
 919
 920 // FIXME: We probably should swap parts of "math-insert" and "self-insert"
 921 // handling such that "self-insert" works on "arbitrary stuff" too, and
 922 // math-insert only handles special math things like "matrix".
 923         case LFUN_MATH_INSERT: {
 924                 recordUndo(cur, Undo::ATOMIC);
 925                 if (cmd.argument() == "^" || cmd.argument() == "_")
 926                         interpret(cur, cmd.argument()[0]);
 927                 else
 928                         cur.niceInsert(lyx::to_utf8(cmd.argument()));
 929                 break;
 930                 }
 931
 932         case LFUN_DIALOG_SHOW_NEW_INSET: {
 933                 string const & name = lyx::to_utf8(cmd.argument());
 934                 string data;
 935                 if (name == "ref") {
 936                         RefInset tmp(name);
 937                         data = tmp.createDialogStr(name);
 938                 }
 939                 cur.bv().showInsetDialog(name, data, 0);
 940                 break;
 941         }
 942
 943         default:
 944                 InsetMathDim::doDispatch(cur, cmd);
 945                 break;
 946         }
 947 }
 948
 949
 950 bool InsetMathNest::getStatus(LCursor & cur, FuncRequest const & cmd,
 951                 FuncStatus & flag) const
 952 {
 953         // the font related toggles
 954         //string tc = "mathnormal";
 955         bool ret = true;
 956         string const arg = lyx::to_utf8(cmd.argument());
 957         switch (cmd.action) {
 958         case LFUN_TABULAR_FEATURE:
 959                 flag.enabled(false);
 960                 break;
 961 #if 0
 962         case LFUN_TABULAR_FEATURE:
 963                 // FIXME: check temporarily disabled
 964                 // valign code
 965                 char align = mathcursor::valign();
 966                 if (align == '\0') {
 967                         enable = false;
 968                         break;
 969                 }
 970                 if (cmd.argument().empty()) {
 971                         flag.clear();
 972                         break;
 973                 }
 974                 if (!contains("tcb", cmd.argument()[0])) {
 975                         enable = false;
 976                         break;
 977                 }
 978                 flag.setOnOff(cmd.argument()[0] == align);
 979                 break;
 980 #endif
 981         /// We have to handle them since 1.4 blocks all unhandled actions
 982         case LFUN_FONT_ITAL:
 983         case LFUN_FONT_BOLD:
 984         case LFUN_FONT_SANS:
 985         case LFUN_FONT_EMPH:
 986         case LFUN_FONT_CODE:
 987         case LFUN_FONT_NOUN:
 988         case LFUN_FONT_ROMAN:
 989         case LFUN_FONT_DEFAULT:
 990                 flag.enabled(true);
 991                 break;
 992         case LFUN_MATH_MUTATE:
 993                 //flag.setOnOff(mathcursor::formula()->hullType() == lyx::to_utf8(cmd.argument()));
 994                 flag.setOnOff(false);
 995                 break;
 996
 997         // we just need to be in math mode to enable that
 998         case LFUN_MATH_SIZE:
 999         case LFUN_MATH_SPACE:
1000         case LFUN_MATH_LIMITS:
1001         case LFUN_MATH_NONUMBER:
1002         case LFUN_MATH_NUMBER:
1003         case LFUN_MATH_EXTERN:
1004                 flag.enabled(true);
1005                 break;
1006
1007         case LFUN_FONT_FRAK:
1008                 flag.enabled(currentMode() != TEXT_MODE);
1009                 break;
1010
1011         case LFUN_MATH_INSERT: {
1012                 bool const textarg =
1013                         arg == "\\textbf"   || arg == "\\textsf" ||
1014                         arg == "\\textrm"   || arg == "\\textmd" ||
1015                         arg == "\\textit"   || arg == "\\textsc" ||
1016                         arg == "\\textsl"   || arg == "\\textup" ||
1017                         arg == "\\texttt"   || arg == "\\textbb" ||
1018                         arg == "\\textnormal";
1019                 flag.enabled(currentMode() != TEXT_MODE || textarg);
1020                 break;
1021         }
1022
1023         case LFUN_MATH_MATRIX:
1024                 flag.enabled(currentMode() == MATH_MODE);
1025                 break;
1026
1027         case LFUN_MATH_DELIM:
1028         case LFUN_MATH_BIGDELIM:
1029                 // Don't do this with multi-cell selections
1030                 flag.enabled(cur.selBegin().idx() == cur.selEnd().idx());
1031                 break;
1032
1033         default:
1034                 ret = false;
1035                 break;
1036         }
1037         return ret;
1038 }
1039
1040
1041 void InsetMathNest::edit(LCursor & cur, bool left)
1042 {
1043         cur.push(*this);
1044         cur.idx() = left ? 0 : cur.lastidx();
1045         cur.pos() = left ? 0 : cur.lastpos();
1046         cur.resetAnchor();
1047         //lyxerr << "InsetMathNest::edit, cur:\n" << cur << endl;
1048 }
1049
1050
1051 InsetBase * InsetMathNest::editXY(LCursor & cur, int x, int y)
1052 {
1053         int idx_min = 0;
1054         int dist_min = 1000000;
1055         for (idx_type i = 0, n = nargs(); i != n; ++i) {
1056                 int const d = cell(i).dist(x, y);
1057                 if (d < dist_min) {
1058                         dist_min = d;
1059                         idx_min = i;
1060                 }
1061         }
1062         MathArray & ar = cell(idx_min);
1063         cur.push(*this);
1064         cur.idx() = idx_min;
1065         cur.pos() = ar.x2pos(x - ar.xo());
1066         //lyxerr << "found cell : " << idx_min << " pos: " << cur.pos() << endl;
1067         if (dist_min == 0) {
1068                 // hit inside cell
1069                 for (pos_type i = 0, n = ar.size(); i < n; ++i)
1070                         if (ar[i]->covers(x, y))
1071                                 return ar[i].nucleus()->editXY(cur, x, y);
1072         }
1073         return this;
1074 }
1075
1076
1077 void InsetMathNest::lfunMousePress(LCursor & cur, FuncRequest & cmd)
1078 {
1079         //lyxerr << "## lfunMousePress: buttons: " << cmd.button() << endl;
1080         BufferView & bv = cur.bv();
1081         if (cmd.button() == mouse_button::button1) {
1082                 //lyxerr << "## lfunMousePress: setting cursor to: " << cur << endl;
1083                 bv.mouseSetCursor(cur);
1084         } else if (cmd.button() == mouse_button::button2) {
1085                 MathArray ar;
1086                 if (cur.selection())
1087                         asArray(lyx::to_utf8(bv.cursor().selectionAsString(false)), ar);
1088                 else
1089                         asArray(lyx::to_utf8(theApp->selection().get()), ar);
1090
1091                 cur.insert(ar);
1092                 bv.mouseSetCursor(cur);
1093         }
1094 }
1095
1096
1097 void InsetMathNest::lfunMouseMotion(LCursor & cur, FuncRequest & cmd)
1098 {
1099         // only select with button 1
1100         if (cmd.button() == mouse_button::button1) {
1101                 LCursor & bvcur = cur.bv().cursor();
1102                 if (bvcur.anchor_.hasPart(cur)) {
1103                         //lyxerr << "## lfunMouseMotion: cursor: " << cur << endl;
1104                         bvcur.setCursor(cur);
1105                         bvcur.selection() = true;
1106                         //lyxerr << "MOTION " << bvcur << endl;
1107                 }
1108                 else {
1109                         cur.undispatched();
1110                 }
1111         }
1112 }
1113
1114
1115 void InsetMathNest::lfunMouseRelease(LCursor & cur, FuncRequest & cmd)
1116 {
1117         //lyxerr << "## lfunMouseRelease: buttons: " << cmd.button() << endl;
1118
1119         if (cmd.button() == mouse_button::button1) {
1120                 //theApp->selection().put(cur.grabSelection());
1121                 return;
1122         }
1123
1124         if (cmd.button() == mouse_button::button3) {
1125                 // try to dispatch to enclosed insets first
1126                 cur.bv().showDialog("mathpanel");
1127                 return;
1128         }
1129
1130         cur.undispatched();
1131 }
1132
1133
1134 bool InsetMathNest::interpret(LCursor & cur, char c)
1135 {
1136         //lyxerr << "interpret 2: '" << c << "'" << endl;
1137         string save_selection;
1138         if (c == '^' || c == '_')
1139                 save_selection = grabAndEraseSelection(cur);
1140
1141         cur.clearTargetX();
1142
1143         // handle macroMode
1144         if (cur.inMacroMode()) {
1145                 string name = cur.macroName();
1146
1147                 /// are we currently typing '#1' or '#2' or...?
1148                 if (name == "\\#") {
1149                         cur.backspace();
1150                         int n = c - '0';
1151                         if (n >= 1 && n <= 9)
1152                                 cur.insert(new MathMacroArgument(n));
1153                         return true;
1154                 }
1155
1156                 if (isalpha(c)) {
1157                         cur.activeMacro()->setName(name + c);
1158                         return true;
1159                 }
1160
1161                 // handle 'special char' macros
1162                 if (name == "\\") {
1163                         // remove the '\\'
1164                         if (c == '\\') {
1165                                 cur.backspace();
1166                                 if (currentMode() == InsetMath::TEXT_MODE)
1167                                         cur.niceInsert(createInsetMath("textbackslash"));
1168                                 else
1169                                         cur.niceInsert(createInsetMath("backslash"));
1170                         } else if (c == '{') {
1171                                 cur.backspace();
1172                                 cur.niceInsert(MathAtom(new InsetMathBrace));
1173                         } else if (c == '%') {
1174                                 cur.backspace();
1175                                 cur.niceInsert(MathAtom(new InsetMathComment));
1176                         } else if (c == '#') {
1177                                 BOOST_ASSERT(cur.activeMacro());
1178                                 cur.activeMacro()->setName(name + c);
1179                         } else {
1180                                 cur.backspace();
1181                                 cur.niceInsert(createInsetMath(string(1, c)));
1182                         }
1183                         return true;
1184                 }
1185
1186                 // One character big delimiters. The others are handled in
1187                 // the other interpret() method.
1188                 latexkeys const * l = in_word_set(name.substr(1));
1189                 if (name[0] == '\\' && l && l->inset == "big") {
1190                         string delim;
1191                         switch (c) {
1192                         case '{':
1193                                 delim = "\\{";
1194                                 break;
1195                         case '}':
1196                                 delim = "\\}";
1197                                 break;
1198                         default:
1199                                 delim = string(1, c);
1200                                 break;
1201                         }
1202                         if (InsetMathBig::isBigInsetDelim(delim)) {
1203                                 // name + delim ared a valid InsetMathBig.
1204                                 // We can't use cur.macroModeClose() because
1205                                 // it does not handle delim.
1206                                 InsetMathUnknown * p = cur.activeMacro();
1207                                 p->finalize();
1208                                 --cur.pos();
1209                                 cur.cell().erase(cur.pos());
1210                                 cur.plainInsert(MathAtom(
1211                                         new InsetMathBig(name.substr(1), delim)));
1212                                 return true;
1213                         }
1214                 }
1215
1216                 // leave macro mode and try again if necessary
1217                 cur.macroModeClose();
1218                 if (c == '{')
1219                         cur.niceInsert(MathAtom(new InsetMathBrace));
1220                 else if (c != ' ')
1221                         interpret(cur, c);
1222                 return true;
1223         }
1224
1225         // This is annoying as one has to press <space> far too often.
1226         // Disable it.
1227
1228 #if 0
1229                 // leave autocorrect mode if necessary
1230                 if (autocorrect() && c == ' ') {
1231                         autocorrect() = false;
1232                         return true;
1233                 }
1234 #endif
1235
1236         // just clear selection on pressing the space bar
1237         if (cur.selection() && c == ' ') {
1238                 cur.selection() = false;
1239                 return true;
1240         }
1241
1242         selClearOrDel(cur);
1243
1244         if (c == '\\') {
1245                 //lyxerr << "starting with macro" << endl;
1246                 cur.insert(MathAtom(new InsetMathUnknown("\\", false)));
1247                 return true;
1248         }
1249
1250         if (c == '\n') {
1251                 if (currentMode() == InsetMath::TEXT_MODE)
1252                         cur.insert(c);
1253                 return true;
1254         }
1255
1256         if (c == ' ') {
1257                 if (currentMode() == InsetMath::TEXT_MODE) {
1258                         // insert spaces in text mode,
1259                         // but suppress direct insertion of two spaces in a row
1260                         // the still allows typing  '<space>a<space>' and deleting the 'a', but
1261                         // it is better than nothing...
1262                         if (!cur.pos() != 0 || cur.prevAtom()->getChar() != ' ')
1263                                 cur.insert(c);
1264                         return true;
1265                 }
1266                 if (cur.pos() != 0 && cur.prevAtom()->asSpaceInset()) {
1267                         cur.prevAtom().nucleus()->asSpaceInset()->incSpace();
1268                         return true;
1269                 }
1270                 if (cur.popRight())
1271                         return true;
1272                 // if are at the very end, leave the formula
1273                 return cur.pos() != cur.lastpos();
1274         }
1275
1276         // These shouldn't work in text mode:
1277         if (currentMode() != InsetMath::TEXT_MODE) {
1278                 if (c == '_') {
1279                         script(cur, false, save_selection);
1280                         return true;
1281                 }
1282                 if (c == '^') {
1283                         script(cur, true, save_selection);
1284                         return true;
1285                 }
1286                 if (c == '~') {
1287                         cur.niceInsert(createInsetMath("sim"));
1288                         return true;
1289                 }
1290         }
1291
1292         if (c == '{' || c == '}' || c == '&' || c == '$' || c == '#' ||
1293             c == '%' || c == '_' || c == '^') {
1294                 cur.niceInsert(createInsetMath(string(1, c)));
1295                 return true;
1296         }
1297
1298
1299         // try auto-correction
1300         //if (autocorrect() && hasPrevAtom() && math_autocorrect(prevAtom(), c))
1301         //      return true;
1302
1303         // no special circumstances, so insert the character without any fuss
1304         cur.insert(c);
1305         cur.autocorrect() = true;
1306         return true;
1307 }
1308
1309
1310 bool InsetMathNest::interpret(LCursor & cur, string const & str)
1311 {
1312         // Create a InsetMathBig from cur.cell()[cur.pos() - 1] and t if
1313         // possible
1314         if (!cur.empty() && cur.pos() > 0 &&
1315             cur.cell()[cur.pos() - 1]->asUnknownInset()) {
1316                 if (InsetMathBig::isBigInsetDelim(str)) {
1317                         string prev = asString(cur.cell()[cur.pos() - 1]);
1318                         if (prev[0] == '\\') {
1319                                 prev = prev.substr(1);
1320                                 latexkeys const * l = in_word_set(prev);
1321                                 if (l && l->inset == "big") {
1322                                         cur.cell()[cur.pos() - 1] =
1323                                                 MathAtom(new InsetMathBig(prev, str));
1324                                         return true;
1325                                 }
1326                         }
1327                 }
1328         }
1329         return false;
1330 }
1331
1332
1333 bool InsetMathNest::script(LCursor & cur, bool up, string const &
1334                 save_selection)
1335 {
1336         // Hack to get \^ and \_ working
1337         //lyxerr << "handling script: up: " << up << endl;
1338         if (cur.inMacroMode() && cur.macroName() == "\\") {
1339                 if (up)
1340                         cur.niceInsert(createInsetMath("mathcircumflex"));
1341                 else
1342                         interpret(cur, '_');
1343                 return true;
1344         }
1345
1346         cur.macroModeClose();
1347         if (asScriptInset() && cur.idx() == 0) {
1348                 // we are in a nucleus of a script inset, move to _our_ script
1349                 InsetMathScript * inset = asScriptInset();
1350                 //lyxerr << " going to cell " << inset->idxOfScript(up) << endl;
1351                 inset->ensure(up);
1352                 cur.idx() = inset->idxOfScript(up);
1353                 cur.pos() = 0;
1354         } else if (cur.pos() != 0 && cur.prevAtom()->asScriptInset()) {
1355                 --cur.pos();
1356                 InsetMathScript * inset = cur.nextAtom().nucleus()->asScriptInset();
1357                 cur.push(*inset);
1358                 inset->ensure(up);
1359                 cur.idx() = inset->idxOfScript(up);
1360                 cur.pos() = cur.lastpos();
1361         } else {
1362                 // convert the thing to our left to a scriptinset or create a new
1363                 // one if in the very first position of the array
1364                 if (cur.pos() == 0) {
1365                         //lyxerr << "new scriptinset" << endl;
1366                         cur.insert(new InsetMathScript(up));
1367                 } else {
1368                         //lyxerr << "converting prev atom " << endl;
1369                         cur.prevAtom() = MathAtom(new InsetMathScript(cur.prevAtom(), up));
1370                 }
1371                 --cur.pos();
1372                 InsetMathScript * inset = cur.nextAtom().nucleus()->asScriptInset();
1373                 // special handling of {}-bases
1374                 // is this always correct?
1375                 if (inset->nuc().size() == 1
1376                     && inset->nuc().back()->asBraceInset())
1377                         inset->nuc() = inset->nuc().back()->asNestInset()->cell(0);
1378
1379                 cur.push(*inset);
1380                 cur.idx() = 1;
1381                 cur.pos() = 0;
1382         }
1383         //lyxerr << "inserting selection 1:\n" << save_selection << endl;
1384         cur.niceInsert(save_selection);
1385         cur.resetAnchor();
1386         //lyxerr << "inserting selection 2:\n" << save_selection << endl;
1387         return true;
1388 }