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/Painter.h"
  53 #include "frontends/Selection.h"
  54 #include "frontends/nullpainter.h"
  55
  56 #include "funcrequest.h"
  57 #include "lyxserver.h"
  58 #include "lyxsocket.h"
  59
  60 #include <sstream>
  61
  62 using lyx::cap::copySelection;
  63 using lyx::cap::grabAndEraseSelection;
  64 using lyx::cap::cutSelection;
  65 using lyx::cap::replaceSelection;
  66 using lyx::cap::selClearOrDel;
  67
  68 using std::endl;
  69 using std::string;
  70 using std::istringstream;
  71
  72
  73 InsetMathNest::InsetMathNest(idx_type nargs)
  74         : cells_(nargs), lock_(false)
  75 {}
  76
  77
  78 InsetMath::idx_type InsetMathNest::nargs() const
  79 {
  80         return cells_.size();
  81 }
  82
  83
  84 MathArray & InsetMathNest::cell(idx_type i)
  85 {
  86         return cells_[i];
  87 }
  88
  89
  90 MathArray const & InsetMathNest::cell(idx_type i) const
  91 {
  92         return cells_[i];
  93 }
  94
  95
  96 void InsetMathNest::cursorPos(CursorSlice const & sl, bool /*boundary*/,
  97         int & x, int & y) const
  98 {
  99 // FIXME: This is a hack. Ideally, the coord cache should not store
 100 // absolute positions, but relative ones. This would mean to call
 101 // setXY() not in MathArray::draw(), but in the parent insets' draw()
 102 // with the correctly adjusted x,y values. But this means that we'd have
 103 // to touch all (math)inset's draw() methods. Right now, we'll store
 104 // absolute value, and make them here relative, only to make them
 105 // absolute again when actually drawing the cursor. What a mess.
 106         BOOST_ASSERT(ptr_cmp(&sl.inset(), this));
 107         MathArray const & ar = sl.cell();
 108         if (!theCoords.getArrays().has(&ar)) {
 109                 // this can (semi-)legally happen if we just created this cell
 110                 // and it never has been drawn before. So don't ASSERT.
 111                 //lyxerr << "no cached data for array " << &ar << endl;
 112                 x = 0;
 113                 y = 0;
 114                 return;
 115         }
 116         Point const pt = theCoords.getArrays().xy(&ar);
 117         if (!theCoords.getInsets().has(this)) {
 118                 // same as above
 119                 //lyxerr << "no cached data for inset " << this << endl;
 120                 x = 0;
 121                 y = 0;
 122                 return;
 123         }
 124         Point const pt2 = theCoords.getInsets().xy(this);
 125         //lyxerr << "retrieving position cache for MathArray "
 126         //      << pt.x_ << ' ' << pt.y_ << std::endl;
 127         x = pt.x_ - pt2.x_ + ar.pos2x(sl.pos());
 128         y = pt.y_ - pt2.y_;
 129 //      lyxerr << "pt.y_ : " << pt.y_ << " pt2_.y_ : " << pt2.y_
 130 //              << " asc: " << ascent() << "  des: " << descent()
 131 //              << " ar.asc: " << ar.ascent() << " ar.des: " << ar.descent() << endl;
 132         // move cursor visually into empty cells ("blue rectangles");
 133         if (ar.empty())
 134                 x += 2;
 135 }
 136
 137
 138 void InsetMathNest::metrics(MetricsInfo const & mi) const
 139 {
 140         MetricsInfo m = mi;
 141         for (idx_type i = 0, n = nargs(); i != n; ++i)
 142                 cell(i).metrics(m);
 143 }
 144
 145
 146 bool InsetMathNest::idxNext(LCursor & cur) const
 147 {
 148         BOOST_ASSERT(ptr_cmp(&cur.inset(), this));
 149         if (cur.idx() == cur.lastidx())
 150                 return false;
 151         ++cur.idx();
 152         cur.pos() = 0;
 153         return true;
 154 }
 155
 156
 157 bool InsetMathNest::idxRight(LCursor & cur) const
 158 {
 159         return idxNext(cur);
 160 }
 161
 162
 163 bool InsetMathNest::idxPrev(LCursor & cur) const
 164 {
 165         BOOST_ASSERT(ptr_cmp(&cur.inset(), this));
 166         if (cur.idx() == 0)
 167                 return false;
 168         --cur.idx();
 169         cur.pos() = cur.lastpos();
 170         return true;
 171 }
 172
 173
 174 bool InsetMathNest::idxLeft(LCursor & cur) const
 175 {
 176         return idxPrev(cur);
 177 }
 178
 179
 180 bool InsetMathNest::idxFirst(LCursor & cur) const
 181 {
 182         BOOST_ASSERT(ptr_cmp(&cur.inset(), this));
 183         if (nargs() == 0)
 184                 return false;
 185         cur.idx() = 0;
 186         cur.pos() = 0;
 187         return true;
 188 }
 189
 190
 191 bool InsetMathNest::idxLast(LCursor & cur) const
 192 {
 193         BOOST_ASSERT(ptr_cmp(&cur.inset(), this));
 194         if (nargs() == 0)
 195                 return false;
 196         cur.idx() = cur.lastidx();
 197         cur.pos() = cur.lastpos();
 198         return true;
 199 }
 200
 201
 202 void InsetMathNest::dump() const
 203 {
 204         WriteStream os(lyxerr);
 205         os << "---------------------------------------------\n";
 206         write(os);
 207         os << "\n";
 208         for (idx_type i = 0, n = nargs(); i != n; ++i)
 209                 os << cell(i) << "\n";
 210         os << "---------------------------------------------\n";
 211 }
 212
 213
 214 void InsetMathNest::draw(PainterInfo & pi, int x, int y) const
 215 {
 216 #if 0
 217         if (lock_)
 218                 pi.pain.fillRectangle(x, y - ascent(), width(), height(),
 219                                         LColor::mathlockbg);
 220 #endif
 221         setPosCache(pi, x, y);
 222 }
 223
 224
 225 void InsetMathNest::drawSelection(PainterInfo & pi, int x, int y) const
 226 {
 227         // this should use the x/y values given, not the cached values
 228         LCursor & cur = pi.base.bv->cursor();
 229         if (!cur.selection())
 230                 return;
 231         if (!ptr_cmp(&cur.inset(), this))
 232                 return;
 233
 234         // FIXME: hack to get position cache warm
 235         static lyx::frontend::NullPainter nop;
 236         PainterInfo pinop(pi);
 237         pinop.pain = nop;
 238         draw(pinop, x, y);
 239
 240         CursorSlice s1 = cur.selBegin();
 241         CursorSlice s2 = cur.selEnd();
 242         //lyxerr << "InsetMathNest::drawing selection: "
 243         //      << " s1: " << s1 << " s2: " << s2 << endl;
 244         if (s1.idx() == s2.idx()) {
 245                 MathArray const & c = cell(s1.idx());
 246                 int x1 = c.xo() + c.pos2x(s1.pos());
 247                 int y1 = c.yo() - c.ascent();
 248                 int x2 = c.xo() + c.pos2x(s2.pos());
 249                 int y2 = c.yo() + c.descent();
 250                 pi.pain.fillRectangle(x1, y1, x2 - x1, y2 - y1, LColor::selection);
 251         //lyxerr << "InsetMathNest::drawing selection 3: "
 252         //      << " x1: " << x1 << " x2: " << x2
 253         //      << " y1: " << y1 << " y2: " << y2 << endl;
 254         } else {
 255                 for (idx_type i = 0; i < nargs(); ++i) {
 256                         if (idxBetween(i, s1.idx(), s2.idx())) {
 257                                 MathArray const & c = cell(i);
 258                                 int x1 = c.xo();
 259                                 int y1 = c.yo() - c.ascent();
 260                                 int x2 = c.xo() + c.width();
 261                                 int y2 = c.yo() + c.descent();
 262                                 pi.pain.fillRectangle(x1, y1, x2 - x1, y2 - y1, LColor::selection);
 263                         }
 264                 }
 265         }
 266 }
 267
 268
 269 void InsetMathNest::validate(LaTeXFeatures & features) const
 270 {
 271         for (idx_type i = 0; i < nargs(); ++i)
 272                 cell(i).validate(features);
 273 }
 274
 275
 276 void InsetMathNest::replace(ReplaceData & rep)
 277 {
 278         for (idx_type i = 0; i < nargs(); ++i)
 279                 cell(i).replace(rep);
 280 }
 281
 282
 283 bool InsetMathNest::contains(MathArray const & ar) const
 284 {
 285         for (idx_type i = 0; i < nargs(); ++i)
 286                 if (cell(i).contains(ar))
 287                         return true;
 288         return false;
 289 }
 290
 291
 292 bool InsetMathNest::lock() const
 293 {
 294         return lock_;
 295 }
 296
 297
 298 void InsetMathNest::lock(bool l)
 299 {
 300         lock_ = l;
 301 }
 302
 303
 304 bool InsetMathNest::isActive() const
 305 {
 306         return nargs() > 0;
 307 }
 308
 309
 310 MathArray InsetMathNest::glue() const
 311 {
 312         MathArray ar;
 313         for (size_t i = 0; i < nargs(); ++i)
 314                 ar.append(cell(i));
 315         return ar;
 316 }
 317
 318
 319 void InsetMathNest::write(WriteStream & os) const
 320 {
 321         os << '\\' << name().c_str();
 322         for (size_t i = 0; i < nargs(); ++i)
 323                 os << '{' << cell(i) << '}';
 324         if (nargs() == 0)
 325                 os.pendingSpace(true);
 326         if (lock_ && !os.latex()) {
 327                 os << "\\lyxlock";
 328                 os.pendingSpace(true);
 329         }
 330 }
 331
 332
 333 void InsetMathNest::normalize(NormalStream & os) const
 334 {
 335         os << '[' << name().c_str();
 336         for (size_t i = 0; i < nargs(); ++i)
 337                 os << ' ' << cell(i);
 338         os << ']';
 339 }
 340
 341
 342 int InsetMathNest::latex(Buffer const &, std::ostream & os,
 343                         OutputParams const & runparams) const
 344 {
 345         WriteStream wi(os, runparams.moving_arg, true);
 346         write(wi);
 347         return wi.line();
 348 }
 349
 350
 351 bool InsetMathNest::notifyCursorLeaves(LCursor & /*cur*/)
 352 {
 353 #ifdef WITH_WARNINGS
 354 #warning look here
 355 #endif
 356 #if 0
 357         MathArray & ar = cur.cell();
 358         // remove base-only "scripts"
 359         for (pos_type i = 0; i + 1 < ar.size(); ++i) {
 360                 InsetMathScript * p = operator[](i).nucleus()->asScriptInset();
 361                 if (p && p->nargs() == 1) {
 362                         MathArray ar = p->nuc();
 363                         erase(i);
 364                         insert(i, ar);
 365                         cur.adjust(i, ar.size() - 1);
 366                 }
 367         }
 368
 369         // glue adjacent font insets of the same kind
 370         for (pos_type i = 0; i + 1 < size(); ++i) {
 371                 InsetMathFont * p = operator[](i).nucleus()->asFontInset();
 372                 InsetMathFont const * q = operator[](i + 1)->asFontInset();
 373                 if (p && q && p->name() == q->name()) {
 374                         p->cell(0).append(q->cell(0));
 375                         erase(i + 1);
 376                         cur.adjust(i, -1);
 377                 }
 378         }
 379 #endif
 380         return false;
 381 }
 382
 383
 384 void InsetMathNest::handleFont
 385         (LCursor & cur, string const & arg, string const & font)
 386 {
 387         // this whole function is a hack and won't work for incremental font
 388         // changes...
 389         recordUndo(cur, Undo::ATOMIC);
 390
 391         if (cur.inset().asInsetMath()->name() == font)
 392                 cur.handleFont(font);
 393         else {
 394                 cur.handleNest(createInsetMath(font));
 395                 cur.insert(arg);
 396         }
 397 }
 398
 399
 400 void InsetMathNest::handleFont2(LCursor & cur, string const & arg)
 401 {
 402         recordUndo(cur, Undo::ATOMIC);
 403         LyXFont font;
 404         bool b;
 405         bv_funcs::string2font(arg, font, b);
 406         if (font.color() != LColor::inherit) {
 407                 MathAtom at = MathAtom(new InsetMathColor(true, font.color()));
 408                 cur.handleNest(at, 0);
 409         }
 410 }
 411
 412
 413 void InsetMathNest::doDispatch(LCursor & cur, FuncRequest & cmd)
 414 {
 415         //lyxerr << "InsetMathNest: request: " << cmd << std::endl;
 416         //CursorSlice sl = cur.current();
 417
 418         switch (cmd.action) {
 419
 420         case LFUN_PASTE: {
 421                 recordUndo(cur);
 422                 cur.message(_("Paste"));
 423                 replaceSelection(cur);
 424                 size_t n = 0;
 425                 istringstream is(lyx::to_utf8(cmd.argument()));
 426                 is >> n;
 427                 string const selection = lyx::cap::getSelection(cur.buffer(), n);
 428                 cur.niceInsert(selection);
 429                 cur.clearSelection(); // bug 393
 430                 cur.bv().switchKeyMap();
 431                 finishUndo();
 432                 break;
 433         }
 434
 435         case LFUN_CUT:
 436                 recordUndo(cur);
 437                 cutSelection(cur, true, true);
 438                 cur.message(_("Cut"));
 439                 // Prevent stale position >= size crash
 440                 // Probably not necessary anymore, see eraseSelection (gb 2005-10-09)
 441                 cur.normalize();
 442                 break;
 443
 444         case LFUN_COPY:
 445                 copySelection(cur);
 446                 // FIXME UNICODE
 447                 cur.message(_("Copy"));
 448                 break;
 449
 450         case LFUN_MOUSE_PRESS:
 451                 lfunMousePress(cur, cmd);
 452                 break;
 453
 454         case LFUN_MOUSE_MOTION:
 455                 lfunMouseMotion(cur, cmd);
 456                 break;
 457
 458         case LFUN_MOUSE_RELEASE:
 459                 lfunMouseRelease(cur, cmd);
 460                 break;
 461
 462         case LFUN_FINISHED_LEFT:
 463                 cur.bv().cursor() = cur;
 464                 break;
 465
 466         case LFUN_FINISHED_RIGHT:
 467                 ++cur.pos();
 468                 cur.bv().cursor() = cur;
 469                 break;
 470
 471         case LFUN_FINISHED_UP:
 472                 cur.bv().cursor() = cur;
 473                 break;
 474
 475         case LFUN_FINISHED_DOWN:
 476                 ++cur.pos();
 477                 cur.bv().cursor() = cur;
 478                 break;
 479
 480         case LFUN_CHAR_FORWARD_SELECT:
 481         case LFUN_CHAR_FORWARD:
 482                 cur.selHandle(cmd.action == LFUN_CHAR_FORWARD_SELECT);
 483                 cur.autocorrect() = false;
 484                 cur.clearTargetX();
 485                 cur.macroModeClose();
 486                 if (cur.pos() != cur.lastpos() && cur.openable(cur.nextAtom())) {
 487                         cur.pushLeft(*cur.nextAtom().nucleus());
 488                         cur.inset().idxFirst(cur);
 489                 } else if (cur.posRight() || idxRight(cur)
 490                         || cur.popRight() || cur.selection())
 491                         ;
 492                 else {
 493                         cmd = FuncRequest(LFUN_FINISHED_RIGHT);
 494                         cur.undispatched();
 495                 }
 496                 break;
 497
 498         case LFUN_CHAR_BACKWARD_SELECT:
 499         case LFUN_CHAR_BACKWARD:
 500                 cur.selHandle(cmd.action == LFUN_CHAR_BACKWARD_SELECT);
 501                 cur.autocorrect() = false;
 502                 cur.clearTargetX();
 503                 cur.macroModeClose();
 504                 if (cur.pos() != 0 && cur.openable(cur.prevAtom())) {
 505                         cur.posLeft();
 506                         cur.push(*cur.nextAtom().nucleus());
 507                         cur.inset().idxLast(cur);
 508                 } else if (cur.posLeft() || idxLeft(cur)
 509                         || cur.popLeft() || cur.selection())
 510                         ;
 511                 else {
 512                         cmd = FuncRequest(LFUN_FINISHED_LEFT);
 513                         cur.undispatched();
 514                 }
 515                 break;
 516
 517         case LFUN_UP_SELECT:
 518         case LFUN_UP:
 519                 // FIXME Tried to use clearTargetX and macroModeClose, crashed on cur.up()
 520                 if (cur.inMacroMode()) {
 521                         // Make Helge happy
 522                         cur.macroModeClose();
 523                         break;
 524                 }
 525                 cur.selHandle(cmd.action == LFUN_UP_SELECT);
 526                 if (!cur.up()) {
 527                         cmd = FuncRequest(LFUN_FINISHED_UP);
 528                         cur.undispatched();
 529                 }
 530                 // fixes bug 1598. Please check!
 531                 cur.normalize();
 532                 break;
 533
 534         case LFUN_DOWN_SELECT:
 535         case LFUN_DOWN:
 536                 if (cur.inMacroMode()) {
 537                         cur.macroModeClose();
 538                         break;
 539                 }
 540                 cur.selHandle(cmd.action == LFUN_DOWN_SELECT);
 541                 if (!cur.down()) {
 542                         cmd = FuncRequest(LFUN_FINISHED_DOWN);
 543                         cur.undispatched();
 544                 }
 545                 // fixes bug 1598. Please check!
 546                 cur.normalize();
 547                 break;
 548
 549         case LFUN_MOUSE_DOUBLE:
 550         case LFUN_MOUSE_TRIPLE:
 551         case LFUN_WORD_SELECT:
 552                 cur.pos() = 0;
 553                 cur.idx() = 0;
 554                 cur.resetAnchor();
 555                 cur.selection() = true;
 556                 cur.pos() = cur.lastpos();
 557                 cur.idx() = cur.lastidx();
 558                 break;
 559
 560         case LFUN_PARAGRAPH_UP_SELECT:
 561         case LFUN_PARAGRAPH_UP:
 562         case LFUN_PARAGRAPH_DOWN_SELECT:
 563         case LFUN_PARAGRAPH_DOWN:
 564                 break;
 565
 566         case LFUN_LINE_BEGIN_SELECT:
 567         case LFUN_LINE_BEGIN:
 568         case LFUN_WORD_BACKWARD_SELECT:
 569         case LFUN_WORD_BACKWARD:
 570                 cur.selHandle(cmd.action == LFUN_WORD_BACKWARD_SELECT ||
 571                                 cmd.action == LFUN_LINE_BEGIN_SELECT);
 572                 cur.macroModeClose();
 573                 if (cur.pos() != 0) {
 574                         cur.pos() = 0;
 575                 } else if (cur.col() != 0) {
 576                         cur.idx() -= cur.col();
 577                         cur.pos() = 0;
 578                 } else if (cur.idx() != 0) {
 579                         cur.idx() = 0;
 580                         cur.pos() = 0;
 581                 } else {
 582                         cmd = FuncRequest(LFUN_FINISHED_LEFT);
 583                         cur.undispatched();
 584                 }
 585                 break;
 586
 587         case LFUN_WORD_FORWARD_SELECT:
 588         case LFUN_WORD_FORWARD:
 589         case LFUN_LINE_END_SELECT:
 590         case LFUN_LINE_END:
 591                 cur.selHandle(cmd.action == LFUN_WORD_FORWARD_SELECT ||
 592                                 cmd.action == LFUN_LINE_END_SELECT);
 593                 cur.macroModeClose();
 594                 cur.clearTargetX();
 595                 if (cur.pos() != cur.lastpos()) {
 596                         cur.pos() = cur.lastpos();
 597                 } else if (ncols() && (cur.col() != cur.lastcol())) {
 598                         cur.idx() = cur.idx() - cur.col() + cur.lastcol();
 599                         cur.pos() = cur.lastpos();
 600                 } else if (cur.idx() != cur.lastidx()) {
 601                         cur.idx() = cur.lastidx();
 602                         cur.pos() = cur.lastpos();
 603                 } else {
 604                         cmd = FuncRequest(LFUN_FINISHED_RIGHT);
 605                         cur.undispatched();
 606                 }
 607                 break;
 608
 609         case LFUN_SCREEN_UP_SELECT:
 610         case LFUN_SCREEN_UP:
 611                 cmd = FuncRequest(LFUN_FINISHED_LEFT);
 612                 cur.undispatched();
 613                 break;
 614
 615         case LFUN_SCREEN_DOWN_SELECT:
 616         case LFUN_SCREEN_DOWN:
 617                 cmd = FuncRequest(LFUN_FINISHED_RIGHT);
 618                 cur.undispatched();
 619                 break;
 620
 621         case LFUN_CELL_FORWARD:
 622                 cur.inset().idxNext(cur);
 623                 break;
 624
 625         case LFUN_CELL_BACKWARD:
 626                 cur.inset().idxPrev(cur);
 627                 break;
 628
 629         case LFUN_WORD_DELETE_BACKWARD:
 630         case LFUN_CHAR_DELETE_BACKWARD:
 631                 if (cur.pos() == 0)
 632                         // May affect external cell:
 633                         recordUndoInset(cur, Undo::ATOMIC);
 634                 else
 635                         recordUndo(cur, Undo::ATOMIC);
 636                 cur.backspace();
 637                 break;
 638
 639         case LFUN_WORD_DELETE_FORWARD:
 640         case LFUN_CHAR_DELETE_FORWARD:
 641                 if (cur.pos() == cur.lastpos())
 642                         // May affect external cell:
 643                         recordUndoInset(cur, Undo::ATOMIC);
 644                 else
 645                         recordUndo(cur, Undo::ATOMIC);
 646                 cur.erase();
 647                 break;
 648
 649         case LFUN_ESCAPE:
 650                 if (cur.selection())
 651                         cur.clearSelection();
 652                 else  {
 653                         cmd = FuncRequest(LFUN_FINISHED_RIGHT);
 654                         cur.undispatched();
 655                 }
 656                 break;
 657
 658         case LFUN_INSET_TOGGLE:
 659                 recordUndo(cur);
 660                 lock(!lock());
 661                 cur.popRight();
 662                 break;
 663
 664         case LFUN_SELF_INSERT:
 665                 if (cmd.argument().size() != 1) {
 666                         recordUndo(cur);
 667                         string const arg = lyx::to_utf8(cmd.argument());
 668                         if (!interpret(cur, arg))
 669                                 cur.insert(arg);
 670                         break;
 671                 }
 672                 // Don't record undo steps if we are in macro mode and
 673                 // cmd.argument is the next character of the macro name.
 674                 // Otherwise we'll get an invalid cursor if we undo after
 675                 // the macro was finished and the macro is a known command,
 676                 // e.g. sqrt. LCursor::macroModeClose replaces in this case
 677                 // the InsetMathUnknown with name "frac" by an empty
 678                 // InsetMathFrac -> a pos value > 0 is invalid.
 679                 // A side effect is that an undo before the macro is finished
 680                 // undoes the complete macro, not only the last character.
 681                 if (!cur.inMacroMode())
 682                         recordUndo(cur);
 683
 684                 // spacial handling of space. If we insert an inset
 685                 // via macro mode, we want to put the cursor inside it
 686                 // if relevant. Think typing "\frac<space>".
 687                 if (cmd.argument()[0] == ' '
 688                     && cur.inMacroMode() && cur.macroName() != "\\"
 689                     && cur.macroModeClose()) {
 690                         MathAtom const atom = cur.prevAtom();
 691                         if (atom->asNestInset() && atom->nargs() > 0) {
 692                                 cur.posLeft();
 693                                 cur.pushLeft(*cur.nextInset());
 694                         }
 695                 // FIXME: Change to
 696                 // } else if (!interpret(cur, cmd.argument()[0])) {
 697                 // when interpret accepts UCS4 characters
 698                 } else if (!interpret(cur, lyx::to_utf8(cmd.argument()))) {
 699                         cmd = FuncRequest(LFUN_FINISHED_RIGHT);
 700                         cur.undispatched();
 701                 }
 702                 break;
 703
 704         //case LFUN_SERVER_GET_XY:
 705         //      sprintf(dispatch_buffer, "%d %d",);
 706         //      break;
 707
 708         case LFUN_SERVER_SET_XY: {
 709                 lyxerr << "LFUN_SERVER_SET_XY broken!" << endl;
 710                 int x = 0;
 711                 int y = 0;
 712                 istringstream is(lyx::to_utf8(cmd.argument()));
 713                 is >> x >> y;
 714                 cur.setScreenPos(x, y);
 715                 break;
 716         }
 717
 718         // Special casing for superscript in case of LyX handling
 719         // dead-keys:
 720         case LFUN_ACCENT_CIRCUMFLEX:
 721                 if (cmd.argument().empty()) {
 722                         // do superscript if LyX handles
 723                         // deadkeys
 724                         recordUndo(cur, Undo::ATOMIC);
 725                         script(cur, true, grabAndEraseSelection(cur));
 726                 }
 727                 break;
 728
 729         case LFUN_ACCENT_UMLAUT:
 730         case LFUN_ACCENT_ACUTE:
 731         case LFUN_ACCENT_GRAVE:
 732         case LFUN_ACCENT_BREVE:
 733         case LFUN_ACCENT_DOT:
 734         case LFUN_ACCENT_MACRON:
 735         case LFUN_ACCENT_CARON:
 736         case LFUN_ACCENT_TILDE:
 737         case LFUN_ACCENT_CEDILLA:
 738         case LFUN_ACCENT_CIRCLE:
 739         case LFUN_ACCENT_UNDERDOT:
 740         case LFUN_ACCENT_TIE:
 741         case LFUN_ACCENT_OGONEK:
 742         case LFUN_ACCENT_HUNGARIAN_UMLAUT:
 743                 break;
 744
 745         //  Math fonts
 746         case LFUN_FONT_FREE_APPLY:
 747         case LFUN_FONT_FREE_UPDATE:
 748                 handleFont2(cur, lyx::to_utf8(cmd.argument()));
 749                 break;
 750
 751         case LFUN_FONT_BOLD:
 752                 if (currentMode() == TEXT_MODE)
 753                         handleFont(cur, lyx::to_utf8(cmd.argument()), "textbf");
 754                 else
 755                         handleFont(cur, lyx::to_utf8(cmd.argument()), "mathbf");
 756                 break;
 757         case LFUN_FONT_SANS:
 758                 if (currentMode() == TEXT_MODE)
 759                         handleFont(cur, lyx::to_utf8(cmd.argument()), "textsf");
 760                 else
 761                         handleFont(cur, lyx::to_utf8(cmd.argument()), "mathsf");
 762                 break;
 763         case LFUN_FONT_EMPH:
 764                 if (currentMode() == TEXT_MODE)
 765                         handleFont(cur, lyx::to_utf8(cmd.argument()), "emph");
 766                 else
 767                         handleFont(cur, lyx::to_utf8(cmd.argument()), "mathcal");
 768                 break;
 769         case LFUN_FONT_ROMAN:
 770                 if (currentMode() == TEXT_MODE)
 771                         handleFont(cur, lyx::to_utf8(cmd.argument()), "textrm");
 772                 else
 773                         handleFont(cur, lyx::to_utf8(cmd.argument()), "mathrm");
 774                 break;
 775         case LFUN_FONT_CODE:
 776                 if (currentMode() == TEXT_MODE)
 777                         handleFont(cur, lyx::to_utf8(cmd.argument()), "texttt");
 778                 else
 779                         handleFont(cur, lyx::to_utf8(cmd.argument()), "mathtt");
 780                 break;
 781         case LFUN_FONT_FRAK:
 782                 handleFont(cur, lyx::to_utf8(cmd.argument()), "mathfrak");
 783                 break;
 784         case LFUN_FONT_ITAL:
 785                 if (currentMode() == TEXT_MODE)
 786                         handleFont(cur, lyx::to_utf8(cmd.argument()), "textit");
 787                 else
 788                         handleFont(cur, lyx::to_utf8(cmd.argument()), "mathit");
 789                 break;
 790         case LFUN_FONT_NOUN:
 791                 if (currentMode() == TEXT_MODE)
 792                         // FIXME: should be "noun"
 793                         handleFont(cur, lyx::to_utf8(cmd.argument()), "textsc");
 794                 else
 795                         handleFont(cur, lyx::to_utf8(cmd.argument()), "mathbb");
 796                 break;
 797         //case LFUN_FONT_FREE_APPLY:
 798                 handleFont(cur, lyx::to_utf8(cmd.argument()), "textrm");
 799                 break;
 800         case LFUN_FONT_DEFAULT:
 801                 handleFont(cur, lyx::to_utf8(cmd.argument()), "textnormal");
 802                 break;
 803
 804         case LFUN_MATH_MODE: {
 805 #if 1
 806                 // ignore math-mode on when already in math mode
 807                 if (currentMode() == InsetBase::MATH_MODE && cmd.argument() == "on")
 808                         break;
 809                 cur.macroModeClose();
 810                 string const save_selection = grabAndEraseSelection(cur);
 811                 selClearOrDel(cur);
 812                 //cur.plainInsert(MathAtom(new InsetMathMBox(cur.bv())));
 813                 cur.plainInsert(MathAtom(new InsetMathBox("mbox")));
 814                 cur.posLeft();
 815                 cur.pushLeft(*cur.nextInset());
 816                 cur.niceInsert(save_selection);
 817 #else
 818                 if (currentMode() == InsetBase::TEXT_MODE) {
 819                         cur.niceInsert(MathAtom(new InsetMathHull("simple")));
 820                         cur.message(_("create new math text environment ($...$)"));
 821                 } else {
 822                         handleFont(cur, lyx::to_utf8(cmd.argument()), "textrm");
 823                         cur.message(_("entered math text mode (textrm)"));
 824                 }
 825 #endif
 826                 break;
 827         }
 828
 829         case LFUN_MATH_SIZE:
 830 #if 0
 831                 recordUndo(cur);
 832                 cur.setSize(arg);
 833 #endif
 834                 break;
 835
 836         case LFUN_MATH_MATRIX: {
 837                 recordUndo(cur, Undo::ATOMIC);
 838                 unsigned int m = 1;
 839                 unsigned int n = 1;
 840                 string v_align;
 841                 string h_align;
 842                 istringstream is(lyx::to_utf8(cmd.argument()));
 843                 is >> m >> n >> v_align >> h_align;
 844                 if (m < 1)
 845                         m = 1;
 846                 if (n < 1)
 847                         n = 1;
 848                 v_align += 'c';
 849                 cur.niceInsert(
 850                         MathAtom(new InsetMathArray("array", m, n, v_align[0], h_align)));
 851                 break;
 852         }
 853
 854         case LFUN_MATH_DELIM: {
 855                 string ls;
 856                 string rs = lyx::support::split(lyx::to_utf8(cmd.argument()), ls, ' ');
 857                 // Reasonable default values
 858                 if (ls.empty())
 859                         ls = '(';
 860                 if (rs.empty())
 861                         rs = ')';
 862                 recordUndo(cur, Undo::ATOMIC);
 863                 cur.handleNest(MathAtom(new InsetMathDelim(ls, rs)));
 864                 break;
 865         }
 866
 867         case LFUN_MATH_BIGDELIM: {
 868                 string const lname = cmd.getArg(0);
 869                 string const ldelim = cmd.getArg(1);
 870                 string const rname = cmd.getArg(2);
 871                 string const rdelim = cmd.getArg(3);
 872                 latexkeys const * l = in_word_set(lname);
 873                 bool const have_l = l && l->inset == "big" &&
 874                                     InsetMathBig::isBigInsetDelim(ldelim);
 875                 l = in_word_set(rname);
 876                 bool const have_r = l && l->inset == "big" &&
 877                                     InsetMathBig::isBigInsetDelim(rdelim);
 878                 // We mimic LFUN_MATH_DELIM in case we have an empty left
 879                 // or right delimiter.
 880                 if (have_l || have_r) {
 881                         recordUndo(cur, Undo::ATOMIC);
 882                         string const selection = grabAndEraseSelection(cur);
 883                         selClearOrDel(cur);
 884                         if (have_l)
 885                                 cur.insert(MathAtom(new InsetMathBig(lname,
 886                                                                 ldelim)));
 887                         cur.niceInsert(selection);
 888                         if (have_r)
 889                                 cur.insert(MathAtom(new InsetMathBig(rname,
 890                                                                 rdelim)));
 891                 }
 892                 // Don't call cur.undispatched() if we did nothing, this would
 893                 // lead to infinite recursion via LyXText::dispatch().
 894                 break;
 895         }
 896
 897         case LFUN_SPACE_INSERT:
 898         case LFUN_MATH_SPACE:
 899                 recordUndo(cur, Undo::ATOMIC);
 900                 cur.insert(MathAtom(new InsetMathSpace(",")));
 901                 break;
 902
 903         case LFUN_ERT_INSERT:
 904                 // interpret this as if a backslash was typed
 905                 recordUndo(cur, Undo::ATOMIC);
 906                 interpret(cur, '\\');
 907                 break;
 908
 909         case LFUN_MATH_SUBSCRIPT:
 910                 // interpret this as if a _ was typed
 911                 recordUndo(cur, Undo::ATOMIC);
 912                 interpret(cur, '_');
 913                 break;
 914
 915         case LFUN_MATH_SUPERSCRIPT:
 916                 // interpret this as if a ^ was typed
 917                 recordUndo(cur, Undo::ATOMIC);
 918                 interpret(cur, '^');
 919                 break;
 920
 921 // FIXME: We probably should swap parts of "math-insert" and "self-insert"
 922 // handling such that "self-insert" works on "arbitrary stuff" too, and
 923 // math-insert only handles special math things like "matrix".
 924         case LFUN_MATH_INSERT: {
 925                 recordUndo(cur, Undo::ATOMIC);
 926                 if (cmd.argument() == "^" || cmd.argument() == "_")
 927                         interpret(cur, cmd.argument()[0]);
 928                 else
 929                         cur.niceInsert(lyx::to_utf8(cmd.argument()));
 930                 break;
 931                 }
 932
 933         case LFUN_DIALOG_SHOW_NEW_INSET: {
 934                 string const & name = lyx::to_utf8(cmd.argument());
 935                 string data;
 936                 if (name == "ref") {
 937                         RefInset tmp(name);
 938                         data = tmp.createDialogStr(name);
 939                 }
 940                 cur.bv().showInsetDialog(name, data, 0);
 941                 break;
 942         }
 943
 944         case LFUN_INSET_INSERT: {
 945                 MathArray ar;
 946                 if (createInsetMath_fromDialogStr(lyx::to_utf8(cmd.argument()), ar)) {
 947                         recordUndo(cur);
 948                         cur.insert(ar);
 949                 } else
 950                         cur.undispatched();
 951                 break;
 952         }
 953
 954         default:
 955                 InsetMathDim::doDispatch(cur, cmd);
 956                 break;
 957         }
 958 }
 959
 960
 961 bool InsetMathNest::getStatus(LCursor & cur, FuncRequest const & cmd,
 962                 FuncStatus & flag) const
 963 {
 964         // the font related toggles
 965         //string tc = "mathnormal";
 966         bool ret = true;
 967         string const arg = lyx::to_utf8(cmd.argument());
 968         switch (cmd.action) {
 969         case LFUN_TABULAR_FEATURE:
 970                 flag.enabled(false);
 971                 break;
 972 #if 0
 973         case LFUN_TABULAR_FEATURE:
 974                 // FIXME: check temporarily disabled
 975                 // valign code
 976                 char align = mathcursor::valign();
 977                 if (align == '\0') {
 978                         enable = false;
 979                         break;
 980                 }
 981                 if (cmd.argument().empty()) {
 982                         flag.clear();
 983                         break;
 984                 }
 985                 if (!contains("tcb", cmd.argument()[0])) {
 986                         enable = false;
 987                         break;
 988                 }
 989                 flag.setOnOff(cmd.argument()[0] == align);
 990                 break;
 991 #endif
 992         /// We have to handle them since 1.4 blocks all unhandled actions
 993         case LFUN_FONT_ITAL:
 994         case LFUN_FONT_BOLD:
 995         case LFUN_FONT_SANS:
 996         case LFUN_FONT_EMPH:
 997         case LFUN_FONT_CODE:
 998         case LFUN_FONT_NOUN:
 999         case LFUN_FONT_ROMAN:
1000         case LFUN_FONT_DEFAULT:
1001                 flag.enabled(true);
1002                 break;
1003         case LFUN_MATH_MUTATE:
1004                 //flag.setOnOff(mathcursor::formula()->hullType() == lyx::to_utf8(cmd.argument()));
1005                 flag.setOnOff(false);
1006                 break;
1007
1008         // we just need to be in math mode to enable that
1009         case LFUN_MATH_SIZE:
1010         case LFUN_MATH_SPACE:
1011         case LFUN_MATH_LIMITS:
1012         case LFUN_MATH_NONUMBER:
1013         case LFUN_MATH_NUMBER:
1014         case LFUN_MATH_EXTERN:
1015                 flag.enabled(true);
1016                 break;
1017
1018         case LFUN_FONT_FRAK:
1019                 flag.enabled(currentMode() != TEXT_MODE);
1020                 break;
1021
1022         case LFUN_MATH_INSERT: {
1023                 bool const textarg =
1024                         arg == "\\textbf"   || arg == "\\textsf" ||
1025                         arg == "\\textrm"   || arg == "\\textmd" ||
1026                         arg == "\\textit"   || arg == "\\textsc" ||
1027                         arg == "\\textsl"   || arg == "\\textup" ||
1028                         arg == "\\texttt"   || arg == "\\textbb" ||
1029                         arg == "\\textnormal";
1030                 flag.enabled(currentMode() != TEXT_MODE || textarg);
1031                 break;
1032         }
1033
1034         case LFUN_MATH_MATRIX:
1035                 flag.enabled(currentMode() == MATH_MODE);
1036                 break;
1037
1038         case LFUN_INSET_INSERT: {
1039                 // Don't test createMathInset_fromDialogStr(), since
1040                 // getStatus is not called with a valid reference and the
1041                 // dialog would not be applyable.
1042                 string const name = cmd.getArg(0);
1043                 flag.enabled(name == "ref");
1044                 break;
1045         }
1046
1047         case LFUN_MATH_DELIM:
1048         case LFUN_MATH_BIGDELIM:
1049                 // Don't do this with multi-cell selections
1050                 flag.enabled(cur.selBegin().idx() == cur.selEnd().idx());
1051                 break;
1052
1053         default:
1054                 ret = false;
1055                 break;
1056         }
1057         return ret;
1058 }
1059
1060
1061 void InsetMathNest::edit(LCursor & cur, bool left)
1062 {
1063         cur.push(*this);
1064         cur.idx() = left ? 0 : cur.lastidx();
1065         cur.pos() = left ? 0 : cur.lastpos();
1066         cur.resetAnchor();
1067         //lyxerr << "InsetMathNest::edit, cur:\n" << cur << endl;
1068 }
1069
1070
1071 InsetBase * InsetMathNest::editXY(LCursor & cur, int x, int y)
1072 {
1073         int idx_min = 0;
1074         int dist_min = 1000000;
1075         for (idx_type i = 0, n = nargs(); i != n; ++i) {
1076                 int const d = cell(i).dist(x, y);
1077                 if (d < dist_min) {
1078                         dist_min = d;
1079                         idx_min = i;
1080                 }
1081         }
1082         MathArray & ar = cell(idx_min);
1083         cur.push(*this);
1084         cur.idx() = idx_min;
1085         cur.pos() = ar.x2pos(x - ar.xo());
1086         //lyxerr << "found cell : " << idx_min << " pos: " << cur.pos() << endl;
1087         if (dist_min == 0) {
1088                 // hit inside cell
1089                 for (pos_type i = 0, n = ar.size(); i < n; ++i)
1090                         if (ar[i]->covers(x, y))
1091                                 return ar[i].nucleus()->editXY(cur, x, y);
1092         }
1093         return this;
1094 }
1095
1096
1097 void InsetMathNest::lfunMousePress(LCursor & cur, FuncRequest & cmd)
1098 {
1099         //lyxerr << "## lfunMousePress: buttons: " << cmd.button() << endl;
1100         BufferView & bv = cur.bv();
1101         if (cmd.button() == mouse_button::button1) {
1102                 //lyxerr << "## lfunMousePress: setting cursor to: " << cur << endl;
1103                 bv.mouseSetCursor(cur);
1104         } else if (cmd.button() == mouse_button::button2) {
1105                 MathArray ar;
1106                 if (cur.selection())
1107                         asArray(lyx::to_utf8(bv.cursor().selectionAsString(false)), ar);
1108                 else
1109                         asArray(lyx::to_utf8(theSelection().get()), ar);
1110
1111                 cur.insert(ar);
1112                 bv.mouseSetCursor(cur);
1113         }
1114 }
1115
1116
1117 void InsetMathNest::lfunMouseMotion(LCursor & cur, FuncRequest & cmd)
1118 {
1119         // only select with button 1
1120         if (cmd.button() == mouse_button::button1) {
1121                 LCursor & bvcur = cur.bv().cursor();
1122                 if (bvcur.anchor_.hasPart(cur)) {
1123                         //lyxerr << "## lfunMouseMotion: cursor: " << cur << endl;
1124                         bvcur.setCursor(cur);
1125                         bvcur.selection() = true;
1126                         //lyxerr << "MOTION " << bvcur << endl;
1127                 }
1128                 else {
1129                         cur.undispatched();
1130                 }
1131         }
1132 }
1133
1134
1135 void InsetMathNest::lfunMouseRelease(LCursor & cur, FuncRequest & cmd)
1136 {
1137         //lyxerr << "## lfunMouseRelease: buttons: " << cmd.button() << endl;
1138
1139         if (cmd.button() == mouse_button::button1) {
1140                 //theSelection().put(cur.grabSelection());
1141                 return;
1142         }
1143
1144         if (cmd.button() == mouse_button::button3) {
1145                 // try to dispatch to enclosed insets first
1146                 cur.bv().showDialog("mathpanel");
1147                 return;
1148         }
1149
1150         cur.undispatched();
1151 }
1152
1153
1154 bool InsetMathNest::interpret(LCursor & cur, char c)
1155 {
1156         //lyxerr << "interpret 2: '" << c << "'" << endl;
1157         string save_selection;
1158         if (c == '^' || c == '_')
1159                 save_selection = grabAndEraseSelection(cur);
1160
1161         cur.clearTargetX();
1162
1163         // handle macroMode
1164         if (cur.inMacroMode()) {
1165                 string name = cur.macroName();
1166
1167                 /// are we currently typing '#1' or '#2' or...?
1168                 if (name == "\\#") {
1169                         cur.backspace();
1170                         int n = c - '0';
1171                         if (n >= 1 && n <= 9)
1172                                 cur.insert(new MathMacroArgument(n));
1173                         return true;
1174                 }
1175
1176                 if (isalpha(c)) {
1177                         cur.activeMacro()->setName(name + c);
1178                         return true;
1179                 }
1180
1181                 // handle 'special char' macros
1182                 if (name == "\\") {
1183                         // remove the '\\'
1184                         if (c == '\\') {
1185                                 cur.backspace();
1186                                 if (currentMode() == InsetMath::TEXT_MODE)
1187                                         cur.niceInsert(createInsetMath("textbackslash"));
1188                                 else
1189                                         cur.niceInsert(createInsetMath("backslash"));
1190                         } else if (c == '{') {
1191                                 cur.backspace();
1192                                 cur.niceInsert(MathAtom(new InsetMathBrace));
1193                         } else if (c == '%') {
1194                                 cur.backspace();
1195                                 cur.niceInsert(MathAtom(new InsetMathComment));
1196                         } else if (c == '#') {
1197                                 BOOST_ASSERT(cur.activeMacro());
1198                                 cur.activeMacro()->setName(name + c);
1199                         } else {
1200                                 cur.backspace();
1201                                 cur.niceInsert(createInsetMath(string(1, c)));
1202                         }
1203                         return true;
1204                 }
1205
1206                 // One character big delimiters. The others are handled in
1207                 // the other interpret() method.
1208                 latexkeys const * l = in_word_set(name.substr(1));
1209                 if (name[0] == '\\' && l && l->inset == "big") {
1210                         string delim;
1211                         switch (c) {
1212                         case '{':
1213                                 delim = "\\{";
1214                                 break;
1215                         case '}':
1216                                 delim = "\\}";
1217                                 break;
1218                         default:
1219                                 delim = string(1, c);
1220                                 break;
1221                         }
1222                         if (InsetMathBig::isBigInsetDelim(delim)) {
1223                                 // name + delim ared a valid InsetMathBig.
1224                                 // We can't use cur.macroModeClose() because
1225                                 // it does not handle delim.
1226                                 InsetMathUnknown * p = cur.activeMacro();
1227                                 p->finalize();
1228                                 --cur.pos();
1229                                 cur.cell().erase(cur.pos());
1230                                 cur.plainInsert(MathAtom(
1231                                         new InsetMathBig(name.substr(1), delim)));
1232                                 return true;
1233                         }
1234                 }
1235
1236                 // leave macro mode and try again if necessary
1237                 cur.macroModeClose();
1238                 if (c == '{')
1239                         cur.niceInsert(MathAtom(new InsetMathBrace));
1240                 else if (c != ' ')
1241                         interpret(cur, c);
1242                 return true;
1243         }
1244
1245         // This is annoying as one has to press <space> far too often.
1246         // Disable it.
1247
1248 #if 0
1249                 // leave autocorrect mode if necessary
1250                 if (autocorrect() && c == ' ') {
1251                         autocorrect() = false;
1252                         return true;
1253                 }
1254 #endif
1255
1256         // just clear selection on pressing the space bar
1257         if (cur.selection() && c == ' ') {
1258                 cur.selection() = false;
1259                 return true;
1260         }
1261
1262         selClearOrDel(cur);
1263
1264         if (c == '\\') {
1265                 //lyxerr << "starting with macro" << endl;
1266                 cur.insert(MathAtom(new InsetMathUnknown("\\", false)));
1267                 return true;
1268         }
1269
1270         if (c == '\n') {
1271                 if (currentMode() == InsetMath::TEXT_MODE)
1272                         cur.insert(c);
1273                 return true;
1274         }
1275
1276         if (c == ' ') {
1277                 if (currentMode() == InsetMath::TEXT_MODE) {
1278                         // insert spaces in text mode,
1279                         // but suppress direct insertion of two spaces in a row
1280                         // the still allows typing  '<space>a<space>' and deleting the 'a', but
1281                         // it is better than nothing...
1282                         if (!cur.pos() != 0 || cur.prevAtom()->getChar() != ' ')
1283                                 cur.insert(c);
1284                         return true;
1285                 }
1286                 if (cur.pos() != 0 && cur.prevAtom()->asSpaceInset()) {
1287                         cur.prevAtom().nucleus()->asSpaceInset()->incSpace();
1288                         return true;
1289                 }
1290                 if (cur.popRight())
1291                         return true;
1292                 // if are at the very end, leave the formula
1293                 return cur.pos() != cur.lastpos();
1294         }
1295
1296         // These shouldn't work in text mode:
1297         if (currentMode() != InsetMath::TEXT_MODE) {
1298                 if (c == '_') {
1299                         script(cur, false, save_selection);
1300                         return true;
1301                 }
1302                 if (c == '^') {
1303                         script(cur, true, save_selection);
1304                         return true;
1305                 }
1306                 if (c == '~') {
1307                         cur.niceInsert(createInsetMath("sim"));
1308                         return true;
1309                 }
1310         }
1311
1312         if (c == '{' || c == '}' || c == '&' || c == '$' || c == '#' ||
1313             c == '%' || c == '_' || c == '^') {
1314                 cur.niceInsert(createInsetMath(string(1, c)));
1315                 return true;
1316         }
1317
1318
1319         // try auto-correction
1320         //if (autocorrect() && hasPrevAtom() && math_autocorrect(prevAtom(), c))
1321         //      return true;
1322
1323         // no special circumstances, so insert the character without any fuss
1324         cur.insert(c);
1325         cur.autocorrect() = true;
1326         return true;
1327 }
1328
1329
1330 bool InsetMathNest::interpret(LCursor & cur, string const & str)
1331 {
1332         // Create a InsetMathBig from cur.cell()[cur.pos() - 1] and t if
1333         // possible
1334         if (!cur.empty() && cur.pos() > 0 &&
1335             cur.cell()[cur.pos() - 1]->asUnknownInset()) {
1336                 if (InsetMathBig::isBigInsetDelim(str)) {
1337                         string prev = asString(cur.cell()[cur.pos() - 1]);
1338                         if (prev[0] == '\\') {
1339                                 prev = prev.substr(1);
1340                                 latexkeys const * l = in_word_set(prev);
1341                                 if (l && l->inset == "big") {
1342                                         cur.cell()[cur.pos() - 1] =
1343                                                 MathAtom(new InsetMathBig(prev, str));
1344                                         return true;
1345                                 }
1346                         }
1347                 }
1348         }
1349         return false;
1350 }
1351
1352
1353 bool InsetMathNest::script(LCursor & cur, bool up, string const &
1354                 save_selection)
1355 {
1356         // Hack to get \^ and \_ working
1357         //lyxerr << "handling script: up: " << up << endl;
1358         if (cur.inMacroMode() && cur.macroName() == "\\") {
1359                 if (up)
1360                         cur.niceInsert(createInsetMath("mathcircumflex"));
1361                 else
1362                         interpret(cur, '_');
1363                 return true;
1364         }
1365
1366         cur.macroModeClose();
1367         if (asScriptInset() && cur.idx() == 0) {
1368                 // we are in a nucleus of a script inset, move to _our_ script
1369                 InsetMathScript * inset = asScriptInset();
1370                 //lyxerr << " going to cell " << inset->idxOfScript(up) << endl;
1371                 inset->ensure(up);
1372                 cur.idx() = inset->idxOfScript(up);
1373                 cur.pos() = 0;
1374         } else if (cur.pos() != 0 && cur.prevAtom()->asScriptInset()) {
1375                 --cur.pos();
1376                 InsetMathScript * inset = cur.nextAtom().nucleus()->asScriptInset();
1377                 cur.push(*inset);
1378                 inset->ensure(up);
1379                 cur.idx() = inset->idxOfScript(up);
1380                 cur.pos() = cur.lastpos();
1381         } else {
1382                 // convert the thing to our left to a scriptinset or create a new
1383                 // one if in the very first position of the array
1384                 if (cur.pos() == 0) {
1385                         //lyxerr << "new scriptinset" << endl;
1386                         cur.insert(new InsetMathScript(up));
1387                 } else {
1388                         //lyxerr << "converting prev atom " << endl;
1389                         cur.prevAtom() = MathAtom(new InsetMathScript(cur.prevAtom(), up));
1390                 }
1391                 --cur.pos();
1392                 InsetMathScript * inset = cur.nextAtom().nucleus()->asScriptInset();
1393                 // special handling of {}-bases
1394                 // is this always correct?
1395                 if (inset->nuc().size() == 1
1396                     && inset->nuc().back()->asBraceInset())
1397                         inset->nuc() = inset->nuc().back()->asNestInset()->cell(0);
1398
1399                 cur.push(*inset);
1400                 cur.idx() = 1;
1401                 cur.pos() = 0;
1402         }
1403         //lyxerr << "inserting selection 1:\n" << save_selection << endl;
1404         cur.niceInsert(save_selection);
1405         cur.resetAnchor();
1406         //lyxerr << "inserting selection 2:\n" << save_selection << endl;
1407         return true;
1408 }